{\n e.stopPropagation();\n this.open = false;\n }}\n >\n (this.open = false)}>\n \n `;\n }\n\n private get isHelpLink(): boolean {\n return this.content?.startsWith(' span {\n display: flex;\n }\n .label {\n display: inline-block;\n font-weight: 600;\n white-space: nowrap;\n }\n :host([list-header]) .label {\n font-weight: 600;\n color: var(--listHeaderColor);\n font-size: 14px;\n text-transform: uppercase;\n letter-spacing: 1px;\n }\n :host([allow-wrap]) .label {\n white-space: normal;\n padding-bottom: 0;\n }\n :host([light]) .label {\n font-weight: 400;\n }\n :host([semibold]) .label {\n font-weight: 500;\n }\n :host([small]) .label {\n font-size: 14px;\n }\n :host([big]) .label {\n font-size: 17px;\n }\n :host([big][list-header]) .label {\n font-size: 20px;\n letter-spacing: normal;\n text-transform: none;\n }\n :host([verybig]) .label {\n font-size: 22px;\n }\n .sublabel {\n font-weight: 400;\n font-size: 15px;\n }\n\n :host([small-sublabel]) .sublabel {\n font-size: 85%;\n }\n\n .sublabel,\n :host([list-header]) .sublabel {\n font-weight: 400;\n font-size: 15px;\n text-transform: none;\n letter-spacing: normal;\n }\n .bullet {\n display: list-item;\n margin: 3px 0 3px var(--listPaddingLeft);\n }\n .bullet .label {\n display: inline;\n font-weight: normal;\n }\n .template-updated .label:before {\n display: inline-block;\n content: '';\n margin-right: 8px;\n width: 12px;\n height: 12px;\n border-radius: 50%;\n background-color: var(--themeColorDarkerOne);\n }\n .alert,\n .alert .label {\n color: hsl(29, 100%, 45%);\n }\n :host([option]) .label {\n font-weight: normal;\n }\n :host([checklist]) .label {\n flex-grow: 1;\n }\n .option.disabled .label {\n cursor: default;\n }\n .checkpoint .label {\n display: block;\n font-weight: normal;\n padding: 4px 0 4px 26px;\n background: url('/images/x-fat-orange.svg') 0 2px no-repeat;\n background-size: 24px 24px;\n }\n .checkpoint .label:before {\n content: 'Ikke oppfylt: ';\n }\n .checkpoint.checked .label {\n background: url('/images/check-mini-blue.svg') 0 2px no-repeat;\n background-size: 24px 24px;\n }\n .checkpoint.checked .label:before {\n content: '';\n }\n .check-blue .label {\n background: url('/images/check-mini-blue.svg') 0 -1px no-repeat;\n background-size: 24px 24px;\n padding-left: 30px;\n }\n :host([verybig]) d-tooltip {\n position: relative;\n top: -4px;\n }\n d-action {\n margin: -6px -4px;\n }\n d-action[mini] {\n margin: -4px -4px;\n }\n `;\n @property({ type: Boolean, attribute: 'list-header', reflect: true })\n listHeader = false;\n @property({ type: String })\n field?: string;\n @property({ type: String })\n label?: string;\n @property({ type: String })\n subfield?: string;\n @property({ type: String })\n sublabel = '';\n @property({ type: String })\n classes = '';\n @property({ type: Boolean, attribute: 'allow-wrap', reflect: true })\n allowWrap = false;\n @property({ type: Boolean, reflect: true })\n light = false;\n @property({ type: Boolean, reflect: true })\n semibold = false;\n @property({ type: Boolean, reflect: true })\n small = false;\n @property({ type: Boolean, reflect: true })\n big = false;\n @property({ type: Boolean, reflect: true })\n verybig = false;\n @property({ type: Boolean, attribute: 'hide-tooltip', reflect: true })\n hideTooltip = false;\n @property({ type: String })\n tooltip = '';\n @property({ type: Boolean, attribute: 'theme-page' })\n themePage = false;\n @property({ type: Boolean, attribute: 'outskirts' })\n outskirts = false;\n @property({ type: String })\n labelAction = '';\n @property({ type: Boolean, attribute: 'label-action-mini' })\n labelActionMini = false;\n @property({ type: Boolean, attribute: 'label-action-plain' })\n labelActionPlain = false;\n @property({ type: Boolean, reflect: true })\n checklist = false;\n private fieldsByCode = commonFieldsByCode();\n\n get computedTooltip() {\n if (!this.hideTooltip) {\n if (!this.tooltip && this.field && this.fieldsByCode && this.fieldsByCode[this.field]) {\n return this.fieldsByCode[this.field].tooltip;\n } else {\n return this.tooltip ?? '';\n }\n }\n return '';\n }\n\n render() {\n return html`\n \n ${this.noLabel(this.label, this.field)\n ? nothing\n : html`\n ${this.computeLabel(this.label, this.fieldsByCode, this.field)}\n ${this.computeLabel(this.sublabel, this.fieldsByCode, this.subfield)} \n `}\n ${this.hasTooltip(this.computedTooltip)\n ? html``\n : nothing}\n ${this.labelAction\n ? html`\n this._labelAction()}\n >${this.labelAction}\n `\n : nothing}\n \n `;\n }\n\n _labelAction() {\n this.dispatchEvent(new CustomEvent('label-action', { bubbles: true, composed: true }));\n }\n\n private noLabel(label: string | undefined, field: string | undefined): boolean {\n return !label && !field;\n }\n\n private computeLabel(label, fields, field) {\n if (field && fields && fields[field]) {\n return fields[field].label;\n }\n if (label) {\n return label;\n }\n return '';\n }\n\n private hasTooltip(v: string) {\n return v !== '';\n }\n\n private onLabelClick() {\n this.dispatchEvent(new Event('label-click', { composed: true, bubbles: true }));\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-label': DLabel;\n }\n}\n","import type { TemplateResult } from 'lit';\nimport { css, html, LitElement, nothing } from 'lit';\nimport '../elements/d-tooltip.js';\nimport '../elements/d-label.js';\nimport { property } from 'lit/decorators.js';\n\n/**\n * Et abstrakt element som brukes som felles oppsett av \"fields\".\n *\n * Forenklet fra tidligere bruk. Mye av sectionInnerElement er flyttet til d-section direkte.\n * Det som gjenstår er at feltet kan ha en \"overskrift\"\n *\n * Representerer det som tidligere var\n * \n *
\n *\n * Det vil si elementer laget for å vises i et \"Entity-view\"\n *\n * Dette skal ikke brukes direkte men arves fra i enkeltelementer\n *\n * Klassene som arver implementerer renderContent og setter\n * css = [super.css, css' ...mer spesifikk css ...']\n *\n * Poenget med disse elementene er at de har border på venstre og høyre, men ikke dobbelt hvis flere vises ved siden av hverandre.\n *\n */\nexport class LabeledElement extends LitElement {\n static readonly styles = [\n css`\n :host {\n display: block;\n }\n\n :host([inline-label]) {\n display: flex;\n }\n\n d-label {\n display: block;\n padding: 0 6px 6px 0;\n }\n\n :host([small-label]) d-label {\n padding-bottom: 2px;\n }\n\n :host([inline-label]) d-label {\n flex: none;\n display: flex;\n padding: 5px 6px 0 0;\n }\n\n :host([light-label]) d-label {\n font-weight: normal;\n }\n\n input,\n textarea,\n .select-wrapper,\n .radioIcon,\n .checkIcon {\n background-color: var(--backgroundLightGray);\n box-shadow: var(--inputElementShadow);\n }\n\n input,\n textarea,\n .grow-wrap,\n .select-wrapper {\n box-sizing: border-box;\n width: 100%;\n border: none;\n border-radius: 0;\n outline: none;\n -webkit-appearance: none;\n font-family: var(--mainSerif), serif;\n font-weight: 200;\n font-size: 15px;\n line-height: 160%;\n color: black;\n }\n\n input,\n .select-wrapper {\n height: var(--inputElementHeight);\n }\n\n input {\n display: flex;\n align-items: center;\n padding: 0 14px 0 10px;\n }\n\n textarea {\n resize: none;\n }\n\n ::placeholder,\n select.placeholder {\n color: var(--placeholderColor);\n }\n\n input[disabled],\n textarea[disabled] {\n opacity: 0.5;\n }\n\n select.placeholder:focus {\n color: black;\n }\n\n :host([theme-page]) input,\n :host([outskirts]) input,\n :host([controller]) input,\n :host([theme-page]) textarea,\n :host([outskirts]) textarea,\n :host([controller]) textarea,\n :host([theme-page]) .select-wrapper,\n :host([outskirts]) .select-wrapper,\n :host([controller]) .select-wrapper,\n :host([theme-page]) .radioIcon,\n :host([outskirts]) .radioIcon,\n :host([controller]) .radioIcon,\n :host([theme-page]) .checkIcon,\n :host([outskirts]) .checkIcon,\n :host([controller]) .checkIcon,\n :host([theme-page]) d-radio-cell,\n :host([outskirts]) d-radio-cell,\n :host([controller]) d-radio-cell {\n box-shadow: none;\n background-color: white;\n }\n\n :host([outskirts]) input[type='text'],\n :host([outskirts]) input[type='email'],\n :host([outskirts]) input[type='password'],\n :host([outskirts]) textarea,\n :host([outskirts]) .select-wrapper,\n :host([outskirts]) .checkIcon,\n :host([theme-page]) textarea,\n :host([theme-page]) .select-wrapper,\n :host([theme-page]) input,\n :host([theme-page]) .checkIcon,\n :host([controller]) textarea,\n :host([controller]) .select-wrapper,\n :host([controller]) input,\n :host([controller]) .checkIcon {\n border-radius: var(--inputElementBorderRadius);\n }\n\n :host([system-content]) input,\n :host([system-content]) textarea,\n :host([system-content]) select {\n font-family: var(--mainSans), sans-serif;\n font-weight: normal;\n }\n\n :host([outskirts]) input {\n height: var(--inputElementHeight);\n margin: 0;\n border: none;\n }\n\n :host([theme-page]) input,\n :host([theme-page]) input[type='search'],\n :host([theme-page]) input[type='password'],\n :host([theme-page]) textarea,\n :host([theme-page]) .select-wrapper,\n :host([controller]) input,\n :host([controller]) input[type='search'],\n :host([controller]) input[type='password'],\n :host([controller]) textarea,\n :host([controller]) .select-wrapper {\n height: calc(var(--inputElementHeight) + 2px);\n border: 1px solid var(--borderColor);\n }\n\n :host([controller]) input,\n :host([controller]) input[type='search'],\n :host([controller]) input[type='password'],\n :host([controller]) textarea,\n :host([controller]) .select-wrapper {\n font-family: var(--mainSans), sans-serif;\n font-weight: 200;\n }\n\n :host([controller]) select {\n font-family: var(--mainSans), sans-serif;\n font-weight: 200;\n }\n\n :host([theme-page]) .checkIcon,\n :host([theme-page]) d-radio-cell,\n :host([controller]) .checkIcon,\n :host([controller]) d-radio-cell {\n border: 1px solid var(--borderColor);\n }\n\n :host([theme-page]) d-radio-cell,\n :host([controller]) d-radio-cell {\n margin-top: -3px;\n }\n\n :host([outskirts]) input,\n :host([outskirts]) .select-wrapper {\n height: var(--inputElementHeight);\n margin: 0;\n border: none;\n }\n\n .select-wrapper[disabled] {\n opacity: 0.5;\n }\n\n input + div {\n position: absolute;\n right: 0;\n top: 0;\n width: 30px;\n height: 30px;\n background: transparent url(/images/x-thin-black.svg) 50% 50% no-repeat;\n background-size: 20px 20px;\n opacity: 0.34;\n cursor: pointer;\n }\n\n :host([controller]) input + div {\n top: 1px;\n }\n\n input + div:hover {\n opacity: 1;\n }\n\n :host([disabled]) input + div:hover {\n opacity: 0.34;\n cursor: default;\n }\n `,\n ];\n\n @property({ type: String })\n field = '';\n @property({ type: String })\n label = '';\n @property({ type: String })\n sublabel = '';\n @property({ type: Boolean, attribute: true, reflect: true })\n disabled = false;\n @property({ type: Boolean, attribute: 'theme-page', reflect: true })\n themePage = false;\n @property({ type: Boolean, attribute: 'outskirts' })\n outskirts = false;\n @property({ type: Boolean, attribute: 'system-content' })\n systemContent = false;\n @property({ type: Boolean, attribute: 'semibold-label' })\n semiboldLabel = false;\n @property({ type: Boolean, attribute: 'light-label' })\n lightLabel = false;\n @property({ type: Boolean, attribute: 'small-label' })\n smallLabel = false;\n @property({ type: Boolean, attribute: 'big-label' })\n bigLabel = false;\n @property({ type: Boolean, attribute: 'wrap-label', reflect: true })\n wrapLabel = false;\n @property({ type: Boolean, attribute: 'inline-label' })\n inlineLabel = false;\n @property({ type: Number, attribute: 'label-min-width' })\n labelMinWidth = 0;\n @property({ type: String, attribute: 'label-action' })\n labelAction = '';\n @property({ type: Boolean, attribute: 'label-action-mini' })\n labelActionMini = false;\n @property({ type: Boolean, attribute: 'label-action-plain' })\n labelActionPlain = false;\n\n /**\n * Optional classes for the label.\n */\n @property({ type: String })\n classes = '';\n\n private get styles() {\n if (this.labelMinWidth > 0) {\n return 'min-width:' + this.labelMinWidth + 'px';\n }\n return '';\n }\n\n render() {\n return html` ${this.renderLabel()} ${this.renderContent()} `;\n }\n\n protected renderContent(): TemplateResult | typeof nothing {\n return nothing;\n }\n\n private renderLabel() {\n return html` ${this.label || this.field\n ? html`
`\n : nothing}`;\n }\n}\n","import type { PropertyValueMap } from 'lit';\nimport { css, html } from 'lit';\nimport { customElement, property, query } from 'lit/decorators.js';\n\nimport '../../elements/d-label.js';\nimport { LabeledElement } from '../../abstracts/labeled-element.js';\n\n/**\n *\n *\n * * Reference:\n * * The Cleanest Trick for Autogrowing Textareas\n * * https://css-tricks.com/the-cleanest-trick-for-autogrowing-textareas/\n *\n *\n * https://github.com/meistudioli/msc-stretch-textarea/blob/main/mjs/wc-msc-stretch-textarea.js\n *\n * @fires value-changed - Dispatched immediately after changes by the user\n *\n * STATUS OK\n */\n@customElement('d-edit-textarea')\nexport class DEditTextarea extends LabeledElement {\n static readonly styles = [\n ...LabeledElement.styles,\n css`\n .grow-wrap {\n display: grid;\n }\n\n .grow-wrap::after {\n content: attr(data-replicated-value) ' ';\n white-space: pre-wrap;\n visibility: hidden;\n }\n\n .grow-wrap > textarea {\n overflow: hidden;\n min-height: 45px;\n height: auto !important;\n }\n\n .grow-wrap > textarea,\n .grow-wrap::after {\n grid-area: 1 / 1 / 2 / 2;\n padding: 8px 10px 10px;\n font: inherit;\n }\n\n :host([toolbar]) textarea {\n box-shadow: none;\n background-color: hsl(0, 0%, 92%);\n border-radius: 4px;\n }\n `,\n ];\n @query('#text')\n textarea!: HTMLTextAreaElement;\n @property({ type: String })\n placeholder = '';\n @property({ type: Number })\n rows = 2;\n @property({ type: Number })\n maxRows = 7;\n @property({ type: String })\n value = '';\n /**\n * Should have input focus when the page loads.\n */\n @property({ type: Boolean })\n autofocus = false;\n @query('div')\n private _growWrapEl?: HTMLDivElement;\n\n focus() {\n this.textarea.focus();\n }\n\n inputHandler(event) {\n this.value = event.target.value;\n\n if (this._growWrapEl) {\n // this._growWrapEl.dataset.replicatedValue = this.value;\n }\n this.dispatchEvent(\n new CustomEvent('value-changed', {\n bubbles: true,\n composed: true,\n detail: { value: this.value },\n }),\n );\n }\n\n renderContent() {\n return html`\n \n \n \n
\n `;\n }\n\n protected firstUpdated(_changedProperties: PropertyValueMap | Map): void {\n if (this.autofocus) {\n this.focus();\n }\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-edit-textarea': DEditTextarea;\n }\n}\n","import { css, html, nothing } from 'lit';\nimport { customElement, property } from 'lit/decorators.js';\nimport '../../elements/d-label.js';\nimport { LabeledElement } from '../../abstracts/labeled-element.js';\nimport type { SelectTagOption } from './select-tag-option';\n\n/**\n *\n *\n * If the single property changes the outer element must also ensure only a single tag is selected.\n *\n * @fires value-changed - Dispatched immediately after changes by the user\n *\n * STATUS OK\n */\n@customElement('d-select-tag')\nexport class DSelectTag extends LabeledElement {\n static readonly styles = [\n ...LabeledElement.styles,\n css`\n :host {\n display: block;\n margin-bottom: -4px;\n }\n\n :host > div {\n display: flex;\n flex-wrap: wrap;\n }\n\n .tag {\n flex: none;\n display: flex;\n align-items: center;\n justify-content: center;\n box-sizing: border-box;\n min-width: 30px;\n margin-right: 4px;\n margin-bottom: 4px;\n padding: 0 10px;\n height: var(--inputElementHeight);\n background: hsla(0, 0%, 0%, 0.05);\n font-family: var(--mainSans), sans-serif;\n font-size: 13px;\n line-height: 100%;\n color: hsla(0, 0%, 0%, 0.5);\n cursor: pointer;\n }\n\n :host([disabled]) .tag {\n opacity: 0.5;\n cursor: default;\n }\n\n :host([controller]) .tag {\n border: 1px solid var(--borderColor);\n border-radius: 4px;\n background: white;\n }\n\n .tag.toggle-all {\n background-color: hsla(0, 0%, 0%, 0.1);\n font-family: var(--small), sans-serif;\n color: hsla(1, 0%, 0%, 0.7);\n text-transform: uppercase;\n letter-spacing: 1px;\n font-size: 11px;\n font-weight: 500;\n }\n\n :host:not([disabled]) .tag.toggle-all:hover {\n color: white;\n background-color: hsla(0, 0%, 0%, 0.5);\n }\n\n .tag[disabled] {\n opacity: 0.5;\n cursor: default;\n }\n\n .tag[selected] {\n background: var(--themeColor);\n color: white;\n }\n\n :host([controller]) .tag[selected] {\n border-color: var(--themeColor);\n background: var(--themeColor);\n color: white;\n }\n\n .tag.toggle-all[selected] {\n color: white;\n background-color: hsla(0, 0%, 0%, 0.5);\n }\n\n @media (hover: hover) {\n .tag.new:hover {\n background: var(--themeColor);\n color: white;\n }\n }\n `,\n ];\n @property({ type: Array })\n value: string[] = [];\n @property({ type: Array })\n options: SelectTagOption[] = [];\n @property({ type: Boolean, attribute: 'toggle-all', reflect: true })\n toggleAll = false;\n @property({ type: Boolean, attribute: 'not-deselectable', reflect: true })\n notDeselectable = false;\n @property({ type: Boolean, reflect: true })\n single = false;\n @property({ type: Boolean, reflect: true })\n controller = false;\n @property({ type: String, attribute: 'add-new-text' })\n addNewText = '';\n\n private get allSelected() {\n const selectable = this.options.filter((o) => {\n return !o.disabled || this.value.indexOf(o.value) > -1;\n });\n return selectable.length === this.value.length;\n }\n\n _selected(value) {\n return (this.value ?? []).includes(value);\n }\n\n _style(item) {\n if (this._selected(item.value) && item.styleForSelected) {\n return item.styleForSelected;\n }\n return '';\n }\n\n renderContent() {\n return html`\n \n ${this.toggleAll\n ? html`\n
this.toggleAllItems()}>\n Alle\n
\n `\n : nothing}\n ${this.options.map(\n (item) =>\n html`
this.toggleItem(item)}\n ?selected=\"${this._selected(item.value)}\"\n style=\"${this._style(item)}\"\n >\n ${item.text}\n this.addNew()}>${this.addNewText}
`\n : nothing}\n Send en epost til kolleger med lenke til dette innholdet. ' +\n 'Innhold med begrenset tilgang vil bare kunne ses av dem som er gitt tilgang.
';\n\n protected get calculatedHeaderActions() {\n return [\n { name: 'Avbryt', action: 'cancel' },\n { name: 'Send', action: 'send', disabled: this.sendDisabled },\n ];\n }\n\n private get employeeOptions(): SelectTagOption[] {\n return this.employees.map((e) => {\n return { value: e.uuid, text: e.name, disabled: e.disabled };\n });\n }\n\n private get sendDisabled() {\n return (\n this.recipients.filter((r) => {\n return (\n this.employees.filter((e) => {\n return e.uuid === r && !e.disabled;\n }).length > 0\n );\n }).length === 0\n );\n }\n\n renderBody() {\n return html`\n \n \n \n \n {\n this.message = e.detail.value;\n }}\n >\n \n \n {\n this.recipients = e.detail.value;\n }}\n >\n \n \n `;\n }\n\n protected fetchResult(detail: string | undefined): ShareContentResult {\n return {\n action: detail === 'send' ? 'send' : 'cancel',\n message: detail === 'send' ? this.message : '',\n recipients: detail === 'send' ? this.recipients : [],\n };\n }\n\n protected initializeDialog(input: ShareContentInput) {\n this.employees = input.employees;\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-share-content-dialog': DShareContentDialog;\n }\n}\n","import { css } from 'lit';\n\nexport const levelHeaderStyles = css`\n :host {\n display: block;\n position: -webkit-sticky;\n position: sticky;\n top: calc(-1px + var(--safe-area-inset-top));\n z-index: 3;\n }\n\n :host(#small-header),\n :host(#large-header) {\n position: absolute;\n width: 100%;\n visibility: hidden;\n }\n\n :host([covered]) {\n position: relative;\n top: 0;\n }\n\n .header-wrapper {\n position: -webkit-sticky;\n position: sticky;\n top: calc(-1px + var(--safe-area-inset-top));\n z-index: 3;\n }\n\n .special-header {\n display: flex;\n flex-direction: row-reverse;\n flex-wrap: wrap;\n justify-content: space-between;\n align-items: flex-end;\n background-color: hsl(1, 0%, 96%);\n padding: 10px 20px 14px 20px;\n color: hsl(1, 0%, 40%);\n }\n\n .special-header d-label {\n flex-grow: 1;\n display: flex;\n flex-wrap: wrap;\n align-items: baseline;\n margin: 0;\n padding: 6px 0 0 32px;\n background-position: -4px -2px;\n background-repeat: no-repeat;\n background-size: 32px 32px;\n color: hsl(1, 0%, 40%);\n }\n\n .special-header .actions d-action {\n margin: -5px -8px -8px 0;\n }\n\n .draft-header d-label {\n background-image: url(/images/draft.svg);\n }\n\n .trash-header d-label {\n background-image: url(/images/trash.svg);\n }\n\n .header {\n display: flex;\n flex-direction: row-reverse;\n flex-wrap: wrap;\n justify-content: space-between;\n align-items: flex-end;\n padding-top: 10px;\n z-index: 3;\n transition: all var(--transition);\n }\n\n :host(:not([no-margin])) .header {\n margin: 0 20px;\n }\n\n :host(.width600:not([no-margin])) .header {\n margin: 0 30px;\n }\n\n :host([covered]) .header {\n padding-top: 2px;\n }\n\n .header .actions {\n flex: none;\n align-self: flex-start;\n text-align: right;\n max-height: 36px;\n margin: -8px -8px -10px 0;\n transition: all var(--transition);\n }\n\n d-more-menu {\n margin-bottom: -11px;\n margin-right: -8px;\n margin-left: -4px;\n }\n\n .actions ::slotted(d-action) {\n font-size: 10px;\n }\n\n .header-link {\n position: absolute;\n top: 0;\n right: 0;\n bottom: 0;\n left: 0;\n }\n\n :host([covered]) .actions {\n max-height: 0;\n overflow: hidden;\n }\n\n .title {\n flex-grow: 1;\n display: flex;\n flex-wrap: wrap;\n align-items: baseline;\n overflow: hidden;\n margin: 0;\n padding: 14px 0 18px 0;\n background-position: 0 6px;\n background-repeat: no-repeat;\n mix-blend-mode: multiply;\n color: var(--pageHeaderColor);\n font-family: var(--mainSans), sans-serif;\n font-weight: bold;\n font-size: 22px;\n line-height: 110%;\n word-break: break-word;\n transition:\n min-height var(--transition),\n font-size var(--transition),\n line-height var(--transition),\n padding var(--transition),\n margin var(--transition),\n background-position var(--transition),\n background-size var(--transition);\n }\n\n .title.icon {\n padding-left: 40px;\n background-size: 40px 40px;\n background-position: -4px 5px;\n }\n\n .title.icon.robot {\n background-image: url('data:image/svg+xml,');\n background-repeat: no-repeat;\n background-size: 32px 32px;\n background-position: 0 9px;\n }\n\n :host([covered]) .title,\n :host([top]) .title {\n top: 6px;\n margin-top: 2px;\n padding: 8px 0 14px 0;\n color: hsl(1, 0%, 50%);\n font-size: 15px;\n cursor: pointer;\n }\n\n :host([covered]) .title.icon,\n :host([top]) .title.icon {\n background-size: 30px 30px;\n background-position: -2px 1px;\n padding-left: var(--listPaddingLeft);\n }\n\n :host([covered]) .title.icon.robot,\n :host([top]) .title.icon.robot {\n background-size: 24px 24px;\n background-position: 0 3px;\n }\n\n .name {\n margin-right: 0.2em;\n -webkit-user-select: text;\n -ms-user-select: text;\n -moz-user-select: text;\n user-select: text;\n }\n\n :host(.width600) .actions ::slotted(d-action) {\n font-size: 11px;\n }\n\n :host(:not([covered]):not([top]).width600) .header {\n padding-top: 16px;\n padding-bottom: 6px;\n }\n\n :host(:not([covered]):not([top]).width600) .title {\n font-size: 32px;\n }\n\n :host(:not([covered]):not([top]).width600) .title.icon {\n padding-left: 60px;\n background-size: 60px 60px;\n background-position: -6px 0;\n }\n\n :host(:not([covered]):not([top]).width600) .title.icon.robot {\n background-position: 0 6px;\n background-size: 48px auto;\n }\n`;\n","import type { PropertyValues } from 'lit';\nimport { css, html, LitElement } from 'lit';\nimport { customElement, property, query } from 'lit/decorators.js';\n\n/**\n *\n *\n * STATUS OK\n */\n@customElement('d-smooth-resize')\nclass DSmoothResize extends LitElement {\n static readonly styles = css`\n :host {\n display: block;\n overflow: clip;\n transition: all 0.3s;\n }\n #container {\n margin: -1px 0 0 0;\n border: 1px solid transparent;\n }\n `;\n\n @query('#container')\n container!: HTMLElement;\n @property({ type: Boolean })\n disabled = false;\n\n private observer = new ResizeObserver(() => {\n requestAnimationFrame(() => {\n this.onResize();\n });\n });\n\n render() {\n return html`
`;\n }\n\n onResize() {\n if (!this.disabled) {\n this.style.height = this.container.offsetHeight - 2 + 'px';\n }\n }\n\n protected firstUpdated(_changedProperties: PropertyValues) {\n super.firstUpdated(_changedProperties);\n this.observer.observe(this.container);\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-smooth-resize': DSmoothResize;\n }\n}\n","import { css, html, nothing } from 'lit';\nimport { customElement, property, query } from 'lit/decorators.js';\nimport { levelHeaderStyles } from 'src/library/level-header-styles.js';\nimport { ResponsiveElement } from 'src/library/elements/responsive-container.js';\nimport '../library/elements/d-smooth-resize.js';\nimport type { IconEnum } from './icon-enum';\n\n/**\n *\n * STATUS OK\n */\n@customElement('d-page-header')\nexport class DPageHeader extends ResponsiveElement {\n static readonly styles = [\n levelHeaderStyles,\n css`\n :host {\n background: var(--backgroundGray);\n border-top-left-radius: 12px;\n border: 1px solid transparent;\n }\n .header {\n // border-bottom: 1px solid var(--borderColorOnGray);\n background-color: var(--backgroundGray);\n }\n .sublabel {\n font-weight: 400;\n font-size: max(80%, 15px);\n }\n `,\n ];\n @property({ type: String })\n icon: IconEnum = '';\n @property({ type: String })\n label = '';\n @property({ type: String })\n sublabel = '';\n @property({ type: String })\n href = '';\n @property({ type: Boolean, reflect: true })\n covered = false;\n @property({ type: Boolean })\n top = false;\n @query('.header')\n private _headerEl?: HTMLDivElement;\n\n private get titleStyle() {\n if (this.icon && this.icon !== 'robot') {\n const typeName = this.icon.replace(/[A-Z]/g, (m) => '-' + m.toLowerCase());\n return 'background-image: url(/images/' + typeName + '-color' + '.svg)';\n }\n return '';\n }\n\n private get titleClass() {\n if (this.icon) {\n if (this.icon === 'robot') {\n return 'title icon robot';\n }\n return 'title icon';\n }\n return 'title';\n }\n\n onResize() {\n if (this._headerEl) {\n const height = this._headerEl.clientHeight;\n this.dispatchEvent(\n new CustomEvent('height-changed', {\n bubbles: true,\n composed: true,\n detail: height,\n }),\n );\n }\n }\n\n render() {\n return html`\n \n \n \n `;\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-page-header': DPageHeader;\n }\n}\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nfunction getRandomValuesWithMathRandom(bytes) {\n var max = Math.pow(2, 8 * bytes.byteLength / bytes.length);\n for (var i = 0, r = void 0; i < bytes.length; i++) {\n bytes[i] = Math.random() * max;\n }\n}\nexports.getRandomValuesWithMathRandom = getRandomValuesWithMathRandom;\nexports.getRandomValues = (function () {\n if (typeof crypto !== 'undefined') {\n return crypto.getRandomValues.bind(crypto);\n }\n else if (typeof msCrypto !== 'undefined') {\n return msCrypto.getRandomValues.bind(msCrypto);\n }\n else {\n return getRandomValuesWithMathRandom;\n }\n})();\nfunction getRandomBytes(length) {\n var bytes = new Uint8Array(length);\n exports.getRandomValues(bytes);\n return bytes;\n}\nexports.getRandomBytes = getRandomBytes;\n;\n//# sourceMappingURL=rng.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar rng_1 = require(\"./rng\");\nfunction hex(bytes) {\n var s = \"\";\n for (var i = 0; i < bytes.length; i++) {\n s += bytes[i].toString(16).padStart(2, '0');\n }\n return s;\n}\n// https://tools.ietf.org/html/rfc4122\nfunction generateUUIDv4() {\n var bytes = rng_1.getRandomBytes(16);\n // 4.1.1. Variant\n var VARIANT = 2; // \"The variant specified in this document\"\n // 4.1.3. Version\n var VERSION = 4; // \"The randomly or pseudo-randomly generated version specified in this document\"\n bytes[6] = (bytes[6] & 0x0f) | 0x40; // version\n bytes[8] = (bytes[8] & 0xbf) | 0x80; // variant\n return hex(bytes.subarray(0, 4))\n + \"-\" + hex(bytes.subarray(4, 6))\n + \"-\" + hex(bytes.subarray(6, 8))\n + \"-\" + hex(bytes.subarray(8, 10))\n + \"-\" + hex(bytes.subarray(10, 16));\n}\nexports.generateUUIDv4 = generateUUIDv4;\n//# sourceMappingURL=uuid-v4.js.map","/**\n * @licstart The following is the entire license notice for the\n * JavaScript code in this page\n *\n * Copyright 2024 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\n * @licend The above is the entire license notice for the\n * JavaScript code in this page\n */\n\n/******/ // The require scope\n/******/ var __webpack_require__ = {};\n/******/ \n/************************************************************************/\n/******/ /* webpack/runtime/define property getters */\n/******/ (() => {\n/******/ \t// define getter functions for harmony exports\n/******/ \t__webpack_require__.d = (exports, definition) => {\n/******/ \t\tfor(var key in definition) {\n/******/ \t\t\tif(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {\n/******/ \t\t\t\tObject.defineProperty(exports, key, { enumerable: true, get: definition[key] });\n/******/ \t\t\t}\n/******/ \t\t}\n/******/ \t};\n/******/ })();\n/******/ \n/******/ /* webpack/runtime/hasOwnProperty shorthand */\n/******/ (() => {\n/******/ \t__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))\n/******/ })();\n/******/ \n/************************************************************************/\nvar __webpack_exports__ = globalThis.pdfjsLib = {};\n\n// EXPORTS\n__webpack_require__.d(__webpack_exports__, {\n AbortException: () => (/* reexport */ AbortException),\n AnnotationEditorLayer: () => (/* reexport */ AnnotationEditorLayer),\n AnnotationEditorParamsType: () => (/* reexport */ AnnotationEditorParamsType),\n AnnotationEditorType: () => (/* reexport */ AnnotationEditorType),\n AnnotationEditorUIManager: () => (/* reexport */ AnnotationEditorUIManager),\n AnnotationLayer: () => (/* reexport */ AnnotationLayer),\n AnnotationMode: () => (/* reexport */ AnnotationMode),\n ColorPicker: () => (/* reexport */ ColorPicker),\n DOMSVGFactory: () => (/* reexport */ DOMSVGFactory),\n DrawLayer: () => (/* reexport */ DrawLayer),\n FeatureTest: () => (/* reexport */ util_FeatureTest),\n GlobalWorkerOptions: () => (/* reexport */ GlobalWorkerOptions),\n ImageKind: () => (/* reexport */ util_ImageKind),\n InvalidPDFException: () => (/* reexport */ InvalidPDFException),\n MissingPDFException: () => (/* reexport */ MissingPDFException),\n OPS: () => (/* reexport */ OPS),\n OutputScale: () => (/* reexport */ OutputScale),\n PDFDataRangeTransport: () => (/* reexport */ PDFDataRangeTransport),\n PDFDateString: () => (/* reexport */ PDFDateString),\n PDFWorker: () => (/* reexport */ PDFWorker),\n PasswordResponses: () => (/* reexport */ PasswordResponses),\n PermissionFlag: () => (/* reexport */ PermissionFlag),\n PixelsPerInch: () => (/* reexport */ PixelsPerInch),\n RenderingCancelledException: () => (/* reexport */ RenderingCancelledException),\n TextLayer: () => (/* reexport */ TextLayer),\n TouchManager: () => (/* reexport */ TouchManager),\n UnexpectedResponseException: () => (/* reexport */ UnexpectedResponseException),\n Util: () => (/* reexport */ Util),\n VerbosityLevel: () => (/* reexport */ VerbosityLevel),\n XfaLayer: () => (/* reexport */ XfaLayer),\n build: () => (/* reexport */ build),\n createValidAbsoluteUrl: () => (/* reexport */ createValidAbsoluteUrl),\n fetchData: () => (/* reexport */ fetchData),\n getDocument: () => (/* reexport */ getDocument),\n getFilenameFromUrl: () => (/* reexport */ getFilenameFromUrl),\n getPdfFilenameFromUrl: () => (/* reexport */ getPdfFilenameFromUrl),\n getXfaPageViewport: () => (/* reexport */ getXfaPageViewport),\n isDataScheme: () => (/* reexport */ isDataScheme),\n isPdfFile: () => (/* reexport */ isPdfFile),\n noContextMenu: () => (/* reexport */ noContextMenu),\n normalizeUnicode: () => (/* reexport */ normalizeUnicode),\n setLayerDimensions: () => (/* reexport */ setLayerDimensions),\n shadow: () => (/* reexport */ shadow),\n stopEvent: () => (/* reexport */ stopEvent),\n version: () => (/* reexport */ version)\n});\n\n;// ./src/shared/util.js\nconst isNodeJS = typeof process === \"object\" && process + \"\" === \"[object process]\" && !process.versions.nw && !(process.versions.electron && process.type && process.type !== \"browser\");\nconst IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];\nconst FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];\nconst MAX_IMAGE_SIZE_TO_CACHE = 10e6;\nconst LINE_FACTOR = 1.35;\nconst LINE_DESCENT_FACTOR = 0.35;\nconst BASELINE_FACTOR = LINE_DESCENT_FACTOR / LINE_FACTOR;\nconst RenderingIntentFlag = {\n ANY: 0x01,\n DISPLAY: 0x02,\n PRINT: 0x04,\n SAVE: 0x08,\n ANNOTATIONS_FORMS: 0x10,\n ANNOTATIONS_STORAGE: 0x20,\n ANNOTATIONS_DISABLE: 0x40,\n IS_EDITING: 0x80,\n OPLIST: 0x100\n};\nconst AnnotationMode = {\n DISABLE: 0,\n ENABLE: 1,\n ENABLE_FORMS: 2,\n ENABLE_STORAGE: 3\n};\nconst AnnotationEditorPrefix = \"pdfjs_internal_editor_\";\nconst AnnotationEditorType = {\n DISABLE: -1,\n NONE: 0,\n FREETEXT: 3,\n HIGHLIGHT: 9,\n STAMP: 13,\n INK: 15\n};\nconst AnnotationEditorParamsType = {\n RESIZE: 1,\n CREATE: 2,\n FREETEXT_SIZE: 11,\n FREETEXT_COLOR: 12,\n FREETEXT_OPACITY: 13,\n INK_COLOR: 21,\n INK_THICKNESS: 22,\n INK_OPACITY: 23,\n HIGHLIGHT_COLOR: 31,\n HIGHLIGHT_DEFAULT_COLOR: 32,\n HIGHLIGHT_THICKNESS: 33,\n HIGHLIGHT_FREE: 34,\n HIGHLIGHT_SHOW_ALL: 35,\n DRAW_STEP: 41\n};\nconst PermissionFlag = {\n PRINT: 0x04,\n MODIFY_CONTENTS: 0x08,\n COPY: 0x10,\n MODIFY_ANNOTATIONS: 0x20,\n FILL_INTERACTIVE_FORMS: 0x100,\n COPY_FOR_ACCESSIBILITY: 0x200,\n ASSEMBLE: 0x400,\n PRINT_HIGH_QUALITY: 0x800\n};\nconst TextRenderingMode = {\n FILL: 0,\n STROKE: 1,\n FILL_STROKE: 2,\n INVISIBLE: 3,\n FILL_ADD_TO_PATH: 4,\n STROKE_ADD_TO_PATH: 5,\n FILL_STROKE_ADD_TO_PATH: 6,\n ADD_TO_PATH: 7,\n FILL_STROKE_MASK: 3,\n ADD_TO_PATH_FLAG: 4\n};\nconst util_ImageKind = {\n GRAYSCALE_1BPP: 1,\n RGB_24BPP: 2,\n RGBA_32BPP: 3\n};\nconst AnnotationType = {\n TEXT: 1,\n LINK: 2,\n FREETEXT: 3,\n LINE: 4,\n SQUARE: 5,\n CIRCLE: 6,\n POLYGON: 7,\n POLYLINE: 8,\n HIGHLIGHT: 9,\n UNDERLINE: 10,\n SQUIGGLY: 11,\n STRIKEOUT: 12,\n STAMP: 13,\n CARET: 14,\n INK: 15,\n POPUP: 16,\n FILEATTACHMENT: 17,\n SOUND: 18,\n MOVIE: 19,\n WIDGET: 20,\n SCREEN: 21,\n PRINTERMARK: 22,\n TRAPNET: 23,\n WATERMARK: 24,\n THREED: 25,\n REDACT: 26\n};\nconst AnnotationReplyType = {\n GROUP: \"Group\",\n REPLY: \"R\"\n};\nconst AnnotationFlag = {\n INVISIBLE: 0x01,\n HIDDEN: 0x02,\n PRINT: 0x04,\n NOZOOM: 0x08,\n NOROTATE: 0x10,\n NOVIEW: 0x20,\n READONLY: 0x40,\n LOCKED: 0x80,\n TOGGLENOVIEW: 0x100,\n LOCKEDCONTENTS: 0x200\n};\nconst AnnotationFieldFlag = {\n READONLY: 0x0000001,\n REQUIRED: 0x0000002,\n NOEXPORT: 0x0000004,\n MULTILINE: 0x0001000,\n PASSWORD: 0x0002000,\n NOTOGGLETOOFF: 0x0004000,\n RADIO: 0x0008000,\n PUSHBUTTON: 0x0010000,\n COMBO: 0x0020000,\n EDIT: 0x0040000,\n SORT: 0x0080000,\n FILESELECT: 0x0100000,\n MULTISELECT: 0x0200000,\n DONOTSPELLCHECK: 0x0400000,\n DONOTSCROLL: 0x0800000,\n COMB: 0x1000000,\n RICHTEXT: 0x2000000,\n RADIOSINUNISON: 0x2000000,\n COMMITONSELCHANGE: 0x4000000\n};\nconst AnnotationBorderStyleType = {\n SOLID: 1,\n DASHED: 2,\n BEVELED: 3,\n INSET: 4,\n UNDERLINE: 5\n};\nconst AnnotationActionEventType = {\n E: \"Mouse Enter\",\n X: \"Mouse Exit\",\n D: \"Mouse Down\",\n U: \"Mouse Up\",\n Fo: \"Focus\",\n Bl: \"Blur\",\n PO: \"PageOpen\",\n PC: \"PageClose\",\n PV: \"PageVisible\",\n PI: \"PageInvisible\",\n K: \"Keystroke\",\n F: \"Format\",\n V: \"Validate\",\n C: \"Calculate\"\n};\nconst DocumentActionEventType = {\n WC: \"WillClose\",\n WS: \"WillSave\",\n DS: \"DidSave\",\n WP: \"WillPrint\",\n DP: \"DidPrint\"\n};\nconst PageActionEventType = {\n O: \"PageOpen\",\n C: \"PageClose\"\n};\nconst VerbosityLevel = {\n ERRORS: 0,\n WARNINGS: 1,\n INFOS: 5\n};\nconst OPS = {\n dependency: 1,\n setLineWidth: 2,\n setLineCap: 3,\n setLineJoin: 4,\n setMiterLimit: 5,\n setDash: 6,\n setRenderingIntent: 7,\n setFlatness: 8,\n setGState: 9,\n save: 10,\n restore: 11,\n transform: 12,\n moveTo: 13,\n lineTo: 14,\n curveTo: 15,\n curveTo2: 16,\n curveTo3: 17,\n closePath: 18,\n rectangle: 19,\n stroke: 20,\n closeStroke: 21,\n fill: 22,\n eoFill: 23,\n fillStroke: 24,\n eoFillStroke: 25,\n closeFillStroke: 26,\n closeEOFillStroke: 27,\n endPath: 28,\n clip: 29,\n eoClip: 30,\n beginText: 31,\n endText: 32,\n setCharSpacing: 33,\n setWordSpacing: 34,\n setHScale: 35,\n setLeading: 36,\n setFont: 37,\n setTextRenderingMode: 38,\n setTextRise: 39,\n moveText: 40,\n setLeadingMoveText: 41,\n setTextMatrix: 42,\n nextLine: 43,\n showText: 44,\n showSpacedText: 45,\n nextLineShowText: 46,\n nextLineSetSpacingShowText: 47,\n setCharWidth: 48,\n setCharWidthAndBounds: 49,\n setStrokeColorSpace: 50,\n setFillColorSpace: 51,\n setStrokeColor: 52,\n setStrokeColorN: 53,\n setFillColor: 54,\n setFillColorN: 55,\n setStrokeGray: 56,\n setFillGray: 57,\n setStrokeRGBColor: 58,\n setFillRGBColor: 59,\n setStrokeCMYKColor: 60,\n setFillCMYKColor: 61,\n shadingFill: 62,\n beginInlineImage: 63,\n beginImageData: 64,\n endInlineImage: 65,\n paintXObject: 66,\n markPoint: 67,\n markPointProps: 68,\n beginMarkedContent: 69,\n beginMarkedContentProps: 70,\n endMarkedContent: 71,\n beginCompat: 72,\n endCompat: 73,\n paintFormXObjectBegin: 74,\n paintFormXObjectEnd: 75,\n beginGroup: 76,\n endGroup: 77,\n beginAnnotation: 80,\n endAnnotation: 81,\n paintImageMaskXObject: 83,\n paintImageMaskXObjectGroup: 84,\n paintImageXObject: 85,\n paintInlineImageXObject: 86,\n paintInlineImageXObjectGroup: 87,\n paintImageXObjectRepeat: 88,\n paintImageMaskXObjectRepeat: 89,\n paintSolidColorImageMask: 90,\n constructPath: 91,\n setStrokeTransparent: 92,\n setFillTransparent: 93\n};\nconst PasswordResponses = {\n NEED_PASSWORD: 1,\n INCORRECT_PASSWORD: 2\n};\nlet verbosity = VerbosityLevel.WARNINGS;\nfunction setVerbosityLevel(level) {\n if (Number.isInteger(level)) {\n verbosity = level;\n }\n}\nfunction getVerbosityLevel() {\n return verbosity;\n}\nfunction info(msg) {\n if (verbosity >= VerbosityLevel.INFOS) {\n console.log(`Info: ${msg}`);\n }\n}\nfunction warn(msg) {\n if (verbosity >= VerbosityLevel.WARNINGS) {\n console.log(`Warning: ${msg}`);\n }\n}\nfunction unreachable(msg) {\n throw new Error(msg);\n}\nfunction assert(cond, msg) {\n if (!cond) {\n unreachable(msg);\n }\n}\nfunction _isValidProtocol(url) {\n switch (url?.protocol) {\n case \"http:\":\n case \"https:\":\n case \"ftp:\":\n case \"mailto:\":\n case \"tel:\":\n return true;\n default:\n return false;\n }\n}\nfunction createValidAbsoluteUrl(url, baseUrl = null, options = null) {\n if (!url) {\n return null;\n }\n try {\n if (options && typeof url === \"string\") {\n if (options.addDefaultProtocol && url.startsWith(\"www.\")) {\n const dots = url.match(/\\./g);\n if (dots?.length >= 2) {\n url = `http://${url}`;\n }\n }\n if (options.tryConvertEncoding) {\n try {\n url = stringToUTF8String(url);\n } catch {}\n }\n }\n const absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);\n if (_isValidProtocol(absoluteUrl)) {\n return absoluteUrl;\n }\n } catch {}\n return null;\n}\nfunction shadow(obj, prop, value, nonSerializable = false) {\n Object.defineProperty(obj, prop, {\n value,\n enumerable: !nonSerializable,\n configurable: true,\n writable: false\n });\n return value;\n}\nconst BaseException = function BaseExceptionClosure() {\n function BaseException(message, name) {\n this.message = message;\n this.name = name;\n }\n BaseException.prototype = new Error();\n BaseException.constructor = BaseException;\n return BaseException;\n}();\nclass PasswordException extends BaseException {\n constructor(msg, code) {\n super(msg, \"PasswordException\");\n this.code = code;\n }\n}\nclass UnknownErrorException extends BaseException {\n constructor(msg, details) {\n super(msg, \"UnknownErrorException\");\n this.details = details;\n }\n}\nclass InvalidPDFException extends BaseException {\n constructor(msg) {\n super(msg, \"InvalidPDFException\");\n }\n}\nclass MissingPDFException extends BaseException {\n constructor(msg) {\n super(msg, \"MissingPDFException\");\n }\n}\nclass UnexpectedResponseException extends BaseException {\n constructor(msg, status) {\n super(msg, \"UnexpectedResponseException\");\n this.status = status;\n }\n}\nclass FormatError extends BaseException {\n constructor(msg) {\n super(msg, \"FormatError\");\n }\n}\nclass AbortException extends BaseException {\n constructor(msg) {\n super(msg, \"AbortException\");\n }\n}\nfunction bytesToString(bytes) {\n if (typeof bytes !== \"object\" || bytes?.length === undefined) {\n unreachable(\"Invalid argument for bytesToString\");\n }\n const length = bytes.length;\n const MAX_ARGUMENT_COUNT = 8192;\n if (length < MAX_ARGUMENT_COUNT) {\n return String.fromCharCode.apply(null, bytes);\n }\n const strBuf = [];\n for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {\n const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);\n const chunk = bytes.subarray(i, chunkEnd);\n strBuf.push(String.fromCharCode.apply(null, chunk));\n }\n return strBuf.join(\"\");\n}\nfunction stringToBytes(str) {\n if (typeof str !== \"string\") {\n unreachable(\"Invalid argument for stringToBytes\");\n }\n const length = str.length;\n const bytes = new Uint8Array(length);\n for (let i = 0; i < length; ++i) {\n bytes[i] = str.charCodeAt(i) & 0xff;\n }\n return bytes;\n}\nfunction string32(value) {\n return String.fromCharCode(value >> 24 & 0xff, value >> 16 & 0xff, value >> 8 & 0xff, value & 0xff);\n}\nfunction objectSize(obj) {\n return Object.keys(obj).length;\n}\nfunction objectFromMap(map) {\n const obj = Object.create(null);\n for (const [key, value] of map) {\n obj[key] = value;\n }\n return obj;\n}\nfunction isLittleEndian() {\n const buffer8 = new Uint8Array(4);\n buffer8[0] = 1;\n const view32 = new Uint32Array(buffer8.buffer, 0, 1);\n return view32[0] === 1;\n}\nfunction isEvalSupported() {\n try {\n new Function(\"\");\n return true;\n } catch {\n return false;\n }\n}\nclass util_FeatureTest {\n static get isLittleEndian() {\n return shadow(this, \"isLittleEndian\", isLittleEndian());\n }\n static get isEvalSupported() {\n return shadow(this, \"isEvalSupported\", isEvalSupported());\n }\n static get isOffscreenCanvasSupported() {\n return shadow(this, \"isOffscreenCanvasSupported\", typeof OffscreenCanvas !== \"undefined\");\n }\n static get isImageDecoderSupported() {\n return shadow(this, \"isImageDecoderSupported\", typeof ImageDecoder !== \"undefined\");\n }\n static get platform() {\n if (typeof navigator !== \"undefined\" && typeof navigator?.platform === \"string\") {\n return shadow(this, \"platform\", {\n isMac: navigator.platform.includes(\"Mac\"),\n isWindows: navigator.platform.includes(\"Win\"),\n isFirefox: typeof navigator?.userAgent === \"string\" && navigator.userAgent.includes(\"Firefox\")\n });\n }\n return shadow(this, \"platform\", {\n isMac: false,\n isWindows: false,\n isFirefox: false\n });\n }\n static get isCSSRoundSupported() {\n return shadow(this, \"isCSSRoundSupported\", globalThis.CSS?.supports?.(\"width: round(1.5px, 1px)\"));\n }\n}\nconst hexNumbers = Array.from(Array(256).keys(), n => n.toString(16).padStart(2, \"0\"));\nclass Util {\n static makeHexColor(r, g, b) {\n return `#${hexNumbers[r]}${hexNumbers[g]}${hexNumbers[b]}`;\n }\n static scaleMinMax(transform, minMax) {\n let temp;\n if (transform[0]) {\n if (transform[0] < 0) {\n temp = minMax[0];\n minMax[0] = minMax[2];\n minMax[2] = temp;\n }\n minMax[0] *= transform[0];\n minMax[2] *= transform[0];\n if (transform[3] < 0) {\n temp = minMax[1];\n minMax[1] = minMax[3];\n minMax[3] = temp;\n }\n minMax[1] *= transform[3];\n minMax[3] *= transform[3];\n } else {\n temp = minMax[0];\n minMax[0] = minMax[1];\n minMax[1] = temp;\n temp = minMax[2];\n minMax[2] = minMax[3];\n minMax[3] = temp;\n if (transform[1] < 0) {\n temp = minMax[1];\n minMax[1] = minMax[3];\n minMax[3] = temp;\n }\n minMax[1] *= transform[1];\n minMax[3] *= transform[1];\n if (transform[2] < 0) {\n temp = minMax[0];\n minMax[0] = minMax[2];\n minMax[2] = temp;\n }\n minMax[0] *= transform[2];\n minMax[2] *= transform[2];\n }\n minMax[0] += transform[4];\n minMax[1] += transform[5];\n minMax[2] += transform[4];\n minMax[3] += transform[5];\n }\n static transform(m1, m2) {\n return [m1[0] * m2[0] + m1[2] * m2[1], m1[1] * m2[0] + m1[3] * m2[1], m1[0] * m2[2] + m1[2] * m2[3], m1[1] * m2[2] + m1[3] * m2[3], m1[0] * m2[4] + m1[2] * m2[5] + m1[4], m1[1] * m2[4] + m1[3] * m2[5] + m1[5]];\n }\n static applyTransform(p, m) {\n const xt = p[0] * m[0] + p[1] * m[2] + m[4];\n const yt = p[0] * m[1] + p[1] * m[3] + m[5];\n return [xt, yt];\n }\n static applyInverseTransform(p, m) {\n const d = m[0] * m[3] - m[1] * m[2];\n const xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;\n const yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;\n return [xt, yt];\n }\n static getAxialAlignedBoundingBox(r, m) {\n const p1 = this.applyTransform(r, m);\n const p2 = this.applyTransform(r.slice(2, 4), m);\n const p3 = this.applyTransform([r[0], r[3]], m);\n const p4 = this.applyTransform([r[2], r[1]], m);\n return [Math.min(p1[0], p2[0], p3[0], p4[0]), Math.min(p1[1], p2[1], p3[1], p4[1]), Math.max(p1[0], p2[0], p3[0], p4[0]), Math.max(p1[1], p2[1], p3[1], p4[1])];\n }\n static inverseTransform(m) {\n const d = m[0] * m[3] - m[1] * m[2];\n return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];\n }\n static singularValueDecompose2dScale(m) {\n const transpose = [m[0], m[2], m[1], m[3]];\n const a = m[0] * transpose[0] + m[1] * transpose[2];\n const b = m[0] * transpose[1] + m[1] * transpose[3];\n const c = m[2] * transpose[0] + m[3] * transpose[2];\n const d = m[2] * transpose[1] + m[3] * transpose[3];\n const first = (a + d) / 2;\n const second = Math.sqrt((a + d) ** 2 - 4 * (a * d - c * b)) / 2;\n const sx = first + second || 1;\n const sy = first - second || 1;\n return [Math.sqrt(sx), Math.sqrt(sy)];\n }\n static normalizeRect(rect) {\n const r = rect.slice(0);\n if (rect[0] > rect[2]) {\n r[0] = rect[2];\n r[2] = rect[0];\n }\n if (rect[1] > rect[3]) {\n r[1] = rect[3];\n r[3] = rect[1];\n }\n return r;\n }\n static intersect(rect1, rect2) {\n const xLow = Math.max(Math.min(rect1[0], rect1[2]), Math.min(rect2[0], rect2[2]));\n const xHigh = Math.min(Math.max(rect1[0], rect1[2]), Math.max(rect2[0], rect2[2]));\n if (xLow > xHigh) {\n return null;\n }\n const yLow = Math.max(Math.min(rect1[1], rect1[3]), Math.min(rect2[1], rect2[3]));\n const yHigh = Math.min(Math.max(rect1[1], rect1[3]), Math.max(rect2[1], rect2[3]));\n if (yLow > yHigh) {\n return null;\n }\n return [xLow, yLow, xHigh, yHigh];\n }\n static #getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, t, minMax) {\n if (t <= 0 || t >= 1) {\n return;\n }\n const mt = 1 - t;\n const tt = t * t;\n const ttt = tt * t;\n const x = mt * (mt * (mt * x0 + 3 * t * x1) + 3 * tt * x2) + ttt * x3;\n const y = mt * (mt * (mt * y0 + 3 * t * y1) + 3 * tt * y2) + ttt * y3;\n minMax[0] = Math.min(minMax[0], x);\n minMax[1] = Math.min(minMax[1], y);\n minMax[2] = Math.max(minMax[2], x);\n minMax[3] = Math.max(minMax[3], y);\n }\n static #getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, a, b, c, minMax) {\n if (Math.abs(a) < 1e-12) {\n if (Math.abs(b) >= 1e-12) {\n this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, -c / b, minMax);\n }\n return;\n }\n const delta = b ** 2 - 4 * c * a;\n if (delta < 0) {\n return;\n }\n const sqrtDelta = Math.sqrt(delta);\n const a2 = 2 * a;\n this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, (-b + sqrtDelta) / a2, minMax);\n this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, (-b - sqrtDelta) / a2, minMax);\n }\n static bezierBoundingBox(x0, y0, x1, y1, x2, y2, x3, y3, minMax) {\n if (minMax) {\n minMax[0] = Math.min(minMax[0], x0, x3);\n minMax[1] = Math.min(minMax[1], y0, y3);\n minMax[2] = Math.max(minMax[2], x0, x3);\n minMax[3] = Math.max(minMax[3], y0, y3);\n } else {\n minMax = [Math.min(x0, x3), Math.min(y0, y3), Math.max(x0, x3), Math.max(y0, y3)];\n }\n this.#getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, 3 * (-x0 + 3 * (x1 - x2) + x3), 6 * (x0 - 2 * x1 + x2), 3 * (x1 - x0), minMax);\n this.#getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, 3 * (-y0 + 3 * (y1 - y2) + y3), 6 * (y0 - 2 * y1 + y2), 3 * (y1 - y0), minMax);\n return minMax;\n }\n}\nconst PDFStringTranslateTable = (/* unused pure expression or super */ null && ([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2d8, 0x2c7, 0x2c6, 0x2d9, 0x2dd, 0x2db, 0x2da, 0x2dc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x192, 0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018, 0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x141, 0x152, 0x160, 0x178, 0x17d, 0x131, 0x142, 0x153, 0x161, 0x17e, 0, 0x20ac]));\nfunction stringToPDFString(str) {\n if (str[0] >= \"\\xEF\") {\n let encoding;\n if (str[0] === \"\\xFE\" && str[1] === \"\\xFF\") {\n encoding = \"utf-16be\";\n if (str.length % 2 === 1) {\n str = str.slice(0, -1);\n }\n } else if (str[0] === \"\\xFF\" && str[1] === \"\\xFE\") {\n encoding = \"utf-16le\";\n if (str.length % 2 === 1) {\n str = str.slice(0, -1);\n }\n } else if (str[0] === \"\\xEF\" && str[1] === \"\\xBB\" && str[2] === \"\\xBF\") {\n encoding = \"utf-8\";\n }\n if (encoding) {\n try {\n const decoder = new TextDecoder(encoding, {\n fatal: true\n });\n const buffer = stringToBytes(str);\n const decoded = decoder.decode(buffer);\n if (!decoded.includes(\"\\x1b\")) {\n return decoded;\n }\n return decoded.replaceAll(/\\x1b[^\\x1b]*(?:\\x1b|$)/g, \"\");\n } catch (ex) {\n warn(`stringToPDFString: \"${ex}\".`);\n }\n }\n }\n const strBuf = [];\n for (let i = 0, ii = str.length; i < ii; i++) {\n const charCode = str.charCodeAt(i);\n if (charCode === 0x1b) {\n while (++i < ii && str.charCodeAt(i) !== 0x1b) {}\n continue;\n }\n const code = PDFStringTranslateTable[charCode];\n strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));\n }\n return strBuf.join(\"\");\n}\nfunction stringToUTF8String(str) {\n return decodeURIComponent(escape(str));\n}\nfunction utf8StringToString(str) {\n return unescape(encodeURIComponent(str));\n}\nfunction isArrayEqual(arr1, arr2) {\n if (arr1.length !== arr2.length) {\n return false;\n }\n for (let i = 0, ii = arr1.length; i < ii; i++) {\n if (arr1[i] !== arr2[i]) {\n return false;\n }\n }\n return true;\n}\nfunction getModificationDate(date = new Date()) {\n const buffer = [date.getUTCFullYear().toString(), (date.getUTCMonth() + 1).toString().padStart(2, \"0\"), date.getUTCDate().toString().padStart(2, \"0\"), date.getUTCHours().toString().padStart(2, \"0\"), date.getUTCMinutes().toString().padStart(2, \"0\"), date.getUTCSeconds().toString().padStart(2, \"0\")];\n return buffer.join(\"\");\n}\nlet NormalizeRegex = null;\nlet NormalizationMap = null;\nfunction normalizeUnicode(str) {\n if (!NormalizeRegex) {\n NormalizeRegex = /([\\u00a0\\u00b5\\u037e\\u0eb3\\u2000-\\u200a\\u202f\\u2126\\ufb00-\\ufb04\\ufb06\\ufb20-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40-\\ufb41\\ufb43-\\ufb44\\ufb46-\\ufba1\\ufba4-\\ufba9\\ufbae-\\ufbb1\\ufbd3-\\ufbdc\\ufbde-\\ufbe7\\ufbea-\\ufbf8\\ufbfc-\\ufbfd\\ufc00-\\ufc5d\\ufc64-\\ufcf1\\ufcf5-\\ufd3d\\ufd88\\ufdf4\\ufdfa-\\ufdfb\\ufe71\\ufe77\\ufe79\\ufe7b\\ufe7d]+)|(\\ufb05+)/gu;\n NormalizationMap = new Map([[\"ſt\", \"ſt\"]]);\n }\n return str.replaceAll(NormalizeRegex, (_, p1, p2) => p1 ? p1.normalize(\"NFKC\") : NormalizationMap.get(p2));\n}\nfunction getUuid() {\n if (typeof crypto.randomUUID === \"function\") {\n return crypto.randomUUID();\n }\n const buf = new Uint8Array(32);\n crypto.getRandomValues(buf);\n return bytesToString(buf);\n}\nconst AnnotationPrefix = \"pdfjs_internal_id_\";\nfunction toHexUtil(arr) {\n if (Uint8Array.prototype.toHex) {\n return arr.toHex();\n }\n return Array.from(arr, num => hexNumbers[num]).join(\"\");\n}\nfunction toBase64Util(arr) {\n if (Uint8Array.prototype.toBase64) {\n return arr.toBase64();\n }\n return btoa(bytesToString(arr));\n}\nfunction fromBase64Util(str) {\n if (Uint8Array.fromBase64) {\n return Uint8Array.fromBase64(str);\n }\n return stringToBytes(atob(str));\n}\nif (typeof Promise.try !== \"function\") {\n Promise.try = function (fn, ...args) {\n return new Promise(resolve => {\n resolve(fn(...args));\n });\n };\n}\n\n;// ./src/display/display_utils.js\n\nconst SVG_NS = \"http://www.w3.org/2000/svg\";\nclass PixelsPerInch {\n static CSS = 96.0;\n static PDF = 72.0;\n static PDF_TO_CSS_UNITS = this.CSS / this.PDF;\n}\nasync function fetchData(url, type = \"text\") {\n if (isValidFetchUrl(url, document.baseURI)) {\n const response = await fetch(url);\n if (!response.ok) {\n throw new Error(response.statusText);\n }\n switch (type) {\n case \"arraybuffer\":\n return response.arrayBuffer();\n case \"blob\":\n return response.blob();\n case \"json\":\n return response.json();\n }\n return response.text();\n }\n return new Promise((resolve, reject) => {\n const request = new XMLHttpRequest();\n request.open(\"GET\", url, true);\n request.responseType = type;\n request.onreadystatechange = () => {\n if (request.readyState !== XMLHttpRequest.DONE) {\n return;\n }\n if (request.status === 200 || request.status === 0) {\n switch (type) {\n case \"arraybuffer\":\n case \"blob\":\n case \"json\":\n resolve(request.response);\n return;\n }\n resolve(request.responseText);\n return;\n }\n reject(new Error(request.statusText));\n };\n request.send(null);\n });\n}\nclass PageViewport {\n constructor({\n viewBox,\n userUnit,\n scale,\n rotation,\n offsetX = 0,\n offsetY = 0,\n dontFlip = false\n }) {\n this.viewBox = viewBox;\n this.userUnit = userUnit;\n this.scale = scale;\n this.rotation = rotation;\n this.offsetX = offsetX;\n this.offsetY = offsetY;\n scale *= userUnit;\n const centerX = (viewBox[2] + viewBox[0]) / 2;\n const centerY = (viewBox[3] + viewBox[1]) / 2;\n let rotateA, rotateB, rotateC, rotateD;\n rotation %= 360;\n if (rotation < 0) {\n rotation += 360;\n }\n switch (rotation) {\n case 180:\n rotateA = -1;\n rotateB = 0;\n rotateC = 0;\n rotateD = 1;\n break;\n case 90:\n rotateA = 0;\n rotateB = 1;\n rotateC = 1;\n rotateD = 0;\n break;\n case 270:\n rotateA = 0;\n rotateB = -1;\n rotateC = -1;\n rotateD = 0;\n break;\n case 0:\n rotateA = 1;\n rotateB = 0;\n rotateC = 0;\n rotateD = -1;\n break;\n default:\n throw new Error(\"PageViewport: Invalid rotation, must be a multiple of 90 degrees.\");\n }\n if (dontFlip) {\n rotateC = -rotateC;\n rotateD = -rotateD;\n }\n let offsetCanvasX, offsetCanvasY;\n let width, height;\n if (rotateA === 0) {\n offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;\n offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;\n width = (viewBox[3] - viewBox[1]) * scale;\n height = (viewBox[2] - viewBox[0]) * scale;\n } else {\n offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;\n offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;\n width = (viewBox[2] - viewBox[0]) * scale;\n height = (viewBox[3] - viewBox[1]) * scale;\n }\n this.transform = [rotateA * scale, rotateB * scale, rotateC * scale, rotateD * scale, offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY];\n this.width = width;\n this.height = height;\n }\n get rawDims() {\n const {\n userUnit,\n viewBox\n } = this;\n const dims = viewBox.map(x => x * userUnit);\n return shadow(this, \"rawDims\", {\n pageWidth: dims[2] - dims[0],\n pageHeight: dims[3] - dims[1],\n pageX: dims[0],\n pageY: dims[1]\n });\n }\n clone({\n scale = this.scale,\n rotation = this.rotation,\n offsetX = this.offsetX,\n offsetY = this.offsetY,\n dontFlip = false\n } = {}) {\n return new PageViewport({\n viewBox: this.viewBox.slice(),\n userUnit: this.userUnit,\n scale,\n rotation,\n offsetX,\n offsetY,\n dontFlip\n });\n }\n convertToViewportPoint(x, y) {\n return Util.applyTransform([x, y], this.transform);\n }\n convertToViewportRectangle(rect) {\n const topLeft = Util.applyTransform([rect[0], rect[1]], this.transform);\n const bottomRight = Util.applyTransform([rect[2], rect[3]], this.transform);\n return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];\n }\n convertToPdfPoint(x, y) {\n return Util.applyInverseTransform([x, y], this.transform);\n }\n}\nclass RenderingCancelledException extends BaseException {\n constructor(msg, extraDelay = 0) {\n super(msg, \"RenderingCancelledException\");\n this.extraDelay = extraDelay;\n }\n}\nfunction isDataScheme(url) {\n const ii = url.length;\n let i = 0;\n while (i < ii && url[i].trim() === \"\") {\n i++;\n }\n return url.substring(i, i + 5).toLowerCase() === \"data:\";\n}\nfunction isPdfFile(filename) {\n return typeof filename === \"string\" && /\\.pdf$/i.test(filename);\n}\nfunction getFilenameFromUrl(url) {\n [url] = url.split(/[#?]/, 1);\n return url.substring(url.lastIndexOf(\"/\") + 1);\n}\nfunction getPdfFilenameFromUrl(url, defaultFilename = \"document.pdf\") {\n if (typeof url !== \"string\") {\n return defaultFilename;\n }\n if (isDataScheme(url)) {\n warn('getPdfFilenameFromUrl: ignore \"data:\"-URL for performance reasons.');\n return defaultFilename;\n }\n const reURI = /^(?:(?:[^:]+:)?\\/\\/[^/]+)?([^?#]*)(\\?[^#]*)?(#.*)?$/;\n const reFilename = /[^/?#=]+\\.pdf\\b(?!.*\\.pdf\\b)/i;\n const splitURI = reURI.exec(url);\n let suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3]);\n if (suggestedFilename) {\n suggestedFilename = suggestedFilename[0];\n if (suggestedFilename.includes(\"%\")) {\n try {\n suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0];\n } catch {}\n }\n }\n return suggestedFilename || defaultFilename;\n}\nclass StatTimer {\n started = Object.create(null);\n times = [];\n time(name) {\n if (name in this.started) {\n warn(`Timer is already running for ${name}`);\n }\n this.started[name] = Date.now();\n }\n timeEnd(name) {\n if (!(name in this.started)) {\n warn(`Timer has not been started for ${name}`);\n }\n this.times.push({\n name,\n start: this.started[name],\n end: Date.now()\n });\n delete this.started[name];\n }\n toString() {\n const outBuf = [];\n let longest = 0;\n for (const {\n name\n } of this.times) {\n longest = Math.max(name.length, longest);\n }\n for (const {\n name,\n start,\n end\n } of this.times) {\n outBuf.push(`${name.padEnd(longest)} ${end - start}ms\\n`);\n }\n return outBuf.join(\"\");\n }\n}\nfunction isValidFetchUrl(url, baseUrl) {\n try {\n const {\n protocol\n } = baseUrl ? new URL(url, baseUrl) : new URL(url);\n return protocol === \"http:\" || protocol === \"https:\";\n } catch {\n return false;\n }\n}\nfunction noContextMenu(e) {\n e.preventDefault();\n}\nfunction stopEvent(e) {\n e.preventDefault();\n e.stopPropagation();\n}\nfunction deprecated(details) {\n console.log(\"Deprecated API usage: \" + details);\n}\nclass PDFDateString {\n static #regex;\n static toDateObject(input) {\n if (!input || typeof input !== \"string\") {\n return null;\n }\n this.#regex ||= new RegExp(\"^D:\" + \"(\\\\d{4})\" + \"(\\\\d{2})?\" + \"(\\\\d{2})?\" + \"(\\\\d{2})?\" + \"(\\\\d{2})?\" + \"(\\\\d{2})?\" + \"([Z|+|-])?\" + \"(\\\\d{2})?\" + \"'?\" + \"(\\\\d{2})?\" + \"'?\");\n const matches = this.#regex.exec(input);\n if (!matches) {\n return null;\n }\n const year = parseInt(matches[1], 10);\n let month = parseInt(matches[2], 10);\n month = month >= 1 && month <= 12 ? month - 1 : 0;\n let day = parseInt(matches[3], 10);\n day = day >= 1 && day <= 31 ? day : 1;\n let hour = parseInt(matches[4], 10);\n hour = hour >= 0 && hour <= 23 ? hour : 0;\n let minute = parseInt(matches[5], 10);\n minute = minute >= 0 && minute <= 59 ? minute : 0;\n let second = parseInt(matches[6], 10);\n second = second >= 0 && second <= 59 ? second : 0;\n const universalTimeRelation = matches[7] || \"Z\";\n let offsetHour = parseInt(matches[8], 10);\n offsetHour = offsetHour >= 0 && offsetHour <= 23 ? offsetHour : 0;\n let offsetMinute = parseInt(matches[9], 10) || 0;\n offsetMinute = offsetMinute >= 0 && offsetMinute <= 59 ? offsetMinute : 0;\n if (universalTimeRelation === \"-\") {\n hour += offsetHour;\n minute += offsetMinute;\n } else if (universalTimeRelation === \"+\") {\n hour -= offsetHour;\n minute -= offsetMinute;\n }\n return new Date(Date.UTC(year, month, day, hour, minute, second));\n }\n}\nfunction getXfaPageViewport(xfaPage, {\n scale = 1,\n rotation = 0\n}) {\n const {\n width,\n height\n } = xfaPage.attributes.style;\n const viewBox = [0, 0, parseInt(width), parseInt(height)];\n return new PageViewport({\n viewBox,\n userUnit: 1,\n scale,\n rotation\n });\n}\nfunction getRGB(color) {\n if (color.startsWith(\"#\")) {\n const colorRGB = parseInt(color.slice(1), 16);\n return [(colorRGB & 0xff0000) >> 16, (colorRGB & 0x00ff00) >> 8, colorRGB & 0x0000ff];\n }\n if (color.startsWith(\"rgb(\")) {\n return color.slice(4, -1).split(\",\").map(x => parseInt(x));\n }\n if (color.startsWith(\"rgba(\")) {\n return color.slice(5, -1).split(\",\").map(x => parseInt(x)).slice(0, 3);\n }\n warn(`Not a valid color format: \"${color}\"`);\n return [0, 0, 0];\n}\nfunction getColorValues(colors) {\n const span = document.createElement(\"span\");\n span.style.visibility = \"hidden\";\n document.body.append(span);\n for (const name of colors.keys()) {\n span.style.color = name;\n const computedColor = window.getComputedStyle(span).color;\n colors.set(name, getRGB(computedColor));\n }\n span.remove();\n}\nfunction getCurrentTransform(ctx) {\n const {\n a,\n b,\n c,\n d,\n e,\n f\n } = ctx.getTransform();\n return [a, b, c, d, e, f];\n}\nfunction getCurrentTransformInverse(ctx) {\n const {\n a,\n b,\n c,\n d,\n e,\n f\n } = ctx.getTransform().invertSelf();\n return [a, b, c, d, e, f];\n}\nfunction setLayerDimensions(div, viewport, mustFlip = false, mustRotate = true) {\n if (viewport instanceof PageViewport) {\n const {\n pageWidth,\n pageHeight\n } = viewport.rawDims;\n const {\n style\n } = div;\n const useRound = util_FeatureTest.isCSSRoundSupported;\n const w = `var(--scale-factor) * ${pageWidth}px`,\n h = `var(--scale-factor) * ${pageHeight}px`;\n const widthStr = useRound ? `round(down, ${w}, var(--scale-round-x, 1px))` : `calc(${w})`,\n heightStr = useRound ? `round(down, ${h}, var(--scale-round-y, 1px))` : `calc(${h})`;\n if (!mustFlip || viewport.rotation % 180 === 0) {\n style.width = widthStr;\n style.height = heightStr;\n } else {\n style.width = heightStr;\n style.height = widthStr;\n }\n }\n if (mustRotate) {\n div.setAttribute(\"data-main-rotation\", viewport.rotation);\n }\n}\nclass OutputScale {\n constructor() {\n const pixelRatio = window.devicePixelRatio || 1;\n this.sx = pixelRatio;\n this.sy = pixelRatio;\n }\n get scaled() {\n return this.sx !== 1 || this.sy !== 1;\n }\n get symmetric() {\n return this.sx === this.sy;\n }\n}\n\n;// ./src/display/editor/toolbar.js\n\nclass EditorToolbar {\n #toolbar = null;\n #colorPicker = null;\n #editor;\n #buttons = null;\n #altText = null;\n static #l10nRemove = null;\n constructor(editor) {\n this.#editor = editor;\n EditorToolbar.#l10nRemove ||= Object.freeze({\n freetext: \"pdfjs-editor-remove-freetext-button\",\n highlight: \"pdfjs-editor-remove-highlight-button\",\n ink: \"pdfjs-editor-remove-ink-button\",\n stamp: \"pdfjs-editor-remove-stamp-button\"\n });\n }\n render() {\n const editToolbar = this.#toolbar = document.createElement(\"div\");\n editToolbar.classList.add(\"editToolbar\", \"hidden\");\n editToolbar.setAttribute(\"role\", \"toolbar\");\n const signal = this.#editor._uiManager._signal;\n editToolbar.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n editToolbar.addEventListener(\"pointerdown\", EditorToolbar.#pointerDown, {\n signal\n });\n const buttons = this.#buttons = document.createElement(\"div\");\n buttons.className = \"buttons\";\n editToolbar.append(buttons);\n const position = this.#editor.toolbarPosition;\n if (position) {\n const {\n style\n } = editToolbar;\n const x = this.#editor._uiManager.direction === \"ltr\" ? 1 - position[0] : position[0];\n style.insetInlineEnd = `${100 * x}%`;\n style.top = `calc(${100 * position[1]}% + var(--editor-toolbar-vert-offset))`;\n }\n this.#addDeleteButton();\n return editToolbar;\n }\n get div() {\n return this.#toolbar;\n }\n static #pointerDown(e) {\n e.stopPropagation();\n }\n #focusIn(e) {\n this.#editor._focusEventsAllowed = false;\n stopEvent(e);\n }\n #focusOut(e) {\n this.#editor._focusEventsAllowed = true;\n stopEvent(e);\n }\n #addListenersToElement(element) {\n const signal = this.#editor._uiManager._signal;\n element.addEventListener(\"focusin\", this.#focusIn.bind(this), {\n capture: true,\n signal\n });\n element.addEventListener(\"focusout\", this.#focusOut.bind(this), {\n capture: true,\n signal\n });\n element.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n }\n hide() {\n this.#toolbar.classList.add(\"hidden\");\n this.#colorPicker?.hideDropdown();\n }\n show() {\n this.#toolbar.classList.remove(\"hidden\");\n this.#altText?.shown();\n }\n #addDeleteButton() {\n const {\n editorType,\n _uiManager\n } = this.#editor;\n const button = document.createElement(\"button\");\n button.className = \"delete\";\n button.tabIndex = 0;\n button.setAttribute(\"data-l10n-id\", EditorToolbar.#l10nRemove[editorType]);\n this.#addListenersToElement(button);\n button.addEventListener(\"click\", e => {\n _uiManager.delete();\n }, {\n signal: _uiManager._signal\n });\n this.#buttons.append(button);\n }\n get #divider() {\n const divider = document.createElement(\"div\");\n divider.className = \"divider\";\n return divider;\n }\n async addAltText(altText) {\n const button = await altText.render();\n this.#addListenersToElement(button);\n this.#buttons.prepend(button, this.#divider);\n this.#altText = altText;\n }\n addColorPicker(colorPicker) {\n this.#colorPicker = colorPicker;\n const button = colorPicker.renderButton();\n this.#addListenersToElement(button);\n this.#buttons.prepend(button, this.#divider);\n }\n remove() {\n this.#toolbar.remove();\n this.#colorPicker?.destroy();\n this.#colorPicker = null;\n }\n}\nclass HighlightToolbar {\n #buttons = null;\n #toolbar = null;\n #uiManager;\n constructor(uiManager) {\n this.#uiManager = uiManager;\n }\n #render() {\n const editToolbar = this.#toolbar = document.createElement(\"div\");\n editToolbar.className = \"editToolbar\";\n editToolbar.setAttribute(\"role\", \"toolbar\");\n editToolbar.addEventListener(\"contextmenu\", noContextMenu, {\n signal: this.#uiManager._signal\n });\n const buttons = this.#buttons = document.createElement(\"div\");\n buttons.className = \"buttons\";\n editToolbar.append(buttons);\n this.#addHighlightButton();\n return editToolbar;\n }\n #getLastPoint(boxes, isLTR) {\n let lastY = 0;\n let lastX = 0;\n for (const box of boxes) {\n const y = box.y + box.height;\n if (y < lastY) {\n continue;\n }\n const x = box.x + (isLTR ? box.width : 0);\n if (y > lastY) {\n lastX = x;\n lastY = y;\n continue;\n }\n if (isLTR) {\n if (x > lastX) {\n lastX = x;\n }\n } else if (x < lastX) {\n lastX = x;\n }\n }\n return [isLTR ? 1 - lastX : lastX, lastY];\n }\n show(parent, boxes, isLTR) {\n const [x, y] = this.#getLastPoint(boxes, isLTR);\n const {\n style\n } = this.#toolbar ||= this.#render();\n parent.append(this.#toolbar);\n style.insetInlineEnd = `${100 * x}%`;\n style.top = `calc(${100 * y}% + var(--editor-toolbar-vert-offset))`;\n }\n hide() {\n this.#toolbar.remove();\n }\n #addHighlightButton() {\n const button = document.createElement(\"button\");\n button.className = \"highlightButton\";\n button.tabIndex = 0;\n button.setAttribute(\"data-l10n-id\", `pdfjs-highlight-floating-button1`);\n const span = document.createElement(\"span\");\n button.append(span);\n span.className = \"visuallyHidden\";\n span.setAttribute(\"data-l10n-id\", \"pdfjs-highlight-floating-button-label\");\n const signal = this.#uiManager._signal;\n button.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n button.addEventListener(\"click\", () => {\n this.#uiManager.highlightSelection(\"floating_button\");\n }, {\n signal\n });\n this.#buttons.append(button);\n }\n}\n\n;// ./src/display/editor/tools.js\n\n\n\nfunction bindEvents(obj, element, names) {\n for (const name of names) {\n element.addEventListener(name, obj[name].bind(obj));\n }\n}\nfunction opacityToHex(opacity) {\n return Math.round(Math.min(255, Math.max(1, 255 * opacity))).toString(16).padStart(2, \"0\");\n}\nclass IdManager {\n #id = 0;\n get id() {\n return `${AnnotationEditorPrefix}${this.#id++}`;\n }\n}\nclass ImageManager {\n #baseId = getUuid();\n #id = 0;\n #cache = null;\n static get _isSVGFittingCanvas() {\n const svg = `data:image/svg+xml;charset=UTF-8,`;\n const canvas = new OffscreenCanvas(1, 3);\n const ctx = canvas.getContext(\"2d\", {\n willReadFrequently: true\n });\n const image = new Image();\n image.src = svg;\n const promise = image.decode().then(() => {\n ctx.drawImage(image, 0, 0, 1, 1, 0, 0, 1, 3);\n return new Uint32Array(ctx.getImageData(0, 0, 1, 1).data.buffer)[0] === 0;\n });\n return shadow(this, \"_isSVGFittingCanvas\", promise);\n }\n async #get(key, rawData) {\n this.#cache ||= new Map();\n let data = this.#cache.get(key);\n if (data === null) {\n return null;\n }\n if (data?.bitmap) {\n data.refCounter += 1;\n return data;\n }\n try {\n data ||= {\n bitmap: null,\n id: `image_${this.#baseId}_${this.#id++}`,\n refCounter: 0,\n isSvg: false\n };\n let image;\n if (typeof rawData === \"string\") {\n data.url = rawData;\n image = await fetchData(rawData, \"blob\");\n } else if (rawData instanceof File) {\n image = data.file = rawData;\n } else if (rawData instanceof Blob) {\n image = rawData;\n }\n if (image.type === \"image/svg+xml\") {\n const mustRemoveAspectRatioPromise = ImageManager._isSVGFittingCanvas;\n const fileReader = new FileReader();\n const imageElement = new Image();\n const imagePromise = new Promise((resolve, reject) => {\n imageElement.onload = () => {\n data.bitmap = imageElement;\n data.isSvg = true;\n resolve();\n };\n fileReader.onload = async () => {\n const url = data.svgUrl = fileReader.result;\n imageElement.src = (await mustRemoveAspectRatioPromise) ? `${url}#svgView(preserveAspectRatio(none))` : url;\n };\n imageElement.onerror = fileReader.onerror = reject;\n });\n fileReader.readAsDataURL(image);\n await imagePromise;\n } else {\n data.bitmap = await createImageBitmap(image);\n }\n data.refCounter = 1;\n } catch (e) {\n warn(e);\n data = null;\n }\n this.#cache.set(key, data);\n if (data) {\n this.#cache.set(data.id, data);\n }\n return data;\n }\n async getFromFile(file) {\n const {\n lastModified,\n name,\n size,\n type\n } = file;\n return this.#get(`${lastModified}_${name}_${size}_${type}`, file);\n }\n async getFromUrl(url) {\n return this.#get(url, url);\n }\n async getFromBlob(id, blobPromise) {\n const blob = await blobPromise;\n return this.#get(id, blob);\n }\n async getFromId(id) {\n this.#cache ||= new Map();\n const data = this.#cache.get(id);\n if (!data) {\n return null;\n }\n if (data.bitmap) {\n data.refCounter += 1;\n return data;\n }\n if (data.file) {\n return this.getFromFile(data.file);\n }\n if (data.blobPromise) {\n const {\n blobPromise\n } = data;\n delete data.blobPromise;\n return this.getFromBlob(data.id, blobPromise);\n }\n return this.getFromUrl(data.url);\n }\n getFromCanvas(id, canvas) {\n this.#cache ||= new Map();\n let data = this.#cache.get(id);\n if (data?.bitmap) {\n data.refCounter += 1;\n return data;\n }\n const offscreen = new OffscreenCanvas(canvas.width, canvas.height);\n const ctx = offscreen.getContext(\"2d\");\n ctx.drawImage(canvas, 0, 0);\n data = {\n bitmap: offscreen.transferToImageBitmap(),\n id: `image_${this.#baseId}_${this.#id++}`,\n refCounter: 1,\n isSvg: false\n };\n this.#cache.set(id, data);\n this.#cache.set(data.id, data);\n return data;\n }\n getSvgUrl(id) {\n const data = this.#cache.get(id);\n if (!data?.isSvg) {\n return null;\n }\n return data.svgUrl;\n }\n deleteId(id) {\n this.#cache ||= new Map();\n const data = this.#cache.get(id);\n if (!data) {\n return;\n }\n data.refCounter -= 1;\n if (data.refCounter !== 0) {\n return;\n }\n const {\n bitmap\n } = data;\n if (!data.url && !data.file) {\n const canvas = new OffscreenCanvas(bitmap.width, bitmap.height);\n const ctx = canvas.getContext(\"bitmaprenderer\");\n ctx.transferFromImageBitmap(bitmap);\n data.blobPromise = canvas.convertToBlob();\n }\n bitmap.close?.();\n data.bitmap = null;\n }\n isValidId(id) {\n return id.startsWith(`image_${this.#baseId}_`);\n }\n}\nclass CommandManager {\n #commands = [];\n #locked = false;\n #maxSize;\n #position = -1;\n constructor(maxSize = 128) {\n this.#maxSize = maxSize;\n }\n add({\n cmd,\n undo,\n post,\n mustExec,\n type = NaN,\n overwriteIfSameType = false,\n keepUndo = false\n }) {\n if (mustExec) {\n cmd();\n }\n if (this.#locked) {\n return;\n }\n const save = {\n cmd,\n undo,\n post,\n type\n };\n if (this.#position === -1) {\n if (this.#commands.length > 0) {\n this.#commands.length = 0;\n }\n this.#position = 0;\n this.#commands.push(save);\n return;\n }\n if (overwriteIfSameType && this.#commands[this.#position].type === type) {\n if (keepUndo) {\n save.undo = this.#commands[this.#position].undo;\n }\n this.#commands[this.#position] = save;\n return;\n }\n const next = this.#position + 1;\n if (next === this.#maxSize) {\n this.#commands.splice(0, 1);\n } else {\n this.#position = next;\n if (next < this.#commands.length) {\n this.#commands.splice(next);\n }\n }\n this.#commands.push(save);\n }\n undo() {\n if (this.#position === -1) {\n return;\n }\n this.#locked = true;\n const {\n undo,\n post\n } = this.#commands[this.#position];\n undo();\n post?.();\n this.#locked = false;\n this.#position -= 1;\n }\n redo() {\n if (this.#position < this.#commands.length - 1) {\n this.#position += 1;\n this.#locked = true;\n const {\n cmd,\n post\n } = this.#commands[this.#position];\n cmd();\n post?.();\n this.#locked = false;\n }\n }\n hasSomethingToUndo() {\n return this.#position !== -1;\n }\n hasSomethingToRedo() {\n return this.#position < this.#commands.length - 1;\n }\n cleanType(type) {\n if (this.#position === -1) {\n return;\n }\n for (let i = this.#position; i >= 0; i--) {\n if (this.#commands[i].type !== type) {\n this.#commands.splice(i + 1, this.#position - i);\n this.#position = i;\n return;\n }\n }\n this.#commands.length = 0;\n this.#position = -1;\n }\n destroy() {\n this.#commands = null;\n }\n}\nclass KeyboardManager {\n constructor(callbacks) {\n this.buffer = [];\n this.callbacks = new Map();\n this.allKeys = new Set();\n const {\n isMac\n } = util_FeatureTest.platform;\n for (const [keys, callback, options = {}] of callbacks) {\n for (const key of keys) {\n const isMacKey = key.startsWith(\"mac+\");\n if (isMac && isMacKey) {\n this.callbacks.set(key.slice(4), {\n callback,\n options\n });\n this.allKeys.add(key.split(\"+\").at(-1));\n } else if (!isMac && !isMacKey) {\n this.callbacks.set(key, {\n callback,\n options\n });\n this.allKeys.add(key.split(\"+\").at(-1));\n }\n }\n }\n }\n #serialize(event) {\n if (event.altKey) {\n this.buffer.push(\"alt\");\n }\n if (event.ctrlKey) {\n this.buffer.push(\"ctrl\");\n }\n if (event.metaKey) {\n this.buffer.push(\"meta\");\n }\n if (event.shiftKey) {\n this.buffer.push(\"shift\");\n }\n this.buffer.push(event.key);\n const str = this.buffer.join(\"+\");\n this.buffer.length = 0;\n return str;\n }\n exec(self, event) {\n if (!this.allKeys.has(event.key)) {\n return;\n }\n const info = this.callbacks.get(this.#serialize(event));\n if (!info) {\n return;\n }\n const {\n callback,\n options: {\n bubbles = false,\n args = [],\n checker = null\n }\n } = info;\n if (checker && !checker(self, event)) {\n return;\n }\n callback.bind(self, ...args, event)();\n if (!bubbles) {\n stopEvent(event);\n }\n }\n}\nclass ColorManager {\n static _colorsMapping = new Map([[\"CanvasText\", [0, 0, 0]], [\"Canvas\", [255, 255, 255]]]);\n get _colors() {\n const colors = new Map([[\"CanvasText\", null], [\"Canvas\", null]]);\n getColorValues(colors);\n return shadow(this, \"_colors\", colors);\n }\n convert(color) {\n const rgb = getRGB(color);\n if (!window.matchMedia(\"(forced-colors: active)\").matches) {\n return rgb;\n }\n for (const [name, RGB] of this._colors) {\n if (RGB.every((x, i) => x === rgb[i])) {\n return ColorManager._colorsMapping.get(name);\n }\n }\n return rgb;\n }\n getHexCode(name) {\n const rgb = this._colors.get(name);\n if (!rgb) {\n return name;\n }\n return Util.makeHexColor(...rgb);\n }\n}\nclass AnnotationEditorUIManager {\n #abortController = new AbortController();\n #activeEditor = null;\n #allEditors = new Map();\n #allLayers = new Map();\n #altTextManager = null;\n #annotationStorage = null;\n #changedExistingAnnotations = null;\n #commandManager = new CommandManager();\n #copyPasteAC = null;\n #currentDrawingSession = null;\n #currentPageIndex = 0;\n #deletedAnnotationsElementIds = new Set();\n #draggingEditors = null;\n #editorTypes = null;\n #editorsToRescale = new Set();\n _editorUndoBar = null;\n #enableHighlightFloatingButton = false;\n #enableUpdatedAddImage = false;\n #enableNewAltTextWhenAddingImage = false;\n #filterFactory = null;\n #focusMainContainerTimeoutId = null;\n #focusManagerAC = null;\n #highlightColors = null;\n #highlightWhenShiftUp = false;\n #highlightToolbar = null;\n #idManager = new IdManager();\n #isEnabled = false;\n #isWaiting = false;\n #keyboardManagerAC = null;\n #lastActiveElement = null;\n #mainHighlightColorPicker = null;\n #mlManager = null;\n #mode = AnnotationEditorType.NONE;\n #selectedEditors = new Set();\n #selectedTextNode = null;\n #pageColors = null;\n #showAllStates = null;\n #previousStates = {\n isEditing: false,\n isEmpty: true,\n hasSomethingToUndo: false,\n hasSomethingToRedo: false,\n hasSelectedEditor: false,\n hasSelectedText: false\n };\n #translation = [0, 0];\n #translationTimeoutId = null;\n #container = null;\n #viewer = null;\n #updateModeCapability = null;\n static TRANSLATE_SMALL = 1;\n static TRANSLATE_BIG = 10;\n static get _keyboardManager() {\n const proto = AnnotationEditorUIManager.prototype;\n const arrowChecker = self => self.#container.contains(document.activeElement) && document.activeElement.tagName !== \"BUTTON\" && self.hasSomethingToControl();\n const textInputChecker = (_self, {\n target: el\n }) => {\n if (el instanceof HTMLInputElement) {\n const {\n type\n } = el;\n return type !== \"text\" && type !== \"number\";\n }\n return true;\n };\n const small = this.TRANSLATE_SMALL;\n const big = this.TRANSLATE_BIG;\n return shadow(this, \"_keyboardManager\", new KeyboardManager([[[\"ctrl+a\", \"mac+meta+a\"], proto.selectAll, {\n checker: textInputChecker\n }], [[\"ctrl+z\", \"mac+meta+z\"], proto.undo, {\n checker: textInputChecker\n }], [[\"ctrl+y\", \"ctrl+shift+z\", \"mac+meta+shift+z\", \"ctrl+shift+Z\", \"mac+meta+shift+Z\"], proto.redo, {\n checker: textInputChecker\n }], [[\"Backspace\", \"alt+Backspace\", \"ctrl+Backspace\", \"shift+Backspace\", \"mac+Backspace\", \"mac+alt+Backspace\", \"mac+ctrl+Backspace\", \"Delete\", \"ctrl+Delete\", \"shift+Delete\", \"mac+Delete\"], proto.delete, {\n checker: textInputChecker\n }], [[\"Enter\", \"mac+Enter\"], proto.addNewEditorFromKeyboard, {\n checker: (self, {\n target: el\n }) => !(el instanceof HTMLButtonElement) && self.#container.contains(el) && !self.isEnterHandled\n }], [[\" \", \"mac+ \"], proto.addNewEditorFromKeyboard, {\n checker: (self, {\n target: el\n }) => !(el instanceof HTMLButtonElement) && self.#container.contains(document.activeElement)\n }], [[\"Escape\", \"mac+Escape\"], proto.unselectAll], [[\"ArrowLeft\", \"mac+ArrowLeft\"], proto.translateSelectedEditors, {\n args: [-small, 0],\n checker: arrowChecker\n }], [[\"ctrl+ArrowLeft\", \"mac+shift+ArrowLeft\"], proto.translateSelectedEditors, {\n args: [-big, 0],\n checker: arrowChecker\n }], [[\"ArrowRight\", \"mac+ArrowRight\"], proto.translateSelectedEditors, {\n args: [small, 0],\n checker: arrowChecker\n }], [[\"ctrl+ArrowRight\", \"mac+shift+ArrowRight\"], proto.translateSelectedEditors, {\n args: [big, 0],\n checker: arrowChecker\n }], [[\"ArrowUp\", \"mac+ArrowUp\"], proto.translateSelectedEditors, {\n args: [0, -small],\n checker: arrowChecker\n }], [[\"ctrl+ArrowUp\", \"mac+shift+ArrowUp\"], proto.translateSelectedEditors, {\n args: [0, -big],\n checker: arrowChecker\n }], [[\"ArrowDown\", \"mac+ArrowDown\"], proto.translateSelectedEditors, {\n args: [0, small],\n checker: arrowChecker\n }], [[\"ctrl+ArrowDown\", \"mac+shift+ArrowDown\"], proto.translateSelectedEditors, {\n args: [0, big],\n checker: arrowChecker\n }]]));\n }\n constructor(container, viewer, altTextManager, eventBus, pdfDocument, pageColors, highlightColors, enableHighlightFloatingButton, enableUpdatedAddImage, enableNewAltTextWhenAddingImage, mlManager, editorUndoBar, supportsPinchToZoom) {\n const signal = this._signal = this.#abortController.signal;\n this.#container = container;\n this.#viewer = viewer;\n this.#altTextManager = altTextManager;\n this._eventBus = eventBus;\n eventBus._on(\"editingaction\", this.onEditingAction.bind(this), {\n signal\n });\n eventBus._on(\"pagechanging\", this.onPageChanging.bind(this), {\n signal\n });\n eventBus._on(\"scalechanging\", this.onScaleChanging.bind(this), {\n signal\n });\n eventBus._on(\"rotationchanging\", this.onRotationChanging.bind(this), {\n signal\n });\n eventBus._on(\"setpreference\", this.onSetPreference.bind(this), {\n signal\n });\n eventBus._on(\"switchannotationeditorparams\", evt => this.updateParams(evt.type, evt.value), {\n signal\n });\n this.#addSelectionListener();\n this.#addDragAndDropListeners();\n this.#addKeyboardManager();\n this.#annotationStorage = pdfDocument.annotationStorage;\n this.#filterFactory = pdfDocument.filterFactory;\n this.#pageColors = pageColors;\n this.#highlightColors = highlightColors || null;\n this.#enableHighlightFloatingButton = enableHighlightFloatingButton;\n this.#enableUpdatedAddImage = enableUpdatedAddImage;\n this.#enableNewAltTextWhenAddingImage = enableNewAltTextWhenAddingImage;\n this.#mlManager = mlManager || null;\n this.viewParameters = {\n realScale: PixelsPerInch.PDF_TO_CSS_UNITS,\n rotation: 0\n };\n this.isShiftKeyDown = false;\n this._editorUndoBar = editorUndoBar || null;\n this._supportsPinchToZoom = supportsPinchToZoom !== false;\n }\n destroy() {\n this.#updateModeCapability?.resolve();\n this.#updateModeCapability = null;\n this.#abortController?.abort();\n this.#abortController = null;\n this._signal = null;\n for (const layer of this.#allLayers.values()) {\n layer.destroy();\n }\n this.#allLayers.clear();\n this.#allEditors.clear();\n this.#editorsToRescale.clear();\n this.#activeEditor = null;\n this.#selectedEditors.clear();\n this.#commandManager.destroy();\n this.#altTextManager?.destroy();\n this.#highlightToolbar?.hide();\n this.#highlightToolbar = null;\n if (this.#focusMainContainerTimeoutId) {\n clearTimeout(this.#focusMainContainerTimeoutId);\n this.#focusMainContainerTimeoutId = null;\n }\n if (this.#translationTimeoutId) {\n clearTimeout(this.#translationTimeoutId);\n this.#translationTimeoutId = null;\n }\n this._editorUndoBar?.destroy();\n }\n combinedSignal(ac) {\n return AbortSignal.any([this._signal, ac.signal]);\n }\n get mlManager() {\n return this.#mlManager;\n }\n get useNewAltTextFlow() {\n return this.#enableUpdatedAddImage;\n }\n get useNewAltTextWhenAddingImage() {\n return this.#enableNewAltTextWhenAddingImage;\n }\n get hcmFilter() {\n return shadow(this, \"hcmFilter\", this.#pageColors ? this.#filterFactory.addHCMFilter(this.#pageColors.foreground, this.#pageColors.background) : \"none\");\n }\n get direction() {\n return shadow(this, \"direction\", getComputedStyle(this.#container).direction);\n }\n get highlightColors() {\n return shadow(this, \"highlightColors\", this.#highlightColors ? new Map(this.#highlightColors.split(\",\").map(pair => pair.split(\"=\").map(x => x.trim()))) : null);\n }\n get highlightColorNames() {\n return shadow(this, \"highlightColorNames\", this.highlightColors ? new Map(Array.from(this.highlightColors, e => e.reverse())) : null);\n }\n setCurrentDrawingSession(layer) {\n if (layer) {\n this.unselectAll();\n this.disableUserSelect(true);\n } else {\n this.disableUserSelect(false);\n }\n this.#currentDrawingSession = layer;\n }\n setMainHighlightColorPicker(colorPicker) {\n this.#mainHighlightColorPicker = colorPicker;\n }\n editAltText(editor, firstTime = false) {\n this.#altTextManager?.editAltText(this, editor, firstTime);\n }\n switchToMode(mode, callback) {\n this._eventBus.on(\"annotationeditormodechanged\", callback, {\n once: true,\n signal: this._signal\n });\n this._eventBus.dispatch(\"showannotationeditorui\", {\n source: this,\n mode\n });\n }\n setPreference(name, value) {\n this._eventBus.dispatch(\"setpreference\", {\n source: this,\n name,\n value\n });\n }\n onSetPreference({\n name,\n value\n }) {\n switch (name) {\n case \"enableNewAltTextWhenAddingImage\":\n this.#enableNewAltTextWhenAddingImage = value;\n break;\n }\n }\n onPageChanging({\n pageNumber\n }) {\n this.#currentPageIndex = pageNumber - 1;\n }\n focusMainContainer() {\n this.#container.focus();\n }\n findParent(x, y) {\n for (const layer of this.#allLayers.values()) {\n const {\n x: layerX,\n y: layerY,\n width,\n height\n } = layer.div.getBoundingClientRect();\n if (x >= layerX && x <= layerX + width && y >= layerY && y <= layerY + height) {\n return layer;\n }\n }\n return null;\n }\n disableUserSelect(value = false) {\n this.#viewer.classList.toggle(\"noUserSelect\", value);\n }\n addShouldRescale(editor) {\n this.#editorsToRescale.add(editor);\n }\n removeShouldRescale(editor) {\n this.#editorsToRescale.delete(editor);\n }\n onScaleChanging({\n scale\n }) {\n this.commitOrRemove();\n this.viewParameters.realScale = scale * PixelsPerInch.PDF_TO_CSS_UNITS;\n for (const editor of this.#editorsToRescale) {\n editor.onScaleChanging();\n }\n this.#currentDrawingSession?.onScaleChanging();\n }\n onRotationChanging({\n pagesRotation\n }) {\n this.commitOrRemove();\n this.viewParameters.rotation = pagesRotation;\n }\n #getAnchorElementForSelection({\n anchorNode\n }) {\n return anchorNode.nodeType === Node.TEXT_NODE ? anchorNode.parentElement : anchorNode;\n }\n #getLayerForTextLayer(textLayer) {\n const {\n currentLayer\n } = this;\n if (currentLayer.hasTextLayer(textLayer)) {\n return currentLayer;\n }\n for (const layer of this.#allLayers.values()) {\n if (layer.hasTextLayer(textLayer)) {\n return layer;\n }\n }\n return null;\n }\n highlightSelection(methodOfCreation = \"\") {\n const selection = document.getSelection();\n if (!selection || selection.isCollapsed) {\n return;\n }\n const {\n anchorNode,\n anchorOffset,\n focusNode,\n focusOffset\n } = selection;\n const text = selection.toString();\n const anchorElement = this.#getAnchorElementForSelection(selection);\n const textLayer = anchorElement.closest(\".textLayer\");\n const boxes = this.getSelectionBoxes(textLayer);\n if (!boxes) {\n return;\n }\n selection.empty();\n const layer = this.#getLayerForTextLayer(textLayer);\n const isNoneMode = this.#mode === AnnotationEditorType.NONE;\n const callback = () => {\n layer?.createAndAddNewEditor({\n x: 0,\n y: 0\n }, false, {\n methodOfCreation,\n boxes,\n anchorNode,\n anchorOffset,\n focusNode,\n focusOffset,\n text\n });\n if (isNoneMode) {\n this.showAllEditors(\"highlight\", true, true);\n }\n };\n if (isNoneMode) {\n this.switchToMode(AnnotationEditorType.HIGHLIGHT, callback);\n return;\n }\n callback();\n }\n #displayHighlightToolbar() {\n const selection = document.getSelection();\n if (!selection || selection.isCollapsed) {\n return;\n }\n const anchorElement = this.#getAnchorElementForSelection(selection);\n const textLayer = anchorElement.closest(\".textLayer\");\n const boxes = this.getSelectionBoxes(textLayer);\n if (!boxes) {\n return;\n }\n this.#highlightToolbar ||= new HighlightToolbar(this);\n this.#highlightToolbar.show(textLayer, boxes, this.direction === \"ltr\");\n }\n addToAnnotationStorage(editor) {\n if (!editor.isEmpty() && this.#annotationStorage && !this.#annotationStorage.has(editor.id)) {\n this.#annotationStorage.setValue(editor.id, editor);\n }\n }\n #selectionChange() {\n const selection = document.getSelection();\n if (!selection || selection.isCollapsed) {\n if (this.#selectedTextNode) {\n this.#highlightToolbar?.hide();\n this.#selectedTextNode = null;\n this.#dispatchUpdateStates({\n hasSelectedText: false\n });\n }\n return;\n }\n const {\n anchorNode\n } = selection;\n if (anchorNode === this.#selectedTextNode) {\n return;\n }\n const anchorElement = this.#getAnchorElementForSelection(selection);\n const textLayer = anchorElement.closest(\".textLayer\");\n if (!textLayer) {\n if (this.#selectedTextNode) {\n this.#highlightToolbar?.hide();\n this.#selectedTextNode = null;\n this.#dispatchUpdateStates({\n hasSelectedText: false\n });\n }\n return;\n }\n this.#highlightToolbar?.hide();\n this.#selectedTextNode = anchorNode;\n this.#dispatchUpdateStates({\n hasSelectedText: true\n });\n if (this.#mode !== AnnotationEditorType.HIGHLIGHT && this.#mode !== AnnotationEditorType.NONE) {\n return;\n }\n if (this.#mode === AnnotationEditorType.HIGHLIGHT) {\n this.showAllEditors(\"highlight\", true, true);\n }\n this.#highlightWhenShiftUp = this.isShiftKeyDown;\n if (!this.isShiftKeyDown) {\n const activeLayer = this.#mode === AnnotationEditorType.HIGHLIGHT ? this.#getLayerForTextLayer(textLayer) : null;\n activeLayer?.toggleDrawing();\n const ac = new AbortController();\n const signal = this.combinedSignal(ac);\n const pointerup = e => {\n if (e.type === \"pointerup\" && e.button !== 0) {\n return;\n }\n ac.abort();\n activeLayer?.toggleDrawing(true);\n if (e.type === \"pointerup\") {\n this.#onSelectEnd(\"main_toolbar\");\n }\n };\n window.addEventListener(\"pointerup\", pointerup, {\n signal\n });\n window.addEventListener(\"blur\", pointerup, {\n signal\n });\n }\n }\n #onSelectEnd(methodOfCreation = \"\") {\n if (this.#mode === AnnotationEditorType.HIGHLIGHT) {\n this.highlightSelection(methodOfCreation);\n } else if (this.#enableHighlightFloatingButton) {\n this.#displayHighlightToolbar();\n }\n }\n #addSelectionListener() {\n document.addEventListener(\"selectionchange\", this.#selectionChange.bind(this), {\n signal: this._signal\n });\n }\n #addFocusManager() {\n if (this.#focusManagerAC) {\n return;\n }\n this.#focusManagerAC = new AbortController();\n const signal = this.combinedSignal(this.#focusManagerAC);\n window.addEventListener(\"focus\", this.focus.bind(this), {\n signal\n });\n window.addEventListener(\"blur\", this.blur.bind(this), {\n signal\n });\n }\n #removeFocusManager() {\n this.#focusManagerAC?.abort();\n this.#focusManagerAC = null;\n }\n blur() {\n this.isShiftKeyDown = false;\n if (this.#highlightWhenShiftUp) {\n this.#highlightWhenShiftUp = false;\n this.#onSelectEnd(\"main_toolbar\");\n }\n if (!this.hasSelection) {\n return;\n }\n const {\n activeElement\n } = document;\n for (const editor of this.#selectedEditors) {\n if (editor.div.contains(activeElement)) {\n this.#lastActiveElement = [editor, activeElement];\n editor._focusEventsAllowed = false;\n break;\n }\n }\n }\n focus() {\n if (!this.#lastActiveElement) {\n return;\n }\n const [lastEditor, lastActiveElement] = this.#lastActiveElement;\n this.#lastActiveElement = null;\n lastActiveElement.addEventListener(\"focusin\", () => {\n lastEditor._focusEventsAllowed = true;\n }, {\n once: true,\n signal: this._signal\n });\n lastActiveElement.focus();\n }\n #addKeyboardManager() {\n if (this.#keyboardManagerAC) {\n return;\n }\n this.#keyboardManagerAC = new AbortController();\n const signal = this.combinedSignal(this.#keyboardManagerAC);\n window.addEventListener(\"keydown\", this.keydown.bind(this), {\n signal\n });\n window.addEventListener(\"keyup\", this.keyup.bind(this), {\n signal\n });\n }\n #removeKeyboardManager() {\n this.#keyboardManagerAC?.abort();\n this.#keyboardManagerAC = null;\n }\n #addCopyPasteListeners() {\n if (this.#copyPasteAC) {\n return;\n }\n this.#copyPasteAC = new AbortController();\n const signal = this.combinedSignal(this.#copyPasteAC);\n document.addEventListener(\"copy\", this.copy.bind(this), {\n signal\n });\n document.addEventListener(\"cut\", this.cut.bind(this), {\n signal\n });\n document.addEventListener(\"paste\", this.paste.bind(this), {\n signal\n });\n }\n #removeCopyPasteListeners() {\n this.#copyPasteAC?.abort();\n this.#copyPasteAC = null;\n }\n #addDragAndDropListeners() {\n const signal = this._signal;\n document.addEventListener(\"dragover\", this.dragOver.bind(this), {\n signal\n });\n document.addEventListener(\"drop\", this.drop.bind(this), {\n signal\n });\n }\n addEditListeners() {\n this.#addKeyboardManager();\n this.#addCopyPasteListeners();\n }\n removeEditListeners() {\n this.#removeKeyboardManager();\n this.#removeCopyPasteListeners();\n }\n dragOver(event) {\n for (const {\n type\n } of event.dataTransfer.items) {\n for (const editorType of this.#editorTypes) {\n if (editorType.isHandlingMimeForPasting(type)) {\n event.dataTransfer.dropEffect = \"copy\";\n event.preventDefault();\n return;\n }\n }\n }\n }\n drop(event) {\n for (const item of event.dataTransfer.items) {\n for (const editorType of this.#editorTypes) {\n if (editorType.isHandlingMimeForPasting(item.type)) {\n editorType.paste(item, this.currentLayer);\n event.preventDefault();\n return;\n }\n }\n }\n }\n copy(event) {\n event.preventDefault();\n this.#activeEditor?.commitOrRemove();\n if (!this.hasSelection) {\n return;\n }\n const editors = [];\n for (const editor of this.#selectedEditors) {\n const serialized = editor.serialize(true);\n if (serialized) {\n editors.push(serialized);\n }\n }\n if (editors.length === 0) {\n return;\n }\n event.clipboardData.setData(\"application/pdfjs\", JSON.stringify(editors));\n }\n cut(event) {\n this.copy(event);\n this.delete();\n }\n async paste(event) {\n event.preventDefault();\n const {\n clipboardData\n } = event;\n for (const item of clipboardData.items) {\n for (const editorType of this.#editorTypes) {\n if (editorType.isHandlingMimeForPasting(item.type)) {\n editorType.paste(item, this.currentLayer);\n return;\n }\n }\n }\n let data = clipboardData.getData(\"application/pdfjs\");\n if (!data) {\n return;\n }\n try {\n data = JSON.parse(data);\n } catch (ex) {\n warn(`paste: \"${ex.message}\".`);\n return;\n }\n if (!Array.isArray(data)) {\n return;\n }\n this.unselectAll();\n const layer = this.currentLayer;\n try {\n const newEditors = [];\n for (const editor of data) {\n const deserializedEditor = await layer.deserialize(editor);\n if (!deserializedEditor) {\n return;\n }\n newEditors.push(deserializedEditor);\n }\n const cmd = () => {\n for (const editor of newEditors) {\n this.#addEditorToLayer(editor);\n }\n this.#selectEditors(newEditors);\n };\n const undo = () => {\n for (const editor of newEditors) {\n editor.remove();\n }\n };\n this.addCommands({\n cmd,\n undo,\n mustExec: true\n });\n } catch (ex) {\n warn(`paste: \"${ex.message}\".`);\n }\n }\n keydown(event) {\n if (!this.isShiftKeyDown && event.key === \"Shift\") {\n this.isShiftKeyDown = true;\n }\n if (this.#mode !== AnnotationEditorType.NONE && !this.isEditorHandlingKeyboard) {\n AnnotationEditorUIManager._keyboardManager.exec(this, event);\n }\n }\n keyup(event) {\n if (this.isShiftKeyDown && event.key === \"Shift\") {\n this.isShiftKeyDown = false;\n if (this.#highlightWhenShiftUp) {\n this.#highlightWhenShiftUp = false;\n this.#onSelectEnd(\"main_toolbar\");\n }\n }\n }\n onEditingAction({\n name\n }) {\n switch (name) {\n case \"undo\":\n case \"redo\":\n case \"delete\":\n case \"selectAll\":\n this[name]();\n break;\n case \"highlightSelection\":\n this.highlightSelection(\"context_menu\");\n break;\n }\n }\n #dispatchUpdateStates(details) {\n const hasChanged = Object.entries(details).some(([key, value]) => this.#previousStates[key] !== value);\n if (hasChanged) {\n this._eventBus.dispatch(\"annotationeditorstateschanged\", {\n source: this,\n details: Object.assign(this.#previousStates, details)\n });\n if (this.#mode === AnnotationEditorType.HIGHLIGHT && details.hasSelectedEditor === false) {\n this.#dispatchUpdateUI([[AnnotationEditorParamsType.HIGHLIGHT_FREE, true]]);\n }\n }\n }\n #dispatchUpdateUI(details) {\n this._eventBus.dispatch(\"annotationeditorparamschanged\", {\n source: this,\n details\n });\n }\n setEditingState(isEditing) {\n if (isEditing) {\n this.#addFocusManager();\n this.#addCopyPasteListeners();\n this.#dispatchUpdateStates({\n isEditing: this.#mode !== AnnotationEditorType.NONE,\n isEmpty: this.#isEmpty(),\n hasSomethingToUndo: this.#commandManager.hasSomethingToUndo(),\n hasSomethingToRedo: this.#commandManager.hasSomethingToRedo(),\n hasSelectedEditor: false\n });\n } else {\n this.#removeFocusManager();\n this.#removeCopyPasteListeners();\n this.#dispatchUpdateStates({\n isEditing: false\n });\n this.disableUserSelect(false);\n }\n }\n registerEditorTypes(types) {\n if (this.#editorTypes) {\n return;\n }\n this.#editorTypes = types;\n for (const editorType of this.#editorTypes) {\n this.#dispatchUpdateUI(editorType.defaultPropertiesToUpdate);\n }\n }\n getId() {\n return this.#idManager.id;\n }\n get currentLayer() {\n return this.#allLayers.get(this.#currentPageIndex);\n }\n getLayer(pageIndex) {\n return this.#allLayers.get(pageIndex);\n }\n get currentPageIndex() {\n return this.#currentPageIndex;\n }\n addLayer(layer) {\n this.#allLayers.set(layer.pageIndex, layer);\n if (this.#isEnabled) {\n layer.enable();\n } else {\n layer.disable();\n }\n }\n removeLayer(layer) {\n this.#allLayers.delete(layer.pageIndex);\n }\n async updateMode(mode, editId = null, isFromKeyboard = false) {\n if (this.#mode === mode) {\n return;\n }\n if (this.#updateModeCapability) {\n await this.#updateModeCapability.promise;\n if (!this.#updateModeCapability) {\n return;\n }\n }\n this.#updateModeCapability = Promise.withResolvers();\n this.#mode = mode;\n if (mode === AnnotationEditorType.NONE) {\n this.setEditingState(false);\n this.#disableAll();\n this._editorUndoBar?.hide();\n this.#updateModeCapability.resolve();\n return;\n }\n this.setEditingState(true);\n await this.#enableAll();\n this.unselectAll();\n for (const layer of this.#allLayers.values()) {\n layer.updateMode(mode);\n }\n if (!editId) {\n if (isFromKeyboard) {\n this.addNewEditorFromKeyboard();\n }\n this.#updateModeCapability.resolve();\n return;\n }\n for (const editor of this.#allEditors.values()) {\n if (editor.annotationElementId === editId) {\n this.setSelected(editor);\n editor.enterInEditMode();\n } else {\n editor.unselect();\n }\n }\n this.#updateModeCapability.resolve();\n }\n addNewEditorFromKeyboard() {\n if (this.currentLayer.canCreateNewEmptyEditor()) {\n this.currentLayer.addNewEditor();\n }\n }\n updateToolbar(mode) {\n if (mode === this.#mode) {\n return;\n }\n this._eventBus.dispatch(\"switchannotationeditormode\", {\n source: this,\n mode\n });\n }\n updateParams(type, value) {\n if (!this.#editorTypes) {\n return;\n }\n switch (type) {\n case AnnotationEditorParamsType.CREATE:\n this.currentLayer.addNewEditor();\n return;\n case AnnotationEditorParamsType.HIGHLIGHT_DEFAULT_COLOR:\n this.#mainHighlightColorPicker?.updateColor(value);\n break;\n case AnnotationEditorParamsType.HIGHLIGHT_SHOW_ALL:\n this._eventBus.dispatch(\"reporttelemetry\", {\n source: this,\n details: {\n type: \"editing\",\n data: {\n type: \"highlight\",\n action: \"toggle_visibility\"\n }\n }\n });\n (this.#showAllStates ||= new Map()).set(type, value);\n this.showAllEditors(\"highlight\", value);\n break;\n }\n for (const editor of this.#selectedEditors) {\n editor.updateParams(type, value);\n }\n for (const editorType of this.#editorTypes) {\n editorType.updateDefaultParams(type, value);\n }\n }\n showAllEditors(type, visible, updateButton = false) {\n for (const editor of this.#allEditors.values()) {\n if (editor.editorType === type) {\n editor.show(visible);\n }\n }\n const state = this.#showAllStates?.get(AnnotationEditorParamsType.HIGHLIGHT_SHOW_ALL) ?? true;\n if (state !== visible) {\n this.#dispatchUpdateUI([[AnnotationEditorParamsType.HIGHLIGHT_SHOW_ALL, visible]]);\n }\n }\n enableWaiting(mustWait = false) {\n if (this.#isWaiting === mustWait) {\n return;\n }\n this.#isWaiting = mustWait;\n for (const layer of this.#allLayers.values()) {\n if (mustWait) {\n layer.disableClick();\n } else {\n layer.enableClick();\n }\n layer.div.classList.toggle(\"waiting\", mustWait);\n }\n }\n async #enableAll() {\n if (!this.#isEnabled) {\n this.#isEnabled = true;\n const promises = [];\n for (const layer of this.#allLayers.values()) {\n promises.push(layer.enable());\n }\n await Promise.all(promises);\n for (const editor of this.#allEditors.values()) {\n editor.enable();\n }\n }\n }\n #disableAll() {\n this.unselectAll();\n if (this.#isEnabled) {\n this.#isEnabled = false;\n for (const layer of this.#allLayers.values()) {\n layer.disable();\n }\n for (const editor of this.#allEditors.values()) {\n editor.disable();\n }\n }\n }\n getEditors(pageIndex) {\n const editors = [];\n for (const editor of this.#allEditors.values()) {\n if (editor.pageIndex === pageIndex) {\n editors.push(editor);\n }\n }\n return editors;\n }\n getEditor(id) {\n return this.#allEditors.get(id);\n }\n addEditor(editor) {\n this.#allEditors.set(editor.id, editor);\n }\n removeEditor(editor) {\n if (editor.div.contains(document.activeElement)) {\n if (this.#focusMainContainerTimeoutId) {\n clearTimeout(this.#focusMainContainerTimeoutId);\n }\n this.#focusMainContainerTimeoutId = setTimeout(() => {\n this.focusMainContainer();\n this.#focusMainContainerTimeoutId = null;\n }, 0);\n }\n this.#allEditors.delete(editor.id);\n this.unselect(editor);\n if (!editor.annotationElementId || !this.#deletedAnnotationsElementIds.has(editor.annotationElementId)) {\n this.#annotationStorage?.remove(editor.id);\n }\n }\n addDeletedAnnotationElement(editor) {\n this.#deletedAnnotationsElementIds.add(editor.annotationElementId);\n this.addChangedExistingAnnotation(editor);\n editor.deleted = true;\n }\n isDeletedAnnotationElement(annotationElementId) {\n return this.#deletedAnnotationsElementIds.has(annotationElementId);\n }\n removeDeletedAnnotationElement(editor) {\n this.#deletedAnnotationsElementIds.delete(editor.annotationElementId);\n this.removeChangedExistingAnnotation(editor);\n editor.deleted = false;\n }\n #addEditorToLayer(editor) {\n const layer = this.#allLayers.get(editor.pageIndex);\n if (layer) {\n layer.addOrRebuild(editor);\n } else {\n this.addEditor(editor);\n this.addToAnnotationStorage(editor);\n }\n }\n setActiveEditor(editor) {\n if (this.#activeEditor === editor) {\n return;\n }\n this.#activeEditor = editor;\n if (editor) {\n this.#dispatchUpdateUI(editor.propertiesToUpdate);\n }\n }\n get #lastSelectedEditor() {\n let ed = null;\n for (ed of this.#selectedEditors) {}\n return ed;\n }\n updateUI(editor) {\n if (this.#lastSelectedEditor === editor) {\n this.#dispatchUpdateUI(editor.propertiesToUpdate);\n }\n }\n updateUIForDefaultProperties(editorType) {\n this.#dispatchUpdateUI(editorType.defaultPropertiesToUpdate);\n }\n toggleSelected(editor) {\n if (this.#selectedEditors.has(editor)) {\n this.#selectedEditors.delete(editor);\n editor.unselect();\n this.#dispatchUpdateStates({\n hasSelectedEditor: this.hasSelection\n });\n return;\n }\n this.#selectedEditors.add(editor);\n editor.select();\n this.#dispatchUpdateUI(editor.propertiesToUpdate);\n this.#dispatchUpdateStates({\n hasSelectedEditor: true\n });\n }\n setSelected(editor) {\n this.#currentDrawingSession?.commitOrRemove();\n for (const ed of this.#selectedEditors) {\n if (ed !== editor) {\n ed.unselect();\n }\n }\n this.#selectedEditors.clear();\n this.#selectedEditors.add(editor);\n editor.select();\n this.#dispatchUpdateUI(editor.propertiesToUpdate);\n this.#dispatchUpdateStates({\n hasSelectedEditor: true\n });\n }\n isSelected(editor) {\n return this.#selectedEditors.has(editor);\n }\n get firstSelectedEditor() {\n return this.#selectedEditors.values().next().value;\n }\n unselect(editor) {\n editor.unselect();\n this.#selectedEditors.delete(editor);\n this.#dispatchUpdateStates({\n hasSelectedEditor: this.hasSelection\n });\n }\n get hasSelection() {\n return this.#selectedEditors.size !== 0;\n }\n get isEnterHandled() {\n return this.#selectedEditors.size === 1 && this.firstSelectedEditor.isEnterHandled;\n }\n undo() {\n this.#commandManager.undo();\n this.#dispatchUpdateStates({\n hasSomethingToUndo: this.#commandManager.hasSomethingToUndo(),\n hasSomethingToRedo: true,\n isEmpty: this.#isEmpty()\n });\n this._editorUndoBar?.hide();\n }\n redo() {\n this.#commandManager.redo();\n this.#dispatchUpdateStates({\n hasSomethingToUndo: true,\n hasSomethingToRedo: this.#commandManager.hasSomethingToRedo(),\n isEmpty: this.#isEmpty()\n });\n }\n addCommands(params) {\n this.#commandManager.add(params);\n this.#dispatchUpdateStates({\n hasSomethingToUndo: true,\n hasSomethingToRedo: false,\n isEmpty: this.#isEmpty()\n });\n }\n cleanUndoStack(type) {\n this.#commandManager.cleanType(type);\n }\n #isEmpty() {\n if (this.#allEditors.size === 0) {\n return true;\n }\n if (this.#allEditors.size === 1) {\n for (const editor of this.#allEditors.values()) {\n return editor.isEmpty();\n }\n }\n return false;\n }\n delete() {\n this.commitOrRemove();\n const drawingEditor = this.currentLayer?.endDrawingSession(true);\n if (!this.hasSelection && !drawingEditor) {\n return;\n }\n const editors = drawingEditor ? [drawingEditor] : [...this.#selectedEditors];\n const cmd = () => {\n this._editorUndoBar?.show(undo, editors.length === 1 ? editors[0].editorType : editors.length);\n for (const editor of editors) {\n editor.remove();\n }\n };\n const undo = () => {\n for (const editor of editors) {\n this.#addEditorToLayer(editor);\n }\n };\n this.addCommands({\n cmd,\n undo,\n mustExec: true\n });\n }\n commitOrRemove() {\n this.#activeEditor?.commitOrRemove();\n }\n hasSomethingToControl() {\n return this.#activeEditor || this.hasSelection;\n }\n #selectEditors(editors) {\n for (const editor of this.#selectedEditors) {\n editor.unselect();\n }\n this.#selectedEditors.clear();\n for (const editor of editors) {\n if (editor.isEmpty()) {\n continue;\n }\n this.#selectedEditors.add(editor);\n editor.select();\n }\n this.#dispatchUpdateStates({\n hasSelectedEditor: this.hasSelection\n });\n }\n selectAll() {\n for (const editor of this.#selectedEditors) {\n editor.commit();\n }\n this.#selectEditors(this.#allEditors.values());\n }\n unselectAll() {\n if (this.#activeEditor) {\n this.#activeEditor.commitOrRemove();\n if (this.#mode !== AnnotationEditorType.NONE) {\n return;\n }\n }\n if (this.#currentDrawingSession?.commitOrRemove()) {\n return;\n }\n if (!this.hasSelection) {\n return;\n }\n for (const editor of this.#selectedEditors) {\n editor.unselect();\n }\n this.#selectedEditors.clear();\n this.#dispatchUpdateStates({\n hasSelectedEditor: false\n });\n }\n translateSelectedEditors(x, y, noCommit = false) {\n if (!noCommit) {\n this.commitOrRemove();\n }\n if (!this.hasSelection) {\n return;\n }\n this.#translation[0] += x;\n this.#translation[1] += y;\n const [totalX, totalY] = this.#translation;\n const editors = [...this.#selectedEditors];\n const TIME_TO_WAIT = 1000;\n if (this.#translationTimeoutId) {\n clearTimeout(this.#translationTimeoutId);\n }\n this.#translationTimeoutId = setTimeout(() => {\n this.#translationTimeoutId = null;\n this.#translation[0] = this.#translation[1] = 0;\n this.addCommands({\n cmd: () => {\n for (const editor of editors) {\n if (this.#allEditors.has(editor.id)) {\n editor.translateInPage(totalX, totalY);\n }\n }\n },\n undo: () => {\n for (const editor of editors) {\n if (this.#allEditors.has(editor.id)) {\n editor.translateInPage(-totalX, -totalY);\n }\n }\n },\n mustExec: false\n });\n }, TIME_TO_WAIT);\n for (const editor of editors) {\n editor.translateInPage(x, y);\n }\n }\n setUpDragSession() {\n if (!this.hasSelection) {\n return;\n }\n this.disableUserSelect(true);\n this.#draggingEditors = new Map();\n for (const editor of this.#selectedEditors) {\n this.#draggingEditors.set(editor, {\n savedX: editor.x,\n savedY: editor.y,\n savedPageIndex: editor.pageIndex,\n newX: 0,\n newY: 0,\n newPageIndex: -1\n });\n }\n }\n endDragSession() {\n if (!this.#draggingEditors) {\n return false;\n }\n this.disableUserSelect(false);\n const map = this.#draggingEditors;\n this.#draggingEditors = null;\n let mustBeAddedInUndoStack = false;\n for (const [{\n x,\n y,\n pageIndex\n }, value] of map) {\n value.newX = x;\n value.newY = y;\n value.newPageIndex = pageIndex;\n mustBeAddedInUndoStack ||= x !== value.savedX || y !== value.savedY || pageIndex !== value.savedPageIndex;\n }\n if (!mustBeAddedInUndoStack) {\n return false;\n }\n const move = (editor, x, y, pageIndex) => {\n if (this.#allEditors.has(editor.id)) {\n const parent = this.#allLayers.get(pageIndex);\n if (parent) {\n editor._setParentAndPosition(parent, x, y);\n } else {\n editor.pageIndex = pageIndex;\n editor.x = x;\n editor.y = y;\n }\n }\n };\n this.addCommands({\n cmd: () => {\n for (const [editor, {\n newX,\n newY,\n newPageIndex\n }] of map) {\n move(editor, newX, newY, newPageIndex);\n }\n },\n undo: () => {\n for (const [editor, {\n savedX,\n savedY,\n savedPageIndex\n }] of map) {\n move(editor, savedX, savedY, savedPageIndex);\n }\n },\n mustExec: true\n });\n return true;\n }\n dragSelectedEditors(tx, ty) {\n if (!this.#draggingEditors) {\n return;\n }\n for (const editor of this.#draggingEditors.keys()) {\n editor.drag(tx, ty);\n }\n }\n rebuild(editor) {\n if (editor.parent === null) {\n const parent = this.getLayer(editor.pageIndex);\n if (parent) {\n parent.changeParent(editor);\n parent.addOrRebuild(editor);\n } else {\n this.addEditor(editor);\n this.addToAnnotationStorage(editor);\n editor.rebuild();\n }\n } else {\n editor.parent.addOrRebuild(editor);\n }\n }\n get isEditorHandlingKeyboard() {\n return this.getActive()?.shouldGetKeyboardEvents() || this.#selectedEditors.size === 1 && this.firstSelectedEditor.shouldGetKeyboardEvents();\n }\n isActive(editor) {\n return this.#activeEditor === editor;\n }\n getActive() {\n return this.#activeEditor;\n }\n getMode() {\n return this.#mode;\n }\n get imageManager() {\n return shadow(this, \"imageManager\", new ImageManager());\n }\n getSelectionBoxes(textLayer) {\n if (!textLayer) {\n return null;\n }\n const selection = document.getSelection();\n for (let i = 0, ii = selection.rangeCount; i < ii; i++) {\n if (!textLayer.contains(selection.getRangeAt(i).commonAncestorContainer)) {\n return null;\n }\n }\n const {\n x: layerX,\n y: layerY,\n width: parentWidth,\n height: parentHeight\n } = textLayer.getBoundingClientRect();\n let rotator;\n switch (textLayer.getAttribute(\"data-main-rotation\")) {\n case \"90\":\n rotator = (x, y, w, h) => ({\n x: (y - layerY) / parentHeight,\n y: 1 - (x + w - layerX) / parentWidth,\n width: h / parentHeight,\n height: w / parentWidth\n });\n break;\n case \"180\":\n rotator = (x, y, w, h) => ({\n x: 1 - (x + w - layerX) / parentWidth,\n y: 1 - (y + h - layerY) / parentHeight,\n width: w / parentWidth,\n height: h / parentHeight\n });\n break;\n case \"270\":\n rotator = (x, y, w, h) => ({\n x: 1 - (y + h - layerY) / parentHeight,\n y: (x - layerX) / parentWidth,\n width: h / parentHeight,\n height: w / parentWidth\n });\n break;\n default:\n rotator = (x, y, w, h) => ({\n x: (x - layerX) / parentWidth,\n y: (y - layerY) / parentHeight,\n width: w / parentWidth,\n height: h / parentHeight\n });\n break;\n }\n const boxes = [];\n for (let i = 0, ii = selection.rangeCount; i < ii; i++) {\n const range = selection.getRangeAt(i);\n if (range.collapsed) {\n continue;\n }\n for (const {\n x,\n y,\n width,\n height\n } of range.getClientRects()) {\n if (width === 0 || height === 0) {\n continue;\n }\n boxes.push(rotator(x, y, width, height));\n }\n }\n return boxes.length === 0 ? null : boxes;\n }\n addChangedExistingAnnotation({\n annotationElementId,\n id\n }) {\n (this.#changedExistingAnnotations ||= new Map()).set(annotationElementId, id);\n }\n removeChangedExistingAnnotation({\n annotationElementId\n }) {\n this.#changedExistingAnnotations?.delete(annotationElementId);\n }\n renderAnnotationElement(annotation) {\n const editorId = this.#changedExistingAnnotations?.get(annotation.data.id);\n if (!editorId) {\n return;\n }\n const editor = this.#annotationStorage.getRawValue(editorId);\n if (!editor) {\n return;\n }\n if (this.#mode === AnnotationEditorType.NONE && !editor.hasBeenModified) {\n return;\n }\n editor.renderAnnotationElement(annotation);\n }\n}\n\n;// ./src/display/editor/alt_text.js\n\nclass AltText {\n #altText = null;\n #altTextDecorative = false;\n #altTextButton = null;\n #altTextButtonLabel = null;\n #altTextTooltip = null;\n #altTextTooltipTimeout = null;\n #altTextWasFromKeyBoard = false;\n #badge = null;\n #editor = null;\n #guessedText = null;\n #textWithDisclaimer = null;\n #useNewAltTextFlow = false;\n static #l10nNewButton = null;\n static _l10n = null;\n constructor(editor) {\n this.#editor = editor;\n this.#useNewAltTextFlow = editor._uiManager.useNewAltTextFlow;\n AltText.#l10nNewButton ||= Object.freeze({\n added: \"pdfjs-editor-new-alt-text-added-button\",\n \"added-label\": \"pdfjs-editor-new-alt-text-added-button-label\",\n missing: \"pdfjs-editor-new-alt-text-missing-button\",\n \"missing-label\": \"pdfjs-editor-new-alt-text-missing-button-label\",\n review: \"pdfjs-editor-new-alt-text-to-review-button\",\n \"review-label\": \"pdfjs-editor-new-alt-text-to-review-button-label\"\n });\n }\n static initialize(l10n) {\n AltText._l10n ??= l10n;\n }\n async render() {\n const altText = this.#altTextButton = document.createElement(\"button\");\n altText.className = \"altText\";\n altText.tabIndex = \"0\";\n const label = this.#altTextButtonLabel = document.createElement(\"span\");\n altText.append(label);\n if (this.#useNewAltTextFlow) {\n altText.classList.add(\"new\");\n altText.setAttribute(\"data-l10n-id\", AltText.#l10nNewButton.missing);\n label.setAttribute(\"data-l10n-id\", AltText.#l10nNewButton[\"missing-label\"]);\n } else {\n altText.setAttribute(\"data-l10n-id\", \"pdfjs-editor-alt-text-button\");\n label.setAttribute(\"data-l10n-id\", \"pdfjs-editor-alt-text-button-label\");\n }\n const signal = this.#editor._uiManager._signal;\n altText.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n altText.addEventListener(\"pointerdown\", event => event.stopPropagation(), {\n signal\n });\n const onClick = event => {\n event.preventDefault();\n this.#editor._uiManager.editAltText(this.#editor);\n if (this.#useNewAltTextFlow) {\n this.#editor._reportTelemetry({\n action: \"pdfjs.image.alt_text.image_status_label_clicked\",\n data: {\n label: this.#label\n }\n });\n }\n };\n altText.addEventListener(\"click\", onClick, {\n capture: true,\n signal\n });\n altText.addEventListener(\"keydown\", event => {\n if (event.target === altText && event.key === \"Enter\") {\n this.#altTextWasFromKeyBoard = true;\n onClick(event);\n }\n }, {\n signal\n });\n await this.#setState();\n return altText;\n }\n get #label() {\n return this.#altText && \"added\" || this.#altText === null && this.guessedText && \"review\" || \"missing\";\n }\n finish() {\n if (!this.#altTextButton) {\n return;\n }\n this.#altTextButton.focus({\n focusVisible: this.#altTextWasFromKeyBoard\n });\n this.#altTextWasFromKeyBoard = false;\n }\n isEmpty() {\n if (this.#useNewAltTextFlow) {\n return this.#altText === null;\n }\n return !this.#altText && !this.#altTextDecorative;\n }\n hasData() {\n if (this.#useNewAltTextFlow) {\n return this.#altText !== null || !!this.#guessedText;\n }\n return this.isEmpty();\n }\n get guessedText() {\n return this.#guessedText;\n }\n async setGuessedText(guessedText) {\n if (this.#altText !== null) {\n return;\n }\n this.#guessedText = guessedText;\n this.#textWithDisclaimer = await AltText._l10n.get(\"pdfjs-editor-new-alt-text-generated-alt-text-with-disclaimer\", {\n generatedAltText: guessedText\n });\n this.#setState();\n }\n toggleAltTextBadge(visibility = false) {\n if (!this.#useNewAltTextFlow || this.#altText) {\n this.#badge?.remove();\n this.#badge = null;\n return;\n }\n if (!this.#badge) {\n const badge = this.#badge = document.createElement(\"div\");\n badge.className = \"noAltTextBadge\";\n this.#editor.div.append(badge);\n }\n this.#badge.classList.toggle(\"hidden\", !visibility);\n }\n serialize(isForCopying) {\n let altText = this.#altText;\n if (!isForCopying && this.#guessedText === altText) {\n altText = this.#textWithDisclaimer;\n }\n return {\n altText,\n decorative: this.#altTextDecorative,\n guessedText: this.#guessedText,\n textWithDisclaimer: this.#textWithDisclaimer\n };\n }\n get data() {\n return {\n altText: this.#altText,\n decorative: this.#altTextDecorative\n };\n }\n set data({\n altText,\n decorative,\n guessedText,\n textWithDisclaimer,\n cancel = false\n }) {\n if (guessedText) {\n this.#guessedText = guessedText;\n this.#textWithDisclaimer = textWithDisclaimer;\n }\n if (this.#altText === altText && this.#altTextDecorative === decorative) {\n return;\n }\n if (!cancel) {\n this.#altText = altText;\n this.#altTextDecorative = decorative;\n }\n this.#setState();\n }\n toggle(enabled = false) {\n if (!this.#altTextButton) {\n return;\n }\n if (!enabled && this.#altTextTooltipTimeout) {\n clearTimeout(this.#altTextTooltipTimeout);\n this.#altTextTooltipTimeout = null;\n }\n this.#altTextButton.disabled = !enabled;\n }\n shown() {\n this.#editor._reportTelemetry({\n action: \"pdfjs.image.alt_text.image_status_label_displayed\",\n data: {\n label: this.#label\n }\n });\n }\n destroy() {\n this.#altTextButton?.remove();\n this.#altTextButton = null;\n this.#altTextButtonLabel = null;\n this.#altTextTooltip = null;\n this.#badge?.remove();\n this.#badge = null;\n }\n async #setState() {\n const button = this.#altTextButton;\n if (!button) {\n return;\n }\n if (this.#useNewAltTextFlow) {\n button.classList.toggle(\"done\", !!this.#altText);\n button.setAttribute(\"data-l10n-id\", AltText.#l10nNewButton[this.#label]);\n this.#altTextButtonLabel?.setAttribute(\"data-l10n-id\", AltText.#l10nNewButton[`${this.#label}-label`]);\n if (!this.#altText) {\n this.#altTextTooltip?.remove();\n return;\n }\n } else {\n if (!this.#altText && !this.#altTextDecorative) {\n button.classList.remove(\"done\");\n this.#altTextTooltip?.remove();\n return;\n }\n button.classList.add(\"done\");\n button.setAttribute(\"data-l10n-id\", \"pdfjs-editor-alt-text-edit-button\");\n }\n let tooltip = this.#altTextTooltip;\n if (!tooltip) {\n this.#altTextTooltip = tooltip = document.createElement(\"span\");\n tooltip.className = \"tooltip\";\n tooltip.setAttribute(\"role\", \"tooltip\");\n tooltip.id = `alt-text-tooltip-${this.#editor.id}`;\n const DELAY_TO_SHOW_TOOLTIP = 100;\n const signal = this.#editor._uiManager._signal;\n signal.addEventListener(\"abort\", () => {\n clearTimeout(this.#altTextTooltipTimeout);\n this.#altTextTooltipTimeout = null;\n }, {\n once: true\n });\n button.addEventListener(\"mouseenter\", () => {\n this.#altTextTooltipTimeout = setTimeout(() => {\n this.#altTextTooltipTimeout = null;\n this.#altTextTooltip.classList.add(\"show\");\n this.#editor._reportTelemetry({\n action: \"alt_text_tooltip\"\n });\n }, DELAY_TO_SHOW_TOOLTIP);\n }, {\n signal\n });\n button.addEventListener(\"mouseleave\", () => {\n if (this.#altTextTooltipTimeout) {\n clearTimeout(this.#altTextTooltipTimeout);\n this.#altTextTooltipTimeout = null;\n }\n this.#altTextTooltip?.classList.remove(\"show\");\n }, {\n signal\n });\n }\n if (this.#altTextDecorative) {\n tooltip.setAttribute(\"data-l10n-id\", \"pdfjs-editor-alt-text-decorative-tooltip\");\n } else {\n tooltip.removeAttribute(\"data-l10n-id\");\n tooltip.textContent = this.#altText;\n }\n if (!tooltip.parentNode) {\n button.append(tooltip);\n }\n const element = this.#editor.getImageForAltText();\n element?.setAttribute(\"aria-describedby\", tooltip.id);\n }\n}\n\n;// ./src/display/touch_manager.js\n\n\nclass TouchManager {\n #container;\n #isPinching = false;\n #isPinchingStopped = null;\n #isPinchingDisabled;\n #onPinchStart;\n #onPinching;\n #onPinchEnd;\n #signal;\n #touchInfo = null;\n #touchManagerAC;\n #touchMoveAC = null;\n constructor({\n container,\n isPinchingDisabled = null,\n isPinchingStopped = null,\n onPinchStart = null,\n onPinching = null,\n onPinchEnd = null,\n signal\n }) {\n this.#container = container;\n this.#isPinchingStopped = isPinchingStopped;\n this.#isPinchingDisabled = isPinchingDisabled;\n this.#onPinchStart = onPinchStart;\n this.#onPinching = onPinching;\n this.#onPinchEnd = onPinchEnd;\n this.#touchManagerAC = new AbortController();\n this.#signal = AbortSignal.any([signal, this.#touchManagerAC.signal]);\n container.addEventListener(\"touchstart\", this.#onTouchStart.bind(this), {\n passive: false,\n signal: this.#signal\n });\n }\n get MIN_TOUCH_DISTANCE_TO_PINCH() {\n return shadow(this, \"MIN_TOUCH_DISTANCE_TO_PINCH\", 35 / (window.devicePixelRatio || 1));\n }\n #onTouchStart(evt) {\n if (this.#isPinchingDisabled?.() || evt.touches.length < 2) {\n return;\n }\n if (!this.#touchMoveAC) {\n this.#touchMoveAC = new AbortController();\n const signal = AbortSignal.any([this.#signal, this.#touchMoveAC.signal]);\n const container = this.#container;\n const opt = {\n signal,\n passive: false\n };\n container.addEventListener(\"touchmove\", this.#onTouchMove.bind(this), opt);\n container.addEventListener(\"touchend\", this.#onTouchEnd.bind(this), opt);\n container.addEventListener(\"touchcancel\", this.#onTouchEnd.bind(this), opt);\n this.#onPinchStart?.();\n }\n stopEvent(evt);\n if (evt.touches.length !== 2 || this.#isPinchingStopped?.()) {\n this.#touchInfo = null;\n return;\n }\n let [touch0, touch1] = evt.touches;\n if (touch0.identifier > touch1.identifier) {\n [touch0, touch1] = [touch1, touch0];\n }\n this.#touchInfo = {\n touch0X: touch0.screenX,\n touch0Y: touch0.screenY,\n touch1X: touch1.screenX,\n touch1Y: touch1.screenY\n };\n }\n #onTouchMove(evt) {\n if (!this.#touchInfo || evt.touches.length !== 2) {\n return;\n }\n let [touch0, touch1] = evt.touches;\n if (touch0.identifier > touch1.identifier) {\n [touch0, touch1] = [touch1, touch0];\n }\n const {\n screenX: screen0X,\n screenY: screen0Y\n } = touch0;\n const {\n screenX: screen1X,\n screenY: screen1Y\n } = touch1;\n const touchInfo = this.#touchInfo;\n const {\n touch0X: pTouch0X,\n touch0Y: pTouch0Y,\n touch1X: pTouch1X,\n touch1Y: pTouch1Y\n } = touchInfo;\n const prevGapX = pTouch1X - pTouch0X;\n const prevGapY = pTouch1Y - pTouch0Y;\n const currGapX = screen1X - screen0X;\n const currGapY = screen1Y - screen0Y;\n const distance = Math.hypot(currGapX, currGapY) || 1;\n const pDistance = Math.hypot(prevGapX, prevGapY) || 1;\n if (!this.#isPinching && Math.abs(pDistance - distance) <= TouchManager.MIN_TOUCH_DISTANCE_TO_PINCH) {\n return;\n }\n touchInfo.touch0X = screen0X;\n touchInfo.touch0Y = screen0Y;\n touchInfo.touch1X = screen1X;\n touchInfo.touch1Y = screen1Y;\n evt.preventDefault();\n if (!this.#isPinching) {\n this.#isPinching = true;\n return;\n }\n const origin = [(screen0X + screen1X) / 2, (screen0Y + screen1Y) / 2];\n this.#onPinching?.(origin, pDistance, distance);\n }\n #onTouchEnd(evt) {\n this.#touchMoveAC.abort();\n this.#touchMoveAC = null;\n this.#onPinchEnd?.();\n if (!this.#touchInfo) {\n return;\n }\n evt.preventDefault();\n this.#touchInfo = null;\n this.#isPinching = false;\n }\n destroy() {\n this.#touchManagerAC?.abort();\n this.#touchManagerAC = null;\n }\n}\n\n;// ./src/display/editor/editor.js\n\n\n\n\n\n\nclass AnnotationEditor {\n #accessibilityData = null;\n #allResizerDivs = null;\n #altText = null;\n #disabled = false;\n #dragPointerId = null;\n #dragPointerType = \"\";\n #keepAspectRatio = false;\n #resizersDiv = null;\n #lastPointerCoords = null;\n #savedDimensions = null;\n #focusAC = null;\n #focusedResizerName = \"\";\n #hasBeenClicked = false;\n #initialRect = null;\n #isEditing = false;\n #isInEditMode = false;\n #isResizerEnabledForKeyboard = false;\n #moveInDOMTimeout = null;\n #prevDragX = 0;\n #prevDragY = 0;\n #telemetryTimeouts = null;\n #touchManager = null;\n _editToolbar = null;\n _initialOptions = Object.create(null);\n _initialData = null;\n _isVisible = true;\n _uiManager = null;\n _focusEventsAllowed = true;\n static _l10n = null;\n static _l10nResizer = null;\n #isDraggable = false;\n #zIndex = AnnotationEditor._zIndex++;\n static _borderLineWidth = -1;\n static _colorManager = new ColorManager();\n static _zIndex = 1;\n static _telemetryTimeout = 1000;\n static get _resizerKeyboardManager() {\n const resize = AnnotationEditor.prototype._resizeWithKeyboard;\n const small = AnnotationEditorUIManager.TRANSLATE_SMALL;\n const big = AnnotationEditorUIManager.TRANSLATE_BIG;\n return shadow(this, \"_resizerKeyboardManager\", new KeyboardManager([[[\"ArrowLeft\", \"mac+ArrowLeft\"], resize, {\n args: [-small, 0]\n }], [[\"ctrl+ArrowLeft\", \"mac+shift+ArrowLeft\"], resize, {\n args: [-big, 0]\n }], [[\"ArrowRight\", \"mac+ArrowRight\"], resize, {\n args: [small, 0]\n }], [[\"ctrl+ArrowRight\", \"mac+shift+ArrowRight\"], resize, {\n args: [big, 0]\n }], [[\"ArrowUp\", \"mac+ArrowUp\"], resize, {\n args: [0, -small]\n }], [[\"ctrl+ArrowUp\", \"mac+shift+ArrowUp\"], resize, {\n args: [0, -big]\n }], [[\"ArrowDown\", \"mac+ArrowDown\"], resize, {\n args: [0, small]\n }], [[\"ctrl+ArrowDown\", \"mac+shift+ArrowDown\"], resize, {\n args: [0, big]\n }], [[\"Escape\", \"mac+Escape\"], AnnotationEditor.prototype._stopResizingWithKeyboard]]));\n }\n constructor(parameters) {\n this.parent = parameters.parent;\n this.id = parameters.id;\n this.width = this.height = null;\n this.pageIndex = parameters.parent.pageIndex;\n this.name = parameters.name;\n this.div = null;\n this._uiManager = parameters.uiManager;\n this.annotationElementId = null;\n this._willKeepAspectRatio = false;\n this._initialOptions.isCentered = parameters.isCentered;\n this._structTreeParentId = null;\n const {\n rotation,\n rawDims: {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n }\n } = this.parent.viewport;\n this.rotation = rotation;\n this.pageRotation = (360 + rotation - this._uiManager.viewParameters.rotation) % 360;\n this.pageDimensions = [pageWidth, pageHeight];\n this.pageTranslation = [pageX, pageY];\n const [width, height] = this.parentDimensions;\n this.x = parameters.x / width;\n this.y = parameters.y / height;\n this.isAttachedToDOM = false;\n this.deleted = false;\n }\n get editorType() {\n return Object.getPrototypeOf(this).constructor._type;\n }\n static get isDrawer() {\n return false;\n }\n static get _defaultLineColor() {\n return shadow(this, \"_defaultLineColor\", this._colorManager.getHexCode(\"CanvasText\"));\n }\n static deleteAnnotationElement(editor) {\n const fakeEditor = new FakeEditor({\n id: editor.parent.getNextId(),\n parent: editor.parent,\n uiManager: editor._uiManager\n });\n fakeEditor.annotationElementId = editor.annotationElementId;\n fakeEditor.deleted = true;\n fakeEditor._uiManager.addToAnnotationStorage(fakeEditor);\n }\n static initialize(l10n, _uiManager) {\n AnnotationEditor._l10n ??= l10n;\n AnnotationEditor._l10nResizer ||= Object.freeze({\n topLeft: \"pdfjs-editor-resizer-top-left\",\n topMiddle: \"pdfjs-editor-resizer-top-middle\",\n topRight: \"pdfjs-editor-resizer-top-right\",\n middleRight: \"pdfjs-editor-resizer-middle-right\",\n bottomRight: \"pdfjs-editor-resizer-bottom-right\",\n bottomMiddle: \"pdfjs-editor-resizer-bottom-middle\",\n bottomLeft: \"pdfjs-editor-resizer-bottom-left\",\n middleLeft: \"pdfjs-editor-resizer-middle-left\"\n });\n if (AnnotationEditor._borderLineWidth !== -1) {\n return;\n }\n const style = getComputedStyle(document.documentElement);\n AnnotationEditor._borderLineWidth = parseFloat(style.getPropertyValue(\"--outline-width\")) || 0;\n }\n static updateDefaultParams(_type, _value) {}\n static get defaultPropertiesToUpdate() {\n return [];\n }\n static isHandlingMimeForPasting(mime) {\n return false;\n }\n static paste(item, parent) {\n unreachable(\"Not implemented\");\n }\n get propertiesToUpdate() {\n return [];\n }\n get _isDraggable() {\n return this.#isDraggable;\n }\n set _isDraggable(value) {\n this.#isDraggable = value;\n this.div?.classList.toggle(\"draggable\", value);\n }\n get isEnterHandled() {\n return true;\n }\n center() {\n const [pageWidth, pageHeight] = this.pageDimensions;\n switch (this.parentRotation) {\n case 90:\n this.x -= this.height * pageHeight / (pageWidth * 2);\n this.y += this.width * pageWidth / (pageHeight * 2);\n break;\n case 180:\n this.x += this.width / 2;\n this.y += this.height / 2;\n break;\n case 270:\n this.x += this.height * pageHeight / (pageWidth * 2);\n this.y -= this.width * pageWidth / (pageHeight * 2);\n break;\n default:\n this.x -= this.width / 2;\n this.y -= this.height / 2;\n break;\n }\n this.fixAndSetPosition();\n }\n addCommands(params) {\n this._uiManager.addCommands(params);\n }\n get currentLayer() {\n return this._uiManager.currentLayer;\n }\n setInBackground() {\n this.div.style.zIndex = 0;\n }\n setInForeground() {\n this.div.style.zIndex = this.#zIndex;\n }\n setParent(parent) {\n if (parent !== null) {\n this.pageIndex = parent.pageIndex;\n this.pageDimensions = parent.pageDimensions;\n } else {\n this.#stopResizing();\n }\n this.parent = parent;\n }\n focusin(event) {\n if (!this._focusEventsAllowed) {\n return;\n }\n if (!this.#hasBeenClicked) {\n this.parent.setSelected(this);\n } else {\n this.#hasBeenClicked = false;\n }\n }\n focusout(event) {\n if (!this._focusEventsAllowed) {\n return;\n }\n if (!this.isAttachedToDOM) {\n return;\n }\n const target = event.relatedTarget;\n if (target?.closest(`#${this.id}`)) {\n return;\n }\n event.preventDefault();\n if (!this.parent?.isMultipleSelection) {\n this.commitOrRemove();\n }\n }\n commitOrRemove() {\n if (this.isEmpty()) {\n this.remove();\n } else {\n this.commit();\n }\n }\n commit() {\n this.addToAnnotationStorage();\n }\n addToAnnotationStorage() {\n this._uiManager.addToAnnotationStorage(this);\n }\n setAt(x, y, tx, ty) {\n const [width, height] = this.parentDimensions;\n [tx, ty] = this.screenToPageTranslation(tx, ty);\n this.x = (x + tx) / width;\n this.y = (y + ty) / height;\n this.fixAndSetPosition();\n }\n #translate([width, height], x, y) {\n [x, y] = this.screenToPageTranslation(x, y);\n this.x += x / width;\n this.y += y / height;\n this._onTranslating(this.x, this.y);\n this.fixAndSetPosition();\n }\n translate(x, y) {\n this.#translate(this.parentDimensions, x, y);\n }\n translateInPage(x, y) {\n this.#initialRect ||= [this.x, this.y, this.width, this.height];\n this.#translate(this.pageDimensions, x, y);\n this.div.scrollIntoView({\n block: \"nearest\"\n });\n }\n drag(tx, ty) {\n this.#initialRect ||= [this.x, this.y, this.width, this.height];\n const {\n div,\n parentDimensions: [parentWidth, parentHeight]\n } = this;\n this.x += tx / parentWidth;\n this.y += ty / parentHeight;\n if (this.parent && (this.x < 0 || this.x > 1 || this.y < 0 || this.y > 1)) {\n const {\n x,\n y\n } = this.div.getBoundingClientRect();\n if (this.parent.findNewParent(this, x, y)) {\n this.x -= Math.floor(this.x);\n this.y -= Math.floor(this.y);\n }\n }\n let {\n x,\n y\n } = this;\n const [bx, by] = this.getBaseTranslation();\n x += bx;\n y += by;\n const {\n style\n } = div;\n style.left = `${(100 * x).toFixed(2)}%`;\n style.top = `${(100 * y).toFixed(2)}%`;\n this._onTranslating(x, y);\n div.scrollIntoView({\n block: \"nearest\"\n });\n }\n _onTranslating(x, y) {}\n _onTranslated(x, y) {}\n get _hasBeenMoved() {\n return !!this.#initialRect && (this.#initialRect[0] !== this.x || this.#initialRect[1] !== this.y);\n }\n get _hasBeenResized() {\n return !!this.#initialRect && (this.#initialRect[2] !== this.width || this.#initialRect[3] !== this.height);\n }\n getBaseTranslation() {\n const [parentWidth, parentHeight] = this.parentDimensions;\n const {\n _borderLineWidth\n } = AnnotationEditor;\n const x = _borderLineWidth / parentWidth;\n const y = _borderLineWidth / parentHeight;\n switch (this.rotation) {\n case 90:\n return [-x, y];\n case 180:\n return [x, y];\n case 270:\n return [x, -y];\n default:\n return [-x, -y];\n }\n }\n get _mustFixPosition() {\n return true;\n }\n fixAndSetPosition(rotation = this.rotation) {\n const {\n div: {\n style\n },\n pageDimensions: [pageWidth, pageHeight]\n } = this;\n let {\n x,\n y,\n width,\n height\n } = this;\n width *= pageWidth;\n height *= pageHeight;\n x *= pageWidth;\n y *= pageHeight;\n if (this._mustFixPosition) {\n switch (rotation) {\n case 0:\n x = Math.max(0, Math.min(pageWidth - width, x));\n y = Math.max(0, Math.min(pageHeight - height, y));\n break;\n case 90:\n x = Math.max(0, Math.min(pageWidth - height, x));\n y = Math.min(pageHeight, Math.max(width, y));\n break;\n case 180:\n x = Math.min(pageWidth, Math.max(width, x));\n y = Math.min(pageHeight, Math.max(height, y));\n break;\n case 270:\n x = Math.min(pageWidth, Math.max(height, x));\n y = Math.max(0, Math.min(pageHeight - width, y));\n break;\n }\n }\n this.x = x /= pageWidth;\n this.y = y /= pageHeight;\n const [bx, by] = this.getBaseTranslation();\n x += bx;\n y += by;\n style.left = `${(100 * x).toFixed(2)}%`;\n style.top = `${(100 * y).toFixed(2)}%`;\n this.moveInDOM();\n }\n static #rotatePoint(x, y, angle) {\n switch (angle) {\n case 90:\n return [y, -x];\n case 180:\n return [-x, -y];\n case 270:\n return [-y, x];\n default:\n return [x, y];\n }\n }\n screenToPageTranslation(x, y) {\n return AnnotationEditor.#rotatePoint(x, y, this.parentRotation);\n }\n pageTranslationToScreen(x, y) {\n return AnnotationEditor.#rotatePoint(x, y, 360 - this.parentRotation);\n }\n #getRotationMatrix(rotation) {\n switch (rotation) {\n case 90:\n {\n const [pageWidth, pageHeight] = this.pageDimensions;\n return [0, -pageWidth / pageHeight, pageHeight / pageWidth, 0];\n }\n case 180:\n return [-1, 0, 0, -1];\n case 270:\n {\n const [pageWidth, pageHeight] = this.pageDimensions;\n return [0, pageWidth / pageHeight, -pageHeight / pageWidth, 0];\n }\n default:\n return [1, 0, 0, 1];\n }\n }\n get parentScale() {\n return this._uiManager.viewParameters.realScale;\n }\n get parentRotation() {\n return (this._uiManager.viewParameters.rotation + this.pageRotation) % 360;\n }\n get parentDimensions() {\n const {\n parentScale,\n pageDimensions: [pageWidth, pageHeight]\n } = this;\n return [pageWidth * parentScale, pageHeight * parentScale];\n }\n setDims(width, height) {\n const [parentWidth, parentHeight] = this.parentDimensions;\n const {\n style\n } = this.div;\n style.width = `${(100 * width / parentWidth).toFixed(2)}%`;\n if (!this.#keepAspectRatio) {\n style.height = `${(100 * height / parentHeight).toFixed(2)}%`;\n }\n }\n fixDims() {\n const {\n style\n } = this.div;\n const {\n height,\n width\n } = style;\n const widthPercent = width.endsWith(\"%\");\n const heightPercent = !this.#keepAspectRatio && height.endsWith(\"%\");\n if (widthPercent && heightPercent) {\n return;\n }\n const [parentWidth, parentHeight] = this.parentDimensions;\n if (!widthPercent) {\n style.width = `${(100 * parseFloat(width) / parentWidth).toFixed(2)}%`;\n }\n if (!this.#keepAspectRatio && !heightPercent) {\n style.height = `${(100 * parseFloat(height) / parentHeight).toFixed(2)}%`;\n }\n }\n getInitialTranslation() {\n return [0, 0];\n }\n #createResizers() {\n if (this.#resizersDiv) {\n return;\n }\n this.#resizersDiv = document.createElement(\"div\");\n this.#resizersDiv.classList.add(\"resizers\");\n const classes = this._willKeepAspectRatio ? [\"topLeft\", \"topRight\", \"bottomRight\", \"bottomLeft\"] : [\"topLeft\", \"topMiddle\", \"topRight\", \"middleRight\", \"bottomRight\", \"bottomMiddle\", \"bottomLeft\", \"middleLeft\"];\n const signal = this._uiManager._signal;\n for (const name of classes) {\n const div = document.createElement(\"div\");\n this.#resizersDiv.append(div);\n div.classList.add(\"resizer\", name);\n div.setAttribute(\"data-resizer-name\", name);\n div.addEventListener(\"pointerdown\", this.#resizerPointerdown.bind(this, name), {\n signal\n });\n div.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n div.tabIndex = -1;\n }\n this.div.prepend(this.#resizersDiv);\n }\n #resizerPointerdown(name, event) {\n event.preventDefault();\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.button !== 0 || event.ctrlKey && isMac) {\n return;\n }\n this.#altText?.toggle(false);\n const savedDraggable = this._isDraggable;\n this._isDraggable = false;\n this.#lastPointerCoords = [event.screenX, event.screenY];\n const ac = new AbortController();\n const signal = this._uiManager.combinedSignal(ac);\n this.parent.togglePointerEvents(false);\n window.addEventListener(\"pointermove\", this.#resizerPointermove.bind(this, name), {\n passive: true,\n capture: true,\n signal\n });\n window.addEventListener(\"touchmove\", stopEvent, {\n passive: false,\n signal\n });\n window.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n this.#savedDimensions = {\n savedX: this.x,\n savedY: this.y,\n savedWidth: this.width,\n savedHeight: this.height\n };\n const savedParentCursor = this.parent.div.style.cursor;\n const savedCursor = this.div.style.cursor;\n this.div.style.cursor = this.parent.div.style.cursor = window.getComputedStyle(event.target).cursor;\n const pointerUpCallback = () => {\n ac.abort();\n this.parent.togglePointerEvents(true);\n this.#altText?.toggle(true);\n this._isDraggable = savedDraggable;\n this.parent.div.style.cursor = savedParentCursor;\n this.div.style.cursor = savedCursor;\n this.#addResizeToUndoStack();\n };\n window.addEventListener(\"pointerup\", pointerUpCallback, {\n signal\n });\n window.addEventListener(\"blur\", pointerUpCallback, {\n signal\n });\n }\n #resize(x, y, width, height) {\n this.width = width;\n this.height = height;\n this.x = x;\n this.y = y;\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(parentWidth * width, parentHeight * height);\n this.fixAndSetPosition();\n this._onResized();\n }\n _onResized() {}\n #addResizeToUndoStack() {\n if (!this.#savedDimensions) {\n return;\n }\n const {\n savedX,\n savedY,\n savedWidth,\n savedHeight\n } = this.#savedDimensions;\n this.#savedDimensions = null;\n const newX = this.x;\n const newY = this.y;\n const newWidth = this.width;\n const newHeight = this.height;\n if (newX === savedX && newY === savedY && newWidth === savedWidth && newHeight === savedHeight) {\n return;\n }\n this.addCommands({\n cmd: this.#resize.bind(this, newX, newY, newWidth, newHeight),\n undo: this.#resize.bind(this, savedX, savedY, savedWidth, savedHeight),\n mustExec: true\n });\n }\n static _round(x) {\n return Math.round(x * 10000) / 10000;\n }\n #resizerPointermove(name, event) {\n const [parentWidth, parentHeight] = this.parentDimensions;\n const savedX = this.x;\n const savedY = this.y;\n const savedWidth = this.width;\n const savedHeight = this.height;\n const minWidth = AnnotationEditor.MIN_SIZE / parentWidth;\n const minHeight = AnnotationEditor.MIN_SIZE / parentHeight;\n const rotationMatrix = this.#getRotationMatrix(this.rotation);\n const transf = (x, y) => [rotationMatrix[0] * x + rotationMatrix[2] * y, rotationMatrix[1] * x + rotationMatrix[3] * y];\n const invRotationMatrix = this.#getRotationMatrix(360 - this.rotation);\n const invTransf = (x, y) => [invRotationMatrix[0] * x + invRotationMatrix[2] * y, invRotationMatrix[1] * x + invRotationMatrix[3] * y];\n let getPoint;\n let getOpposite;\n let isDiagonal = false;\n let isHorizontal = false;\n switch (name) {\n case \"topLeft\":\n isDiagonal = true;\n getPoint = (w, h) => [0, 0];\n getOpposite = (w, h) => [w, h];\n break;\n case \"topMiddle\":\n getPoint = (w, h) => [w / 2, 0];\n getOpposite = (w, h) => [w / 2, h];\n break;\n case \"topRight\":\n isDiagonal = true;\n getPoint = (w, h) => [w, 0];\n getOpposite = (w, h) => [0, h];\n break;\n case \"middleRight\":\n isHorizontal = true;\n getPoint = (w, h) => [w, h / 2];\n getOpposite = (w, h) => [0, h / 2];\n break;\n case \"bottomRight\":\n isDiagonal = true;\n getPoint = (w, h) => [w, h];\n getOpposite = (w, h) => [0, 0];\n break;\n case \"bottomMiddle\":\n getPoint = (w, h) => [w / 2, h];\n getOpposite = (w, h) => [w / 2, 0];\n break;\n case \"bottomLeft\":\n isDiagonal = true;\n getPoint = (w, h) => [0, h];\n getOpposite = (w, h) => [w, 0];\n break;\n case \"middleLeft\":\n isHorizontal = true;\n getPoint = (w, h) => [0, h / 2];\n getOpposite = (w, h) => [w, h / 2];\n break;\n }\n const point = getPoint(savedWidth, savedHeight);\n const oppositePoint = getOpposite(savedWidth, savedHeight);\n let transfOppositePoint = transf(...oppositePoint);\n const oppositeX = AnnotationEditor._round(savedX + transfOppositePoint[0]);\n const oppositeY = AnnotationEditor._round(savedY + transfOppositePoint[1]);\n let ratioX = 1;\n let ratioY = 1;\n let deltaX, deltaY;\n if (!event.fromKeyboard) {\n const {\n screenX,\n screenY\n } = event;\n const [lastScreenX, lastScreenY] = this.#lastPointerCoords;\n [deltaX, deltaY] = this.screenToPageTranslation(screenX - lastScreenX, screenY - lastScreenY);\n this.#lastPointerCoords[0] = screenX;\n this.#lastPointerCoords[1] = screenY;\n } else {\n ({\n deltaX,\n deltaY\n } = event);\n }\n [deltaX, deltaY] = invTransf(deltaX / parentWidth, deltaY / parentHeight);\n if (isDiagonal) {\n const oldDiag = Math.hypot(savedWidth, savedHeight);\n ratioX = ratioY = Math.max(Math.min(Math.hypot(oppositePoint[0] - point[0] - deltaX, oppositePoint[1] - point[1] - deltaY) / oldDiag, 1 / savedWidth, 1 / savedHeight), minWidth / savedWidth, minHeight / savedHeight);\n } else if (isHorizontal) {\n ratioX = Math.max(minWidth, Math.min(1, Math.abs(oppositePoint[0] - point[0] - deltaX))) / savedWidth;\n } else {\n ratioY = Math.max(minHeight, Math.min(1, Math.abs(oppositePoint[1] - point[1] - deltaY))) / savedHeight;\n }\n const newWidth = AnnotationEditor._round(savedWidth * ratioX);\n const newHeight = AnnotationEditor._round(savedHeight * ratioY);\n transfOppositePoint = transf(...getOpposite(newWidth, newHeight));\n const newX = oppositeX - transfOppositePoint[0];\n const newY = oppositeY - transfOppositePoint[1];\n this.#initialRect ||= [this.x, this.y, this.width, this.height];\n this.width = newWidth;\n this.height = newHeight;\n this.x = newX;\n this.y = newY;\n this.setDims(parentWidth * newWidth, parentHeight * newHeight);\n this.fixAndSetPosition();\n this._onResizing();\n }\n _onResizing() {}\n altTextFinish() {\n this.#altText?.finish();\n }\n async addEditToolbar() {\n if (this._editToolbar || this.#isInEditMode) {\n return this._editToolbar;\n }\n this._editToolbar = new EditorToolbar(this);\n this.div.append(this._editToolbar.render());\n if (this.#altText) {\n await this._editToolbar.addAltText(this.#altText);\n }\n return this._editToolbar;\n }\n removeEditToolbar() {\n if (!this._editToolbar) {\n return;\n }\n this._editToolbar.remove();\n this._editToolbar = null;\n this.#altText?.destroy();\n }\n addContainer(container) {\n const editToolbarDiv = this._editToolbar?.div;\n if (editToolbarDiv) {\n editToolbarDiv.before(container);\n } else {\n this.div.append(container);\n }\n }\n getClientDimensions() {\n return this.div.getBoundingClientRect();\n }\n async addAltTextButton() {\n if (this.#altText) {\n return;\n }\n AltText.initialize(AnnotationEditor._l10n);\n this.#altText = new AltText(this);\n if (this.#accessibilityData) {\n this.#altText.data = this.#accessibilityData;\n this.#accessibilityData = null;\n }\n await this.addEditToolbar();\n }\n get altTextData() {\n return this.#altText?.data;\n }\n set altTextData(data) {\n if (!this.#altText) {\n return;\n }\n this.#altText.data = data;\n }\n get guessedAltText() {\n return this.#altText?.guessedText;\n }\n async setGuessedAltText(text) {\n await this.#altText?.setGuessedText(text);\n }\n serializeAltText(isForCopying) {\n return this.#altText?.serialize(isForCopying);\n }\n hasAltText() {\n return !!this.#altText && !this.#altText.isEmpty();\n }\n hasAltTextData() {\n return this.#altText?.hasData() ?? false;\n }\n render() {\n this.div = document.createElement(\"div\");\n this.div.setAttribute(\"data-editor-rotation\", (360 - this.rotation) % 360);\n this.div.className = this.name;\n this.div.setAttribute(\"id\", this.id);\n this.div.tabIndex = this.#disabled ? -1 : 0;\n if (!this._isVisible) {\n this.div.classList.add(\"hidden\");\n }\n this.setInForeground();\n this.#addFocusListeners();\n const [parentWidth, parentHeight] = this.parentDimensions;\n if (this.parentRotation % 180 !== 0) {\n this.div.style.maxWidth = `${(100 * parentHeight / parentWidth).toFixed(2)}%`;\n this.div.style.maxHeight = `${(100 * parentWidth / parentHeight).toFixed(2)}%`;\n }\n const [tx, ty] = this.getInitialTranslation();\n this.translate(tx, ty);\n bindEvents(this, this.div, [\"pointerdown\"]);\n if (this.isResizable && this._uiManager._supportsPinchToZoom) {\n this.#touchManager ||= new TouchManager({\n container: this.div,\n isPinchingDisabled: () => !this.isSelected,\n onPinchStart: this.#touchPinchStartCallback.bind(this),\n onPinching: this.#touchPinchCallback.bind(this),\n onPinchEnd: this.#touchPinchEndCallback.bind(this),\n signal: this._uiManager._signal\n });\n }\n this._uiManager._editorUndoBar?.hide();\n return this.div;\n }\n #touchPinchStartCallback() {\n this.#savedDimensions = {\n savedX: this.x,\n savedY: this.y,\n savedWidth: this.width,\n savedHeight: this.height\n };\n this.#altText?.toggle(false);\n this.parent.togglePointerEvents(false);\n }\n #touchPinchCallback(_origin, prevDistance, distance) {\n const slowDownFactor = 0.7;\n let factor = slowDownFactor * (distance / prevDistance) + 1 - slowDownFactor;\n if (factor === 1) {\n return;\n }\n const rotationMatrix = this.#getRotationMatrix(this.rotation);\n const transf = (x, y) => [rotationMatrix[0] * x + rotationMatrix[2] * y, rotationMatrix[1] * x + rotationMatrix[3] * y];\n const [parentWidth, parentHeight] = this.parentDimensions;\n const savedX = this.x;\n const savedY = this.y;\n const savedWidth = this.width;\n const savedHeight = this.height;\n const minWidth = AnnotationEditor.MIN_SIZE / parentWidth;\n const minHeight = AnnotationEditor.MIN_SIZE / parentHeight;\n factor = Math.max(Math.min(factor, 1 / savedWidth, 1 / savedHeight), minWidth / savedWidth, minHeight / savedHeight);\n const newWidth = AnnotationEditor._round(savedWidth * factor);\n const newHeight = AnnotationEditor._round(savedHeight * factor);\n if (newWidth === savedWidth && newHeight === savedHeight) {\n return;\n }\n this.#initialRect ||= [savedX, savedY, savedWidth, savedHeight];\n const transfCenterPoint = transf(savedWidth / 2, savedHeight / 2);\n const centerX = AnnotationEditor._round(savedX + transfCenterPoint[0]);\n const centerY = AnnotationEditor._round(savedY + transfCenterPoint[1]);\n const newTransfCenterPoint = transf(newWidth / 2, newHeight / 2);\n this.x = centerX - newTransfCenterPoint[0];\n this.y = centerY - newTransfCenterPoint[1];\n this.width = newWidth;\n this.height = newHeight;\n this.setDims(parentWidth * newWidth, parentHeight * newHeight);\n this.fixAndSetPosition();\n this._onResizing();\n }\n #touchPinchEndCallback() {\n this.#altText?.toggle(true);\n this.parent.togglePointerEvents(true);\n this.#addResizeToUndoStack();\n }\n pointerdown(event) {\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.button !== 0 || event.ctrlKey && isMac) {\n event.preventDefault();\n return;\n }\n this.#hasBeenClicked = true;\n if (this._isDraggable) {\n this.#setUpDragSession(event);\n return;\n }\n this.#selectOnPointerEvent(event);\n }\n get isSelected() {\n return this._uiManager.isSelected(this);\n }\n #selectOnPointerEvent(event) {\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.ctrlKey && !isMac || event.shiftKey || event.metaKey && isMac) {\n this.parent.toggleSelected(this);\n } else {\n this.parent.setSelected(this);\n }\n }\n #setUpDragSession(event) {\n const {\n isSelected\n } = this;\n this._uiManager.setUpDragSession();\n let hasDraggingStarted = false;\n const ac = new AbortController();\n const signal = this._uiManager.combinedSignal(ac);\n const opts = {\n capture: true,\n passive: false,\n signal\n };\n const cancelDrag = e => {\n ac.abort();\n this.#dragPointerId = null;\n this.#hasBeenClicked = false;\n if (!this._uiManager.endDragSession()) {\n this.#selectOnPointerEvent(e);\n }\n if (hasDraggingStarted) {\n this._onStopDragging();\n }\n };\n if (isSelected) {\n this.#prevDragX = event.clientX;\n this.#prevDragY = event.clientY;\n this.#dragPointerId = event.pointerId;\n this.#dragPointerType = event.pointerType;\n window.addEventListener(\"pointermove\", e => {\n if (!hasDraggingStarted) {\n hasDraggingStarted = true;\n this._onStartDragging();\n }\n const {\n clientX: x,\n clientY: y,\n pointerId\n } = e;\n if (pointerId !== this.#dragPointerId) {\n stopEvent(e);\n return;\n }\n const [tx, ty] = this.screenToPageTranslation(x - this.#prevDragX, y - this.#prevDragY);\n this.#prevDragX = x;\n this.#prevDragY = y;\n this._uiManager.dragSelectedEditors(tx, ty);\n }, opts);\n window.addEventListener(\"touchmove\", stopEvent, opts);\n window.addEventListener(\"pointerdown\", e => {\n if (e.pointerType === this.#dragPointerType) {\n if (this.#touchManager || e.isPrimary) {\n cancelDrag(e);\n }\n }\n stopEvent(e);\n }, opts);\n }\n const pointerUpCallback = e => {\n if (!this.#dragPointerId || this.#dragPointerId === e.pointerId) {\n cancelDrag(e);\n return;\n }\n stopEvent(e);\n };\n window.addEventListener(\"pointerup\", pointerUpCallback, {\n signal\n });\n window.addEventListener(\"blur\", pointerUpCallback, {\n signal\n });\n }\n _onStartDragging() {}\n _onStopDragging() {}\n moveInDOM() {\n if (this.#moveInDOMTimeout) {\n clearTimeout(this.#moveInDOMTimeout);\n }\n this.#moveInDOMTimeout = setTimeout(() => {\n this.#moveInDOMTimeout = null;\n this.parent?.moveEditorInDOM(this);\n }, 0);\n }\n _setParentAndPosition(parent, x, y) {\n parent.changeParent(this);\n this.x = x;\n this.y = y;\n this.fixAndSetPosition();\n this._onTranslated();\n }\n getRect(tx, ty, rotation = this.rotation) {\n const scale = this.parentScale;\n const [pageWidth, pageHeight] = this.pageDimensions;\n const [pageX, pageY] = this.pageTranslation;\n const shiftX = tx / scale;\n const shiftY = ty / scale;\n const x = this.x * pageWidth;\n const y = this.y * pageHeight;\n const width = this.width * pageWidth;\n const height = this.height * pageHeight;\n switch (rotation) {\n case 0:\n return [x + shiftX + pageX, pageHeight - y - shiftY - height + pageY, x + shiftX + width + pageX, pageHeight - y - shiftY + pageY];\n case 90:\n return [x + shiftY + pageX, pageHeight - y + shiftX + pageY, x + shiftY + height + pageX, pageHeight - y + shiftX + width + pageY];\n case 180:\n return [x - shiftX - width + pageX, pageHeight - y + shiftY + pageY, x - shiftX + pageX, pageHeight - y + shiftY + height + pageY];\n case 270:\n return [x - shiftY - height + pageX, pageHeight - y - shiftX - width + pageY, x - shiftY + pageX, pageHeight - y - shiftX + pageY];\n default:\n throw new Error(\"Invalid rotation\");\n }\n }\n getRectInCurrentCoords(rect, pageHeight) {\n const [x1, y1, x2, y2] = rect;\n const width = x2 - x1;\n const height = y2 - y1;\n switch (this.rotation) {\n case 0:\n return [x1, pageHeight - y2, width, height];\n case 90:\n return [x1, pageHeight - y1, height, width];\n case 180:\n return [x2, pageHeight - y1, width, height];\n case 270:\n return [x2, pageHeight - y2, height, width];\n default:\n throw new Error(\"Invalid rotation\");\n }\n }\n onceAdded(focus) {}\n isEmpty() {\n return false;\n }\n enableEditMode() {\n this.#isInEditMode = true;\n }\n disableEditMode() {\n this.#isInEditMode = false;\n }\n isInEditMode() {\n return this.#isInEditMode;\n }\n shouldGetKeyboardEvents() {\n return this.#isResizerEnabledForKeyboard;\n }\n needsToBeRebuilt() {\n return this.div && !this.isAttachedToDOM;\n }\n get isOnScreen() {\n const {\n top,\n left,\n bottom,\n right\n } = this.getClientDimensions();\n const {\n innerHeight,\n innerWidth\n } = window;\n return left < innerWidth && right > 0 && top < innerHeight && bottom > 0;\n }\n #addFocusListeners() {\n if (this.#focusAC || !this.div) {\n return;\n }\n this.#focusAC = new AbortController();\n const signal = this._uiManager.combinedSignal(this.#focusAC);\n this.div.addEventListener(\"focusin\", this.focusin.bind(this), {\n signal\n });\n this.div.addEventListener(\"focusout\", this.focusout.bind(this), {\n signal\n });\n }\n rebuild() {\n this.#addFocusListeners();\n }\n rotate(_angle) {}\n resize() {}\n serializeDeleted() {\n return {\n id: this.annotationElementId,\n deleted: true,\n pageIndex: this.pageIndex,\n popupRef: this._initialData?.popupRef || \"\"\n };\n }\n serialize(isForCopying = false, context = null) {\n unreachable(\"An editor must be serializable\");\n }\n static async deserialize(data, parent, uiManager) {\n const editor = new this.prototype.constructor({\n parent,\n id: parent.getNextId(),\n uiManager\n });\n editor.rotation = data.rotation;\n editor.#accessibilityData = data.accessibilityData;\n const [pageWidth, pageHeight] = editor.pageDimensions;\n const [x, y, width, height] = editor.getRectInCurrentCoords(data.rect, pageHeight);\n editor.x = x / pageWidth;\n editor.y = y / pageHeight;\n editor.width = width / pageWidth;\n editor.height = height / pageHeight;\n return editor;\n }\n get hasBeenModified() {\n return !!this.annotationElementId && (this.deleted || this.serialize() !== null);\n }\n remove() {\n this.#focusAC?.abort();\n this.#focusAC = null;\n if (!this.isEmpty()) {\n this.commit();\n }\n if (this.parent) {\n this.parent.remove(this);\n } else {\n this._uiManager.removeEditor(this);\n }\n if (this.#moveInDOMTimeout) {\n clearTimeout(this.#moveInDOMTimeout);\n this.#moveInDOMTimeout = null;\n }\n this.#stopResizing();\n this.removeEditToolbar();\n if (this.#telemetryTimeouts) {\n for (const timeout of this.#telemetryTimeouts.values()) {\n clearTimeout(timeout);\n }\n this.#telemetryTimeouts = null;\n }\n this.parent = null;\n this.#touchManager?.destroy();\n this.#touchManager = null;\n }\n get isResizable() {\n return false;\n }\n makeResizable() {\n if (this.isResizable) {\n this.#createResizers();\n this.#resizersDiv.classList.remove(\"hidden\");\n bindEvents(this, this.div, [\"keydown\"]);\n }\n }\n get toolbarPosition() {\n return null;\n }\n keydown(event) {\n if (!this.isResizable || event.target !== this.div || event.key !== \"Enter\") {\n return;\n }\n this._uiManager.setSelected(this);\n this.#savedDimensions = {\n savedX: this.x,\n savedY: this.y,\n savedWidth: this.width,\n savedHeight: this.height\n };\n const children = this.#resizersDiv.children;\n if (!this.#allResizerDivs) {\n this.#allResizerDivs = Array.from(children);\n const boundResizerKeydown = this.#resizerKeydown.bind(this);\n const boundResizerBlur = this.#resizerBlur.bind(this);\n const signal = this._uiManager._signal;\n for (const div of this.#allResizerDivs) {\n const name = div.getAttribute(\"data-resizer-name\");\n div.setAttribute(\"role\", \"spinbutton\");\n div.addEventListener(\"keydown\", boundResizerKeydown, {\n signal\n });\n div.addEventListener(\"blur\", boundResizerBlur, {\n signal\n });\n div.addEventListener(\"focus\", this.#resizerFocus.bind(this, name), {\n signal\n });\n div.setAttribute(\"data-l10n-id\", AnnotationEditor._l10nResizer[name]);\n }\n }\n const first = this.#allResizerDivs[0];\n let firstPosition = 0;\n for (const div of children) {\n if (div === first) {\n break;\n }\n firstPosition++;\n }\n const nextFirstPosition = (360 - this.rotation + this.parentRotation) % 360 / 90 * (this.#allResizerDivs.length / 4);\n if (nextFirstPosition !== firstPosition) {\n if (nextFirstPosition < firstPosition) {\n for (let i = 0; i < firstPosition - nextFirstPosition; i++) {\n this.#resizersDiv.append(this.#resizersDiv.firstChild);\n }\n } else if (nextFirstPosition > firstPosition) {\n for (let i = 0; i < nextFirstPosition - firstPosition; i++) {\n this.#resizersDiv.firstChild.before(this.#resizersDiv.lastChild);\n }\n }\n let i = 0;\n for (const child of children) {\n const div = this.#allResizerDivs[i++];\n const name = div.getAttribute(\"data-resizer-name\");\n child.setAttribute(\"data-l10n-id\", AnnotationEditor._l10nResizer[name]);\n }\n }\n this.#setResizerTabIndex(0);\n this.#isResizerEnabledForKeyboard = true;\n this.#resizersDiv.firstChild.focus({\n focusVisible: true\n });\n event.preventDefault();\n event.stopImmediatePropagation();\n }\n #resizerKeydown(event) {\n AnnotationEditor._resizerKeyboardManager.exec(this, event);\n }\n #resizerBlur(event) {\n if (this.#isResizerEnabledForKeyboard && event.relatedTarget?.parentNode !== this.#resizersDiv) {\n this.#stopResizing();\n }\n }\n #resizerFocus(name) {\n this.#focusedResizerName = this.#isResizerEnabledForKeyboard ? name : \"\";\n }\n #setResizerTabIndex(value) {\n if (!this.#allResizerDivs) {\n return;\n }\n for (const div of this.#allResizerDivs) {\n div.tabIndex = value;\n }\n }\n _resizeWithKeyboard(x, y) {\n if (!this.#isResizerEnabledForKeyboard) {\n return;\n }\n this.#resizerPointermove(this.#focusedResizerName, {\n deltaX: x,\n deltaY: y,\n fromKeyboard: true\n });\n }\n #stopResizing() {\n this.#isResizerEnabledForKeyboard = false;\n this.#setResizerTabIndex(-1);\n this.#addResizeToUndoStack();\n }\n _stopResizingWithKeyboard() {\n this.#stopResizing();\n this.div.focus();\n }\n select() {\n this.makeResizable();\n this.div?.classList.add(\"selectedEditor\");\n if (!this._editToolbar) {\n this.addEditToolbar().then(() => {\n if (this.div?.classList.contains(\"selectedEditor\")) {\n this._editToolbar?.show();\n }\n });\n return;\n }\n this._editToolbar?.show();\n this.#altText?.toggleAltTextBadge(false);\n }\n unselect() {\n this.#resizersDiv?.classList.add(\"hidden\");\n this.div?.classList.remove(\"selectedEditor\");\n if (this.div?.contains(document.activeElement)) {\n this._uiManager.currentLayer.div.focus({\n preventScroll: true\n });\n }\n this._editToolbar?.hide();\n this.#altText?.toggleAltTextBadge(true);\n }\n updateParams(type, value) {}\n disableEditing() {}\n enableEditing() {}\n enterInEditMode() {}\n getImageForAltText() {\n return null;\n }\n get contentDiv() {\n return this.div;\n }\n get isEditing() {\n return this.#isEditing;\n }\n set isEditing(value) {\n this.#isEditing = value;\n if (!this.parent) {\n return;\n }\n if (value) {\n this.parent.setSelected(this);\n this.parent.setActiveEditor(this);\n } else {\n this.parent.setActiveEditor(null);\n }\n }\n setAspectRatio(width, height) {\n this.#keepAspectRatio = true;\n const aspectRatio = width / height;\n const {\n style\n } = this.div;\n style.aspectRatio = aspectRatio;\n style.height = \"auto\";\n }\n static get MIN_SIZE() {\n return 16;\n }\n static canCreateNewEmptyEditor() {\n return true;\n }\n get telemetryInitialData() {\n return {\n action: \"added\"\n };\n }\n get telemetryFinalData() {\n return null;\n }\n _reportTelemetry(data, mustWait = false) {\n if (mustWait) {\n this.#telemetryTimeouts ||= new Map();\n const {\n action\n } = data;\n let timeout = this.#telemetryTimeouts.get(action);\n if (timeout) {\n clearTimeout(timeout);\n }\n timeout = setTimeout(() => {\n this._reportTelemetry(data);\n this.#telemetryTimeouts.delete(action);\n if (this.#telemetryTimeouts.size === 0) {\n this.#telemetryTimeouts = null;\n }\n }, AnnotationEditor._telemetryTimeout);\n this.#telemetryTimeouts.set(action, timeout);\n return;\n }\n data.type ||= this.editorType;\n this._uiManager._eventBus.dispatch(\"reporttelemetry\", {\n source: this,\n details: {\n type: \"editing\",\n data\n }\n });\n }\n show(visible = this._isVisible) {\n this.div.classList.toggle(\"hidden\", !visible);\n this._isVisible = visible;\n }\n enable() {\n if (this.div) {\n this.div.tabIndex = 0;\n }\n this.#disabled = false;\n }\n disable() {\n if (this.div) {\n this.div.tabIndex = -1;\n }\n this.#disabled = true;\n }\n renderAnnotationElement(annotation) {\n let content = annotation.container.querySelector(\".annotationContent\");\n if (!content) {\n content = document.createElement(\"div\");\n content.classList.add(\"annotationContent\", this.editorType);\n annotation.container.prepend(content);\n } else if (content.nodeName === \"CANVAS\") {\n const canvas = content;\n content = document.createElement(\"div\");\n content.classList.add(\"annotationContent\", this.editorType);\n canvas.before(content);\n }\n return content;\n }\n resetAnnotationElement(annotation) {\n const {\n firstChild\n } = annotation.container;\n if (firstChild?.nodeName === \"DIV\" && firstChild.classList.contains(\"annotationContent\")) {\n firstChild.remove();\n }\n }\n}\nclass FakeEditor extends AnnotationEditor {\n constructor(params) {\n super(params);\n this.annotationElementId = params.annotationElementId;\n this.deleted = true;\n }\n serialize() {\n return this.serializeDeleted();\n }\n}\n\n;// ./src/shared/murmurhash3.js\nconst SEED = 0xc3d2e1f0;\nconst MASK_HIGH = 0xffff0000;\nconst MASK_LOW = 0xffff;\nclass MurmurHash3_64 {\n constructor(seed) {\n this.h1 = seed ? seed & 0xffffffff : SEED;\n this.h2 = seed ? seed & 0xffffffff : SEED;\n }\n update(input) {\n let data, length;\n if (typeof input === \"string\") {\n data = new Uint8Array(input.length * 2);\n length = 0;\n for (let i = 0, ii = input.length; i < ii; i++) {\n const code = input.charCodeAt(i);\n if (code <= 0xff) {\n data[length++] = code;\n } else {\n data[length++] = code >>> 8;\n data[length++] = code & 0xff;\n }\n }\n } else if (ArrayBuffer.isView(input)) {\n data = input.slice();\n length = data.byteLength;\n } else {\n throw new Error(\"Invalid data format, must be a string or TypedArray.\");\n }\n const blockCounts = length >> 2;\n const tailLength = length - blockCounts * 4;\n const dataUint32 = new Uint32Array(data.buffer, 0, blockCounts);\n let k1 = 0,\n k2 = 0;\n let h1 = this.h1,\n h2 = this.h2;\n const C1 = 0xcc9e2d51,\n C2 = 0x1b873593;\n const C1_LOW = C1 & MASK_LOW,\n C2_LOW = C2 & MASK_LOW;\n for (let i = 0; i < blockCounts; i++) {\n if (i & 1) {\n k1 = dataUint32[i];\n k1 = k1 * C1 & MASK_HIGH | k1 * C1_LOW & MASK_LOW;\n k1 = k1 << 15 | k1 >>> 17;\n k1 = k1 * C2 & MASK_HIGH | k1 * C2_LOW & MASK_LOW;\n h1 ^= k1;\n h1 = h1 << 13 | h1 >>> 19;\n h1 = h1 * 5 + 0xe6546b64;\n } else {\n k2 = dataUint32[i];\n k2 = k2 * C1 & MASK_HIGH | k2 * C1_LOW & MASK_LOW;\n k2 = k2 << 15 | k2 >>> 17;\n k2 = k2 * C2 & MASK_HIGH | k2 * C2_LOW & MASK_LOW;\n h2 ^= k2;\n h2 = h2 << 13 | h2 >>> 19;\n h2 = h2 * 5 + 0xe6546b64;\n }\n }\n k1 = 0;\n switch (tailLength) {\n case 3:\n k1 ^= data[blockCounts * 4 + 2] << 16;\n case 2:\n k1 ^= data[blockCounts * 4 + 1] << 8;\n case 1:\n k1 ^= data[blockCounts * 4];\n k1 = k1 * C1 & MASK_HIGH | k1 * C1_LOW & MASK_LOW;\n k1 = k1 << 15 | k1 >>> 17;\n k1 = k1 * C2 & MASK_HIGH | k1 * C2_LOW & MASK_LOW;\n if (blockCounts & 1) {\n h1 ^= k1;\n } else {\n h2 ^= k1;\n }\n }\n this.h1 = h1;\n this.h2 = h2;\n }\n hexdigest() {\n let h1 = this.h1,\n h2 = this.h2;\n h1 ^= h2 >>> 1;\n h1 = h1 * 0xed558ccd & MASK_HIGH | h1 * 0x8ccd & MASK_LOW;\n h2 = h2 * 0xff51afd7 & MASK_HIGH | ((h2 << 16 | h1 >>> 16) * 0xafd7ed55 & MASK_HIGH) >>> 16;\n h1 ^= h2 >>> 1;\n h1 = h1 * 0x1a85ec53 & MASK_HIGH | h1 * 0xec53 & MASK_LOW;\n h2 = h2 * 0xc4ceb9fe & MASK_HIGH | ((h2 << 16 | h1 >>> 16) * 0xb9fe1a85 & MASK_HIGH) >>> 16;\n h1 ^= h2 >>> 1;\n return (h1 >>> 0).toString(16).padStart(8, \"0\") + (h2 >>> 0).toString(16).padStart(8, \"0\");\n }\n}\n\n;// ./src/display/annotation_storage.js\n\n\n\nconst SerializableEmpty = Object.freeze({\n map: null,\n hash: \"\",\n transfer: undefined\n});\nclass AnnotationStorage {\n #modified = false;\n #modifiedIds = null;\n #storage = new Map();\n constructor() {\n this.onSetModified = null;\n this.onResetModified = null;\n this.onAnnotationEditor = null;\n }\n getValue(key, defaultValue) {\n const value = this.#storage.get(key);\n if (value === undefined) {\n return defaultValue;\n }\n return Object.assign(defaultValue, value);\n }\n getRawValue(key) {\n return this.#storage.get(key);\n }\n remove(key) {\n this.#storage.delete(key);\n if (this.#storage.size === 0) {\n this.resetModified();\n }\n if (typeof this.onAnnotationEditor === \"function\") {\n for (const value of this.#storage.values()) {\n if (value instanceof AnnotationEditor) {\n return;\n }\n }\n this.onAnnotationEditor(null);\n }\n }\n setValue(key, value) {\n const obj = this.#storage.get(key);\n let modified = false;\n if (obj !== undefined) {\n for (const [entry, val] of Object.entries(value)) {\n if (obj[entry] !== val) {\n modified = true;\n obj[entry] = val;\n }\n }\n } else {\n modified = true;\n this.#storage.set(key, value);\n }\n if (modified) {\n this.#setModified();\n }\n if (value instanceof AnnotationEditor && typeof this.onAnnotationEditor === \"function\") {\n this.onAnnotationEditor(value.constructor._type);\n }\n }\n has(key) {\n return this.#storage.has(key);\n }\n getAll() {\n return this.#storage.size > 0 ? objectFromMap(this.#storage) : null;\n }\n setAll(obj) {\n for (const [key, val] of Object.entries(obj)) {\n this.setValue(key, val);\n }\n }\n get size() {\n return this.#storage.size;\n }\n #setModified() {\n if (!this.#modified) {\n this.#modified = true;\n if (typeof this.onSetModified === \"function\") {\n this.onSetModified();\n }\n }\n }\n resetModified() {\n if (this.#modified) {\n this.#modified = false;\n if (typeof this.onResetModified === \"function\") {\n this.onResetModified();\n }\n }\n }\n get print() {\n return new PrintAnnotationStorage(this);\n }\n get serializable() {\n if (this.#storage.size === 0) {\n return SerializableEmpty;\n }\n const map = new Map(),\n hash = new MurmurHash3_64(),\n transfer = [];\n const context = Object.create(null);\n let hasBitmap = false;\n for (const [key, val] of this.#storage) {\n const serialized = val instanceof AnnotationEditor ? val.serialize(false, context) : val;\n if (serialized) {\n map.set(key, serialized);\n hash.update(`${key}:${JSON.stringify(serialized)}`);\n hasBitmap ||= !!serialized.bitmap;\n }\n }\n if (hasBitmap) {\n for (const value of map.values()) {\n if (value.bitmap) {\n transfer.push(value.bitmap);\n }\n }\n }\n return map.size > 0 ? {\n map,\n hash: hash.hexdigest(),\n transfer\n } : SerializableEmpty;\n }\n get editorStats() {\n let stats = null;\n const typeToEditor = new Map();\n for (const value of this.#storage.values()) {\n if (!(value instanceof AnnotationEditor)) {\n continue;\n }\n const editorStats = value.telemetryFinalData;\n if (!editorStats) {\n continue;\n }\n const {\n type\n } = editorStats;\n if (!typeToEditor.has(type)) {\n typeToEditor.set(type, Object.getPrototypeOf(value).constructor);\n }\n stats ||= Object.create(null);\n const map = stats[type] ||= new Map();\n for (const [key, val] of Object.entries(editorStats)) {\n if (key === \"type\") {\n continue;\n }\n let counters = map.get(key);\n if (!counters) {\n counters = new Map();\n map.set(key, counters);\n }\n const count = counters.get(val) ?? 0;\n counters.set(val, count + 1);\n }\n }\n for (const [type, editor] of typeToEditor) {\n stats[type] = editor.computeTelemetryFinalData(stats[type]);\n }\n return stats;\n }\n resetModifiedIds() {\n this.#modifiedIds = null;\n }\n get modifiedIds() {\n if (this.#modifiedIds) {\n return this.#modifiedIds;\n }\n const ids = [];\n for (const value of this.#storage.values()) {\n if (!(value instanceof AnnotationEditor) || !value.annotationElementId || !value.serialize()) {\n continue;\n }\n ids.push(value.annotationElementId);\n }\n return this.#modifiedIds = {\n ids: new Set(ids),\n hash: ids.join(\",\")\n };\n }\n}\nclass PrintAnnotationStorage extends AnnotationStorage {\n #serializable;\n constructor(parent) {\n super();\n const {\n map,\n hash,\n transfer\n } = parent.serializable;\n const clone = structuredClone(map, transfer ? {\n transfer\n } : null);\n this.#serializable = {\n map: clone,\n hash,\n transfer\n };\n }\n get print() {\n unreachable(\"Should not call PrintAnnotationStorage.print\");\n }\n get serializable() {\n return this.#serializable;\n }\n get modifiedIds() {\n return shadow(this, \"modifiedIds\", {\n ids: new Set(),\n hash: \"\"\n });\n }\n}\n\n;// ./src/display/font_loader.js\n\nclass FontLoader {\n #systemFonts = new Set();\n constructor({\n ownerDocument = globalThis.document,\n styleElement = null\n }) {\n this._document = ownerDocument;\n this.nativeFontFaces = new Set();\n this.styleElement = null;\n this.loadingRequests = [];\n this.loadTestFontId = 0;\n }\n addNativeFontFace(nativeFontFace) {\n this.nativeFontFaces.add(nativeFontFace);\n this._document.fonts.add(nativeFontFace);\n }\n removeNativeFontFace(nativeFontFace) {\n this.nativeFontFaces.delete(nativeFontFace);\n this._document.fonts.delete(nativeFontFace);\n }\n insertRule(rule) {\n if (!this.styleElement) {\n this.styleElement = this._document.createElement(\"style\");\n this._document.documentElement.getElementsByTagName(\"head\")[0].append(this.styleElement);\n }\n const styleSheet = this.styleElement.sheet;\n styleSheet.insertRule(rule, styleSheet.cssRules.length);\n }\n clear() {\n for (const nativeFontFace of this.nativeFontFaces) {\n this._document.fonts.delete(nativeFontFace);\n }\n this.nativeFontFaces.clear();\n this.#systemFonts.clear();\n if (this.styleElement) {\n this.styleElement.remove();\n this.styleElement = null;\n }\n }\n async loadSystemFont({\n systemFontInfo: info,\n _inspectFont\n }) {\n if (!info || this.#systemFonts.has(info.loadedName)) {\n return;\n }\n assert(!this.disableFontFace, \"loadSystemFont shouldn't be called when `disableFontFace` is set.\");\n if (this.isFontLoadingAPISupported) {\n const {\n loadedName,\n src,\n style\n } = info;\n const fontFace = new FontFace(loadedName, src, style);\n this.addNativeFontFace(fontFace);\n try {\n await fontFace.load();\n this.#systemFonts.add(loadedName);\n _inspectFont?.(info);\n } catch {\n warn(`Cannot load system font: ${info.baseFontName}, installing it could help to improve PDF rendering.`);\n this.removeNativeFontFace(fontFace);\n }\n return;\n }\n unreachable(\"Not implemented: loadSystemFont without the Font Loading API.\");\n }\n async bind(font) {\n if (font.attached || font.missingFile && !font.systemFontInfo) {\n return;\n }\n font.attached = true;\n if (font.systemFontInfo) {\n await this.loadSystemFont(font);\n return;\n }\n if (this.isFontLoadingAPISupported) {\n const nativeFontFace = font.createNativeFontFace();\n if (nativeFontFace) {\n this.addNativeFontFace(nativeFontFace);\n try {\n await nativeFontFace.loaded;\n } catch (ex) {\n warn(`Failed to load font '${nativeFontFace.family}': '${ex}'.`);\n font.disableFontFace = true;\n throw ex;\n }\n }\n return;\n }\n const rule = font.createFontFaceRule();\n if (rule) {\n this.insertRule(rule);\n if (this.isSyncFontLoadingSupported) {\n return;\n }\n await new Promise(resolve => {\n const request = this._queueLoadingCallback(resolve);\n this._prepareFontLoadEvent(font, request);\n });\n }\n }\n get isFontLoadingAPISupported() {\n const hasFonts = !!this._document?.fonts;\n return shadow(this, \"isFontLoadingAPISupported\", hasFonts);\n }\n get isSyncFontLoadingSupported() {\n let supported = false;\n if (isNodeJS) {\n supported = true;\n } else if (typeof navigator !== \"undefined\" && typeof navigator?.userAgent === \"string\" && /Mozilla\\/5.0.*?rv:\\d+.*? Gecko/.test(navigator.userAgent)) {\n supported = true;\n }\n return shadow(this, \"isSyncFontLoadingSupported\", supported);\n }\n _queueLoadingCallback(callback) {\n function completeRequest() {\n assert(!request.done, \"completeRequest() cannot be called twice.\");\n request.done = true;\n while (loadingRequests.length > 0 && loadingRequests[0].done) {\n const otherRequest = loadingRequests.shift();\n setTimeout(otherRequest.callback, 0);\n }\n }\n const {\n loadingRequests\n } = this;\n const request = {\n done: false,\n complete: completeRequest,\n callback\n };\n loadingRequests.push(request);\n return request;\n }\n get _loadTestFont() {\n const testFont = atob(\"T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQA\" + \"FQAABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAA\" + \"ALwAAAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgA\" + \"AAAGbmFtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1\" + \"AAsD6AAAAADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD\" + \"6AAAAAAD6AABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACM\" + \"AooCvAAAAeAAMQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4D\" + \"IP84AFoDIQAAAAAAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAA\" + \"AAEAAQAAAAEAAAAAAAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUA\" + \"AQAAAAEAAAAAAAYAAQAAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgAB\" + \"AAMAAQQJAAMAAgABAAMAAQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABY\" + \"AAAAAAAAAwAAAAMAAAAcAAEAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAA\" + \"AC7////TAAEAAAAAAAABBgAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" + \"AAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" + \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" + \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" + \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" + \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAAAAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAA\" + \"AAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgcA/gXBIwMAYuL+nz5tQXkD5j3CBLnEQAC\" + \"AQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYAAABAQAADwACAQEEE/t3\" + \"Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQAAAAAAAABAAAAAMmJbzEAAAAAzgTj\" + \"FQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAgABAAAAAAAAAAAD6AAAAAAAAA==\");\n return shadow(this, \"_loadTestFont\", testFont);\n }\n _prepareFontLoadEvent(font, request) {\n function int32(data, offset) {\n return data.charCodeAt(offset) << 24 | data.charCodeAt(offset + 1) << 16 | data.charCodeAt(offset + 2) << 8 | data.charCodeAt(offset + 3) & 0xff;\n }\n function spliceString(s, offset, remove, insert) {\n const chunk1 = s.substring(0, offset);\n const chunk2 = s.substring(offset + remove);\n return chunk1 + insert + chunk2;\n }\n let i, ii;\n const canvas = this._document.createElement(\"canvas\");\n canvas.width = 1;\n canvas.height = 1;\n const ctx = canvas.getContext(\"2d\");\n let called = 0;\n function isFontReady(name, callback) {\n if (++called > 30) {\n warn(\"Load test font never loaded.\");\n callback();\n return;\n }\n ctx.font = \"30px \" + name;\n ctx.fillText(\".\", 0, 20);\n const imageData = ctx.getImageData(0, 0, 1, 1);\n if (imageData.data[3] > 0) {\n callback();\n return;\n }\n setTimeout(isFontReady.bind(null, name, callback));\n }\n const loadTestFontId = `lt${Date.now()}${this.loadTestFontId++}`;\n let data = this._loadTestFont;\n const COMMENT_OFFSET = 976;\n data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, loadTestFontId);\n const CFF_CHECKSUM_OFFSET = 16;\n const XXXX_VALUE = 0x58585858;\n let checksum = int32(data, CFF_CHECKSUM_OFFSET);\n for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {\n checksum = checksum - XXXX_VALUE + int32(loadTestFontId, i) | 0;\n }\n if (i < loadTestFontId.length) {\n checksum = checksum - XXXX_VALUE + int32(loadTestFontId + \"XXX\", i) | 0;\n }\n data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));\n const url = `url(data:font/opentype;base64,${btoa(data)});`;\n const rule = `@font-face {font-family:\"${loadTestFontId}\";src:${url}}`;\n this.insertRule(rule);\n const div = this._document.createElement(\"div\");\n div.style.visibility = \"hidden\";\n div.style.width = div.style.height = \"10px\";\n div.style.position = \"absolute\";\n div.style.top = div.style.left = \"0px\";\n for (const name of [font.loadedName, loadTestFontId]) {\n const span = this._document.createElement(\"span\");\n span.textContent = \"Hi\";\n span.style.fontFamily = name;\n div.append(span);\n }\n this._document.body.append(div);\n isFontReady(loadTestFontId, () => {\n div.remove();\n request.complete();\n });\n }\n}\nclass FontFaceObject {\n constructor(translatedData, {\n disableFontFace = false,\n fontExtraProperties = false,\n inspectFont = null\n }) {\n this.compiledGlyphs = Object.create(null);\n for (const i in translatedData) {\n this[i] = translatedData[i];\n }\n this.disableFontFace = disableFontFace === true;\n this.fontExtraProperties = fontExtraProperties === true;\n this._inspectFont = inspectFont;\n }\n createNativeFontFace() {\n if (!this.data || this.disableFontFace) {\n return null;\n }\n let nativeFontFace;\n if (!this.cssFontInfo) {\n nativeFontFace = new FontFace(this.loadedName, this.data, {});\n } else {\n const css = {\n weight: this.cssFontInfo.fontWeight\n };\n if (this.cssFontInfo.italicAngle) {\n css.style = `oblique ${this.cssFontInfo.italicAngle}deg`;\n }\n nativeFontFace = new FontFace(this.cssFontInfo.fontFamily, this.data, css);\n }\n this._inspectFont?.(this);\n return nativeFontFace;\n }\n createFontFaceRule() {\n if (!this.data || this.disableFontFace) {\n return null;\n }\n const url = `url(data:${this.mimetype};base64,${toBase64Util(this.data)});`;\n let rule;\n if (!this.cssFontInfo) {\n rule = `@font-face {font-family:\"${this.loadedName}\";src:${url}}`;\n } else {\n let css = `font-weight: ${this.cssFontInfo.fontWeight};`;\n if (this.cssFontInfo.italicAngle) {\n css += `font-style: oblique ${this.cssFontInfo.italicAngle}deg;`;\n }\n rule = `@font-face {font-family:\"${this.cssFontInfo.fontFamily}\";${css}src:${url}}`;\n }\n this._inspectFont?.(this, url);\n return rule;\n }\n getPathGenerator(objs, character) {\n if (this.compiledGlyphs[character] !== undefined) {\n return this.compiledGlyphs[character];\n }\n const objId = this.loadedName + \"_path_\" + character;\n let cmds;\n try {\n cmds = objs.get(objId);\n } catch (ex) {\n warn(`getPathGenerator - ignoring character: \"${ex}\".`);\n }\n const path = new Path2D(cmds || \"\");\n if (!this.fontExtraProperties) {\n objs.delete(objId);\n }\n return this.compiledGlyphs[character] = path;\n }\n}\n\n;// ./src/shared/message_handler.js\n\nconst CallbackKind = {\n DATA: 1,\n ERROR: 2\n};\nconst StreamKind = {\n CANCEL: 1,\n CANCEL_COMPLETE: 2,\n CLOSE: 3,\n ENQUEUE: 4,\n ERROR: 5,\n PULL: 6,\n PULL_COMPLETE: 7,\n START_COMPLETE: 8\n};\nfunction onFn() {}\nfunction wrapReason(ex) {\n if (ex instanceof AbortException || ex instanceof InvalidPDFException || ex instanceof MissingPDFException || ex instanceof PasswordException || ex instanceof UnexpectedResponseException || ex instanceof UnknownErrorException) {\n return ex;\n }\n if (!(ex instanceof Error || typeof ex === \"object\" && ex !== null)) {\n unreachable('wrapReason: Expected \"reason\" to be a (possibly cloned) Error.');\n }\n switch (ex.name) {\n case \"AbortException\":\n return new AbortException(ex.message);\n case \"InvalidPDFException\":\n return new InvalidPDFException(ex.message);\n case \"MissingPDFException\":\n return new MissingPDFException(ex.message);\n case \"PasswordException\":\n return new PasswordException(ex.message, ex.code);\n case \"UnexpectedResponseException\":\n return new UnexpectedResponseException(ex.message, ex.status);\n case \"UnknownErrorException\":\n return new UnknownErrorException(ex.message, ex.details);\n }\n return new UnknownErrorException(ex.message, ex.toString());\n}\nclass MessageHandler {\n #messageAC = new AbortController();\n constructor(sourceName, targetName, comObj) {\n this.sourceName = sourceName;\n this.targetName = targetName;\n this.comObj = comObj;\n this.callbackId = 1;\n this.streamId = 1;\n this.streamSinks = Object.create(null);\n this.streamControllers = Object.create(null);\n this.callbackCapabilities = Object.create(null);\n this.actionHandler = Object.create(null);\n comObj.addEventListener(\"message\", this.#onMessage.bind(this), {\n signal: this.#messageAC.signal\n });\n }\n #onMessage({\n data\n }) {\n if (data.targetName !== this.sourceName) {\n return;\n }\n if (data.stream) {\n this.#processStreamMessage(data);\n return;\n }\n if (data.callback) {\n const callbackId = data.callbackId;\n const capability = this.callbackCapabilities[callbackId];\n if (!capability) {\n throw new Error(`Cannot resolve callback ${callbackId}`);\n }\n delete this.callbackCapabilities[callbackId];\n if (data.callback === CallbackKind.DATA) {\n capability.resolve(data.data);\n } else if (data.callback === CallbackKind.ERROR) {\n capability.reject(wrapReason(data.reason));\n } else {\n throw new Error(\"Unexpected callback case\");\n }\n return;\n }\n const action = this.actionHandler[data.action];\n if (!action) {\n throw new Error(`Unknown action from worker: ${data.action}`);\n }\n if (data.callbackId) {\n const sourceName = this.sourceName,\n targetName = data.sourceName,\n comObj = this.comObj;\n Promise.try(action, data.data).then(function (result) {\n comObj.postMessage({\n sourceName,\n targetName,\n callback: CallbackKind.DATA,\n callbackId: data.callbackId,\n data: result\n });\n }, function (reason) {\n comObj.postMessage({\n sourceName,\n targetName,\n callback: CallbackKind.ERROR,\n callbackId: data.callbackId,\n reason: wrapReason(reason)\n });\n });\n return;\n }\n if (data.streamId) {\n this.#createStreamSink(data);\n return;\n }\n action(data.data);\n }\n on(actionName, handler) {\n const ah = this.actionHandler;\n if (ah[actionName]) {\n throw new Error(`There is already an actionName called \"${actionName}\"`);\n }\n ah[actionName] = handler;\n }\n send(actionName, data, transfers) {\n this.comObj.postMessage({\n sourceName: this.sourceName,\n targetName: this.targetName,\n action: actionName,\n data\n }, transfers);\n }\n sendWithPromise(actionName, data, transfers) {\n const callbackId = this.callbackId++;\n const capability = Promise.withResolvers();\n this.callbackCapabilities[callbackId] = capability;\n try {\n this.comObj.postMessage({\n sourceName: this.sourceName,\n targetName: this.targetName,\n action: actionName,\n callbackId,\n data\n }, transfers);\n } catch (ex) {\n capability.reject(ex);\n }\n return capability.promise;\n }\n sendWithStream(actionName, data, queueingStrategy, transfers) {\n const streamId = this.streamId++,\n sourceName = this.sourceName,\n targetName = this.targetName,\n comObj = this.comObj;\n return new ReadableStream({\n start: controller => {\n const startCapability = Promise.withResolvers();\n this.streamControllers[streamId] = {\n controller,\n startCall: startCapability,\n pullCall: null,\n cancelCall: null,\n isClosed: false\n };\n comObj.postMessage({\n sourceName,\n targetName,\n action: actionName,\n streamId,\n data,\n desiredSize: controller.desiredSize\n }, transfers);\n return startCapability.promise;\n },\n pull: controller => {\n const pullCapability = Promise.withResolvers();\n this.streamControllers[streamId].pullCall = pullCapability;\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.PULL,\n streamId,\n desiredSize: controller.desiredSize\n });\n return pullCapability.promise;\n },\n cancel: reason => {\n assert(reason instanceof Error, \"cancel must have a valid reason\");\n const cancelCapability = Promise.withResolvers();\n this.streamControllers[streamId].cancelCall = cancelCapability;\n this.streamControllers[streamId].isClosed = true;\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.CANCEL,\n streamId,\n reason: wrapReason(reason)\n });\n return cancelCapability.promise;\n }\n }, queueingStrategy);\n }\n #createStreamSink(data) {\n const streamId = data.streamId,\n sourceName = this.sourceName,\n targetName = data.sourceName,\n comObj = this.comObj;\n const self = this,\n action = this.actionHandler[data.action];\n const streamSink = {\n enqueue(chunk, size = 1, transfers) {\n if (this.isCancelled) {\n return;\n }\n const lastDesiredSize = this.desiredSize;\n this.desiredSize -= size;\n if (lastDesiredSize > 0 && this.desiredSize <= 0) {\n this.sinkCapability = Promise.withResolvers();\n this.ready = this.sinkCapability.promise;\n }\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.ENQUEUE,\n streamId,\n chunk\n }, transfers);\n },\n close() {\n if (this.isCancelled) {\n return;\n }\n this.isCancelled = true;\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.CLOSE,\n streamId\n });\n delete self.streamSinks[streamId];\n },\n error(reason) {\n assert(reason instanceof Error, \"error must have a valid reason\");\n if (this.isCancelled) {\n return;\n }\n this.isCancelled = true;\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.ERROR,\n streamId,\n reason: wrapReason(reason)\n });\n },\n sinkCapability: Promise.withResolvers(),\n onPull: null,\n onCancel: null,\n isCancelled: false,\n desiredSize: data.desiredSize,\n ready: null\n };\n streamSink.sinkCapability.resolve();\n streamSink.ready = streamSink.sinkCapability.promise;\n this.streamSinks[streamId] = streamSink;\n Promise.try(action, data.data, streamSink).then(function () {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.START_COMPLETE,\n streamId,\n success: true\n });\n }, function (reason) {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.START_COMPLETE,\n streamId,\n reason: wrapReason(reason)\n });\n });\n }\n #processStreamMessage(data) {\n const streamId = data.streamId,\n sourceName = this.sourceName,\n targetName = data.sourceName,\n comObj = this.comObj;\n const streamController = this.streamControllers[streamId],\n streamSink = this.streamSinks[streamId];\n switch (data.stream) {\n case StreamKind.START_COMPLETE:\n if (data.success) {\n streamController.startCall.resolve();\n } else {\n streamController.startCall.reject(wrapReason(data.reason));\n }\n break;\n case StreamKind.PULL_COMPLETE:\n if (data.success) {\n streamController.pullCall.resolve();\n } else {\n streamController.pullCall.reject(wrapReason(data.reason));\n }\n break;\n case StreamKind.PULL:\n if (!streamSink) {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.PULL_COMPLETE,\n streamId,\n success: true\n });\n break;\n }\n if (streamSink.desiredSize <= 0 && data.desiredSize > 0) {\n streamSink.sinkCapability.resolve();\n }\n streamSink.desiredSize = data.desiredSize;\n Promise.try(streamSink.onPull || onFn).then(function () {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.PULL_COMPLETE,\n streamId,\n success: true\n });\n }, function (reason) {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.PULL_COMPLETE,\n streamId,\n reason: wrapReason(reason)\n });\n });\n break;\n case StreamKind.ENQUEUE:\n assert(streamController, \"enqueue should have stream controller\");\n if (streamController.isClosed) {\n break;\n }\n streamController.controller.enqueue(data.chunk);\n break;\n case StreamKind.CLOSE:\n assert(streamController, \"close should have stream controller\");\n if (streamController.isClosed) {\n break;\n }\n streamController.isClosed = true;\n streamController.controller.close();\n this.#deleteStreamController(streamController, streamId);\n break;\n case StreamKind.ERROR:\n assert(streamController, \"error should have stream controller\");\n streamController.controller.error(wrapReason(data.reason));\n this.#deleteStreamController(streamController, streamId);\n break;\n case StreamKind.CANCEL_COMPLETE:\n if (data.success) {\n streamController.cancelCall.resolve();\n } else {\n streamController.cancelCall.reject(wrapReason(data.reason));\n }\n this.#deleteStreamController(streamController, streamId);\n break;\n case StreamKind.CANCEL:\n if (!streamSink) {\n break;\n }\n const dataReason = wrapReason(data.reason);\n Promise.try(streamSink.onCancel || onFn, dataReason).then(function () {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.CANCEL_COMPLETE,\n streamId,\n success: true\n });\n }, function (reason) {\n comObj.postMessage({\n sourceName,\n targetName,\n stream: StreamKind.CANCEL_COMPLETE,\n streamId,\n reason: wrapReason(reason)\n });\n });\n streamSink.sinkCapability.reject(dataReason);\n streamSink.isCancelled = true;\n delete this.streamSinks[streamId];\n break;\n default:\n throw new Error(\"Unexpected stream case\");\n }\n }\n async #deleteStreamController(streamController, streamId) {\n await Promise.allSettled([streamController.startCall?.promise, streamController.pullCall?.promise, streamController.cancelCall?.promise]);\n delete this.streamControllers[streamId];\n }\n destroy() {\n this.#messageAC?.abort();\n this.#messageAC = null;\n }\n}\n\n;// ./src/display/canvas_factory.js\n\nclass BaseCanvasFactory {\n #enableHWA = false;\n constructor({\n enableHWA = false\n }) {\n this.#enableHWA = enableHWA;\n }\n create(width, height) {\n if (width <= 0 || height <= 0) {\n throw new Error(\"Invalid canvas size\");\n }\n const canvas = this._createCanvas(width, height);\n return {\n canvas,\n context: canvas.getContext(\"2d\", {\n willReadFrequently: !this.#enableHWA\n })\n };\n }\n reset(canvasAndContext, width, height) {\n if (!canvasAndContext.canvas) {\n throw new Error(\"Canvas is not specified\");\n }\n if (width <= 0 || height <= 0) {\n throw new Error(\"Invalid canvas size\");\n }\n canvasAndContext.canvas.width = width;\n canvasAndContext.canvas.height = height;\n }\n destroy(canvasAndContext) {\n if (!canvasAndContext.canvas) {\n throw new Error(\"Canvas is not specified\");\n }\n canvasAndContext.canvas.width = 0;\n canvasAndContext.canvas.height = 0;\n canvasAndContext.canvas = null;\n canvasAndContext.context = null;\n }\n _createCanvas(width, height) {\n unreachable(\"Abstract method `_createCanvas` called.\");\n }\n}\nclass DOMCanvasFactory extends BaseCanvasFactory {\n constructor({\n ownerDocument = globalThis.document,\n enableHWA = false\n }) {\n super({\n enableHWA\n });\n this._document = ownerDocument;\n }\n _createCanvas(width, height) {\n const canvas = this._document.createElement(\"canvas\");\n canvas.width = width;\n canvas.height = height;\n return canvas;\n }\n}\n\n;// ./src/display/cmap_reader_factory.js\n\n\nclass BaseCMapReaderFactory {\n constructor({\n baseUrl = null,\n isCompressed = true\n }) {\n this.baseUrl = baseUrl;\n this.isCompressed = isCompressed;\n }\n async fetch({\n name\n }) {\n if (!this.baseUrl) {\n throw new Error(\"Ensure that the `cMapUrl` and `cMapPacked` API parameters are provided.\");\n }\n if (!name) {\n throw new Error(\"CMap name must be specified.\");\n }\n const url = this.baseUrl + name + (this.isCompressed ? \".bcmap\" : \"\");\n return this._fetch(url).then(cMapData => ({\n cMapData,\n isCompressed: this.isCompressed\n })).catch(reason => {\n throw new Error(`Unable to load ${this.isCompressed ? \"binary \" : \"\"}CMap at: ${url}`);\n });\n }\n async _fetch(url) {\n unreachable(\"Abstract method `_fetch` called.\");\n }\n}\nclass DOMCMapReaderFactory extends BaseCMapReaderFactory {\n async _fetch(url) {\n const data = await fetchData(url, this.isCompressed ? \"arraybuffer\" : \"text\");\n return data instanceof ArrayBuffer ? new Uint8Array(data) : stringToBytes(data);\n }\n}\n\n;// ./src/display/filter_factory.js\n\n\nclass BaseFilterFactory {\n addFilter(maps) {\n return \"none\";\n }\n addHCMFilter(fgColor, bgColor) {\n return \"none\";\n }\n addAlphaFilter(map) {\n return \"none\";\n }\n addLuminosityFilter(map) {\n return \"none\";\n }\n addHighlightHCMFilter(filterName, fgColor, bgColor, newFgColor, newBgColor) {\n return \"none\";\n }\n destroy(keepHCM = false) {}\n}\nclass DOMFilterFactory extends BaseFilterFactory {\n #baseUrl;\n #_cache;\n #_defs;\n #docId;\n #document;\n #_hcmCache;\n #id = 0;\n constructor({\n docId,\n ownerDocument = globalThis.document\n }) {\n super();\n this.#docId = docId;\n this.#document = ownerDocument;\n }\n get #cache() {\n return this.#_cache ||= new Map();\n }\n get #hcmCache() {\n return this.#_hcmCache ||= new Map();\n }\n get #defs() {\n if (!this.#_defs) {\n const div = this.#document.createElement(\"div\");\n const {\n style\n } = div;\n style.visibility = \"hidden\";\n style.contain = \"strict\";\n style.width = style.height = 0;\n style.position = \"absolute\";\n style.top = style.left = 0;\n style.zIndex = -1;\n const svg = this.#document.createElementNS(SVG_NS, \"svg\");\n svg.setAttribute(\"width\", 0);\n svg.setAttribute(\"height\", 0);\n this.#_defs = this.#document.createElementNS(SVG_NS, \"defs\");\n div.append(svg);\n svg.append(this.#_defs);\n this.#document.body.append(div);\n }\n return this.#_defs;\n }\n #createTables(maps) {\n if (maps.length === 1) {\n const mapR = maps[0];\n const buffer = new Array(256);\n for (let i = 0; i < 256; i++) {\n buffer[i] = mapR[i] / 255;\n }\n const table = buffer.join(\",\");\n return [table, table, table];\n }\n const [mapR, mapG, mapB] = maps;\n const bufferR = new Array(256);\n const bufferG = new Array(256);\n const bufferB = new Array(256);\n for (let i = 0; i < 256; i++) {\n bufferR[i] = mapR[i] / 255;\n bufferG[i] = mapG[i] / 255;\n bufferB[i] = mapB[i] / 255;\n }\n return [bufferR.join(\",\"), bufferG.join(\",\"), bufferB.join(\",\")];\n }\n #createUrl(id) {\n if (this.#baseUrl === undefined) {\n this.#baseUrl = \"\";\n const url = this.#document.URL;\n if (url !== this.#document.baseURI) {\n if (isDataScheme(url)) {\n warn('#createUrl: ignore \"data:\"-URL for performance reasons.');\n } else {\n this.#baseUrl = url.split(\"#\", 1)[0];\n }\n }\n }\n return `url(${this.#baseUrl}#${id})`;\n }\n addFilter(maps) {\n if (!maps) {\n return \"none\";\n }\n let value = this.#cache.get(maps);\n if (value) {\n return value;\n }\n const [tableR, tableG, tableB] = this.#createTables(maps);\n const key = maps.length === 1 ? tableR : `${tableR}${tableG}${tableB}`;\n value = this.#cache.get(key);\n if (value) {\n this.#cache.set(maps, value);\n return value;\n }\n const id = `g_${this.#docId}_transfer_map_${this.#id++}`;\n const url = this.#createUrl(id);\n this.#cache.set(maps, url);\n this.#cache.set(key, url);\n const filter = this.#createFilter(id);\n this.#addTransferMapConversion(tableR, tableG, tableB, filter);\n return url;\n }\n addHCMFilter(fgColor, bgColor) {\n const key = `${fgColor}-${bgColor}`;\n const filterName = \"base\";\n let info = this.#hcmCache.get(filterName);\n if (info?.key === key) {\n return info.url;\n }\n if (info) {\n info.filter?.remove();\n info.key = key;\n info.url = \"none\";\n info.filter = null;\n } else {\n info = {\n key,\n url: \"none\",\n filter: null\n };\n this.#hcmCache.set(filterName, info);\n }\n if (!fgColor || !bgColor) {\n return info.url;\n }\n const fgRGB = this.#getRGB(fgColor);\n fgColor = Util.makeHexColor(...fgRGB);\n const bgRGB = this.#getRGB(bgColor);\n bgColor = Util.makeHexColor(...bgRGB);\n this.#defs.style.color = \"\";\n if (fgColor === \"#000000\" && bgColor === \"#ffffff\" || fgColor === bgColor) {\n return info.url;\n }\n const map = new Array(256);\n for (let i = 0; i <= 255; i++) {\n const x = i / 255;\n map[i] = x <= 0.03928 ? x / 12.92 : ((x + 0.055) / 1.055) ** 2.4;\n }\n const table = map.join(\",\");\n const id = `g_${this.#docId}_hcm_filter`;\n const filter = info.filter = this.#createFilter(id);\n this.#addTransferMapConversion(table, table, table, filter);\n this.#addGrayConversion(filter);\n const getSteps = (c, n) => {\n const start = fgRGB[c] / 255;\n const end = bgRGB[c] / 255;\n const arr = new Array(n + 1);\n for (let i = 0; i <= n; i++) {\n arr[i] = start + i / n * (end - start);\n }\n return arr.join(\",\");\n };\n this.#addTransferMapConversion(getSteps(0, 5), getSteps(1, 5), getSteps(2, 5), filter);\n info.url = this.#createUrl(id);\n return info.url;\n }\n addAlphaFilter(map) {\n let value = this.#cache.get(map);\n if (value) {\n return value;\n }\n const [tableA] = this.#createTables([map]);\n const key = `alpha_${tableA}`;\n value = this.#cache.get(key);\n if (value) {\n this.#cache.set(map, value);\n return value;\n }\n const id = `g_${this.#docId}_alpha_map_${this.#id++}`;\n const url = this.#createUrl(id);\n this.#cache.set(map, url);\n this.#cache.set(key, url);\n const filter = this.#createFilter(id);\n this.#addTransferMapAlphaConversion(tableA, filter);\n return url;\n }\n addLuminosityFilter(map) {\n let value = this.#cache.get(map || \"luminosity\");\n if (value) {\n return value;\n }\n let tableA, key;\n if (map) {\n [tableA] = this.#createTables([map]);\n key = `luminosity_${tableA}`;\n } else {\n key = \"luminosity\";\n }\n value = this.#cache.get(key);\n if (value) {\n this.#cache.set(map, value);\n return value;\n }\n const id = `g_${this.#docId}_luminosity_map_${this.#id++}`;\n const url = this.#createUrl(id);\n this.#cache.set(map, url);\n this.#cache.set(key, url);\n const filter = this.#createFilter(id);\n this.#addLuminosityConversion(filter);\n if (map) {\n this.#addTransferMapAlphaConversion(tableA, filter);\n }\n return url;\n }\n addHighlightHCMFilter(filterName, fgColor, bgColor, newFgColor, newBgColor) {\n const key = `${fgColor}-${bgColor}-${newFgColor}-${newBgColor}`;\n let info = this.#hcmCache.get(filterName);\n if (info?.key === key) {\n return info.url;\n }\n if (info) {\n info.filter?.remove();\n info.key = key;\n info.url = \"none\";\n info.filter = null;\n } else {\n info = {\n key,\n url: \"none\",\n filter: null\n };\n this.#hcmCache.set(filterName, info);\n }\n if (!fgColor || !bgColor) {\n return info.url;\n }\n const [fgRGB, bgRGB] = [fgColor, bgColor].map(this.#getRGB.bind(this));\n let fgGray = Math.round(0.2126 * fgRGB[0] + 0.7152 * fgRGB[1] + 0.0722 * fgRGB[2]);\n let bgGray = Math.round(0.2126 * bgRGB[0] + 0.7152 * bgRGB[1] + 0.0722 * bgRGB[2]);\n let [newFgRGB, newBgRGB] = [newFgColor, newBgColor].map(this.#getRGB.bind(this));\n if (bgGray < fgGray) {\n [fgGray, bgGray, newFgRGB, newBgRGB] = [bgGray, fgGray, newBgRGB, newFgRGB];\n }\n this.#defs.style.color = \"\";\n const getSteps = (fg, bg, n) => {\n const arr = new Array(256);\n const step = (bgGray - fgGray) / n;\n const newStart = fg / 255;\n const newStep = (bg - fg) / (255 * n);\n let prev = 0;\n for (let i = 0; i <= n; i++) {\n const k = Math.round(fgGray + i * step);\n const value = newStart + i * newStep;\n for (let j = prev; j <= k; j++) {\n arr[j] = value;\n }\n prev = k + 1;\n }\n for (let i = prev; i < 256; i++) {\n arr[i] = arr[prev - 1];\n }\n return arr.join(\",\");\n };\n const id = `g_${this.#docId}_hcm_${filterName}_filter`;\n const filter = info.filter = this.#createFilter(id);\n this.#addGrayConversion(filter);\n this.#addTransferMapConversion(getSteps(newFgRGB[0], newBgRGB[0], 5), getSteps(newFgRGB[1], newBgRGB[1], 5), getSteps(newFgRGB[2], newBgRGB[2], 5), filter);\n info.url = this.#createUrl(id);\n return info.url;\n }\n destroy(keepHCM = false) {\n if (keepHCM && this.#_hcmCache?.size) {\n return;\n }\n this.#_defs?.parentNode.parentNode.remove();\n this.#_defs = null;\n this.#_cache?.clear();\n this.#_cache = null;\n this.#_hcmCache?.clear();\n this.#_hcmCache = null;\n this.#id = 0;\n }\n #addLuminosityConversion(filter) {\n const feColorMatrix = this.#document.createElementNS(SVG_NS, \"feColorMatrix\");\n feColorMatrix.setAttribute(\"type\", \"matrix\");\n feColorMatrix.setAttribute(\"values\", \"0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3 0.59 0.11 0 0\");\n filter.append(feColorMatrix);\n }\n #addGrayConversion(filter) {\n const feColorMatrix = this.#document.createElementNS(SVG_NS, \"feColorMatrix\");\n feColorMatrix.setAttribute(\"type\", \"matrix\");\n feColorMatrix.setAttribute(\"values\", \"0.2126 0.7152 0.0722 0 0 0.2126 0.7152 0.0722 0 0 0.2126 0.7152 0.0722 0 0 0 0 0 1 0\");\n filter.append(feColorMatrix);\n }\n #createFilter(id) {\n const filter = this.#document.createElementNS(SVG_NS, \"filter\");\n filter.setAttribute(\"color-interpolation-filters\", \"sRGB\");\n filter.setAttribute(\"id\", id);\n this.#defs.append(filter);\n return filter;\n }\n #appendFeFunc(feComponentTransfer, func, table) {\n const feFunc = this.#document.createElementNS(SVG_NS, func);\n feFunc.setAttribute(\"type\", \"discrete\");\n feFunc.setAttribute(\"tableValues\", table);\n feComponentTransfer.append(feFunc);\n }\n #addTransferMapConversion(rTable, gTable, bTable, filter) {\n const feComponentTransfer = this.#document.createElementNS(SVG_NS, \"feComponentTransfer\");\n filter.append(feComponentTransfer);\n this.#appendFeFunc(feComponentTransfer, \"feFuncR\", rTable);\n this.#appendFeFunc(feComponentTransfer, \"feFuncG\", gTable);\n this.#appendFeFunc(feComponentTransfer, \"feFuncB\", bTable);\n }\n #addTransferMapAlphaConversion(aTable, filter) {\n const feComponentTransfer = this.#document.createElementNS(SVG_NS, \"feComponentTransfer\");\n filter.append(feComponentTransfer);\n this.#appendFeFunc(feComponentTransfer, \"feFuncA\", aTable);\n }\n #getRGB(color) {\n this.#defs.style.color = color;\n return getRGB(getComputedStyle(this.#defs).getPropertyValue(\"color\"));\n }\n}\n\n;// ./src/display/standard_fontdata_factory.js\n\n\nclass BaseStandardFontDataFactory {\n constructor({\n baseUrl = null\n }) {\n this.baseUrl = baseUrl;\n }\n async fetch({\n filename\n }) {\n if (!this.baseUrl) {\n throw new Error(\"Ensure that the `standardFontDataUrl` API parameter is provided.\");\n }\n if (!filename) {\n throw new Error(\"Font filename must be specified.\");\n }\n const url = `${this.baseUrl}${filename}`;\n return this._fetch(url).catch(reason => {\n throw new Error(`Unable to load font data at: ${url}`);\n });\n }\n async _fetch(url) {\n unreachable(\"Abstract method `_fetch` called.\");\n }\n}\nclass DOMStandardFontDataFactory extends BaseStandardFontDataFactory {\n async _fetch(url) {\n const data = await fetchData(url, \"arraybuffer\");\n return new Uint8Array(data);\n }\n}\n\n;// ./src/display/node_utils.js\n\n\n\n\n\nif (isNodeJS) {\n warn(\"Please use the `legacy` build in Node.js environments.\");\n}\nasync function node_utils_fetchData(url) {\n const fs = process.getBuiltinModule(\"fs\");\n const data = await fs.promises.readFile(url);\n return new Uint8Array(data);\n}\nclass NodeFilterFactory extends BaseFilterFactory {}\nclass NodeCanvasFactory extends BaseCanvasFactory {\n _createCanvas(width, height) {\n const require = process.getBuiltinModule(\"module\").createRequire(import.meta.url);\n const canvas = require(\"@napi-rs/canvas\");\n return canvas.createCanvas(width, height);\n }\n}\nclass NodeCMapReaderFactory extends BaseCMapReaderFactory {\n async _fetch(url) {\n return node_utils_fetchData(url);\n }\n}\nclass NodeStandardFontDataFactory extends BaseStandardFontDataFactory {\n async _fetch(url) {\n return node_utils_fetchData(url);\n }\n}\n\n;// ./src/display/pattern_helper.js\n\n\nconst PathType = {\n FILL: \"Fill\",\n STROKE: \"Stroke\",\n SHADING: \"Shading\"\n};\nfunction applyBoundingBox(ctx, bbox) {\n if (!bbox) {\n return;\n }\n const width = bbox[2] - bbox[0];\n const height = bbox[3] - bbox[1];\n const region = new Path2D();\n region.rect(bbox[0], bbox[1], width, height);\n ctx.clip(region);\n}\nclass BaseShadingPattern {\n getPattern() {\n unreachable(\"Abstract method `getPattern` called.\");\n }\n}\nclass RadialAxialShadingPattern extends BaseShadingPattern {\n constructor(IR) {\n super();\n this._type = IR[1];\n this._bbox = IR[2];\n this._colorStops = IR[3];\n this._p0 = IR[4];\n this._p1 = IR[5];\n this._r0 = IR[6];\n this._r1 = IR[7];\n this.matrix = null;\n }\n _createGradient(ctx) {\n let grad;\n if (this._type === \"axial\") {\n grad = ctx.createLinearGradient(this._p0[0], this._p0[1], this._p1[0], this._p1[1]);\n } else if (this._type === \"radial\") {\n grad = ctx.createRadialGradient(this._p0[0], this._p0[1], this._r0, this._p1[0], this._p1[1], this._r1);\n }\n for (const colorStop of this._colorStops) {\n grad.addColorStop(colorStop[0], colorStop[1]);\n }\n return grad;\n }\n getPattern(ctx, owner, inverse, pathType) {\n let pattern;\n if (pathType === PathType.STROKE || pathType === PathType.FILL) {\n const ownerBBox = owner.current.getClippedPathBoundingBox(pathType, getCurrentTransform(ctx)) || [0, 0, 0, 0];\n const width = Math.ceil(ownerBBox[2] - ownerBBox[0]) || 1;\n const height = Math.ceil(ownerBBox[3] - ownerBBox[1]) || 1;\n const tmpCanvas = owner.cachedCanvases.getCanvas(\"pattern\", width, height);\n const tmpCtx = tmpCanvas.context;\n tmpCtx.clearRect(0, 0, tmpCtx.canvas.width, tmpCtx.canvas.height);\n tmpCtx.beginPath();\n tmpCtx.rect(0, 0, tmpCtx.canvas.width, tmpCtx.canvas.height);\n tmpCtx.translate(-ownerBBox[0], -ownerBBox[1]);\n inverse = Util.transform(inverse, [1, 0, 0, 1, ownerBBox[0], ownerBBox[1]]);\n tmpCtx.transform(...owner.baseTransform);\n if (this.matrix) {\n tmpCtx.transform(...this.matrix);\n }\n applyBoundingBox(tmpCtx, this._bbox);\n tmpCtx.fillStyle = this._createGradient(tmpCtx);\n tmpCtx.fill();\n pattern = ctx.createPattern(tmpCanvas.canvas, \"no-repeat\");\n const domMatrix = new DOMMatrix(inverse);\n pattern.setTransform(domMatrix);\n } else {\n applyBoundingBox(ctx, this._bbox);\n pattern = this._createGradient(ctx);\n }\n return pattern;\n }\n}\nfunction drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {\n const coords = context.coords,\n colors = context.colors;\n const bytes = data.data,\n rowSize = data.width * 4;\n let tmp;\n if (coords[p1 + 1] > coords[p2 + 1]) {\n tmp = p1;\n p1 = p2;\n p2 = tmp;\n tmp = c1;\n c1 = c2;\n c2 = tmp;\n }\n if (coords[p2 + 1] > coords[p3 + 1]) {\n tmp = p2;\n p2 = p3;\n p3 = tmp;\n tmp = c2;\n c2 = c3;\n c3 = tmp;\n }\n if (coords[p1 + 1] > coords[p2 + 1]) {\n tmp = p1;\n p1 = p2;\n p2 = tmp;\n tmp = c1;\n c1 = c2;\n c2 = tmp;\n }\n const x1 = (coords[p1] + context.offsetX) * context.scaleX;\n const y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;\n const x2 = (coords[p2] + context.offsetX) * context.scaleX;\n const y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;\n const x3 = (coords[p3] + context.offsetX) * context.scaleX;\n const y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;\n if (y1 >= y3) {\n return;\n }\n const c1r = colors[c1],\n c1g = colors[c1 + 1],\n c1b = colors[c1 + 2];\n const c2r = colors[c2],\n c2g = colors[c2 + 1],\n c2b = colors[c2 + 2];\n const c3r = colors[c3],\n c3g = colors[c3 + 1],\n c3b = colors[c3 + 2];\n const minY = Math.round(y1),\n maxY = Math.round(y3);\n let xa, car, cag, cab;\n let xb, cbr, cbg, cbb;\n for (let y = minY; y <= maxY; y++) {\n if (y < y2) {\n const k = y < y1 ? 0 : (y1 - y) / (y1 - y2);\n xa = x1 - (x1 - x2) * k;\n car = c1r - (c1r - c2r) * k;\n cag = c1g - (c1g - c2g) * k;\n cab = c1b - (c1b - c2b) * k;\n } else {\n let k;\n if (y > y3) {\n k = 1;\n } else if (y2 === y3) {\n k = 0;\n } else {\n k = (y2 - y) / (y2 - y3);\n }\n xa = x2 - (x2 - x3) * k;\n car = c2r - (c2r - c3r) * k;\n cag = c2g - (c2g - c3g) * k;\n cab = c2b - (c2b - c3b) * k;\n }\n let k;\n if (y < y1) {\n k = 0;\n } else if (y > y3) {\n k = 1;\n } else {\n k = (y1 - y) / (y1 - y3);\n }\n xb = x1 - (x1 - x3) * k;\n cbr = c1r - (c1r - c3r) * k;\n cbg = c1g - (c1g - c3g) * k;\n cbb = c1b - (c1b - c3b) * k;\n const x1_ = Math.round(Math.min(xa, xb));\n const x2_ = Math.round(Math.max(xa, xb));\n let j = rowSize * y + x1_ * 4;\n for (let x = x1_; x <= x2_; x++) {\n k = (xa - x) / (xa - xb);\n if (k < 0) {\n k = 0;\n } else if (k > 1) {\n k = 1;\n }\n bytes[j++] = car - (car - cbr) * k | 0;\n bytes[j++] = cag - (cag - cbg) * k | 0;\n bytes[j++] = cab - (cab - cbb) * k | 0;\n bytes[j++] = 255;\n }\n }\n}\nfunction drawFigure(data, figure, context) {\n const ps = figure.coords;\n const cs = figure.colors;\n let i, ii;\n switch (figure.type) {\n case \"lattice\":\n const verticesPerRow = figure.verticesPerRow;\n const rows = Math.floor(ps.length / verticesPerRow) - 1;\n const cols = verticesPerRow - 1;\n for (i = 0; i < rows; i++) {\n let q = i * verticesPerRow;\n for (let j = 0; j < cols; j++, q++) {\n drawTriangle(data, context, ps[q], ps[q + 1], ps[q + verticesPerRow], cs[q], cs[q + 1], cs[q + verticesPerRow]);\n drawTriangle(data, context, ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);\n }\n }\n break;\n case \"triangles\":\n for (i = 0, ii = ps.length; i < ii; i += 3) {\n drawTriangle(data, context, ps[i], ps[i + 1], ps[i + 2], cs[i], cs[i + 1], cs[i + 2]);\n }\n break;\n default:\n throw new Error(\"illegal figure\");\n }\n}\nclass MeshShadingPattern extends BaseShadingPattern {\n constructor(IR) {\n super();\n this._coords = IR[2];\n this._colors = IR[3];\n this._figures = IR[4];\n this._bounds = IR[5];\n this._bbox = IR[7];\n this._background = IR[8];\n this.matrix = null;\n }\n _createMeshCanvas(combinedScale, backgroundColor, cachedCanvases) {\n const EXPECTED_SCALE = 1.1;\n const MAX_PATTERN_SIZE = 3000;\n const BORDER_SIZE = 2;\n const offsetX = Math.floor(this._bounds[0]);\n const offsetY = Math.floor(this._bounds[1]);\n const boundsWidth = Math.ceil(this._bounds[2]) - offsetX;\n const boundsHeight = Math.ceil(this._bounds[3]) - offsetY;\n const width = Math.min(Math.ceil(Math.abs(boundsWidth * combinedScale[0] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);\n const height = Math.min(Math.ceil(Math.abs(boundsHeight * combinedScale[1] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);\n const scaleX = boundsWidth / width;\n const scaleY = boundsHeight / height;\n const context = {\n coords: this._coords,\n colors: this._colors,\n offsetX: -offsetX,\n offsetY: -offsetY,\n scaleX: 1 / scaleX,\n scaleY: 1 / scaleY\n };\n const paddedWidth = width + BORDER_SIZE * 2;\n const paddedHeight = height + BORDER_SIZE * 2;\n const tmpCanvas = cachedCanvases.getCanvas(\"mesh\", paddedWidth, paddedHeight);\n const tmpCtx = tmpCanvas.context;\n const data = tmpCtx.createImageData(width, height);\n if (backgroundColor) {\n const bytes = data.data;\n for (let i = 0, ii = bytes.length; i < ii; i += 4) {\n bytes[i] = backgroundColor[0];\n bytes[i + 1] = backgroundColor[1];\n bytes[i + 2] = backgroundColor[2];\n bytes[i + 3] = 255;\n }\n }\n for (const figure of this._figures) {\n drawFigure(data, figure, context);\n }\n tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);\n const canvas = tmpCanvas.canvas;\n return {\n canvas,\n offsetX: offsetX - BORDER_SIZE * scaleX,\n offsetY: offsetY - BORDER_SIZE * scaleY,\n scaleX,\n scaleY\n };\n }\n getPattern(ctx, owner, inverse, pathType) {\n applyBoundingBox(ctx, this._bbox);\n let scale;\n if (pathType === PathType.SHADING) {\n scale = Util.singularValueDecompose2dScale(getCurrentTransform(ctx));\n } else {\n scale = Util.singularValueDecompose2dScale(owner.baseTransform);\n if (this.matrix) {\n const matrixScale = Util.singularValueDecompose2dScale(this.matrix);\n scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];\n }\n }\n const temporaryPatternCanvas = this._createMeshCanvas(scale, pathType === PathType.SHADING ? null : this._background, owner.cachedCanvases);\n if (pathType !== PathType.SHADING) {\n ctx.setTransform(...owner.baseTransform);\n if (this.matrix) {\n ctx.transform(...this.matrix);\n }\n }\n ctx.translate(temporaryPatternCanvas.offsetX, temporaryPatternCanvas.offsetY);\n ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);\n return ctx.createPattern(temporaryPatternCanvas.canvas, \"no-repeat\");\n }\n}\nclass DummyShadingPattern extends BaseShadingPattern {\n getPattern() {\n return \"hotpink\";\n }\n}\nfunction getShadingPattern(IR) {\n switch (IR[0]) {\n case \"RadialAxial\":\n return new RadialAxialShadingPattern(IR);\n case \"Mesh\":\n return new MeshShadingPattern(IR);\n case \"Dummy\":\n return new DummyShadingPattern();\n }\n throw new Error(`Unknown IR type: ${IR[0]}`);\n}\nconst PaintType = {\n COLORED: 1,\n UNCOLORED: 2\n};\nclass TilingPattern {\n static MAX_PATTERN_SIZE = 3000;\n constructor(IR, color, ctx, canvasGraphicsFactory, baseTransform) {\n this.operatorList = IR[2];\n this.matrix = IR[3];\n this.bbox = IR[4];\n this.xstep = IR[5];\n this.ystep = IR[6];\n this.paintType = IR[7];\n this.tilingType = IR[8];\n this.color = color;\n this.ctx = ctx;\n this.canvasGraphicsFactory = canvasGraphicsFactory;\n this.baseTransform = baseTransform;\n }\n createPatternCanvas(owner) {\n const {\n bbox,\n operatorList,\n paintType,\n tilingType,\n color,\n canvasGraphicsFactory\n } = this;\n let {\n xstep,\n ystep\n } = this;\n xstep = Math.abs(xstep);\n ystep = Math.abs(ystep);\n info(\"TilingType: \" + tilingType);\n const x0 = bbox[0],\n y0 = bbox[1],\n x1 = bbox[2],\n y1 = bbox[3];\n const width = x1 - x0;\n const height = y1 - y0;\n const matrixScale = Util.singularValueDecompose2dScale(this.matrix);\n const curMatrixScale = Util.singularValueDecompose2dScale(this.baseTransform);\n const combinedScaleX = matrixScale[0] * curMatrixScale[0];\n const combinedScaleY = matrixScale[1] * curMatrixScale[1];\n let canvasWidth = width,\n canvasHeight = height,\n redrawHorizontally = false,\n redrawVertically = false;\n const xScaledStep = Math.ceil(xstep * combinedScaleX);\n const yScaledStep = Math.ceil(ystep * combinedScaleY);\n const xScaledWidth = Math.ceil(width * combinedScaleX);\n const yScaledHeight = Math.ceil(height * combinedScaleY);\n if (xScaledStep >= xScaledWidth) {\n canvasWidth = xstep;\n } else {\n redrawHorizontally = true;\n }\n if (yScaledStep >= yScaledHeight) {\n canvasHeight = ystep;\n } else {\n redrawVertically = true;\n }\n const dimx = this.getSizeAndScale(canvasWidth, this.ctx.canvas.width, combinedScaleX);\n const dimy = this.getSizeAndScale(canvasHeight, this.ctx.canvas.height, combinedScaleY);\n const tmpCanvas = owner.cachedCanvases.getCanvas(\"pattern\", dimx.size, dimy.size);\n const tmpCtx = tmpCanvas.context;\n const graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);\n graphics.groupLevel = owner.groupLevel;\n this.setFillAndStrokeStyleToContext(graphics, paintType, color);\n tmpCtx.translate(-dimx.scale * x0, -dimy.scale * y0);\n graphics.transform(dimx.scale, 0, 0, dimy.scale, 0, 0);\n tmpCtx.save();\n this.clipBbox(graphics, x0, y0, x1, y1);\n graphics.baseTransform = getCurrentTransform(graphics.ctx);\n graphics.executeOperatorList(operatorList);\n graphics.endDrawing();\n tmpCtx.restore();\n if (redrawHorizontally || redrawVertically) {\n const image = tmpCanvas.canvas;\n if (redrawHorizontally) {\n canvasWidth = xstep;\n }\n if (redrawVertically) {\n canvasHeight = ystep;\n }\n const dimx2 = this.getSizeAndScale(canvasWidth, this.ctx.canvas.width, combinedScaleX);\n const dimy2 = this.getSizeAndScale(canvasHeight, this.ctx.canvas.height, combinedScaleY);\n const xSize = dimx2.size;\n const ySize = dimy2.size;\n const tmpCanvas2 = owner.cachedCanvases.getCanvas(\"pattern-workaround\", xSize, ySize);\n const tmpCtx2 = tmpCanvas2.context;\n const ii = redrawHorizontally ? Math.floor(width / xstep) : 0;\n const jj = redrawVertically ? Math.floor(height / ystep) : 0;\n for (let i = 0; i <= ii; i++) {\n for (let j = 0; j <= jj; j++) {\n tmpCtx2.drawImage(image, xSize * i, ySize * j, xSize, ySize, 0, 0, xSize, ySize);\n }\n }\n return {\n canvas: tmpCanvas2.canvas,\n scaleX: dimx2.scale,\n scaleY: dimy2.scale,\n offsetX: x0,\n offsetY: y0\n };\n }\n return {\n canvas: tmpCanvas.canvas,\n scaleX: dimx.scale,\n scaleY: dimy.scale,\n offsetX: x0,\n offsetY: y0\n };\n }\n getSizeAndScale(step, realOutputSize, scale) {\n const maxSize = Math.max(TilingPattern.MAX_PATTERN_SIZE, realOutputSize);\n let size = Math.ceil(step * scale);\n if (size >= maxSize) {\n size = maxSize;\n } else {\n scale = size / step;\n }\n return {\n scale,\n size\n };\n }\n clipBbox(graphics, x0, y0, x1, y1) {\n const bboxWidth = x1 - x0;\n const bboxHeight = y1 - y0;\n graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);\n graphics.current.updateRectMinMax(getCurrentTransform(graphics.ctx), [x0, y0, x1, y1]);\n graphics.clip();\n graphics.endPath();\n }\n setFillAndStrokeStyleToContext(graphics, paintType, color) {\n const context = graphics.ctx,\n current = graphics.current;\n switch (paintType) {\n case PaintType.COLORED:\n const ctx = this.ctx;\n context.fillStyle = ctx.fillStyle;\n context.strokeStyle = ctx.strokeStyle;\n current.fillColor = ctx.fillStyle;\n current.strokeColor = ctx.strokeStyle;\n break;\n case PaintType.UNCOLORED:\n const cssColor = Util.makeHexColor(color[0], color[1], color[2]);\n context.fillStyle = cssColor;\n context.strokeStyle = cssColor;\n current.fillColor = cssColor;\n current.strokeColor = cssColor;\n break;\n default:\n throw new FormatError(`Unsupported paint type: ${paintType}`);\n }\n }\n getPattern(ctx, owner, inverse, pathType) {\n let matrix = inverse;\n if (pathType !== PathType.SHADING) {\n matrix = Util.transform(matrix, owner.baseTransform);\n if (this.matrix) {\n matrix = Util.transform(matrix, this.matrix);\n }\n }\n const temporaryPatternCanvas = this.createPatternCanvas(owner);\n let domMatrix = new DOMMatrix(matrix);\n domMatrix = domMatrix.translate(temporaryPatternCanvas.offsetX, temporaryPatternCanvas.offsetY);\n domMatrix = domMatrix.scale(1 / temporaryPatternCanvas.scaleX, 1 / temporaryPatternCanvas.scaleY);\n const pattern = ctx.createPattern(temporaryPatternCanvas.canvas, \"repeat\");\n pattern.setTransform(domMatrix);\n return pattern;\n }\n}\n\n;// ./src/shared/image_utils.js\n\nfunction convertToRGBA(params) {\n switch (params.kind) {\n case ImageKind.GRAYSCALE_1BPP:\n return convertBlackAndWhiteToRGBA(params);\n case ImageKind.RGB_24BPP:\n return convertRGBToRGBA(params);\n }\n return null;\n}\nfunction convertBlackAndWhiteToRGBA({\n src,\n srcPos = 0,\n dest,\n width,\n height,\n nonBlackColor = 0xffffffff,\n inverseDecode = false\n}) {\n const black = util_FeatureTest.isLittleEndian ? 0xff000000 : 0x000000ff;\n const [zeroMapping, oneMapping] = inverseDecode ? [nonBlackColor, black] : [black, nonBlackColor];\n const widthInSource = width >> 3;\n const widthRemainder = width & 7;\n const srcLength = src.length;\n dest = new Uint32Array(dest.buffer);\n let destPos = 0;\n for (let i = 0; i < height; i++) {\n for (const max = srcPos + widthInSource; srcPos < max; srcPos++) {\n const elem = srcPos < srcLength ? src[srcPos] : 255;\n dest[destPos++] = elem & 0b10000000 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b1000000 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b100000 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b10000 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b1000 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b100 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b10 ? oneMapping : zeroMapping;\n dest[destPos++] = elem & 0b1 ? oneMapping : zeroMapping;\n }\n if (widthRemainder === 0) {\n continue;\n }\n const elem = srcPos < srcLength ? src[srcPos++] : 255;\n for (let j = 0; j < widthRemainder; j++) {\n dest[destPos++] = elem & 1 << 7 - j ? oneMapping : zeroMapping;\n }\n }\n return {\n srcPos,\n destPos\n };\n}\nfunction convertRGBToRGBA({\n src,\n srcPos = 0,\n dest,\n destPos = 0,\n width,\n height\n}) {\n let i = 0;\n const len = width * height * 3;\n const len32 = len >> 2;\n const src32 = new Uint32Array(src.buffer, srcPos, len32);\n if (FeatureTest.isLittleEndian) {\n for (; i < len32 - 2; i += 3, destPos += 4) {\n const s1 = src32[i];\n const s2 = src32[i + 1];\n const s3 = src32[i + 2];\n dest[destPos] = s1 | 0xff000000;\n dest[destPos + 1] = s1 >>> 24 | s2 << 8 | 0xff000000;\n dest[destPos + 2] = s2 >>> 16 | s3 << 16 | 0xff000000;\n dest[destPos + 3] = s3 >>> 8 | 0xff000000;\n }\n for (let j = i * 4, jj = srcPos + len; j < jj; j += 3) {\n dest[destPos++] = src[j] | src[j + 1] << 8 | src[j + 2] << 16 | 0xff000000;\n }\n } else {\n for (; i < len32 - 2; i += 3, destPos += 4) {\n const s1 = src32[i];\n const s2 = src32[i + 1];\n const s3 = src32[i + 2];\n dest[destPos] = s1 | 0xff;\n dest[destPos + 1] = s1 << 24 | s2 >>> 8 | 0xff;\n dest[destPos + 2] = s2 << 16 | s3 >>> 16 | 0xff;\n dest[destPos + 3] = s3 << 8 | 0xff;\n }\n for (let j = i * 4, jj = srcPos + len; j < jj; j += 3) {\n dest[destPos++] = src[j] << 24 | src[j + 1] << 16 | src[j + 2] << 8 | 0xff;\n }\n }\n return {\n srcPos: srcPos + len,\n destPos\n };\n}\nfunction grayToRGBA(src, dest) {\n if (FeatureTest.isLittleEndian) {\n for (let i = 0, ii = src.length; i < ii; i++) {\n dest[i] = src[i] * 0x10101 | 0xff000000;\n }\n } else {\n for (let i = 0, ii = src.length; i < ii; i++) {\n dest[i] = src[i] * 0x1010100 | 0x000000ff;\n }\n }\n}\n\n;// ./src/display/canvas.js\n\n\n\n\nconst MIN_FONT_SIZE = 16;\nconst MAX_FONT_SIZE = 100;\nconst EXECUTION_TIME = 15;\nconst EXECUTION_STEPS = 10;\nconst MAX_SIZE_TO_COMPILE = 1000;\nconst FULL_CHUNK_HEIGHT = 16;\nfunction mirrorContextOperations(ctx, destCtx) {\n if (ctx._removeMirroring) {\n throw new Error(\"Context is already forwarding operations.\");\n }\n ctx.__originalSave = ctx.save;\n ctx.__originalRestore = ctx.restore;\n ctx.__originalRotate = ctx.rotate;\n ctx.__originalScale = ctx.scale;\n ctx.__originalTranslate = ctx.translate;\n ctx.__originalTransform = ctx.transform;\n ctx.__originalSetTransform = ctx.setTransform;\n ctx.__originalResetTransform = ctx.resetTransform;\n ctx.__originalClip = ctx.clip;\n ctx.__originalMoveTo = ctx.moveTo;\n ctx.__originalLineTo = ctx.lineTo;\n ctx.__originalBezierCurveTo = ctx.bezierCurveTo;\n ctx.__originalRect = ctx.rect;\n ctx.__originalClosePath = ctx.closePath;\n ctx.__originalBeginPath = ctx.beginPath;\n ctx._removeMirroring = () => {\n ctx.save = ctx.__originalSave;\n ctx.restore = ctx.__originalRestore;\n ctx.rotate = ctx.__originalRotate;\n ctx.scale = ctx.__originalScale;\n ctx.translate = ctx.__originalTranslate;\n ctx.transform = ctx.__originalTransform;\n ctx.setTransform = ctx.__originalSetTransform;\n ctx.resetTransform = ctx.__originalResetTransform;\n ctx.clip = ctx.__originalClip;\n ctx.moveTo = ctx.__originalMoveTo;\n ctx.lineTo = ctx.__originalLineTo;\n ctx.bezierCurveTo = ctx.__originalBezierCurveTo;\n ctx.rect = ctx.__originalRect;\n ctx.closePath = ctx.__originalClosePath;\n ctx.beginPath = ctx.__originalBeginPath;\n delete ctx._removeMirroring;\n };\n ctx.save = function ctxSave() {\n destCtx.save();\n this.__originalSave();\n };\n ctx.restore = function ctxRestore() {\n destCtx.restore();\n this.__originalRestore();\n };\n ctx.translate = function ctxTranslate(x, y) {\n destCtx.translate(x, y);\n this.__originalTranslate(x, y);\n };\n ctx.scale = function ctxScale(x, y) {\n destCtx.scale(x, y);\n this.__originalScale(x, y);\n };\n ctx.transform = function ctxTransform(a, b, c, d, e, f) {\n destCtx.transform(a, b, c, d, e, f);\n this.__originalTransform(a, b, c, d, e, f);\n };\n ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {\n destCtx.setTransform(a, b, c, d, e, f);\n this.__originalSetTransform(a, b, c, d, e, f);\n };\n ctx.resetTransform = function ctxResetTransform() {\n destCtx.resetTransform();\n this.__originalResetTransform();\n };\n ctx.rotate = function ctxRotate(angle) {\n destCtx.rotate(angle);\n this.__originalRotate(angle);\n };\n ctx.clip = function ctxRotate(rule) {\n destCtx.clip(rule);\n this.__originalClip(rule);\n };\n ctx.moveTo = function (x, y) {\n destCtx.moveTo(x, y);\n this.__originalMoveTo(x, y);\n };\n ctx.lineTo = function (x, y) {\n destCtx.lineTo(x, y);\n this.__originalLineTo(x, y);\n };\n ctx.bezierCurveTo = function (cp1x, cp1y, cp2x, cp2y, x, y) {\n destCtx.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);\n this.__originalBezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);\n };\n ctx.rect = function (x, y, width, height) {\n destCtx.rect(x, y, width, height);\n this.__originalRect(x, y, width, height);\n };\n ctx.closePath = function () {\n destCtx.closePath();\n this.__originalClosePath();\n };\n ctx.beginPath = function () {\n destCtx.beginPath();\n this.__originalBeginPath();\n };\n}\nclass CachedCanvases {\n constructor(canvasFactory) {\n this.canvasFactory = canvasFactory;\n this.cache = Object.create(null);\n }\n getCanvas(id, width, height) {\n let canvasEntry;\n if (this.cache[id] !== undefined) {\n canvasEntry = this.cache[id];\n this.canvasFactory.reset(canvasEntry, width, height);\n } else {\n canvasEntry = this.canvasFactory.create(width, height);\n this.cache[id] = canvasEntry;\n }\n return canvasEntry;\n }\n delete(id) {\n delete this.cache[id];\n }\n clear() {\n for (const id in this.cache) {\n const canvasEntry = this.cache[id];\n this.canvasFactory.destroy(canvasEntry);\n delete this.cache[id];\n }\n }\n}\nfunction drawImageAtIntegerCoords(ctx, srcImg, srcX, srcY, srcW, srcH, destX, destY, destW, destH) {\n const [a, b, c, d, tx, ty] = getCurrentTransform(ctx);\n if (b === 0 && c === 0) {\n const tlX = destX * a + tx;\n const rTlX = Math.round(tlX);\n const tlY = destY * d + ty;\n const rTlY = Math.round(tlY);\n const brX = (destX + destW) * a + tx;\n const rWidth = Math.abs(Math.round(brX) - rTlX) || 1;\n const brY = (destY + destH) * d + ty;\n const rHeight = Math.abs(Math.round(brY) - rTlY) || 1;\n ctx.setTransform(Math.sign(a), 0, 0, Math.sign(d), rTlX, rTlY);\n ctx.drawImage(srcImg, srcX, srcY, srcW, srcH, 0, 0, rWidth, rHeight);\n ctx.setTransform(a, b, c, d, tx, ty);\n return [rWidth, rHeight];\n }\n if (a === 0 && d === 0) {\n const tlX = destY * c + tx;\n const rTlX = Math.round(tlX);\n const tlY = destX * b + ty;\n const rTlY = Math.round(tlY);\n const brX = (destY + destH) * c + tx;\n const rWidth = Math.abs(Math.round(brX) - rTlX) || 1;\n const brY = (destX + destW) * b + ty;\n const rHeight = Math.abs(Math.round(brY) - rTlY) || 1;\n ctx.setTransform(0, Math.sign(b), Math.sign(c), 0, rTlX, rTlY);\n ctx.drawImage(srcImg, srcX, srcY, srcW, srcH, 0, 0, rHeight, rWidth);\n ctx.setTransform(a, b, c, d, tx, ty);\n return [rHeight, rWidth];\n }\n ctx.drawImage(srcImg, srcX, srcY, srcW, srcH, destX, destY, destW, destH);\n const scaleX = Math.hypot(a, b);\n const scaleY = Math.hypot(c, d);\n return [scaleX * destW, scaleY * destH];\n}\nfunction compileType3Glyph(imgData) {\n const {\n width,\n height\n } = imgData;\n if (width > MAX_SIZE_TO_COMPILE || height > MAX_SIZE_TO_COMPILE) {\n return null;\n }\n const POINT_TO_PROCESS_LIMIT = 1000;\n const POINT_TYPES = new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);\n const width1 = width + 1;\n let points = new Uint8Array(width1 * (height + 1));\n let i, j, j0;\n const lineSize = width + 7 & ~7;\n let data = new Uint8Array(lineSize * height),\n pos = 0;\n for (const elem of imgData.data) {\n let mask = 128;\n while (mask > 0) {\n data[pos++] = elem & mask ? 0 : 255;\n mask >>= 1;\n }\n }\n let count = 0;\n pos = 0;\n if (data[pos] !== 0) {\n points[0] = 1;\n ++count;\n }\n for (j = 1; j < width; j++) {\n if (data[pos] !== data[pos + 1]) {\n points[j] = data[pos] ? 2 : 1;\n ++count;\n }\n pos++;\n }\n if (data[pos] !== 0) {\n points[j] = 2;\n ++count;\n }\n for (i = 1; i < height; i++) {\n pos = i * lineSize;\n j0 = i * width1;\n if (data[pos - lineSize] !== data[pos]) {\n points[j0] = data[pos] ? 1 : 8;\n ++count;\n }\n let sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);\n for (j = 1; j < width; j++) {\n sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + (data[pos - lineSize + 1] ? 8 : 0);\n if (POINT_TYPES[sum]) {\n points[j0 + j] = POINT_TYPES[sum];\n ++count;\n }\n pos++;\n }\n if (data[pos - lineSize] !== data[pos]) {\n points[j0 + j] = data[pos] ? 2 : 4;\n ++count;\n }\n if (count > POINT_TO_PROCESS_LIMIT) {\n return null;\n }\n }\n pos = lineSize * (height - 1);\n j0 = i * width1;\n if (data[pos] !== 0) {\n points[j0] = 8;\n ++count;\n }\n for (j = 1; j < width; j++) {\n if (data[pos] !== data[pos + 1]) {\n points[j0 + j] = data[pos] ? 4 : 8;\n ++count;\n }\n pos++;\n }\n if (data[pos] !== 0) {\n points[j0 + j] = 4;\n ++count;\n }\n if (count > POINT_TO_PROCESS_LIMIT) {\n return null;\n }\n const steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);\n const path = new Path2D();\n for (i = 0; count && i <= height; i++) {\n let p = i * width1;\n const end = p + width;\n while (p < end && !points[p]) {\n p++;\n }\n if (p === end) {\n continue;\n }\n path.moveTo(p % width1, i);\n const p0 = p;\n let type = points[p];\n do {\n const step = steps[type];\n do {\n p += step;\n } while (!points[p]);\n const pp = points[p];\n if (pp !== 5 && pp !== 10) {\n type = pp;\n points[p] = 0;\n } else {\n type = pp & 0x33 * type >> 4;\n points[p] &= type >> 2 | type << 2;\n }\n path.lineTo(p % width1, p / width1 | 0);\n if (!points[p]) {\n --count;\n }\n } while (p0 !== p);\n --i;\n }\n data = null;\n points = null;\n const drawOutline = function (c) {\n c.save();\n c.scale(1 / width, -1 / height);\n c.translate(0, -height);\n c.fill(path);\n c.beginPath();\n c.restore();\n };\n return drawOutline;\n}\nclass CanvasExtraState {\n constructor(width, height) {\n this.alphaIsShape = false;\n this.fontSize = 0;\n this.fontSizeScale = 1;\n this.textMatrix = IDENTITY_MATRIX;\n this.textMatrixScale = 1;\n this.fontMatrix = FONT_IDENTITY_MATRIX;\n this.leading = 0;\n this.x = 0;\n this.y = 0;\n this.lineX = 0;\n this.lineY = 0;\n this.charSpacing = 0;\n this.wordSpacing = 0;\n this.textHScale = 1;\n this.textRenderingMode = TextRenderingMode.FILL;\n this.textRise = 0;\n this.fillColor = \"#000000\";\n this.strokeColor = \"#000000\";\n this.patternFill = false;\n this.patternStroke = false;\n this.fillAlpha = 1;\n this.strokeAlpha = 1;\n this.lineWidth = 1;\n this.activeSMask = null;\n this.transferMaps = \"none\";\n this.startNewPathAndClipBox([0, 0, width, height]);\n }\n clone() {\n const clone = Object.create(this);\n clone.clipBox = this.clipBox.slice();\n return clone;\n }\n setCurrentPoint(x, y) {\n this.x = x;\n this.y = y;\n }\n updatePathMinMax(transform, x, y) {\n [x, y] = Util.applyTransform([x, y], transform);\n this.minX = Math.min(this.minX, x);\n this.minY = Math.min(this.minY, y);\n this.maxX = Math.max(this.maxX, x);\n this.maxY = Math.max(this.maxY, y);\n }\n updateRectMinMax(transform, rect) {\n const p1 = Util.applyTransform(rect, transform);\n const p2 = Util.applyTransform(rect.slice(2), transform);\n const p3 = Util.applyTransform([rect[0], rect[3]], transform);\n const p4 = Util.applyTransform([rect[2], rect[1]], transform);\n this.minX = Math.min(this.minX, p1[0], p2[0], p3[0], p4[0]);\n this.minY = Math.min(this.minY, p1[1], p2[1], p3[1], p4[1]);\n this.maxX = Math.max(this.maxX, p1[0], p2[0], p3[0], p4[0]);\n this.maxY = Math.max(this.maxY, p1[1], p2[1], p3[1], p4[1]);\n }\n updateScalingPathMinMax(transform, minMax) {\n Util.scaleMinMax(transform, minMax);\n this.minX = Math.min(this.minX, minMax[0]);\n this.minY = Math.min(this.minY, minMax[1]);\n this.maxX = Math.max(this.maxX, minMax[2]);\n this.maxY = Math.max(this.maxY, minMax[3]);\n }\n updateCurvePathMinMax(transform, x0, y0, x1, y1, x2, y2, x3, y3, minMax) {\n const box = Util.bezierBoundingBox(x0, y0, x1, y1, x2, y2, x3, y3, minMax);\n if (minMax) {\n return;\n }\n this.updateRectMinMax(transform, box);\n }\n getPathBoundingBox(pathType = PathType.FILL, transform = null) {\n const box = [this.minX, this.minY, this.maxX, this.maxY];\n if (pathType === PathType.STROKE) {\n if (!transform) {\n unreachable(\"Stroke bounding box must include transform.\");\n }\n const scale = Util.singularValueDecompose2dScale(transform);\n const xStrokePad = scale[0] * this.lineWidth / 2;\n const yStrokePad = scale[1] * this.lineWidth / 2;\n box[0] -= xStrokePad;\n box[1] -= yStrokePad;\n box[2] += xStrokePad;\n box[3] += yStrokePad;\n }\n return box;\n }\n updateClipFromPath() {\n const intersect = Util.intersect(this.clipBox, this.getPathBoundingBox());\n this.startNewPathAndClipBox(intersect || [0, 0, 0, 0]);\n }\n isEmptyClip() {\n return this.minX === Infinity;\n }\n startNewPathAndClipBox(box) {\n this.clipBox = box;\n this.minX = Infinity;\n this.minY = Infinity;\n this.maxX = 0;\n this.maxY = 0;\n }\n getClippedPathBoundingBox(pathType = PathType.FILL, transform = null) {\n return Util.intersect(this.clipBox, this.getPathBoundingBox(pathType, transform));\n }\n}\nfunction putBinaryImageData(ctx, imgData) {\n if (imgData instanceof ImageData) {\n ctx.putImageData(imgData, 0, 0);\n return;\n }\n const height = imgData.height,\n width = imgData.width;\n const partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n const fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n const totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n const chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n let srcPos = 0,\n destPos;\n const src = imgData.data;\n const dest = chunkImgData.data;\n let i, j, thisChunkHeight, elemsInThisChunk;\n if (imgData.kind === util_ImageKind.GRAYSCALE_1BPP) {\n const srcLength = src.byteLength;\n const dest32 = new Uint32Array(dest.buffer, 0, dest.byteLength >> 2);\n const dest32DataLength = dest32.length;\n const fullSrcDiff = width + 7 >> 3;\n const white = 0xffffffff;\n const black = util_FeatureTest.isLittleEndian ? 0xff000000 : 0x000000ff;\n for (i = 0; i < totalChunks; i++) {\n thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n destPos = 0;\n for (j = 0; j < thisChunkHeight; j++) {\n const srcDiff = srcLength - srcPos;\n let k = 0;\n const kEnd = srcDiff > fullSrcDiff ? width : srcDiff * 8 - 7;\n const kEndUnrolled = kEnd & ~7;\n let mask = 0;\n let srcByte = 0;\n for (; k < kEndUnrolled; k += 8) {\n srcByte = src[srcPos++];\n dest32[destPos++] = srcByte & 128 ? white : black;\n dest32[destPos++] = srcByte & 64 ? white : black;\n dest32[destPos++] = srcByte & 32 ? white : black;\n dest32[destPos++] = srcByte & 16 ? white : black;\n dest32[destPos++] = srcByte & 8 ? white : black;\n dest32[destPos++] = srcByte & 4 ? white : black;\n dest32[destPos++] = srcByte & 2 ? white : black;\n dest32[destPos++] = srcByte & 1 ? white : black;\n }\n for (; k < kEnd; k++) {\n if (mask === 0) {\n srcByte = src[srcPos++];\n mask = 128;\n }\n dest32[destPos++] = srcByte & mask ? white : black;\n mask >>= 1;\n }\n }\n while (destPos < dest32DataLength) {\n dest32[destPos++] = 0;\n }\n ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n }\n } else if (imgData.kind === util_ImageKind.RGBA_32BPP) {\n j = 0;\n elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;\n for (i = 0; i < fullChunks; i++) {\n dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n srcPos += elemsInThisChunk;\n ctx.putImageData(chunkImgData, 0, j);\n j += FULL_CHUNK_HEIGHT;\n }\n if (i < totalChunks) {\n elemsInThisChunk = width * partialChunkHeight * 4;\n dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n ctx.putImageData(chunkImgData, 0, j);\n }\n } else if (imgData.kind === util_ImageKind.RGB_24BPP) {\n thisChunkHeight = FULL_CHUNK_HEIGHT;\n elemsInThisChunk = width * thisChunkHeight;\n for (i = 0; i < totalChunks; i++) {\n if (i >= fullChunks) {\n thisChunkHeight = partialChunkHeight;\n elemsInThisChunk = width * thisChunkHeight;\n }\n destPos = 0;\n for (j = elemsInThisChunk; j--;) {\n dest[destPos++] = src[srcPos++];\n dest[destPos++] = src[srcPos++];\n dest[destPos++] = src[srcPos++];\n dest[destPos++] = 255;\n }\n ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n }\n } else {\n throw new Error(`bad image kind: ${imgData.kind}`);\n }\n}\nfunction putBinaryImageMask(ctx, imgData) {\n if (imgData.bitmap) {\n ctx.drawImage(imgData.bitmap, 0, 0);\n return;\n }\n const height = imgData.height,\n width = imgData.width;\n const partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n const fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n const totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n const chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n let srcPos = 0;\n const src = imgData.data;\n const dest = chunkImgData.data;\n for (let i = 0; i < totalChunks; i++) {\n const thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n ({\n srcPos\n } = convertBlackAndWhiteToRGBA({\n src,\n srcPos,\n dest,\n width,\n height: thisChunkHeight,\n nonBlackColor: 0\n }));\n ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n }\n}\nfunction copyCtxState(sourceCtx, destCtx) {\n const properties = [\"strokeStyle\", \"fillStyle\", \"fillRule\", \"globalAlpha\", \"lineWidth\", \"lineCap\", \"lineJoin\", \"miterLimit\", \"globalCompositeOperation\", \"font\", \"filter\"];\n for (const property of properties) {\n if (sourceCtx[property] !== undefined) {\n destCtx[property] = sourceCtx[property];\n }\n }\n if (sourceCtx.setLineDash !== undefined) {\n destCtx.setLineDash(sourceCtx.getLineDash());\n destCtx.lineDashOffset = sourceCtx.lineDashOffset;\n }\n}\nfunction resetCtxToDefault(ctx) {\n ctx.strokeStyle = ctx.fillStyle = \"#000000\";\n ctx.fillRule = \"nonzero\";\n ctx.globalAlpha = 1;\n ctx.lineWidth = 1;\n ctx.lineCap = \"butt\";\n ctx.lineJoin = \"miter\";\n ctx.miterLimit = 10;\n ctx.globalCompositeOperation = \"source-over\";\n ctx.font = \"10px sans-serif\";\n if (ctx.setLineDash !== undefined) {\n ctx.setLineDash([]);\n ctx.lineDashOffset = 0;\n }\n if (!isNodeJS) {\n const {\n filter\n } = ctx;\n if (filter !== \"none\" && filter !== \"\") {\n ctx.filter = \"none\";\n }\n }\n}\nfunction getImageSmoothingEnabled(transform, interpolate) {\n if (interpolate) {\n return true;\n }\n const scale = Util.singularValueDecompose2dScale(transform);\n scale[0] = Math.fround(scale[0]);\n scale[1] = Math.fround(scale[1]);\n const actualScale = Math.fround((globalThis.devicePixelRatio || 1) * PixelsPerInch.PDF_TO_CSS_UNITS);\n return scale[0] <= actualScale && scale[1] <= actualScale;\n}\nconst LINE_CAP_STYLES = [\"butt\", \"round\", \"square\"];\nconst LINE_JOIN_STYLES = [\"miter\", \"round\", \"bevel\"];\nconst NORMAL_CLIP = {};\nconst EO_CLIP = {};\nclass CanvasGraphics {\n constructor(canvasCtx, commonObjs, objs, canvasFactory, filterFactory, {\n optionalContentConfig,\n markedContentStack = null\n }, annotationCanvasMap, pageColors) {\n this.ctx = canvasCtx;\n this.current = new CanvasExtraState(this.ctx.canvas.width, this.ctx.canvas.height);\n this.stateStack = [];\n this.pendingClip = null;\n this.pendingEOFill = false;\n this.res = null;\n this.xobjs = null;\n this.commonObjs = commonObjs;\n this.objs = objs;\n this.canvasFactory = canvasFactory;\n this.filterFactory = filterFactory;\n this.groupStack = [];\n this.processingType3 = null;\n this.baseTransform = null;\n this.baseTransformStack = [];\n this.groupLevel = 0;\n this.smaskStack = [];\n this.smaskCounter = 0;\n this.tempSMask = null;\n this.suspendedCtx = null;\n this.contentVisible = true;\n this.markedContentStack = markedContentStack || [];\n this.optionalContentConfig = optionalContentConfig;\n this.cachedCanvases = new CachedCanvases(this.canvasFactory);\n this.cachedPatterns = new Map();\n this.annotationCanvasMap = annotationCanvasMap;\n this.viewportScale = 1;\n this.outputScaleX = 1;\n this.outputScaleY = 1;\n this.pageColors = pageColors;\n this._cachedScaleForStroking = [-1, 0];\n this._cachedGetSinglePixelWidth = null;\n this._cachedBitmapsMap = new Map();\n }\n getObject(data, fallback = null) {\n if (typeof data === \"string\") {\n return data.startsWith(\"g_\") ? this.commonObjs.get(data) : this.objs.get(data);\n }\n return fallback;\n }\n beginDrawing({\n transform,\n viewport,\n transparency = false,\n background = null\n }) {\n const width = this.ctx.canvas.width;\n const height = this.ctx.canvas.height;\n const savedFillStyle = this.ctx.fillStyle;\n this.ctx.fillStyle = background || \"#ffffff\";\n this.ctx.fillRect(0, 0, width, height);\n this.ctx.fillStyle = savedFillStyle;\n if (transparency) {\n const transparentCanvas = this.cachedCanvases.getCanvas(\"transparent\", width, height);\n this.compositeCtx = this.ctx;\n this.transparentCanvas = transparentCanvas.canvas;\n this.ctx = transparentCanvas.context;\n this.ctx.save();\n this.ctx.transform(...getCurrentTransform(this.compositeCtx));\n }\n this.ctx.save();\n resetCtxToDefault(this.ctx);\n if (transform) {\n this.ctx.transform(...transform);\n this.outputScaleX = transform[0];\n this.outputScaleY = transform[0];\n }\n this.ctx.transform(...viewport.transform);\n this.viewportScale = viewport.scale;\n this.baseTransform = getCurrentTransform(this.ctx);\n }\n executeOperatorList(operatorList, executionStartIdx, continueCallback, stepper) {\n const argsArray = operatorList.argsArray;\n const fnArray = operatorList.fnArray;\n let i = executionStartIdx || 0;\n const argsArrayLen = argsArray.length;\n if (argsArrayLen === i) {\n return i;\n }\n const chunkOperations = argsArrayLen - i > EXECUTION_STEPS && typeof continueCallback === \"function\";\n const endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;\n let steps = 0;\n const commonObjs = this.commonObjs;\n const objs = this.objs;\n let fnId;\n while (true) {\n if (stepper !== undefined && i === stepper.nextBreakPoint) {\n stepper.breakIt(i, continueCallback);\n return i;\n }\n fnId = fnArray[i];\n if (fnId !== OPS.dependency) {\n this[fnId].apply(this, argsArray[i]);\n } else {\n for (const depObjId of argsArray[i]) {\n const objsPool = depObjId.startsWith(\"g_\") ? commonObjs : objs;\n if (!objsPool.has(depObjId)) {\n objsPool.get(depObjId, continueCallback);\n return i;\n }\n }\n }\n i++;\n if (i === argsArrayLen) {\n return i;\n }\n if (chunkOperations && ++steps > EXECUTION_STEPS) {\n if (Date.now() > endTime) {\n continueCallback();\n return i;\n }\n steps = 0;\n }\n }\n }\n #restoreInitialState() {\n while (this.stateStack.length || this.inSMaskMode) {\n this.restore();\n }\n this.current.activeSMask = null;\n this.ctx.restore();\n if (this.transparentCanvas) {\n this.ctx = this.compositeCtx;\n this.ctx.save();\n this.ctx.setTransform(1, 0, 0, 1, 0, 0);\n this.ctx.drawImage(this.transparentCanvas, 0, 0);\n this.ctx.restore();\n this.transparentCanvas = null;\n }\n }\n endDrawing() {\n this.#restoreInitialState();\n this.cachedCanvases.clear();\n this.cachedPatterns.clear();\n for (const cache of this._cachedBitmapsMap.values()) {\n for (const canvas of cache.values()) {\n if (typeof HTMLCanvasElement !== \"undefined\" && canvas instanceof HTMLCanvasElement) {\n canvas.width = canvas.height = 0;\n }\n }\n cache.clear();\n }\n this._cachedBitmapsMap.clear();\n this.#drawFilter();\n }\n #drawFilter() {\n if (this.pageColors) {\n const hcmFilterId = this.filterFactory.addHCMFilter(this.pageColors.foreground, this.pageColors.background);\n if (hcmFilterId !== \"none\") {\n const savedFilter = this.ctx.filter;\n this.ctx.filter = hcmFilterId;\n this.ctx.drawImage(this.ctx.canvas, 0, 0);\n this.ctx.filter = savedFilter;\n }\n }\n }\n _scaleImage(img, inverseTransform) {\n const width = img.width ?? img.displayWidth;\n const height = img.height ?? img.displayHeight;\n let widthScale = Math.max(Math.hypot(inverseTransform[0], inverseTransform[1]), 1);\n let heightScale = Math.max(Math.hypot(inverseTransform[2], inverseTransform[3]), 1);\n let paintWidth = width,\n paintHeight = height;\n let tmpCanvasId = \"prescale1\";\n let tmpCanvas, tmpCtx;\n while (widthScale > 2 && paintWidth > 1 || heightScale > 2 && paintHeight > 1) {\n let newWidth = paintWidth,\n newHeight = paintHeight;\n if (widthScale > 2 && paintWidth > 1) {\n newWidth = paintWidth >= 16384 ? Math.floor(paintWidth / 2) - 1 || 1 : Math.ceil(paintWidth / 2);\n widthScale /= paintWidth / newWidth;\n }\n if (heightScale > 2 && paintHeight > 1) {\n newHeight = paintHeight >= 16384 ? Math.floor(paintHeight / 2) - 1 || 1 : Math.ceil(paintHeight) / 2;\n heightScale /= paintHeight / newHeight;\n }\n tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight);\n tmpCtx = tmpCanvas.context;\n tmpCtx.clearRect(0, 0, newWidth, newHeight);\n tmpCtx.drawImage(img, 0, 0, paintWidth, paintHeight, 0, 0, newWidth, newHeight);\n img = tmpCanvas.canvas;\n paintWidth = newWidth;\n paintHeight = newHeight;\n tmpCanvasId = tmpCanvasId === \"prescale1\" ? \"prescale2\" : \"prescale1\";\n }\n return {\n img,\n paintWidth,\n paintHeight\n };\n }\n _createMaskCanvas(img) {\n const ctx = this.ctx;\n const {\n width,\n height\n } = img;\n const fillColor = this.current.fillColor;\n const isPatternFill = this.current.patternFill;\n const currentTransform = getCurrentTransform(ctx);\n let cache, cacheKey, scaled, maskCanvas;\n if ((img.bitmap || img.data) && img.count > 1) {\n const mainKey = img.bitmap || img.data.buffer;\n cacheKey = JSON.stringify(isPatternFill ? currentTransform : [currentTransform.slice(0, 4), fillColor]);\n cache = this._cachedBitmapsMap.get(mainKey);\n if (!cache) {\n cache = new Map();\n this._cachedBitmapsMap.set(mainKey, cache);\n }\n const cachedImage = cache.get(cacheKey);\n if (cachedImage && !isPatternFill) {\n const offsetX = Math.round(Math.min(currentTransform[0], currentTransform[2]) + currentTransform[4]);\n const offsetY = Math.round(Math.min(currentTransform[1], currentTransform[3]) + currentTransform[5]);\n return {\n canvas: cachedImage,\n offsetX,\n offsetY\n };\n }\n scaled = cachedImage;\n }\n if (!scaled) {\n maskCanvas = this.cachedCanvases.getCanvas(\"maskCanvas\", width, height);\n putBinaryImageMask(maskCanvas.context, img);\n }\n let maskToCanvas = Util.transform(currentTransform, [1 / width, 0, 0, -1 / height, 0, 0]);\n maskToCanvas = Util.transform(maskToCanvas, [1, 0, 0, 1, 0, -height]);\n const [minX, minY, maxX, maxY] = Util.getAxialAlignedBoundingBox([0, 0, width, height], maskToCanvas);\n const drawnWidth = Math.round(maxX - minX) || 1;\n const drawnHeight = Math.round(maxY - minY) || 1;\n const fillCanvas = this.cachedCanvases.getCanvas(\"fillCanvas\", drawnWidth, drawnHeight);\n const fillCtx = fillCanvas.context;\n const offsetX = minX;\n const offsetY = minY;\n fillCtx.translate(-offsetX, -offsetY);\n fillCtx.transform(...maskToCanvas);\n if (!scaled) {\n scaled = this._scaleImage(maskCanvas.canvas, getCurrentTransformInverse(fillCtx));\n scaled = scaled.img;\n if (cache && isPatternFill) {\n cache.set(cacheKey, scaled);\n }\n }\n fillCtx.imageSmoothingEnabled = getImageSmoothingEnabled(getCurrentTransform(fillCtx), img.interpolate);\n drawImageAtIntegerCoords(fillCtx, scaled, 0, 0, scaled.width, scaled.height, 0, 0, width, height);\n fillCtx.globalCompositeOperation = \"source-in\";\n const inverse = Util.transform(getCurrentTransformInverse(fillCtx), [1, 0, 0, 1, -offsetX, -offsetY]);\n fillCtx.fillStyle = isPatternFill ? fillColor.getPattern(ctx, this, inverse, PathType.FILL) : fillColor;\n fillCtx.fillRect(0, 0, width, height);\n if (cache && !isPatternFill) {\n this.cachedCanvases.delete(\"fillCanvas\");\n cache.set(cacheKey, fillCanvas.canvas);\n }\n return {\n canvas: fillCanvas.canvas,\n offsetX: Math.round(offsetX),\n offsetY: Math.round(offsetY)\n };\n }\n setLineWidth(width) {\n if (width !== this.current.lineWidth) {\n this._cachedScaleForStroking[0] = -1;\n }\n this.current.lineWidth = width;\n this.ctx.lineWidth = width;\n }\n setLineCap(style) {\n this.ctx.lineCap = LINE_CAP_STYLES[style];\n }\n setLineJoin(style) {\n this.ctx.lineJoin = LINE_JOIN_STYLES[style];\n }\n setMiterLimit(limit) {\n this.ctx.miterLimit = limit;\n }\n setDash(dashArray, dashPhase) {\n const ctx = this.ctx;\n if (ctx.setLineDash !== undefined) {\n ctx.setLineDash(dashArray);\n ctx.lineDashOffset = dashPhase;\n }\n }\n setRenderingIntent(intent) {}\n setFlatness(flatness) {}\n setGState(states) {\n for (const [key, value] of states) {\n switch (key) {\n case \"LW\":\n this.setLineWidth(value);\n break;\n case \"LC\":\n this.setLineCap(value);\n break;\n case \"LJ\":\n this.setLineJoin(value);\n break;\n case \"ML\":\n this.setMiterLimit(value);\n break;\n case \"D\":\n this.setDash(value[0], value[1]);\n break;\n case \"RI\":\n this.setRenderingIntent(value);\n break;\n case \"FL\":\n this.setFlatness(value);\n break;\n case \"Font\":\n this.setFont(value[0], value[1]);\n break;\n case \"CA\":\n this.current.strokeAlpha = value;\n break;\n case \"ca\":\n this.current.fillAlpha = value;\n this.ctx.globalAlpha = value;\n break;\n case \"BM\":\n this.ctx.globalCompositeOperation = value;\n break;\n case \"SMask\":\n this.current.activeSMask = value ? this.tempSMask : null;\n this.tempSMask = null;\n this.checkSMaskState();\n break;\n case \"TR\":\n this.ctx.filter = this.current.transferMaps = this.filterFactory.addFilter(value);\n break;\n }\n }\n }\n get inSMaskMode() {\n return !!this.suspendedCtx;\n }\n checkSMaskState() {\n const inSMaskMode = this.inSMaskMode;\n if (this.current.activeSMask && !inSMaskMode) {\n this.beginSMaskMode();\n } else if (!this.current.activeSMask && inSMaskMode) {\n this.endSMaskMode();\n }\n }\n beginSMaskMode() {\n if (this.inSMaskMode) {\n throw new Error(\"beginSMaskMode called while already in smask mode\");\n }\n const drawnWidth = this.ctx.canvas.width;\n const drawnHeight = this.ctx.canvas.height;\n const cacheId = \"smaskGroupAt\" + this.groupLevel;\n const scratchCanvas = this.cachedCanvases.getCanvas(cacheId, drawnWidth, drawnHeight);\n this.suspendedCtx = this.ctx;\n this.ctx = scratchCanvas.context;\n const ctx = this.ctx;\n ctx.setTransform(...getCurrentTransform(this.suspendedCtx));\n copyCtxState(this.suspendedCtx, ctx);\n mirrorContextOperations(ctx, this.suspendedCtx);\n this.setGState([[\"BM\", \"source-over\"], [\"ca\", 1], [\"CA\", 1]]);\n }\n endSMaskMode() {\n if (!this.inSMaskMode) {\n throw new Error(\"endSMaskMode called while not in smask mode\");\n }\n this.ctx._removeMirroring();\n copyCtxState(this.ctx, this.suspendedCtx);\n this.ctx = this.suspendedCtx;\n this.suspendedCtx = null;\n }\n compose(dirtyBox) {\n if (!this.current.activeSMask) {\n return;\n }\n if (!dirtyBox) {\n dirtyBox = [0, 0, this.ctx.canvas.width, this.ctx.canvas.height];\n } else {\n dirtyBox[0] = Math.floor(dirtyBox[0]);\n dirtyBox[1] = Math.floor(dirtyBox[1]);\n dirtyBox[2] = Math.ceil(dirtyBox[2]);\n dirtyBox[3] = Math.ceil(dirtyBox[3]);\n }\n const smask = this.current.activeSMask;\n const suspendedCtx = this.suspendedCtx;\n this.composeSMask(suspendedCtx, smask, this.ctx, dirtyBox);\n this.ctx.save();\n this.ctx.setTransform(1, 0, 0, 1, 0, 0);\n this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);\n this.ctx.restore();\n }\n composeSMask(ctx, smask, layerCtx, layerBox) {\n const layerOffsetX = layerBox[0];\n const layerOffsetY = layerBox[1];\n const layerWidth = layerBox[2] - layerOffsetX;\n const layerHeight = layerBox[3] - layerOffsetY;\n if (layerWidth === 0 || layerHeight === 0) {\n return;\n }\n this.genericComposeSMask(smask.context, layerCtx, layerWidth, layerHeight, smask.subtype, smask.backdrop, smask.transferMap, layerOffsetX, layerOffsetY, smask.offsetX, smask.offsetY);\n ctx.save();\n ctx.globalAlpha = 1;\n ctx.globalCompositeOperation = \"source-over\";\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n ctx.drawImage(layerCtx.canvas, 0, 0);\n ctx.restore();\n }\n genericComposeSMask(maskCtx, layerCtx, width, height, subtype, backdrop, transferMap, layerOffsetX, layerOffsetY, maskOffsetX, maskOffsetY) {\n let maskCanvas = maskCtx.canvas;\n let maskX = layerOffsetX - maskOffsetX;\n let maskY = layerOffsetY - maskOffsetY;\n if (backdrop) {\n const backdropRGB = Util.makeHexColor(...backdrop);\n if (maskX < 0 || maskY < 0 || maskX + width > maskCanvas.width || maskY + height > maskCanvas.height) {\n const canvas = this.cachedCanvases.getCanvas(\"maskExtension\", width, height);\n const ctx = canvas.context;\n ctx.drawImage(maskCanvas, -maskX, -maskY);\n ctx.globalCompositeOperation = \"destination-atop\";\n ctx.fillStyle = backdropRGB;\n ctx.fillRect(0, 0, width, height);\n ctx.globalCompositeOperation = \"source-over\";\n maskCanvas = canvas.canvas;\n maskX = maskY = 0;\n } else {\n maskCtx.save();\n maskCtx.globalAlpha = 1;\n maskCtx.setTransform(1, 0, 0, 1, 0, 0);\n const clip = new Path2D();\n clip.rect(maskX, maskY, width, height);\n maskCtx.clip(clip);\n maskCtx.globalCompositeOperation = \"destination-atop\";\n maskCtx.fillStyle = backdropRGB;\n maskCtx.fillRect(maskX, maskY, width, height);\n maskCtx.restore();\n }\n }\n layerCtx.save();\n layerCtx.globalAlpha = 1;\n layerCtx.setTransform(1, 0, 0, 1, 0, 0);\n if (subtype === \"Alpha\" && transferMap) {\n layerCtx.filter = this.filterFactory.addAlphaFilter(transferMap);\n } else if (subtype === \"Luminosity\") {\n layerCtx.filter = this.filterFactory.addLuminosityFilter(transferMap);\n }\n const clip = new Path2D();\n clip.rect(layerOffsetX, layerOffsetY, width, height);\n layerCtx.clip(clip);\n layerCtx.globalCompositeOperation = \"destination-in\";\n layerCtx.drawImage(maskCanvas, maskX, maskY, width, height, layerOffsetX, layerOffsetY, width, height);\n layerCtx.restore();\n }\n save() {\n if (this.inSMaskMode) {\n copyCtxState(this.ctx, this.suspendedCtx);\n this.suspendedCtx.save();\n } else {\n this.ctx.save();\n }\n const old = this.current;\n this.stateStack.push(old);\n this.current = old.clone();\n }\n restore() {\n if (this.stateStack.length === 0 && this.inSMaskMode) {\n this.endSMaskMode();\n }\n if (this.stateStack.length !== 0) {\n this.current = this.stateStack.pop();\n if (this.inSMaskMode) {\n this.suspendedCtx.restore();\n copyCtxState(this.suspendedCtx, this.ctx);\n } else {\n this.ctx.restore();\n }\n this.checkSMaskState();\n this.pendingClip = null;\n this._cachedScaleForStroking[0] = -1;\n this._cachedGetSinglePixelWidth = null;\n }\n }\n transform(a, b, c, d, e, f) {\n this.ctx.transform(a, b, c, d, e, f);\n this._cachedScaleForStroking[0] = -1;\n this._cachedGetSinglePixelWidth = null;\n }\n constructPath(ops, args, minMax) {\n const ctx = this.ctx;\n const current = this.current;\n let x = current.x,\n y = current.y;\n let startX, startY;\n const currentTransform = getCurrentTransform(ctx);\n const isScalingMatrix = currentTransform[0] === 0 && currentTransform[3] === 0 || currentTransform[1] === 0 && currentTransform[2] === 0;\n const minMaxForBezier = isScalingMatrix ? minMax.slice(0) : null;\n for (let i = 0, j = 0, ii = ops.length; i < ii; i++) {\n switch (ops[i] | 0) {\n case OPS.rectangle:\n x = args[j++];\n y = args[j++];\n const width = args[j++];\n const height = args[j++];\n const xw = x + width;\n const yh = y + height;\n ctx.moveTo(x, y);\n if (width === 0 || height === 0) {\n ctx.lineTo(xw, yh);\n } else {\n ctx.lineTo(xw, y);\n ctx.lineTo(xw, yh);\n ctx.lineTo(x, yh);\n }\n if (!isScalingMatrix) {\n current.updateRectMinMax(currentTransform, [x, y, xw, yh]);\n }\n ctx.closePath();\n break;\n case OPS.moveTo:\n x = args[j++];\n y = args[j++];\n ctx.moveTo(x, y);\n if (!isScalingMatrix) {\n current.updatePathMinMax(currentTransform, x, y);\n }\n break;\n case OPS.lineTo:\n x = args[j++];\n y = args[j++];\n ctx.lineTo(x, y);\n if (!isScalingMatrix) {\n current.updatePathMinMax(currentTransform, x, y);\n }\n break;\n case OPS.curveTo:\n startX = x;\n startY = y;\n x = args[j + 4];\n y = args[j + 5];\n ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], x, y);\n current.updateCurvePathMinMax(currentTransform, startX, startY, args[j], args[j + 1], args[j + 2], args[j + 3], x, y, minMaxForBezier);\n j += 6;\n break;\n case OPS.curveTo2:\n startX = x;\n startY = y;\n ctx.bezierCurveTo(x, y, args[j], args[j + 1], args[j + 2], args[j + 3]);\n current.updateCurvePathMinMax(currentTransform, startX, startY, x, y, args[j], args[j + 1], args[j + 2], args[j + 3], minMaxForBezier);\n x = args[j + 2];\n y = args[j + 3];\n j += 4;\n break;\n case OPS.curveTo3:\n startX = x;\n startY = y;\n x = args[j + 2];\n y = args[j + 3];\n ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);\n current.updateCurvePathMinMax(currentTransform, startX, startY, args[j], args[j + 1], x, y, x, y, minMaxForBezier);\n j += 4;\n break;\n case OPS.closePath:\n ctx.closePath();\n break;\n }\n }\n if (isScalingMatrix) {\n current.updateScalingPathMinMax(currentTransform, minMaxForBezier);\n }\n current.setCurrentPoint(x, y);\n }\n closePath() {\n this.ctx.closePath();\n }\n stroke(consumePath = true) {\n const ctx = this.ctx;\n const strokeColor = this.current.strokeColor;\n ctx.globalAlpha = this.current.strokeAlpha;\n if (this.contentVisible) {\n if (typeof strokeColor === \"object\" && strokeColor?.getPattern) {\n ctx.save();\n ctx.strokeStyle = strokeColor.getPattern(ctx, this, getCurrentTransformInverse(ctx), PathType.STROKE);\n this.rescaleAndStroke(false);\n ctx.restore();\n } else {\n this.rescaleAndStroke(true);\n }\n }\n if (consumePath) {\n this.consumePath(this.current.getClippedPathBoundingBox());\n }\n ctx.globalAlpha = this.current.fillAlpha;\n }\n closeStroke() {\n this.closePath();\n this.stroke();\n }\n fill(consumePath = true) {\n const ctx = this.ctx;\n const fillColor = this.current.fillColor;\n const isPatternFill = this.current.patternFill;\n let needRestore = false;\n if (isPatternFill) {\n ctx.save();\n ctx.fillStyle = fillColor.getPattern(ctx, this, getCurrentTransformInverse(ctx), PathType.FILL);\n needRestore = true;\n }\n const intersect = this.current.getClippedPathBoundingBox();\n if (this.contentVisible && intersect !== null) {\n if (this.pendingEOFill) {\n ctx.fill(\"evenodd\");\n this.pendingEOFill = false;\n } else {\n ctx.fill();\n }\n }\n if (needRestore) {\n ctx.restore();\n }\n if (consumePath) {\n this.consumePath(intersect);\n }\n }\n eoFill() {\n this.pendingEOFill = true;\n this.fill();\n }\n fillStroke() {\n this.fill(false);\n this.stroke(false);\n this.consumePath();\n }\n eoFillStroke() {\n this.pendingEOFill = true;\n this.fillStroke();\n }\n closeFillStroke() {\n this.closePath();\n this.fillStroke();\n }\n closeEOFillStroke() {\n this.pendingEOFill = true;\n this.closePath();\n this.fillStroke();\n }\n endPath() {\n this.consumePath();\n }\n clip() {\n this.pendingClip = NORMAL_CLIP;\n }\n eoClip() {\n this.pendingClip = EO_CLIP;\n }\n beginText() {\n this.current.textMatrix = IDENTITY_MATRIX;\n this.current.textMatrixScale = 1;\n this.current.x = this.current.lineX = 0;\n this.current.y = this.current.lineY = 0;\n }\n endText() {\n const paths = this.pendingTextPaths;\n const ctx = this.ctx;\n if (paths === undefined) {\n ctx.beginPath();\n return;\n }\n const newPath = new Path2D();\n const invTransf = ctx.getTransform().invertSelf();\n for (const {\n transform,\n x,\n y,\n fontSize,\n path\n } of paths) {\n newPath.addPath(path, new DOMMatrix(transform).preMultiplySelf(invTransf).translate(x, y).scale(fontSize, -fontSize));\n }\n ctx.clip(newPath);\n ctx.beginPath();\n delete this.pendingTextPaths;\n }\n setCharSpacing(spacing) {\n this.current.charSpacing = spacing;\n }\n setWordSpacing(spacing) {\n this.current.wordSpacing = spacing;\n }\n setHScale(scale) {\n this.current.textHScale = scale / 100;\n }\n setLeading(leading) {\n this.current.leading = -leading;\n }\n setFont(fontRefName, size) {\n const fontObj = this.commonObjs.get(fontRefName);\n const current = this.current;\n if (!fontObj) {\n throw new Error(`Can't find font for ${fontRefName}`);\n }\n current.fontMatrix = fontObj.fontMatrix || FONT_IDENTITY_MATRIX;\n if (current.fontMatrix[0] === 0 || current.fontMatrix[3] === 0) {\n warn(\"Invalid font matrix for font \" + fontRefName);\n }\n if (size < 0) {\n size = -size;\n current.fontDirection = -1;\n } else {\n current.fontDirection = 1;\n }\n this.current.font = fontObj;\n this.current.fontSize = size;\n if (fontObj.isType3Font) {\n return;\n }\n const name = fontObj.loadedName || \"sans-serif\";\n const typeface = fontObj.systemFontInfo?.css || `\"${name}\", ${fontObj.fallbackName}`;\n let bold = \"normal\";\n if (fontObj.black) {\n bold = \"900\";\n } else if (fontObj.bold) {\n bold = \"bold\";\n }\n const italic = fontObj.italic ? \"italic\" : \"normal\";\n let browserFontSize = size;\n if (size < MIN_FONT_SIZE) {\n browserFontSize = MIN_FONT_SIZE;\n } else if (size > MAX_FONT_SIZE) {\n browserFontSize = MAX_FONT_SIZE;\n }\n this.current.fontSizeScale = size / browserFontSize;\n this.ctx.font = `${italic} ${bold} ${browserFontSize}px ${typeface}`;\n }\n setTextRenderingMode(mode) {\n this.current.textRenderingMode = mode;\n }\n setTextRise(rise) {\n this.current.textRise = rise;\n }\n moveText(x, y) {\n this.current.x = this.current.lineX += x;\n this.current.y = this.current.lineY += y;\n }\n setLeadingMoveText(x, y) {\n this.setLeading(-y);\n this.moveText(x, y);\n }\n setTextMatrix(a, b, c, d, e, f) {\n this.current.textMatrix = [a, b, c, d, e, f];\n this.current.textMatrixScale = Math.hypot(a, b);\n this.current.x = this.current.lineX = 0;\n this.current.y = this.current.lineY = 0;\n }\n nextLine() {\n this.moveText(0, this.current.leading);\n }\n #getScaledPath(path, currentTransform, transform) {\n const newPath = new Path2D();\n newPath.addPath(path, new DOMMatrix(transform).invertSelf().multiplySelf(currentTransform));\n return newPath;\n }\n paintChar(character, x, y, patternFillTransform, patternStrokeTransform) {\n const ctx = this.ctx;\n const current = this.current;\n const font = current.font;\n const textRenderingMode = current.textRenderingMode;\n const fontSize = current.fontSize / current.fontSizeScale;\n const fillStrokeMode = textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n const isAddToPathSet = !!(textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG);\n const patternFill = current.patternFill && !font.missingFile;\n const patternStroke = current.patternStroke && !font.missingFile;\n let path;\n if (font.disableFontFace || isAddToPathSet || patternFill || patternStroke) {\n path = font.getPathGenerator(this.commonObjs, character);\n }\n if (font.disableFontFace || patternFill || patternStroke) {\n ctx.save();\n ctx.translate(x, y);\n ctx.scale(fontSize, -fontSize);\n if (fillStrokeMode === TextRenderingMode.FILL || fillStrokeMode === TextRenderingMode.FILL_STROKE) {\n if (patternFillTransform) {\n const currentTransform = ctx.getTransform();\n ctx.setTransform(...patternFillTransform);\n ctx.fill(this.#getScaledPath(path, currentTransform, patternFillTransform));\n } else {\n ctx.fill(path);\n }\n }\n if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {\n if (patternStrokeTransform) {\n const currentTransform = ctx.getTransform();\n ctx.setTransform(...patternStrokeTransform);\n ctx.stroke(this.#getScaledPath(path, currentTransform, patternStrokeTransform));\n } else {\n ctx.lineWidth /= fontSize;\n ctx.stroke(path);\n }\n }\n ctx.restore();\n } else {\n if (fillStrokeMode === TextRenderingMode.FILL || fillStrokeMode === TextRenderingMode.FILL_STROKE) {\n ctx.fillText(character, x, y);\n }\n if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {\n ctx.strokeText(character, x, y);\n }\n }\n if (isAddToPathSet) {\n const paths = this.pendingTextPaths ||= [];\n paths.push({\n transform: getCurrentTransform(ctx),\n x,\n y,\n fontSize,\n path\n });\n }\n }\n get isFontSubpixelAAEnabled() {\n const {\n context: ctx\n } = this.cachedCanvases.getCanvas(\"isFontSubpixelAAEnabled\", 10, 10);\n ctx.scale(1.5, 1);\n ctx.fillText(\"I\", 0, 10);\n const data = ctx.getImageData(0, 0, 10, 10).data;\n let enabled = false;\n for (let i = 3; i < data.length; i += 4) {\n if (data[i] > 0 && data[i] < 255) {\n enabled = true;\n break;\n }\n }\n return shadow(this, \"isFontSubpixelAAEnabled\", enabled);\n }\n showText(glyphs) {\n const current = this.current;\n const font = current.font;\n if (font.isType3Font) {\n return this.showType3Text(glyphs);\n }\n const fontSize = current.fontSize;\n if (fontSize === 0) {\n return undefined;\n }\n const ctx = this.ctx;\n const fontSizeScale = current.fontSizeScale;\n const charSpacing = current.charSpacing;\n const wordSpacing = current.wordSpacing;\n const fontDirection = current.fontDirection;\n const textHScale = current.textHScale * fontDirection;\n const glyphsLength = glyphs.length;\n const vertical = font.vertical;\n const spacingDir = vertical ? 1 : -1;\n const defaultVMetrics = font.defaultVMetrics;\n const widthAdvanceScale = fontSize * current.fontMatrix[0];\n const simpleFillText = current.textRenderingMode === TextRenderingMode.FILL && !font.disableFontFace && !current.patternFill;\n ctx.save();\n ctx.transform(...current.textMatrix);\n ctx.translate(current.x, current.y + current.textRise);\n if (fontDirection > 0) {\n ctx.scale(textHScale, -1);\n } else {\n ctx.scale(textHScale, 1);\n }\n let patternFillTransform, patternStrokeTransform;\n if (current.patternFill) {\n ctx.save();\n const pattern = current.fillColor.getPattern(ctx, this, getCurrentTransformInverse(ctx), PathType.FILL);\n patternFillTransform = getCurrentTransform(ctx);\n ctx.restore();\n ctx.fillStyle = pattern;\n }\n if (current.patternStroke) {\n ctx.save();\n const pattern = current.strokeColor.getPattern(ctx, this, getCurrentTransformInverse(ctx), PathType.STROKE);\n patternStrokeTransform = getCurrentTransform(ctx);\n ctx.restore();\n ctx.strokeStyle = pattern;\n }\n let lineWidth = current.lineWidth;\n const scale = current.textMatrixScale;\n if (scale === 0 || lineWidth === 0) {\n const fillStrokeMode = current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {\n lineWidth = this.getSinglePixelWidth();\n }\n } else {\n lineWidth /= scale;\n }\n if (fontSizeScale !== 1.0) {\n ctx.scale(fontSizeScale, fontSizeScale);\n lineWidth /= fontSizeScale;\n }\n ctx.lineWidth = lineWidth;\n if (font.isInvalidPDFjsFont) {\n const chars = [];\n let width = 0;\n for (const glyph of glyphs) {\n chars.push(glyph.unicode);\n width += glyph.width;\n }\n ctx.fillText(chars.join(\"\"), 0, 0);\n current.x += width * widthAdvanceScale * textHScale;\n ctx.restore();\n this.compose();\n return undefined;\n }\n let x = 0,\n i;\n for (i = 0; i < glyphsLength; ++i) {\n const glyph = glyphs[i];\n if (typeof glyph === \"number\") {\n x += spacingDir * glyph * fontSize / 1000;\n continue;\n }\n let restoreNeeded = false;\n const spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n const character = glyph.fontChar;\n const accent = glyph.accent;\n let scaledX, scaledY;\n let width = glyph.width;\n if (vertical) {\n const vmetric = glyph.vmetric || defaultVMetrics;\n const vx = -(glyph.vmetric ? vmetric[1] : width * 0.5) * widthAdvanceScale;\n const vy = vmetric[2] * widthAdvanceScale;\n width = vmetric ? -vmetric[0] : width;\n scaledX = vx / fontSizeScale;\n scaledY = (x + vy) / fontSizeScale;\n } else {\n scaledX = x / fontSizeScale;\n scaledY = 0;\n }\n if (font.remeasure && width > 0) {\n const measuredWidth = ctx.measureText(character).width * 1000 / fontSize * fontSizeScale;\n if (width < measuredWidth && this.isFontSubpixelAAEnabled) {\n const characterScaleX = width / measuredWidth;\n restoreNeeded = true;\n ctx.save();\n ctx.scale(characterScaleX, 1);\n scaledX /= characterScaleX;\n } else if (width !== measuredWidth) {\n scaledX += (width - measuredWidth) / 2000 * fontSize / fontSizeScale;\n }\n }\n if (this.contentVisible && (glyph.isInFont || font.missingFile)) {\n if (simpleFillText && !accent) {\n ctx.fillText(character, scaledX, scaledY);\n } else {\n this.paintChar(character, scaledX, scaledY, patternFillTransform, patternStrokeTransform);\n if (accent) {\n const scaledAccentX = scaledX + fontSize * accent.offset.x / fontSizeScale;\n const scaledAccentY = scaledY - fontSize * accent.offset.y / fontSizeScale;\n this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY, patternFillTransform, patternStrokeTransform);\n }\n }\n }\n const charWidth = vertical ? width * widthAdvanceScale - spacing * fontDirection : width * widthAdvanceScale + spacing * fontDirection;\n x += charWidth;\n if (restoreNeeded) {\n ctx.restore();\n }\n }\n if (vertical) {\n current.y -= x;\n } else {\n current.x += x * textHScale;\n }\n ctx.restore();\n this.compose();\n return undefined;\n }\n showType3Text(glyphs) {\n const ctx = this.ctx;\n const current = this.current;\n const font = current.font;\n const fontSize = current.fontSize;\n const fontDirection = current.fontDirection;\n const spacingDir = font.vertical ? 1 : -1;\n const charSpacing = current.charSpacing;\n const wordSpacing = current.wordSpacing;\n const textHScale = current.textHScale * fontDirection;\n const fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;\n const glyphsLength = glyphs.length;\n const isTextInvisible = current.textRenderingMode === TextRenderingMode.INVISIBLE;\n let i, glyph, width, spacingLength;\n if (isTextInvisible || fontSize === 0) {\n return;\n }\n this._cachedScaleForStroking[0] = -1;\n this._cachedGetSinglePixelWidth = null;\n ctx.save();\n ctx.transform(...current.textMatrix);\n ctx.translate(current.x, current.y);\n ctx.scale(textHScale, fontDirection);\n for (i = 0; i < glyphsLength; ++i) {\n glyph = glyphs[i];\n if (typeof glyph === \"number\") {\n spacingLength = spacingDir * glyph * fontSize / 1000;\n this.ctx.translate(spacingLength, 0);\n current.x += spacingLength * textHScale;\n continue;\n }\n const spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n const operatorList = font.charProcOperatorList[glyph.operatorListId];\n if (!operatorList) {\n warn(`Type3 character \"${glyph.operatorListId}\" is not available.`);\n continue;\n }\n if (this.contentVisible) {\n this.processingType3 = glyph;\n this.save();\n ctx.scale(fontSize, fontSize);\n ctx.transform(...fontMatrix);\n this.executeOperatorList(operatorList);\n this.restore();\n }\n const transformed = Util.applyTransform([glyph.width, 0], fontMatrix);\n width = transformed[0] * fontSize + spacing;\n ctx.translate(width, 0);\n current.x += width * textHScale;\n }\n ctx.restore();\n this.processingType3 = null;\n }\n setCharWidth(xWidth, yWidth) {}\n setCharWidthAndBounds(xWidth, yWidth, llx, lly, urx, ury) {\n this.ctx.rect(llx, lly, urx - llx, ury - lly);\n this.ctx.clip();\n this.endPath();\n }\n getColorN_Pattern(IR) {\n let pattern;\n if (IR[0] === \"TilingPattern\") {\n const color = IR[1];\n const baseTransform = this.baseTransform || getCurrentTransform(this.ctx);\n const canvasGraphicsFactory = {\n createCanvasGraphics: ctx => new CanvasGraphics(ctx, this.commonObjs, this.objs, this.canvasFactory, this.filterFactory, {\n optionalContentConfig: this.optionalContentConfig,\n markedContentStack: this.markedContentStack\n })\n };\n pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, baseTransform);\n } else {\n pattern = this._getPattern(IR[1], IR[2]);\n }\n return pattern;\n }\n setStrokeColorN() {\n this.current.strokeColor = this.getColorN_Pattern(arguments);\n this.current.patternStroke = true;\n }\n setFillColorN() {\n this.current.fillColor = this.getColorN_Pattern(arguments);\n this.current.patternFill = true;\n }\n setStrokeRGBColor(r, g, b) {\n this.ctx.strokeStyle = this.current.strokeColor = Util.makeHexColor(r, g, b);\n this.current.patternStroke = false;\n }\n setStrokeTransparent() {\n this.ctx.strokeStyle = this.current.strokeColor = \"transparent\";\n this.current.patternStroke = false;\n }\n setFillRGBColor(r, g, b) {\n this.ctx.fillStyle = this.current.fillColor = Util.makeHexColor(r, g, b);\n this.current.patternFill = false;\n }\n setFillTransparent() {\n this.ctx.fillStyle = this.current.fillColor = \"transparent\";\n this.current.patternFill = false;\n }\n _getPattern(objId, matrix = null) {\n let pattern;\n if (this.cachedPatterns.has(objId)) {\n pattern = this.cachedPatterns.get(objId);\n } else {\n pattern = getShadingPattern(this.getObject(objId));\n this.cachedPatterns.set(objId, pattern);\n }\n if (matrix) {\n pattern.matrix = matrix;\n }\n return pattern;\n }\n shadingFill(objId) {\n if (!this.contentVisible) {\n return;\n }\n const ctx = this.ctx;\n this.save();\n const pattern = this._getPattern(objId);\n ctx.fillStyle = pattern.getPattern(ctx, this, getCurrentTransformInverse(ctx), PathType.SHADING);\n const inv = getCurrentTransformInverse(ctx);\n if (inv) {\n const {\n width,\n height\n } = ctx.canvas;\n const [x0, y0, x1, y1] = Util.getAxialAlignedBoundingBox([0, 0, width, height], inv);\n this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);\n } else {\n this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);\n }\n this.compose(this.current.getClippedPathBoundingBox());\n this.restore();\n }\n beginInlineImage() {\n unreachable(\"Should not call beginInlineImage\");\n }\n beginImageData() {\n unreachable(\"Should not call beginImageData\");\n }\n paintFormXObjectBegin(matrix, bbox) {\n if (!this.contentVisible) {\n return;\n }\n this.save();\n this.baseTransformStack.push(this.baseTransform);\n if (matrix) {\n this.transform(...matrix);\n }\n this.baseTransform = getCurrentTransform(this.ctx);\n if (bbox) {\n const width = bbox[2] - bbox[0];\n const height = bbox[3] - bbox[1];\n this.ctx.rect(bbox[0], bbox[1], width, height);\n this.current.updateRectMinMax(getCurrentTransform(this.ctx), bbox);\n this.clip();\n this.endPath();\n }\n }\n paintFormXObjectEnd() {\n if (!this.contentVisible) {\n return;\n }\n this.restore();\n this.baseTransform = this.baseTransformStack.pop();\n }\n beginGroup(group) {\n if (!this.contentVisible) {\n return;\n }\n this.save();\n if (this.inSMaskMode) {\n this.endSMaskMode();\n this.current.activeSMask = null;\n }\n const currentCtx = this.ctx;\n if (!group.isolated) {\n info(\"TODO: Support non-isolated groups.\");\n }\n if (group.knockout) {\n warn(\"Knockout groups not supported.\");\n }\n const currentTransform = getCurrentTransform(currentCtx);\n if (group.matrix) {\n currentCtx.transform(...group.matrix);\n }\n if (!group.bbox) {\n throw new Error(\"Bounding box is required.\");\n }\n let bounds = Util.getAxialAlignedBoundingBox(group.bbox, getCurrentTransform(currentCtx));\n const canvasBounds = [0, 0, currentCtx.canvas.width, currentCtx.canvas.height];\n bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];\n const offsetX = Math.floor(bounds[0]);\n const offsetY = Math.floor(bounds[1]);\n const drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);\n const drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);\n this.current.startNewPathAndClipBox([0, 0, drawnWidth, drawnHeight]);\n let cacheId = \"groupAt\" + this.groupLevel;\n if (group.smask) {\n cacheId += \"_smask_\" + this.smaskCounter++ % 2;\n }\n const scratchCanvas = this.cachedCanvases.getCanvas(cacheId, drawnWidth, drawnHeight);\n const groupCtx = scratchCanvas.context;\n groupCtx.translate(-offsetX, -offsetY);\n groupCtx.transform(...currentTransform);\n if (group.smask) {\n this.smaskStack.push({\n canvas: scratchCanvas.canvas,\n context: groupCtx,\n offsetX,\n offsetY,\n subtype: group.smask.subtype,\n backdrop: group.smask.backdrop,\n transferMap: group.smask.transferMap || null,\n startTransformInverse: null\n });\n } else {\n currentCtx.setTransform(1, 0, 0, 1, 0, 0);\n currentCtx.translate(offsetX, offsetY);\n currentCtx.save();\n }\n copyCtxState(currentCtx, groupCtx);\n this.ctx = groupCtx;\n this.setGState([[\"BM\", \"source-over\"], [\"ca\", 1], [\"CA\", 1]]);\n this.groupStack.push(currentCtx);\n this.groupLevel++;\n }\n endGroup(group) {\n if (!this.contentVisible) {\n return;\n }\n this.groupLevel--;\n const groupCtx = this.ctx;\n const ctx = this.groupStack.pop();\n this.ctx = ctx;\n this.ctx.imageSmoothingEnabled = false;\n if (group.smask) {\n this.tempSMask = this.smaskStack.pop();\n this.restore();\n } else {\n this.ctx.restore();\n const currentMtx = getCurrentTransform(this.ctx);\n this.restore();\n this.ctx.save();\n this.ctx.setTransform(...currentMtx);\n const dirtyBox = Util.getAxialAlignedBoundingBox([0, 0, groupCtx.canvas.width, groupCtx.canvas.height], currentMtx);\n this.ctx.drawImage(groupCtx.canvas, 0, 0);\n this.ctx.restore();\n this.compose(dirtyBox);\n }\n }\n beginAnnotation(id, rect, transform, matrix, hasOwnCanvas) {\n this.#restoreInitialState();\n resetCtxToDefault(this.ctx);\n this.ctx.save();\n this.save();\n if (this.baseTransform) {\n this.ctx.setTransform(...this.baseTransform);\n }\n if (rect) {\n const width = rect[2] - rect[0];\n const height = rect[3] - rect[1];\n if (hasOwnCanvas && this.annotationCanvasMap) {\n transform = transform.slice();\n transform[4] -= rect[0];\n transform[5] -= rect[1];\n rect = rect.slice();\n rect[0] = rect[1] = 0;\n rect[2] = width;\n rect[3] = height;\n const [scaleX, scaleY] = Util.singularValueDecompose2dScale(getCurrentTransform(this.ctx));\n const {\n viewportScale\n } = this;\n const canvasWidth = Math.ceil(width * this.outputScaleX * viewportScale);\n const canvasHeight = Math.ceil(height * this.outputScaleY * viewportScale);\n this.annotationCanvas = this.canvasFactory.create(canvasWidth, canvasHeight);\n const {\n canvas,\n context\n } = this.annotationCanvas;\n this.annotationCanvasMap.set(id, canvas);\n this.annotationCanvas.savedCtx = this.ctx;\n this.ctx = context;\n this.ctx.save();\n this.ctx.setTransform(scaleX, 0, 0, -scaleY, 0, height * scaleY);\n resetCtxToDefault(this.ctx);\n } else {\n resetCtxToDefault(this.ctx);\n this.endPath();\n this.ctx.rect(rect[0], rect[1], width, height);\n this.ctx.clip();\n this.ctx.beginPath();\n }\n }\n this.current = new CanvasExtraState(this.ctx.canvas.width, this.ctx.canvas.height);\n this.transform(...transform);\n this.transform(...matrix);\n }\n endAnnotation() {\n if (this.annotationCanvas) {\n this.ctx.restore();\n this.#drawFilter();\n this.ctx = this.annotationCanvas.savedCtx;\n delete this.annotationCanvas.savedCtx;\n delete this.annotationCanvas;\n }\n }\n paintImageMaskXObject(img) {\n if (!this.contentVisible) {\n return;\n }\n const count = img.count;\n img = this.getObject(img.data, img);\n img.count = count;\n const ctx = this.ctx;\n const glyph = this.processingType3;\n if (glyph) {\n if (glyph.compiled === undefined) {\n glyph.compiled = compileType3Glyph(img);\n }\n if (glyph.compiled) {\n glyph.compiled(ctx);\n return;\n }\n }\n const mask = this._createMaskCanvas(img);\n const maskCanvas = mask.canvas;\n ctx.save();\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n ctx.drawImage(maskCanvas, mask.offsetX, mask.offsetY);\n ctx.restore();\n this.compose();\n }\n paintImageMaskXObjectRepeat(img, scaleX, skewX = 0, skewY = 0, scaleY, positions) {\n if (!this.contentVisible) {\n return;\n }\n img = this.getObject(img.data, img);\n const ctx = this.ctx;\n ctx.save();\n const currentTransform = getCurrentTransform(ctx);\n ctx.transform(scaleX, skewX, skewY, scaleY, 0, 0);\n const mask = this._createMaskCanvas(img);\n ctx.setTransform(1, 0, 0, 1, mask.offsetX - currentTransform[4], mask.offsetY - currentTransform[5]);\n for (let i = 0, ii = positions.length; i < ii; i += 2) {\n const trans = Util.transform(currentTransform, [scaleX, skewX, skewY, scaleY, positions[i], positions[i + 1]]);\n const [x, y] = Util.applyTransform([0, 0], trans);\n ctx.drawImage(mask.canvas, x, y);\n }\n ctx.restore();\n this.compose();\n }\n paintImageMaskXObjectGroup(images) {\n if (!this.contentVisible) {\n return;\n }\n const ctx = this.ctx;\n const fillColor = this.current.fillColor;\n const isPatternFill = this.current.patternFill;\n for (const image of images) {\n const {\n data,\n width,\n height,\n transform\n } = image;\n const maskCanvas = this.cachedCanvases.getCanvas(\"maskCanvas\", width, height);\n const maskCtx = maskCanvas.context;\n maskCtx.save();\n const img = this.getObject(data, image);\n putBinaryImageMask(maskCtx, img);\n maskCtx.globalCompositeOperation = \"source-in\";\n maskCtx.fillStyle = isPatternFill ? fillColor.getPattern(maskCtx, this, getCurrentTransformInverse(ctx), PathType.FILL) : fillColor;\n maskCtx.fillRect(0, 0, width, height);\n maskCtx.restore();\n ctx.save();\n ctx.transform(...transform);\n ctx.scale(1, -1);\n drawImageAtIntegerCoords(ctx, maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);\n ctx.restore();\n }\n this.compose();\n }\n paintImageXObject(objId) {\n if (!this.contentVisible) {\n return;\n }\n const imgData = this.getObject(objId);\n if (!imgData) {\n warn(\"Dependent image isn't ready yet\");\n return;\n }\n this.paintInlineImageXObject(imgData);\n }\n paintImageXObjectRepeat(objId, scaleX, scaleY, positions) {\n if (!this.contentVisible) {\n return;\n }\n const imgData = this.getObject(objId);\n if (!imgData) {\n warn(\"Dependent image isn't ready yet\");\n return;\n }\n const width = imgData.width;\n const height = imgData.height;\n const map = [];\n for (let i = 0, ii = positions.length; i < ii; i += 2) {\n map.push({\n transform: [scaleX, 0, 0, scaleY, positions[i], positions[i + 1]],\n x: 0,\n y: 0,\n w: width,\n h: height\n });\n }\n this.paintInlineImageXObjectGroup(imgData, map);\n }\n applyTransferMapsToCanvas(ctx) {\n if (this.current.transferMaps !== \"none\") {\n ctx.filter = this.current.transferMaps;\n ctx.drawImage(ctx.canvas, 0, 0);\n ctx.filter = \"none\";\n }\n return ctx.canvas;\n }\n applyTransferMapsToBitmap(imgData) {\n if (this.current.transferMaps === \"none\") {\n return imgData.bitmap;\n }\n const {\n bitmap,\n width,\n height\n } = imgData;\n const tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", width, height);\n const tmpCtx = tmpCanvas.context;\n tmpCtx.filter = this.current.transferMaps;\n tmpCtx.drawImage(bitmap, 0, 0);\n tmpCtx.filter = \"none\";\n return tmpCanvas.canvas;\n }\n paintInlineImageXObject(imgData) {\n if (!this.contentVisible) {\n return;\n }\n const width = imgData.width;\n const height = imgData.height;\n const ctx = this.ctx;\n this.save();\n if (!isNodeJS) {\n const {\n filter\n } = ctx;\n if (filter !== \"none\" && filter !== \"\") {\n ctx.filter = \"none\";\n }\n }\n ctx.scale(1 / width, -1 / height);\n let imgToPaint;\n if (imgData.bitmap) {\n imgToPaint = this.applyTransferMapsToBitmap(imgData);\n } else if (typeof HTMLElement === \"function\" && imgData instanceof HTMLElement || !imgData.data) {\n imgToPaint = imgData;\n } else {\n const tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", width, height);\n const tmpCtx = tmpCanvas.context;\n putBinaryImageData(tmpCtx, imgData);\n imgToPaint = this.applyTransferMapsToCanvas(tmpCtx);\n }\n const scaled = this._scaleImage(imgToPaint, getCurrentTransformInverse(ctx));\n ctx.imageSmoothingEnabled = getImageSmoothingEnabled(getCurrentTransform(ctx), imgData.interpolate);\n drawImageAtIntegerCoords(ctx, scaled.img, 0, 0, scaled.paintWidth, scaled.paintHeight, 0, -height, width, height);\n this.compose();\n this.restore();\n }\n paintInlineImageXObjectGroup(imgData, map) {\n if (!this.contentVisible) {\n return;\n }\n const ctx = this.ctx;\n let imgToPaint;\n if (imgData.bitmap) {\n imgToPaint = imgData.bitmap;\n } else {\n const w = imgData.width;\n const h = imgData.height;\n const tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", w, h);\n const tmpCtx = tmpCanvas.context;\n putBinaryImageData(tmpCtx, imgData);\n imgToPaint = this.applyTransferMapsToCanvas(tmpCtx);\n }\n for (const entry of map) {\n ctx.save();\n ctx.transform(...entry.transform);\n ctx.scale(1, -1);\n drawImageAtIntegerCoords(ctx, imgToPaint, entry.x, entry.y, entry.w, entry.h, 0, -1, 1, 1);\n ctx.restore();\n }\n this.compose();\n }\n paintSolidColorImageMask() {\n if (!this.contentVisible) {\n return;\n }\n this.ctx.fillRect(0, 0, 1, 1);\n this.compose();\n }\n markPoint(tag) {}\n markPointProps(tag, properties) {}\n beginMarkedContent(tag) {\n this.markedContentStack.push({\n visible: true\n });\n }\n beginMarkedContentProps(tag, properties) {\n if (tag === \"OC\") {\n this.markedContentStack.push({\n visible: this.optionalContentConfig.isVisible(properties)\n });\n } else {\n this.markedContentStack.push({\n visible: true\n });\n }\n this.contentVisible = this.isContentVisible();\n }\n endMarkedContent() {\n this.markedContentStack.pop();\n this.contentVisible = this.isContentVisible();\n }\n beginCompat() {}\n endCompat() {}\n consumePath(clipBox) {\n const isEmpty = this.current.isEmptyClip();\n if (this.pendingClip) {\n this.current.updateClipFromPath();\n }\n if (!this.pendingClip) {\n this.compose(clipBox);\n }\n const ctx = this.ctx;\n if (this.pendingClip) {\n if (!isEmpty) {\n if (this.pendingClip === EO_CLIP) {\n ctx.clip(\"evenodd\");\n } else {\n ctx.clip();\n }\n }\n this.pendingClip = null;\n }\n this.current.startNewPathAndClipBox(this.current.clipBox);\n ctx.beginPath();\n }\n getSinglePixelWidth() {\n if (!this._cachedGetSinglePixelWidth) {\n const m = getCurrentTransform(this.ctx);\n if (m[1] === 0 && m[2] === 0) {\n this._cachedGetSinglePixelWidth = 1 / Math.min(Math.abs(m[0]), Math.abs(m[3]));\n } else {\n const absDet = Math.abs(m[0] * m[3] - m[2] * m[1]);\n const normX = Math.hypot(m[0], m[2]);\n const normY = Math.hypot(m[1], m[3]);\n this._cachedGetSinglePixelWidth = Math.max(normX, normY) / absDet;\n }\n }\n return this._cachedGetSinglePixelWidth;\n }\n getScaleForStroking() {\n if (this._cachedScaleForStroking[0] === -1) {\n const {\n lineWidth\n } = this.current;\n const {\n a,\n b,\n c,\n d\n } = this.ctx.getTransform();\n let scaleX, scaleY;\n if (b === 0 && c === 0) {\n const normX = Math.abs(a);\n const normY = Math.abs(d);\n if (normX === normY) {\n if (lineWidth === 0) {\n scaleX = scaleY = 1 / normX;\n } else {\n const scaledLineWidth = normX * lineWidth;\n scaleX = scaleY = scaledLineWidth < 1 ? 1 / scaledLineWidth : 1;\n }\n } else if (lineWidth === 0) {\n scaleX = 1 / normX;\n scaleY = 1 / normY;\n } else {\n const scaledXLineWidth = normX * lineWidth;\n const scaledYLineWidth = normY * lineWidth;\n scaleX = scaledXLineWidth < 1 ? 1 / scaledXLineWidth : 1;\n scaleY = scaledYLineWidth < 1 ? 1 / scaledYLineWidth : 1;\n }\n } else {\n const absDet = Math.abs(a * d - b * c);\n const normX = Math.hypot(a, b);\n const normY = Math.hypot(c, d);\n if (lineWidth === 0) {\n scaleX = normY / absDet;\n scaleY = normX / absDet;\n } else {\n const baseArea = lineWidth * absDet;\n scaleX = normY > baseArea ? normY / baseArea : 1;\n scaleY = normX > baseArea ? normX / baseArea : 1;\n }\n }\n this._cachedScaleForStroking[0] = scaleX;\n this._cachedScaleForStroking[1] = scaleY;\n }\n return this._cachedScaleForStroking;\n }\n rescaleAndStroke(saveRestore) {\n const {\n ctx\n } = this;\n const {\n lineWidth\n } = this.current;\n const [scaleX, scaleY] = this.getScaleForStroking();\n ctx.lineWidth = lineWidth || 1;\n if (scaleX === 1 && scaleY === 1) {\n ctx.stroke();\n return;\n }\n const dashes = ctx.getLineDash();\n if (saveRestore) {\n ctx.save();\n }\n ctx.scale(scaleX, scaleY);\n if (dashes.length > 0) {\n const scale = Math.max(scaleX, scaleY);\n ctx.setLineDash(dashes.map(x => x / scale));\n ctx.lineDashOffset /= scale;\n }\n ctx.stroke();\n if (saveRestore) {\n ctx.restore();\n }\n }\n isContentVisible() {\n for (let i = this.markedContentStack.length - 1; i >= 0; i--) {\n if (!this.markedContentStack[i].visible) {\n return false;\n }\n }\n return true;\n }\n}\nfor (const op in OPS) {\n if (CanvasGraphics.prototype[op] !== undefined) {\n CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];\n }\n}\n\n;// ./src/display/worker_options.js\nclass GlobalWorkerOptions {\n static #port = null;\n static #src = \"\";\n static get workerPort() {\n return this.#port;\n }\n static set workerPort(val) {\n if (!(typeof Worker !== \"undefined\" && val instanceof Worker) && val !== null) {\n throw new Error(\"Invalid `workerPort` type.\");\n }\n this.#port = val;\n }\n static get workerSrc() {\n return this.#src;\n }\n static set workerSrc(val) {\n if (typeof val !== \"string\") {\n throw new Error(\"Invalid `workerSrc` type.\");\n }\n this.#src = val;\n }\n}\n\n;// ./src/display/metadata.js\n\nclass Metadata {\n #metadataMap;\n #data;\n constructor({\n parsedData,\n rawData\n }) {\n this.#metadataMap = parsedData;\n this.#data = rawData;\n }\n getRaw() {\n return this.#data;\n }\n get(name) {\n return this.#metadataMap.get(name) ?? null;\n }\n getAll() {\n return objectFromMap(this.#metadataMap);\n }\n has(name) {\n return this.#metadataMap.has(name);\n }\n}\n\n;// ./src/display/optional_content_config.js\n\n\nconst INTERNAL = Symbol(\"INTERNAL\");\nclass OptionalContentGroup {\n #isDisplay = false;\n #isPrint = false;\n #userSet = false;\n #visible = true;\n constructor(renderingIntent, {\n name,\n intent,\n usage,\n rbGroups\n }) {\n this.#isDisplay = !!(renderingIntent & RenderingIntentFlag.DISPLAY);\n this.#isPrint = !!(renderingIntent & RenderingIntentFlag.PRINT);\n this.name = name;\n this.intent = intent;\n this.usage = usage;\n this.rbGroups = rbGroups;\n }\n get visible() {\n if (this.#userSet) {\n return this.#visible;\n }\n if (!this.#visible) {\n return false;\n }\n const {\n print,\n view\n } = this.usage;\n if (this.#isDisplay) {\n return view?.viewState !== \"OFF\";\n } else if (this.#isPrint) {\n return print?.printState !== \"OFF\";\n }\n return true;\n }\n _setVisible(internal, visible, userSet = false) {\n if (internal !== INTERNAL) {\n unreachable(\"Internal method `_setVisible` called.\");\n }\n this.#userSet = userSet;\n this.#visible = visible;\n }\n}\nclass OptionalContentConfig {\n #cachedGetHash = null;\n #groups = new Map();\n #initialHash = null;\n #order = null;\n constructor(data, renderingIntent = RenderingIntentFlag.DISPLAY) {\n this.renderingIntent = renderingIntent;\n this.name = null;\n this.creator = null;\n if (data === null) {\n return;\n }\n this.name = data.name;\n this.creator = data.creator;\n this.#order = data.order;\n for (const group of data.groups) {\n this.#groups.set(group.id, new OptionalContentGroup(renderingIntent, group));\n }\n if (data.baseState === \"OFF\") {\n for (const group of this.#groups.values()) {\n group._setVisible(INTERNAL, false);\n }\n }\n for (const on of data.on) {\n this.#groups.get(on)._setVisible(INTERNAL, true);\n }\n for (const off of data.off) {\n this.#groups.get(off)._setVisible(INTERNAL, false);\n }\n this.#initialHash = this.getHash();\n }\n #evaluateVisibilityExpression(array) {\n const length = array.length;\n if (length < 2) {\n return true;\n }\n const operator = array[0];\n for (let i = 1; i < length; i++) {\n const element = array[i];\n let state;\n if (Array.isArray(element)) {\n state = this.#evaluateVisibilityExpression(element);\n } else if (this.#groups.has(element)) {\n state = this.#groups.get(element).visible;\n } else {\n warn(`Optional content group not found: ${element}`);\n return true;\n }\n switch (operator) {\n case \"And\":\n if (!state) {\n return false;\n }\n break;\n case \"Or\":\n if (state) {\n return true;\n }\n break;\n case \"Not\":\n return !state;\n default:\n return true;\n }\n }\n return operator === \"And\";\n }\n isVisible(group) {\n if (this.#groups.size === 0) {\n return true;\n }\n if (!group) {\n info(\"Optional content group not defined.\");\n return true;\n }\n if (group.type === \"OCG\") {\n if (!this.#groups.has(group.id)) {\n warn(`Optional content group not found: ${group.id}`);\n return true;\n }\n return this.#groups.get(group.id).visible;\n } else if (group.type === \"OCMD\") {\n if (group.expression) {\n return this.#evaluateVisibilityExpression(group.expression);\n }\n if (!group.policy || group.policy === \"AnyOn\") {\n for (const id of group.ids) {\n if (!this.#groups.has(id)) {\n warn(`Optional content group not found: ${id}`);\n return true;\n }\n if (this.#groups.get(id).visible) {\n return true;\n }\n }\n return false;\n } else if (group.policy === \"AllOn\") {\n for (const id of group.ids) {\n if (!this.#groups.has(id)) {\n warn(`Optional content group not found: ${id}`);\n return true;\n }\n if (!this.#groups.get(id).visible) {\n return false;\n }\n }\n return true;\n } else if (group.policy === \"AnyOff\") {\n for (const id of group.ids) {\n if (!this.#groups.has(id)) {\n warn(`Optional content group not found: ${id}`);\n return true;\n }\n if (!this.#groups.get(id).visible) {\n return true;\n }\n }\n return false;\n } else if (group.policy === \"AllOff\") {\n for (const id of group.ids) {\n if (!this.#groups.has(id)) {\n warn(`Optional content group not found: ${id}`);\n return true;\n }\n if (this.#groups.get(id).visible) {\n return false;\n }\n }\n return true;\n }\n warn(`Unknown optional content policy ${group.policy}.`);\n return true;\n }\n warn(`Unknown group type ${group.type}.`);\n return true;\n }\n setVisibility(id, visible = true, preserveRB = true) {\n const group = this.#groups.get(id);\n if (!group) {\n warn(`Optional content group not found: ${id}`);\n return;\n }\n if (preserveRB && visible && group.rbGroups.length) {\n for (const rbGroup of group.rbGroups) {\n for (const otherId of rbGroup) {\n if (otherId !== id) {\n this.#groups.get(otherId)?._setVisible(INTERNAL, false, true);\n }\n }\n }\n }\n group._setVisible(INTERNAL, !!visible, true);\n this.#cachedGetHash = null;\n }\n setOCGState({\n state,\n preserveRB\n }) {\n let operator;\n for (const elem of state) {\n switch (elem) {\n case \"ON\":\n case \"OFF\":\n case \"Toggle\":\n operator = elem;\n continue;\n }\n const group = this.#groups.get(elem);\n if (!group) {\n continue;\n }\n switch (operator) {\n case \"ON\":\n this.setVisibility(elem, true, preserveRB);\n break;\n case \"OFF\":\n this.setVisibility(elem, false, preserveRB);\n break;\n case \"Toggle\":\n this.setVisibility(elem, !group.visible, preserveRB);\n break;\n }\n }\n this.#cachedGetHash = null;\n }\n get hasInitialVisibility() {\n return this.#initialHash === null || this.getHash() === this.#initialHash;\n }\n getOrder() {\n if (!this.#groups.size) {\n return null;\n }\n if (this.#order) {\n return this.#order.slice();\n }\n return [...this.#groups.keys()];\n }\n getGroups() {\n return this.#groups.size > 0 ? objectFromMap(this.#groups) : null;\n }\n getGroup(id) {\n return this.#groups.get(id) || null;\n }\n getHash() {\n if (this.#cachedGetHash !== null) {\n return this.#cachedGetHash;\n }\n const hash = new MurmurHash3_64();\n for (const [id, group] of this.#groups) {\n hash.update(`${id}:${group.visible}`);\n }\n return this.#cachedGetHash = hash.hexdigest();\n }\n}\n\n;// ./src/display/transport_stream.js\n\n\nclass PDFDataTransportStream {\n constructor(pdfDataRangeTransport, {\n disableRange = false,\n disableStream = false\n }) {\n assert(pdfDataRangeTransport, 'PDFDataTransportStream - missing required \"pdfDataRangeTransport\" argument.');\n const {\n length,\n initialData,\n progressiveDone,\n contentDispositionFilename\n } = pdfDataRangeTransport;\n this._queuedChunks = [];\n this._progressiveDone = progressiveDone;\n this._contentDispositionFilename = contentDispositionFilename;\n if (initialData?.length > 0) {\n const buffer = initialData instanceof Uint8Array && initialData.byteLength === initialData.buffer.byteLength ? initialData.buffer : new Uint8Array(initialData).buffer;\n this._queuedChunks.push(buffer);\n }\n this._pdfDataRangeTransport = pdfDataRangeTransport;\n this._isStreamingSupported = !disableStream;\n this._isRangeSupported = !disableRange;\n this._contentLength = length;\n this._fullRequestReader = null;\n this._rangeReaders = [];\n pdfDataRangeTransport.addRangeListener((begin, chunk) => {\n this._onReceiveData({\n begin,\n chunk\n });\n });\n pdfDataRangeTransport.addProgressListener((loaded, total) => {\n this._onProgress({\n loaded,\n total\n });\n });\n pdfDataRangeTransport.addProgressiveReadListener(chunk => {\n this._onReceiveData({\n chunk\n });\n });\n pdfDataRangeTransport.addProgressiveDoneListener(() => {\n this._onProgressiveDone();\n });\n pdfDataRangeTransport.transportReady();\n }\n _onReceiveData({\n begin,\n chunk\n }) {\n const buffer = chunk instanceof Uint8Array && chunk.byteLength === chunk.buffer.byteLength ? chunk.buffer : new Uint8Array(chunk).buffer;\n if (begin === undefined) {\n if (this._fullRequestReader) {\n this._fullRequestReader._enqueue(buffer);\n } else {\n this._queuedChunks.push(buffer);\n }\n } else {\n const found = this._rangeReaders.some(function (rangeReader) {\n if (rangeReader._begin !== begin) {\n return false;\n }\n rangeReader._enqueue(buffer);\n return true;\n });\n assert(found, \"_onReceiveData - no `PDFDataTransportStreamRangeReader` instance found.\");\n }\n }\n get _progressiveDataLength() {\n return this._fullRequestReader?._loaded ?? 0;\n }\n _onProgress(evt) {\n if (evt.total === undefined) {\n this._rangeReaders[0]?.onProgress?.({\n loaded: evt.loaded\n });\n } else {\n this._fullRequestReader?.onProgress?.({\n loaded: evt.loaded,\n total: evt.total\n });\n }\n }\n _onProgressiveDone() {\n this._fullRequestReader?.progressiveDone();\n this._progressiveDone = true;\n }\n _removeRangeReader(reader) {\n const i = this._rangeReaders.indexOf(reader);\n if (i >= 0) {\n this._rangeReaders.splice(i, 1);\n }\n }\n getFullReader() {\n assert(!this._fullRequestReader, \"PDFDataTransportStream.getFullReader can only be called once.\");\n const queuedChunks = this._queuedChunks;\n this._queuedChunks = null;\n return new PDFDataTransportStreamReader(this, queuedChunks, this._progressiveDone, this._contentDispositionFilename);\n }\n getRangeReader(begin, end) {\n if (end <= this._progressiveDataLength) {\n return null;\n }\n const reader = new PDFDataTransportStreamRangeReader(this, begin, end);\n this._pdfDataRangeTransport.requestDataRange(begin, end);\n this._rangeReaders.push(reader);\n return reader;\n }\n cancelAllRequests(reason) {\n this._fullRequestReader?.cancel(reason);\n for (const reader of this._rangeReaders.slice(0)) {\n reader.cancel(reason);\n }\n this._pdfDataRangeTransport.abort();\n }\n}\nclass PDFDataTransportStreamReader {\n constructor(stream, queuedChunks, progressiveDone = false, contentDispositionFilename = null) {\n this._stream = stream;\n this._done = progressiveDone || false;\n this._filename = isPdfFile(contentDispositionFilename) ? contentDispositionFilename : null;\n this._queuedChunks = queuedChunks || [];\n this._loaded = 0;\n for (const chunk of this._queuedChunks) {\n this._loaded += chunk.byteLength;\n }\n this._requests = [];\n this._headersReady = Promise.resolve();\n stream._fullRequestReader = this;\n this.onProgress = null;\n }\n _enqueue(chunk) {\n if (this._done) {\n return;\n }\n if (this._requests.length > 0) {\n const requestCapability = this._requests.shift();\n requestCapability.resolve({\n value: chunk,\n done: false\n });\n } else {\n this._queuedChunks.push(chunk);\n }\n this._loaded += chunk.byteLength;\n }\n get headersReady() {\n return this._headersReady;\n }\n get filename() {\n return this._filename;\n }\n get isRangeSupported() {\n return this._stream._isRangeSupported;\n }\n get isStreamingSupported() {\n return this._stream._isStreamingSupported;\n }\n get contentLength() {\n return this._stream._contentLength;\n }\n async read() {\n if (this._queuedChunks.length > 0) {\n const chunk = this._queuedChunks.shift();\n return {\n value: chunk,\n done: false\n };\n }\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n const requestCapability = Promise.withResolvers();\n this._requests.push(requestCapability);\n return requestCapability.promise;\n }\n cancel(reason) {\n this._done = true;\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n }\n progressiveDone() {\n if (this._done) {\n return;\n }\n this._done = true;\n }\n}\nclass PDFDataTransportStreamRangeReader {\n constructor(stream, begin, end) {\n this._stream = stream;\n this._begin = begin;\n this._end = end;\n this._queuedChunk = null;\n this._requests = [];\n this._done = false;\n this.onProgress = null;\n }\n _enqueue(chunk) {\n if (this._done) {\n return;\n }\n if (this._requests.length === 0) {\n this._queuedChunk = chunk;\n } else {\n const requestsCapability = this._requests.shift();\n requestsCapability.resolve({\n value: chunk,\n done: false\n });\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n }\n this._done = true;\n this._stream._removeRangeReader(this);\n }\n get isStreamingSupported() {\n return false;\n }\n async read() {\n if (this._queuedChunk) {\n const chunk = this._queuedChunk;\n this._queuedChunk = null;\n return {\n value: chunk,\n done: false\n };\n }\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n const requestCapability = Promise.withResolvers();\n this._requests.push(requestCapability);\n return requestCapability.promise;\n }\n cancel(reason) {\n this._done = true;\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n this._stream._removeRangeReader(this);\n }\n}\n\n;// ./src/display/content_disposition.js\n\nfunction getFilenameFromContentDispositionHeader(contentDisposition) {\n let needsEncodingFixup = true;\n let tmp = toParamRegExp(\"filename\\\\*\", \"i\").exec(contentDisposition);\n if (tmp) {\n tmp = tmp[1];\n let filename = rfc2616unquote(tmp);\n filename = unescape(filename);\n filename = rfc5987decode(filename);\n filename = rfc2047decode(filename);\n return fixupEncoding(filename);\n }\n tmp = rfc2231getparam(contentDisposition);\n if (tmp) {\n const filename = rfc2047decode(tmp);\n return fixupEncoding(filename);\n }\n tmp = toParamRegExp(\"filename\", \"i\").exec(contentDisposition);\n if (tmp) {\n tmp = tmp[1];\n let filename = rfc2616unquote(tmp);\n filename = rfc2047decode(filename);\n return fixupEncoding(filename);\n }\n function toParamRegExp(attributePattern, flags) {\n return new RegExp(\"(?:^|;)\\\\s*\" + attributePattern + \"\\\\s*=\\\\s*\" + \"(\" + '[^\";\\\\s][^;\\\\s]*' + \"|\" + '\"(?:[^\"\\\\\\\\]|\\\\\\\\\"?)+\"?' + \")\", flags);\n }\n function textdecode(encoding, value) {\n if (encoding) {\n if (!/^[\\x00-\\xFF]+$/.test(value)) {\n return value;\n }\n try {\n const decoder = new TextDecoder(encoding, {\n fatal: true\n });\n const buffer = stringToBytes(value);\n value = decoder.decode(buffer);\n needsEncodingFixup = false;\n } catch {}\n }\n return value;\n }\n function fixupEncoding(value) {\n if (needsEncodingFixup && /[\\x80-\\xff]/.test(value)) {\n value = textdecode(\"utf-8\", value);\n if (needsEncodingFixup) {\n value = textdecode(\"iso-8859-1\", value);\n }\n }\n return value;\n }\n function rfc2231getparam(contentDispositionStr) {\n const matches = [];\n let match;\n const iter = toParamRegExp(\"filename\\\\*((?!0\\\\d)\\\\d+)(\\\\*?)\", \"ig\");\n while ((match = iter.exec(contentDispositionStr)) !== null) {\n let [, n, quot, part] = match;\n n = parseInt(n, 10);\n if (n in matches) {\n if (n === 0) {\n break;\n }\n continue;\n }\n matches[n] = [quot, part];\n }\n const parts = [];\n for (let n = 0; n < matches.length; ++n) {\n if (!(n in matches)) {\n break;\n }\n let [quot, part] = matches[n];\n part = rfc2616unquote(part);\n if (quot) {\n part = unescape(part);\n if (n === 0) {\n part = rfc5987decode(part);\n }\n }\n parts.push(part);\n }\n return parts.join(\"\");\n }\n function rfc2616unquote(value) {\n if (value.startsWith('\"')) {\n const parts = value.slice(1).split('\\\\\"');\n for (let i = 0; i < parts.length; ++i) {\n const quotindex = parts[i].indexOf('\"');\n if (quotindex !== -1) {\n parts[i] = parts[i].slice(0, quotindex);\n parts.length = i + 1;\n }\n parts[i] = parts[i].replaceAll(/\\\\(.)/g, \"$1\");\n }\n value = parts.join('\"');\n }\n return value;\n }\n function rfc5987decode(extvalue) {\n const encodingend = extvalue.indexOf(\"'\");\n if (encodingend === -1) {\n return extvalue;\n }\n const encoding = extvalue.slice(0, encodingend);\n const langvalue = extvalue.slice(encodingend + 1);\n const value = langvalue.replace(/^[^']*'/, \"\");\n return textdecode(encoding, value);\n }\n function rfc2047decode(value) {\n if (!value.startsWith(\"=?\") || /[\\x00-\\x19\\x80-\\xff]/.test(value)) {\n return value;\n }\n return value.replaceAll(/=\\?([\\w-]*)\\?([QqBb])\\?((?:[^?]|\\?(?!=))*)\\?=/g, function (matches, charset, encoding, text) {\n if (encoding === \"q\" || encoding === \"Q\") {\n text = text.replaceAll(\"_\", \" \");\n text = text.replaceAll(/=([0-9a-fA-F]{2})/g, function (match, hex) {\n return String.fromCharCode(parseInt(hex, 16));\n });\n return textdecode(charset, text);\n }\n try {\n text = atob(text);\n } catch {}\n return textdecode(charset, text);\n });\n }\n return \"\";\n}\n\n;// ./src/display/network_utils.js\n\n\n\nfunction createHeaders(isHttp, httpHeaders) {\n const headers = new Headers();\n if (!isHttp || !httpHeaders || typeof httpHeaders !== \"object\") {\n return headers;\n }\n for (const key in httpHeaders) {\n const val = httpHeaders[key];\n if (val !== undefined) {\n headers.append(key, val);\n }\n }\n return headers;\n}\nfunction getResponseOrigin(url) {\n try {\n return new URL(url).origin;\n } catch {}\n return null;\n}\nfunction validateRangeRequestCapabilities({\n responseHeaders,\n isHttp,\n rangeChunkSize,\n disableRange\n}) {\n const returnValues = {\n allowRangeRequests: false,\n suggestedLength: undefined\n };\n const length = parseInt(responseHeaders.get(\"Content-Length\"), 10);\n if (!Number.isInteger(length)) {\n return returnValues;\n }\n returnValues.suggestedLength = length;\n if (length <= 2 * rangeChunkSize) {\n return returnValues;\n }\n if (disableRange || !isHttp) {\n return returnValues;\n }\n if (responseHeaders.get(\"Accept-Ranges\") !== \"bytes\") {\n return returnValues;\n }\n const contentEncoding = responseHeaders.get(\"Content-Encoding\") || \"identity\";\n if (contentEncoding !== \"identity\") {\n return returnValues;\n }\n returnValues.allowRangeRequests = true;\n return returnValues;\n}\nfunction extractFilenameFromHeader(responseHeaders) {\n const contentDisposition = responseHeaders.get(\"Content-Disposition\");\n if (contentDisposition) {\n let filename = getFilenameFromContentDispositionHeader(contentDisposition);\n if (filename.includes(\"%\")) {\n try {\n filename = decodeURIComponent(filename);\n } catch {}\n }\n if (isPdfFile(filename)) {\n return filename;\n }\n }\n return null;\n}\nfunction createResponseStatusError(status, url) {\n if (status === 404 || status === 0 && url.startsWith(\"file:\")) {\n return new MissingPDFException('Missing PDF \"' + url + '\".');\n }\n return new UnexpectedResponseException(`Unexpected server response (${status}) while retrieving PDF \"${url}\".`, status);\n}\nfunction validateResponseStatus(status) {\n return status === 200 || status === 206;\n}\n\n;// ./src/display/fetch_stream.js\n\n\nfunction createFetchOptions(headers, withCredentials, abortController) {\n return {\n method: \"GET\",\n headers,\n signal: abortController.signal,\n mode: \"cors\",\n credentials: withCredentials ? \"include\" : \"same-origin\",\n redirect: \"follow\"\n };\n}\nfunction getArrayBuffer(val) {\n if (val instanceof Uint8Array) {\n return val.buffer;\n }\n if (val instanceof ArrayBuffer) {\n return val;\n }\n warn(`getArrayBuffer - unexpected data format: ${val}`);\n return new Uint8Array(val).buffer;\n}\nclass PDFFetchStream {\n _responseOrigin = null;\n constructor(source) {\n this.source = source;\n this.isHttp = /^https?:/i.test(source.url);\n this.headers = createHeaders(this.isHttp, source.httpHeaders);\n this._fullRequestReader = null;\n this._rangeRequestReaders = [];\n }\n get _progressiveDataLength() {\n return this._fullRequestReader?._loaded ?? 0;\n }\n getFullReader() {\n assert(!this._fullRequestReader, \"PDFFetchStream.getFullReader can only be called once.\");\n this._fullRequestReader = new PDFFetchStreamReader(this);\n return this._fullRequestReader;\n }\n getRangeReader(begin, end) {\n if (end <= this._progressiveDataLength) {\n return null;\n }\n const reader = new PDFFetchStreamRangeReader(this, begin, end);\n this._rangeRequestReaders.push(reader);\n return reader;\n }\n cancelAllRequests(reason) {\n this._fullRequestReader?.cancel(reason);\n for (const reader of this._rangeRequestReaders.slice(0)) {\n reader.cancel(reason);\n }\n }\n}\nclass PDFFetchStreamReader {\n constructor(stream) {\n this._stream = stream;\n this._reader = null;\n this._loaded = 0;\n this._filename = null;\n const source = stream.source;\n this._withCredentials = source.withCredentials || false;\n this._contentLength = source.length;\n this._headersCapability = Promise.withResolvers();\n this._disableRange = source.disableRange || false;\n this._rangeChunkSize = source.rangeChunkSize;\n if (!this._rangeChunkSize && !this._disableRange) {\n this._disableRange = true;\n }\n this._abortController = new AbortController();\n this._isStreamingSupported = !source.disableStream;\n this._isRangeSupported = !source.disableRange;\n const headers = new Headers(stream.headers);\n const url = source.url;\n fetch(url, createFetchOptions(headers, this._withCredentials, this._abortController)).then(response => {\n stream._responseOrigin = getResponseOrigin(response.url);\n if (!validateResponseStatus(response.status)) {\n throw createResponseStatusError(response.status, url);\n }\n this._reader = response.body.getReader();\n this._headersCapability.resolve();\n const responseHeaders = response.headers;\n const {\n allowRangeRequests,\n suggestedLength\n } = validateRangeRequestCapabilities({\n responseHeaders,\n isHttp: stream.isHttp,\n rangeChunkSize: this._rangeChunkSize,\n disableRange: this._disableRange\n });\n this._isRangeSupported = allowRangeRequests;\n this._contentLength = suggestedLength || this._contentLength;\n this._filename = extractFilenameFromHeader(responseHeaders);\n if (!this._isStreamingSupported && this._isRangeSupported) {\n this.cancel(new AbortException(\"Streaming is disabled.\"));\n }\n }).catch(this._headersCapability.reject);\n this.onProgress = null;\n }\n get headersReady() {\n return this._headersCapability.promise;\n }\n get filename() {\n return this._filename;\n }\n get contentLength() {\n return this._contentLength;\n }\n get isRangeSupported() {\n return this._isRangeSupported;\n }\n get isStreamingSupported() {\n return this._isStreamingSupported;\n }\n async read() {\n await this._headersCapability.promise;\n const {\n value,\n done\n } = await this._reader.read();\n if (done) {\n return {\n value,\n done\n };\n }\n this._loaded += value.byteLength;\n this.onProgress?.({\n loaded: this._loaded,\n total: this._contentLength\n });\n return {\n value: getArrayBuffer(value),\n done: false\n };\n }\n cancel(reason) {\n this._reader?.cancel(reason);\n this._abortController.abort();\n }\n}\nclass PDFFetchStreamRangeReader {\n constructor(stream, begin, end) {\n this._stream = stream;\n this._reader = null;\n this._loaded = 0;\n const source = stream.source;\n this._withCredentials = source.withCredentials || false;\n this._readCapability = Promise.withResolvers();\n this._isStreamingSupported = !source.disableStream;\n this._abortController = new AbortController();\n const headers = new Headers(stream.headers);\n headers.append(\"Range\", `bytes=${begin}-${end - 1}`);\n const url = source.url;\n fetch(url, createFetchOptions(headers, this._withCredentials, this._abortController)).then(response => {\n const responseOrigin = getResponseOrigin(response.url);\n if (responseOrigin !== stream._responseOrigin) {\n throw new Error(`Expected range response-origin \"${responseOrigin}\" to match \"${stream._responseOrigin}\".`);\n }\n if (!validateResponseStatus(response.status)) {\n throw createResponseStatusError(response.status, url);\n }\n this._readCapability.resolve();\n this._reader = response.body.getReader();\n }).catch(this._readCapability.reject);\n this.onProgress = null;\n }\n get isStreamingSupported() {\n return this._isStreamingSupported;\n }\n async read() {\n await this._readCapability.promise;\n const {\n value,\n done\n } = await this._reader.read();\n if (done) {\n return {\n value,\n done\n };\n }\n this._loaded += value.byteLength;\n this.onProgress?.({\n loaded: this._loaded\n });\n return {\n value: getArrayBuffer(value),\n done: false\n };\n }\n cancel(reason) {\n this._reader?.cancel(reason);\n this._abortController.abort();\n }\n}\n\n;// ./src/display/network.js\n\n\nconst OK_RESPONSE = 200;\nconst PARTIAL_CONTENT_RESPONSE = 206;\nfunction network_getArrayBuffer(xhr) {\n const data = xhr.response;\n if (typeof data !== \"string\") {\n return data;\n }\n return stringToBytes(data).buffer;\n}\nclass NetworkManager {\n _responseOrigin = null;\n constructor({\n url,\n httpHeaders,\n withCredentials\n }) {\n this.url = url;\n this.isHttp = /^https?:/i.test(url);\n this.headers = createHeaders(this.isHttp, httpHeaders);\n this.withCredentials = withCredentials || false;\n this.currXhrId = 0;\n this.pendingRequests = Object.create(null);\n }\n request(args) {\n const xhr = new XMLHttpRequest();\n const xhrId = this.currXhrId++;\n const pendingRequest = this.pendingRequests[xhrId] = {\n xhr\n };\n xhr.open(\"GET\", this.url);\n xhr.withCredentials = this.withCredentials;\n for (const [key, val] of this.headers) {\n xhr.setRequestHeader(key, val);\n }\n if (this.isHttp && \"begin\" in args && \"end\" in args) {\n xhr.setRequestHeader(\"Range\", `bytes=${args.begin}-${args.end - 1}`);\n pendingRequest.expectedStatus = PARTIAL_CONTENT_RESPONSE;\n } else {\n pendingRequest.expectedStatus = OK_RESPONSE;\n }\n xhr.responseType = \"arraybuffer\";\n assert(args.onError, \"Expected `onError` callback to be provided.\");\n xhr.onerror = () => {\n args.onError(xhr.status);\n };\n xhr.onreadystatechange = this.onStateChange.bind(this, xhrId);\n xhr.onprogress = this.onProgress.bind(this, xhrId);\n pendingRequest.onHeadersReceived = args.onHeadersReceived;\n pendingRequest.onDone = args.onDone;\n pendingRequest.onError = args.onError;\n pendingRequest.onProgress = args.onProgress;\n xhr.send(null);\n return xhrId;\n }\n onProgress(xhrId, evt) {\n const pendingRequest = this.pendingRequests[xhrId];\n if (!pendingRequest) {\n return;\n }\n pendingRequest.onProgress?.(evt);\n }\n onStateChange(xhrId, evt) {\n const pendingRequest = this.pendingRequests[xhrId];\n if (!pendingRequest) {\n return;\n }\n const xhr = pendingRequest.xhr;\n if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) {\n pendingRequest.onHeadersReceived();\n delete pendingRequest.onHeadersReceived;\n }\n if (xhr.readyState !== 4) {\n return;\n }\n if (!(xhrId in this.pendingRequests)) {\n return;\n }\n delete this.pendingRequests[xhrId];\n if (xhr.status === 0 && this.isHttp) {\n pendingRequest.onError(xhr.status);\n return;\n }\n const xhrStatus = xhr.status || OK_RESPONSE;\n const ok_response_on_range_request = xhrStatus === OK_RESPONSE && pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE;\n if (!ok_response_on_range_request && xhrStatus !== pendingRequest.expectedStatus) {\n pendingRequest.onError(xhr.status);\n return;\n }\n const chunk = network_getArrayBuffer(xhr);\n if (xhrStatus === PARTIAL_CONTENT_RESPONSE) {\n const rangeHeader = xhr.getResponseHeader(\"Content-Range\");\n const matches = /bytes (\\d+)-(\\d+)\\/(\\d+)/.exec(rangeHeader);\n if (matches) {\n pendingRequest.onDone({\n begin: parseInt(matches[1], 10),\n chunk\n });\n } else {\n warn(`Missing or invalid \"Content-Range\" header.`);\n pendingRequest.onError(0);\n }\n } else if (chunk) {\n pendingRequest.onDone({\n begin: 0,\n chunk\n });\n } else {\n pendingRequest.onError(xhr.status);\n }\n }\n getRequestXhr(xhrId) {\n return this.pendingRequests[xhrId].xhr;\n }\n isPendingRequest(xhrId) {\n return xhrId in this.pendingRequests;\n }\n abortRequest(xhrId) {\n const xhr = this.pendingRequests[xhrId].xhr;\n delete this.pendingRequests[xhrId];\n xhr.abort();\n }\n}\nclass PDFNetworkStream {\n constructor(source) {\n this._source = source;\n this._manager = new NetworkManager(source);\n this._rangeChunkSize = source.rangeChunkSize;\n this._fullRequestReader = null;\n this._rangeRequestReaders = [];\n }\n _onRangeRequestReaderClosed(reader) {\n const i = this._rangeRequestReaders.indexOf(reader);\n if (i >= 0) {\n this._rangeRequestReaders.splice(i, 1);\n }\n }\n getFullReader() {\n assert(!this._fullRequestReader, \"PDFNetworkStream.getFullReader can only be called once.\");\n this._fullRequestReader = new PDFNetworkStreamFullRequestReader(this._manager, this._source);\n return this._fullRequestReader;\n }\n getRangeReader(begin, end) {\n const reader = new PDFNetworkStreamRangeRequestReader(this._manager, begin, end);\n reader.onClosed = this._onRangeRequestReaderClosed.bind(this);\n this._rangeRequestReaders.push(reader);\n return reader;\n }\n cancelAllRequests(reason) {\n this._fullRequestReader?.cancel(reason);\n for (const reader of this._rangeRequestReaders.slice(0)) {\n reader.cancel(reason);\n }\n }\n}\nclass PDFNetworkStreamFullRequestReader {\n constructor(manager, source) {\n this._manager = manager;\n this._url = source.url;\n this._fullRequestId = manager.request({\n onHeadersReceived: this._onHeadersReceived.bind(this),\n onDone: this._onDone.bind(this),\n onError: this._onError.bind(this),\n onProgress: this._onProgress.bind(this)\n });\n this._headersCapability = Promise.withResolvers();\n this._disableRange = source.disableRange || false;\n this._contentLength = source.length;\n this._rangeChunkSize = source.rangeChunkSize;\n if (!this._rangeChunkSize && !this._disableRange) {\n this._disableRange = true;\n }\n this._isStreamingSupported = false;\n this._isRangeSupported = false;\n this._cachedChunks = [];\n this._requests = [];\n this._done = false;\n this._storedError = undefined;\n this._filename = null;\n this.onProgress = null;\n }\n _onHeadersReceived() {\n const fullRequestXhrId = this._fullRequestId;\n const fullRequestXhr = this._manager.getRequestXhr(fullRequestXhrId);\n this._manager._responseOrigin = getResponseOrigin(fullRequestXhr.responseURL);\n const rawResponseHeaders = fullRequestXhr.getAllResponseHeaders();\n const responseHeaders = new Headers(rawResponseHeaders ? rawResponseHeaders.trimStart().replace(/[^\\S ]+$/, \"\").split(/[\\r\\n]+/).map(x => {\n const [key, ...val] = x.split(\": \");\n return [key, val.join(\": \")];\n }) : []);\n const {\n allowRangeRequests,\n suggestedLength\n } = validateRangeRequestCapabilities({\n responseHeaders,\n isHttp: this._manager.isHttp,\n rangeChunkSize: this._rangeChunkSize,\n disableRange: this._disableRange\n });\n if (allowRangeRequests) {\n this._isRangeSupported = true;\n }\n this._contentLength = suggestedLength || this._contentLength;\n this._filename = extractFilenameFromHeader(responseHeaders);\n if (this._isRangeSupported) {\n this._manager.abortRequest(fullRequestXhrId);\n }\n this._headersCapability.resolve();\n }\n _onDone(data) {\n if (data) {\n if (this._requests.length > 0) {\n const requestCapability = this._requests.shift();\n requestCapability.resolve({\n value: data.chunk,\n done: false\n });\n } else {\n this._cachedChunks.push(data.chunk);\n }\n }\n this._done = true;\n if (this._cachedChunks.length > 0) {\n return;\n }\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n }\n _onError(status) {\n this._storedError = createResponseStatusError(status, this._url);\n this._headersCapability.reject(this._storedError);\n for (const requestCapability of this._requests) {\n requestCapability.reject(this._storedError);\n }\n this._requests.length = 0;\n this._cachedChunks.length = 0;\n }\n _onProgress(evt) {\n this.onProgress?.({\n loaded: evt.loaded,\n total: evt.lengthComputable ? evt.total : this._contentLength\n });\n }\n get filename() {\n return this._filename;\n }\n get isRangeSupported() {\n return this._isRangeSupported;\n }\n get isStreamingSupported() {\n return this._isStreamingSupported;\n }\n get contentLength() {\n return this._contentLength;\n }\n get headersReady() {\n return this._headersCapability.promise;\n }\n async read() {\n await this._headersCapability.promise;\n if (this._storedError) {\n throw this._storedError;\n }\n if (this._cachedChunks.length > 0) {\n const chunk = this._cachedChunks.shift();\n return {\n value: chunk,\n done: false\n };\n }\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n const requestCapability = Promise.withResolvers();\n this._requests.push(requestCapability);\n return requestCapability.promise;\n }\n cancel(reason) {\n this._done = true;\n this._headersCapability.reject(reason);\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n if (this._manager.isPendingRequest(this._fullRequestId)) {\n this._manager.abortRequest(this._fullRequestId);\n }\n this._fullRequestReader = null;\n }\n}\nclass PDFNetworkStreamRangeRequestReader {\n constructor(manager, begin, end) {\n this._manager = manager;\n this._url = manager.url;\n this._requestId = manager.request({\n begin,\n end,\n onHeadersReceived: this._onHeadersReceived.bind(this),\n onDone: this._onDone.bind(this),\n onError: this._onError.bind(this),\n onProgress: this._onProgress.bind(this)\n });\n this._requests = [];\n this._queuedChunk = null;\n this._done = false;\n this._storedError = undefined;\n this.onProgress = null;\n this.onClosed = null;\n }\n _onHeadersReceived() {\n const responseOrigin = getResponseOrigin(this._manager.getRequestXhr(this._requestId)?.responseURL);\n if (responseOrigin !== this._manager._responseOrigin) {\n this._storedError = new Error(`Expected range response-origin \"${responseOrigin}\" to match \"${this._manager._responseOrigin}\".`);\n this._onError(0);\n }\n }\n _close() {\n this.onClosed?.(this);\n }\n _onDone(data) {\n const chunk = data.chunk;\n if (this._requests.length > 0) {\n const requestCapability = this._requests.shift();\n requestCapability.resolve({\n value: chunk,\n done: false\n });\n } else {\n this._queuedChunk = chunk;\n }\n this._done = true;\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n this._close();\n }\n _onError(status) {\n this._storedError ??= createResponseStatusError(status, this._url);\n for (const requestCapability of this._requests) {\n requestCapability.reject(this._storedError);\n }\n this._requests.length = 0;\n this._queuedChunk = null;\n }\n _onProgress(evt) {\n if (!this.isStreamingSupported) {\n this.onProgress?.({\n loaded: evt.loaded\n });\n }\n }\n get isStreamingSupported() {\n return false;\n }\n async read() {\n if (this._storedError) {\n throw this._storedError;\n }\n if (this._queuedChunk !== null) {\n const chunk = this._queuedChunk;\n this._queuedChunk = null;\n return {\n value: chunk,\n done: false\n };\n }\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n const requestCapability = Promise.withResolvers();\n this._requests.push(requestCapability);\n return requestCapability.promise;\n }\n cancel(reason) {\n this._done = true;\n for (const requestCapability of this._requests) {\n requestCapability.resolve({\n value: undefined,\n done: true\n });\n }\n this._requests.length = 0;\n if (this._manager.isPendingRequest(this._requestId)) {\n this._manager.abortRequest(this._requestId);\n }\n this._close();\n }\n}\n\n;// ./src/display/node_stream.js\n\nconst urlRegex = /^[a-z][a-z0-9\\-+.]+:/i;\nfunction parseUrlOrPath(sourceUrl) {\n if (urlRegex.test(sourceUrl)) {\n return new URL(sourceUrl);\n }\n const url = process.getBuiltinModule(\"url\");\n return new URL(url.pathToFileURL(sourceUrl));\n}\nclass PDFNodeStream {\n constructor(source) {\n this.source = source;\n this.url = parseUrlOrPath(source.url);\n assert(this.url.protocol === \"file:\", \"PDFNodeStream only supports file:// URLs.\");\n this._fullRequestReader = null;\n this._rangeRequestReaders = [];\n }\n get _progressiveDataLength() {\n return this._fullRequestReader?._loaded ?? 0;\n }\n getFullReader() {\n assert(!this._fullRequestReader, \"PDFNodeStream.getFullReader can only be called once.\");\n this._fullRequestReader = new PDFNodeStreamFsFullReader(this);\n return this._fullRequestReader;\n }\n getRangeReader(start, end) {\n if (end <= this._progressiveDataLength) {\n return null;\n }\n const rangeReader = new PDFNodeStreamFsRangeReader(this, start, end);\n this._rangeRequestReaders.push(rangeReader);\n return rangeReader;\n }\n cancelAllRequests(reason) {\n this._fullRequestReader?.cancel(reason);\n for (const reader of this._rangeRequestReaders.slice(0)) {\n reader.cancel(reason);\n }\n }\n}\nclass PDFNodeStreamFsFullReader {\n constructor(stream) {\n this._url = stream.url;\n this._done = false;\n this._storedError = null;\n this.onProgress = null;\n const source = stream.source;\n this._contentLength = source.length;\n this._loaded = 0;\n this._filename = null;\n this._disableRange = source.disableRange || false;\n this._rangeChunkSize = source.rangeChunkSize;\n if (!this._rangeChunkSize && !this._disableRange) {\n this._disableRange = true;\n }\n this._isStreamingSupported = !source.disableStream;\n this._isRangeSupported = !source.disableRange;\n this._readableStream = null;\n this._readCapability = Promise.withResolvers();\n this._headersCapability = Promise.withResolvers();\n const fs = process.getBuiltinModule(\"fs\");\n fs.promises.lstat(this._url).then(stat => {\n this._contentLength = stat.size;\n this._setReadableStream(fs.createReadStream(this._url));\n this._headersCapability.resolve();\n }, error => {\n if (error.code === \"ENOENT\") {\n error = new MissingPDFException(`Missing PDF \"${this._url}\".`);\n }\n this._storedError = error;\n this._headersCapability.reject(error);\n });\n }\n get headersReady() {\n return this._headersCapability.promise;\n }\n get filename() {\n return this._filename;\n }\n get contentLength() {\n return this._contentLength;\n }\n get isRangeSupported() {\n return this._isRangeSupported;\n }\n get isStreamingSupported() {\n return this._isStreamingSupported;\n }\n async read() {\n await this._readCapability.promise;\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n if (this._storedError) {\n throw this._storedError;\n }\n const chunk = this._readableStream.read();\n if (chunk === null) {\n this._readCapability = Promise.withResolvers();\n return this.read();\n }\n this._loaded += chunk.length;\n this.onProgress?.({\n loaded: this._loaded,\n total: this._contentLength\n });\n const buffer = new Uint8Array(chunk).buffer;\n return {\n value: buffer,\n done: false\n };\n }\n cancel(reason) {\n if (!this._readableStream) {\n this._error(reason);\n return;\n }\n this._readableStream.destroy(reason);\n }\n _error(reason) {\n this._storedError = reason;\n this._readCapability.resolve();\n }\n _setReadableStream(readableStream) {\n this._readableStream = readableStream;\n readableStream.on(\"readable\", () => {\n this._readCapability.resolve();\n });\n readableStream.on(\"end\", () => {\n readableStream.destroy();\n this._done = true;\n this._readCapability.resolve();\n });\n readableStream.on(\"error\", reason => {\n this._error(reason);\n });\n if (!this._isStreamingSupported && this._isRangeSupported) {\n this._error(new AbortException(\"streaming is disabled\"));\n }\n if (this._storedError) {\n this._readableStream.destroy(this._storedError);\n }\n }\n}\nclass PDFNodeStreamFsRangeReader {\n constructor(stream, start, end) {\n this._url = stream.url;\n this._done = false;\n this._storedError = null;\n this.onProgress = null;\n this._loaded = 0;\n this._readableStream = null;\n this._readCapability = Promise.withResolvers();\n const source = stream.source;\n this._isStreamingSupported = !source.disableStream;\n const fs = process.getBuiltinModule(\"fs\");\n this._setReadableStream(fs.createReadStream(this._url, {\n start,\n end: end - 1\n }));\n }\n get isStreamingSupported() {\n return this._isStreamingSupported;\n }\n async read() {\n await this._readCapability.promise;\n if (this._done) {\n return {\n value: undefined,\n done: true\n };\n }\n if (this._storedError) {\n throw this._storedError;\n }\n const chunk = this._readableStream.read();\n if (chunk === null) {\n this._readCapability = Promise.withResolvers();\n return this.read();\n }\n this._loaded += chunk.length;\n this.onProgress?.({\n loaded: this._loaded\n });\n const buffer = new Uint8Array(chunk).buffer;\n return {\n value: buffer,\n done: false\n };\n }\n cancel(reason) {\n if (!this._readableStream) {\n this._error(reason);\n return;\n }\n this._readableStream.destroy(reason);\n }\n _error(reason) {\n this._storedError = reason;\n this._readCapability.resolve();\n }\n _setReadableStream(readableStream) {\n this._readableStream = readableStream;\n readableStream.on(\"readable\", () => {\n this._readCapability.resolve();\n });\n readableStream.on(\"end\", () => {\n readableStream.destroy();\n this._done = true;\n this._readCapability.resolve();\n });\n readableStream.on(\"error\", reason => {\n this._error(reason);\n });\n if (this._storedError) {\n this._readableStream.destroy(this._storedError);\n }\n }\n}\n\n;// ./src/display/text_layer.js\n\n\nconst MAX_TEXT_DIVS_TO_RENDER = 100000;\nconst DEFAULT_FONT_SIZE = 30;\nconst DEFAULT_FONT_ASCENT = 0.8;\nclass TextLayer {\n #capability = Promise.withResolvers();\n #container = null;\n #disableProcessItems = false;\n #fontInspectorEnabled = !!globalThis.FontInspector?.enabled;\n #lang = null;\n #layoutTextParams = null;\n #pageHeight = 0;\n #pageWidth = 0;\n #reader = null;\n #rootContainer = null;\n #rotation = 0;\n #scale = 0;\n #styleCache = Object.create(null);\n #textContentItemsStr = [];\n #textContentSource = null;\n #textDivs = [];\n #textDivProperties = new WeakMap();\n #transform = null;\n static #ascentCache = new Map();\n static #canvasContexts = new Map();\n static #canvasCtxFonts = new WeakMap();\n static #minFontSize = null;\n static #pendingTextLayers = new Set();\n constructor({\n textContentSource,\n container,\n viewport\n }) {\n if (textContentSource instanceof ReadableStream) {\n this.#textContentSource = textContentSource;\n } else if (typeof textContentSource === \"object\") {\n this.#textContentSource = new ReadableStream({\n start(controller) {\n controller.enqueue(textContentSource);\n controller.close();\n }\n });\n } else {\n throw new Error('No \"textContentSource\" parameter specified.');\n }\n this.#container = this.#rootContainer = container;\n this.#scale = viewport.scale * (globalThis.devicePixelRatio || 1);\n this.#rotation = viewport.rotation;\n this.#layoutTextParams = {\n div: null,\n properties: null,\n ctx: null\n };\n const {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n } = viewport.rawDims;\n this.#transform = [1, 0, 0, -1, -pageX, pageY + pageHeight];\n this.#pageWidth = pageWidth;\n this.#pageHeight = pageHeight;\n TextLayer.#ensureMinFontSizeComputed();\n setLayerDimensions(container, viewport);\n this.#capability.promise.finally(() => {\n TextLayer.#pendingTextLayers.delete(this);\n this.#layoutTextParams = null;\n this.#styleCache = null;\n }).catch(() => {});\n }\n static get fontFamilyMap() {\n const {\n isWindows,\n isFirefox\n } = util_FeatureTest.platform;\n return shadow(this, \"fontFamilyMap\", new Map([[\"sans-serif\", `${isWindows && isFirefox ? \"Calibri, \" : \"\"}sans-serif`], [\"monospace\", `${isWindows && isFirefox ? \"Lucida Console, \" : \"\"}monospace`]]));\n }\n render() {\n const pump = () => {\n this.#reader.read().then(({\n value,\n done\n }) => {\n if (done) {\n this.#capability.resolve();\n return;\n }\n this.#lang ??= value.lang;\n Object.assign(this.#styleCache, value.styles);\n this.#processItems(value.items);\n pump();\n }, this.#capability.reject);\n };\n this.#reader = this.#textContentSource.getReader();\n TextLayer.#pendingTextLayers.add(this);\n pump();\n return this.#capability.promise;\n }\n update({\n viewport,\n onBefore = null\n }) {\n const scale = viewport.scale * (globalThis.devicePixelRatio || 1);\n const rotation = viewport.rotation;\n if (rotation !== this.#rotation) {\n onBefore?.();\n this.#rotation = rotation;\n setLayerDimensions(this.#rootContainer, {\n rotation\n });\n }\n if (scale !== this.#scale) {\n onBefore?.();\n this.#scale = scale;\n const params = {\n div: null,\n properties: null,\n ctx: TextLayer.#getCtx(this.#lang)\n };\n for (const div of this.#textDivs) {\n params.properties = this.#textDivProperties.get(div);\n params.div = div;\n this.#layout(params);\n }\n }\n }\n cancel() {\n const abortEx = new AbortException(\"TextLayer task cancelled.\");\n this.#reader?.cancel(abortEx).catch(() => {});\n this.#reader = null;\n this.#capability.reject(abortEx);\n }\n get textDivs() {\n return this.#textDivs;\n }\n get textContentItemsStr() {\n return this.#textContentItemsStr;\n }\n #processItems(items) {\n if (this.#disableProcessItems) {\n return;\n }\n this.#layoutTextParams.ctx ??= TextLayer.#getCtx(this.#lang);\n const textDivs = this.#textDivs,\n textContentItemsStr = this.#textContentItemsStr;\n for (const item of items) {\n if (textDivs.length > MAX_TEXT_DIVS_TO_RENDER) {\n warn(\"Ignoring additional textDivs for performance reasons.\");\n this.#disableProcessItems = true;\n return;\n }\n if (item.str === undefined) {\n if (item.type === \"beginMarkedContentProps\" || item.type === \"beginMarkedContent\") {\n const parent = this.#container;\n this.#container = document.createElement(\"span\");\n this.#container.classList.add(\"markedContent\");\n if (item.id !== null) {\n this.#container.setAttribute(\"id\", `${item.id}`);\n }\n parent.append(this.#container);\n } else if (item.type === \"endMarkedContent\") {\n this.#container = this.#container.parentNode;\n }\n continue;\n }\n textContentItemsStr.push(item.str);\n this.#appendText(item);\n }\n }\n #appendText(geom) {\n const textDiv = document.createElement(\"span\");\n const textDivProperties = {\n angle: 0,\n canvasWidth: 0,\n hasText: geom.str !== \"\",\n hasEOL: geom.hasEOL,\n fontSize: 0\n };\n this.#textDivs.push(textDiv);\n const tx = Util.transform(this.#transform, geom.transform);\n let angle = Math.atan2(tx[1], tx[0]);\n const style = this.#styleCache[geom.fontName];\n if (style.vertical) {\n angle += Math.PI / 2;\n }\n let fontFamily = this.#fontInspectorEnabled && style.fontSubstitution || style.fontFamily;\n fontFamily = TextLayer.fontFamilyMap.get(fontFamily) || fontFamily;\n const fontHeight = Math.hypot(tx[2], tx[3]);\n const fontAscent = fontHeight * TextLayer.#getAscent(fontFamily, this.#lang);\n let left, top;\n if (angle === 0) {\n left = tx[4];\n top = tx[5] - fontAscent;\n } else {\n left = tx[4] + fontAscent * Math.sin(angle);\n top = tx[5] - fontAscent * Math.cos(angle);\n }\n const scaleFactorStr = \"calc(var(--scale-factor)*\";\n const divStyle = textDiv.style;\n if (this.#container === this.#rootContainer) {\n divStyle.left = `${(100 * left / this.#pageWidth).toFixed(2)}%`;\n divStyle.top = `${(100 * top / this.#pageHeight).toFixed(2)}%`;\n } else {\n divStyle.left = `${scaleFactorStr}${left.toFixed(2)}px)`;\n divStyle.top = `${scaleFactorStr}${top.toFixed(2)}px)`;\n }\n divStyle.fontSize = `${scaleFactorStr}${(TextLayer.#minFontSize * fontHeight).toFixed(2)}px)`;\n divStyle.fontFamily = fontFamily;\n textDivProperties.fontSize = fontHeight;\n textDiv.setAttribute(\"role\", \"presentation\");\n textDiv.textContent = geom.str;\n textDiv.dir = geom.dir;\n if (this.#fontInspectorEnabled) {\n textDiv.dataset.fontName = style.fontSubstitutionLoadedName || geom.fontName;\n }\n if (angle !== 0) {\n textDivProperties.angle = angle * (180 / Math.PI);\n }\n let shouldScaleText = false;\n if (geom.str.length > 1) {\n shouldScaleText = true;\n } else if (geom.str !== \" \" && geom.transform[0] !== geom.transform[3]) {\n const absScaleX = Math.abs(geom.transform[0]),\n absScaleY = Math.abs(geom.transform[3]);\n if (absScaleX !== absScaleY && Math.max(absScaleX, absScaleY) / Math.min(absScaleX, absScaleY) > 1.5) {\n shouldScaleText = true;\n }\n }\n if (shouldScaleText) {\n textDivProperties.canvasWidth = style.vertical ? geom.height : geom.width;\n }\n this.#textDivProperties.set(textDiv, textDivProperties);\n this.#layoutTextParams.div = textDiv;\n this.#layoutTextParams.properties = textDivProperties;\n this.#layout(this.#layoutTextParams);\n if (textDivProperties.hasText) {\n this.#container.append(textDiv);\n }\n if (textDivProperties.hasEOL) {\n const br = document.createElement(\"br\");\n br.setAttribute(\"role\", \"presentation\");\n this.#container.append(br);\n }\n }\n #layout(params) {\n const {\n div,\n properties,\n ctx\n } = params;\n const {\n style\n } = div;\n let transform = \"\";\n if (TextLayer.#minFontSize > 1) {\n transform = `scale(${1 / TextLayer.#minFontSize})`;\n }\n if (properties.canvasWidth !== 0 && properties.hasText) {\n const {\n fontFamily\n } = style;\n const {\n canvasWidth,\n fontSize\n } = properties;\n TextLayer.#ensureCtxFont(ctx, fontSize * this.#scale, fontFamily);\n const {\n width\n } = ctx.measureText(div.textContent);\n if (width > 0) {\n transform = `scaleX(${canvasWidth * this.#scale / width}) ${transform}`;\n }\n }\n if (properties.angle !== 0) {\n transform = `rotate(${properties.angle}deg) ${transform}`;\n }\n if (transform.length > 0) {\n style.transform = transform;\n }\n }\n static cleanup() {\n if (this.#pendingTextLayers.size > 0) {\n return;\n }\n this.#ascentCache.clear();\n for (const {\n canvas\n } of this.#canvasContexts.values()) {\n canvas.remove();\n }\n this.#canvasContexts.clear();\n }\n static #getCtx(lang = null) {\n let ctx = this.#canvasContexts.get(lang ||= \"\");\n if (!ctx) {\n const canvas = document.createElement(\"canvas\");\n canvas.className = \"hiddenCanvasElement\";\n canvas.lang = lang;\n document.body.append(canvas);\n ctx = canvas.getContext(\"2d\", {\n alpha: false,\n willReadFrequently: true\n });\n this.#canvasContexts.set(lang, ctx);\n this.#canvasCtxFonts.set(ctx, {\n size: 0,\n family: \"\"\n });\n }\n return ctx;\n }\n static #ensureCtxFont(ctx, size, family) {\n const cached = this.#canvasCtxFonts.get(ctx);\n if (size === cached.size && family === cached.family) {\n return;\n }\n ctx.font = `${size}px ${family}`;\n cached.size = size;\n cached.family = family;\n }\n static #ensureMinFontSizeComputed() {\n if (this.#minFontSize !== null) {\n return;\n }\n const div = document.createElement(\"div\");\n div.style.opacity = 0;\n div.style.lineHeight = 1;\n div.style.fontSize = \"1px\";\n div.style.position = \"absolute\";\n div.textContent = \"X\";\n document.body.append(div);\n this.#minFontSize = div.getBoundingClientRect().height;\n div.remove();\n }\n static #getAscent(fontFamily, lang) {\n const cachedAscent = this.#ascentCache.get(fontFamily);\n if (cachedAscent) {\n return cachedAscent;\n }\n const ctx = this.#getCtx(lang);\n ctx.canvas.width = ctx.canvas.height = DEFAULT_FONT_SIZE;\n this.#ensureCtxFont(ctx, DEFAULT_FONT_SIZE, fontFamily);\n const metrics = ctx.measureText(\"\");\n let ascent = metrics.fontBoundingBoxAscent;\n let descent = Math.abs(metrics.fontBoundingBoxDescent);\n if (ascent) {\n const ratio = ascent / (ascent + descent);\n this.#ascentCache.set(fontFamily, ratio);\n ctx.canvas.width = ctx.canvas.height = 0;\n return ratio;\n }\n ctx.strokeStyle = \"red\";\n ctx.clearRect(0, 0, DEFAULT_FONT_SIZE, DEFAULT_FONT_SIZE);\n ctx.strokeText(\"g\", 0, 0);\n let pixels = ctx.getImageData(0, 0, DEFAULT_FONT_SIZE, DEFAULT_FONT_SIZE).data;\n descent = 0;\n for (let i = pixels.length - 1 - 3; i >= 0; i -= 4) {\n if (pixels[i] > 0) {\n descent = Math.ceil(i / 4 / DEFAULT_FONT_SIZE);\n break;\n }\n }\n ctx.clearRect(0, 0, DEFAULT_FONT_SIZE, DEFAULT_FONT_SIZE);\n ctx.strokeText(\"A\", 0, DEFAULT_FONT_SIZE);\n pixels = ctx.getImageData(0, 0, DEFAULT_FONT_SIZE, DEFAULT_FONT_SIZE).data;\n ascent = 0;\n for (let i = 0, ii = pixels.length; i < ii; i += 4) {\n if (pixels[i] > 0) {\n ascent = DEFAULT_FONT_SIZE - Math.floor(i / 4 / DEFAULT_FONT_SIZE);\n break;\n }\n }\n ctx.canvas.width = ctx.canvas.height = 0;\n const ratio = ascent ? ascent / (ascent + descent) : DEFAULT_FONT_ASCENT;\n this.#ascentCache.set(fontFamily, ratio);\n return ratio;\n }\n}\n\n;// ./src/display/xfa_text.js\nclass XfaText {\n static textContent(xfa) {\n const items = [];\n const output = {\n items,\n styles: Object.create(null)\n };\n function walk(node) {\n if (!node) {\n return;\n }\n let str = null;\n const name = node.name;\n if (name === \"#text\") {\n str = node.value;\n } else if (!XfaText.shouldBuildText(name)) {\n return;\n } else if (node?.attributes?.textContent) {\n str = node.attributes.textContent;\n } else if (node.value) {\n str = node.value;\n }\n if (str !== null) {\n items.push({\n str\n });\n }\n if (!node.children) {\n return;\n }\n for (const child of node.children) {\n walk(child);\n }\n }\n walk(xfa);\n return output;\n }\n static shouldBuildText(name) {\n return !(name === \"textarea\" || name === \"input\" || name === \"option\" || name === \"select\");\n }\n}\n\n;// ./src/display/api.js\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nconst DEFAULT_RANGE_CHUNK_SIZE = 65536;\nconst RENDERING_CANCELLED_TIMEOUT = 100;\nconst DELAYED_CLEANUP_TIMEOUT = 5000;\nconst DefaultCanvasFactory = isNodeJS ? NodeCanvasFactory : DOMCanvasFactory;\nconst DefaultCMapReaderFactory = isNodeJS ? NodeCMapReaderFactory : DOMCMapReaderFactory;\nconst DefaultFilterFactory = isNodeJS ? NodeFilterFactory : DOMFilterFactory;\nconst DefaultStandardFontDataFactory = isNodeJS ? NodeStandardFontDataFactory : DOMStandardFontDataFactory;\nfunction getDocument(src = {}) {\n if (typeof src === \"string\" || src instanceof URL) {\n src = {\n url: src\n };\n } else if (src instanceof ArrayBuffer || ArrayBuffer.isView(src)) {\n src = {\n data: src\n };\n }\n const task = new PDFDocumentLoadingTask();\n const {\n docId\n } = task;\n const url = src.url ? getUrlProp(src.url) : null;\n const data = src.data ? getDataProp(src.data) : null;\n const httpHeaders = src.httpHeaders || null;\n const withCredentials = src.withCredentials === true;\n const password = src.password ?? null;\n const rangeTransport = src.range instanceof PDFDataRangeTransport ? src.range : null;\n const rangeChunkSize = Number.isInteger(src.rangeChunkSize) && src.rangeChunkSize > 0 ? src.rangeChunkSize : DEFAULT_RANGE_CHUNK_SIZE;\n let worker = src.worker instanceof PDFWorker ? src.worker : null;\n const verbosity = src.verbosity;\n const docBaseUrl = typeof src.docBaseUrl === \"string\" && !isDataScheme(src.docBaseUrl) ? src.docBaseUrl : null;\n const cMapUrl = typeof src.cMapUrl === \"string\" ? src.cMapUrl : null;\n const cMapPacked = src.cMapPacked !== false;\n const CMapReaderFactory = src.CMapReaderFactory || DefaultCMapReaderFactory;\n const standardFontDataUrl = typeof src.standardFontDataUrl === \"string\" ? src.standardFontDataUrl : null;\n const StandardFontDataFactory = src.StandardFontDataFactory || DefaultStandardFontDataFactory;\n const ignoreErrors = src.stopAtErrors !== true;\n const maxImageSize = Number.isInteger(src.maxImageSize) && src.maxImageSize > -1 ? src.maxImageSize : -1;\n const isEvalSupported = src.isEvalSupported !== false;\n const isOffscreenCanvasSupported = typeof src.isOffscreenCanvasSupported === \"boolean\" ? src.isOffscreenCanvasSupported : !isNodeJS;\n const isImageDecoderSupported = typeof src.isImageDecoderSupported === \"boolean\" ? src.isImageDecoderSupported : !isNodeJS && (util_FeatureTest.platform.isFirefox || !globalThis.chrome);\n const canvasMaxAreaInBytes = Number.isInteger(src.canvasMaxAreaInBytes) ? src.canvasMaxAreaInBytes : -1;\n const disableFontFace = typeof src.disableFontFace === \"boolean\" ? src.disableFontFace : isNodeJS;\n const fontExtraProperties = src.fontExtraProperties === true;\n const enableXfa = src.enableXfa === true;\n const ownerDocument = src.ownerDocument || globalThis.document;\n const disableRange = src.disableRange === true;\n const disableStream = src.disableStream === true;\n const disableAutoFetch = src.disableAutoFetch === true;\n const pdfBug = src.pdfBug === true;\n const CanvasFactory = src.CanvasFactory || DefaultCanvasFactory;\n const FilterFactory = src.FilterFactory || DefaultFilterFactory;\n const enableHWA = src.enableHWA === true;\n const length = rangeTransport ? rangeTransport.length : src.length ?? NaN;\n const useSystemFonts = typeof src.useSystemFonts === \"boolean\" ? src.useSystemFonts : !isNodeJS && !disableFontFace;\n const useWorkerFetch = typeof src.useWorkerFetch === \"boolean\" ? src.useWorkerFetch : CMapReaderFactory === DOMCMapReaderFactory && StandardFontDataFactory === DOMStandardFontDataFactory && cMapUrl && standardFontDataUrl && isValidFetchUrl(cMapUrl, document.baseURI) && isValidFetchUrl(standardFontDataUrl, document.baseURI);\n const styleElement = null;\n setVerbosityLevel(verbosity);\n const transportFactory = {\n canvasFactory: new CanvasFactory({\n ownerDocument,\n enableHWA\n }),\n filterFactory: new FilterFactory({\n docId,\n ownerDocument\n }),\n cMapReaderFactory: useWorkerFetch ? null : new CMapReaderFactory({\n baseUrl: cMapUrl,\n isCompressed: cMapPacked\n }),\n standardFontDataFactory: useWorkerFetch ? null : new StandardFontDataFactory({\n baseUrl: standardFontDataUrl\n })\n };\n if (!worker) {\n const workerParams = {\n verbosity,\n port: GlobalWorkerOptions.workerPort\n };\n worker = workerParams.port ? PDFWorker.fromPort(workerParams) : new PDFWorker(workerParams);\n task._worker = worker;\n }\n const docParams = {\n docId,\n apiVersion: \"4.10.38\",\n data,\n password,\n disableAutoFetch,\n rangeChunkSize,\n length,\n docBaseUrl,\n enableXfa,\n evaluatorOptions: {\n maxImageSize,\n disableFontFace,\n ignoreErrors,\n isEvalSupported,\n isOffscreenCanvasSupported,\n isImageDecoderSupported,\n canvasMaxAreaInBytes,\n fontExtraProperties,\n useSystemFonts,\n cMapUrl: useWorkerFetch ? cMapUrl : null,\n standardFontDataUrl: useWorkerFetch ? standardFontDataUrl : null\n }\n };\n const transportParams = {\n disableFontFace,\n fontExtraProperties,\n ownerDocument,\n pdfBug,\n styleElement,\n loadingParams: {\n disableAutoFetch,\n enableXfa\n }\n };\n worker.promise.then(function () {\n if (task.destroyed) {\n throw new Error(\"Loading aborted\");\n }\n if (worker.destroyed) {\n throw new Error(\"Worker was destroyed\");\n }\n const workerIdPromise = worker.messageHandler.sendWithPromise(\"GetDocRequest\", docParams, data ? [data.buffer] : null);\n let networkStream;\n if (rangeTransport) {\n networkStream = new PDFDataTransportStream(rangeTransport, {\n disableRange,\n disableStream\n });\n } else if (!data) {\n if (!url) {\n throw new Error(\"getDocument - no `url` parameter provided.\");\n }\n let NetworkStream;\n if (isNodeJS) {\n if (isValidFetchUrl(url)) {\n if (typeof fetch === \"undefined\" || typeof Response === \"undefined\" || !(\"body\" in Response.prototype)) {\n throw new Error(\"getDocument - the Fetch API was disabled in Node.js, see `--no-experimental-fetch`.\");\n }\n NetworkStream = PDFFetchStream;\n } else {\n NetworkStream = PDFNodeStream;\n }\n } else {\n NetworkStream = isValidFetchUrl(url) ? PDFFetchStream : PDFNetworkStream;\n }\n networkStream = new NetworkStream({\n url,\n length,\n httpHeaders,\n withCredentials,\n rangeChunkSize,\n disableRange,\n disableStream\n });\n }\n return workerIdPromise.then(workerId => {\n if (task.destroyed) {\n throw new Error(\"Loading aborted\");\n }\n if (worker.destroyed) {\n throw new Error(\"Worker was destroyed\");\n }\n const messageHandler = new MessageHandler(docId, workerId, worker.port);\n const transport = new WorkerTransport(messageHandler, task, networkStream, transportParams, transportFactory);\n task._transport = transport;\n messageHandler.send(\"Ready\", null);\n });\n }).catch(task._capability.reject);\n return task;\n}\nfunction getUrlProp(val) {\n if (val instanceof URL) {\n return val.href;\n }\n try {\n return new URL(val, window.location).href;\n } catch {\n if (isNodeJS && typeof val === \"string\") {\n return val;\n }\n }\n throw new Error(\"Invalid PDF url data: \" + \"either string or URL-object is expected in the url property.\");\n}\nfunction getDataProp(val) {\n if (isNodeJS && typeof Buffer !== \"undefined\" && val instanceof Buffer) {\n throw new Error(\"Please provide binary data as `Uint8Array`, rather than `Buffer`.\");\n }\n if (val instanceof Uint8Array && val.byteLength === val.buffer.byteLength) {\n return val;\n }\n if (typeof val === \"string\") {\n return stringToBytes(val);\n }\n if (val instanceof ArrayBuffer || ArrayBuffer.isView(val) || typeof val === \"object\" && !isNaN(val?.length)) {\n return new Uint8Array(val);\n }\n throw new Error(\"Invalid PDF binary data: either TypedArray, \" + \"string, or array-like object is expected in the data property.\");\n}\nfunction isRefProxy(ref) {\n return typeof ref === \"object\" && Number.isInteger(ref?.num) && ref.num >= 0 && Number.isInteger(ref?.gen) && ref.gen >= 0;\n}\nclass PDFDocumentLoadingTask {\n static #docId = 0;\n constructor() {\n this._capability = Promise.withResolvers();\n this._transport = null;\n this._worker = null;\n this.docId = `d${PDFDocumentLoadingTask.#docId++}`;\n this.destroyed = false;\n this.onPassword = null;\n this.onProgress = null;\n }\n get promise() {\n return this._capability.promise;\n }\n async destroy() {\n this.destroyed = true;\n try {\n if (this._worker?.port) {\n this._worker._pendingDestroy = true;\n }\n await this._transport?.destroy();\n } catch (ex) {\n if (this._worker?.port) {\n delete this._worker._pendingDestroy;\n }\n throw ex;\n }\n this._transport = null;\n this._worker?.destroy();\n this._worker = null;\n }\n}\nclass PDFDataRangeTransport {\n constructor(length, initialData, progressiveDone = false, contentDispositionFilename = null) {\n this.length = length;\n this.initialData = initialData;\n this.progressiveDone = progressiveDone;\n this.contentDispositionFilename = contentDispositionFilename;\n this._rangeListeners = [];\n this._progressListeners = [];\n this._progressiveReadListeners = [];\n this._progressiveDoneListeners = [];\n this._readyCapability = Promise.withResolvers();\n }\n addRangeListener(listener) {\n this._rangeListeners.push(listener);\n }\n addProgressListener(listener) {\n this._progressListeners.push(listener);\n }\n addProgressiveReadListener(listener) {\n this._progressiveReadListeners.push(listener);\n }\n addProgressiveDoneListener(listener) {\n this._progressiveDoneListeners.push(listener);\n }\n onDataRange(begin, chunk) {\n for (const listener of this._rangeListeners) {\n listener(begin, chunk);\n }\n }\n onDataProgress(loaded, total) {\n this._readyCapability.promise.then(() => {\n for (const listener of this._progressListeners) {\n listener(loaded, total);\n }\n });\n }\n onDataProgressiveRead(chunk) {\n this._readyCapability.promise.then(() => {\n for (const listener of this._progressiveReadListeners) {\n listener(chunk);\n }\n });\n }\n onDataProgressiveDone() {\n this._readyCapability.promise.then(() => {\n for (const listener of this._progressiveDoneListeners) {\n listener();\n }\n });\n }\n transportReady() {\n this._readyCapability.resolve();\n }\n requestDataRange(begin, end) {\n unreachable(\"Abstract method PDFDataRangeTransport.requestDataRange\");\n }\n abort() {}\n}\nclass PDFDocumentProxy {\n constructor(pdfInfo, transport) {\n this._pdfInfo = pdfInfo;\n this._transport = transport;\n }\n get annotationStorage() {\n return this._transport.annotationStorage;\n }\n get canvasFactory() {\n return this._transport.canvasFactory;\n }\n get filterFactory() {\n return this._transport.filterFactory;\n }\n get numPages() {\n return this._pdfInfo.numPages;\n }\n get fingerprints() {\n return this._pdfInfo.fingerprints;\n }\n get isPureXfa() {\n return shadow(this, \"isPureXfa\", !!this._transport._htmlForXfa);\n }\n get allXfaHtml() {\n return this._transport._htmlForXfa;\n }\n getPage(pageNumber) {\n return this._transport.getPage(pageNumber);\n }\n getPageIndex(ref) {\n return this._transport.getPageIndex(ref);\n }\n getDestinations() {\n return this._transport.getDestinations();\n }\n getDestination(id) {\n return this._transport.getDestination(id);\n }\n getPageLabels() {\n return this._transport.getPageLabels();\n }\n getPageLayout() {\n return this._transport.getPageLayout();\n }\n getPageMode() {\n return this._transport.getPageMode();\n }\n getViewerPreferences() {\n return this._transport.getViewerPreferences();\n }\n getOpenAction() {\n return this._transport.getOpenAction();\n }\n getAttachments() {\n return this._transport.getAttachments();\n }\n getJSActions() {\n return this._transport.getDocJSActions();\n }\n getOutline() {\n return this._transport.getOutline();\n }\n getOptionalContentConfig({\n intent = \"display\"\n } = {}) {\n const {\n renderingIntent\n } = this._transport.getRenderingIntent(intent);\n return this._transport.getOptionalContentConfig(renderingIntent);\n }\n getPermissions() {\n return this._transport.getPermissions();\n }\n getMetadata() {\n return this._transport.getMetadata();\n }\n getMarkInfo() {\n return this._transport.getMarkInfo();\n }\n getData() {\n return this._transport.getData();\n }\n saveDocument() {\n return this._transport.saveDocument();\n }\n getDownloadInfo() {\n return this._transport.downloadInfoCapability.promise;\n }\n cleanup(keepLoadedFonts = false) {\n return this._transport.startCleanup(keepLoadedFonts || this.isPureXfa);\n }\n destroy() {\n return this.loadingTask.destroy();\n }\n cachedPageNumber(ref) {\n return this._transport.cachedPageNumber(ref);\n }\n get loadingParams() {\n return this._transport.loadingParams;\n }\n get loadingTask() {\n return this._transport.loadingTask;\n }\n getFieldObjects() {\n return this._transport.getFieldObjects();\n }\n hasJSActions() {\n return this._transport.hasJSActions();\n }\n getCalculationOrderIds() {\n return this._transport.getCalculationOrderIds();\n }\n}\nclass PDFPageProxy {\n #delayedCleanupTimeout = null;\n #pendingCleanup = false;\n constructor(pageIndex, pageInfo, transport, pdfBug = false) {\n this._pageIndex = pageIndex;\n this._pageInfo = pageInfo;\n this._transport = transport;\n this._stats = pdfBug ? new StatTimer() : null;\n this._pdfBug = pdfBug;\n this.commonObjs = transport.commonObjs;\n this.objs = new PDFObjects();\n this._maybeCleanupAfterRender = false;\n this._intentStates = new Map();\n this.destroyed = false;\n }\n get pageNumber() {\n return this._pageIndex + 1;\n }\n get rotate() {\n return this._pageInfo.rotate;\n }\n get ref() {\n return this._pageInfo.ref;\n }\n get userUnit() {\n return this._pageInfo.userUnit;\n }\n get view() {\n return this._pageInfo.view;\n }\n getViewport({\n scale,\n rotation = this.rotate,\n offsetX = 0,\n offsetY = 0,\n dontFlip = false\n } = {}) {\n return new PageViewport({\n viewBox: this.view,\n userUnit: this.userUnit,\n scale,\n rotation,\n offsetX,\n offsetY,\n dontFlip\n });\n }\n getAnnotations({\n intent = \"display\"\n } = {}) {\n const {\n renderingIntent\n } = this._transport.getRenderingIntent(intent);\n return this._transport.getAnnotations(this._pageIndex, renderingIntent);\n }\n getJSActions() {\n return this._transport.getPageJSActions(this._pageIndex);\n }\n get filterFactory() {\n return this._transport.filterFactory;\n }\n get isPureXfa() {\n return shadow(this, \"isPureXfa\", !!this._transport._htmlForXfa);\n }\n async getXfa() {\n return this._transport._htmlForXfa?.children[this._pageIndex] || null;\n }\n render({\n canvasContext,\n viewport,\n intent = \"display\",\n annotationMode = AnnotationMode.ENABLE,\n transform = null,\n background = null,\n optionalContentConfigPromise = null,\n annotationCanvasMap = null,\n pageColors = null,\n printAnnotationStorage = null,\n isEditing = false\n }) {\n this._stats?.time(\"Overall\");\n const intentArgs = this._transport.getRenderingIntent(intent, annotationMode, printAnnotationStorage, isEditing);\n const {\n renderingIntent,\n cacheKey\n } = intentArgs;\n this.#pendingCleanup = false;\n this.#abortDelayedCleanup();\n optionalContentConfigPromise ||= this._transport.getOptionalContentConfig(renderingIntent);\n let intentState = this._intentStates.get(cacheKey);\n if (!intentState) {\n intentState = Object.create(null);\n this._intentStates.set(cacheKey, intentState);\n }\n if (intentState.streamReaderCancelTimeout) {\n clearTimeout(intentState.streamReaderCancelTimeout);\n intentState.streamReaderCancelTimeout = null;\n }\n const intentPrint = !!(renderingIntent & RenderingIntentFlag.PRINT);\n if (!intentState.displayReadyCapability) {\n intentState.displayReadyCapability = Promise.withResolvers();\n intentState.operatorList = {\n fnArray: [],\n argsArray: [],\n lastChunk: false,\n separateAnnots: null\n };\n this._stats?.time(\"Page Request\");\n this._pumpOperatorList(intentArgs);\n }\n const complete = error => {\n intentState.renderTasks.delete(internalRenderTask);\n if (this._maybeCleanupAfterRender || intentPrint) {\n this.#pendingCleanup = true;\n }\n this.#tryCleanup(!intentPrint);\n if (error) {\n internalRenderTask.capability.reject(error);\n this._abortOperatorList({\n intentState,\n reason: error instanceof Error ? error : new Error(error)\n });\n } else {\n internalRenderTask.capability.resolve();\n }\n if (this._stats) {\n this._stats.timeEnd(\"Rendering\");\n this._stats.timeEnd(\"Overall\");\n if (globalThis.Stats?.enabled) {\n globalThis.Stats.add(this.pageNumber, this._stats);\n }\n }\n };\n const internalRenderTask = new InternalRenderTask({\n callback: complete,\n params: {\n canvasContext,\n viewport,\n transform,\n background\n },\n objs: this.objs,\n commonObjs: this.commonObjs,\n annotationCanvasMap,\n operatorList: intentState.operatorList,\n pageIndex: this._pageIndex,\n canvasFactory: this._transport.canvasFactory,\n filterFactory: this._transport.filterFactory,\n useRequestAnimationFrame: !intentPrint,\n pdfBug: this._pdfBug,\n pageColors\n });\n (intentState.renderTasks ||= new Set()).add(internalRenderTask);\n const renderTask = internalRenderTask.task;\n Promise.all([intentState.displayReadyCapability.promise, optionalContentConfigPromise]).then(([transparency, optionalContentConfig]) => {\n if (this.destroyed) {\n complete();\n return;\n }\n this._stats?.time(\"Rendering\");\n if (!(optionalContentConfig.renderingIntent & renderingIntent)) {\n throw new Error(\"Must use the same `intent`-argument when calling the `PDFPageProxy.render` \" + \"and `PDFDocumentProxy.getOptionalContentConfig` methods.\");\n }\n internalRenderTask.initializeGraphics({\n transparency,\n optionalContentConfig\n });\n internalRenderTask.operatorListChanged();\n }).catch(complete);\n return renderTask;\n }\n getOperatorList({\n intent = \"display\",\n annotationMode = AnnotationMode.ENABLE,\n printAnnotationStorage = null,\n isEditing = false\n } = {}) {\n function operatorListChanged() {\n if (intentState.operatorList.lastChunk) {\n intentState.opListReadCapability.resolve(intentState.operatorList);\n intentState.renderTasks.delete(opListTask);\n }\n }\n const intentArgs = this._transport.getRenderingIntent(intent, annotationMode, printAnnotationStorage, isEditing, true);\n let intentState = this._intentStates.get(intentArgs.cacheKey);\n if (!intentState) {\n intentState = Object.create(null);\n this._intentStates.set(intentArgs.cacheKey, intentState);\n }\n let opListTask;\n if (!intentState.opListReadCapability) {\n opListTask = Object.create(null);\n opListTask.operatorListChanged = operatorListChanged;\n intentState.opListReadCapability = Promise.withResolvers();\n (intentState.renderTasks ||= new Set()).add(opListTask);\n intentState.operatorList = {\n fnArray: [],\n argsArray: [],\n lastChunk: false,\n separateAnnots: null\n };\n this._stats?.time(\"Page Request\");\n this._pumpOperatorList(intentArgs);\n }\n return intentState.opListReadCapability.promise;\n }\n streamTextContent({\n includeMarkedContent = false,\n disableNormalization = false\n } = {}) {\n const TEXT_CONTENT_CHUNK_SIZE = 100;\n return this._transport.messageHandler.sendWithStream(\"GetTextContent\", {\n pageIndex: this._pageIndex,\n includeMarkedContent: includeMarkedContent === true,\n disableNormalization: disableNormalization === true\n }, {\n highWaterMark: TEXT_CONTENT_CHUNK_SIZE,\n size(textContent) {\n return textContent.items.length;\n }\n });\n }\n getTextContent(params = {}) {\n if (this._transport._htmlForXfa) {\n return this.getXfa().then(xfa => XfaText.textContent(xfa));\n }\n const readableStream = this.streamTextContent(params);\n return new Promise(function (resolve, reject) {\n function pump() {\n reader.read().then(function ({\n value,\n done\n }) {\n if (done) {\n resolve(textContent);\n return;\n }\n textContent.lang ??= value.lang;\n Object.assign(textContent.styles, value.styles);\n textContent.items.push(...value.items);\n pump();\n }, reject);\n }\n const reader = readableStream.getReader();\n const textContent = {\n items: [],\n styles: Object.create(null),\n lang: null\n };\n pump();\n });\n }\n getStructTree() {\n return this._transport.getStructTree(this._pageIndex);\n }\n _destroy() {\n this.destroyed = true;\n const waitOn = [];\n for (const intentState of this._intentStates.values()) {\n this._abortOperatorList({\n intentState,\n reason: new Error(\"Page was destroyed.\"),\n force: true\n });\n if (intentState.opListReadCapability) {\n continue;\n }\n for (const internalRenderTask of intentState.renderTasks) {\n waitOn.push(internalRenderTask.completed);\n internalRenderTask.cancel();\n }\n }\n this.objs.clear();\n this.#pendingCleanup = false;\n this.#abortDelayedCleanup();\n return Promise.all(waitOn);\n }\n cleanup(resetStats = false) {\n this.#pendingCleanup = true;\n const success = this.#tryCleanup(false);\n if (resetStats && success) {\n this._stats &&= new StatTimer();\n }\n return success;\n }\n #tryCleanup(delayed = false) {\n this.#abortDelayedCleanup();\n if (!this.#pendingCleanup || this.destroyed) {\n return false;\n }\n if (delayed) {\n this.#delayedCleanupTimeout = setTimeout(() => {\n this.#delayedCleanupTimeout = null;\n this.#tryCleanup(false);\n }, DELAYED_CLEANUP_TIMEOUT);\n return false;\n }\n for (const {\n renderTasks,\n operatorList\n } of this._intentStates.values()) {\n if (renderTasks.size > 0 || !operatorList.lastChunk) {\n return false;\n }\n }\n this._intentStates.clear();\n this.objs.clear();\n this.#pendingCleanup = false;\n return true;\n }\n #abortDelayedCleanup() {\n if (this.#delayedCleanupTimeout) {\n clearTimeout(this.#delayedCleanupTimeout);\n this.#delayedCleanupTimeout = null;\n }\n }\n _startRenderPage(transparency, cacheKey) {\n const intentState = this._intentStates.get(cacheKey);\n if (!intentState) {\n return;\n }\n this._stats?.timeEnd(\"Page Request\");\n intentState.displayReadyCapability?.resolve(transparency);\n }\n _renderPageChunk(operatorListChunk, intentState) {\n for (let i = 0, ii = operatorListChunk.length; i < ii; i++) {\n intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);\n intentState.operatorList.argsArray.push(operatorListChunk.argsArray[i]);\n }\n intentState.operatorList.lastChunk = operatorListChunk.lastChunk;\n intentState.operatorList.separateAnnots = operatorListChunk.separateAnnots;\n for (const internalRenderTask of intentState.renderTasks) {\n internalRenderTask.operatorListChanged();\n }\n if (operatorListChunk.lastChunk) {\n this.#tryCleanup(true);\n }\n }\n _pumpOperatorList({\n renderingIntent,\n cacheKey,\n annotationStorageSerializable,\n modifiedIds\n }) {\n const {\n map,\n transfer\n } = annotationStorageSerializable;\n const readableStream = this._transport.messageHandler.sendWithStream(\"GetOperatorList\", {\n pageIndex: this._pageIndex,\n intent: renderingIntent,\n cacheKey,\n annotationStorage: map,\n modifiedIds\n }, transfer);\n const reader = readableStream.getReader();\n const intentState = this._intentStates.get(cacheKey);\n intentState.streamReader = reader;\n const pump = () => {\n reader.read().then(({\n value,\n done\n }) => {\n if (done) {\n intentState.streamReader = null;\n return;\n }\n if (this._transport.destroyed) {\n return;\n }\n this._renderPageChunk(value, intentState);\n pump();\n }, reason => {\n intentState.streamReader = null;\n if (this._transport.destroyed) {\n return;\n }\n if (intentState.operatorList) {\n intentState.operatorList.lastChunk = true;\n for (const internalRenderTask of intentState.renderTasks) {\n internalRenderTask.operatorListChanged();\n }\n this.#tryCleanup(true);\n }\n if (intentState.displayReadyCapability) {\n intentState.displayReadyCapability.reject(reason);\n } else if (intentState.opListReadCapability) {\n intentState.opListReadCapability.reject(reason);\n } else {\n throw reason;\n }\n });\n };\n pump();\n }\n _abortOperatorList({\n intentState,\n reason,\n force = false\n }) {\n if (!intentState.streamReader) {\n return;\n }\n if (intentState.streamReaderCancelTimeout) {\n clearTimeout(intentState.streamReaderCancelTimeout);\n intentState.streamReaderCancelTimeout = null;\n }\n if (!force) {\n if (intentState.renderTasks.size > 0) {\n return;\n }\n if (reason instanceof RenderingCancelledException) {\n let delay = RENDERING_CANCELLED_TIMEOUT;\n if (reason.extraDelay > 0 && reason.extraDelay < 1000) {\n delay += reason.extraDelay;\n }\n intentState.streamReaderCancelTimeout = setTimeout(() => {\n intentState.streamReaderCancelTimeout = null;\n this._abortOperatorList({\n intentState,\n reason,\n force: true\n });\n }, delay);\n return;\n }\n }\n intentState.streamReader.cancel(new AbortException(reason.message)).catch(() => {});\n intentState.streamReader = null;\n if (this._transport.destroyed) {\n return;\n }\n for (const [curCacheKey, curIntentState] of this._intentStates) {\n if (curIntentState === intentState) {\n this._intentStates.delete(curCacheKey);\n break;\n }\n }\n this.cleanup();\n }\n get stats() {\n return this._stats;\n }\n}\nclass LoopbackPort {\n #listeners = new Map();\n #deferred = Promise.resolve();\n postMessage(obj, transfer) {\n const event = {\n data: structuredClone(obj, transfer ? {\n transfer\n } : null)\n };\n this.#deferred.then(() => {\n for (const [listener] of this.#listeners) {\n listener.call(this, event);\n }\n });\n }\n addEventListener(name, listener, options = null) {\n let rmAbort = null;\n if (options?.signal instanceof AbortSignal) {\n const {\n signal\n } = options;\n if (signal.aborted) {\n warn(\"LoopbackPort - cannot use an `aborted` signal.\");\n return;\n }\n const onAbort = () => this.removeEventListener(name, listener);\n rmAbort = () => signal.removeEventListener(\"abort\", onAbort);\n signal.addEventListener(\"abort\", onAbort);\n }\n this.#listeners.set(listener, rmAbort);\n }\n removeEventListener(name, listener) {\n const rmAbort = this.#listeners.get(listener);\n rmAbort?.();\n this.#listeners.delete(listener);\n }\n terminate() {\n for (const [, rmAbort] of this.#listeners) {\n rmAbort?.();\n }\n this.#listeners.clear();\n }\n}\nclass PDFWorker {\n static #fakeWorkerId = 0;\n static #isWorkerDisabled = false;\n static #workerPorts;\n static {\n if (isNodeJS) {\n this.#isWorkerDisabled = true;\n GlobalWorkerOptions.workerSrc ||= \"./pdf.worker.mjs\";\n }\n this._isSameOrigin = (baseUrl, otherUrl) => {\n let base;\n try {\n base = new URL(baseUrl);\n if (!base.origin || base.origin === \"null\") {\n return false;\n }\n } catch {\n return false;\n }\n const other = new URL(otherUrl, base);\n return base.origin === other.origin;\n };\n this._createCDNWrapper = url => {\n const wrapper = `await import(\"${url}\");`;\n return URL.createObjectURL(new Blob([wrapper], {\n type: \"text/javascript\"\n }));\n };\n }\n constructor({\n name = null,\n port = null,\n verbosity = getVerbosityLevel()\n } = {}) {\n this.name = name;\n this.destroyed = false;\n this.verbosity = verbosity;\n this._readyCapability = Promise.withResolvers();\n this._port = null;\n this._webWorker = null;\n this._messageHandler = null;\n if (port) {\n if (PDFWorker.#workerPorts?.has(port)) {\n throw new Error(\"Cannot use more than one PDFWorker per port.\");\n }\n (PDFWorker.#workerPorts ||= new WeakMap()).set(port, this);\n this._initializeFromPort(port);\n return;\n }\n this._initialize();\n }\n get promise() {\n return this._readyCapability.promise;\n }\n #resolve() {\n this._readyCapability.resolve();\n this._messageHandler.send(\"configure\", {\n verbosity: this.verbosity\n });\n }\n get port() {\n return this._port;\n }\n get messageHandler() {\n return this._messageHandler;\n }\n _initializeFromPort(port) {\n this._port = port;\n this._messageHandler = new MessageHandler(\"main\", \"worker\", port);\n this._messageHandler.on(\"ready\", function () {});\n this.#resolve();\n }\n _initialize() {\n if (PDFWorker.#isWorkerDisabled || PDFWorker.#mainThreadWorkerMessageHandler) {\n this._setupFakeWorker();\n return;\n }\n let {\n workerSrc\n } = PDFWorker;\n try {\n if (!PDFWorker._isSameOrigin(window.location.href, workerSrc)) {\n workerSrc = PDFWorker._createCDNWrapper(new URL(workerSrc, window.location).href);\n }\n const worker = new Worker(workerSrc, {\n type: \"module\"\n });\n const messageHandler = new MessageHandler(\"main\", \"worker\", worker);\n const terminateEarly = () => {\n ac.abort();\n messageHandler.destroy();\n worker.terminate();\n if (this.destroyed) {\n this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n } else {\n this._setupFakeWorker();\n }\n };\n const ac = new AbortController();\n worker.addEventListener(\"error\", () => {\n if (!this._webWorker) {\n terminateEarly();\n }\n }, {\n signal: ac.signal\n });\n messageHandler.on(\"test\", data => {\n ac.abort();\n if (this.destroyed || !data) {\n terminateEarly();\n return;\n }\n this._messageHandler = messageHandler;\n this._port = worker;\n this._webWorker = worker;\n this.#resolve();\n });\n messageHandler.on(\"ready\", data => {\n ac.abort();\n if (this.destroyed) {\n terminateEarly();\n return;\n }\n try {\n sendTest();\n } catch {\n this._setupFakeWorker();\n }\n });\n const sendTest = () => {\n const testObj = new Uint8Array();\n messageHandler.send(\"test\", testObj, [testObj.buffer]);\n };\n sendTest();\n return;\n } catch {\n info(\"The worker has been disabled.\");\n }\n this._setupFakeWorker();\n }\n _setupFakeWorker() {\n if (!PDFWorker.#isWorkerDisabled) {\n warn(\"Setting up fake worker.\");\n PDFWorker.#isWorkerDisabled = true;\n }\n PDFWorker._setupFakeWorkerGlobal.then(WorkerMessageHandler => {\n if (this.destroyed) {\n this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n return;\n }\n const port = new LoopbackPort();\n this._port = port;\n const id = `fake${PDFWorker.#fakeWorkerId++}`;\n const workerHandler = new MessageHandler(id + \"_worker\", id, port);\n WorkerMessageHandler.setup(workerHandler, port);\n this._messageHandler = new MessageHandler(id, id + \"_worker\", port);\n this.#resolve();\n }).catch(reason => {\n this._readyCapability.reject(new Error(`Setting up fake worker failed: \"${reason.message}\".`));\n });\n }\n destroy() {\n this.destroyed = true;\n this._webWorker?.terminate();\n this._webWorker = null;\n PDFWorker.#workerPorts?.delete(this._port);\n this._port = null;\n this._messageHandler?.destroy();\n this._messageHandler = null;\n }\n static fromPort(params) {\n if (!params?.port) {\n throw new Error(\"PDFWorker.fromPort - invalid method signature.\");\n }\n const cachedPort = this.#workerPorts?.get(params.port);\n if (cachedPort) {\n if (cachedPort._pendingDestroy) {\n throw new Error(\"PDFWorker.fromPort - the worker is being destroyed.\\n\" + \"Please remember to await `PDFDocumentLoadingTask.destroy()`-calls.\");\n }\n return cachedPort;\n }\n return new PDFWorker(params);\n }\n static get workerSrc() {\n if (GlobalWorkerOptions.workerSrc) {\n return GlobalWorkerOptions.workerSrc;\n }\n throw new Error('No \"GlobalWorkerOptions.workerSrc\" specified.');\n }\n static get #mainThreadWorkerMessageHandler() {\n try {\n return globalThis.pdfjsWorker?.WorkerMessageHandler || null;\n } catch {\n return null;\n }\n }\n static get _setupFakeWorkerGlobal() {\n const loader = async () => {\n if (this.#mainThreadWorkerMessageHandler) {\n return this.#mainThreadWorkerMessageHandler;\n }\n const worker = await import(/*webpackIgnore: true*/this.workerSrc);\n return worker.WorkerMessageHandler;\n };\n return shadow(this, \"_setupFakeWorkerGlobal\", loader());\n }\n}\nclass WorkerTransport {\n #methodPromises = new Map();\n #pageCache = new Map();\n #pagePromises = new Map();\n #pageRefCache = new Map();\n #passwordCapability = null;\n constructor(messageHandler, loadingTask, networkStream, params, factory) {\n this.messageHandler = messageHandler;\n this.loadingTask = loadingTask;\n this.commonObjs = new PDFObjects();\n this.fontLoader = new FontLoader({\n ownerDocument: params.ownerDocument,\n styleElement: params.styleElement\n });\n this.loadingParams = params.loadingParams;\n this._params = params;\n this.canvasFactory = factory.canvasFactory;\n this.filterFactory = factory.filterFactory;\n this.cMapReaderFactory = factory.cMapReaderFactory;\n this.standardFontDataFactory = factory.standardFontDataFactory;\n this.destroyed = false;\n this.destroyCapability = null;\n this._networkStream = networkStream;\n this._fullReader = null;\n this._lastProgress = null;\n this.downloadInfoCapability = Promise.withResolvers();\n this.setupMessageHandler();\n }\n #cacheSimpleMethod(name, data = null) {\n const cachedPromise = this.#methodPromises.get(name);\n if (cachedPromise) {\n return cachedPromise;\n }\n const promise = this.messageHandler.sendWithPromise(name, data);\n this.#methodPromises.set(name, promise);\n return promise;\n }\n get annotationStorage() {\n return shadow(this, \"annotationStorage\", new AnnotationStorage());\n }\n getRenderingIntent(intent, annotationMode = AnnotationMode.ENABLE, printAnnotationStorage = null, isEditing = false, isOpList = false) {\n let renderingIntent = RenderingIntentFlag.DISPLAY;\n let annotationStorageSerializable = SerializableEmpty;\n switch (intent) {\n case \"any\":\n renderingIntent = RenderingIntentFlag.ANY;\n break;\n case \"display\":\n break;\n case \"print\":\n renderingIntent = RenderingIntentFlag.PRINT;\n break;\n default:\n warn(`getRenderingIntent - invalid intent: ${intent}`);\n }\n const annotationStorage = renderingIntent & RenderingIntentFlag.PRINT && printAnnotationStorage instanceof PrintAnnotationStorage ? printAnnotationStorage : this.annotationStorage;\n switch (annotationMode) {\n case AnnotationMode.DISABLE:\n renderingIntent += RenderingIntentFlag.ANNOTATIONS_DISABLE;\n break;\n case AnnotationMode.ENABLE:\n break;\n case AnnotationMode.ENABLE_FORMS:\n renderingIntent += RenderingIntentFlag.ANNOTATIONS_FORMS;\n break;\n case AnnotationMode.ENABLE_STORAGE:\n renderingIntent += RenderingIntentFlag.ANNOTATIONS_STORAGE;\n annotationStorageSerializable = annotationStorage.serializable;\n break;\n default:\n warn(`getRenderingIntent - invalid annotationMode: ${annotationMode}`);\n }\n if (isEditing) {\n renderingIntent += RenderingIntentFlag.IS_EDITING;\n }\n if (isOpList) {\n renderingIntent += RenderingIntentFlag.OPLIST;\n }\n const {\n ids: modifiedIds,\n hash: modifiedIdsHash\n } = annotationStorage.modifiedIds;\n const cacheKeyBuf = [renderingIntent, annotationStorageSerializable.hash, modifiedIdsHash];\n return {\n renderingIntent,\n cacheKey: cacheKeyBuf.join(\"_\"),\n annotationStorageSerializable,\n modifiedIds\n };\n }\n destroy() {\n if (this.destroyCapability) {\n return this.destroyCapability.promise;\n }\n this.destroyed = true;\n this.destroyCapability = Promise.withResolvers();\n this.#passwordCapability?.reject(new Error(\"Worker was destroyed during onPassword callback\"));\n const waitOn = [];\n for (const page of this.#pageCache.values()) {\n waitOn.push(page._destroy());\n }\n this.#pageCache.clear();\n this.#pagePromises.clear();\n this.#pageRefCache.clear();\n if (this.hasOwnProperty(\"annotationStorage\")) {\n this.annotationStorage.resetModified();\n }\n const terminated = this.messageHandler.sendWithPromise(\"Terminate\", null);\n waitOn.push(terminated);\n Promise.all(waitOn).then(() => {\n this.commonObjs.clear();\n this.fontLoader.clear();\n this.#methodPromises.clear();\n this.filterFactory.destroy();\n TextLayer.cleanup();\n this._networkStream?.cancelAllRequests(new AbortException(\"Worker was terminated.\"));\n this.messageHandler?.destroy();\n this.messageHandler = null;\n this.destroyCapability.resolve();\n }, this.destroyCapability.reject);\n return this.destroyCapability.promise;\n }\n setupMessageHandler() {\n const {\n messageHandler,\n loadingTask\n } = this;\n messageHandler.on(\"GetReader\", (data, sink) => {\n assert(this._networkStream, \"GetReader - no `IPDFStream` instance available.\");\n this._fullReader = this._networkStream.getFullReader();\n this._fullReader.onProgress = evt => {\n this._lastProgress = {\n loaded: evt.loaded,\n total: evt.total\n };\n };\n sink.onPull = () => {\n this._fullReader.read().then(function ({\n value,\n done\n }) {\n if (done) {\n sink.close();\n return;\n }\n assert(value instanceof ArrayBuffer, \"GetReader - expected an ArrayBuffer.\");\n sink.enqueue(new Uint8Array(value), 1, [value]);\n }).catch(reason => {\n sink.error(reason);\n });\n };\n sink.onCancel = reason => {\n this._fullReader.cancel(reason);\n sink.ready.catch(readyReason => {\n if (this.destroyed) {\n return;\n }\n throw readyReason;\n });\n };\n });\n messageHandler.on(\"ReaderHeadersReady\", async data => {\n await this._fullReader.headersReady;\n const {\n isStreamingSupported,\n isRangeSupported,\n contentLength\n } = this._fullReader;\n if (!isStreamingSupported || !isRangeSupported) {\n if (this._lastProgress) {\n loadingTask.onProgress?.(this._lastProgress);\n }\n this._fullReader.onProgress = evt => {\n loadingTask.onProgress?.({\n loaded: evt.loaded,\n total: evt.total\n });\n };\n }\n return {\n isStreamingSupported,\n isRangeSupported,\n contentLength\n };\n });\n messageHandler.on(\"GetRangeReader\", (data, sink) => {\n assert(this._networkStream, \"GetRangeReader - no `IPDFStream` instance available.\");\n const rangeReader = this._networkStream.getRangeReader(data.begin, data.end);\n if (!rangeReader) {\n sink.close();\n return;\n }\n sink.onPull = () => {\n rangeReader.read().then(function ({\n value,\n done\n }) {\n if (done) {\n sink.close();\n return;\n }\n assert(value instanceof ArrayBuffer, \"GetRangeReader - expected an ArrayBuffer.\");\n sink.enqueue(new Uint8Array(value), 1, [value]);\n }).catch(reason => {\n sink.error(reason);\n });\n };\n sink.onCancel = reason => {\n rangeReader.cancel(reason);\n sink.ready.catch(readyReason => {\n if (this.destroyed) {\n return;\n }\n throw readyReason;\n });\n };\n });\n messageHandler.on(\"GetDoc\", ({\n pdfInfo\n }) => {\n this._numPages = pdfInfo.numPages;\n this._htmlForXfa = pdfInfo.htmlForXfa;\n delete pdfInfo.htmlForXfa;\n loadingTask._capability.resolve(new PDFDocumentProxy(pdfInfo, this));\n });\n messageHandler.on(\"DocException\", ex => {\n loadingTask._capability.reject(wrapReason(ex));\n });\n messageHandler.on(\"PasswordRequest\", ex => {\n this.#passwordCapability = Promise.withResolvers();\n try {\n if (!loadingTask.onPassword) {\n throw wrapReason(ex);\n }\n const updatePassword = password => {\n if (password instanceof Error) {\n this.#passwordCapability.reject(password);\n } else {\n this.#passwordCapability.resolve({\n password\n });\n }\n };\n loadingTask.onPassword(updatePassword, ex.code);\n } catch (err) {\n this.#passwordCapability.reject(err);\n }\n return this.#passwordCapability.promise;\n });\n messageHandler.on(\"DataLoaded\", data => {\n loadingTask.onProgress?.({\n loaded: data.length,\n total: data.length\n });\n this.downloadInfoCapability.resolve(data);\n });\n messageHandler.on(\"StartRenderPage\", data => {\n if (this.destroyed) {\n return;\n }\n const page = this.#pageCache.get(data.pageIndex);\n page._startRenderPage(data.transparency, data.cacheKey);\n });\n messageHandler.on(\"commonobj\", ([id, type, exportedData]) => {\n if (this.destroyed) {\n return null;\n }\n if (this.commonObjs.has(id)) {\n return null;\n }\n switch (type) {\n case \"Font\":\n const {\n disableFontFace,\n fontExtraProperties,\n pdfBug\n } = this._params;\n if (\"error\" in exportedData) {\n const exportedError = exportedData.error;\n warn(`Error during font loading: ${exportedError}`);\n this.commonObjs.resolve(id, exportedError);\n break;\n }\n const inspectFont = pdfBug && globalThis.FontInspector?.enabled ? (font, url) => globalThis.FontInspector.fontAdded(font, url) : null;\n const font = new FontFaceObject(exportedData, {\n disableFontFace,\n fontExtraProperties,\n inspectFont\n });\n this.fontLoader.bind(font).catch(() => messageHandler.sendWithPromise(\"FontFallback\", {\n id\n })).finally(() => {\n if (!fontExtraProperties && font.data) {\n font.data = null;\n }\n this.commonObjs.resolve(id, font);\n });\n break;\n case \"CopyLocalImage\":\n const {\n imageRef\n } = exportedData;\n assert(imageRef, \"The imageRef must be defined.\");\n for (const pageProxy of this.#pageCache.values()) {\n for (const [, data] of pageProxy.objs) {\n if (data?.ref !== imageRef) {\n continue;\n }\n if (!data.dataLen) {\n return null;\n }\n this.commonObjs.resolve(id, structuredClone(data));\n return data.dataLen;\n }\n }\n break;\n case \"FontPath\":\n case \"Image\":\n case \"Pattern\":\n this.commonObjs.resolve(id, exportedData);\n break;\n default:\n throw new Error(`Got unknown common object type ${type}`);\n }\n return null;\n });\n messageHandler.on(\"obj\", ([id, pageIndex, type, imageData]) => {\n if (this.destroyed) {\n return;\n }\n const pageProxy = this.#pageCache.get(pageIndex);\n if (pageProxy.objs.has(id)) {\n return;\n }\n if (pageProxy._intentStates.size === 0) {\n imageData?.bitmap?.close();\n return;\n }\n switch (type) {\n case \"Image\":\n pageProxy.objs.resolve(id, imageData);\n if (imageData?.dataLen > MAX_IMAGE_SIZE_TO_CACHE) {\n pageProxy._maybeCleanupAfterRender = true;\n }\n break;\n case \"Pattern\":\n pageProxy.objs.resolve(id, imageData);\n break;\n default:\n throw new Error(`Got unknown object type ${type}`);\n }\n });\n messageHandler.on(\"DocProgress\", data => {\n if (this.destroyed) {\n return;\n }\n loadingTask.onProgress?.({\n loaded: data.loaded,\n total: data.total\n });\n });\n messageHandler.on(\"FetchBuiltInCMap\", async data => {\n if (this.destroyed) {\n throw new Error(\"Worker was destroyed.\");\n }\n if (!this.cMapReaderFactory) {\n throw new Error(\"CMapReaderFactory not initialized, see the `useWorkerFetch` parameter.\");\n }\n return this.cMapReaderFactory.fetch(data);\n });\n messageHandler.on(\"FetchStandardFontData\", async data => {\n if (this.destroyed) {\n throw new Error(\"Worker was destroyed.\");\n }\n if (!this.standardFontDataFactory) {\n throw new Error(\"StandardFontDataFactory not initialized, see the `useWorkerFetch` parameter.\");\n }\n return this.standardFontDataFactory.fetch(data);\n });\n }\n getData() {\n return this.messageHandler.sendWithPromise(\"GetData\", null);\n }\n saveDocument() {\n if (this.annotationStorage.size <= 0) {\n warn(\"saveDocument called while `annotationStorage` is empty, \" + \"please use the getData-method instead.\");\n }\n const {\n map,\n transfer\n } = this.annotationStorage.serializable;\n return this.messageHandler.sendWithPromise(\"SaveDocument\", {\n isPureXfa: !!this._htmlForXfa,\n numPages: this._numPages,\n annotationStorage: map,\n filename: this._fullReader?.filename ?? null\n }, transfer).finally(() => {\n this.annotationStorage.resetModified();\n });\n }\n getPage(pageNumber) {\n if (!Number.isInteger(pageNumber) || pageNumber <= 0 || pageNumber > this._numPages) {\n return Promise.reject(new Error(\"Invalid page request.\"));\n }\n const pageIndex = pageNumber - 1,\n cachedPromise = this.#pagePromises.get(pageIndex);\n if (cachedPromise) {\n return cachedPromise;\n }\n const promise = this.messageHandler.sendWithPromise(\"GetPage\", {\n pageIndex\n }).then(pageInfo => {\n if (this.destroyed) {\n throw new Error(\"Transport destroyed\");\n }\n if (pageInfo.refStr) {\n this.#pageRefCache.set(pageInfo.refStr, pageNumber);\n }\n const page = new PDFPageProxy(pageIndex, pageInfo, this, this._params.pdfBug);\n this.#pageCache.set(pageIndex, page);\n return page;\n });\n this.#pagePromises.set(pageIndex, promise);\n return promise;\n }\n getPageIndex(ref) {\n if (!isRefProxy(ref)) {\n return Promise.reject(new Error(\"Invalid pageIndex request.\"));\n }\n return this.messageHandler.sendWithPromise(\"GetPageIndex\", {\n num: ref.num,\n gen: ref.gen\n });\n }\n getAnnotations(pageIndex, intent) {\n return this.messageHandler.sendWithPromise(\"GetAnnotations\", {\n pageIndex,\n intent\n });\n }\n getFieldObjects() {\n return this.#cacheSimpleMethod(\"GetFieldObjects\");\n }\n hasJSActions() {\n return this.#cacheSimpleMethod(\"HasJSActions\");\n }\n getCalculationOrderIds() {\n return this.messageHandler.sendWithPromise(\"GetCalculationOrderIds\", null);\n }\n getDestinations() {\n return this.messageHandler.sendWithPromise(\"GetDestinations\", null);\n }\n getDestination(id) {\n if (typeof id !== \"string\") {\n return Promise.reject(new Error(\"Invalid destination request.\"));\n }\n return this.messageHandler.sendWithPromise(\"GetDestination\", {\n id\n });\n }\n getPageLabels() {\n return this.messageHandler.sendWithPromise(\"GetPageLabels\", null);\n }\n getPageLayout() {\n return this.messageHandler.sendWithPromise(\"GetPageLayout\", null);\n }\n getPageMode() {\n return this.messageHandler.sendWithPromise(\"GetPageMode\", null);\n }\n getViewerPreferences() {\n return this.messageHandler.sendWithPromise(\"GetViewerPreferences\", null);\n }\n getOpenAction() {\n return this.messageHandler.sendWithPromise(\"GetOpenAction\", null);\n }\n getAttachments() {\n return this.messageHandler.sendWithPromise(\"GetAttachments\", null);\n }\n getDocJSActions() {\n return this.#cacheSimpleMethod(\"GetDocJSActions\");\n }\n getPageJSActions(pageIndex) {\n return this.messageHandler.sendWithPromise(\"GetPageJSActions\", {\n pageIndex\n });\n }\n getStructTree(pageIndex) {\n return this.messageHandler.sendWithPromise(\"GetStructTree\", {\n pageIndex\n });\n }\n getOutline() {\n return this.messageHandler.sendWithPromise(\"GetOutline\", null);\n }\n getOptionalContentConfig(renderingIntent) {\n return this.#cacheSimpleMethod(\"GetOptionalContentConfig\").then(data => new OptionalContentConfig(data, renderingIntent));\n }\n getPermissions() {\n return this.messageHandler.sendWithPromise(\"GetPermissions\", null);\n }\n getMetadata() {\n const name = \"GetMetadata\",\n cachedPromise = this.#methodPromises.get(name);\n if (cachedPromise) {\n return cachedPromise;\n }\n const promise = this.messageHandler.sendWithPromise(name, null).then(results => ({\n info: results[0],\n metadata: results[1] ? new Metadata(results[1]) : null,\n contentDispositionFilename: this._fullReader?.filename ?? null,\n contentLength: this._fullReader?.contentLength ?? null\n }));\n this.#methodPromises.set(name, promise);\n return promise;\n }\n getMarkInfo() {\n return this.messageHandler.sendWithPromise(\"GetMarkInfo\", null);\n }\n async startCleanup(keepLoadedFonts = false) {\n if (this.destroyed) {\n return;\n }\n await this.messageHandler.sendWithPromise(\"Cleanup\", null);\n for (const page of this.#pageCache.values()) {\n const cleanupSuccessful = page.cleanup();\n if (!cleanupSuccessful) {\n throw new Error(`startCleanup: Page ${page.pageNumber} is currently rendering.`);\n }\n }\n this.commonObjs.clear();\n if (!keepLoadedFonts) {\n this.fontLoader.clear();\n }\n this.#methodPromises.clear();\n this.filterFactory.destroy(true);\n TextLayer.cleanup();\n }\n cachedPageNumber(ref) {\n if (!isRefProxy(ref)) {\n return null;\n }\n const refStr = ref.gen === 0 ? `${ref.num}R` : `${ref.num}R${ref.gen}`;\n return this.#pageRefCache.get(refStr) ?? null;\n }\n}\nconst INITIAL_DATA = Symbol(\"INITIAL_DATA\");\nclass PDFObjects {\n #objs = Object.create(null);\n #ensureObj(objId) {\n return this.#objs[objId] ||= {\n ...Promise.withResolvers(),\n data: INITIAL_DATA\n };\n }\n get(objId, callback = null) {\n if (callback) {\n const obj = this.#ensureObj(objId);\n obj.promise.then(() => callback(obj.data));\n return null;\n }\n const obj = this.#objs[objId];\n if (!obj || obj.data === INITIAL_DATA) {\n throw new Error(`Requesting object that isn't resolved yet ${objId}.`);\n }\n return obj.data;\n }\n has(objId) {\n const obj = this.#objs[objId];\n return !!obj && obj.data !== INITIAL_DATA;\n }\n delete(objId) {\n const obj = this.#objs[objId];\n if (!obj || obj.data === INITIAL_DATA) {\n return false;\n }\n delete this.#objs[objId];\n return true;\n }\n resolve(objId, data = null) {\n const obj = this.#ensureObj(objId);\n obj.data = data;\n obj.resolve();\n }\n clear() {\n for (const objId in this.#objs) {\n const {\n data\n } = this.#objs[objId];\n data?.bitmap?.close();\n }\n this.#objs = Object.create(null);\n }\n *[Symbol.iterator]() {\n for (const objId in this.#objs) {\n const {\n data\n } = this.#objs[objId];\n if (data === INITIAL_DATA) {\n continue;\n }\n yield [objId, data];\n }\n }\n}\nclass RenderTask {\n #internalRenderTask = null;\n constructor(internalRenderTask) {\n this.#internalRenderTask = internalRenderTask;\n this.onContinue = null;\n }\n get promise() {\n return this.#internalRenderTask.capability.promise;\n }\n cancel(extraDelay = 0) {\n this.#internalRenderTask.cancel(null, extraDelay);\n }\n get separateAnnots() {\n const {\n separateAnnots\n } = this.#internalRenderTask.operatorList;\n if (!separateAnnots) {\n return false;\n }\n const {\n annotationCanvasMap\n } = this.#internalRenderTask;\n return separateAnnots.form || separateAnnots.canvas && annotationCanvasMap?.size > 0;\n }\n}\nclass InternalRenderTask {\n #rAF = null;\n static #canvasInUse = new WeakSet();\n constructor({\n callback,\n params,\n objs,\n commonObjs,\n annotationCanvasMap,\n operatorList,\n pageIndex,\n canvasFactory,\n filterFactory,\n useRequestAnimationFrame = false,\n pdfBug = false,\n pageColors = null\n }) {\n this.callback = callback;\n this.params = params;\n this.objs = objs;\n this.commonObjs = commonObjs;\n this.annotationCanvasMap = annotationCanvasMap;\n this.operatorListIdx = null;\n this.operatorList = operatorList;\n this._pageIndex = pageIndex;\n this.canvasFactory = canvasFactory;\n this.filterFactory = filterFactory;\n this._pdfBug = pdfBug;\n this.pageColors = pageColors;\n this.running = false;\n this.graphicsReadyCallback = null;\n this.graphicsReady = false;\n this._useRequestAnimationFrame = useRequestAnimationFrame === true && typeof window !== \"undefined\";\n this.cancelled = false;\n this.capability = Promise.withResolvers();\n this.task = new RenderTask(this);\n this._cancelBound = this.cancel.bind(this);\n this._continueBound = this._continue.bind(this);\n this._scheduleNextBound = this._scheduleNext.bind(this);\n this._nextBound = this._next.bind(this);\n this._canvas = params.canvasContext.canvas;\n }\n get completed() {\n return this.capability.promise.catch(function () {});\n }\n initializeGraphics({\n transparency = false,\n optionalContentConfig\n }) {\n if (this.cancelled) {\n return;\n }\n if (this._canvas) {\n if (InternalRenderTask.#canvasInUse.has(this._canvas)) {\n throw new Error(\"Cannot use the same canvas during multiple render() operations. \" + \"Use different canvas or ensure previous operations were \" + \"cancelled or completed.\");\n }\n InternalRenderTask.#canvasInUse.add(this._canvas);\n }\n if (this._pdfBug && globalThis.StepperManager?.enabled) {\n this.stepper = globalThis.StepperManager.create(this._pageIndex);\n this.stepper.init(this.operatorList);\n this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();\n }\n const {\n canvasContext,\n viewport,\n transform,\n background\n } = this.params;\n this.gfx = new CanvasGraphics(canvasContext, this.commonObjs, this.objs, this.canvasFactory, this.filterFactory, {\n optionalContentConfig\n }, this.annotationCanvasMap, this.pageColors);\n this.gfx.beginDrawing({\n transform,\n viewport,\n transparency,\n background\n });\n this.operatorListIdx = 0;\n this.graphicsReady = true;\n this.graphicsReadyCallback?.();\n }\n cancel(error = null, extraDelay = 0) {\n this.running = false;\n this.cancelled = true;\n this.gfx?.endDrawing();\n if (this.#rAF) {\n window.cancelAnimationFrame(this.#rAF);\n this.#rAF = null;\n }\n InternalRenderTask.#canvasInUse.delete(this._canvas);\n this.callback(error || new RenderingCancelledException(`Rendering cancelled, page ${this._pageIndex + 1}`, extraDelay));\n }\n operatorListChanged() {\n if (!this.graphicsReady) {\n this.graphicsReadyCallback ||= this._continueBound;\n return;\n }\n this.stepper?.updateOperatorList(this.operatorList);\n if (this.running) {\n return;\n }\n this._continue();\n }\n _continue() {\n this.running = true;\n if (this.cancelled) {\n return;\n }\n if (this.task.onContinue) {\n this.task.onContinue(this._scheduleNextBound);\n } else {\n this._scheduleNext();\n }\n }\n _scheduleNext() {\n if (this._useRequestAnimationFrame) {\n this.#rAF = window.requestAnimationFrame(() => {\n this.#rAF = null;\n this._nextBound().catch(this._cancelBound);\n });\n } else {\n Promise.resolve().then(this._nextBound).catch(this._cancelBound);\n }\n }\n async _next() {\n if (this.cancelled) {\n return;\n }\n this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, this.operatorListIdx, this._continueBound, this.stepper);\n if (this.operatorListIdx === this.operatorList.argsArray.length) {\n this.running = false;\n if (this.operatorList.lastChunk) {\n this.gfx.endDrawing();\n InternalRenderTask.#canvasInUse.delete(this._canvas);\n this.callback();\n }\n }\n }\n}\nconst version = \"4.10.38\";\nconst build = \"f9bea397f\";\n\n;// ./src/shared/scripting_utils.js\nfunction makeColorComp(n) {\n return Math.floor(Math.max(0, Math.min(1, n)) * 255).toString(16).padStart(2, \"0\");\n}\nfunction scaleAndClamp(x) {\n return Math.max(0, Math.min(255, 255 * x));\n}\nclass ColorConverters {\n static CMYK_G([c, y, m, k]) {\n return [\"G\", 1 - Math.min(1, 0.3 * c + 0.59 * m + 0.11 * y + k)];\n }\n static G_CMYK([g]) {\n return [\"CMYK\", 0, 0, 0, 1 - g];\n }\n static G_RGB([g]) {\n return [\"RGB\", g, g, g];\n }\n static G_rgb([g]) {\n g = scaleAndClamp(g);\n return [g, g, g];\n }\n static G_HTML([g]) {\n const G = makeColorComp(g);\n return `#${G}${G}${G}`;\n }\n static RGB_G([r, g, b]) {\n return [\"G\", 0.3 * r + 0.59 * g + 0.11 * b];\n }\n static RGB_rgb(color) {\n return color.map(scaleAndClamp);\n }\n static RGB_HTML(color) {\n return `#${color.map(makeColorComp).join(\"\")}`;\n }\n static T_HTML() {\n return \"#00000000\";\n }\n static T_rgb() {\n return [null];\n }\n static CMYK_RGB([c, y, m, k]) {\n return [\"RGB\", 1 - Math.min(1, c + k), 1 - Math.min(1, m + k), 1 - Math.min(1, y + k)];\n }\n static CMYK_rgb([c, y, m, k]) {\n return [scaleAndClamp(1 - Math.min(1, c + k)), scaleAndClamp(1 - Math.min(1, m + k)), scaleAndClamp(1 - Math.min(1, y + k))];\n }\n static CMYK_HTML(components) {\n const rgb = this.CMYK_RGB(components).slice(1);\n return this.RGB_HTML(rgb);\n }\n static RGB_CMYK([r, g, b]) {\n const c = 1 - r;\n const m = 1 - g;\n const y = 1 - b;\n const k = Math.min(c, m, y);\n return [\"CMYK\", c, m, y, k];\n }\n}\n\n;// ./src/display/svg_factory.js\n\n\nclass BaseSVGFactory {\n create(width, height, skipDimensions = false) {\n if (width <= 0 || height <= 0) {\n throw new Error(\"Invalid SVG dimensions\");\n }\n const svg = this._createSVG(\"svg:svg\");\n svg.setAttribute(\"version\", \"1.1\");\n if (!skipDimensions) {\n svg.setAttribute(\"width\", `${width}px`);\n svg.setAttribute(\"height\", `${height}px`);\n }\n svg.setAttribute(\"preserveAspectRatio\", \"none\");\n svg.setAttribute(\"viewBox\", `0 0 ${width} ${height}`);\n return svg;\n }\n createElement(type) {\n if (typeof type !== \"string\") {\n throw new Error(\"Invalid SVG element type\");\n }\n return this._createSVG(type);\n }\n _createSVG(type) {\n unreachable(\"Abstract method `_createSVG` called.\");\n }\n}\nclass DOMSVGFactory extends BaseSVGFactory {\n _createSVG(type) {\n return document.createElementNS(SVG_NS, type);\n }\n}\n\n;// ./src/display/xfa_layer.js\n\nclass XfaLayer {\n static setupStorage(html, id, element, storage, intent) {\n const storedData = storage.getValue(id, {\n value: null\n });\n switch (element.name) {\n case \"textarea\":\n if (storedData.value !== null) {\n html.textContent = storedData.value;\n }\n if (intent === \"print\") {\n break;\n }\n html.addEventListener(\"input\", event => {\n storage.setValue(id, {\n value: event.target.value\n });\n });\n break;\n case \"input\":\n if (element.attributes.type === \"radio\" || element.attributes.type === \"checkbox\") {\n if (storedData.value === element.attributes.xfaOn) {\n html.setAttribute(\"checked\", true);\n } else if (storedData.value === element.attributes.xfaOff) {\n html.removeAttribute(\"checked\");\n }\n if (intent === \"print\") {\n break;\n }\n html.addEventListener(\"change\", event => {\n storage.setValue(id, {\n value: event.target.checked ? event.target.getAttribute(\"xfaOn\") : event.target.getAttribute(\"xfaOff\")\n });\n });\n } else {\n if (storedData.value !== null) {\n html.setAttribute(\"value\", storedData.value);\n }\n if (intent === \"print\") {\n break;\n }\n html.addEventListener(\"input\", event => {\n storage.setValue(id, {\n value: event.target.value\n });\n });\n }\n break;\n case \"select\":\n if (storedData.value !== null) {\n html.setAttribute(\"value\", storedData.value);\n for (const option of element.children) {\n if (option.attributes.value === storedData.value) {\n option.attributes.selected = true;\n } else if (option.attributes.hasOwnProperty(\"selected\")) {\n delete option.attributes.selected;\n }\n }\n }\n html.addEventListener(\"input\", event => {\n const options = event.target.options;\n const value = options.selectedIndex === -1 ? \"\" : options[options.selectedIndex].value;\n storage.setValue(id, {\n value\n });\n });\n break;\n }\n }\n static setAttributes({\n html,\n element,\n storage = null,\n intent,\n linkService\n }) {\n const {\n attributes\n } = element;\n const isHTMLAnchorElement = html instanceof HTMLAnchorElement;\n if (attributes.type === \"radio\") {\n attributes.name = `${attributes.name}-${intent}`;\n }\n for (const [key, value] of Object.entries(attributes)) {\n if (value === null || value === undefined) {\n continue;\n }\n switch (key) {\n case \"class\":\n if (value.length) {\n html.setAttribute(key, value.join(\" \"));\n }\n break;\n case \"dataId\":\n break;\n case \"id\":\n html.setAttribute(\"data-element-id\", value);\n break;\n case \"style\":\n Object.assign(html.style, value);\n break;\n case \"textContent\":\n html.textContent = value;\n break;\n default:\n if (!isHTMLAnchorElement || key !== \"href\" && key !== \"newWindow\") {\n html.setAttribute(key, value);\n }\n }\n }\n if (isHTMLAnchorElement) {\n linkService.addLinkAttributes(html, attributes.href, attributes.newWindow);\n }\n if (storage && attributes.dataId) {\n this.setupStorage(html, attributes.dataId, element, storage);\n }\n }\n static render(parameters) {\n const storage = parameters.annotationStorage;\n const linkService = parameters.linkService;\n const root = parameters.xfaHtml;\n const intent = parameters.intent || \"display\";\n const rootHtml = document.createElement(root.name);\n if (root.attributes) {\n this.setAttributes({\n html: rootHtml,\n element: root,\n intent,\n linkService\n });\n }\n const isNotForRichText = intent !== \"richText\";\n const rootDiv = parameters.div;\n rootDiv.append(rootHtml);\n if (parameters.viewport) {\n const transform = `matrix(${parameters.viewport.transform.join(\",\")})`;\n rootDiv.style.transform = transform;\n }\n if (isNotForRichText) {\n rootDiv.setAttribute(\"class\", \"xfaLayer xfaFont\");\n }\n const textDivs = [];\n if (root.children.length === 0) {\n if (root.value) {\n const node = document.createTextNode(root.value);\n rootHtml.append(node);\n if (isNotForRichText && XfaText.shouldBuildText(root.name)) {\n textDivs.push(node);\n }\n }\n return {\n textDivs\n };\n }\n const stack = [[root, -1, rootHtml]];\n while (stack.length > 0) {\n const [parent, i, html] = stack.at(-1);\n if (i + 1 === parent.children.length) {\n stack.pop();\n continue;\n }\n const child = parent.children[++stack.at(-1)[1]];\n if (child === null) {\n continue;\n }\n const {\n name\n } = child;\n if (name === \"#text\") {\n const node = document.createTextNode(child.value);\n textDivs.push(node);\n html.append(node);\n continue;\n }\n const childHtml = child?.attributes?.xmlns ? document.createElementNS(child.attributes.xmlns, name) : document.createElement(name);\n html.append(childHtml);\n if (child.attributes) {\n this.setAttributes({\n html: childHtml,\n element: child,\n storage,\n intent,\n linkService\n });\n }\n if (child.children?.length > 0) {\n stack.push([child, -1, childHtml]);\n } else if (child.value) {\n const node = document.createTextNode(child.value);\n if (isNotForRichText && XfaText.shouldBuildText(name)) {\n textDivs.push(node);\n }\n childHtml.append(node);\n }\n }\n for (const el of rootDiv.querySelectorAll(\".xfaNonInteractive input, .xfaNonInteractive textarea\")) {\n el.setAttribute(\"readOnly\", true);\n }\n return {\n textDivs\n };\n }\n static update(parameters) {\n const transform = `matrix(${parameters.viewport.transform.join(\",\")})`;\n parameters.div.style.transform = transform;\n parameters.div.hidden = false;\n }\n}\n\n;// ./src/display/annotation_layer.js\n\n\n\n\n\n\nconst DEFAULT_TAB_INDEX = 1000;\nconst annotation_layer_DEFAULT_FONT_SIZE = 9;\nconst GetElementsByNameSet = new WeakSet();\nfunction getRectDims(rect) {\n return {\n width: rect[2] - rect[0],\n height: rect[3] - rect[1]\n };\n}\nclass AnnotationElementFactory {\n static create(parameters) {\n const subtype = parameters.data.annotationType;\n switch (subtype) {\n case AnnotationType.LINK:\n return new LinkAnnotationElement(parameters);\n case AnnotationType.TEXT:\n return new TextAnnotationElement(parameters);\n case AnnotationType.WIDGET:\n const fieldType = parameters.data.fieldType;\n switch (fieldType) {\n case \"Tx\":\n return new TextWidgetAnnotationElement(parameters);\n case \"Btn\":\n if (parameters.data.radioButton) {\n return new RadioButtonWidgetAnnotationElement(parameters);\n } else if (parameters.data.checkBox) {\n return new CheckboxWidgetAnnotationElement(parameters);\n }\n return new PushButtonWidgetAnnotationElement(parameters);\n case \"Ch\":\n return new ChoiceWidgetAnnotationElement(parameters);\n case \"Sig\":\n return new SignatureWidgetAnnotationElement(parameters);\n }\n return new WidgetAnnotationElement(parameters);\n case AnnotationType.POPUP:\n return new PopupAnnotationElement(parameters);\n case AnnotationType.FREETEXT:\n return new FreeTextAnnotationElement(parameters);\n case AnnotationType.LINE:\n return new LineAnnotationElement(parameters);\n case AnnotationType.SQUARE:\n return new SquareAnnotationElement(parameters);\n case AnnotationType.CIRCLE:\n return new CircleAnnotationElement(parameters);\n case AnnotationType.POLYLINE:\n return new PolylineAnnotationElement(parameters);\n case AnnotationType.CARET:\n return new CaretAnnotationElement(parameters);\n case AnnotationType.INK:\n return new InkAnnotationElement(parameters);\n case AnnotationType.POLYGON:\n return new PolygonAnnotationElement(parameters);\n case AnnotationType.HIGHLIGHT:\n return new HighlightAnnotationElement(parameters);\n case AnnotationType.UNDERLINE:\n return new UnderlineAnnotationElement(parameters);\n case AnnotationType.SQUIGGLY:\n return new SquigglyAnnotationElement(parameters);\n case AnnotationType.STRIKEOUT:\n return new StrikeOutAnnotationElement(parameters);\n case AnnotationType.STAMP:\n return new StampAnnotationElement(parameters);\n case AnnotationType.FILEATTACHMENT:\n return new FileAttachmentAnnotationElement(parameters);\n default:\n return new AnnotationElement(parameters);\n }\n }\n}\nclass AnnotationElement {\n #updates = null;\n #hasBorder = false;\n #popupElement = null;\n constructor(parameters, {\n isRenderable = false,\n ignoreBorder = false,\n createQuadrilaterals = false\n } = {}) {\n this.isRenderable = isRenderable;\n this.data = parameters.data;\n this.layer = parameters.layer;\n this.linkService = parameters.linkService;\n this.downloadManager = parameters.downloadManager;\n this.imageResourcesPath = parameters.imageResourcesPath;\n this.renderForms = parameters.renderForms;\n this.svgFactory = parameters.svgFactory;\n this.annotationStorage = parameters.annotationStorage;\n this.enableScripting = parameters.enableScripting;\n this.hasJSActions = parameters.hasJSActions;\n this._fieldObjects = parameters.fieldObjects;\n this.parent = parameters.parent;\n if (isRenderable) {\n this.container = this._createContainer(ignoreBorder);\n }\n if (createQuadrilaterals) {\n this._createQuadrilaterals();\n }\n }\n static _hasPopupData({\n titleObj,\n contentsObj,\n richText\n }) {\n return !!(titleObj?.str || contentsObj?.str || richText?.str);\n }\n get _isEditable() {\n return this.data.isEditable;\n }\n get hasPopupData() {\n return AnnotationElement._hasPopupData(this.data);\n }\n updateEdited(params) {\n if (!this.container) {\n return;\n }\n this.#updates ||= {\n rect: this.data.rect.slice(0)\n };\n const {\n rect\n } = params;\n if (rect) {\n this.#setRectEdited(rect);\n }\n this.#popupElement?.popup.updateEdited(params);\n }\n resetEdited() {\n if (!this.#updates) {\n return;\n }\n this.#setRectEdited(this.#updates.rect);\n this.#popupElement?.popup.resetEdited();\n this.#updates = null;\n }\n #setRectEdited(rect) {\n const {\n container: {\n style\n },\n data: {\n rect: currentRect,\n rotation\n },\n parent: {\n viewport: {\n rawDims: {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n }\n }\n }\n } = this;\n currentRect?.splice(0, 4, ...rect);\n const {\n width,\n height\n } = getRectDims(rect);\n style.left = `${100 * (rect[0] - pageX) / pageWidth}%`;\n style.top = `${100 * (pageHeight - rect[3] + pageY) / pageHeight}%`;\n if (rotation === 0) {\n style.width = `${100 * width / pageWidth}%`;\n style.height = `${100 * height / pageHeight}%`;\n } else {\n this.setRotation(rotation);\n }\n }\n _createContainer(ignoreBorder) {\n const {\n data,\n parent: {\n page,\n viewport\n }\n } = this;\n const container = document.createElement(\"section\");\n container.setAttribute(\"data-annotation-id\", data.id);\n if (!(this instanceof WidgetAnnotationElement)) {\n container.tabIndex = DEFAULT_TAB_INDEX;\n }\n const {\n style\n } = container;\n style.zIndex = this.parent.zIndex++;\n if (data.alternativeText) {\n container.title = data.alternativeText;\n }\n if (data.noRotate) {\n container.classList.add(\"norotate\");\n }\n if (!data.rect || this instanceof PopupAnnotationElement) {\n const {\n rotation\n } = data;\n if (!data.hasOwnCanvas && rotation !== 0) {\n this.setRotation(rotation, container);\n }\n return container;\n }\n const {\n width,\n height\n } = getRectDims(data.rect);\n if (!ignoreBorder && data.borderStyle.width > 0) {\n style.borderWidth = `${data.borderStyle.width}px`;\n const horizontalRadius = data.borderStyle.horizontalCornerRadius;\n const verticalRadius = data.borderStyle.verticalCornerRadius;\n if (horizontalRadius > 0 || verticalRadius > 0) {\n const radius = `calc(${horizontalRadius}px * var(--scale-factor)) / calc(${verticalRadius}px * var(--scale-factor))`;\n style.borderRadius = radius;\n } else if (this instanceof RadioButtonWidgetAnnotationElement) {\n const radius = `calc(${width}px * var(--scale-factor)) / calc(${height}px * var(--scale-factor))`;\n style.borderRadius = radius;\n }\n switch (data.borderStyle.style) {\n case AnnotationBorderStyleType.SOLID:\n style.borderStyle = \"solid\";\n break;\n case AnnotationBorderStyleType.DASHED:\n style.borderStyle = \"dashed\";\n break;\n case AnnotationBorderStyleType.BEVELED:\n warn(\"Unimplemented border style: beveled\");\n break;\n case AnnotationBorderStyleType.INSET:\n warn(\"Unimplemented border style: inset\");\n break;\n case AnnotationBorderStyleType.UNDERLINE:\n style.borderBottomStyle = \"solid\";\n break;\n default:\n break;\n }\n const borderColor = data.borderColor || null;\n if (borderColor) {\n this.#hasBorder = true;\n style.borderColor = Util.makeHexColor(borderColor[0] | 0, borderColor[1] | 0, borderColor[2] | 0);\n } else {\n style.borderWidth = 0;\n }\n }\n const rect = Util.normalizeRect([data.rect[0], page.view[3] - data.rect[1] + page.view[1], data.rect[2], page.view[3] - data.rect[3] + page.view[1]]);\n const {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n } = viewport.rawDims;\n style.left = `${100 * (rect[0] - pageX) / pageWidth}%`;\n style.top = `${100 * (rect[1] - pageY) / pageHeight}%`;\n const {\n rotation\n } = data;\n if (data.hasOwnCanvas || rotation === 0) {\n style.width = `${100 * width / pageWidth}%`;\n style.height = `${100 * height / pageHeight}%`;\n } else {\n this.setRotation(rotation, container);\n }\n return container;\n }\n setRotation(angle, container = this.container) {\n if (!this.data.rect) {\n return;\n }\n const {\n pageWidth,\n pageHeight\n } = this.parent.viewport.rawDims;\n const {\n width,\n height\n } = getRectDims(this.data.rect);\n let elementWidth, elementHeight;\n if (angle % 180 === 0) {\n elementWidth = 100 * width / pageWidth;\n elementHeight = 100 * height / pageHeight;\n } else {\n elementWidth = 100 * height / pageWidth;\n elementHeight = 100 * width / pageHeight;\n }\n container.style.width = `${elementWidth}%`;\n container.style.height = `${elementHeight}%`;\n container.setAttribute(\"data-main-rotation\", (360 - angle) % 360);\n }\n get _commonActions() {\n const setColor = (jsName, styleName, event) => {\n const color = event.detail[jsName];\n const colorType = color[0];\n const colorArray = color.slice(1);\n event.target.style[styleName] = ColorConverters[`${colorType}_HTML`](colorArray);\n this.annotationStorage.setValue(this.data.id, {\n [styleName]: ColorConverters[`${colorType}_rgb`](colorArray)\n });\n };\n return shadow(this, \"_commonActions\", {\n display: event => {\n const {\n display\n } = event.detail;\n const hidden = display % 2 === 1;\n this.container.style.visibility = hidden ? \"hidden\" : \"visible\";\n this.annotationStorage.setValue(this.data.id, {\n noView: hidden,\n noPrint: display === 1 || display === 2\n });\n },\n print: event => {\n this.annotationStorage.setValue(this.data.id, {\n noPrint: !event.detail.print\n });\n },\n hidden: event => {\n const {\n hidden\n } = event.detail;\n this.container.style.visibility = hidden ? \"hidden\" : \"visible\";\n this.annotationStorage.setValue(this.data.id, {\n noPrint: hidden,\n noView: hidden\n });\n },\n focus: event => {\n setTimeout(() => event.target.focus({\n preventScroll: false\n }), 0);\n },\n userName: event => {\n event.target.title = event.detail.userName;\n },\n readonly: event => {\n event.target.disabled = event.detail.readonly;\n },\n required: event => {\n this._setRequired(event.target, event.detail.required);\n },\n bgColor: event => {\n setColor(\"bgColor\", \"backgroundColor\", event);\n },\n fillColor: event => {\n setColor(\"fillColor\", \"backgroundColor\", event);\n },\n fgColor: event => {\n setColor(\"fgColor\", \"color\", event);\n },\n textColor: event => {\n setColor(\"textColor\", \"color\", event);\n },\n borderColor: event => {\n setColor(\"borderColor\", \"borderColor\", event);\n },\n strokeColor: event => {\n setColor(\"strokeColor\", \"borderColor\", event);\n },\n rotation: event => {\n const angle = event.detail.rotation;\n this.setRotation(angle);\n this.annotationStorage.setValue(this.data.id, {\n rotation: angle\n });\n }\n });\n }\n _dispatchEventFromSandbox(actions, jsEvent) {\n const commonActions = this._commonActions;\n for (const name of Object.keys(jsEvent.detail)) {\n const action = actions[name] || commonActions[name];\n action?.(jsEvent);\n }\n }\n _setDefaultPropertiesFromJS(element) {\n if (!this.enableScripting) {\n return;\n }\n const storedData = this.annotationStorage.getRawValue(this.data.id);\n if (!storedData) {\n return;\n }\n const commonActions = this._commonActions;\n for (const [actionName, detail] of Object.entries(storedData)) {\n const action = commonActions[actionName];\n if (action) {\n const eventProxy = {\n detail: {\n [actionName]: detail\n },\n target: element\n };\n action(eventProxy);\n delete storedData[actionName];\n }\n }\n }\n _createQuadrilaterals() {\n if (!this.container) {\n return;\n }\n const {\n quadPoints\n } = this.data;\n if (!quadPoints) {\n return;\n }\n const [rectBlX, rectBlY, rectTrX, rectTrY] = this.data.rect.map(x => Math.fround(x));\n if (quadPoints.length === 8) {\n const [trX, trY, blX, blY] = quadPoints.subarray(2, 6);\n if (rectTrX === trX && rectTrY === trY && rectBlX === blX && rectBlY === blY) {\n return;\n }\n }\n const {\n style\n } = this.container;\n let svgBuffer;\n if (this.#hasBorder) {\n const {\n borderColor,\n borderWidth\n } = style;\n style.borderWidth = 0;\n svgBuffer = [\"url('data:image/svg+xml;utf8,\", `')`);\n style.backgroundImage = svgBuffer.join(\"\");\n }\n this.container.append(svg);\n this.container.style.clipPath = `url(#${id})`;\n }\n _createPopup() {\n const {\n data\n } = this;\n const popup = this.#popupElement = new PopupAnnotationElement({\n data: {\n color: data.color,\n titleObj: data.titleObj,\n modificationDate: data.modificationDate,\n contentsObj: data.contentsObj,\n richText: data.richText,\n parentRect: data.rect,\n borderStyle: 0,\n id: `popup_${data.id}`,\n rotation: data.rotation\n },\n parent: this.parent,\n elements: [this]\n });\n this.parent.div.append(popup.render());\n }\n render() {\n unreachable(\"Abstract method `AnnotationElement.render` called\");\n }\n _getElementsByName(name, skipId = null) {\n const fields = [];\n if (this._fieldObjects) {\n const fieldObj = this._fieldObjects[name];\n if (fieldObj) {\n for (const {\n page,\n id,\n exportValues\n } of fieldObj) {\n if (page === -1) {\n continue;\n }\n if (id === skipId) {\n continue;\n }\n const exportValue = typeof exportValues === \"string\" ? exportValues : null;\n const domElement = document.querySelector(`[data-element-id=\"${id}\"]`);\n if (domElement && !GetElementsByNameSet.has(domElement)) {\n warn(`_getElementsByName - element not allowed: ${id}`);\n continue;\n }\n fields.push({\n id,\n exportValue,\n domElement\n });\n }\n }\n return fields;\n }\n for (const domElement of document.getElementsByName(name)) {\n const {\n exportValue\n } = domElement;\n const id = domElement.getAttribute(\"data-element-id\");\n if (id === skipId) {\n continue;\n }\n if (!GetElementsByNameSet.has(domElement)) {\n continue;\n }\n fields.push({\n id,\n exportValue,\n domElement\n });\n }\n return fields;\n }\n show() {\n if (this.container) {\n this.container.hidden = false;\n }\n this.popup?.maybeShow();\n }\n hide() {\n if (this.container) {\n this.container.hidden = true;\n }\n this.popup?.forceHide();\n }\n getElementsToTriggerPopup() {\n return this.container;\n }\n addHighlightArea() {\n const triggers = this.getElementsToTriggerPopup();\n if (Array.isArray(triggers)) {\n for (const element of triggers) {\n element.classList.add(\"highlightArea\");\n }\n } else {\n triggers.classList.add(\"highlightArea\");\n }\n }\n _editOnDoubleClick() {\n if (!this._isEditable) {\n return;\n }\n const {\n annotationEditorType: mode,\n data: {\n id: editId\n }\n } = this;\n this.container.addEventListener(\"dblclick\", () => {\n this.linkService.eventBus?.dispatch(\"switchannotationeditormode\", {\n source: this,\n mode,\n editId\n });\n });\n }\n}\nclass LinkAnnotationElement extends AnnotationElement {\n constructor(parameters, options = null) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: !!options?.ignoreBorder,\n createQuadrilaterals: true\n });\n this.isTooltipOnly = parameters.data.isTooltipOnly;\n }\n render() {\n const {\n data,\n linkService\n } = this;\n const link = document.createElement(\"a\");\n link.setAttribute(\"data-element-id\", data.id);\n let isBound = false;\n if (data.url) {\n linkService.addLinkAttributes(link, data.url, data.newWindow);\n isBound = true;\n } else if (data.action) {\n this._bindNamedAction(link, data.action);\n isBound = true;\n } else if (data.attachment) {\n this.#bindAttachment(link, data.attachment, data.attachmentDest);\n isBound = true;\n } else if (data.setOCGState) {\n this.#bindSetOCGState(link, data.setOCGState);\n isBound = true;\n } else if (data.dest) {\n this._bindLink(link, data.dest);\n isBound = true;\n } else {\n if (data.actions && (data.actions.Action || data.actions[\"Mouse Up\"] || data.actions[\"Mouse Down\"]) && this.enableScripting && this.hasJSActions) {\n this._bindJSAction(link, data);\n isBound = true;\n }\n if (data.resetForm) {\n this._bindResetFormAction(link, data.resetForm);\n isBound = true;\n } else if (this.isTooltipOnly && !isBound) {\n this._bindLink(link, \"\");\n isBound = true;\n }\n }\n this.container.classList.add(\"linkAnnotation\");\n if (isBound) {\n this.container.append(link);\n }\n return this.container;\n }\n #setInternalLink() {\n this.container.setAttribute(\"data-internal-link\", \"\");\n }\n _bindLink(link, destination) {\n link.href = this.linkService.getDestinationHash(destination);\n link.onclick = () => {\n if (destination) {\n this.linkService.goToDestination(destination);\n }\n return false;\n };\n if (destination || destination === \"\") {\n this.#setInternalLink();\n }\n }\n _bindNamedAction(link, action) {\n link.href = this.linkService.getAnchorUrl(\"\");\n link.onclick = () => {\n this.linkService.executeNamedAction(action);\n return false;\n };\n this.#setInternalLink();\n }\n #bindAttachment(link, attachment, dest = null) {\n link.href = this.linkService.getAnchorUrl(\"\");\n if (attachment.description) {\n link.title = attachment.description;\n }\n link.onclick = () => {\n this.downloadManager?.openOrDownloadData(attachment.content, attachment.filename, dest);\n return false;\n };\n this.#setInternalLink();\n }\n #bindSetOCGState(link, action) {\n link.href = this.linkService.getAnchorUrl(\"\");\n link.onclick = () => {\n this.linkService.executeSetOCGState(action);\n return false;\n };\n this.#setInternalLink();\n }\n _bindJSAction(link, data) {\n link.href = this.linkService.getAnchorUrl(\"\");\n const map = new Map([[\"Action\", \"onclick\"], [\"Mouse Up\", \"onmouseup\"], [\"Mouse Down\", \"onmousedown\"]]);\n for (const name of Object.keys(data.actions)) {\n const jsName = map.get(name);\n if (!jsName) {\n continue;\n }\n link[jsName] = () => {\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id: data.id,\n name\n }\n });\n return false;\n };\n }\n if (!link.onclick) {\n link.onclick = () => false;\n }\n this.#setInternalLink();\n }\n _bindResetFormAction(link, resetForm) {\n const otherClickAction = link.onclick;\n if (!otherClickAction) {\n link.href = this.linkService.getAnchorUrl(\"\");\n }\n this.#setInternalLink();\n if (!this._fieldObjects) {\n warn(`_bindResetFormAction - \"resetForm\" action not supported, ` + \"ensure that the `fieldObjects` parameter is provided.\");\n if (!otherClickAction) {\n link.onclick = () => false;\n }\n return;\n }\n link.onclick = () => {\n otherClickAction?.();\n const {\n fields: resetFormFields,\n refs: resetFormRefs,\n include\n } = resetForm;\n const allFields = [];\n if (resetFormFields.length !== 0 || resetFormRefs.length !== 0) {\n const fieldIds = new Set(resetFormRefs);\n for (const fieldName of resetFormFields) {\n const fields = this._fieldObjects[fieldName] || [];\n for (const {\n id\n } of fields) {\n fieldIds.add(id);\n }\n }\n for (const fields of Object.values(this._fieldObjects)) {\n for (const field of fields) {\n if (fieldIds.has(field.id) === include) {\n allFields.push(field);\n }\n }\n }\n } else {\n for (const fields of Object.values(this._fieldObjects)) {\n allFields.push(...fields);\n }\n }\n const storage = this.annotationStorage;\n const allIds = [];\n for (const field of allFields) {\n const {\n id\n } = field;\n allIds.push(id);\n switch (field.type) {\n case \"text\":\n {\n const value = field.defaultValue || \"\";\n storage.setValue(id, {\n value\n });\n break;\n }\n case \"checkbox\":\n case \"radiobutton\":\n {\n const value = field.defaultValue === field.exportValues;\n storage.setValue(id, {\n value\n });\n break;\n }\n case \"combobox\":\n case \"listbox\":\n {\n const value = field.defaultValue || \"\";\n storage.setValue(id, {\n value\n });\n break;\n }\n default:\n continue;\n }\n const domElement = document.querySelector(`[data-element-id=\"${id}\"]`);\n if (!domElement) {\n continue;\n } else if (!GetElementsByNameSet.has(domElement)) {\n warn(`_bindResetFormAction - element not allowed: ${id}`);\n continue;\n }\n domElement.dispatchEvent(new Event(\"resetform\"));\n }\n if (this.enableScripting) {\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id: \"app\",\n ids: allIds,\n name: \"ResetForm\"\n }\n });\n }\n return false;\n };\n }\n}\nclass TextAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true\n });\n }\n render() {\n this.container.classList.add(\"textAnnotation\");\n const image = document.createElement(\"img\");\n image.src = this.imageResourcesPath + \"annotation-\" + this.data.name.toLowerCase() + \".svg\";\n image.setAttribute(\"data-l10n-id\", \"pdfjs-text-annotation-type\");\n image.setAttribute(\"data-l10n-args\", JSON.stringify({\n type: this.data.name\n }));\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.append(image);\n return this.container;\n }\n}\nclass WidgetAnnotationElement extends AnnotationElement {\n render() {\n return this.container;\n }\n showElementAndHideCanvas(element) {\n if (this.data.hasOwnCanvas) {\n if (element.previousSibling?.nodeName === \"CANVAS\") {\n element.previousSibling.hidden = true;\n }\n element.hidden = false;\n }\n }\n _getKeyModifier(event) {\n return util_FeatureTest.platform.isMac ? event.metaKey : event.ctrlKey;\n }\n _setEventListener(element, elementData, baseName, eventName, valueGetter) {\n if (baseName.includes(\"mouse\")) {\n element.addEventListener(baseName, event => {\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id: this.data.id,\n name: eventName,\n value: valueGetter(event),\n shift: event.shiftKey,\n modifier: this._getKeyModifier(event)\n }\n });\n });\n } else {\n element.addEventListener(baseName, event => {\n if (baseName === \"blur\") {\n if (!elementData.focused || !event.relatedTarget) {\n return;\n }\n elementData.focused = false;\n } else if (baseName === \"focus\") {\n if (elementData.focused) {\n return;\n }\n elementData.focused = true;\n }\n if (!valueGetter) {\n return;\n }\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id: this.data.id,\n name: eventName,\n value: valueGetter(event)\n }\n });\n });\n }\n }\n _setEventListeners(element, elementData, names, getter) {\n for (const [baseName, eventName] of names) {\n if (eventName === \"Action\" || this.data.actions?.[eventName]) {\n if (eventName === \"Focus\" || eventName === \"Blur\") {\n elementData ||= {\n focused: false\n };\n }\n this._setEventListener(element, elementData, baseName, eventName, getter);\n if (eventName === \"Focus\" && !this.data.actions?.Blur) {\n this._setEventListener(element, elementData, \"blur\", \"Blur\", null);\n } else if (eventName === \"Blur\" && !this.data.actions?.Focus) {\n this._setEventListener(element, elementData, \"focus\", \"Focus\", null);\n }\n }\n }\n }\n _setBackgroundColor(element) {\n const color = this.data.backgroundColor || null;\n element.style.backgroundColor = color === null ? \"transparent\" : Util.makeHexColor(color[0], color[1], color[2]);\n }\n _setTextStyle(element) {\n const TEXT_ALIGNMENT = [\"left\", \"center\", \"right\"];\n const {\n fontColor\n } = this.data.defaultAppearanceData;\n const fontSize = this.data.defaultAppearanceData.fontSize || annotation_layer_DEFAULT_FONT_SIZE;\n const style = element.style;\n let computedFontSize;\n const BORDER_SIZE = 2;\n const roundToOneDecimal = x => Math.round(10 * x) / 10;\n if (this.data.multiLine) {\n const height = Math.abs(this.data.rect[3] - this.data.rect[1] - BORDER_SIZE);\n const numberOfLines = Math.round(height / (LINE_FACTOR * fontSize)) || 1;\n const lineHeight = height / numberOfLines;\n computedFontSize = Math.min(fontSize, roundToOneDecimal(lineHeight / LINE_FACTOR));\n } else {\n const height = Math.abs(this.data.rect[3] - this.data.rect[1] - BORDER_SIZE);\n computedFontSize = Math.min(fontSize, roundToOneDecimal(height / LINE_FACTOR));\n }\n style.fontSize = `calc(${computedFontSize}px * var(--scale-factor))`;\n style.color = Util.makeHexColor(fontColor[0], fontColor[1], fontColor[2]);\n if (this.data.textAlignment !== null) {\n style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];\n }\n }\n _setRequired(element, isRequired) {\n if (isRequired) {\n element.setAttribute(\"required\", true);\n } else {\n element.removeAttribute(\"required\");\n }\n element.setAttribute(\"aria-required\", isRequired);\n }\n}\nclass TextWidgetAnnotationElement extends WidgetAnnotationElement {\n constructor(parameters) {\n const isRenderable = parameters.renderForms || parameters.data.hasOwnCanvas || !parameters.data.hasAppearance && !!parameters.data.fieldValue;\n super(parameters, {\n isRenderable\n });\n }\n setPropertyOnSiblings(base, key, value, keyInStorage) {\n const storage = this.annotationStorage;\n for (const element of this._getElementsByName(base.name, base.id)) {\n if (element.domElement) {\n element.domElement[key] = value;\n }\n storage.setValue(element.id, {\n [keyInStorage]: value\n });\n }\n }\n render() {\n const storage = this.annotationStorage;\n const id = this.data.id;\n this.container.classList.add(\"textWidgetAnnotation\");\n let element = null;\n if (this.renderForms) {\n const storedData = storage.getValue(id, {\n value: this.data.fieldValue\n });\n let textContent = storedData.value || \"\";\n const maxLen = storage.getValue(id, {\n charLimit: this.data.maxLen\n }).charLimit;\n if (maxLen && textContent.length > maxLen) {\n textContent = textContent.slice(0, maxLen);\n }\n let fieldFormattedValues = storedData.formattedValue || this.data.textContent?.join(\"\\n\") || null;\n if (fieldFormattedValues && this.data.comb) {\n fieldFormattedValues = fieldFormattedValues.replaceAll(/\\s+/g, \"\");\n }\n const elementData = {\n userValue: textContent,\n formattedValue: fieldFormattedValues,\n lastCommittedValue: null,\n commitKey: 1,\n focused: false\n };\n if (this.data.multiLine) {\n element = document.createElement(\"textarea\");\n element.textContent = fieldFormattedValues ?? textContent;\n if (this.data.doNotScroll) {\n element.style.overflowY = \"hidden\";\n }\n } else {\n element = document.createElement(\"input\");\n element.type = \"text\";\n element.setAttribute(\"value\", fieldFormattedValues ?? textContent);\n if (this.data.doNotScroll) {\n element.style.overflowX = \"hidden\";\n }\n }\n if (this.data.hasOwnCanvas) {\n element.hidden = true;\n }\n GetElementsByNameSet.add(element);\n element.setAttribute(\"data-element-id\", id);\n element.disabled = this.data.readOnly;\n element.name = this.data.fieldName;\n element.tabIndex = DEFAULT_TAB_INDEX;\n this._setRequired(element, this.data.required);\n if (maxLen) {\n element.maxLength = maxLen;\n }\n element.addEventListener(\"input\", event => {\n storage.setValue(id, {\n value: event.target.value\n });\n this.setPropertyOnSiblings(element, \"value\", event.target.value, \"value\");\n elementData.formattedValue = null;\n });\n element.addEventListener(\"resetform\", event => {\n const defaultValue = this.data.defaultFieldValue ?? \"\";\n element.value = elementData.userValue = defaultValue;\n elementData.formattedValue = null;\n });\n let blurListener = event => {\n const {\n formattedValue\n } = elementData;\n if (formattedValue !== null && formattedValue !== undefined) {\n event.target.value = formattedValue;\n }\n event.target.scrollLeft = 0;\n };\n if (this.enableScripting && this.hasJSActions) {\n element.addEventListener(\"focus\", event => {\n if (elementData.focused) {\n return;\n }\n const {\n target\n } = event;\n if (elementData.userValue) {\n target.value = elementData.userValue;\n }\n elementData.lastCommittedValue = target.value;\n elementData.commitKey = 1;\n if (!this.data.actions?.Focus) {\n elementData.focused = true;\n }\n });\n element.addEventListener(\"updatefromsandbox\", jsEvent => {\n this.showElementAndHideCanvas(jsEvent.target);\n const actions = {\n value(event) {\n elementData.userValue = event.detail.value ?? \"\";\n storage.setValue(id, {\n value: elementData.userValue.toString()\n });\n event.target.value = elementData.userValue;\n },\n formattedValue(event) {\n const {\n formattedValue\n } = event.detail;\n elementData.formattedValue = formattedValue;\n if (formattedValue !== null && formattedValue !== undefined && event.target !== document.activeElement) {\n event.target.value = formattedValue;\n }\n storage.setValue(id, {\n formattedValue\n });\n },\n selRange(event) {\n event.target.setSelectionRange(...event.detail.selRange);\n },\n charLimit: event => {\n const {\n charLimit\n } = event.detail;\n const {\n target\n } = event;\n if (charLimit === 0) {\n target.removeAttribute(\"maxLength\");\n return;\n }\n target.setAttribute(\"maxLength\", charLimit);\n let value = elementData.userValue;\n if (!value || value.length <= charLimit) {\n return;\n }\n value = value.slice(0, charLimit);\n target.value = elementData.userValue = value;\n storage.setValue(id, {\n value\n });\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id,\n name: \"Keystroke\",\n value,\n willCommit: true,\n commitKey: 1,\n selStart: target.selectionStart,\n selEnd: target.selectionEnd\n }\n });\n }\n };\n this._dispatchEventFromSandbox(actions, jsEvent);\n });\n element.addEventListener(\"keydown\", event => {\n elementData.commitKey = 1;\n let commitKey = -1;\n if (event.key === \"Escape\") {\n commitKey = 0;\n } else if (event.key === \"Enter\" && !this.data.multiLine) {\n commitKey = 2;\n } else if (event.key === \"Tab\") {\n elementData.commitKey = 3;\n }\n if (commitKey === -1) {\n return;\n }\n const {\n value\n } = event.target;\n if (elementData.lastCommittedValue === value) {\n return;\n }\n elementData.lastCommittedValue = value;\n elementData.userValue = value;\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id,\n name: \"Keystroke\",\n value,\n willCommit: true,\n commitKey,\n selStart: event.target.selectionStart,\n selEnd: event.target.selectionEnd\n }\n });\n });\n const _blurListener = blurListener;\n blurListener = null;\n element.addEventListener(\"blur\", event => {\n if (!elementData.focused || !event.relatedTarget) {\n return;\n }\n if (!this.data.actions?.Blur) {\n elementData.focused = false;\n }\n const {\n value\n } = event.target;\n elementData.userValue = value;\n if (elementData.lastCommittedValue !== value) {\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id,\n name: \"Keystroke\",\n value,\n willCommit: true,\n commitKey: elementData.commitKey,\n selStart: event.target.selectionStart,\n selEnd: event.target.selectionEnd\n }\n });\n }\n _blurListener(event);\n });\n if (this.data.actions?.Keystroke) {\n element.addEventListener(\"beforeinput\", event => {\n elementData.lastCommittedValue = null;\n const {\n data,\n target\n } = event;\n const {\n value,\n selectionStart,\n selectionEnd\n } = target;\n let selStart = selectionStart,\n selEnd = selectionEnd;\n switch (event.inputType) {\n case \"deleteWordBackward\":\n {\n const match = value.substring(0, selectionStart).match(/\\w*[^\\w]*$/);\n if (match) {\n selStart -= match[0].length;\n }\n break;\n }\n case \"deleteWordForward\":\n {\n const match = value.substring(selectionStart).match(/^[^\\w]*\\w*/);\n if (match) {\n selEnd += match[0].length;\n }\n break;\n }\n case \"deleteContentBackward\":\n if (selectionStart === selectionEnd) {\n selStart -= 1;\n }\n break;\n case \"deleteContentForward\":\n if (selectionStart === selectionEnd) {\n selEnd += 1;\n }\n break;\n }\n event.preventDefault();\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id,\n name: \"Keystroke\",\n value,\n change: data || \"\",\n willCommit: false,\n selStart,\n selEnd\n }\n });\n });\n }\n this._setEventListeners(element, elementData, [[\"focus\", \"Focus\"], [\"blur\", \"Blur\"], [\"mousedown\", \"Mouse Down\"], [\"mouseenter\", \"Mouse Enter\"], [\"mouseleave\", \"Mouse Exit\"], [\"mouseup\", \"Mouse Up\"]], event => event.target.value);\n }\n if (blurListener) {\n element.addEventListener(\"blur\", blurListener);\n }\n if (this.data.comb) {\n const fieldWidth = this.data.rect[2] - this.data.rect[0];\n const combWidth = fieldWidth / maxLen;\n element.classList.add(\"comb\");\n element.style.letterSpacing = `calc(${combWidth}px * var(--scale-factor) - 1ch)`;\n }\n } else {\n element = document.createElement(\"div\");\n element.textContent = this.data.fieldValue;\n element.style.verticalAlign = \"middle\";\n element.style.display = \"table-cell\";\n if (this.data.hasOwnCanvas) {\n element.hidden = true;\n }\n }\n this._setTextStyle(element);\n this._setBackgroundColor(element);\n this._setDefaultPropertiesFromJS(element);\n this.container.append(element);\n return this.container;\n }\n}\nclass SignatureWidgetAnnotationElement extends WidgetAnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: !!parameters.data.hasOwnCanvas\n });\n }\n}\nclass CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: parameters.renderForms\n });\n }\n render() {\n const storage = this.annotationStorage;\n const data = this.data;\n const id = data.id;\n let value = storage.getValue(id, {\n value: data.exportValue === data.fieldValue\n }).value;\n if (typeof value === \"string\") {\n value = value !== \"Off\";\n storage.setValue(id, {\n value\n });\n }\n this.container.classList.add(\"buttonWidgetAnnotation\", \"checkBox\");\n const element = document.createElement(\"input\");\n GetElementsByNameSet.add(element);\n element.setAttribute(\"data-element-id\", id);\n element.disabled = data.readOnly;\n this._setRequired(element, this.data.required);\n element.type = \"checkbox\";\n element.name = data.fieldName;\n if (value) {\n element.setAttribute(\"checked\", true);\n }\n element.setAttribute(\"exportValue\", data.exportValue);\n element.tabIndex = DEFAULT_TAB_INDEX;\n element.addEventListener(\"change\", event => {\n const {\n name,\n checked\n } = event.target;\n for (const checkbox of this._getElementsByName(name, id)) {\n const curChecked = checked && checkbox.exportValue === data.exportValue;\n if (checkbox.domElement) {\n checkbox.domElement.checked = curChecked;\n }\n storage.setValue(checkbox.id, {\n value: curChecked\n });\n }\n storage.setValue(id, {\n value: checked\n });\n });\n element.addEventListener(\"resetform\", event => {\n const defaultValue = data.defaultFieldValue || \"Off\";\n event.target.checked = defaultValue === data.exportValue;\n });\n if (this.enableScripting && this.hasJSActions) {\n element.addEventListener(\"updatefromsandbox\", jsEvent => {\n const actions = {\n value(event) {\n event.target.checked = event.detail.value !== \"Off\";\n storage.setValue(id, {\n value: event.target.checked\n });\n }\n };\n this._dispatchEventFromSandbox(actions, jsEvent);\n });\n this._setEventListeners(element, null, [[\"change\", \"Validate\"], [\"change\", \"Action\"], [\"focus\", \"Focus\"], [\"blur\", \"Blur\"], [\"mousedown\", \"Mouse Down\"], [\"mouseenter\", \"Mouse Enter\"], [\"mouseleave\", \"Mouse Exit\"], [\"mouseup\", \"Mouse Up\"]], event => event.target.checked);\n }\n this._setBackgroundColor(element);\n this._setDefaultPropertiesFromJS(element);\n this.container.append(element);\n return this.container;\n }\n}\nclass RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: parameters.renderForms\n });\n }\n render() {\n this.container.classList.add(\"buttonWidgetAnnotation\", \"radioButton\");\n const storage = this.annotationStorage;\n const data = this.data;\n const id = data.id;\n let value = storage.getValue(id, {\n value: data.fieldValue === data.buttonValue\n }).value;\n if (typeof value === \"string\") {\n value = value !== data.buttonValue;\n storage.setValue(id, {\n value\n });\n }\n if (value) {\n for (const radio of this._getElementsByName(data.fieldName, id)) {\n storage.setValue(radio.id, {\n value: false\n });\n }\n }\n const element = document.createElement(\"input\");\n GetElementsByNameSet.add(element);\n element.setAttribute(\"data-element-id\", id);\n element.disabled = data.readOnly;\n this._setRequired(element, this.data.required);\n element.type = \"radio\";\n element.name = data.fieldName;\n if (value) {\n element.setAttribute(\"checked\", true);\n }\n element.tabIndex = DEFAULT_TAB_INDEX;\n element.addEventListener(\"change\", event => {\n const {\n name,\n checked\n } = event.target;\n for (const radio of this._getElementsByName(name, id)) {\n storage.setValue(radio.id, {\n value: false\n });\n }\n storage.setValue(id, {\n value: checked\n });\n });\n element.addEventListener(\"resetform\", event => {\n const defaultValue = data.defaultFieldValue;\n event.target.checked = defaultValue !== null && defaultValue !== undefined && defaultValue === data.buttonValue;\n });\n if (this.enableScripting && this.hasJSActions) {\n const pdfButtonValue = data.buttonValue;\n element.addEventListener(\"updatefromsandbox\", jsEvent => {\n const actions = {\n value: event => {\n const checked = pdfButtonValue === event.detail.value;\n for (const radio of this._getElementsByName(event.target.name)) {\n const curChecked = checked && radio.id === id;\n if (radio.domElement) {\n radio.domElement.checked = curChecked;\n }\n storage.setValue(radio.id, {\n value: curChecked\n });\n }\n }\n };\n this._dispatchEventFromSandbox(actions, jsEvent);\n });\n this._setEventListeners(element, null, [[\"change\", \"Validate\"], [\"change\", \"Action\"], [\"focus\", \"Focus\"], [\"blur\", \"Blur\"], [\"mousedown\", \"Mouse Down\"], [\"mouseenter\", \"Mouse Enter\"], [\"mouseleave\", \"Mouse Exit\"], [\"mouseup\", \"Mouse Up\"]], event => event.target.checked);\n }\n this._setBackgroundColor(element);\n this._setDefaultPropertiesFromJS(element);\n this.container.append(element);\n return this.container;\n }\n}\nclass PushButtonWidgetAnnotationElement extends LinkAnnotationElement {\n constructor(parameters) {\n super(parameters, {\n ignoreBorder: parameters.data.hasAppearance\n });\n }\n render() {\n const container = super.render();\n container.classList.add(\"buttonWidgetAnnotation\", \"pushButton\");\n const linkElement = container.lastChild;\n if (this.enableScripting && this.hasJSActions && linkElement) {\n this._setDefaultPropertiesFromJS(linkElement);\n linkElement.addEventListener(\"updatefromsandbox\", jsEvent => {\n this._dispatchEventFromSandbox({}, jsEvent);\n });\n }\n return container;\n }\n}\nclass ChoiceWidgetAnnotationElement extends WidgetAnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: parameters.renderForms\n });\n }\n render() {\n this.container.classList.add(\"choiceWidgetAnnotation\");\n const storage = this.annotationStorage;\n const id = this.data.id;\n const storedData = storage.getValue(id, {\n value: this.data.fieldValue\n });\n const selectElement = document.createElement(\"select\");\n GetElementsByNameSet.add(selectElement);\n selectElement.setAttribute(\"data-element-id\", id);\n selectElement.disabled = this.data.readOnly;\n this._setRequired(selectElement, this.data.required);\n selectElement.name = this.data.fieldName;\n selectElement.tabIndex = DEFAULT_TAB_INDEX;\n let addAnEmptyEntry = this.data.combo && this.data.options.length > 0;\n if (!this.data.combo) {\n selectElement.size = this.data.options.length;\n if (this.data.multiSelect) {\n selectElement.multiple = true;\n }\n }\n selectElement.addEventListener(\"resetform\", event => {\n const defaultValue = this.data.defaultFieldValue;\n for (const option of selectElement.options) {\n option.selected = option.value === defaultValue;\n }\n });\n for (const option of this.data.options) {\n const optionElement = document.createElement(\"option\");\n optionElement.textContent = option.displayValue;\n optionElement.value = option.exportValue;\n if (storedData.value.includes(option.exportValue)) {\n optionElement.setAttribute(\"selected\", true);\n addAnEmptyEntry = false;\n }\n selectElement.append(optionElement);\n }\n let removeEmptyEntry = null;\n if (addAnEmptyEntry) {\n const noneOptionElement = document.createElement(\"option\");\n noneOptionElement.value = \" \";\n noneOptionElement.setAttribute(\"hidden\", true);\n noneOptionElement.setAttribute(\"selected\", true);\n selectElement.prepend(noneOptionElement);\n removeEmptyEntry = () => {\n noneOptionElement.remove();\n selectElement.removeEventListener(\"input\", removeEmptyEntry);\n removeEmptyEntry = null;\n };\n selectElement.addEventListener(\"input\", removeEmptyEntry);\n }\n const getValue = isExport => {\n const name = isExport ? \"value\" : \"textContent\";\n const {\n options,\n multiple\n } = selectElement;\n if (!multiple) {\n return options.selectedIndex === -1 ? null : options[options.selectedIndex][name];\n }\n return Array.prototype.filter.call(options, option => option.selected).map(option => option[name]);\n };\n let selectedValues = getValue(false);\n const getItems = event => {\n const options = event.target.options;\n return Array.prototype.map.call(options, option => ({\n displayValue: option.textContent,\n exportValue: option.value\n }));\n };\n if (this.enableScripting && this.hasJSActions) {\n selectElement.addEventListener(\"updatefromsandbox\", jsEvent => {\n const actions = {\n value(event) {\n removeEmptyEntry?.();\n const value = event.detail.value;\n const values = new Set(Array.isArray(value) ? value : [value]);\n for (const option of selectElement.options) {\n option.selected = values.has(option.value);\n }\n storage.setValue(id, {\n value: getValue(true)\n });\n selectedValues = getValue(false);\n },\n multipleSelection(event) {\n selectElement.multiple = true;\n },\n remove(event) {\n const options = selectElement.options;\n const index = event.detail.remove;\n options[index].selected = false;\n selectElement.remove(index);\n if (options.length > 0) {\n const i = Array.prototype.findIndex.call(options, option => option.selected);\n if (i === -1) {\n options[0].selected = true;\n }\n }\n storage.setValue(id, {\n value: getValue(true),\n items: getItems(event)\n });\n selectedValues = getValue(false);\n },\n clear(event) {\n while (selectElement.length !== 0) {\n selectElement.remove(0);\n }\n storage.setValue(id, {\n value: null,\n items: []\n });\n selectedValues = getValue(false);\n },\n insert(event) {\n const {\n index,\n displayValue,\n exportValue\n } = event.detail.insert;\n const selectChild = selectElement.children[index];\n const optionElement = document.createElement(\"option\");\n optionElement.textContent = displayValue;\n optionElement.value = exportValue;\n if (selectChild) {\n selectChild.before(optionElement);\n } else {\n selectElement.append(optionElement);\n }\n storage.setValue(id, {\n value: getValue(true),\n items: getItems(event)\n });\n selectedValues = getValue(false);\n },\n items(event) {\n const {\n items\n } = event.detail;\n while (selectElement.length !== 0) {\n selectElement.remove(0);\n }\n for (const item of items) {\n const {\n displayValue,\n exportValue\n } = item;\n const optionElement = document.createElement(\"option\");\n optionElement.textContent = displayValue;\n optionElement.value = exportValue;\n selectElement.append(optionElement);\n }\n if (selectElement.options.length > 0) {\n selectElement.options[0].selected = true;\n }\n storage.setValue(id, {\n value: getValue(true),\n items: getItems(event)\n });\n selectedValues = getValue(false);\n },\n indices(event) {\n const indices = new Set(event.detail.indices);\n for (const option of event.target.options) {\n option.selected = indices.has(option.index);\n }\n storage.setValue(id, {\n value: getValue(true)\n });\n selectedValues = getValue(false);\n },\n editable(event) {\n event.target.disabled = !event.detail.editable;\n }\n };\n this._dispatchEventFromSandbox(actions, jsEvent);\n });\n selectElement.addEventListener(\"input\", event => {\n const exportValue = getValue(true);\n const change = getValue(false);\n storage.setValue(id, {\n value: exportValue\n });\n event.preventDefault();\n this.linkService.eventBus?.dispatch(\"dispatcheventinsandbox\", {\n source: this,\n detail: {\n id,\n name: \"Keystroke\",\n value: selectedValues,\n change,\n changeEx: exportValue,\n willCommit: false,\n commitKey: 1,\n keyDown: false\n }\n });\n });\n this._setEventListeners(selectElement, null, [[\"focus\", \"Focus\"], [\"blur\", \"Blur\"], [\"mousedown\", \"Mouse Down\"], [\"mouseenter\", \"Mouse Enter\"], [\"mouseleave\", \"Mouse Exit\"], [\"mouseup\", \"Mouse Up\"], [\"input\", \"Action\"], [\"input\", \"Validate\"]], event => event.target.value);\n } else {\n selectElement.addEventListener(\"input\", function (event) {\n storage.setValue(id, {\n value: getValue(true)\n });\n });\n }\n if (this.data.combo) {\n this._setTextStyle(selectElement);\n } else {}\n this._setBackgroundColor(selectElement);\n this._setDefaultPropertiesFromJS(selectElement);\n this.container.append(selectElement);\n return this.container;\n }\n}\nclass PopupAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n const {\n data,\n elements\n } = parameters;\n super(parameters, {\n isRenderable: AnnotationElement._hasPopupData(data)\n });\n this.elements = elements;\n this.popup = null;\n }\n render() {\n this.container.classList.add(\"popupAnnotation\");\n const popup = this.popup = new PopupElement({\n container: this.container,\n color: this.data.color,\n titleObj: this.data.titleObj,\n modificationDate: this.data.modificationDate,\n contentsObj: this.data.contentsObj,\n richText: this.data.richText,\n rect: this.data.rect,\n parentRect: this.data.parentRect || null,\n parent: this.parent,\n elements: this.elements,\n open: this.data.open\n });\n const elementIds = [];\n for (const element of this.elements) {\n element.popup = popup;\n element.container.ariaHasPopup = \"dialog\";\n elementIds.push(element.data.id);\n element.addHighlightArea();\n }\n this.container.setAttribute(\"aria-controls\", elementIds.map(id => `${AnnotationPrefix}${id}`).join(\",\"));\n return this.container;\n }\n}\nclass PopupElement {\n #boundKeyDown = this.#keyDown.bind(this);\n #boundHide = this.#hide.bind(this);\n #boundShow = this.#show.bind(this);\n #boundToggle = this.#toggle.bind(this);\n #color = null;\n #container = null;\n #contentsObj = null;\n #dateObj = null;\n #elements = null;\n #parent = null;\n #parentRect = null;\n #pinned = false;\n #popup = null;\n #position = null;\n #rect = null;\n #richText = null;\n #titleObj = null;\n #updates = null;\n #wasVisible = false;\n constructor({\n container,\n color,\n elements,\n titleObj,\n modificationDate,\n contentsObj,\n richText,\n parent,\n rect,\n parentRect,\n open\n }) {\n this.#container = container;\n this.#titleObj = titleObj;\n this.#contentsObj = contentsObj;\n this.#richText = richText;\n this.#parent = parent;\n this.#color = color;\n this.#rect = rect;\n this.#parentRect = parentRect;\n this.#elements = elements;\n this.#dateObj = PDFDateString.toDateObject(modificationDate);\n this.trigger = elements.flatMap(e => e.getElementsToTriggerPopup());\n for (const element of this.trigger) {\n element.addEventListener(\"click\", this.#boundToggle);\n element.addEventListener(\"mouseenter\", this.#boundShow);\n element.addEventListener(\"mouseleave\", this.#boundHide);\n element.classList.add(\"popupTriggerArea\");\n }\n for (const element of elements) {\n element.container?.addEventListener(\"keydown\", this.#boundKeyDown);\n }\n this.#container.hidden = true;\n if (open) {\n this.#toggle();\n }\n }\n render() {\n if (this.#popup) {\n return;\n }\n const popup = this.#popup = document.createElement(\"div\");\n popup.className = \"popup\";\n if (this.#color) {\n const baseColor = popup.style.outlineColor = Util.makeHexColor(...this.#color);\n if (CSS.supports(\"background-color\", \"color-mix(in srgb, red 30%, white)\")) {\n popup.style.backgroundColor = `color-mix(in srgb, ${baseColor} 30%, white)`;\n } else {\n const BACKGROUND_ENLIGHT = 0.7;\n popup.style.backgroundColor = Util.makeHexColor(...this.#color.map(c => Math.floor(BACKGROUND_ENLIGHT * (255 - c) + c)));\n }\n }\n const header = document.createElement(\"span\");\n header.className = \"header\";\n const title = document.createElement(\"h1\");\n header.append(title);\n ({\n dir: title.dir,\n str: title.textContent\n } = this.#titleObj);\n popup.append(header);\n if (this.#dateObj) {\n const modificationDate = document.createElement(\"span\");\n modificationDate.classList.add(\"popupDate\");\n modificationDate.setAttribute(\"data-l10n-id\", \"pdfjs-annotation-date-time-string\");\n modificationDate.setAttribute(\"data-l10n-args\", JSON.stringify({\n dateObj: this.#dateObj.valueOf()\n }));\n header.append(modificationDate);\n }\n const html = this.#html;\n if (html) {\n XfaLayer.render({\n xfaHtml: html,\n intent: \"richText\",\n div: popup\n });\n popup.lastChild.classList.add(\"richText\", \"popupContent\");\n } else {\n const contents = this._formatContents(this.#contentsObj);\n popup.append(contents);\n }\n this.#container.append(popup);\n }\n get #html() {\n const richText = this.#richText;\n const contentsObj = this.#contentsObj;\n if (richText?.str && (!contentsObj?.str || contentsObj.str === richText.str)) {\n return this.#richText.html || null;\n }\n return null;\n }\n get #fontSize() {\n return this.#html?.attributes?.style?.fontSize || 0;\n }\n get #fontColor() {\n return this.#html?.attributes?.style?.color || null;\n }\n #makePopupContent(text) {\n const popupLines = [];\n const popupContent = {\n str: text,\n html: {\n name: \"div\",\n attributes: {\n dir: \"auto\"\n },\n children: [{\n name: \"p\",\n children: popupLines\n }]\n }\n };\n const lineAttributes = {\n style: {\n color: this.#fontColor,\n fontSize: this.#fontSize ? `calc(${this.#fontSize}px * var(--scale-factor))` : \"\"\n }\n };\n for (const line of text.split(\"\\n\")) {\n popupLines.push({\n name: \"span\",\n value: line,\n attributes: lineAttributes\n });\n }\n return popupContent;\n }\n _formatContents({\n str,\n dir\n }) {\n const p = document.createElement(\"p\");\n p.classList.add(\"popupContent\");\n p.dir = dir;\n const lines = str.split(/(?:\\r\\n?|\\n)/);\n for (let i = 0, ii = lines.length; i < ii; ++i) {\n const line = lines[i];\n p.append(document.createTextNode(line));\n if (i < ii - 1) {\n p.append(document.createElement(\"br\"));\n }\n }\n return p;\n }\n #keyDown(event) {\n if (event.altKey || event.shiftKey || event.ctrlKey || event.metaKey) {\n return;\n }\n if (event.key === \"Enter\" || event.key === \"Escape\" && this.#pinned) {\n this.#toggle();\n }\n }\n updateEdited({\n rect,\n popupContent\n }) {\n this.#updates ||= {\n contentsObj: this.#contentsObj,\n richText: this.#richText\n };\n if (rect) {\n this.#position = null;\n }\n if (popupContent) {\n this.#richText = this.#makePopupContent(popupContent);\n this.#contentsObj = null;\n }\n this.#popup?.remove();\n this.#popup = null;\n }\n resetEdited() {\n if (!this.#updates) {\n return;\n }\n ({\n contentsObj: this.#contentsObj,\n richText: this.#richText\n } = this.#updates);\n this.#updates = null;\n this.#popup?.remove();\n this.#popup = null;\n this.#position = null;\n }\n #setPosition() {\n if (this.#position !== null) {\n return;\n }\n const {\n page: {\n view\n },\n viewport: {\n rawDims: {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n }\n }\n } = this.#parent;\n let useParentRect = !!this.#parentRect;\n let rect = useParentRect ? this.#parentRect : this.#rect;\n for (const element of this.#elements) {\n if (!rect || Util.intersect(element.data.rect, rect) !== null) {\n rect = element.data.rect;\n useParentRect = true;\n break;\n }\n }\n const normalizedRect = Util.normalizeRect([rect[0], view[3] - rect[1] + view[1], rect[2], view[3] - rect[3] + view[1]]);\n const HORIZONTAL_SPACE_AFTER_ANNOTATION = 5;\n const parentWidth = useParentRect ? rect[2] - rect[0] + HORIZONTAL_SPACE_AFTER_ANNOTATION : 0;\n const popupLeft = normalizedRect[0] + parentWidth;\n const popupTop = normalizedRect[1];\n this.#position = [100 * (popupLeft - pageX) / pageWidth, 100 * (popupTop - pageY) / pageHeight];\n const {\n style\n } = this.#container;\n style.left = `${this.#position[0]}%`;\n style.top = `${this.#position[1]}%`;\n }\n #toggle() {\n this.#pinned = !this.#pinned;\n if (this.#pinned) {\n this.#show();\n this.#container.addEventListener(\"click\", this.#boundToggle);\n this.#container.addEventListener(\"keydown\", this.#boundKeyDown);\n } else {\n this.#hide();\n this.#container.removeEventListener(\"click\", this.#boundToggle);\n this.#container.removeEventListener(\"keydown\", this.#boundKeyDown);\n }\n }\n #show() {\n if (!this.#popup) {\n this.render();\n }\n if (!this.isVisible) {\n this.#setPosition();\n this.#container.hidden = false;\n this.#container.style.zIndex = parseInt(this.#container.style.zIndex) + 1000;\n } else if (this.#pinned) {\n this.#container.classList.add(\"focused\");\n }\n }\n #hide() {\n this.#container.classList.remove(\"focused\");\n if (this.#pinned || !this.isVisible) {\n return;\n }\n this.#container.hidden = true;\n this.#container.style.zIndex = parseInt(this.#container.style.zIndex) - 1000;\n }\n forceHide() {\n this.#wasVisible = this.isVisible;\n if (!this.#wasVisible) {\n return;\n }\n this.#container.hidden = true;\n }\n maybeShow() {\n if (!this.#wasVisible) {\n return;\n }\n if (!this.#popup) {\n this.#show();\n }\n this.#wasVisible = false;\n this.#container.hidden = false;\n }\n get isVisible() {\n return this.#container.hidden === false;\n }\n}\nclass FreeTextAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n this.textContent = parameters.data.textContent;\n this.textPosition = parameters.data.textPosition;\n this.annotationEditorType = AnnotationEditorType.FREETEXT;\n }\n render() {\n this.container.classList.add(\"freeTextAnnotation\");\n if (this.textContent) {\n const content = document.createElement(\"div\");\n content.classList.add(\"annotationTextContent\");\n content.setAttribute(\"role\", \"comment\");\n for (const line of this.textContent) {\n const lineSpan = document.createElement(\"span\");\n lineSpan.textContent = line;\n content.append(lineSpan);\n }\n this.container.append(content);\n }\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this._editOnDoubleClick();\n return this.container;\n }\n}\nclass LineAnnotationElement extends AnnotationElement {\n #line = null;\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n }\n render() {\n this.container.classList.add(\"lineAnnotation\");\n const data = this.data;\n const {\n width,\n height\n } = getRectDims(data.rect);\n const svg = this.svgFactory.create(width, height, true);\n const line = this.#line = this.svgFactory.createElement(\"svg:line\");\n line.setAttribute(\"x1\", data.rect[2] - data.lineCoordinates[0]);\n line.setAttribute(\"y1\", data.rect[3] - data.lineCoordinates[1]);\n line.setAttribute(\"x2\", data.rect[2] - data.lineCoordinates[2]);\n line.setAttribute(\"y2\", data.rect[3] - data.lineCoordinates[3]);\n line.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n line.setAttribute(\"stroke\", \"transparent\");\n line.setAttribute(\"fill\", \"transparent\");\n svg.append(line);\n this.container.append(svg);\n if (!data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n return this.container;\n }\n getElementsToTriggerPopup() {\n return this.#line;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n}\nclass SquareAnnotationElement extends AnnotationElement {\n #square = null;\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n }\n render() {\n this.container.classList.add(\"squareAnnotation\");\n const data = this.data;\n const {\n width,\n height\n } = getRectDims(data.rect);\n const svg = this.svgFactory.create(width, height, true);\n const borderWidth = data.borderStyle.width;\n const square = this.#square = this.svgFactory.createElement(\"svg:rect\");\n square.setAttribute(\"x\", borderWidth / 2);\n square.setAttribute(\"y\", borderWidth / 2);\n square.setAttribute(\"width\", width - borderWidth);\n square.setAttribute(\"height\", height - borderWidth);\n square.setAttribute(\"stroke-width\", borderWidth || 1);\n square.setAttribute(\"stroke\", \"transparent\");\n square.setAttribute(\"fill\", \"transparent\");\n svg.append(square);\n this.container.append(svg);\n if (!data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n return this.container;\n }\n getElementsToTriggerPopup() {\n return this.#square;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n}\nclass CircleAnnotationElement extends AnnotationElement {\n #circle = null;\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n }\n render() {\n this.container.classList.add(\"circleAnnotation\");\n const data = this.data;\n const {\n width,\n height\n } = getRectDims(data.rect);\n const svg = this.svgFactory.create(width, height, true);\n const borderWidth = data.borderStyle.width;\n const circle = this.#circle = this.svgFactory.createElement(\"svg:ellipse\");\n circle.setAttribute(\"cx\", width / 2);\n circle.setAttribute(\"cy\", height / 2);\n circle.setAttribute(\"rx\", width / 2 - borderWidth / 2);\n circle.setAttribute(\"ry\", height / 2 - borderWidth / 2);\n circle.setAttribute(\"stroke-width\", borderWidth || 1);\n circle.setAttribute(\"stroke\", \"transparent\");\n circle.setAttribute(\"fill\", \"transparent\");\n svg.append(circle);\n this.container.append(svg);\n if (!data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n return this.container;\n }\n getElementsToTriggerPopup() {\n return this.#circle;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n}\nclass PolylineAnnotationElement extends AnnotationElement {\n #polyline = null;\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n this.containerClassName = \"polylineAnnotation\";\n this.svgElementName = \"svg:polyline\";\n }\n render() {\n this.container.classList.add(this.containerClassName);\n const {\n data: {\n rect,\n vertices,\n borderStyle,\n popupRef\n }\n } = this;\n if (!vertices) {\n return this.container;\n }\n const {\n width,\n height\n } = getRectDims(rect);\n const svg = this.svgFactory.create(width, height, true);\n let points = [];\n for (let i = 0, ii = vertices.length; i < ii; i += 2) {\n const x = vertices[i] - rect[0];\n const y = rect[3] - vertices[i + 1];\n points.push(`${x},${y}`);\n }\n points = points.join(\" \");\n const polyline = this.#polyline = this.svgFactory.createElement(this.svgElementName);\n polyline.setAttribute(\"points\", points);\n polyline.setAttribute(\"stroke-width\", borderStyle.width || 1);\n polyline.setAttribute(\"stroke\", \"transparent\");\n polyline.setAttribute(\"fill\", \"transparent\");\n svg.append(polyline);\n this.container.append(svg);\n if (!popupRef && this.hasPopupData) {\n this._createPopup();\n }\n return this.container;\n }\n getElementsToTriggerPopup() {\n return this.#polyline;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n}\nclass PolygonAnnotationElement extends PolylineAnnotationElement {\n constructor(parameters) {\n super(parameters);\n this.containerClassName = \"polygonAnnotation\";\n this.svgElementName = \"svg:polygon\";\n }\n}\nclass CaretAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n }\n render() {\n this.container.classList.add(\"caretAnnotation\");\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n return this.container;\n }\n}\nclass InkAnnotationElement extends AnnotationElement {\n #polylinesGroupElement = null;\n #polylines = [];\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n this.containerClassName = \"inkAnnotation\";\n this.svgElementName = \"svg:polyline\";\n this.annotationEditorType = this.data.it === \"InkHighlight\" ? AnnotationEditorType.HIGHLIGHT : AnnotationEditorType.INK;\n }\n #getTransform(rotation, rect) {\n switch (rotation) {\n case 90:\n return {\n transform: `rotate(90) translate(${-rect[0]},${rect[1]}) scale(1,-1)`,\n width: rect[3] - rect[1],\n height: rect[2] - rect[0]\n };\n case 180:\n return {\n transform: `rotate(180) translate(${-rect[2]},${rect[1]}) scale(1,-1)`,\n width: rect[2] - rect[0],\n height: rect[3] - rect[1]\n };\n case 270:\n return {\n transform: `rotate(270) translate(${-rect[2]},${rect[3]}) scale(1,-1)`,\n width: rect[3] - rect[1],\n height: rect[2] - rect[0]\n };\n default:\n return {\n transform: `translate(${-rect[0]},${rect[3]}) scale(1,-1)`,\n width: rect[2] - rect[0],\n height: rect[3] - rect[1]\n };\n }\n }\n render() {\n this.container.classList.add(this.containerClassName);\n const {\n data: {\n rect,\n rotation,\n inkLists,\n borderStyle,\n popupRef\n }\n } = this;\n const {\n transform,\n width,\n height\n } = this.#getTransform(rotation, rect);\n const svg = this.svgFactory.create(width, height, true);\n const g = this.#polylinesGroupElement = this.svgFactory.createElement(\"svg:g\");\n svg.append(g);\n g.setAttribute(\"stroke-width\", borderStyle.width || 1);\n g.setAttribute(\"stroke-linecap\", \"round\");\n g.setAttribute(\"stroke-linejoin\", \"round\");\n g.setAttribute(\"stroke-miterlimit\", 10);\n g.setAttribute(\"stroke\", \"transparent\");\n g.setAttribute(\"fill\", \"transparent\");\n g.setAttribute(\"transform\", transform);\n for (let i = 0, ii = inkLists.length; i < ii; i++) {\n const polyline = this.svgFactory.createElement(this.svgElementName);\n this.#polylines.push(polyline);\n polyline.setAttribute(\"points\", inkLists[i].join(\",\"));\n g.append(polyline);\n }\n if (!popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.append(svg);\n this._editOnDoubleClick();\n return this.container;\n }\n updateEdited(params) {\n super.updateEdited(params);\n const {\n thickness,\n points,\n rect\n } = params;\n const g = this.#polylinesGroupElement;\n if (thickness >= 0) {\n g.setAttribute(\"stroke-width\", thickness || 1);\n }\n if (points) {\n for (let i = 0, ii = this.#polylines.length; i < ii; i++) {\n this.#polylines[i].setAttribute(\"points\", points[i].join(\",\"));\n }\n }\n if (rect) {\n const {\n transform,\n width,\n height\n } = this.#getTransform(this.data.rotation, rect);\n const root = g.parentElement;\n root.setAttribute(\"viewBox\", `0 0 ${width} ${height}`);\n g.setAttribute(\"transform\", transform);\n }\n }\n getElementsToTriggerPopup() {\n return this.#polylines;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n}\nclass HighlightAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true,\n createQuadrilaterals: true\n });\n this.annotationEditorType = AnnotationEditorType.HIGHLIGHT;\n }\n render() {\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.classList.add(\"highlightAnnotation\");\n this._editOnDoubleClick();\n return this.container;\n }\n}\nclass UnderlineAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true,\n createQuadrilaterals: true\n });\n }\n render() {\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.classList.add(\"underlineAnnotation\");\n return this.container;\n }\n}\nclass SquigglyAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true,\n createQuadrilaterals: true\n });\n }\n render() {\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.classList.add(\"squigglyAnnotation\");\n return this.container;\n }\n}\nclass StrikeOutAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true,\n createQuadrilaterals: true\n });\n }\n render() {\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this.container.classList.add(\"strikeoutAnnotation\");\n return this.container;\n }\n}\nclass StampAnnotationElement extends AnnotationElement {\n constructor(parameters) {\n super(parameters, {\n isRenderable: true,\n ignoreBorder: true\n });\n this.annotationEditorType = AnnotationEditorType.STAMP;\n }\n render() {\n this.container.classList.add(\"stampAnnotation\");\n this.container.setAttribute(\"role\", \"img\");\n if (!this.data.popupRef && this.hasPopupData) {\n this._createPopup();\n }\n this._editOnDoubleClick();\n return this.container;\n }\n}\nclass FileAttachmentAnnotationElement extends AnnotationElement {\n #trigger = null;\n constructor(parameters) {\n super(parameters, {\n isRenderable: true\n });\n const {\n file\n } = this.data;\n this.filename = file.filename;\n this.content = file.content;\n this.linkService.eventBus?.dispatch(\"fileattachmentannotation\", {\n source: this,\n ...file\n });\n }\n render() {\n this.container.classList.add(\"fileAttachmentAnnotation\");\n const {\n container,\n data\n } = this;\n let trigger;\n if (data.hasAppearance || data.fillAlpha === 0) {\n trigger = document.createElement(\"div\");\n } else {\n trigger = document.createElement(\"img\");\n trigger.src = `${this.imageResourcesPath}annotation-${/paperclip/i.test(data.name) ? \"paperclip\" : \"pushpin\"}.svg`;\n if (data.fillAlpha && data.fillAlpha < 1) {\n trigger.style = `filter: opacity(${Math.round(data.fillAlpha * 100)}%);`;\n }\n }\n trigger.addEventListener(\"dblclick\", this.#download.bind(this));\n this.#trigger = trigger;\n const {\n isMac\n } = util_FeatureTest.platform;\n container.addEventListener(\"keydown\", evt => {\n if (evt.key === \"Enter\" && (isMac ? evt.metaKey : evt.ctrlKey)) {\n this.#download();\n }\n });\n if (!data.popupRef && this.hasPopupData) {\n this._createPopup();\n } else {\n trigger.classList.add(\"popupTriggerArea\");\n }\n container.append(trigger);\n return container;\n }\n getElementsToTriggerPopup() {\n return this.#trigger;\n }\n addHighlightArea() {\n this.container.classList.add(\"highlightArea\");\n }\n #download() {\n this.downloadManager?.openOrDownloadData(this.content, this.filename);\n }\n}\nclass AnnotationLayer {\n #accessibilityManager = null;\n #annotationCanvasMap = null;\n #editableAnnotations = new Map();\n #structTreeLayer = null;\n constructor({\n div,\n accessibilityManager,\n annotationCanvasMap,\n annotationEditorUIManager,\n page,\n viewport,\n structTreeLayer\n }) {\n this.div = div;\n this.#accessibilityManager = accessibilityManager;\n this.#annotationCanvasMap = annotationCanvasMap;\n this.#structTreeLayer = structTreeLayer || null;\n this.page = page;\n this.viewport = viewport;\n this.zIndex = 0;\n this._annotationEditorUIManager = annotationEditorUIManager;\n }\n hasEditableAnnotations() {\n return this.#editableAnnotations.size > 0;\n }\n async #appendElement(element, id) {\n const contentElement = element.firstChild || element;\n const annotationId = contentElement.id = `${AnnotationPrefix}${id}`;\n const ariaAttributes = await this.#structTreeLayer?.getAriaAttributes(annotationId);\n if (ariaAttributes) {\n for (const [key, value] of ariaAttributes) {\n contentElement.setAttribute(key, value);\n }\n }\n this.div.append(element);\n this.#accessibilityManager?.moveElementInDOM(this.div, element, contentElement, false);\n }\n async render(params) {\n const {\n annotations\n } = params;\n const layer = this.div;\n setLayerDimensions(layer, this.viewport);\n const popupToElements = new Map();\n const elementParams = {\n data: null,\n layer,\n linkService: params.linkService,\n downloadManager: params.downloadManager,\n imageResourcesPath: params.imageResourcesPath || \"\",\n renderForms: params.renderForms !== false,\n svgFactory: new DOMSVGFactory(),\n annotationStorage: params.annotationStorage || new AnnotationStorage(),\n enableScripting: params.enableScripting === true,\n hasJSActions: params.hasJSActions,\n fieldObjects: params.fieldObjects,\n parent: this,\n elements: null\n };\n for (const data of annotations) {\n if (data.noHTML) {\n continue;\n }\n const isPopupAnnotation = data.annotationType === AnnotationType.POPUP;\n if (!isPopupAnnotation) {\n const {\n width,\n height\n } = getRectDims(data.rect);\n if (width <= 0 || height <= 0) {\n continue;\n }\n } else {\n const elements = popupToElements.get(data.id);\n if (!elements) {\n continue;\n }\n elementParams.elements = elements;\n }\n elementParams.data = data;\n const element = AnnotationElementFactory.create(elementParams);\n if (!element.isRenderable) {\n continue;\n }\n if (!isPopupAnnotation && data.popupRef) {\n const elements = popupToElements.get(data.popupRef);\n if (!elements) {\n popupToElements.set(data.popupRef, [element]);\n } else {\n elements.push(element);\n }\n }\n const rendered = element.render();\n if (data.hidden) {\n rendered.style.visibility = \"hidden\";\n }\n await this.#appendElement(rendered, data.id);\n if (element._isEditable) {\n this.#editableAnnotations.set(element.data.id, element);\n this._annotationEditorUIManager?.renderAnnotationElement(element);\n }\n }\n this.#setAnnotationCanvasMap();\n }\n update({\n viewport\n }) {\n const layer = this.div;\n this.viewport = viewport;\n setLayerDimensions(layer, {\n rotation: viewport.rotation\n });\n this.#setAnnotationCanvasMap();\n layer.hidden = false;\n }\n #setAnnotationCanvasMap() {\n if (!this.#annotationCanvasMap) {\n return;\n }\n const layer = this.div;\n for (const [id, canvas] of this.#annotationCanvasMap) {\n const element = layer.querySelector(`[data-annotation-id=\"${id}\"]`);\n if (!element) {\n continue;\n }\n canvas.className = \"annotationContent\";\n const {\n firstChild\n } = element;\n if (!firstChild) {\n element.append(canvas);\n } else if (firstChild.nodeName === \"CANVAS\") {\n firstChild.replaceWith(canvas);\n } else if (!firstChild.classList.contains(\"annotationContent\")) {\n firstChild.before(canvas);\n } else {\n firstChild.after(canvas);\n }\n }\n this.#annotationCanvasMap.clear();\n }\n getEditableAnnotations() {\n return Array.from(this.#editableAnnotations.values());\n }\n getEditableAnnotation(id) {\n return this.#editableAnnotations.get(id);\n }\n}\n\n;// ./src/display/editor/freetext.js\n\n\n\n\nconst EOL_PATTERN = /\\r\\n?|\\n/g;\nclass FreeTextEditor extends AnnotationEditor {\n #color;\n #content = \"\";\n #editorDivId = `${this.id}-editor`;\n #editModeAC = null;\n #fontSize;\n static _freeTextDefaultContent = \"\";\n static _internalPadding = 0;\n static _defaultColor = null;\n static _defaultFontSize = 10;\n static get _keyboardManager() {\n const proto = FreeTextEditor.prototype;\n const arrowChecker = self => self.isEmpty();\n const small = AnnotationEditorUIManager.TRANSLATE_SMALL;\n const big = AnnotationEditorUIManager.TRANSLATE_BIG;\n return shadow(this, \"_keyboardManager\", new KeyboardManager([[[\"ctrl+s\", \"mac+meta+s\", \"ctrl+p\", \"mac+meta+p\"], proto.commitOrRemove, {\n bubbles: true\n }], [[\"ctrl+Enter\", \"mac+meta+Enter\", \"Escape\", \"mac+Escape\"], proto.commitOrRemove], [[\"ArrowLeft\", \"mac+ArrowLeft\"], proto._translateEmpty, {\n args: [-small, 0],\n checker: arrowChecker\n }], [[\"ctrl+ArrowLeft\", \"mac+shift+ArrowLeft\"], proto._translateEmpty, {\n args: [-big, 0],\n checker: arrowChecker\n }], [[\"ArrowRight\", \"mac+ArrowRight\"], proto._translateEmpty, {\n args: [small, 0],\n checker: arrowChecker\n }], [[\"ctrl+ArrowRight\", \"mac+shift+ArrowRight\"], proto._translateEmpty, {\n args: [big, 0],\n checker: arrowChecker\n }], [[\"ArrowUp\", \"mac+ArrowUp\"], proto._translateEmpty, {\n args: [0, -small],\n checker: arrowChecker\n }], [[\"ctrl+ArrowUp\", \"mac+shift+ArrowUp\"], proto._translateEmpty, {\n args: [0, -big],\n checker: arrowChecker\n }], [[\"ArrowDown\", \"mac+ArrowDown\"], proto._translateEmpty, {\n args: [0, small],\n checker: arrowChecker\n }], [[\"ctrl+ArrowDown\", \"mac+shift+ArrowDown\"], proto._translateEmpty, {\n args: [0, big],\n checker: arrowChecker\n }]]));\n }\n static _type = \"freetext\";\n static _editorType = AnnotationEditorType.FREETEXT;\n constructor(params) {\n super({\n ...params,\n name: \"freeTextEditor\"\n });\n this.#color = params.color || FreeTextEditor._defaultColor || AnnotationEditor._defaultLineColor;\n this.#fontSize = params.fontSize || FreeTextEditor._defaultFontSize;\n }\n static initialize(l10n, uiManager) {\n AnnotationEditor.initialize(l10n, uiManager);\n const style = getComputedStyle(document.documentElement);\n this._internalPadding = parseFloat(style.getPropertyValue(\"--freetext-padding\"));\n }\n static updateDefaultParams(type, value) {\n switch (type) {\n case AnnotationEditorParamsType.FREETEXT_SIZE:\n FreeTextEditor._defaultFontSize = value;\n break;\n case AnnotationEditorParamsType.FREETEXT_COLOR:\n FreeTextEditor._defaultColor = value;\n break;\n }\n }\n updateParams(type, value) {\n switch (type) {\n case AnnotationEditorParamsType.FREETEXT_SIZE:\n this.#updateFontSize(value);\n break;\n case AnnotationEditorParamsType.FREETEXT_COLOR:\n this.#updateColor(value);\n break;\n }\n }\n static get defaultPropertiesToUpdate() {\n return [[AnnotationEditorParamsType.FREETEXT_SIZE, FreeTextEditor._defaultFontSize], [AnnotationEditorParamsType.FREETEXT_COLOR, FreeTextEditor._defaultColor || AnnotationEditor._defaultLineColor]];\n }\n get propertiesToUpdate() {\n return [[AnnotationEditorParamsType.FREETEXT_SIZE, this.#fontSize], [AnnotationEditorParamsType.FREETEXT_COLOR, this.#color]];\n }\n #updateFontSize(fontSize) {\n const setFontsize = size => {\n this.editorDiv.style.fontSize = `calc(${size}px * var(--scale-factor))`;\n this.translate(0, -(size - this.#fontSize) * this.parentScale);\n this.#fontSize = size;\n this.#setEditorDimensions();\n };\n const savedFontsize = this.#fontSize;\n this.addCommands({\n cmd: setFontsize.bind(this, fontSize),\n undo: setFontsize.bind(this, savedFontsize),\n post: this._uiManager.updateUI.bind(this._uiManager, this),\n mustExec: true,\n type: AnnotationEditorParamsType.FREETEXT_SIZE,\n overwriteIfSameType: true,\n keepUndo: true\n });\n }\n #updateColor(color) {\n const setColor = col => {\n this.#color = this.editorDiv.style.color = col;\n };\n const savedColor = this.#color;\n this.addCommands({\n cmd: setColor.bind(this, color),\n undo: setColor.bind(this, savedColor),\n post: this._uiManager.updateUI.bind(this._uiManager, this),\n mustExec: true,\n type: AnnotationEditorParamsType.FREETEXT_COLOR,\n overwriteIfSameType: true,\n keepUndo: true\n });\n }\n _translateEmpty(x, y) {\n this._uiManager.translateSelectedEditors(x, y, true);\n }\n getInitialTranslation() {\n const scale = this.parentScale;\n return [-FreeTextEditor._internalPadding * scale, -(FreeTextEditor._internalPadding + this.#fontSize) * scale];\n }\n rebuild() {\n if (!this.parent) {\n return;\n }\n super.rebuild();\n if (this.div === null) {\n return;\n }\n if (!this.isAttachedToDOM) {\n this.parent.add(this);\n }\n }\n enableEditMode() {\n if (this.isInEditMode()) {\n return;\n }\n this.parent.setEditingState(false);\n this.parent.updateToolbar(AnnotationEditorType.FREETEXT);\n super.enableEditMode();\n this.overlayDiv.classList.remove(\"enabled\");\n this.editorDiv.contentEditable = true;\n this._isDraggable = false;\n this.div.removeAttribute(\"aria-activedescendant\");\n this.#editModeAC = new AbortController();\n const signal = this._uiManager.combinedSignal(this.#editModeAC);\n this.editorDiv.addEventListener(\"keydown\", this.editorDivKeydown.bind(this), {\n signal\n });\n this.editorDiv.addEventListener(\"focus\", this.editorDivFocus.bind(this), {\n signal\n });\n this.editorDiv.addEventListener(\"blur\", this.editorDivBlur.bind(this), {\n signal\n });\n this.editorDiv.addEventListener(\"input\", this.editorDivInput.bind(this), {\n signal\n });\n this.editorDiv.addEventListener(\"paste\", this.editorDivPaste.bind(this), {\n signal\n });\n }\n disableEditMode() {\n if (!this.isInEditMode()) {\n return;\n }\n this.parent.setEditingState(true);\n super.disableEditMode();\n this.overlayDiv.classList.add(\"enabled\");\n this.editorDiv.contentEditable = false;\n this.div.setAttribute(\"aria-activedescendant\", this.#editorDivId);\n this._isDraggable = true;\n this.#editModeAC?.abort();\n this.#editModeAC = null;\n this.div.focus({\n preventScroll: true\n });\n this.isEditing = false;\n this.parent.div.classList.add(\"freetextEditing\");\n }\n focusin(event) {\n if (!this._focusEventsAllowed) {\n return;\n }\n super.focusin(event);\n if (event.target !== this.editorDiv) {\n this.editorDiv.focus();\n }\n }\n onceAdded(focus) {\n if (this.width) {\n return;\n }\n this.enableEditMode();\n if (focus) {\n this.editorDiv.focus();\n }\n if (this._initialOptions?.isCentered) {\n this.center();\n }\n this._initialOptions = null;\n }\n isEmpty() {\n return !this.editorDiv || this.editorDiv.innerText.trim() === \"\";\n }\n remove() {\n this.isEditing = false;\n if (this.parent) {\n this.parent.setEditingState(true);\n this.parent.div.classList.add(\"freetextEditing\");\n }\n super.remove();\n }\n #extractText() {\n const buffer = [];\n this.editorDiv.normalize();\n let prevChild = null;\n for (const child of this.editorDiv.childNodes) {\n if (prevChild?.nodeType === Node.TEXT_NODE && child.nodeName === \"BR\") {\n continue;\n }\n buffer.push(FreeTextEditor.#getNodeContent(child));\n prevChild = child;\n }\n return buffer.join(\"\\n\");\n }\n #setEditorDimensions() {\n const [parentWidth, parentHeight] = this.parentDimensions;\n let rect;\n if (this.isAttachedToDOM) {\n rect = this.div.getBoundingClientRect();\n } else {\n const {\n currentLayer,\n div\n } = this;\n const savedDisplay = div.style.display;\n const savedVisibility = div.classList.contains(\"hidden\");\n div.classList.remove(\"hidden\");\n div.style.display = \"hidden\";\n currentLayer.div.append(this.div);\n rect = div.getBoundingClientRect();\n div.remove();\n div.style.display = savedDisplay;\n div.classList.toggle(\"hidden\", savedVisibility);\n }\n if (this.rotation % 180 === this.parentRotation % 180) {\n this.width = rect.width / parentWidth;\n this.height = rect.height / parentHeight;\n } else {\n this.width = rect.height / parentWidth;\n this.height = rect.width / parentHeight;\n }\n this.fixAndSetPosition();\n }\n commit() {\n if (!this.isInEditMode()) {\n return;\n }\n super.commit();\n this.disableEditMode();\n const savedText = this.#content;\n const newText = this.#content = this.#extractText().trimEnd();\n if (savedText === newText) {\n return;\n }\n const setText = text => {\n this.#content = text;\n if (!text) {\n this.remove();\n return;\n }\n this.#setContent();\n this._uiManager.rebuild(this);\n this.#setEditorDimensions();\n };\n this.addCommands({\n cmd: () => {\n setText(newText);\n },\n undo: () => {\n setText(savedText);\n },\n mustExec: false\n });\n this.#setEditorDimensions();\n }\n shouldGetKeyboardEvents() {\n return this.isInEditMode();\n }\n enterInEditMode() {\n this.enableEditMode();\n this.editorDiv.focus();\n }\n dblclick(event) {\n this.enterInEditMode();\n }\n keydown(event) {\n if (event.target === this.div && event.key === \"Enter\") {\n this.enterInEditMode();\n event.preventDefault();\n }\n }\n editorDivKeydown(event) {\n FreeTextEditor._keyboardManager.exec(this, event);\n }\n editorDivFocus(event) {\n this.isEditing = true;\n }\n editorDivBlur(event) {\n this.isEditing = false;\n }\n editorDivInput(event) {\n this.parent.div.classList.toggle(\"freetextEditing\", this.isEmpty());\n }\n disableEditing() {\n this.editorDiv.setAttribute(\"role\", \"comment\");\n this.editorDiv.removeAttribute(\"aria-multiline\");\n }\n enableEditing() {\n this.editorDiv.setAttribute(\"role\", \"textbox\");\n this.editorDiv.setAttribute(\"aria-multiline\", true);\n }\n render() {\n if (this.div) {\n return this.div;\n }\n let baseX, baseY;\n if (this.width) {\n baseX = this.x;\n baseY = this.y;\n }\n super.render();\n this.editorDiv = document.createElement(\"div\");\n this.editorDiv.className = \"internal\";\n this.editorDiv.setAttribute(\"id\", this.#editorDivId);\n this.editorDiv.setAttribute(\"data-l10n-id\", \"pdfjs-free-text2\");\n this.editorDiv.setAttribute(\"data-l10n-attrs\", \"default-content\");\n this.enableEditing();\n this.editorDiv.contentEditable = true;\n const {\n style\n } = this.editorDiv;\n style.fontSize = `calc(${this.#fontSize}px * var(--scale-factor))`;\n style.color = this.#color;\n this.div.append(this.editorDiv);\n this.overlayDiv = document.createElement(\"div\");\n this.overlayDiv.classList.add(\"overlay\", \"enabled\");\n this.div.append(this.overlayDiv);\n bindEvents(this, this.div, [\"dblclick\", \"keydown\"]);\n if (this.width) {\n const [parentWidth, parentHeight] = this.parentDimensions;\n if (this.annotationElementId) {\n const {\n position\n } = this._initialData;\n let [tx, ty] = this.getInitialTranslation();\n [tx, ty] = this.pageTranslationToScreen(tx, ty);\n const [pageWidth, pageHeight] = this.pageDimensions;\n const [pageX, pageY] = this.pageTranslation;\n let posX, posY;\n switch (this.rotation) {\n case 0:\n posX = baseX + (position[0] - pageX) / pageWidth;\n posY = baseY + this.height - (position[1] - pageY) / pageHeight;\n break;\n case 90:\n posX = baseX + (position[0] - pageX) / pageWidth;\n posY = baseY - (position[1] - pageY) / pageHeight;\n [tx, ty] = [ty, -tx];\n break;\n case 180:\n posX = baseX - this.width + (position[0] - pageX) / pageWidth;\n posY = baseY - (position[1] - pageY) / pageHeight;\n [tx, ty] = [-tx, -ty];\n break;\n case 270:\n posX = baseX + (position[0] - pageX - this.height * pageHeight) / pageWidth;\n posY = baseY + (position[1] - pageY - this.width * pageWidth) / pageHeight;\n [tx, ty] = [-ty, tx];\n break;\n }\n this.setAt(posX * parentWidth, posY * parentHeight, tx, ty);\n } else {\n this.setAt(baseX * parentWidth, baseY * parentHeight, this.width * parentWidth, this.height * parentHeight);\n }\n this.#setContent();\n this._isDraggable = true;\n this.editorDiv.contentEditable = false;\n } else {\n this._isDraggable = false;\n this.editorDiv.contentEditable = true;\n }\n return this.div;\n }\n static #getNodeContent(node) {\n return (node.nodeType === Node.TEXT_NODE ? node.nodeValue : node.innerText).replaceAll(EOL_PATTERN, \"\");\n }\n editorDivPaste(event) {\n const clipboardData = event.clipboardData || window.clipboardData;\n const {\n types\n } = clipboardData;\n if (types.length === 1 && types[0] === \"text/plain\") {\n return;\n }\n event.preventDefault();\n const paste = FreeTextEditor.#deserializeContent(clipboardData.getData(\"text\") || \"\").replaceAll(EOL_PATTERN, \"\\n\");\n if (!paste) {\n return;\n }\n const selection = window.getSelection();\n if (!selection.rangeCount) {\n return;\n }\n this.editorDiv.normalize();\n selection.deleteFromDocument();\n const range = selection.getRangeAt(0);\n if (!paste.includes(\"\\n\")) {\n range.insertNode(document.createTextNode(paste));\n this.editorDiv.normalize();\n selection.collapseToStart();\n return;\n }\n const {\n startContainer,\n startOffset\n } = range;\n const bufferBefore = [];\n const bufferAfter = [];\n if (startContainer.nodeType === Node.TEXT_NODE) {\n const parent = startContainer.parentElement;\n bufferAfter.push(startContainer.nodeValue.slice(startOffset).replaceAll(EOL_PATTERN, \"\"));\n if (parent !== this.editorDiv) {\n let buffer = bufferBefore;\n for (const child of this.editorDiv.childNodes) {\n if (child === parent) {\n buffer = bufferAfter;\n continue;\n }\n buffer.push(FreeTextEditor.#getNodeContent(child));\n }\n }\n bufferBefore.push(startContainer.nodeValue.slice(0, startOffset).replaceAll(EOL_PATTERN, \"\"));\n } else if (startContainer === this.editorDiv) {\n let buffer = bufferBefore;\n let i = 0;\n for (const child of this.editorDiv.childNodes) {\n if (i++ === startOffset) {\n buffer = bufferAfter;\n }\n buffer.push(FreeTextEditor.#getNodeContent(child));\n }\n }\n this.#content = `${bufferBefore.join(\"\\n\")}${paste}${bufferAfter.join(\"\\n\")}`;\n this.#setContent();\n const newRange = new Range();\n let beforeLength = bufferBefore.reduce((acc, line) => acc + line.length, 0);\n for (const {\n firstChild\n } of this.editorDiv.childNodes) {\n if (firstChild.nodeType === Node.TEXT_NODE) {\n const length = firstChild.nodeValue.length;\n if (beforeLength <= length) {\n newRange.setStart(firstChild, beforeLength);\n newRange.setEnd(firstChild, beforeLength);\n break;\n }\n beforeLength -= length;\n }\n }\n selection.removeAllRanges();\n selection.addRange(newRange);\n }\n #setContent() {\n this.editorDiv.replaceChildren();\n if (!this.#content) {\n return;\n }\n for (const line of this.#content.split(\"\\n\")) {\n const div = document.createElement(\"div\");\n div.append(line ? document.createTextNode(line) : document.createElement(\"br\"));\n this.editorDiv.append(div);\n }\n }\n #serializeContent() {\n return this.#content.replaceAll(\"\\xa0\", \" \");\n }\n static #deserializeContent(content) {\n return content.replaceAll(\" \", \"\\xa0\");\n }\n get contentDiv() {\n return this.editorDiv;\n }\n static async deserialize(data, parent, uiManager) {\n let initialData = null;\n if (data instanceof FreeTextAnnotationElement) {\n const {\n data: {\n defaultAppearanceData: {\n fontSize,\n fontColor\n },\n rect,\n rotation,\n id,\n popupRef\n },\n textContent,\n textPosition,\n parent: {\n page: {\n pageNumber\n }\n }\n } = data;\n if (!textContent || textContent.length === 0) {\n return null;\n }\n initialData = data = {\n annotationType: AnnotationEditorType.FREETEXT,\n color: Array.from(fontColor),\n fontSize,\n value: textContent.join(\"\\n\"),\n position: textPosition,\n pageIndex: pageNumber - 1,\n rect: rect.slice(0),\n rotation,\n id,\n deleted: false,\n popupRef\n };\n }\n const editor = await super.deserialize(data, parent, uiManager);\n editor.#fontSize = data.fontSize;\n editor.#color = Util.makeHexColor(...data.color);\n editor.#content = FreeTextEditor.#deserializeContent(data.value);\n editor.annotationElementId = data.id || null;\n editor._initialData = initialData;\n return editor;\n }\n serialize(isForCopying = false) {\n if (this.isEmpty()) {\n return null;\n }\n if (this.deleted) {\n return this.serializeDeleted();\n }\n const padding = FreeTextEditor._internalPadding * this.parentScale;\n const rect = this.getRect(padding, padding);\n const color = AnnotationEditor._colorManager.convert(this.isAttachedToDOM ? getComputedStyle(this.editorDiv).color : this.#color);\n const serialized = {\n annotationType: AnnotationEditorType.FREETEXT,\n color,\n fontSize: this.#fontSize,\n value: this.#serializeContent(),\n pageIndex: this.pageIndex,\n rect,\n rotation: this.rotation,\n structTreeParentId: this._structTreeParentId\n };\n if (isForCopying) {\n return serialized;\n }\n if (this.annotationElementId && !this.#hasElementChanged(serialized)) {\n return null;\n }\n serialized.id = this.annotationElementId;\n return serialized;\n }\n #hasElementChanged(serialized) {\n const {\n value,\n fontSize,\n color,\n pageIndex\n } = this._initialData;\n return this._hasBeenMoved || serialized.value !== value || serialized.fontSize !== fontSize || serialized.color.some((c, i) => c !== color[i]) || serialized.pageIndex !== pageIndex;\n }\n renderAnnotationElement(annotation) {\n const content = super.renderAnnotationElement(annotation);\n if (this.deleted) {\n return content;\n }\n const {\n style\n } = content;\n style.fontSize = `calc(${this.#fontSize}px * var(--scale-factor))`;\n style.color = this.#color;\n content.replaceChildren();\n for (const line of this.#content.split(\"\\n\")) {\n const div = document.createElement(\"div\");\n div.append(line ? document.createTextNode(line) : document.createElement(\"br\"));\n content.append(div);\n }\n const padding = FreeTextEditor._internalPadding * this.parentScale;\n annotation.updateEdited({\n rect: this.getRect(padding, padding),\n popupContent: this.#content\n });\n return content;\n }\n resetAnnotationElement(annotation) {\n super.resetAnnotationElement(annotation);\n annotation.resetEdited();\n }\n}\n\n;// ./src/display/editor/drawers/outline.js\n\nclass Outline {\n static PRECISION = 1e-4;\n toSVGPath() {\n unreachable(\"Abstract method `toSVGPath` must be implemented.\");\n }\n get box() {\n unreachable(\"Abstract getter `box` must be implemented.\");\n }\n serialize(_bbox, _rotation) {\n unreachable(\"Abstract method `serialize` must be implemented.\");\n }\n static _rescale(src, tx, ty, sx, sy, dest) {\n dest ||= new Float32Array(src.length);\n for (let i = 0, ii = src.length; i < ii; i += 2) {\n dest[i] = tx + src[i] * sx;\n dest[i + 1] = ty + src[i + 1] * sy;\n }\n return dest;\n }\n static _rescaleAndSwap(src, tx, ty, sx, sy, dest) {\n dest ||= new Float32Array(src.length);\n for (let i = 0, ii = src.length; i < ii; i += 2) {\n dest[i] = tx + src[i + 1] * sx;\n dest[i + 1] = ty + src[i] * sy;\n }\n return dest;\n }\n static _translate(src, tx, ty, dest) {\n dest ||= new Float32Array(src.length);\n for (let i = 0, ii = src.length; i < ii; i += 2) {\n dest[i] = tx + src[i];\n dest[i + 1] = ty + src[i + 1];\n }\n return dest;\n }\n static svgRound(x) {\n return Math.round(x * 10000);\n }\n static _normalizePoint(x, y, parentWidth, parentHeight, rotation) {\n switch (rotation) {\n case 90:\n return [1 - y / parentWidth, x / parentHeight];\n case 180:\n return [1 - x / parentWidth, 1 - y / parentHeight];\n case 270:\n return [y / parentWidth, 1 - x / parentHeight];\n default:\n return [x / parentWidth, y / parentHeight];\n }\n }\n static _normalizePagePoint(x, y, rotation) {\n switch (rotation) {\n case 90:\n return [1 - y, x];\n case 180:\n return [1 - x, 1 - y];\n case 270:\n return [y, 1 - x];\n default:\n return [x, y];\n }\n }\n static createBezierPoints(x1, y1, x2, y2, x3, y3) {\n return [(x1 + 5 * x2) / 6, (y1 + 5 * y2) / 6, (5 * x2 + x3) / 6, (5 * y2 + y3) / 6, (x2 + x3) / 2, (y2 + y3) / 2];\n }\n}\n\n;// ./src/display/editor/drawers/freedraw.js\n\n\nclass FreeDrawOutliner {\n #box;\n #bottom = [];\n #innerMargin;\n #isLTR;\n #top = [];\n #last = new Float32Array(18);\n #lastX;\n #lastY;\n #min;\n #min_dist;\n #scaleFactor;\n #thickness;\n #points = [];\n static #MIN_DIST = 8;\n static #MIN_DIFF = 2;\n static #MIN = FreeDrawOutliner.#MIN_DIST + FreeDrawOutliner.#MIN_DIFF;\n constructor({\n x,\n y\n }, box, scaleFactor, thickness, isLTR, innerMargin = 0) {\n this.#box = box;\n this.#thickness = thickness * scaleFactor;\n this.#isLTR = isLTR;\n this.#last.set([NaN, NaN, NaN, NaN, x, y], 6);\n this.#innerMargin = innerMargin;\n this.#min_dist = FreeDrawOutliner.#MIN_DIST * scaleFactor;\n this.#min = FreeDrawOutliner.#MIN * scaleFactor;\n this.#scaleFactor = scaleFactor;\n this.#points.push(x, y);\n }\n isEmpty() {\n return isNaN(this.#last[8]);\n }\n #getLastCoords() {\n const lastTop = this.#last.subarray(4, 6);\n const lastBottom = this.#last.subarray(16, 18);\n const [x, y, width, height] = this.#box;\n return [(this.#lastX + (lastTop[0] - lastBottom[0]) / 2 - x) / width, (this.#lastY + (lastTop[1] - lastBottom[1]) / 2 - y) / height, (this.#lastX + (lastBottom[0] - lastTop[0]) / 2 - x) / width, (this.#lastY + (lastBottom[1] - lastTop[1]) / 2 - y) / height];\n }\n add({\n x,\n y\n }) {\n this.#lastX = x;\n this.#lastY = y;\n const [layerX, layerY, layerWidth, layerHeight] = this.#box;\n let [x1, y1, x2, y2] = this.#last.subarray(8, 12);\n const diffX = x - x2;\n const diffY = y - y2;\n const d = Math.hypot(diffX, diffY);\n if (d < this.#min) {\n return false;\n }\n const diffD = d - this.#min_dist;\n const K = diffD / d;\n const shiftX = K * diffX;\n const shiftY = K * diffY;\n let x0 = x1;\n let y0 = y1;\n x1 = x2;\n y1 = y2;\n x2 += shiftX;\n y2 += shiftY;\n this.#points?.push(x, y);\n const nX = -shiftY / diffD;\n const nY = shiftX / diffD;\n const thX = nX * this.#thickness;\n const thY = nY * this.#thickness;\n this.#last.set(this.#last.subarray(2, 8), 0);\n this.#last.set([x2 + thX, y2 + thY], 4);\n this.#last.set(this.#last.subarray(14, 18), 12);\n this.#last.set([x2 - thX, y2 - thY], 16);\n if (isNaN(this.#last[6])) {\n if (this.#top.length === 0) {\n this.#last.set([x1 + thX, y1 + thY], 2);\n this.#top.push(NaN, NaN, NaN, NaN, (x1 + thX - layerX) / layerWidth, (y1 + thY - layerY) / layerHeight);\n this.#last.set([x1 - thX, y1 - thY], 14);\n this.#bottom.push(NaN, NaN, NaN, NaN, (x1 - thX - layerX) / layerWidth, (y1 - thY - layerY) / layerHeight);\n }\n this.#last.set([x0, y0, x1, y1, x2, y2], 6);\n return !this.isEmpty();\n }\n this.#last.set([x0, y0, x1, y1, x2, y2], 6);\n const angle = Math.abs(Math.atan2(y0 - y1, x0 - x1) - Math.atan2(shiftY, shiftX));\n if (angle < Math.PI / 2) {\n [x1, y1, x2, y2] = this.#last.subarray(2, 6);\n this.#top.push(NaN, NaN, NaN, NaN, ((x1 + x2) / 2 - layerX) / layerWidth, ((y1 + y2) / 2 - layerY) / layerHeight);\n [x1, y1, x0, y0] = this.#last.subarray(14, 18);\n this.#bottom.push(NaN, NaN, NaN, NaN, ((x0 + x1) / 2 - layerX) / layerWidth, ((y0 + y1) / 2 - layerY) / layerHeight);\n return true;\n }\n [x0, y0, x1, y1, x2, y2] = this.#last.subarray(0, 6);\n this.#top.push(((x0 + 5 * x1) / 6 - layerX) / layerWidth, ((y0 + 5 * y1) / 6 - layerY) / layerHeight, ((5 * x1 + x2) / 6 - layerX) / layerWidth, ((5 * y1 + y2) / 6 - layerY) / layerHeight, ((x1 + x2) / 2 - layerX) / layerWidth, ((y1 + y2) / 2 - layerY) / layerHeight);\n [x2, y2, x1, y1, x0, y0] = this.#last.subarray(12, 18);\n this.#bottom.push(((x0 + 5 * x1) / 6 - layerX) / layerWidth, ((y0 + 5 * y1) / 6 - layerY) / layerHeight, ((5 * x1 + x2) / 6 - layerX) / layerWidth, ((5 * y1 + y2) / 6 - layerY) / layerHeight, ((x1 + x2) / 2 - layerX) / layerWidth, ((y1 + y2) / 2 - layerY) / layerHeight);\n return true;\n }\n toSVGPath() {\n if (this.isEmpty()) {\n return \"\";\n }\n const top = this.#top;\n const bottom = this.#bottom;\n if (isNaN(this.#last[6]) && !this.isEmpty()) {\n return this.#toSVGPathTwoPoints();\n }\n const buffer = [];\n buffer.push(`M${top[4]} ${top[5]}`);\n for (let i = 6; i < top.length; i += 6) {\n if (isNaN(top[i])) {\n buffer.push(`L${top[i + 4]} ${top[i + 5]}`);\n } else {\n buffer.push(`C${top[i]} ${top[i + 1]} ${top[i + 2]} ${top[i + 3]} ${top[i + 4]} ${top[i + 5]}`);\n }\n }\n this.#toSVGPathEnd(buffer);\n for (let i = bottom.length - 6; i >= 6; i -= 6) {\n if (isNaN(bottom[i])) {\n buffer.push(`L${bottom[i + 4]} ${bottom[i + 5]}`);\n } else {\n buffer.push(`C${bottom[i]} ${bottom[i + 1]} ${bottom[i + 2]} ${bottom[i + 3]} ${bottom[i + 4]} ${bottom[i + 5]}`);\n }\n }\n this.#toSVGPathStart(buffer);\n return buffer.join(\" \");\n }\n #toSVGPathTwoPoints() {\n const [x, y, width, height] = this.#box;\n const [lastTopX, lastTopY, lastBottomX, lastBottomY] = this.#getLastCoords();\n return `M${(this.#last[2] - x) / width} ${(this.#last[3] - y) / height} L${(this.#last[4] - x) / width} ${(this.#last[5] - y) / height} L${lastTopX} ${lastTopY} L${lastBottomX} ${lastBottomY} L${(this.#last[16] - x) / width} ${(this.#last[17] - y) / height} L${(this.#last[14] - x) / width} ${(this.#last[15] - y) / height} Z`;\n }\n #toSVGPathStart(buffer) {\n const bottom = this.#bottom;\n buffer.push(`L${bottom[4]} ${bottom[5]} Z`);\n }\n #toSVGPathEnd(buffer) {\n const [x, y, width, height] = this.#box;\n const lastTop = this.#last.subarray(4, 6);\n const lastBottom = this.#last.subarray(16, 18);\n const [lastTopX, lastTopY, lastBottomX, lastBottomY] = this.#getLastCoords();\n buffer.push(`L${(lastTop[0] - x) / width} ${(lastTop[1] - y) / height} L${lastTopX} ${lastTopY} L${lastBottomX} ${lastBottomY} L${(lastBottom[0] - x) / width} ${(lastBottom[1] - y) / height}`);\n }\n newFreeDrawOutline(outline, points, box, scaleFactor, innerMargin, isLTR) {\n return new FreeDrawOutline(outline, points, box, scaleFactor, innerMargin, isLTR);\n }\n getOutlines() {\n const top = this.#top;\n const bottom = this.#bottom;\n const last = this.#last;\n const [layerX, layerY, layerWidth, layerHeight] = this.#box;\n const points = new Float32Array((this.#points?.length ?? 0) + 2);\n for (let i = 0, ii = points.length - 2; i < ii; i += 2) {\n points[i] = (this.#points[i] - layerX) / layerWidth;\n points[i + 1] = (this.#points[i + 1] - layerY) / layerHeight;\n }\n points[points.length - 2] = (this.#lastX - layerX) / layerWidth;\n points[points.length - 1] = (this.#lastY - layerY) / layerHeight;\n if (isNaN(last[6]) && !this.isEmpty()) {\n return this.#getOutlineTwoPoints(points);\n }\n const outline = new Float32Array(this.#top.length + 24 + this.#bottom.length);\n let N = top.length;\n for (let i = 0; i < N; i += 2) {\n if (isNaN(top[i])) {\n outline[i] = outline[i + 1] = NaN;\n continue;\n }\n outline[i] = top[i];\n outline[i + 1] = top[i + 1];\n }\n N = this.#getOutlineEnd(outline, N);\n for (let i = bottom.length - 6; i >= 6; i -= 6) {\n for (let j = 0; j < 6; j += 2) {\n if (isNaN(bottom[i + j])) {\n outline[N] = outline[N + 1] = NaN;\n N += 2;\n continue;\n }\n outline[N] = bottom[i + j];\n outline[N + 1] = bottom[i + j + 1];\n N += 2;\n }\n }\n this.#getOutlineStart(outline, N);\n return this.newFreeDrawOutline(outline, points, this.#box, this.#scaleFactor, this.#innerMargin, this.#isLTR);\n }\n #getOutlineTwoPoints(points) {\n const last = this.#last;\n const [layerX, layerY, layerWidth, layerHeight] = this.#box;\n const [lastTopX, lastTopY, lastBottomX, lastBottomY] = this.#getLastCoords();\n const outline = new Float32Array(36);\n outline.set([NaN, NaN, NaN, NaN, (last[2] - layerX) / layerWidth, (last[3] - layerY) / layerHeight, NaN, NaN, NaN, NaN, (last[4] - layerX) / layerWidth, (last[5] - layerY) / layerHeight, NaN, NaN, NaN, NaN, lastTopX, lastTopY, NaN, NaN, NaN, NaN, lastBottomX, lastBottomY, NaN, NaN, NaN, NaN, (last[16] - layerX) / layerWidth, (last[17] - layerY) / layerHeight, NaN, NaN, NaN, NaN, (last[14] - layerX) / layerWidth, (last[15] - layerY) / layerHeight], 0);\n return this.newFreeDrawOutline(outline, points, this.#box, this.#scaleFactor, this.#innerMargin, this.#isLTR);\n }\n #getOutlineStart(outline, pos) {\n const bottom = this.#bottom;\n outline.set([NaN, NaN, NaN, NaN, bottom[4], bottom[5]], pos);\n return pos += 6;\n }\n #getOutlineEnd(outline, pos) {\n const lastTop = this.#last.subarray(4, 6);\n const lastBottom = this.#last.subarray(16, 18);\n const [layerX, layerY, layerWidth, layerHeight] = this.#box;\n const [lastTopX, lastTopY, lastBottomX, lastBottomY] = this.#getLastCoords();\n outline.set([NaN, NaN, NaN, NaN, (lastTop[0] - layerX) / layerWidth, (lastTop[1] - layerY) / layerHeight, NaN, NaN, NaN, NaN, lastTopX, lastTopY, NaN, NaN, NaN, NaN, lastBottomX, lastBottomY, NaN, NaN, NaN, NaN, (lastBottom[0] - layerX) / layerWidth, (lastBottom[1] - layerY) / layerHeight], pos);\n return pos += 24;\n }\n}\nclass FreeDrawOutline extends Outline {\n #box;\n #bbox = new Float32Array(4);\n #innerMargin;\n #isLTR;\n #points;\n #scaleFactor;\n #outline;\n constructor(outline, points, box, scaleFactor, innerMargin, isLTR) {\n super();\n this.#outline = outline;\n this.#points = points;\n this.#box = box;\n this.#scaleFactor = scaleFactor;\n this.#innerMargin = innerMargin;\n this.#isLTR = isLTR;\n this.lastPoint = [NaN, NaN];\n this.#computeMinMax(isLTR);\n const [x, y, width, height] = this.#bbox;\n for (let i = 0, ii = outline.length; i < ii; i += 2) {\n outline[i] = (outline[i] - x) / width;\n outline[i + 1] = (outline[i + 1] - y) / height;\n }\n for (let i = 0, ii = points.length; i < ii; i += 2) {\n points[i] = (points[i] - x) / width;\n points[i + 1] = (points[i + 1] - y) / height;\n }\n }\n toSVGPath() {\n const buffer = [`M${this.#outline[4]} ${this.#outline[5]}`];\n for (let i = 6, ii = this.#outline.length; i < ii; i += 6) {\n if (isNaN(this.#outline[i])) {\n buffer.push(`L${this.#outline[i + 4]} ${this.#outline[i + 5]}`);\n continue;\n }\n buffer.push(`C${this.#outline[i]} ${this.#outline[i + 1]} ${this.#outline[i + 2]} ${this.#outline[i + 3]} ${this.#outline[i + 4]} ${this.#outline[i + 5]}`);\n }\n buffer.push(\"Z\");\n return buffer.join(\" \");\n }\n serialize([blX, blY, trX, trY], rotation) {\n const width = trX - blX;\n const height = trY - blY;\n let outline;\n let points;\n switch (rotation) {\n case 0:\n outline = Outline._rescale(this.#outline, blX, trY, width, -height);\n points = Outline._rescale(this.#points, blX, trY, width, -height);\n break;\n case 90:\n outline = Outline._rescaleAndSwap(this.#outline, blX, blY, width, height);\n points = Outline._rescaleAndSwap(this.#points, blX, blY, width, height);\n break;\n case 180:\n outline = Outline._rescale(this.#outline, trX, blY, -width, height);\n points = Outline._rescale(this.#points, trX, blY, -width, height);\n break;\n case 270:\n outline = Outline._rescaleAndSwap(this.#outline, trX, trY, -width, -height);\n points = Outline._rescaleAndSwap(this.#points, trX, trY, -width, -height);\n break;\n }\n return {\n outline: Array.from(outline),\n points: [Array.from(points)]\n };\n }\n #computeMinMax(isLTR) {\n const outline = this.#outline;\n let lastX = outline[4];\n let lastY = outline[5];\n let minX = lastX;\n let minY = lastY;\n let maxX = lastX;\n let maxY = lastY;\n let lastPointX = lastX;\n let lastPointY = lastY;\n const ltrCallback = isLTR ? Math.max : Math.min;\n for (let i = 6, ii = outline.length; i < ii; i += 6) {\n if (isNaN(outline[i])) {\n minX = Math.min(minX, outline[i + 4]);\n minY = Math.min(minY, outline[i + 5]);\n maxX = Math.max(maxX, outline[i + 4]);\n maxY = Math.max(maxY, outline[i + 5]);\n if (lastPointY < outline[i + 5]) {\n lastPointX = outline[i + 4];\n lastPointY = outline[i + 5];\n } else if (lastPointY === outline[i + 5]) {\n lastPointX = ltrCallback(lastPointX, outline[i + 4]);\n }\n } else {\n const bbox = Util.bezierBoundingBox(lastX, lastY, ...outline.slice(i, i + 6));\n minX = Math.min(minX, bbox[0]);\n minY = Math.min(minY, bbox[1]);\n maxX = Math.max(maxX, bbox[2]);\n maxY = Math.max(maxY, bbox[3]);\n if (lastPointY < bbox[3]) {\n lastPointX = bbox[2];\n lastPointY = bbox[3];\n } else if (lastPointY === bbox[3]) {\n lastPointX = ltrCallback(lastPointX, bbox[2]);\n }\n }\n lastX = outline[i + 4];\n lastY = outline[i + 5];\n }\n const bbox = this.#bbox;\n bbox[0] = minX - this.#innerMargin;\n bbox[1] = minY - this.#innerMargin;\n bbox[2] = maxX - minX + 2 * this.#innerMargin;\n bbox[3] = maxY - minY + 2 * this.#innerMargin;\n this.lastPoint = [lastPointX, lastPointY];\n }\n get box() {\n return this.#bbox;\n }\n newOutliner(point, box, scaleFactor, thickness, isLTR, innerMargin = 0) {\n return new FreeDrawOutliner(point, box, scaleFactor, thickness, isLTR, innerMargin);\n }\n getNewOutline(thickness, innerMargin) {\n const [x, y, width, height] = this.#bbox;\n const [layerX, layerY, layerWidth, layerHeight] = this.#box;\n const sx = width * layerWidth;\n const sy = height * layerHeight;\n const tx = x * layerWidth + layerX;\n const ty = y * layerHeight + layerY;\n const outliner = this.newOutliner({\n x: this.#points[0] * sx + tx,\n y: this.#points[1] * sy + ty\n }, this.#box, this.#scaleFactor, thickness, this.#isLTR, innerMargin ?? this.#innerMargin);\n for (let i = 2; i < this.#points.length; i += 2) {\n outliner.add({\n x: this.#points[i] * sx + tx,\n y: this.#points[i + 1] * sy + ty\n });\n }\n return outliner.getOutlines();\n }\n}\n\n;// ./src/display/editor/drawers/highlight.js\n\n\nclass HighlightOutliner {\n #box;\n #lastPoint;\n #verticalEdges = [];\n #intervals = [];\n constructor(boxes, borderWidth = 0, innerMargin = 0, isLTR = true) {\n let minX = Infinity;\n let maxX = -Infinity;\n let minY = Infinity;\n let maxY = -Infinity;\n const NUMBER_OF_DIGITS = 4;\n const EPSILON = 10 ** -NUMBER_OF_DIGITS;\n for (const {\n x,\n y,\n width,\n height\n } of boxes) {\n const x1 = Math.floor((x - borderWidth) / EPSILON) * EPSILON;\n const x2 = Math.ceil((x + width + borderWidth) / EPSILON) * EPSILON;\n const y1 = Math.floor((y - borderWidth) / EPSILON) * EPSILON;\n const y2 = Math.ceil((y + height + borderWidth) / EPSILON) * EPSILON;\n const left = [x1, y1, y2, true];\n const right = [x2, y1, y2, false];\n this.#verticalEdges.push(left, right);\n minX = Math.min(minX, x1);\n maxX = Math.max(maxX, x2);\n minY = Math.min(minY, y1);\n maxY = Math.max(maxY, y2);\n }\n const bboxWidth = maxX - minX + 2 * innerMargin;\n const bboxHeight = maxY - minY + 2 * innerMargin;\n const shiftedMinX = minX - innerMargin;\n const shiftedMinY = minY - innerMargin;\n const lastEdge = this.#verticalEdges.at(isLTR ? -1 : -2);\n const lastPoint = [lastEdge[0], lastEdge[2]];\n for (const edge of this.#verticalEdges) {\n const [x, y1, y2] = edge;\n edge[0] = (x - shiftedMinX) / bboxWidth;\n edge[1] = (y1 - shiftedMinY) / bboxHeight;\n edge[2] = (y2 - shiftedMinY) / bboxHeight;\n }\n this.#box = new Float32Array([shiftedMinX, shiftedMinY, bboxWidth, bboxHeight]);\n this.#lastPoint = lastPoint;\n }\n getOutlines() {\n this.#verticalEdges.sort((a, b) => a[0] - b[0] || a[1] - b[1] || a[2] - b[2]);\n const outlineVerticalEdges = [];\n for (const edge of this.#verticalEdges) {\n if (edge[3]) {\n outlineVerticalEdges.push(...this.#breakEdge(edge));\n this.#insert(edge);\n } else {\n this.#remove(edge);\n outlineVerticalEdges.push(...this.#breakEdge(edge));\n }\n }\n return this.#getOutlines(outlineVerticalEdges);\n }\n #getOutlines(outlineVerticalEdges) {\n const edges = [];\n const allEdges = new Set();\n for (const edge of outlineVerticalEdges) {\n const [x, y1, y2] = edge;\n edges.push([x, y1, edge], [x, y2, edge]);\n }\n edges.sort((a, b) => a[1] - b[1] || a[0] - b[0]);\n for (let i = 0, ii = edges.length; i < ii; i += 2) {\n const edge1 = edges[i][2];\n const edge2 = edges[i + 1][2];\n edge1.push(edge2);\n edge2.push(edge1);\n allEdges.add(edge1);\n allEdges.add(edge2);\n }\n const outlines = [];\n let outline;\n while (allEdges.size > 0) {\n const edge = allEdges.values().next().value;\n let [x, y1, y2, edge1, edge2] = edge;\n allEdges.delete(edge);\n let lastPointX = x;\n let lastPointY = y1;\n outline = [x, y2];\n outlines.push(outline);\n while (true) {\n let e;\n if (allEdges.has(edge1)) {\n e = edge1;\n } else if (allEdges.has(edge2)) {\n e = edge2;\n } else {\n break;\n }\n allEdges.delete(e);\n [x, y1, y2, edge1, edge2] = e;\n if (lastPointX !== x) {\n outline.push(lastPointX, lastPointY, x, lastPointY === y1 ? y1 : y2);\n lastPointX = x;\n }\n lastPointY = lastPointY === y1 ? y2 : y1;\n }\n outline.push(lastPointX, lastPointY);\n }\n return new HighlightOutline(outlines, this.#box, this.#lastPoint);\n }\n #binarySearch(y) {\n const array = this.#intervals;\n let start = 0;\n let end = array.length - 1;\n while (start <= end) {\n const middle = start + end >> 1;\n const y1 = array[middle][0];\n if (y1 === y) {\n return middle;\n }\n if (y1 < y) {\n start = middle + 1;\n } else {\n end = middle - 1;\n }\n }\n return end + 1;\n }\n #insert([, y1, y2]) {\n const index = this.#binarySearch(y1);\n this.#intervals.splice(index, 0, [y1, y2]);\n }\n #remove([, y1, y2]) {\n const index = this.#binarySearch(y1);\n for (let i = index; i < this.#intervals.length; i++) {\n const [start, end] = this.#intervals[i];\n if (start !== y1) {\n break;\n }\n if (start === y1 && end === y2) {\n this.#intervals.splice(i, 1);\n return;\n }\n }\n for (let i = index - 1; i >= 0; i--) {\n const [start, end] = this.#intervals[i];\n if (start !== y1) {\n break;\n }\n if (start === y1 && end === y2) {\n this.#intervals.splice(i, 1);\n return;\n }\n }\n }\n #breakEdge(edge) {\n const [x, y1, y2] = edge;\n const results = [[x, y1, y2]];\n const index = this.#binarySearch(y2);\n for (let i = 0; i < index; i++) {\n const [start, end] = this.#intervals[i];\n for (let j = 0, jj = results.length; j < jj; j++) {\n const [, y3, y4] = results[j];\n if (end <= y3 || y4 <= start) {\n continue;\n }\n if (y3 >= start) {\n if (y4 > end) {\n results[j][1] = end;\n } else {\n if (jj === 1) {\n return [];\n }\n results.splice(j, 1);\n j--;\n jj--;\n }\n continue;\n }\n results[j][2] = start;\n if (y4 > end) {\n results.push([x, end, y4]);\n }\n }\n }\n return results;\n }\n}\nclass HighlightOutline extends Outline {\n #box;\n #outlines;\n constructor(outlines, box, lastPoint) {\n super();\n this.#outlines = outlines;\n this.#box = box;\n this.lastPoint = lastPoint;\n }\n toSVGPath() {\n const buffer = [];\n for (const polygon of this.#outlines) {\n let [prevX, prevY] = polygon;\n buffer.push(`M${prevX} ${prevY}`);\n for (let i = 2; i < polygon.length; i += 2) {\n const x = polygon[i];\n const y = polygon[i + 1];\n if (x === prevX) {\n buffer.push(`V${y}`);\n prevY = y;\n } else if (y === prevY) {\n buffer.push(`H${x}`);\n prevX = x;\n }\n }\n buffer.push(\"Z\");\n }\n return buffer.join(\" \");\n }\n serialize([blX, blY, trX, trY], _rotation) {\n const outlines = [];\n const width = trX - blX;\n const height = trY - blY;\n for (const outline of this.#outlines) {\n const points = new Array(outline.length);\n for (let i = 0; i < outline.length; i += 2) {\n points[i] = blX + outline[i] * width;\n points[i + 1] = trY - outline[i + 1] * height;\n }\n outlines.push(points);\n }\n return outlines;\n }\n get box() {\n return this.#box;\n }\n get classNamesForOutlining() {\n return [\"highlightOutline\"];\n }\n}\nclass FreeHighlightOutliner extends FreeDrawOutliner {\n newFreeDrawOutline(outline, points, box, scaleFactor, innerMargin, isLTR) {\n return new FreeHighlightOutline(outline, points, box, scaleFactor, innerMargin, isLTR);\n }\n}\nclass FreeHighlightOutline extends FreeDrawOutline {\n newOutliner(point, box, scaleFactor, thickness, isLTR, innerMargin = 0) {\n return new FreeHighlightOutliner(point, box, scaleFactor, thickness, isLTR, innerMargin);\n }\n}\n\n;// ./src/display/editor/color_picker.js\n\n\n\nclass ColorPicker {\n #button = null;\n #buttonSwatch = null;\n #defaultColor;\n #dropdown = null;\n #dropdownWasFromKeyboard = false;\n #isMainColorPicker = false;\n #editor = null;\n #eventBus;\n #openDropdownAC = null;\n #uiManager = null;\n #type;\n static #l10nColor = null;\n static get _keyboardManager() {\n return shadow(this, \"_keyboardManager\", new KeyboardManager([[[\"Escape\", \"mac+Escape\"], ColorPicker.prototype._hideDropdownFromKeyboard], [[\" \", \"mac+ \"], ColorPicker.prototype._colorSelectFromKeyboard], [[\"ArrowDown\", \"ArrowRight\", \"mac+ArrowDown\", \"mac+ArrowRight\"], ColorPicker.prototype._moveToNext], [[\"ArrowUp\", \"ArrowLeft\", \"mac+ArrowUp\", \"mac+ArrowLeft\"], ColorPicker.prototype._moveToPrevious], [[\"Home\", \"mac+Home\"], ColorPicker.prototype._moveToBeginning], [[\"End\", \"mac+End\"], ColorPicker.prototype._moveToEnd]]));\n }\n constructor({\n editor = null,\n uiManager = null\n }) {\n if (editor) {\n this.#isMainColorPicker = false;\n this.#type = AnnotationEditorParamsType.HIGHLIGHT_COLOR;\n this.#editor = editor;\n } else {\n this.#isMainColorPicker = true;\n this.#type = AnnotationEditorParamsType.HIGHLIGHT_DEFAULT_COLOR;\n }\n this.#uiManager = editor?._uiManager || uiManager;\n this.#eventBus = this.#uiManager._eventBus;\n this.#defaultColor = editor?.color || this.#uiManager?.highlightColors.values().next().value || \"#FFFF98\";\n ColorPicker.#l10nColor ||= Object.freeze({\n blue: \"pdfjs-editor-colorpicker-blue\",\n green: \"pdfjs-editor-colorpicker-green\",\n pink: \"pdfjs-editor-colorpicker-pink\",\n red: \"pdfjs-editor-colorpicker-red\",\n yellow: \"pdfjs-editor-colorpicker-yellow\"\n });\n }\n renderButton() {\n const button = this.#button = document.createElement(\"button\");\n button.className = \"colorPicker\";\n button.tabIndex = \"0\";\n button.setAttribute(\"data-l10n-id\", \"pdfjs-editor-colorpicker-button\");\n button.setAttribute(\"aria-haspopup\", true);\n const signal = this.#uiManager._signal;\n button.addEventListener(\"click\", this.#openDropdown.bind(this), {\n signal\n });\n button.addEventListener(\"keydown\", this.#keyDown.bind(this), {\n signal\n });\n const swatch = this.#buttonSwatch = document.createElement(\"span\");\n swatch.className = \"swatch\";\n swatch.setAttribute(\"aria-hidden\", true);\n swatch.style.backgroundColor = this.#defaultColor;\n button.append(swatch);\n return button;\n }\n renderMainDropdown() {\n const dropdown = this.#dropdown = this.#getDropdownRoot();\n dropdown.setAttribute(\"aria-orientation\", \"horizontal\");\n dropdown.setAttribute(\"aria-labelledby\", \"highlightColorPickerLabel\");\n return dropdown;\n }\n #getDropdownRoot() {\n const div = document.createElement(\"div\");\n const signal = this.#uiManager._signal;\n div.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n div.className = \"dropdown\";\n div.role = \"listbox\";\n div.setAttribute(\"aria-multiselectable\", false);\n div.setAttribute(\"aria-orientation\", \"vertical\");\n div.setAttribute(\"data-l10n-id\", \"pdfjs-editor-colorpicker-dropdown\");\n for (const [name, color] of this.#uiManager.highlightColors) {\n const button = document.createElement(\"button\");\n button.tabIndex = \"0\";\n button.role = \"option\";\n button.setAttribute(\"data-color\", color);\n button.title = name;\n button.setAttribute(\"data-l10n-id\", ColorPicker.#l10nColor[name]);\n const swatch = document.createElement(\"span\");\n button.append(swatch);\n swatch.className = \"swatch\";\n swatch.style.backgroundColor = color;\n button.setAttribute(\"aria-selected\", color === this.#defaultColor);\n button.addEventListener(\"click\", this.#colorSelect.bind(this, color), {\n signal\n });\n div.append(button);\n }\n div.addEventListener(\"keydown\", this.#keyDown.bind(this), {\n signal\n });\n return div;\n }\n #colorSelect(color, event) {\n event.stopPropagation();\n this.#eventBus.dispatch(\"switchannotationeditorparams\", {\n source: this,\n type: this.#type,\n value: color\n });\n }\n _colorSelectFromKeyboard(event) {\n if (event.target === this.#button) {\n this.#openDropdown(event);\n return;\n }\n const color = event.target.getAttribute(\"data-color\");\n if (!color) {\n return;\n }\n this.#colorSelect(color, event);\n }\n _moveToNext(event) {\n if (!this.#isDropdownVisible) {\n this.#openDropdown(event);\n return;\n }\n if (event.target === this.#button) {\n this.#dropdown.firstChild?.focus();\n return;\n }\n event.target.nextSibling?.focus();\n }\n _moveToPrevious(event) {\n if (event.target === this.#dropdown?.firstChild || event.target === this.#button) {\n if (this.#isDropdownVisible) {\n this._hideDropdownFromKeyboard();\n }\n return;\n }\n if (!this.#isDropdownVisible) {\n this.#openDropdown(event);\n }\n event.target.previousSibling?.focus();\n }\n _moveToBeginning(event) {\n if (!this.#isDropdownVisible) {\n this.#openDropdown(event);\n return;\n }\n this.#dropdown.firstChild?.focus();\n }\n _moveToEnd(event) {\n if (!this.#isDropdownVisible) {\n this.#openDropdown(event);\n return;\n }\n this.#dropdown.lastChild?.focus();\n }\n #keyDown(event) {\n ColorPicker._keyboardManager.exec(this, event);\n }\n #openDropdown(event) {\n if (this.#isDropdownVisible) {\n this.hideDropdown();\n return;\n }\n this.#dropdownWasFromKeyboard = event.detail === 0;\n if (!this.#openDropdownAC) {\n this.#openDropdownAC = new AbortController();\n window.addEventListener(\"pointerdown\", this.#pointerDown.bind(this), {\n signal: this.#uiManager.combinedSignal(this.#openDropdownAC)\n });\n }\n if (this.#dropdown) {\n this.#dropdown.classList.remove(\"hidden\");\n return;\n }\n const root = this.#dropdown = this.#getDropdownRoot();\n this.#button.append(root);\n }\n #pointerDown(event) {\n if (this.#dropdown?.contains(event.target)) {\n return;\n }\n this.hideDropdown();\n }\n hideDropdown() {\n this.#dropdown?.classList.add(\"hidden\");\n this.#openDropdownAC?.abort();\n this.#openDropdownAC = null;\n }\n get #isDropdownVisible() {\n return this.#dropdown && !this.#dropdown.classList.contains(\"hidden\");\n }\n _hideDropdownFromKeyboard() {\n if (this.#isMainColorPicker) {\n return;\n }\n if (!this.#isDropdownVisible) {\n this.#editor?.unselect();\n return;\n }\n this.hideDropdown();\n this.#button.focus({\n preventScroll: true,\n focusVisible: this.#dropdownWasFromKeyboard\n });\n }\n updateColor(color) {\n if (this.#buttonSwatch) {\n this.#buttonSwatch.style.backgroundColor = color;\n }\n if (!this.#dropdown) {\n return;\n }\n const i = this.#uiManager.highlightColors.values();\n for (const child of this.#dropdown.children) {\n child.setAttribute(\"aria-selected\", i.next().value === color);\n }\n }\n destroy() {\n this.#button?.remove();\n this.#button = null;\n this.#buttonSwatch = null;\n this.#dropdown?.remove();\n this.#dropdown = null;\n }\n}\n\n;// ./src/display/editor/highlight.js\n\n\n\n\n\n\n\nclass HighlightEditor extends AnnotationEditor {\n #anchorNode = null;\n #anchorOffset = 0;\n #boxes;\n #clipPathId = null;\n #colorPicker = null;\n #focusOutlines = null;\n #focusNode = null;\n #focusOffset = 0;\n #highlightDiv = null;\n #highlightOutlines = null;\n #id = null;\n #isFreeHighlight = false;\n #lastPoint = null;\n #opacity;\n #outlineId = null;\n #text = \"\";\n #thickness;\n #methodOfCreation = \"\";\n static _defaultColor = null;\n static _defaultOpacity = 1;\n static _defaultThickness = 12;\n static _type = \"highlight\";\n static _editorType = AnnotationEditorType.HIGHLIGHT;\n static _freeHighlightId = -1;\n static _freeHighlight = null;\n static _freeHighlightClipId = \"\";\n static get _keyboardManager() {\n const proto = HighlightEditor.prototype;\n return shadow(this, \"_keyboardManager\", new KeyboardManager([[[\"ArrowLeft\", \"mac+ArrowLeft\"], proto._moveCaret, {\n args: [0]\n }], [[\"ArrowRight\", \"mac+ArrowRight\"], proto._moveCaret, {\n args: [1]\n }], [[\"ArrowUp\", \"mac+ArrowUp\"], proto._moveCaret, {\n args: [2]\n }], [[\"ArrowDown\", \"mac+ArrowDown\"], proto._moveCaret, {\n args: [3]\n }]]));\n }\n constructor(params) {\n super({\n ...params,\n name: \"highlightEditor\"\n });\n this.color = params.color || HighlightEditor._defaultColor;\n this.#thickness = params.thickness || HighlightEditor._defaultThickness;\n this.#opacity = params.opacity || HighlightEditor._defaultOpacity;\n this.#boxes = params.boxes || null;\n this.#methodOfCreation = params.methodOfCreation || \"\";\n this.#text = params.text || \"\";\n this._isDraggable = false;\n if (params.highlightId > -1) {\n this.#isFreeHighlight = true;\n this.#createFreeOutlines(params);\n this.#addToDrawLayer();\n } else if (this.#boxes) {\n this.#anchorNode = params.anchorNode;\n this.#anchorOffset = params.anchorOffset;\n this.#focusNode = params.focusNode;\n this.#focusOffset = params.focusOffset;\n this.#createOutlines();\n this.#addToDrawLayer();\n this.rotate(this.rotation);\n }\n }\n get telemetryInitialData() {\n return {\n action: \"added\",\n type: this.#isFreeHighlight ? \"free_highlight\" : \"highlight\",\n color: this._uiManager.highlightColorNames.get(this.color),\n thickness: this.#thickness,\n methodOfCreation: this.#methodOfCreation\n };\n }\n get telemetryFinalData() {\n return {\n type: \"highlight\",\n color: this._uiManager.highlightColorNames.get(this.color)\n };\n }\n static computeTelemetryFinalData(data) {\n return {\n numberOfColors: data.get(\"color\").size\n };\n }\n #createOutlines() {\n const outliner = new HighlightOutliner(this.#boxes, 0.001);\n this.#highlightOutlines = outliner.getOutlines();\n [this.x, this.y, this.width, this.height] = this.#highlightOutlines.box;\n const outlinerForOutline = new HighlightOutliner(this.#boxes, 0.0025, 0.001, this._uiManager.direction === \"ltr\");\n this.#focusOutlines = outlinerForOutline.getOutlines();\n const {\n lastPoint\n } = this.#focusOutlines;\n this.#lastPoint = [(lastPoint[0] - this.x) / this.width, (lastPoint[1] - this.y) / this.height];\n }\n #createFreeOutlines({\n highlightOutlines,\n highlightId,\n clipPathId\n }) {\n this.#highlightOutlines = highlightOutlines;\n const extraThickness = 1.5;\n this.#focusOutlines = highlightOutlines.getNewOutline(this.#thickness / 2 + extraThickness, 0.0025);\n if (highlightId >= 0) {\n this.#id = highlightId;\n this.#clipPathId = clipPathId;\n this.parent.drawLayer.finalizeDraw(highlightId, {\n bbox: highlightOutlines.box,\n path: {\n d: highlightOutlines.toSVGPath()\n }\n });\n this.#outlineId = this.parent.drawLayer.drawOutline({\n rootClass: {\n highlightOutline: true,\n free: true\n },\n bbox: this.#focusOutlines.box,\n path: {\n d: this.#focusOutlines.toSVGPath()\n }\n }, true);\n } else if (this.parent) {\n const angle = this.parent.viewport.rotation;\n this.parent.drawLayer.updateProperties(this.#id, {\n bbox: HighlightEditor.#rotateBbox(this.#highlightOutlines.box, (angle - this.rotation + 360) % 360),\n path: {\n d: highlightOutlines.toSVGPath()\n }\n });\n this.parent.drawLayer.updateProperties(this.#outlineId, {\n bbox: HighlightEditor.#rotateBbox(this.#focusOutlines.box, angle),\n path: {\n d: this.#focusOutlines.toSVGPath()\n }\n });\n }\n const [x, y, width, height] = highlightOutlines.box;\n switch (this.rotation) {\n case 0:\n this.x = x;\n this.y = y;\n this.width = width;\n this.height = height;\n break;\n case 90:\n {\n const [pageWidth, pageHeight] = this.parentDimensions;\n this.x = y;\n this.y = 1 - x;\n this.width = width * pageHeight / pageWidth;\n this.height = height * pageWidth / pageHeight;\n break;\n }\n case 180:\n this.x = 1 - x;\n this.y = 1 - y;\n this.width = width;\n this.height = height;\n break;\n case 270:\n {\n const [pageWidth, pageHeight] = this.parentDimensions;\n this.x = 1 - y;\n this.y = x;\n this.width = width * pageHeight / pageWidth;\n this.height = height * pageWidth / pageHeight;\n break;\n }\n }\n const {\n lastPoint\n } = this.#focusOutlines;\n this.#lastPoint = [(lastPoint[0] - x) / width, (lastPoint[1] - y) / height];\n }\n static initialize(l10n, uiManager) {\n AnnotationEditor.initialize(l10n, uiManager);\n HighlightEditor._defaultColor ||= uiManager.highlightColors?.values().next().value || \"#fff066\";\n }\n static updateDefaultParams(type, value) {\n switch (type) {\n case AnnotationEditorParamsType.HIGHLIGHT_DEFAULT_COLOR:\n HighlightEditor._defaultColor = value;\n break;\n case AnnotationEditorParamsType.HIGHLIGHT_THICKNESS:\n HighlightEditor._defaultThickness = value;\n break;\n }\n }\n translateInPage(x, y) {}\n get toolbarPosition() {\n return this.#lastPoint;\n }\n updateParams(type, value) {\n switch (type) {\n case AnnotationEditorParamsType.HIGHLIGHT_COLOR:\n this.#updateColor(value);\n break;\n case AnnotationEditorParamsType.HIGHLIGHT_THICKNESS:\n this.#updateThickness(value);\n break;\n }\n }\n static get defaultPropertiesToUpdate() {\n return [[AnnotationEditorParamsType.HIGHLIGHT_DEFAULT_COLOR, HighlightEditor._defaultColor], [AnnotationEditorParamsType.HIGHLIGHT_THICKNESS, HighlightEditor._defaultThickness]];\n }\n get propertiesToUpdate() {\n return [[AnnotationEditorParamsType.HIGHLIGHT_COLOR, this.color || HighlightEditor._defaultColor], [AnnotationEditorParamsType.HIGHLIGHT_THICKNESS, this.#thickness || HighlightEditor._defaultThickness], [AnnotationEditorParamsType.HIGHLIGHT_FREE, this.#isFreeHighlight]];\n }\n #updateColor(color) {\n const setColorAndOpacity = (col, opa) => {\n this.color = col;\n this.#opacity = opa;\n this.parent?.drawLayer.updateProperties(this.#id, {\n root: {\n fill: col,\n \"fill-opacity\": opa\n }\n });\n this.#colorPicker?.updateColor(col);\n };\n const savedColor = this.color;\n const savedOpacity = this.#opacity;\n this.addCommands({\n cmd: setColorAndOpacity.bind(this, color, HighlightEditor._defaultOpacity),\n undo: setColorAndOpacity.bind(this, savedColor, savedOpacity),\n post: this._uiManager.updateUI.bind(this._uiManager, this),\n mustExec: true,\n type: AnnotationEditorParamsType.HIGHLIGHT_COLOR,\n overwriteIfSameType: true,\n keepUndo: true\n });\n this._reportTelemetry({\n action: \"color_changed\",\n color: this._uiManager.highlightColorNames.get(color)\n }, true);\n }\n #updateThickness(thickness) {\n const savedThickness = this.#thickness;\n const setThickness = th => {\n this.#thickness = th;\n this.#changeThickness(th);\n };\n this.addCommands({\n cmd: setThickness.bind(this, thickness),\n undo: setThickness.bind(this, savedThickness),\n post: this._uiManager.updateUI.bind(this._uiManager, this),\n mustExec: true,\n type: AnnotationEditorParamsType.INK_THICKNESS,\n overwriteIfSameType: true,\n keepUndo: true\n });\n this._reportTelemetry({\n action: \"thickness_changed\",\n thickness\n }, true);\n }\n async addEditToolbar() {\n const toolbar = await super.addEditToolbar();\n if (!toolbar) {\n return null;\n }\n if (this._uiManager.highlightColors) {\n this.#colorPicker = new ColorPicker({\n editor: this\n });\n toolbar.addColorPicker(this.#colorPicker);\n }\n return toolbar;\n }\n disableEditing() {\n super.disableEditing();\n this.div.classList.toggle(\"disabled\", true);\n }\n enableEditing() {\n super.enableEditing();\n this.div.classList.toggle(\"disabled\", false);\n }\n fixAndSetPosition() {\n return super.fixAndSetPosition(this.#getRotation());\n }\n getBaseTranslation() {\n return [0, 0];\n }\n getRect(tx, ty) {\n return super.getRect(tx, ty, this.#getRotation());\n }\n onceAdded(focus) {\n if (!this.annotationElementId) {\n this.parent.addUndoableEditor(this);\n }\n if (focus) {\n this.div.focus();\n }\n }\n remove() {\n this.#cleanDrawLayer();\n this._reportTelemetry({\n action: \"deleted\"\n });\n super.remove();\n }\n rebuild() {\n if (!this.parent) {\n return;\n }\n super.rebuild();\n if (this.div === null) {\n return;\n }\n this.#addToDrawLayer();\n if (!this.isAttachedToDOM) {\n this.parent.add(this);\n }\n }\n setParent(parent) {\n let mustBeSelected = false;\n if (this.parent && !parent) {\n this.#cleanDrawLayer();\n } else if (parent) {\n this.#addToDrawLayer(parent);\n mustBeSelected = !this.parent && this.div?.classList.contains(\"selectedEditor\");\n }\n super.setParent(parent);\n this.show(this._isVisible);\n if (mustBeSelected) {\n this.select();\n }\n }\n #changeThickness(thickness) {\n if (!this.#isFreeHighlight) {\n return;\n }\n this.#createFreeOutlines({\n highlightOutlines: this.#highlightOutlines.getNewOutline(thickness / 2)\n });\n this.fixAndSetPosition();\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(this.width * parentWidth, this.height * parentHeight);\n }\n #cleanDrawLayer() {\n if (this.#id === null || !this.parent) {\n return;\n }\n this.parent.drawLayer.remove(this.#id);\n this.#id = null;\n this.parent.drawLayer.remove(this.#outlineId);\n this.#outlineId = null;\n }\n #addToDrawLayer(parent = this.parent) {\n if (this.#id !== null) {\n return;\n }\n ({\n id: this.#id,\n clipPathId: this.#clipPathId\n } = parent.drawLayer.draw({\n bbox: this.#highlightOutlines.box,\n root: {\n viewBox: \"0 0 1 1\",\n fill: this.color,\n \"fill-opacity\": this.#opacity\n },\n rootClass: {\n highlight: true,\n free: this.#isFreeHighlight\n },\n path: {\n d: this.#highlightOutlines.toSVGPath()\n }\n }, false, true));\n this.#outlineId = parent.drawLayer.drawOutline({\n rootClass: {\n highlightOutline: true,\n free: this.#isFreeHighlight\n },\n bbox: this.#focusOutlines.box,\n path: {\n d: this.#focusOutlines.toSVGPath()\n }\n }, this.#isFreeHighlight);\n if (this.#highlightDiv) {\n this.#highlightDiv.style.clipPath = this.#clipPathId;\n }\n }\n static #rotateBbox([x, y, width, height], angle) {\n switch (angle) {\n case 90:\n return [1 - y - height, x, height, width];\n case 180:\n return [1 - x - width, 1 - y - height, width, height];\n case 270:\n return [y, 1 - x - width, height, width];\n }\n return [x, y, width, height];\n }\n rotate(angle) {\n const {\n drawLayer\n } = this.parent;\n let box;\n if (this.#isFreeHighlight) {\n angle = (angle - this.rotation + 360) % 360;\n box = HighlightEditor.#rotateBbox(this.#highlightOutlines.box, angle);\n } else {\n box = HighlightEditor.#rotateBbox([this.x, this.y, this.width, this.height], angle);\n }\n drawLayer.updateProperties(this.#id, {\n bbox: box,\n root: {\n \"data-main-rotation\": angle\n }\n });\n drawLayer.updateProperties(this.#outlineId, {\n bbox: HighlightEditor.#rotateBbox(this.#focusOutlines.box, angle),\n root: {\n \"data-main-rotation\": angle\n }\n });\n }\n render() {\n if (this.div) {\n return this.div;\n }\n const div = super.render();\n if (this.#text) {\n div.setAttribute(\"aria-label\", this.#text);\n div.setAttribute(\"role\", \"mark\");\n }\n if (this.#isFreeHighlight) {\n div.classList.add(\"free\");\n } else {\n this.div.addEventListener(\"keydown\", this.#keydown.bind(this), {\n signal: this._uiManager._signal\n });\n }\n const highlightDiv = this.#highlightDiv = document.createElement(\"div\");\n div.append(highlightDiv);\n highlightDiv.setAttribute(\"aria-hidden\", \"true\");\n highlightDiv.className = \"internal\";\n highlightDiv.style.clipPath = this.#clipPathId;\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(this.width * parentWidth, this.height * parentHeight);\n bindEvents(this, this.#highlightDiv, [\"pointerover\", \"pointerleave\"]);\n this.enableEditing();\n return div;\n }\n pointerover() {\n if (!this.isSelected) {\n this.parent?.drawLayer.updateProperties(this.#outlineId, {\n rootClass: {\n hovered: true\n }\n });\n }\n }\n pointerleave() {\n if (!this.isSelected) {\n this.parent?.drawLayer.updateProperties(this.#outlineId, {\n rootClass: {\n hovered: false\n }\n });\n }\n }\n #keydown(event) {\n HighlightEditor._keyboardManager.exec(this, event);\n }\n _moveCaret(direction) {\n this.parent.unselect(this);\n switch (direction) {\n case 0:\n case 2:\n this.#setCaret(true);\n break;\n case 1:\n case 3:\n this.#setCaret(false);\n break;\n }\n }\n #setCaret(start) {\n if (!this.#anchorNode) {\n return;\n }\n const selection = window.getSelection();\n if (start) {\n selection.setPosition(this.#anchorNode, this.#anchorOffset);\n } else {\n selection.setPosition(this.#focusNode, this.#focusOffset);\n }\n }\n select() {\n super.select();\n if (!this.#outlineId) {\n return;\n }\n this.parent?.drawLayer.updateProperties(this.#outlineId, {\n rootClass: {\n hovered: false,\n selected: true\n }\n });\n }\n unselect() {\n super.unselect();\n if (!this.#outlineId) {\n return;\n }\n this.parent?.drawLayer.updateProperties(this.#outlineId, {\n rootClass: {\n selected: false\n }\n });\n if (!this.#isFreeHighlight) {\n this.#setCaret(false);\n }\n }\n get _mustFixPosition() {\n return !this.#isFreeHighlight;\n }\n show(visible = this._isVisible) {\n super.show(visible);\n if (this.parent) {\n this.parent.drawLayer.updateProperties(this.#id, {\n rootClass: {\n hidden: !visible\n }\n });\n this.parent.drawLayer.updateProperties(this.#outlineId, {\n rootClass: {\n hidden: !visible\n }\n });\n }\n }\n #getRotation() {\n return this.#isFreeHighlight ? this.rotation : 0;\n }\n #serializeBoxes() {\n if (this.#isFreeHighlight) {\n return null;\n }\n const [pageWidth, pageHeight] = this.pageDimensions;\n const [pageX, pageY] = this.pageTranslation;\n const boxes = this.#boxes;\n const quadPoints = new Float32Array(boxes.length * 8);\n let i = 0;\n for (const {\n x,\n y,\n width,\n height\n } of boxes) {\n const sx = x * pageWidth + pageX;\n const sy = (1 - y) * pageHeight + pageY;\n quadPoints[i] = quadPoints[i + 4] = sx;\n quadPoints[i + 1] = quadPoints[i + 3] = sy;\n quadPoints[i + 2] = quadPoints[i + 6] = sx + width * pageWidth;\n quadPoints[i + 5] = quadPoints[i + 7] = sy - height * pageHeight;\n i += 8;\n }\n return quadPoints;\n }\n #serializeOutlines(rect) {\n return this.#highlightOutlines.serialize(rect, this.#getRotation());\n }\n static startHighlighting(parent, isLTR, {\n target: textLayer,\n x,\n y\n }) {\n const {\n x: layerX,\n y: layerY,\n width: parentWidth,\n height: parentHeight\n } = textLayer.getBoundingClientRect();\n const ac = new AbortController();\n const signal = parent.combinedSignal(ac);\n const pointerUpCallback = e => {\n ac.abort();\n this.#endHighlight(parent, e);\n };\n window.addEventListener(\"blur\", pointerUpCallback, {\n signal\n });\n window.addEventListener(\"pointerup\", pointerUpCallback, {\n signal\n });\n window.addEventListener(\"pointerdown\", stopEvent, {\n capture: true,\n passive: false,\n signal\n });\n window.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n textLayer.addEventListener(\"pointermove\", this.#highlightMove.bind(this, parent), {\n signal\n });\n this._freeHighlight = new FreeHighlightOutliner({\n x,\n y\n }, [layerX, layerY, parentWidth, parentHeight], parent.scale, this._defaultThickness / 2, isLTR, 0.001);\n ({\n id: this._freeHighlightId,\n clipPathId: this._freeHighlightClipId\n } = parent.drawLayer.draw({\n bbox: [0, 0, 1, 1],\n root: {\n viewBox: \"0 0 1 1\",\n fill: this._defaultColor,\n \"fill-opacity\": this._defaultOpacity\n },\n rootClass: {\n highlight: true,\n free: true\n },\n path: {\n d: this._freeHighlight.toSVGPath()\n }\n }, true, true));\n }\n static #highlightMove(parent, event) {\n if (this._freeHighlight.add(event)) {\n parent.drawLayer.updateProperties(this._freeHighlightId, {\n path: {\n d: this._freeHighlight.toSVGPath()\n }\n });\n }\n }\n static #endHighlight(parent, event) {\n if (!this._freeHighlight.isEmpty()) {\n parent.createAndAddNewEditor(event, false, {\n highlightId: this._freeHighlightId,\n highlightOutlines: this._freeHighlight.getOutlines(),\n clipPathId: this._freeHighlightClipId,\n methodOfCreation: \"main_toolbar\"\n });\n } else {\n parent.drawLayer.remove(this._freeHighlightId);\n }\n this._freeHighlightId = -1;\n this._freeHighlight = null;\n this._freeHighlightClipId = \"\";\n }\n static async deserialize(data, parent, uiManager) {\n let initialData = null;\n if (data instanceof HighlightAnnotationElement) {\n const {\n data: {\n quadPoints,\n rect,\n rotation,\n id,\n color,\n opacity,\n popupRef\n },\n parent: {\n page: {\n pageNumber\n }\n }\n } = data;\n initialData = data = {\n annotationType: AnnotationEditorType.HIGHLIGHT,\n color: Array.from(color),\n opacity,\n quadPoints,\n boxes: null,\n pageIndex: pageNumber - 1,\n rect: rect.slice(0),\n rotation,\n id,\n deleted: false,\n popupRef\n };\n } else if (data instanceof InkAnnotationElement) {\n const {\n data: {\n inkLists,\n rect,\n rotation,\n id,\n color,\n borderStyle: {\n rawWidth: thickness\n },\n popupRef\n },\n parent: {\n page: {\n pageNumber\n }\n }\n } = data;\n initialData = data = {\n annotationType: AnnotationEditorType.HIGHLIGHT,\n color: Array.from(color),\n thickness,\n inkLists,\n boxes: null,\n pageIndex: pageNumber - 1,\n rect: rect.slice(0),\n rotation,\n id,\n deleted: false,\n popupRef\n };\n }\n const {\n color,\n quadPoints,\n inkLists,\n opacity\n } = data;\n const editor = await super.deserialize(data, parent, uiManager);\n editor.color = Util.makeHexColor(...color);\n editor.#opacity = opacity || 1;\n if (inkLists) {\n editor.#thickness = data.thickness;\n }\n editor.annotationElementId = data.id || null;\n editor._initialData = initialData;\n const [pageWidth, pageHeight] = editor.pageDimensions;\n const [pageX, pageY] = editor.pageTranslation;\n if (quadPoints) {\n const boxes = editor.#boxes = [];\n for (let i = 0; i < quadPoints.length; i += 8) {\n boxes.push({\n x: (quadPoints[i] - pageX) / pageWidth,\n y: 1 - (quadPoints[i + 1] - pageY) / pageHeight,\n width: (quadPoints[i + 2] - quadPoints[i]) / pageWidth,\n height: (quadPoints[i + 1] - quadPoints[i + 5]) / pageHeight\n });\n }\n editor.#createOutlines();\n editor.#addToDrawLayer();\n editor.rotate(editor.rotation);\n } else if (inkLists) {\n editor.#isFreeHighlight = true;\n const points = inkLists[0];\n const point = {\n x: points[0] - pageX,\n y: pageHeight - (points[1] - pageY)\n };\n const outliner = new FreeHighlightOutliner(point, [0, 0, pageWidth, pageHeight], 1, editor.#thickness / 2, true, 0.001);\n for (let i = 0, ii = points.length; i < ii; i += 2) {\n point.x = points[i] - pageX;\n point.y = pageHeight - (points[i + 1] - pageY);\n outliner.add(point);\n }\n const {\n id,\n clipPathId\n } = parent.drawLayer.draw({\n bbox: [0, 0, 1, 1],\n root: {\n viewBox: \"0 0 1 1\",\n fill: editor.color,\n \"fill-opacity\": editor._defaultOpacity\n },\n rootClass: {\n highlight: true,\n free: true\n },\n path: {\n d: outliner.toSVGPath()\n }\n }, true, true);\n editor.#createFreeOutlines({\n highlightOutlines: outliner.getOutlines(),\n highlightId: id,\n clipPathId\n });\n editor.#addToDrawLayer();\n }\n return editor;\n }\n serialize(isForCopying = false) {\n if (this.isEmpty() || isForCopying) {\n return null;\n }\n if (this.deleted) {\n return this.serializeDeleted();\n }\n const rect = this.getRect(0, 0);\n const color = AnnotationEditor._colorManager.convert(this.color);\n const serialized = {\n annotationType: AnnotationEditorType.HIGHLIGHT,\n color,\n opacity: this.#opacity,\n thickness: this.#thickness,\n quadPoints: this.#serializeBoxes(),\n outlines: this.#serializeOutlines(rect),\n pageIndex: this.pageIndex,\n rect,\n rotation: this.#getRotation(),\n structTreeParentId: this._structTreeParentId\n };\n if (this.annotationElementId && !this.#hasElementChanged(serialized)) {\n return null;\n }\n serialized.id = this.annotationElementId;\n return serialized;\n }\n #hasElementChanged(serialized) {\n const {\n color\n } = this._initialData;\n return serialized.color.some((c, i) => c !== color[i]);\n }\n renderAnnotationElement(annotation) {\n annotation.updateEdited({\n rect: this.getRect(0, 0)\n });\n return null;\n }\n static canCreateNewEmptyEditor() {\n return false;\n }\n}\n\n;// ./src/display/editor/draw.js\n\n\n\nclass DrawingOptions {\n #svgProperties = Object.create(null);\n updateProperty(name, value) {\n this[name] = value;\n this.updateSVGProperty(name, value);\n }\n updateProperties(properties) {\n if (!properties) {\n return;\n }\n for (const [name, value] of Object.entries(properties)) {\n this.updateProperty(name, value);\n }\n }\n updateSVGProperty(name, value) {\n this.#svgProperties[name] = value;\n }\n toSVGProperties() {\n const root = this.#svgProperties;\n this.#svgProperties = Object.create(null);\n return {\n root\n };\n }\n reset() {\n this.#svgProperties = Object.create(null);\n }\n updateAll(options = this) {\n this.updateProperties(options);\n }\n clone() {\n unreachable(\"Not implemented\");\n }\n}\nclass DrawingEditor extends AnnotationEditor {\n #drawOutlines = null;\n #mustBeCommitted;\n _drawId = null;\n static _currentDrawId = -1;\n static _currentParent = null;\n static #currentDraw = null;\n static #currentDrawingAC = null;\n static #currentDrawingOptions = null;\n static #currentPointerId = NaN;\n static #currentPointerType = null;\n static #currentPointerIds = null;\n static #currentMoveTimestamp = NaN;\n static _INNER_MARGIN = 3;\n constructor(params) {\n super(params);\n this.#mustBeCommitted = params.mustBeCommitted || false;\n if (params.drawOutlines) {\n this.#createDrawOutlines(params);\n this.#addToDrawLayer();\n }\n }\n #createDrawOutlines({\n drawOutlines,\n drawId,\n drawingOptions\n }) {\n this.#drawOutlines = drawOutlines;\n this._drawingOptions ||= drawingOptions;\n if (drawId >= 0) {\n this._drawId = drawId;\n this.parent.drawLayer.finalizeDraw(drawId, drawOutlines.defaultProperties);\n } else {\n this._drawId = this.#createDrawing(drawOutlines, this.parent);\n }\n this.#updateBbox(drawOutlines.box);\n }\n #createDrawing(drawOutlines, parent) {\n const {\n id\n } = parent.drawLayer.draw(DrawingEditor._mergeSVGProperties(this._drawingOptions.toSVGProperties(), drawOutlines.defaultSVGProperties), false, false);\n return id;\n }\n static _mergeSVGProperties(p1, p2) {\n const p1Keys = new Set(Object.keys(p1));\n for (const [key, value] of Object.entries(p2)) {\n if (p1Keys.has(key)) {\n Object.assign(p1[key], value);\n } else {\n p1[key] = value;\n }\n }\n return p1;\n }\n static getDefaultDrawingOptions(_options) {\n unreachable(\"Not implemented\");\n }\n static get typesMap() {\n unreachable(\"Not implemented\");\n }\n static get isDrawer() {\n return true;\n }\n static get supportMultipleDrawings() {\n return false;\n }\n static updateDefaultParams(type, value) {\n const propertyName = this.typesMap.get(type);\n if (propertyName) {\n this._defaultDrawingOptions.updateProperty(propertyName, value);\n }\n if (this._currentParent) {\n DrawingEditor.#currentDraw.updateProperty(propertyName, value);\n this._currentParent.drawLayer.updateProperties(this._currentDrawId, this._defaultDrawingOptions.toSVGProperties());\n }\n }\n updateParams(type, value) {\n const propertyName = this.constructor.typesMap.get(type);\n if (propertyName) {\n this._updateProperty(type, propertyName, value);\n }\n }\n static get defaultPropertiesToUpdate() {\n const properties = [];\n const options = this._defaultDrawingOptions;\n for (const [type, name] of this.typesMap) {\n properties.push([type, options[name]]);\n }\n return properties;\n }\n get propertiesToUpdate() {\n const properties = [];\n const {\n _drawingOptions\n } = this;\n for (const [type, name] of this.constructor.typesMap) {\n properties.push([type, _drawingOptions[name]]);\n }\n return properties;\n }\n _updateProperty(type, name, value) {\n const options = this._drawingOptions;\n const savedValue = options[name];\n const setter = val => {\n options.updateProperty(name, val);\n const bbox = this.#drawOutlines.updateProperty(name, val);\n if (bbox) {\n this.#updateBbox(bbox);\n }\n this.parent?.drawLayer.updateProperties(this._drawId, options.toSVGProperties());\n };\n this.addCommands({\n cmd: setter.bind(this, value),\n undo: setter.bind(this, savedValue),\n post: this._uiManager.updateUI.bind(this._uiManager, this),\n mustExec: true,\n type,\n overwriteIfSameType: true,\n keepUndo: true\n });\n }\n _onResizing() {\n this.parent?.drawLayer.updateProperties(this._drawId, DrawingEditor._mergeSVGProperties(this.#drawOutlines.getPathResizingSVGProperties(this.#convertToDrawSpace()), {\n bbox: this.#rotateBox()\n }));\n }\n _onResized() {\n this.parent?.drawLayer.updateProperties(this._drawId, DrawingEditor._mergeSVGProperties(this.#drawOutlines.getPathResizedSVGProperties(this.#convertToDrawSpace()), {\n bbox: this.#rotateBox()\n }));\n }\n _onTranslating(x, y) {\n this.parent?.drawLayer.updateProperties(this._drawId, {\n bbox: this.#rotateBox(x, y)\n });\n }\n _onTranslated() {\n this.parent?.drawLayer.updateProperties(this._drawId, DrawingEditor._mergeSVGProperties(this.#drawOutlines.getPathTranslatedSVGProperties(this.#convertToDrawSpace(), this.parentDimensions), {\n bbox: this.#rotateBox()\n }));\n }\n _onStartDragging() {\n this.parent?.drawLayer.updateProperties(this._drawId, {\n rootClass: {\n moving: true\n }\n });\n }\n _onStopDragging() {\n this.parent?.drawLayer.updateProperties(this._drawId, {\n rootClass: {\n moving: false\n }\n });\n }\n commit() {\n super.commit();\n this.disableEditMode();\n this.disableEditing();\n }\n disableEditing() {\n super.disableEditing();\n this.div.classList.toggle(\"disabled\", true);\n }\n enableEditing() {\n super.enableEditing();\n this.div.classList.toggle(\"disabled\", false);\n }\n getBaseTranslation() {\n return [0, 0];\n }\n get isResizable() {\n return true;\n }\n onceAdded(focus) {\n if (!this.annotationElementId) {\n this.parent.addUndoableEditor(this);\n }\n this._isDraggable = true;\n if (this.#mustBeCommitted) {\n this.#mustBeCommitted = false;\n this.commit();\n this.parent.setSelected(this);\n if (focus && this.isOnScreen) {\n this.div.focus();\n }\n }\n }\n remove() {\n this.#cleanDrawLayer();\n super.remove();\n }\n rebuild() {\n if (!this.parent) {\n return;\n }\n super.rebuild();\n if (this.div === null) {\n return;\n }\n this.#addToDrawLayer();\n this.#updateBbox(this.#drawOutlines.box);\n if (!this.isAttachedToDOM) {\n this.parent.add(this);\n }\n }\n setParent(parent) {\n let mustBeSelected = false;\n if (this.parent && !parent) {\n this._uiManager.removeShouldRescale(this);\n this.#cleanDrawLayer();\n } else if (parent) {\n this._uiManager.addShouldRescale(this);\n this.#addToDrawLayer(parent);\n mustBeSelected = !this.parent && this.div?.classList.contains(\"selectedEditor\");\n }\n super.setParent(parent);\n if (mustBeSelected) {\n this.select();\n }\n }\n #cleanDrawLayer() {\n if (this._drawId === null || !this.parent) {\n return;\n }\n this.parent.drawLayer.remove(this._drawId);\n this._drawId = null;\n this._drawingOptions.reset();\n }\n #addToDrawLayer(parent = this.parent) {\n if (this._drawId !== null && this.parent === parent) {\n return;\n }\n if (this._drawId !== null) {\n this.parent.drawLayer.updateParent(this._drawId, parent.drawLayer);\n return;\n }\n this._drawingOptions.updateAll();\n this._drawId = this.#createDrawing(this.#drawOutlines, parent);\n }\n #convertToParentSpace([x, y, width, height]) {\n const {\n parentDimensions: [pW, pH],\n rotation\n } = this;\n switch (rotation) {\n case 90:\n return [y, 1 - x, width * (pH / pW), height * (pW / pH)];\n case 180:\n return [1 - x, 1 - y, width, height];\n case 270:\n return [1 - y, x, width * (pH / pW), height * (pW / pH)];\n default:\n return [x, y, width, height];\n }\n }\n #convertToDrawSpace() {\n const {\n x,\n y,\n width,\n height,\n parentDimensions: [pW, pH],\n rotation\n } = this;\n switch (rotation) {\n case 90:\n return [1 - y, x, width * (pW / pH), height * (pH / pW)];\n case 180:\n return [1 - x, 1 - y, width, height];\n case 270:\n return [y, 1 - x, width * (pW / pH), height * (pH / pW)];\n default:\n return [x, y, width, height];\n }\n }\n #updateBbox(bbox) {\n [this.x, this.y, this.width, this.height] = this.#convertToParentSpace(bbox);\n if (this.div) {\n this.fixAndSetPosition();\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(this.width * parentWidth, this.height * parentHeight);\n }\n this._onResized();\n }\n #rotateBox() {\n const {\n x,\n y,\n width,\n height,\n rotation,\n parentRotation,\n parentDimensions: [pW, pH]\n } = this;\n switch ((rotation * 4 + parentRotation) / 90) {\n case 1:\n return [1 - y - height, x, height, width];\n case 2:\n return [1 - x - width, 1 - y - height, width, height];\n case 3:\n return [y, 1 - x - width, height, width];\n case 4:\n return [x, y - width * (pW / pH), height * (pH / pW), width * (pW / pH)];\n case 5:\n return [1 - y, x, width * (pW / pH), height * (pH / pW)];\n case 6:\n return [1 - x - height * (pH / pW), 1 - y, height * (pH / pW), width * (pW / pH)];\n case 7:\n return [y - width * (pW / pH), 1 - x - height * (pH / pW), width * (pW / pH), height * (pH / pW)];\n case 8:\n return [x - width, y - height, width, height];\n case 9:\n return [1 - y, x - width, height, width];\n case 10:\n return [1 - x, 1 - y, width, height];\n case 11:\n return [y - height, 1 - x, height, width];\n case 12:\n return [x - height * (pH / pW), y, height * (pH / pW), width * (pW / pH)];\n case 13:\n return [1 - y - width * (pW / pH), x - height * (pH / pW), width * (pW / pH), height * (pH / pW)];\n case 14:\n return [1 - x, 1 - y - width * (pW / pH), height * (pH / pW), width * (pW / pH)];\n case 15:\n return [y, 1 - x, width * (pW / pH), height * (pH / pW)];\n default:\n return [x, y, width, height];\n }\n }\n rotate() {\n if (!this.parent) {\n return;\n }\n this.parent.drawLayer.updateProperties(this._drawId, DrawingEditor._mergeSVGProperties({\n bbox: this.#rotateBox()\n }, this.#drawOutlines.updateRotation((this.parentRotation - this.rotation + 360) % 360)));\n }\n onScaleChanging() {\n if (!this.parent) {\n return;\n }\n this.#updateBbox(this.#drawOutlines.updateParentDimensions(this.parentDimensions, this.parent.scale));\n }\n static onScaleChangingWhenDrawing() {}\n render() {\n if (this.div) {\n return this.div;\n }\n const div = super.render();\n div.classList.add(\"draw\");\n const drawDiv = document.createElement(\"div\");\n div.append(drawDiv);\n drawDiv.setAttribute(\"aria-hidden\", \"true\");\n drawDiv.className = \"internal\";\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(this.width * parentWidth, this.height * parentHeight);\n this._uiManager.addShouldRescale(this);\n this.disableEditing();\n return div;\n }\n static createDrawerInstance(_x, _y, _parentWidth, _parentHeight, _rotation) {\n unreachable(\"Not implemented\");\n }\n static startDrawing(parent, uiManager, _isLTR, event) {\n const {\n target,\n offsetX: x,\n offsetY: y,\n pointerId,\n pointerType\n } = event;\n if (DrawingEditor.#currentPointerType && DrawingEditor.#currentPointerType !== pointerType) {\n return;\n }\n const {\n viewport: {\n rotation\n }\n } = parent;\n const {\n width: parentWidth,\n height: parentHeight\n } = target.getBoundingClientRect();\n const ac = DrawingEditor.#currentDrawingAC = new AbortController();\n const signal = parent.combinedSignal(ac);\n DrawingEditor.#currentPointerId ||= pointerId;\n DrawingEditor.#currentPointerType ??= pointerType;\n window.addEventListener(\"pointerup\", e => {\n if (DrawingEditor.#currentPointerId === e.pointerId) {\n this._endDraw(e);\n } else {\n DrawingEditor.#currentPointerIds?.delete(e.pointerId);\n }\n }, {\n signal\n });\n window.addEventListener(\"pointercancel\", e => {\n if (DrawingEditor.#currentPointerId === e.pointerId) {\n this._currentParent.endDrawingSession();\n } else {\n DrawingEditor.#currentPointerIds?.delete(e.pointerId);\n }\n }, {\n signal\n });\n window.addEventListener(\"pointerdown\", e => {\n if (DrawingEditor.#currentPointerType !== e.pointerType) {\n return;\n }\n (DrawingEditor.#currentPointerIds ||= new Set()).add(e.pointerId);\n if (DrawingEditor.#currentDraw.isCancellable()) {\n DrawingEditor.#currentDraw.removeLastElement();\n if (DrawingEditor.#currentDraw.isEmpty()) {\n this._currentParent.endDrawingSession(true);\n } else {\n this._endDraw(null);\n }\n }\n }, {\n capture: true,\n passive: false,\n signal\n });\n window.addEventListener(\"contextmenu\", noContextMenu, {\n signal\n });\n target.addEventListener(\"pointermove\", this._drawMove.bind(this), {\n signal\n });\n target.addEventListener(\"touchmove\", e => {\n if (e.timeStamp === DrawingEditor.#currentMoveTimestamp) {\n stopEvent(e);\n }\n }, {\n signal\n });\n parent.toggleDrawing();\n uiManager._editorUndoBar?.hide();\n if (DrawingEditor.#currentDraw) {\n parent.drawLayer.updateProperties(this._currentDrawId, DrawingEditor.#currentDraw.startNew(x, y, parentWidth, parentHeight, rotation));\n return;\n }\n uiManager.updateUIForDefaultProperties(this);\n DrawingEditor.#currentDraw = this.createDrawerInstance(x, y, parentWidth, parentHeight, rotation);\n DrawingEditor.#currentDrawingOptions = this.getDefaultDrawingOptions();\n this._currentParent = parent;\n ({\n id: this._currentDrawId\n } = parent.drawLayer.draw(this._mergeSVGProperties(DrawingEditor.#currentDrawingOptions.toSVGProperties(), DrawingEditor.#currentDraw.defaultSVGProperties), true, false));\n }\n static _drawMove(event) {\n DrawingEditor.#currentMoveTimestamp = -1;\n if (!DrawingEditor.#currentDraw) {\n return;\n }\n const {\n offsetX,\n offsetY,\n pointerId\n } = event;\n if (DrawingEditor.#currentPointerId !== pointerId) {\n return;\n }\n if (DrawingEditor.#currentPointerIds?.size >= 1) {\n this._endDraw(event);\n return;\n }\n this._currentParent.drawLayer.updateProperties(this._currentDrawId, DrawingEditor.#currentDraw.add(offsetX, offsetY));\n DrawingEditor.#currentMoveTimestamp = event.timeStamp;\n stopEvent(event);\n }\n static _cleanup(all) {\n if (all) {\n this._currentDrawId = -1;\n this._currentParent = null;\n DrawingEditor.#currentDraw = null;\n DrawingEditor.#currentDrawingOptions = null;\n DrawingEditor.#currentPointerType = null;\n DrawingEditor.#currentMoveTimestamp = NaN;\n }\n if (DrawingEditor.#currentDrawingAC) {\n DrawingEditor.#currentDrawingAC.abort();\n DrawingEditor.#currentDrawingAC = null;\n DrawingEditor.#currentPointerId = NaN;\n DrawingEditor.#currentPointerIds = null;\n }\n }\n static _endDraw(event) {\n const parent = this._currentParent;\n if (!parent) {\n return;\n }\n parent.toggleDrawing(true);\n this._cleanup(false);\n if (event) {\n parent.drawLayer.updateProperties(this._currentDrawId, DrawingEditor.#currentDraw.end(event.offsetX, event.offsetY));\n }\n if (this.supportMultipleDrawings) {\n const draw = DrawingEditor.#currentDraw;\n const drawId = this._currentDrawId;\n const lastElement = draw.getLastElement();\n parent.addCommands({\n cmd: () => {\n parent.drawLayer.updateProperties(drawId, draw.setLastElement(lastElement));\n },\n undo: () => {\n parent.drawLayer.updateProperties(drawId, draw.removeLastElement());\n },\n mustExec: false,\n type: AnnotationEditorParamsType.DRAW_STEP\n });\n return;\n }\n this.endDrawing(false);\n }\n static endDrawing(isAborted) {\n const parent = this._currentParent;\n if (!parent) {\n return null;\n }\n parent.toggleDrawing(true);\n parent.cleanUndoStack(AnnotationEditorParamsType.DRAW_STEP);\n if (!DrawingEditor.#currentDraw.isEmpty()) {\n const {\n pageDimensions: [pageWidth, pageHeight],\n scale\n } = parent;\n const editor = parent.createAndAddNewEditor({\n offsetX: 0,\n offsetY: 0\n }, false, {\n drawId: this._currentDrawId,\n drawOutlines: DrawingEditor.#currentDraw.getOutlines(pageWidth * scale, pageHeight * scale, scale, this._INNER_MARGIN),\n drawingOptions: DrawingEditor.#currentDrawingOptions,\n mustBeCommitted: !isAborted\n });\n this._cleanup(true);\n return editor;\n }\n parent.drawLayer.remove(this._currentDrawId);\n this._cleanup(true);\n return null;\n }\n createDrawingOptions(_data) {}\n static deserializeDraw(_pageX, _pageY, _pageWidth, _pageHeight, _innerWidth, _data) {\n unreachable(\"Not implemented\");\n }\n static async deserialize(data, parent, uiManager) {\n const {\n rawDims: {\n pageWidth,\n pageHeight,\n pageX,\n pageY\n }\n } = parent.viewport;\n const drawOutlines = this.deserializeDraw(pageX, pageY, pageWidth, pageHeight, this._INNER_MARGIN, data);\n const editor = await super.deserialize(data, parent, uiManager);\n editor.createDrawingOptions(data);\n editor.#createDrawOutlines({\n drawOutlines\n });\n editor.#addToDrawLayer();\n editor.onScaleChanging();\n editor.rotate();\n return editor;\n }\n serializeDraw(isForCopying) {\n const [pageX, pageY] = this.pageTranslation;\n const [pageWidth, pageHeight] = this.pageDimensions;\n return this.#drawOutlines.serialize([pageX, pageY, pageWidth, pageHeight], isForCopying);\n }\n renderAnnotationElement(annotation) {\n annotation.updateEdited({\n rect: this.getRect(0, 0)\n });\n return null;\n }\n static canCreateNewEmptyEditor() {\n return false;\n }\n}\n\n;// ./src/display/editor/drawers/inkdraw.js\n\n\nclass InkDrawOutliner {\n #last = new Float64Array(6);\n #line;\n #lines;\n #rotation;\n #thickness;\n #points;\n #lastSVGPath = \"\";\n #lastIndex = 0;\n #outlines = new InkDrawOutline();\n #parentWidth;\n #parentHeight;\n constructor(x, y, parentWidth, parentHeight, rotation, thickness) {\n this.#parentWidth = parentWidth;\n this.#parentHeight = parentHeight;\n this.#rotation = rotation;\n this.#thickness = thickness;\n [x, y] = this.#normalizePoint(x, y);\n const line = this.#line = [NaN, NaN, NaN, NaN, x, y];\n this.#points = [x, y];\n this.#lines = [{\n line,\n points: this.#points\n }];\n this.#last.set(line, 0);\n }\n updateProperty(name, value) {\n if (name === \"stroke-width\") {\n this.#thickness = value;\n }\n }\n #normalizePoint(x, y) {\n return Outline._normalizePoint(x, y, this.#parentWidth, this.#parentHeight, this.#rotation);\n }\n isEmpty() {\n return !this.#lines || this.#lines.length === 0;\n }\n isCancellable() {\n return this.#points.length <= 10;\n }\n add(x, y) {\n [x, y] = this.#normalizePoint(x, y);\n const [x1, y1, x2, y2] = this.#last.subarray(2, 6);\n const diffX = x - x2;\n const diffY = y - y2;\n const d = Math.hypot(this.#parentWidth * diffX, this.#parentHeight * diffY);\n if (d <= 2) {\n return null;\n }\n this.#points.push(x, y);\n if (isNaN(x1)) {\n this.#last.set([x2, y2, x, y], 2);\n this.#line.push(NaN, NaN, NaN, NaN, x, y);\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n if (isNaN(this.#last[0])) {\n this.#line.splice(6, 6);\n }\n this.#last.set([x1, y1, x2, y2, x, y], 0);\n this.#line.push(...Outline.createBezierPoints(x1, y1, x2, y2, x, y));\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n end(x, y) {\n const change = this.add(x, y);\n if (change) {\n return change;\n }\n if (this.#points.length === 2) {\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n return null;\n }\n startNew(x, y, parentWidth, parentHeight, rotation) {\n this.#parentWidth = parentWidth;\n this.#parentHeight = parentHeight;\n this.#rotation = rotation;\n [x, y] = this.#normalizePoint(x, y);\n const line = this.#line = [NaN, NaN, NaN, NaN, x, y];\n this.#points = [x, y];\n const last = this.#lines.at(-1);\n if (last) {\n last.line = new Float32Array(last.line);\n last.points = new Float32Array(last.points);\n }\n this.#lines.push({\n line,\n points: this.#points\n });\n this.#last.set(line, 0);\n this.#lastIndex = 0;\n this.toSVGPath();\n return null;\n }\n getLastElement() {\n return this.#lines.at(-1);\n }\n setLastElement(element) {\n if (!this.#lines) {\n return this.#outlines.setLastElement(element);\n }\n this.#lines.push(element);\n this.#line = element.line;\n this.#points = element.points;\n this.#lastIndex = 0;\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n removeLastElement() {\n if (!this.#lines) {\n return this.#outlines.removeLastElement();\n }\n this.#lines.pop();\n this.#lastSVGPath = \"\";\n for (let i = 0, ii = this.#lines.length; i < ii; i++) {\n const {\n line,\n points\n } = this.#lines[i];\n this.#line = line;\n this.#points = points;\n this.#lastIndex = 0;\n this.toSVGPath();\n }\n return {\n path: {\n d: this.#lastSVGPath\n }\n };\n }\n toSVGPath() {\n const firstX = Outline.svgRound(this.#line[4]);\n const firstY = Outline.svgRound(this.#line[5]);\n if (this.#points.length === 2) {\n this.#lastSVGPath = `${this.#lastSVGPath} M ${firstX} ${firstY} Z`;\n return this.#lastSVGPath;\n }\n if (this.#points.length <= 6) {\n const i = this.#lastSVGPath.lastIndexOf(\"M\");\n this.#lastSVGPath = `${this.#lastSVGPath.slice(0, i)} M ${firstX} ${firstY}`;\n this.#lastIndex = 6;\n }\n if (this.#points.length === 4) {\n const secondX = Outline.svgRound(this.#line[10]);\n const secondY = Outline.svgRound(this.#line[11]);\n this.#lastSVGPath = `${this.#lastSVGPath} L ${secondX} ${secondY}`;\n this.#lastIndex = 12;\n return this.#lastSVGPath;\n }\n const buffer = [];\n if (this.#lastIndex === 0) {\n buffer.push(`M ${firstX} ${firstY}`);\n this.#lastIndex = 6;\n }\n for (let i = this.#lastIndex, ii = this.#line.length; i < ii; i += 6) {\n const [c1x, c1y, c2x, c2y, x, y] = this.#line.slice(i, i + 6).map(Outline.svgRound);\n buffer.push(`C${c1x} ${c1y} ${c2x} ${c2y} ${x} ${y}`);\n }\n this.#lastSVGPath += buffer.join(\" \");\n this.#lastIndex = this.#line.length;\n return this.#lastSVGPath;\n }\n getOutlines(parentWidth, parentHeight, scale, innerMargin) {\n const last = this.#lines.at(-1);\n last.line = new Float32Array(last.line);\n last.points = new Float32Array(last.points);\n this.#outlines.build(this.#lines, parentWidth, parentHeight, scale, this.#rotation, this.#thickness, innerMargin);\n this.#last = null;\n this.#line = null;\n this.#lines = null;\n this.#lastSVGPath = null;\n return this.#outlines;\n }\n get defaultSVGProperties() {\n return {\n root: {\n viewBox: \"0 0 10000 10000\"\n },\n rootClass: {\n draw: true\n },\n bbox: [0, 0, 1, 1]\n };\n }\n}\nclass InkDrawOutline extends Outline {\n #bbox;\n #currentRotation = 0;\n #innerMargin;\n #lines;\n #parentWidth;\n #parentHeight;\n #parentScale;\n #rotation;\n #thickness;\n build(lines, parentWidth, parentHeight, parentScale, rotation, thickness, innerMargin) {\n this.#parentWidth = parentWidth;\n this.#parentHeight = parentHeight;\n this.#parentScale = parentScale;\n this.#rotation = rotation;\n this.#thickness = thickness;\n this.#innerMargin = innerMargin ?? 0;\n this.#lines = lines;\n this.#computeBbox();\n }\n setLastElement(element) {\n this.#lines.push(element);\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n removeLastElement() {\n this.#lines.pop();\n return {\n path: {\n d: this.toSVGPath()\n }\n };\n }\n toSVGPath() {\n const buffer = [];\n for (const {\n line\n } of this.#lines) {\n buffer.push(`M${Outline.svgRound(line[4])} ${Outline.svgRound(line[5])}`);\n if (line.length === 6) {\n buffer.push(\"Z\");\n continue;\n }\n if (line.length === 12) {\n buffer.push(`L${Outline.svgRound(line[10])} ${Outline.svgRound(line[11])}`);\n continue;\n }\n for (let i = 6, ii = line.length; i < ii; i += 6) {\n const [c1x, c1y, c2x, c2y, x, y] = line.subarray(i, i + 6).map(Outline.svgRound);\n buffer.push(`C${c1x} ${c1y} ${c2x} ${c2y} ${x} ${y}`);\n }\n }\n return buffer.join(\"\");\n }\n serialize([pageX, pageY, pageWidth, pageHeight], isForCopying) {\n const serializedLines = [];\n const serializedPoints = [];\n const [x, y, width, height] = this.#getBBoxWithNoMargin();\n let tx, ty, sx, sy, x1, y1, x2, y2, rescaleFn;\n switch (this.#rotation) {\n case 0:\n rescaleFn = Outline._rescale;\n tx = pageX;\n ty = pageY + pageHeight;\n sx = pageWidth;\n sy = -pageHeight;\n x1 = pageX + x * pageWidth;\n y1 = pageY + (1 - y - height) * pageHeight;\n x2 = pageX + (x + width) * pageWidth;\n y2 = pageY + (1 - y) * pageHeight;\n break;\n case 90:\n rescaleFn = Outline._rescaleAndSwap;\n tx = pageX;\n ty = pageY;\n sx = pageWidth;\n sy = pageHeight;\n x1 = pageX + y * pageWidth;\n y1 = pageY + x * pageHeight;\n x2 = pageX + (y + height) * pageWidth;\n y2 = pageY + (x + width) * pageHeight;\n break;\n case 180:\n rescaleFn = Outline._rescale;\n tx = pageX + pageWidth;\n ty = pageY;\n sx = -pageWidth;\n sy = pageHeight;\n x1 = pageX + (1 - x - width) * pageWidth;\n y1 = pageY + y * pageHeight;\n x2 = pageX + (1 - x) * pageWidth;\n y2 = pageY + (y + height) * pageHeight;\n break;\n case 270:\n rescaleFn = Outline._rescaleAndSwap;\n tx = pageX + pageWidth;\n ty = pageY + pageHeight;\n sx = -pageWidth;\n sy = -pageHeight;\n x1 = pageX + (1 - y - height) * pageWidth;\n y1 = pageY + (1 - x - width) * pageHeight;\n x2 = pageX + (1 - y) * pageWidth;\n y2 = pageY + (1 - x) * pageHeight;\n break;\n }\n for (const {\n line,\n points\n } of this.#lines) {\n serializedLines.push(rescaleFn(line, tx, ty, sx, sy, isForCopying ? new Array(line.length) : null));\n serializedPoints.push(rescaleFn(points, tx, ty, sx, sy, isForCopying ? new Array(points.length) : null));\n }\n return {\n lines: serializedLines,\n points: serializedPoints,\n rect: [x1, y1, x2, y2]\n };\n }\n static deserialize(pageX, pageY, pageWidth, pageHeight, innerMargin, {\n paths: {\n lines,\n points\n },\n rotation,\n thickness\n }) {\n const newLines = [];\n let tx, ty, sx, sy, rescaleFn;\n switch (rotation) {\n case 0:\n rescaleFn = Outline._rescale;\n tx = -pageX / pageWidth;\n ty = pageY / pageHeight + 1;\n sx = 1 / pageWidth;\n sy = -1 / pageHeight;\n break;\n case 90:\n rescaleFn = Outline._rescaleAndSwap;\n tx = -pageY / pageHeight;\n ty = -pageX / pageWidth;\n sx = 1 / pageHeight;\n sy = 1 / pageWidth;\n break;\n case 180:\n rescaleFn = Outline._rescale;\n tx = pageX / pageWidth + 1;\n ty = -pageY / pageHeight;\n sx = -1 / pageWidth;\n sy = 1 / pageHeight;\n break;\n case 270:\n rescaleFn = Outline._rescaleAndSwap;\n tx = pageY / pageHeight + 1;\n ty = pageX / pageWidth + 1;\n sx = -1 / pageHeight;\n sy = -1 / pageWidth;\n break;\n }\n if (!lines) {\n lines = [];\n for (const point of points) {\n const len = point.length;\n if (len === 2) {\n lines.push(new Float32Array([NaN, NaN, NaN, NaN, point[0], point[1]]));\n continue;\n }\n if (len === 4) {\n lines.push(new Float32Array([NaN, NaN, NaN, NaN, point[0], point[1], NaN, NaN, NaN, NaN, point[2], point[3]]));\n continue;\n }\n const line = new Float32Array(3 * (len - 2));\n lines.push(line);\n let [x1, y1, x2, y2] = point.subarray(0, 4);\n line.set([NaN, NaN, NaN, NaN, x1, y1], 0);\n for (let i = 4; i < len; i += 2) {\n const x = point[i];\n const y = point[i + 1];\n line.set(Outline.createBezierPoints(x1, y1, x2, y2, x, y), (i - 2) * 3);\n [x1, y1, x2, y2] = [x2, y2, x, y];\n }\n }\n }\n for (let i = 0, ii = lines.length; i < ii; i++) {\n newLines.push({\n line: rescaleFn(lines[i].map(x => x ?? NaN), tx, ty, sx, sy),\n points: rescaleFn(points[i].map(x => x ?? NaN), tx, ty, sx, sy)\n });\n }\n const outlines = new InkDrawOutline();\n outlines.build(newLines, pageWidth, pageHeight, 1, rotation, thickness, innerMargin);\n return outlines;\n }\n #getMarginComponents(thickness = this.#thickness) {\n const margin = this.#innerMargin + thickness / 2 * this.#parentScale;\n return this.#rotation % 180 === 0 ? [margin / this.#parentWidth, margin / this.#parentHeight] : [margin / this.#parentHeight, margin / this.#parentWidth];\n }\n #getBBoxWithNoMargin() {\n const [x, y, width, height] = this.#bbox;\n const [marginX, marginY] = this.#getMarginComponents(0);\n return [x + marginX, y + marginY, width - 2 * marginX, height - 2 * marginY];\n }\n #computeBbox() {\n const bbox = this.#bbox = new Float32Array([Infinity, Infinity, -Infinity, -Infinity]);\n for (const {\n line\n } of this.#lines) {\n if (line.length <= 12) {\n for (let i = 4, ii = line.length; i < ii; i += 6) {\n const [x, y] = line.subarray(i, i + 2);\n bbox[0] = Math.min(bbox[0], x);\n bbox[1] = Math.min(bbox[1], y);\n bbox[2] = Math.max(bbox[2], x);\n bbox[3] = Math.max(bbox[3], y);\n }\n continue;\n }\n let lastX = line[4],\n lastY = line[5];\n for (let i = 6, ii = line.length; i < ii; i += 6) {\n const [c1x, c1y, c2x, c2y, x, y] = line.subarray(i, i + 6);\n Util.bezierBoundingBox(lastX, lastY, c1x, c1y, c2x, c2y, x, y, bbox);\n lastX = x;\n lastY = y;\n }\n }\n const [marginX, marginY] = this.#getMarginComponents();\n bbox[0] = Math.min(1, Math.max(0, bbox[0] - marginX));\n bbox[1] = Math.min(1, Math.max(0, bbox[1] - marginY));\n bbox[2] = Math.min(1, Math.max(0, bbox[2] + marginX));\n bbox[3] = Math.min(1, Math.max(0, bbox[3] + marginY));\n bbox[2] -= bbox[0];\n bbox[3] -= bbox[1];\n }\n get box() {\n return this.#bbox;\n }\n updateProperty(name, value) {\n if (name === \"stroke-width\") {\n return this.#updateThickness(value);\n }\n return null;\n }\n #updateThickness(thickness) {\n const [oldMarginX, oldMarginY] = this.#getMarginComponents();\n this.#thickness = thickness;\n const [newMarginX, newMarginY] = this.#getMarginComponents();\n const [diffMarginX, diffMarginY] = [newMarginX - oldMarginX, newMarginY - oldMarginY];\n const bbox = this.#bbox;\n bbox[0] -= diffMarginX;\n bbox[1] -= diffMarginY;\n bbox[2] += 2 * diffMarginX;\n bbox[3] += 2 * diffMarginY;\n return bbox;\n }\n updateParentDimensions([width, height], scale) {\n const [oldMarginX, oldMarginY] = this.#getMarginComponents();\n this.#parentWidth = width;\n this.#parentHeight = height;\n this.#parentScale = scale;\n const [newMarginX, newMarginY] = this.#getMarginComponents();\n const diffMarginX = newMarginX - oldMarginX;\n const diffMarginY = newMarginY - oldMarginY;\n const bbox = this.#bbox;\n bbox[0] -= diffMarginX;\n bbox[1] -= diffMarginY;\n bbox[2] += 2 * diffMarginX;\n bbox[3] += 2 * diffMarginY;\n return bbox;\n }\n updateRotation(rotation) {\n this.#currentRotation = rotation;\n return {\n path: {\n transform: this.rotationTransform\n }\n };\n }\n get viewBox() {\n return this.#bbox.map(Outline.svgRound).join(\" \");\n }\n get defaultProperties() {\n const [x, y] = this.#bbox;\n return {\n root: {\n viewBox: this.viewBox\n },\n path: {\n \"transform-origin\": `${Outline.svgRound(x)} ${Outline.svgRound(y)}`\n }\n };\n }\n get rotationTransform() {\n const [,, width, height] = this.#bbox;\n let a = 0,\n b = 0,\n c = 0,\n d = 0,\n e = 0,\n f = 0;\n switch (this.#currentRotation) {\n case 90:\n b = height / width;\n c = -width / height;\n e = width;\n break;\n case 180:\n a = -1;\n d = -1;\n e = width;\n f = height;\n break;\n case 270:\n b = -height / width;\n c = width / height;\n f = height;\n break;\n default:\n return \"\";\n }\n return `matrix(${a} ${b} ${c} ${d} ${Outline.svgRound(e)} ${Outline.svgRound(f)})`;\n }\n getPathResizingSVGProperties([newX, newY, newWidth, newHeight]) {\n const [marginX, marginY] = this.#getMarginComponents();\n const [x, y, width, height] = this.#bbox;\n if (Math.abs(width - marginX) <= Outline.PRECISION || Math.abs(height - marginY) <= Outline.PRECISION) {\n const tx = newX + newWidth / 2 - (x + width / 2);\n const ty = newY + newHeight / 2 - (y + height / 2);\n return {\n path: {\n \"transform-origin\": `${Outline.svgRound(newX)} ${Outline.svgRound(newY)}`,\n transform: `${this.rotationTransform} translate(${tx} ${ty})`\n }\n };\n }\n const s1x = (newWidth - 2 * marginX) / (width - 2 * marginX);\n const s1y = (newHeight - 2 * marginY) / (height - 2 * marginY);\n const s2x = width / newWidth;\n const s2y = height / newHeight;\n return {\n path: {\n \"transform-origin\": `${Outline.svgRound(x)} ${Outline.svgRound(y)}`,\n transform: `${this.rotationTransform} scale(${s2x} ${s2y}) ` + `translate(${Outline.svgRound(marginX)} ${Outline.svgRound(marginY)}) scale(${s1x} ${s1y}) ` + `translate(${Outline.svgRound(-marginX)} ${Outline.svgRound(-marginY)})`\n }\n };\n }\n getPathResizedSVGProperties([newX, newY, newWidth, newHeight]) {\n const [marginX, marginY] = this.#getMarginComponents();\n const bbox = this.#bbox;\n const [x, y, width, height] = bbox;\n bbox[0] = newX;\n bbox[1] = newY;\n bbox[2] = newWidth;\n bbox[3] = newHeight;\n if (Math.abs(width - marginX) <= Outline.PRECISION || Math.abs(height - marginY) <= Outline.PRECISION) {\n const tx = newX + newWidth / 2 - (x + width / 2);\n const ty = newY + newHeight / 2 - (y + height / 2);\n for (const {\n line,\n points\n } of this.#lines) {\n Outline._translate(line, tx, ty, line);\n Outline._translate(points, tx, ty, points);\n }\n return {\n root: {\n viewBox: this.viewBox\n },\n path: {\n \"transform-origin\": `${Outline.svgRound(newX)} ${Outline.svgRound(newY)}`,\n transform: this.rotationTransform || null,\n d: this.toSVGPath()\n }\n };\n }\n const s1x = (newWidth - 2 * marginX) / (width - 2 * marginX);\n const s1y = (newHeight - 2 * marginY) / (height - 2 * marginY);\n const tx = -s1x * (x + marginX) + newX + marginX;\n const ty = -s1y * (y + marginY) + newY + marginY;\n if (s1x !== 1 || s1y !== 1 || tx !== 0 || ty !== 0) {\n for (const {\n line,\n points\n } of this.#lines) {\n Outline._rescale(line, tx, ty, s1x, s1y, line);\n Outline._rescale(points, tx, ty, s1x, s1y, points);\n }\n }\n return {\n root: {\n viewBox: this.viewBox\n },\n path: {\n \"transform-origin\": `${Outline.svgRound(newX)} ${Outline.svgRound(newY)}`,\n transform: this.rotationTransform || null,\n d: this.toSVGPath()\n }\n };\n }\n getPathTranslatedSVGProperties([newX, newY], parentDimensions) {\n const [newParentWidth, newParentHeight] = parentDimensions;\n const bbox = this.#bbox;\n const tx = newX - bbox[0];\n const ty = newY - bbox[1];\n if (this.#parentWidth === newParentWidth && this.#parentHeight === newParentHeight) {\n for (const {\n line,\n points\n } of this.#lines) {\n Outline._translate(line, tx, ty, line);\n Outline._translate(points, tx, ty, points);\n }\n } else {\n const sx = this.#parentWidth / newParentWidth;\n const sy = this.#parentHeight / newParentHeight;\n this.#parentWidth = newParentWidth;\n this.#parentHeight = newParentHeight;\n for (const {\n line,\n points\n } of this.#lines) {\n Outline._rescale(line, tx, ty, sx, sy, line);\n Outline._rescale(points, tx, ty, sx, sy, points);\n }\n bbox[2] *= sx;\n bbox[3] *= sy;\n }\n bbox[0] = newX;\n bbox[1] = newY;\n return {\n root: {\n viewBox: this.viewBox\n },\n path: {\n d: this.toSVGPath(),\n \"transform-origin\": `${Outline.svgRound(newX)} ${Outline.svgRound(newY)}`\n }\n };\n }\n get defaultSVGProperties() {\n const bbox = this.#bbox;\n return {\n root: {\n viewBox: this.viewBox\n },\n rootClass: {\n draw: true\n },\n path: {\n d: this.toSVGPath(),\n \"transform-origin\": `${Outline.svgRound(bbox[0])} ${Outline.svgRound(bbox[1])}`,\n transform: this.rotationTransform || null\n },\n bbox\n };\n }\n}\n\n;// ./src/display/editor/ink.js\n\n\n\n\n\nclass InkDrawingOptions extends DrawingOptions {\n #viewParameters;\n constructor(viewerParameters) {\n super();\n this.#viewParameters = viewerParameters;\n super.updateProperties({\n fill: \"none\",\n stroke: AnnotationEditor._defaultLineColor,\n \"stroke-opacity\": 1,\n \"stroke-width\": 1,\n \"stroke-linecap\": \"round\",\n \"stroke-linejoin\": \"round\",\n \"stroke-miterlimit\": 10\n });\n }\n updateSVGProperty(name, value) {\n if (name === \"stroke-width\") {\n value ??= this[\"stroke-width\"];\n value *= this.#viewParameters.realScale;\n }\n super.updateSVGProperty(name, value);\n }\n clone() {\n const clone = new InkDrawingOptions(this.#viewParameters);\n clone.updateAll(this);\n return clone;\n }\n}\nclass InkEditor extends DrawingEditor {\n static _type = \"ink\";\n static _editorType = AnnotationEditorType.INK;\n static _defaultDrawingOptions = null;\n constructor(params) {\n super({\n ...params,\n name: \"inkEditor\"\n });\n this._willKeepAspectRatio = true;\n }\n static initialize(l10n, uiManager) {\n AnnotationEditor.initialize(l10n, uiManager);\n this._defaultDrawingOptions = new InkDrawingOptions(uiManager.viewParameters);\n }\n static getDefaultDrawingOptions(options) {\n const clone = this._defaultDrawingOptions.clone();\n clone.updateProperties(options);\n return clone;\n }\n static get supportMultipleDrawings() {\n return true;\n }\n static get typesMap() {\n return shadow(this, \"typesMap\", new Map([[AnnotationEditorParamsType.INK_THICKNESS, \"stroke-width\"], [AnnotationEditorParamsType.INK_COLOR, \"stroke\"], [AnnotationEditorParamsType.INK_OPACITY, \"stroke-opacity\"]]));\n }\n static createDrawerInstance(x, y, parentWidth, parentHeight, rotation) {\n return new InkDrawOutliner(x, y, parentWidth, parentHeight, rotation, this._defaultDrawingOptions[\"stroke-width\"]);\n }\n static deserializeDraw(pageX, pageY, pageWidth, pageHeight, innerMargin, data) {\n return InkDrawOutline.deserialize(pageX, pageY, pageWidth, pageHeight, innerMargin, data);\n }\n static async deserialize(data, parent, uiManager) {\n let initialData = null;\n if (data instanceof InkAnnotationElement) {\n const {\n data: {\n inkLists,\n rect,\n rotation,\n id,\n color,\n opacity,\n borderStyle: {\n rawWidth: thickness\n },\n popupRef\n },\n parent: {\n page: {\n pageNumber\n }\n }\n } = data;\n initialData = data = {\n annotationType: AnnotationEditorType.INK,\n color: Array.from(color),\n thickness,\n opacity,\n paths: {\n points: inkLists\n },\n boxes: null,\n pageIndex: pageNumber - 1,\n rect: rect.slice(0),\n rotation,\n id,\n deleted: false,\n popupRef\n };\n }\n const editor = await super.deserialize(data, parent, uiManager);\n editor.annotationElementId = data.id || null;\n editor._initialData = initialData;\n return editor;\n }\n onScaleChanging() {\n if (!this.parent) {\n return;\n }\n super.onScaleChanging();\n const {\n _drawId,\n _drawingOptions,\n parent\n } = this;\n _drawingOptions.updateSVGProperty(\"stroke-width\");\n parent.drawLayer.updateProperties(_drawId, _drawingOptions.toSVGProperties());\n }\n static onScaleChangingWhenDrawing() {\n const parent = this._currentParent;\n if (!parent) {\n return;\n }\n super.onScaleChangingWhenDrawing();\n this._defaultDrawingOptions.updateSVGProperty(\"stroke-width\");\n parent.drawLayer.updateProperties(this._currentDrawId, this._defaultDrawingOptions.toSVGProperties());\n }\n createDrawingOptions({\n color,\n thickness,\n opacity\n }) {\n this._drawingOptions = InkEditor.getDefaultDrawingOptions({\n stroke: Util.makeHexColor(...color),\n \"stroke-width\": thickness,\n \"stroke-opacity\": opacity\n });\n }\n serialize(isForCopying = false) {\n if (this.isEmpty()) {\n return null;\n }\n if (this.deleted) {\n return this.serializeDeleted();\n }\n const {\n lines,\n points,\n rect\n } = this.serializeDraw(isForCopying);\n const {\n _drawingOptions: {\n stroke,\n \"stroke-opacity\": opacity,\n \"stroke-width\": thickness\n }\n } = this;\n const serialized = {\n annotationType: AnnotationEditorType.INK,\n color: AnnotationEditor._colorManager.convert(stroke),\n opacity,\n thickness,\n paths: {\n lines,\n points\n },\n pageIndex: this.pageIndex,\n rect,\n rotation: this.rotation,\n structTreeParentId: this._structTreeParentId\n };\n if (isForCopying) {\n return serialized;\n }\n if (this.annotationElementId && !this.#hasElementChanged(serialized)) {\n return null;\n }\n serialized.id = this.annotationElementId;\n return serialized;\n }\n #hasElementChanged(serialized) {\n const {\n color,\n thickness,\n opacity,\n pageIndex\n } = this._initialData;\n return this._hasBeenMoved || this._hasBeenResized || serialized.color.some((c, i) => c !== color[i]) || serialized.thickness !== thickness || serialized.opacity !== opacity || serialized.pageIndex !== pageIndex;\n }\n renderAnnotationElement(annotation) {\n const {\n points,\n rect\n } = this.serializeDraw(false);\n annotation.updateEdited({\n rect,\n thickness: this._drawingOptions[\"stroke-width\"],\n points\n });\n return null;\n }\n}\n\n;// ./src/display/editor/stamp.js\n\n\n\n\nclass StampEditor extends AnnotationEditor {\n #bitmap = null;\n #bitmapId = null;\n #bitmapPromise = null;\n #bitmapUrl = null;\n #bitmapFile = null;\n #bitmapFileName = \"\";\n #canvas = null;\n #resizeTimeoutId = null;\n #isSvg = false;\n #hasBeenAddedInUndoStack = false;\n static _type = \"stamp\";\n static _editorType = AnnotationEditorType.STAMP;\n constructor(params) {\n super({\n ...params,\n name: \"stampEditor\"\n });\n this.#bitmapUrl = params.bitmapUrl;\n this.#bitmapFile = params.bitmapFile;\n }\n static initialize(l10n, uiManager) {\n AnnotationEditor.initialize(l10n, uiManager);\n }\n static get supportedTypes() {\n const types = [\"apng\", \"avif\", \"bmp\", \"gif\", \"jpeg\", \"png\", \"svg+xml\", \"webp\", \"x-icon\"];\n return shadow(this, \"supportedTypes\", types.map(type => `image/${type}`));\n }\n static get supportedTypesStr() {\n return shadow(this, \"supportedTypesStr\", this.supportedTypes.join(\",\"));\n }\n static isHandlingMimeForPasting(mime) {\n return this.supportedTypes.includes(mime);\n }\n static paste(item, parent) {\n parent.pasteEditor(AnnotationEditorType.STAMP, {\n bitmapFile: item.getAsFile()\n });\n }\n altTextFinish() {\n if (this._uiManager.useNewAltTextFlow) {\n this.div.hidden = false;\n }\n super.altTextFinish();\n }\n get telemetryFinalData() {\n return {\n type: \"stamp\",\n hasAltText: !!this.altTextData?.altText\n };\n }\n static computeTelemetryFinalData(data) {\n const hasAltTextStats = data.get(\"hasAltText\");\n return {\n hasAltText: hasAltTextStats.get(true) ?? 0,\n hasNoAltText: hasAltTextStats.get(false) ?? 0\n };\n }\n #getBitmapFetched(data, fromId = false) {\n if (!data) {\n this.remove();\n return;\n }\n this.#bitmap = data.bitmap;\n if (!fromId) {\n this.#bitmapId = data.id;\n this.#isSvg = data.isSvg;\n }\n if (data.file) {\n this.#bitmapFileName = data.file.name;\n }\n this.#createCanvas();\n }\n #getBitmapDone() {\n this.#bitmapPromise = null;\n this._uiManager.enableWaiting(false);\n if (!this.#canvas) {\n return;\n }\n if (this._uiManager.useNewAltTextWhenAddingImage && this._uiManager.useNewAltTextFlow && this.#bitmap) {\n this._editToolbar.hide();\n this._uiManager.editAltText(this, true);\n return;\n }\n if (!this._uiManager.useNewAltTextWhenAddingImage && this._uiManager.useNewAltTextFlow && this.#bitmap) {\n this._reportTelemetry({\n action: \"pdfjs.image.image_added\",\n data: {\n alt_text_modal: false,\n alt_text_type: \"empty\"\n }\n });\n try {\n this.mlGuessAltText();\n } catch {}\n }\n this.div.focus();\n }\n async mlGuessAltText(imageData = null, updateAltTextData = true) {\n if (this.hasAltTextData()) {\n return null;\n }\n const {\n mlManager\n } = this._uiManager;\n if (!mlManager) {\n throw new Error(\"No ML.\");\n }\n if (!(await mlManager.isEnabledFor(\"altText\"))) {\n throw new Error(\"ML isn't enabled for alt text.\");\n }\n const {\n data,\n width,\n height\n } = imageData || this.copyCanvas(null, null, true).imageData;\n const response = await mlManager.guess({\n name: \"altText\",\n request: {\n data,\n width,\n height,\n channels: data.length / (width * height)\n }\n });\n if (!response) {\n throw new Error(\"No response from the AI service.\");\n }\n if (response.error) {\n throw new Error(\"Error from the AI service.\");\n }\n if (response.cancel) {\n return null;\n }\n if (!response.output) {\n throw new Error(\"No valid response from the AI service.\");\n }\n const altText = response.output;\n await this.setGuessedAltText(altText);\n if (updateAltTextData && !this.hasAltTextData()) {\n this.altTextData = {\n alt: altText,\n decorative: false\n };\n }\n return altText;\n }\n #getBitmap() {\n if (this.#bitmapId) {\n this._uiManager.enableWaiting(true);\n this._uiManager.imageManager.getFromId(this.#bitmapId).then(data => this.#getBitmapFetched(data, true)).finally(() => this.#getBitmapDone());\n return;\n }\n if (this.#bitmapUrl) {\n const url = this.#bitmapUrl;\n this.#bitmapUrl = null;\n this._uiManager.enableWaiting(true);\n this.#bitmapPromise = this._uiManager.imageManager.getFromUrl(url).then(data => this.#getBitmapFetched(data)).finally(() => this.#getBitmapDone());\n return;\n }\n if (this.#bitmapFile) {\n const file = this.#bitmapFile;\n this.#bitmapFile = null;\n this._uiManager.enableWaiting(true);\n this.#bitmapPromise = this._uiManager.imageManager.getFromFile(file).then(data => this.#getBitmapFetched(data)).finally(() => this.#getBitmapDone());\n return;\n }\n const input = document.createElement(\"input\");\n input.type = \"file\";\n input.accept = StampEditor.supportedTypesStr;\n const signal = this._uiManager._signal;\n this.#bitmapPromise = new Promise(resolve => {\n input.addEventListener(\"change\", async () => {\n if (!input.files || input.files.length === 0) {\n this.remove();\n } else {\n this._uiManager.enableWaiting(true);\n const data = await this._uiManager.imageManager.getFromFile(input.files[0]);\n this._reportTelemetry({\n action: \"pdfjs.image.image_selected\",\n data: {\n alt_text_modal: this._uiManager.useNewAltTextFlow\n }\n });\n this.#getBitmapFetched(data);\n }\n resolve();\n }, {\n signal\n });\n input.addEventListener(\"cancel\", () => {\n this.remove();\n resolve();\n }, {\n signal\n });\n }).finally(() => this.#getBitmapDone());\n input.click();\n }\n remove() {\n if (this.#bitmapId) {\n this.#bitmap = null;\n this._uiManager.imageManager.deleteId(this.#bitmapId);\n this.#canvas?.remove();\n this.#canvas = null;\n if (this.#resizeTimeoutId) {\n clearTimeout(this.#resizeTimeoutId);\n this.#resizeTimeoutId = null;\n }\n }\n super.remove();\n }\n rebuild() {\n if (!this.parent) {\n if (this.#bitmapId) {\n this.#getBitmap();\n }\n return;\n }\n super.rebuild();\n if (this.div === null) {\n return;\n }\n if (this.#bitmapId && this.#canvas === null) {\n this.#getBitmap();\n }\n if (!this.isAttachedToDOM) {\n this.parent.add(this);\n }\n }\n onceAdded(focus) {\n this._isDraggable = true;\n if (focus) {\n this.div.focus();\n }\n }\n isEmpty() {\n return !(this.#bitmapPromise || this.#bitmap || this.#bitmapUrl || this.#bitmapFile || this.#bitmapId);\n }\n get isResizable() {\n return true;\n }\n render() {\n if (this.div) {\n return this.div;\n }\n let baseX, baseY;\n if (this.width) {\n baseX = this.x;\n baseY = this.y;\n }\n super.render();\n this.div.hidden = true;\n this.div.setAttribute(\"role\", \"figure\");\n this.addAltTextButton();\n if (this.#bitmap) {\n this.#createCanvas();\n } else {\n this.#getBitmap();\n }\n if (this.width && !this.annotationElementId) {\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setAt(baseX * parentWidth, baseY * parentHeight, this.width * parentWidth, this.height * parentHeight);\n }\n this._uiManager.addShouldRescale(this);\n return this.div;\n }\n _onResized() {\n this.onScaleChanging();\n }\n onScaleChanging() {\n if (!this.parent) {\n return;\n }\n if (this.#resizeTimeoutId !== null) {\n clearTimeout(this.#resizeTimeoutId);\n }\n const TIME_TO_WAIT = 200;\n this.#resizeTimeoutId = setTimeout(() => {\n this.#resizeTimeoutId = null;\n this.#drawBitmap();\n }, TIME_TO_WAIT);\n }\n #createCanvas() {\n const {\n div\n } = this;\n let {\n width,\n height\n } = this.#bitmap;\n const [pageWidth, pageHeight] = this.pageDimensions;\n const MAX_RATIO = 0.75;\n if (this.width) {\n width = this.width * pageWidth;\n height = this.height * pageHeight;\n } else if (width > MAX_RATIO * pageWidth || height > MAX_RATIO * pageHeight) {\n const factor = Math.min(MAX_RATIO * pageWidth / width, MAX_RATIO * pageHeight / height);\n width *= factor;\n height *= factor;\n }\n const [parentWidth, parentHeight] = this.parentDimensions;\n this.setDims(width * parentWidth / pageWidth, height * parentHeight / pageHeight);\n this._uiManager.enableWaiting(false);\n const canvas = this.#canvas = document.createElement(\"canvas\");\n canvas.setAttribute(\"role\", \"img\");\n this.addContainer(canvas);\n this.width = width / pageWidth;\n this.height = height / pageHeight;\n if (this._initialOptions?.isCentered) {\n this.center();\n } else {\n this.fixAndSetPosition();\n }\n this._initialOptions = null;\n if (!this._uiManager.useNewAltTextWhenAddingImage || !this._uiManager.useNewAltTextFlow || this.annotationElementId) {\n div.hidden = false;\n }\n this.#drawBitmap();\n if (!this.#hasBeenAddedInUndoStack) {\n this.parent.addUndoableEditor(this);\n this.#hasBeenAddedInUndoStack = true;\n }\n this._reportTelemetry({\n action: \"inserted_image\"\n });\n if (this.#bitmapFileName) {\n canvas.setAttribute(\"aria-label\", this.#bitmapFileName);\n }\n }\n copyCanvas(maxDataDimension, maxPreviewDimension, createImageData = false) {\n if (!maxDataDimension) {\n maxDataDimension = 224;\n }\n const {\n width: bitmapWidth,\n height: bitmapHeight\n } = this.#bitmap;\n const outputScale = new OutputScale();\n let bitmap = this.#bitmap;\n let width = bitmapWidth,\n height = bitmapHeight;\n let canvas = null;\n if (maxPreviewDimension) {\n if (bitmapWidth > maxPreviewDimension || bitmapHeight > maxPreviewDimension) {\n const ratio = Math.min(maxPreviewDimension / bitmapWidth, maxPreviewDimension / bitmapHeight);\n width = Math.floor(bitmapWidth * ratio);\n height = Math.floor(bitmapHeight * ratio);\n }\n canvas = document.createElement(\"canvas\");\n const scaledWidth = canvas.width = Math.ceil(width * outputScale.sx);\n const scaledHeight = canvas.height = Math.ceil(height * outputScale.sy);\n if (!this.#isSvg) {\n bitmap = this.#scaleBitmap(scaledWidth, scaledHeight);\n }\n const ctx = canvas.getContext(\"2d\");\n ctx.filter = this._uiManager.hcmFilter;\n let white = \"white\",\n black = \"#cfcfd8\";\n if (this._uiManager.hcmFilter !== \"none\") {\n black = \"black\";\n } else if (window.matchMedia?.(\"(prefers-color-scheme: dark)\").matches) {\n white = \"#8f8f9d\";\n black = \"#42414d\";\n }\n const boxDim = 15;\n const boxDimWidth = boxDim * outputScale.sx;\n const boxDimHeight = boxDim * outputScale.sy;\n const pattern = new OffscreenCanvas(boxDimWidth * 2, boxDimHeight * 2);\n const patternCtx = pattern.getContext(\"2d\");\n patternCtx.fillStyle = white;\n patternCtx.fillRect(0, 0, boxDimWidth * 2, boxDimHeight * 2);\n patternCtx.fillStyle = black;\n patternCtx.fillRect(0, 0, boxDimWidth, boxDimHeight);\n patternCtx.fillRect(boxDimWidth, boxDimHeight, boxDimWidth, boxDimHeight);\n ctx.fillStyle = ctx.createPattern(pattern, \"repeat\");\n ctx.fillRect(0, 0, scaledWidth, scaledHeight);\n ctx.drawImage(bitmap, 0, 0, bitmap.width, bitmap.height, 0, 0, scaledWidth, scaledHeight);\n }\n let imageData = null;\n if (createImageData) {\n let dataWidth, dataHeight;\n if (outputScale.symmetric && bitmap.width < maxDataDimension && bitmap.height < maxDataDimension) {\n dataWidth = bitmap.width;\n dataHeight = bitmap.height;\n } else {\n bitmap = this.#bitmap;\n if (bitmapWidth > maxDataDimension || bitmapHeight > maxDataDimension) {\n const ratio = Math.min(maxDataDimension / bitmapWidth, maxDataDimension / bitmapHeight);\n dataWidth = Math.floor(bitmapWidth * ratio);\n dataHeight = Math.floor(bitmapHeight * ratio);\n if (!this.#isSvg) {\n bitmap = this.#scaleBitmap(dataWidth, dataHeight);\n }\n }\n }\n const offscreen = new OffscreenCanvas(dataWidth, dataHeight);\n const offscreenCtx = offscreen.getContext(\"2d\", {\n willReadFrequently: true\n });\n offscreenCtx.drawImage(bitmap, 0, 0, bitmap.width, bitmap.height, 0, 0, dataWidth, dataHeight);\n imageData = {\n width: dataWidth,\n height: dataHeight,\n data: offscreenCtx.getImageData(0, 0, dataWidth, dataHeight).data\n };\n }\n return {\n canvas,\n width,\n height,\n imageData\n };\n }\n #scaleBitmap(width, height) {\n const {\n width: bitmapWidth,\n height: bitmapHeight\n } = this.#bitmap;\n let newWidth = bitmapWidth;\n let newHeight = bitmapHeight;\n let bitmap = this.#bitmap;\n while (newWidth > 2 * width || newHeight > 2 * height) {\n const prevWidth = newWidth;\n const prevHeight = newHeight;\n if (newWidth > 2 * width) {\n newWidth = newWidth >= 16384 ? Math.floor(newWidth / 2) - 1 : Math.ceil(newWidth / 2);\n }\n if (newHeight > 2 * height) {\n newHeight = newHeight >= 16384 ? Math.floor(newHeight / 2) - 1 : Math.ceil(newHeight / 2);\n }\n const offscreen = new OffscreenCanvas(newWidth, newHeight);\n const ctx = offscreen.getContext(\"2d\");\n ctx.drawImage(bitmap, 0, 0, prevWidth, prevHeight, 0, 0, newWidth, newHeight);\n bitmap = offscreen.transferToImageBitmap();\n }\n return bitmap;\n }\n #drawBitmap() {\n const [parentWidth, parentHeight] = this.parentDimensions;\n const {\n width,\n height\n } = this;\n const outputScale = new OutputScale();\n const scaledWidth = Math.ceil(width * parentWidth * outputScale.sx);\n const scaledHeight = Math.ceil(height * parentHeight * outputScale.sy);\n const canvas = this.#canvas;\n if (!canvas || canvas.width === scaledWidth && canvas.height === scaledHeight) {\n return;\n }\n canvas.width = scaledWidth;\n canvas.height = scaledHeight;\n const bitmap = this.#isSvg ? this.#bitmap : this.#scaleBitmap(scaledWidth, scaledHeight);\n const ctx = canvas.getContext(\"2d\");\n ctx.filter = this._uiManager.hcmFilter;\n ctx.drawImage(bitmap, 0, 0, bitmap.width, bitmap.height, 0, 0, scaledWidth, scaledHeight);\n }\n getImageForAltText() {\n return this.#canvas;\n }\n #serializeBitmap(toUrl) {\n if (toUrl) {\n if (this.#isSvg) {\n const url = this._uiManager.imageManager.getSvgUrl(this.#bitmapId);\n if (url) {\n return url;\n }\n }\n const canvas = document.createElement(\"canvas\");\n ({\n width: canvas.width,\n height: canvas.height\n } = this.#bitmap);\n const ctx = canvas.getContext(\"2d\");\n ctx.drawImage(this.#bitmap, 0, 0);\n return canvas.toDataURL();\n }\n if (this.#isSvg) {\n const [pageWidth, pageHeight] = this.pageDimensions;\n const width = Math.round(this.width * pageWidth * PixelsPerInch.PDF_TO_CSS_UNITS);\n const height = Math.round(this.height * pageHeight * PixelsPerInch.PDF_TO_CSS_UNITS);\n const offscreen = new OffscreenCanvas(width, height);\n const ctx = offscreen.getContext(\"2d\");\n ctx.drawImage(this.#bitmap, 0, 0, this.#bitmap.width, this.#bitmap.height, 0, 0, width, height);\n return offscreen.transferToImageBitmap();\n }\n return structuredClone(this.#bitmap);\n }\n static async deserialize(data, parent, uiManager) {\n let initialData = null;\n if (data instanceof StampAnnotationElement) {\n const {\n data: {\n rect,\n rotation,\n id,\n structParent,\n popupRef\n },\n container,\n parent: {\n page: {\n pageNumber\n }\n }\n } = data;\n const canvas = container.querySelector(\"canvas\");\n const imageData = uiManager.imageManager.getFromCanvas(container.id, canvas);\n canvas.remove();\n const altText = (await parent._structTree.getAriaAttributes(`${AnnotationPrefix}${id}`))?.get(\"aria-label\") || \"\";\n initialData = data = {\n annotationType: AnnotationEditorType.STAMP,\n bitmapId: imageData.id,\n bitmap: imageData.bitmap,\n pageIndex: pageNumber - 1,\n rect: rect.slice(0),\n rotation,\n id,\n deleted: false,\n accessibilityData: {\n decorative: false,\n altText\n },\n isSvg: false,\n structParent,\n popupRef\n };\n }\n const editor = await super.deserialize(data, parent, uiManager);\n const {\n rect,\n bitmap,\n bitmapUrl,\n bitmapId,\n isSvg,\n accessibilityData\n } = data;\n if (bitmapId && uiManager.imageManager.isValidId(bitmapId)) {\n editor.#bitmapId = bitmapId;\n if (bitmap) {\n editor.#bitmap = bitmap;\n }\n } else {\n editor.#bitmapUrl = bitmapUrl;\n }\n editor.#isSvg = isSvg;\n const [parentWidth, parentHeight] = editor.pageDimensions;\n editor.width = (rect[2] - rect[0]) / parentWidth;\n editor.height = (rect[3] - rect[1]) / parentHeight;\n editor.annotationElementId = data.id || null;\n if (accessibilityData) {\n editor.altTextData = accessibilityData;\n }\n editor._initialData = initialData;\n editor.#hasBeenAddedInUndoStack = !!initialData;\n return editor;\n }\n serialize(isForCopying = false, context = null) {\n if (this.isEmpty()) {\n return null;\n }\n if (this.deleted) {\n return this.serializeDeleted();\n }\n const serialized = {\n annotationType: AnnotationEditorType.STAMP,\n bitmapId: this.#bitmapId,\n pageIndex: this.pageIndex,\n rect: this.getRect(0, 0),\n rotation: this.rotation,\n isSvg: this.#isSvg,\n structTreeParentId: this._structTreeParentId\n };\n if (isForCopying) {\n serialized.bitmapUrl = this.#serializeBitmap(true);\n serialized.accessibilityData = this.serializeAltText(true);\n return serialized;\n }\n const {\n decorative,\n altText\n } = this.serializeAltText(false);\n if (!decorative && altText) {\n serialized.accessibilityData = {\n type: \"Figure\",\n alt: altText\n };\n }\n if (this.annotationElementId) {\n const changes = this.#hasElementChanged(serialized);\n if (changes.isSame) {\n return null;\n }\n if (changes.isSameAltText) {\n delete serialized.accessibilityData;\n } else {\n serialized.accessibilityData.structParent = this._initialData.structParent ?? -1;\n }\n }\n serialized.id = this.annotationElementId;\n if (context === null) {\n return serialized;\n }\n context.stamps ||= new Map();\n const area = this.#isSvg ? (serialized.rect[2] - serialized.rect[0]) * (serialized.rect[3] - serialized.rect[1]) : null;\n if (!context.stamps.has(this.#bitmapId)) {\n context.stamps.set(this.#bitmapId, {\n area,\n serialized\n });\n serialized.bitmap = this.#serializeBitmap(false);\n } else if (this.#isSvg) {\n const prevData = context.stamps.get(this.#bitmapId);\n if (area > prevData.area) {\n prevData.area = area;\n prevData.serialized.bitmap.close();\n prevData.serialized.bitmap = this.#serializeBitmap(false);\n }\n }\n return serialized;\n }\n #hasElementChanged(serialized) {\n const {\n pageIndex,\n accessibilityData: {\n altText\n }\n } = this._initialData;\n const isSamePageIndex = serialized.pageIndex === pageIndex;\n const isSameAltText = (serialized.accessibilityData?.alt || \"\") === altText;\n return {\n isSame: !this._hasBeenMoved && !this._hasBeenResized && isSamePageIndex && isSameAltText,\n isSameAltText\n };\n }\n renderAnnotationElement(annotation) {\n annotation.updateEdited({\n rect: this.getRect(0, 0)\n });\n return null;\n }\n}\n\n;// ./src/display/editor/annotation_editor_layer.js\n\n\n\n\n\n\n\nclass AnnotationEditorLayer {\n #accessibilityManager;\n #allowClick = false;\n #annotationLayer = null;\n #clickAC = null;\n #editorFocusTimeoutId = null;\n #editors = new Map();\n #hadPointerDown = false;\n #isDisabling = false;\n #isEnabling = false;\n #drawingAC = null;\n #focusedElement = null;\n #textLayer = null;\n #textSelectionAC = null;\n #uiManager;\n static _initialized = false;\n static #editorTypes = new Map([FreeTextEditor, InkEditor, StampEditor, HighlightEditor].map(type => [type._editorType, type]));\n constructor({\n uiManager,\n pageIndex,\n div,\n structTreeLayer,\n accessibilityManager,\n annotationLayer,\n drawLayer,\n textLayer,\n viewport,\n l10n\n }) {\n const editorTypes = [...AnnotationEditorLayer.#editorTypes.values()];\n if (!AnnotationEditorLayer._initialized) {\n AnnotationEditorLayer._initialized = true;\n for (const editorType of editorTypes) {\n editorType.initialize(l10n, uiManager);\n }\n }\n uiManager.registerEditorTypes(editorTypes);\n this.#uiManager = uiManager;\n this.pageIndex = pageIndex;\n this.div = div;\n this.#accessibilityManager = accessibilityManager;\n this.#annotationLayer = annotationLayer;\n this.viewport = viewport;\n this.#textLayer = textLayer;\n this.drawLayer = drawLayer;\n this._structTree = structTreeLayer;\n this.#uiManager.addLayer(this);\n }\n get isEmpty() {\n return this.#editors.size === 0;\n }\n get isInvisible() {\n return this.isEmpty && this.#uiManager.getMode() === AnnotationEditorType.NONE;\n }\n updateToolbar(mode) {\n this.#uiManager.updateToolbar(mode);\n }\n updateMode(mode = this.#uiManager.getMode()) {\n this.#cleanup();\n switch (mode) {\n case AnnotationEditorType.NONE:\n this.disableTextSelection();\n this.togglePointerEvents(false);\n this.toggleAnnotationLayerPointerEvents(true);\n this.disableClick();\n return;\n case AnnotationEditorType.INK:\n this.disableTextSelection();\n this.togglePointerEvents(true);\n this.enableClick();\n break;\n case AnnotationEditorType.HIGHLIGHT:\n this.enableTextSelection();\n this.togglePointerEvents(false);\n this.disableClick();\n break;\n default:\n this.disableTextSelection();\n this.togglePointerEvents(true);\n this.enableClick();\n }\n this.toggleAnnotationLayerPointerEvents(false);\n const {\n classList\n } = this.div;\n for (const editorType of AnnotationEditorLayer.#editorTypes.values()) {\n classList.toggle(`${editorType._type}Editing`, mode === editorType._editorType);\n }\n this.div.hidden = false;\n }\n hasTextLayer(textLayer) {\n return textLayer === this.#textLayer?.div;\n }\n setEditingState(isEditing) {\n this.#uiManager.setEditingState(isEditing);\n }\n addCommands(params) {\n this.#uiManager.addCommands(params);\n }\n cleanUndoStack(type) {\n this.#uiManager.cleanUndoStack(type);\n }\n toggleDrawing(enabled = false) {\n this.div.classList.toggle(\"drawing\", !enabled);\n }\n togglePointerEvents(enabled = false) {\n this.div.classList.toggle(\"disabled\", !enabled);\n }\n toggleAnnotationLayerPointerEvents(enabled = false) {\n this.#annotationLayer?.div.classList.toggle(\"disabled\", !enabled);\n }\n async enable() {\n this.#isEnabling = true;\n this.div.tabIndex = 0;\n this.togglePointerEvents(true);\n const annotationElementIds = new Set();\n for (const editor of this.#editors.values()) {\n editor.enableEditing();\n editor.show(true);\n if (editor.annotationElementId) {\n this.#uiManager.removeChangedExistingAnnotation(editor);\n annotationElementIds.add(editor.annotationElementId);\n }\n }\n if (!this.#annotationLayer) {\n this.#isEnabling = false;\n return;\n }\n const editables = this.#annotationLayer.getEditableAnnotations();\n for (const editable of editables) {\n editable.hide();\n if (this.#uiManager.isDeletedAnnotationElement(editable.data.id)) {\n continue;\n }\n if (annotationElementIds.has(editable.data.id)) {\n continue;\n }\n const editor = await this.deserialize(editable);\n if (!editor) {\n continue;\n }\n this.addOrRebuild(editor);\n editor.enableEditing();\n }\n this.#isEnabling = false;\n }\n disable() {\n this.#isDisabling = true;\n this.div.tabIndex = -1;\n this.togglePointerEvents(false);\n const changedAnnotations = new Map();\n const resetAnnotations = new Map();\n for (const editor of this.#editors.values()) {\n editor.disableEditing();\n if (!editor.annotationElementId) {\n continue;\n }\n if (editor.serialize() !== null) {\n changedAnnotations.set(editor.annotationElementId, editor);\n continue;\n } else {\n resetAnnotations.set(editor.annotationElementId, editor);\n }\n this.getEditableAnnotation(editor.annotationElementId)?.show();\n editor.remove();\n }\n if (this.#annotationLayer) {\n const editables = this.#annotationLayer.getEditableAnnotations();\n for (const editable of editables) {\n const {\n id\n } = editable.data;\n if (this.#uiManager.isDeletedAnnotationElement(id)) {\n continue;\n }\n let editor = resetAnnotations.get(id);\n if (editor) {\n editor.resetAnnotationElement(editable);\n editor.show(false);\n editable.show();\n continue;\n }\n editor = changedAnnotations.get(id);\n if (editor) {\n this.#uiManager.addChangedExistingAnnotation(editor);\n if (editor.renderAnnotationElement(editable)) {\n editor.show(false);\n }\n }\n editable.show();\n }\n }\n this.#cleanup();\n if (this.isEmpty) {\n this.div.hidden = true;\n }\n const {\n classList\n } = this.div;\n for (const editorType of AnnotationEditorLayer.#editorTypes.values()) {\n classList.remove(`${editorType._type}Editing`);\n }\n this.disableTextSelection();\n this.toggleAnnotationLayerPointerEvents(true);\n this.#isDisabling = false;\n }\n getEditableAnnotation(id) {\n return this.#annotationLayer?.getEditableAnnotation(id) || null;\n }\n setActiveEditor(editor) {\n const currentActive = this.#uiManager.getActive();\n if (currentActive === editor) {\n return;\n }\n this.#uiManager.setActiveEditor(editor);\n }\n enableTextSelection() {\n this.div.tabIndex = -1;\n if (this.#textLayer?.div && !this.#textSelectionAC) {\n this.#textSelectionAC = new AbortController();\n const signal = this.#uiManager.combinedSignal(this.#textSelectionAC);\n this.#textLayer.div.addEventListener(\"pointerdown\", this.#textLayerPointerDown.bind(this), {\n signal\n });\n this.#textLayer.div.classList.add(\"highlighting\");\n }\n }\n disableTextSelection() {\n this.div.tabIndex = 0;\n if (this.#textLayer?.div && this.#textSelectionAC) {\n this.#textSelectionAC.abort();\n this.#textSelectionAC = null;\n this.#textLayer.div.classList.remove(\"highlighting\");\n }\n }\n #textLayerPointerDown(event) {\n this.#uiManager.unselectAll();\n const {\n target\n } = event;\n if (target === this.#textLayer.div || (target.getAttribute(\"role\") === \"img\" || target.classList.contains(\"endOfContent\")) && this.#textLayer.div.contains(target)) {\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.button !== 0 || event.ctrlKey && isMac) {\n return;\n }\n this.#uiManager.showAllEditors(\"highlight\", true, true);\n this.#textLayer.div.classList.add(\"free\");\n this.toggleDrawing();\n HighlightEditor.startHighlighting(this, this.#uiManager.direction === \"ltr\", {\n target: this.#textLayer.div,\n x: event.x,\n y: event.y\n });\n this.#textLayer.div.addEventListener(\"pointerup\", () => {\n this.#textLayer.div.classList.remove(\"free\");\n this.toggleDrawing(true);\n }, {\n once: true,\n signal: this.#uiManager._signal\n });\n event.preventDefault();\n }\n }\n enableClick() {\n if (this.#clickAC) {\n return;\n }\n this.#clickAC = new AbortController();\n const signal = this.#uiManager.combinedSignal(this.#clickAC);\n this.div.addEventListener(\"pointerdown\", this.pointerdown.bind(this), {\n signal\n });\n const pointerup = this.pointerup.bind(this);\n this.div.addEventListener(\"pointerup\", pointerup, {\n signal\n });\n this.div.addEventListener(\"pointercancel\", pointerup, {\n signal\n });\n }\n disableClick() {\n this.#clickAC?.abort();\n this.#clickAC = null;\n }\n attach(editor) {\n this.#editors.set(editor.id, editor);\n const {\n annotationElementId\n } = editor;\n if (annotationElementId && this.#uiManager.isDeletedAnnotationElement(annotationElementId)) {\n this.#uiManager.removeDeletedAnnotationElement(editor);\n }\n }\n detach(editor) {\n this.#editors.delete(editor.id);\n this.#accessibilityManager?.removePointerInTextLayer(editor.contentDiv);\n if (!this.#isDisabling && editor.annotationElementId) {\n this.#uiManager.addDeletedAnnotationElement(editor);\n }\n }\n remove(editor) {\n this.detach(editor);\n this.#uiManager.removeEditor(editor);\n editor.div.remove();\n editor.isAttachedToDOM = false;\n }\n changeParent(editor) {\n if (editor.parent === this) {\n return;\n }\n if (editor.parent && editor.annotationElementId) {\n this.#uiManager.addDeletedAnnotationElement(editor.annotationElementId);\n AnnotationEditor.deleteAnnotationElement(editor);\n editor.annotationElementId = null;\n }\n this.attach(editor);\n editor.parent?.detach(editor);\n editor.setParent(this);\n if (editor.div && editor.isAttachedToDOM) {\n editor.div.remove();\n this.div.append(editor.div);\n }\n }\n add(editor) {\n if (editor.parent === this && editor.isAttachedToDOM) {\n return;\n }\n this.changeParent(editor);\n this.#uiManager.addEditor(editor);\n this.attach(editor);\n if (!editor.isAttachedToDOM) {\n const div = editor.render();\n this.div.append(div);\n editor.isAttachedToDOM = true;\n }\n editor.fixAndSetPosition();\n editor.onceAdded(!this.#isEnabling);\n this.#uiManager.addToAnnotationStorage(editor);\n editor._reportTelemetry(editor.telemetryInitialData);\n }\n moveEditorInDOM(editor) {\n if (!editor.isAttachedToDOM) {\n return;\n }\n const {\n activeElement\n } = document;\n if (editor.div.contains(activeElement) && !this.#editorFocusTimeoutId) {\n editor._focusEventsAllowed = false;\n this.#editorFocusTimeoutId = setTimeout(() => {\n this.#editorFocusTimeoutId = null;\n if (!editor.div.contains(document.activeElement)) {\n editor.div.addEventListener(\"focusin\", () => {\n editor._focusEventsAllowed = true;\n }, {\n once: true,\n signal: this.#uiManager._signal\n });\n activeElement.focus();\n } else {\n editor._focusEventsAllowed = true;\n }\n }, 0);\n }\n editor._structTreeParentId = this.#accessibilityManager?.moveElementInDOM(this.div, editor.div, editor.contentDiv, true);\n }\n addOrRebuild(editor) {\n if (editor.needsToBeRebuilt()) {\n editor.parent ||= this;\n editor.rebuild();\n editor.show();\n } else {\n this.add(editor);\n }\n }\n addUndoableEditor(editor) {\n const cmd = () => editor._uiManager.rebuild(editor);\n const undo = () => {\n editor.remove();\n };\n this.addCommands({\n cmd,\n undo,\n mustExec: false\n });\n }\n getNextId() {\n return this.#uiManager.getId();\n }\n get #currentEditorType() {\n return AnnotationEditorLayer.#editorTypes.get(this.#uiManager.getMode());\n }\n combinedSignal(ac) {\n return this.#uiManager.combinedSignal(ac);\n }\n #createNewEditor(params) {\n const editorType = this.#currentEditorType;\n return editorType ? new editorType.prototype.constructor(params) : null;\n }\n canCreateNewEmptyEditor() {\n return this.#currentEditorType?.canCreateNewEmptyEditor();\n }\n pasteEditor(mode, params) {\n this.#uiManager.updateToolbar(mode);\n this.#uiManager.updateMode(mode);\n const {\n offsetX,\n offsetY\n } = this.#getCenterPoint();\n const id = this.getNextId();\n const editor = this.#createNewEditor({\n parent: this,\n id,\n x: offsetX,\n y: offsetY,\n uiManager: this.#uiManager,\n isCentered: true,\n ...params\n });\n if (editor) {\n this.add(editor);\n }\n }\n async deserialize(data) {\n return (await AnnotationEditorLayer.#editorTypes.get(data.annotationType ?? data.annotationEditorType)?.deserialize(data, this, this.#uiManager)) || null;\n }\n createAndAddNewEditor(event, isCentered, data = {}) {\n const id = this.getNextId();\n const editor = this.#createNewEditor({\n parent: this,\n id,\n x: event.offsetX,\n y: event.offsetY,\n uiManager: this.#uiManager,\n isCentered,\n ...data\n });\n if (editor) {\n this.add(editor);\n }\n return editor;\n }\n #getCenterPoint() {\n const {\n x,\n y,\n width,\n height\n } = this.div.getBoundingClientRect();\n const tlX = Math.max(0, x);\n const tlY = Math.max(0, y);\n const brX = Math.min(window.innerWidth, x + width);\n const brY = Math.min(window.innerHeight, y + height);\n const centerX = (tlX + brX) / 2 - x;\n const centerY = (tlY + brY) / 2 - y;\n const [offsetX, offsetY] = this.viewport.rotation % 180 === 0 ? [centerX, centerY] : [centerY, centerX];\n return {\n offsetX,\n offsetY\n };\n }\n addNewEditor() {\n this.createAndAddNewEditor(this.#getCenterPoint(), true);\n }\n setSelected(editor) {\n this.#uiManager.setSelected(editor);\n }\n toggleSelected(editor) {\n this.#uiManager.toggleSelected(editor);\n }\n unselect(editor) {\n this.#uiManager.unselect(editor);\n }\n pointerup(event) {\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.button !== 0 || event.ctrlKey && isMac) {\n return;\n }\n if (event.target !== this.div) {\n return;\n }\n if (!this.#hadPointerDown) {\n return;\n }\n this.#hadPointerDown = false;\n if (this.#currentEditorType?.isDrawer && this.#currentEditorType.supportMultipleDrawings) {\n return;\n }\n if (!this.#allowClick) {\n this.#allowClick = true;\n return;\n }\n if (this.#uiManager.getMode() === AnnotationEditorType.STAMP) {\n this.#uiManager.unselectAll();\n return;\n }\n this.createAndAddNewEditor(event, false);\n }\n pointerdown(event) {\n if (this.#uiManager.getMode() === AnnotationEditorType.HIGHLIGHT) {\n this.enableTextSelection();\n }\n if (this.#hadPointerDown) {\n this.#hadPointerDown = false;\n return;\n }\n const {\n isMac\n } = util_FeatureTest.platform;\n if (event.button !== 0 || event.ctrlKey && isMac) {\n return;\n }\n if (event.target !== this.div) {\n return;\n }\n this.#hadPointerDown = true;\n if (this.#currentEditorType?.isDrawer) {\n this.startDrawingSession(event);\n return;\n }\n const editor = this.#uiManager.getActive();\n this.#allowClick = !editor || editor.isEmpty();\n }\n startDrawingSession(event) {\n this.div.focus();\n if (this.#drawingAC) {\n this.#currentEditorType.startDrawing(this, this.#uiManager, false, event);\n return;\n }\n this.#uiManager.setCurrentDrawingSession(this);\n this.#drawingAC = new AbortController();\n const signal = this.#uiManager.combinedSignal(this.#drawingAC);\n this.div.addEventListener(\"blur\", ({\n relatedTarget\n }) => {\n if (relatedTarget && !this.div.contains(relatedTarget)) {\n this.#focusedElement = null;\n this.commitOrRemove();\n }\n }, {\n signal\n });\n this.#currentEditorType.startDrawing(this, this.#uiManager, false, event);\n }\n pause(on) {\n if (on) {\n const {\n activeElement\n } = document;\n if (this.div.contains(activeElement)) {\n this.#focusedElement = activeElement;\n }\n return;\n }\n if (this.#focusedElement) {\n setTimeout(() => {\n this.#focusedElement?.focus();\n this.#focusedElement = null;\n }, 0);\n }\n }\n endDrawingSession(isAborted = false) {\n if (!this.#drawingAC) {\n return null;\n }\n this.#uiManager.setCurrentDrawingSession(null);\n this.#drawingAC.abort();\n this.#drawingAC = null;\n this.#focusedElement = null;\n return this.#currentEditorType.endDrawing(isAborted);\n }\n findNewParent(editor, x, y) {\n const layer = this.#uiManager.findParent(x, y);\n if (layer === null || layer === this) {\n return false;\n }\n layer.changeParent(editor);\n return true;\n }\n commitOrRemove() {\n if (this.#drawingAC) {\n this.endDrawingSession();\n return true;\n }\n return false;\n }\n onScaleChanging() {\n if (!this.#drawingAC) {\n return;\n }\n this.#currentEditorType.onScaleChangingWhenDrawing(this);\n }\n destroy() {\n this.commitOrRemove();\n if (this.#uiManager.getActive()?.parent === this) {\n this.#uiManager.commitOrRemove();\n this.#uiManager.setActiveEditor(null);\n }\n if (this.#editorFocusTimeoutId) {\n clearTimeout(this.#editorFocusTimeoutId);\n this.#editorFocusTimeoutId = null;\n }\n for (const editor of this.#editors.values()) {\n this.#accessibilityManager?.removePointerInTextLayer(editor.contentDiv);\n editor.setParent(null);\n editor.isAttachedToDOM = false;\n editor.div.remove();\n }\n this.div = null;\n this.#editors.clear();\n this.#uiManager.removeLayer(this);\n }\n #cleanup() {\n for (const editor of this.#editors.values()) {\n if (editor.isEmpty()) {\n editor.remove();\n }\n }\n }\n render({\n viewport\n }) {\n this.viewport = viewport;\n setLayerDimensions(this.div, viewport);\n for (const editor of this.#uiManager.getEditors(this.pageIndex)) {\n this.add(editor);\n editor.rebuild();\n }\n this.updateMode();\n }\n update({\n viewport\n }) {\n this.#uiManager.commitOrRemove();\n this.#cleanup();\n const oldRotation = this.viewport.rotation;\n const rotation = viewport.rotation;\n this.viewport = viewport;\n setLayerDimensions(this.div, {\n rotation\n });\n if (oldRotation !== rotation) {\n for (const editor of this.#editors.values()) {\n editor.rotate(rotation);\n }\n }\n }\n get pageDimensions() {\n const {\n pageWidth,\n pageHeight\n } = this.viewport.rawDims;\n return [pageWidth, pageHeight];\n }\n get scale() {\n return this.#uiManager.viewParameters.realScale;\n }\n}\n\n;// ./src/display/draw_layer.js\n\n\nclass DrawLayer {\n #parent = null;\n #id = 0;\n #mapping = new Map();\n #toUpdate = new Map();\n constructor({\n pageIndex\n }) {\n this.pageIndex = pageIndex;\n }\n setParent(parent) {\n if (!this.#parent) {\n this.#parent = parent;\n return;\n }\n if (this.#parent !== parent) {\n if (this.#mapping.size > 0) {\n for (const root of this.#mapping.values()) {\n root.remove();\n parent.append(root);\n }\n }\n this.#parent = parent;\n }\n }\n static get _svgFactory() {\n return shadow(this, \"_svgFactory\", new DOMSVGFactory());\n }\n static #setBox(element, [x, y, width, height]) {\n const {\n style\n } = element;\n style.top = `${100 * y}%`;\n style.left = `${100 * x}%`;\n style.width = `${100 * width}%`;\n style.height = `${100 * height}%`;\n }\n #createSVG() {\n const svg = DrawLayer._svgFactory.create(1, 1, true);\n this.#parent.append(svg);\n svg.setAttribute(\"aria-hidden\", true);\n return svg;\n }\n #createClipPath(defs, pathId) {\n const clipPath = DrawLayer._svgFactory.createElement(\"clipPath\");\n defs.append(clipPath);\n const clipPathId = `clip_${pathId}`;\n clipPath.setAttribute(\"id\", clipPathId);\n clipPath.setAttribute(\"clipPathUnits\", \"objectBoundingBox\");\n const clipPathUse = DrawLayer._svgFactory.createElement(\"use\");\n clipPath.append(clipPathUse);\n clipPathUse.setAttribute(\"href\", `#${pathId}`);\n clipPathUse.classList.add(\"clip\");\n return clipPathId;\n }\n #updateProperties(element, properties) {\n for (const [key, value] of Object.entries(properties)) {\n if (value === null) {\n element.removeAttribute(key);\n } else {\n element.setAttribute(key, value);\n }\n }\n }\n draw(properties, isPathUpdatable = false, hasClip = false) {\n const id = this.#id++;\n const root = this.#createSVG();\n const defs = DrawLayer._svgFactory.createElement(\"defs\");\n root.append(defs);\n const path = DrawLayer._svgFactory.createElement(\"path\");\n defs.append(path);\n const pathId = `path_p${this.pageIndex}_${id}`;\n path.setAttribute(\"id\", pathId);\n path.setAttribute(\"vector-effect\", \"non-scaling-stroke\");\n if (isPathUpdatable) {\n this.#toUpdate.set(id, path);\n }\n const clipPathId = hasClip ? this.#createClipPath(defs, pathId) : null;\n const use = DrawLayer._svgFactory.createElement(\"use\");\n root.append(use);\n use.setAttribute(\"href\", `#${pathId}`);\n this.updateProperties(root, properties);\n this.#mapping.set(id, root);\n return {\n id,\n clipPathId: `url(#${clipPathId})`\n };\n }\n drawOutline(properties, mustRemoveSelfIntersections) {\n const id = this.#id++;\n const root = this.#createSVG();\n const defs = DrawLayer._svgFactory.createElement(\"defs\");\n root.append(defs);\n const path = DrawLayer._svgFactory.createElement(\"path\");\n defs.append(path);\n const pathId = `path_p${this.pageIndex}_${id}`;\n path.setAttribute(\"id\", pathId);\n path.setAttribute(\"vector-effect\", \"non-scaling-stroke\");\n let maskId;\n if (mustRemoveSelfIntersections) {\n const mask = DrawLayer._svgFactory.createElement(\"mask\");\n defs.append(mask);\n maskId = `mask_p${this.pageIndex}_${id}`;\n mask.setAttribute(\"id\", maskId);\n mask.setAttribute(\"maskUnits\", \"objectBoundingBox\");\n const rect = DrawLayer._svgFactory.createElement(\"rect\");\n mask.append(rect);\n rect.setAttribute(\"width\", \"1\");\n rect.setAttribute(\"height\", \"1\");\n rect.setAttribute(\"fill\", \"white\");\n const use = DrawLayer._svgFactory.createElement(\"use\");\n mask.append(use);\n use.setAttribute(\"href\", `#${pathId}`);\n use.setAttribute(\"stroke\", \"none\");\n use.setAttribute(\"fill\", \"black\");\n use.setAttribute(\"fill-rule\", \"nonzero\");\n use.classList.add(\"mask\");\n }\n const use1 = DrawLayer._svgFactory.createElement(\"use\");\n root.append(use1);\n use1.setAttribute(\"href\", `#${pathId}`);\n if (maskId) {\n use1.setAttribute(\"mask\", `url(#${maskId})`);\n }\n const use2 = use1.cloneNode();\n root.append(use2);\n use1.classList.add(\"mainOutline\");\n use2.classList.add(\"secondaryOutline\");\n this.updateProperties(root, properties);\n this.#mapping.set(id, root);\n return id;\n }\n finalizeDraw(id, properties) {\n this.#toUpdate.delete(id);\n this.updateProperties(id, properties);\n }\n updateProperties(elementOrId, properties) {\n if (!properties) {\n return;\n }\n const {\n root,\n bbox,\n rootClass,\n path\n } = properties;\n const element = typeof elementOrId === \"number\" ? this.#mapping.get(elementOrId) : elementOrId;\n if (!element) {\n return;\n }\n if (root) {\n this.#updateProperties(element, root);\n }\n if (bbox) {\n DrawLayer.#setBox(element, bbox);\n }\n if (rootClass) {\n const {\n classList\n } = element;\n for (const [className, value] of Object.entries(rootClass)) {\n classList.toggle(className, value);\n }\n }\n if (path) {\n const defs = element.firstChild;\n const pathElement = defs.firstChild;\n this.#updateProperties(pathElement, path);\n }\n }\n updateParent(id, layer) {\n if (layer === this) {\n return;\n }\n const root = this.#mapping.get(id);\n if (!root) {\n return;\n }\n layer.#parent.append(root);\n this.#mapping.delete(id);\n layer.#mapping.set(id, root);\n }\n remove(id) {\n this.#toUpdate.delete(id);\n if (this.#parent === null) {\n return;\n }\n this.#mapping.get(id).remove();\n this.#mapping.delete(id);\n }\n destroy() {\n this.#parent = null;\n for (const root of this.#mapping.values()) {\n root.remove();\n }\n this.#mapping.clear();\n this.#toUpdate.clear();\n }\n}\n\n;// ./src/pdf.js\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nconst pdfjsVersion = \"4.10.38\";\nconst pdfjsBuild = \"f9bea397f\";\n{\n globalThis.pdfjsTestingUtils = {\n HighlightOutliner: HighlightOutliner\n };\n}\n\nvar __webpack_exports__AbortException = __webpack_exports__.AbortException;\nvar __webpack_exports__AnnotationEditorLayer = __webpack_exports__.AnnotationEditorLayer;\nvar __webpack_exports__AnnotationEditorParamsType = __webpack_exports__.AnnotationEditorParamsType;\nvar __webpack_exports__AnnotationEditorType = __webpack_exports__.AnnotationEditorType;\nvar __webpack_exports__AnnotationEditorUIManager = __webpack_exports__.AnnotationEditorUIManager;\nvar __webpack_exports__AnnotationLayer = __webpack_exports__.AnnotationLayer;\nvar __webpack_exports__AnnotationMode = __webpack_exports__.AnnotationMode;\nvar __webpack_exports__ColorPicker = __webpack_exports__.ColorPicker;\nvar __webpack_exports__DOMSVGFactory = __webpack_exports__.DOMSVGFactory;\nvar __webpack_exports__DrawLayer = __webpack_exports__.DrawLayer;\nvar __webpack_exports__FeatureTest = __webpack_exports__.FeatureTest;\nvar __webpack_exports__GlobalWorkerOptions = __webpack_exports__.GlobalWorkerOptions;\nvar __webpack_exports__ImageKind = __webpack_exports__.ImageKind;\nvar __webpack_exports__InvalidPDFException = __webpack_exports__.InvalidPDFException;\nvar __webpack_exports__MissingPDFException = __webpack_exports__.MissingPDFException;\nvar __webpack_exports__OPS = __webpack_exports__.OPS;\nvar __webpack_exports__OutputScale = __webpack_exports__.OutputScale;\nvar __webpack_exports__PDFDataRangeTransport = __webpack_exports__.PDFDataRangeTransport;\nvar __webpack_exports__PDFDateString = __webpack_exports__.PDFDateString;\nvar __webpack_exports__PDFWorker = __webpack_exports__.PDFWorker;\nvar __webpack_exports__PasswordResponses = __webpack_exports__.PasswordResponses;\nvar __webpack_exports__PermissionFlag = __webpack_exports__.PermissionFlag;\nvar __webpack_exports__PixelsPerInch = __webpack_exports__.PixelsPerInch;\nvar __webpack_exports__RenderingCancelledException = __webpack_exports__.RenderingCancelledException;\nvar __webpack_exports__TextLayer = __webpack_exports__.TextLayer;\nvar __webpack_exports__TouchManager = __webpack_exports__.TouchManager;\nvar __webpack_exports__UnexpectedResponseException = __webpack_exports__.UnexpectedResponseException;\nvar __webpack_exports__Util = __webpack_exports__.Util;\nvar __webpack_exports__VerbosityLevel = __webpack_exports__.VerbosityLevel;\nvar __webpack_exports__XfaLayer = __webpack_exports__.XfaLayer;\nvar __webpack_exports__build = __webpack_exports__.build;\nvar __webpack_exports__createValidAbsoluteUrl = __webpack_exports__.createValidAbsoluteUrl;\nvar __webpack_exports__fetchData = __webpack_exports__.fetchData;\nvar __webpack_exports__getDocument = __webpack_exports__.getDocument;\nvar __webpack_exports__getFilenameFromUrl = __webpack_exports__.getFilenameFromUrl;\nvar __webpack_exports__getPdfFilenameFromUrl = __webpack_exports__.getPdfFilenameFromUrl;\nvar __webpack_exports__getXfaPageViewport = __webpack_exports__.getXfaPageViewport;\nvar __webpack_exports__isDataScheme = __webpack_exports__.isDataScheme;\nvar __webpack_exports__isPdfFile = __webpack_exports__.isPdfFile;\nvar __webpack_exports__noContextMenu = __webpack_exports__.noContextMenu;\nvar __webpack_exports__normalizeUnicode = __webpack_exports__.normalizeUnicode;\nvar __webpack_exports__setLayerDimensions = __webpack_exports__.setLayerDimensions;\nvar __webpack_exports__shadow = __webpack_exports__.shadow;\nvar __webpack_exports__stopEvent = __webpack_exports__.stopEvent;\nvar __webpack_exports__version = __webpack_exports__.version;\nexport { __webpack_exports__AbortException as AbortException, __webpack_exports__AnnotationEditorLayer as AnnotationEditorLayer, __webpack_exports__AnnotationEditorParamsType as AnnotationEditorParamsType, __webpack_exports__AnnotationEditorType as AnnotationEditorType, __webpack_exports__AnnotationEditorUIManager as AnnotationEditorUIManager, __webpack_exports__AnnotationLayer as AnnotationLayer, __webpack_exports__AnnotationMode as AnnotationMode, __webpack_exports__ColorPicker as ColorPicker, __webpack_exports__DOMSVGFactory as DOMSVGFactory, __webpack_exports__DrawLayer as DrawLayer, __webpack_exports__FeatureTest as FeatureTest, __webpack_exports__GlobalWorkerOptions as GlobalWorkerOptions, __webpack_exports__ImageKind as ImageKind, __webpack_exports__InvalidPDFException as InvalidPDFException, __webpack_exports__MissingPDFException as MissingPDFException, __webpack_exports__OPS as OPS, __webpack_exports__OutputScale as OutputScale, __webpack_exports__PDFDataRangeTransport as PDFDataRangeTransport, __webpack_exports__PDFDateString as PDFDateString, __webpack_exports__PDFWorker as PDFWorker, __webpack_exports__PasswordResponses as PasswordResponses, __webpack_exports__PermissionFlag as PermissionFlag, __webpack_exports__PixelsPerInch as PixelsPerInch, __webpack_exports__RenderingCancelledException as RenderingCancelledException, __webpack_exports__TextLayer as TextLayer, __webpack_exports__TouchManager as TouchManager, __webpack_exports__UnexpectedResponseException as UnexpectedResponseException, __webpack_exports__Util as Util, __webpack_exports__VerbosityLevel as VerbosityLevel, __webpack_exports__XfaLayer as XfaLayer, __webpack_exports__build as build, __webpack_exports__createValidAbsoluteUrl as createValidAbsoluteUrl, __webpack_exports__fetchData as fetchData, __webpack_exports__getDocument as getDocument, __webpack_exports__getFilenameFromUrl as getFilenameFromUrl, __webpack_exports__getPdfFilenameFromUrl as getPdfFilenameFromUrl, __webpack_exports__getXfaPageViewport as getXfaPageViewport, __webpack_exports__isDataScheme as isDataScheme, __webpack_exports__isPdfFile as isPdfFile, __webpack_exports__noContextMenu as noContextMenu, __webpack_exports__normalizeUnicode as normalizeUnicode, __webpack_exports__setLayerDimensions as setLayerDimensions, __webpack_exports__shadow as shadow, __webpack_exports__stopEvent as stopEvent, __webpack_exports__version as version };\n\n//# sourceMappingURL=pdf.mjs.map","export default \"__VITE_ASSET__dOxINKRE__\"","import { generateUUIDv4 } from '@bitjourney/uuid-v4';\nimport * as pdfjsLib from 'pdfjs-dist';\nimport workerUrl from 'pdfjs-dist/build/pdf.worker.mjs?url';\n\npdfjsLib.GlobalWorkerOptions.workerSrc = workerUrl;\n\nexport function ordinal(n: number) {\n const ordinals = [\n 'første',\n 'andre',\n 'tredje',\n 'fjerde',\n 'femte',\n 'sjette',\n 'syvende',\n 'åttende',\n 'niende',\n 'tiende',\n 'ellevte',\n 'tolvte',\n ];\n if (n < 13) {\n return ordinals[n - 1];\n }\n return n + '.';\n}\n\nexport function uuid(): string {\n return generateUUIDv4();\n}\n\n/**\n * Joins the members of the array seperated by comman and the last elements seperated by ' og ' (and).\n * @param list\n */\nexport function joinWithAnd(list: string[]): string {\n let text = '';\n list.forEach(function (item, index) {\n let divider = '';\n if (index < list.length - 1 && list.length > 2) {\n divider = ', ';\n }\n if (index === list.length - 2) {\n divider = ' og ';\n }\n text += item + divider;\n });\n return text;\n}\n\nexport function namesListFromUuids(list: { value: string; text: string }[], uuids: string[]) {\n return joinWithAnd(list.filter((l) => uuids.includes(l.value)).map((l) => l.text));\n}\n\nexport function numberWord(n: number, neuter: boolean = false): string {\n if (n === 0) {\n return 'ingen';\n }\n if (n === 1) {\n if (neuter) {\n return 'ett';\n }\n return 'én';\n }\n if (n === 2) {\n return 'to';\n }\n if (n === 3) {\n return 'tre';\n }\n if (n === 4) {\n return 'fire';\n }\n if (n === 5) {\n return 'fem';\n }\n if (n === 6) {\n return 'seks';\n }\n if (n === 7) {\n return 'syv';\n }\n if (n === 8) {\n return 'åtte';\n }\n if (n === 9) {\n return 'ni';\n }\n if (n === 10) {\n return 'ti';\n }\n if (n === 11) {\n return 'elleve';\n }\n if (n === 12) {\n return 'tolv';\n }\n return n.toString();\n}\n\nexport function capitalize(string: string) {\n return string.charAt(0).toUpperCase() + string.slice(1);\n}\n\nfunction zeropad(n) {\n return ('00' + n).slice(-2);\n}\n\nexport function minutesToTime(n) {\n const toFive = Math.floor(n / 5) * 5;\n const hours = toFive / 60;\n const rhours = Math.floor(hours);\n const minutes = (hours - rhours) * 60;\n const rminutes = Math.round(minutes);\n return zeropad(rhours) + ':' + zeropad(rminutes);\n}\n\nexport function isEmptyOrInvalidString(string) {\n if (string === undefined || string === null) {\n return true;\n }\n return string.replace(' ', '').trim() === '';\n}\n\nexport function isEmptyHtmlContent(s: string | undefined): boolean {\n return s === undefined || s === '' || s === '';\n}\n\nfunction prepHtml(string: string): string {\n return string\n .replace(/ {2}|\\r\\n|\\n|\\r/gm, '')\n .replaceAll('> <', '><')\n .replaceAll('', '
')\n .replaceAll('
', '')\n .replaceAll('
', '
')\n .replaceAll('
', '
')\n .replaceAll('
', '
');\n}\n\nexport function isSameHtmlContent(a: string, b: string): boolean {\n return prepHtml(a) === prepHtml(b);\n}\n\nexport function displayName(s: string | undefined | null, defaultValue: string = 'uten navn'): string {\n const s1 = s ?? '';\n return s1 === '' ? defaultValue : s1;\n}\n\nexport function formatDuration(minutes: number): string {\n const hours = Math.floor(minutes / 60);\n const remainingMinutes = minutes % 60;\n\n const formattedHours = hours < 10 ? `0${hours}` : `${hours}`;\n const formattedMinutes = remainingMinutes < 10 ? `0${remainingMinutes}` : `${remainingMinutes}`;\n\n return `${formattedHours}:${formattedMinutes}`;\n}\n\nexport function convertToMinutes(timeString: string): number {\n const [hoursString, minutesString] = timeString.split(':');\n const hours = parseInt(hoursString, 10);\n const minutes = parseInt(minutesString, 10);\n\n if (isNaN(hours) || isNaN(minutes)) {\n throw new Error('Invalid time format. Please provide time in \"hh:mm\" format.');\n }\n\n return hours * 60 + minutes;\n}\n\nexport function toDateTimeDuration(dateTime1: string, durationMinutes: number): string {\n const dateTime = dateTime1;\n const hasTime = dateTime.split(' ').length === 2;\n return dateTime + (hasTime ? ` ${durationMinutes}` : '');\n}\n\nexport function levenshteinDistance(str1: string, str2: string): number {\n str1 = str1.toLowerCase();\n str2 = str2.toLowerCase();\n const len1 = str1.length;\n const len2 = str2.length;\n const matrix = Array(len1 + 1);\n for (let i = 0; i <= len1; i++) {\n matrix[i] = Array(len2 + 1);\n }\n for (let i = 0; i <= len1; i++) {\n matrix[i][0] = i;\n }\n for (let j = 0; j <= len2; j++) {\n matrix[0][j] = j;\n }\n for (let i = 1; i <= len1; i++) {\n for (let j = 1; j <= len2; j++) {\n if (str1[i - 1] === str2[j - 1]) {\n matrix[i][j] = matrix[i - 1][j - 1];\n } else {\n matrix[i][j] = Math.min(matrix[i - 1][j] + 1, matrix[i][j - 1] + 1, matrix[i - 1][j - 1] + 1);\n }\n }\n }\n return matrix[len1][len2];\n}\n\nexport function entityNameForLists(\n name: string | undefined,\n draftName: string | undefined,\n isConfirmedEntity: boolean,\n): string {\n let result: string;\n if (!isConfirmedEntity) {\n result = '(Utkast: ';\n if (name) {\n result += name + ')';\n } else if (draftName) {\n result += draftName + ')';\n } else {\n result += 'Uten navn)';\n }\n } else {\n result = name || 'UTEN NAVN';\n }\n return result;\n}\n\nexport function shorten(text: string, length: number) {\n if (text.length < length) {\n return text;\n }\n return text.substring(0, length - 2) + '…';\n}\n\nasync function fetchPDF(url: string): Promise {\n const response = await fetch(url);\n if (!response.ok) {\n throw new Error(`Failed to fetch PDF: ${response.statusText}`);\n }\n return await response.arrayBuffer();\n}\n\nasync function extractTextFromPDF(pdfData: ArrayBuffer): Promise {\n const pdf = await pdfjsLib.getDocument({ data: pdfData }).promise;\n const maxPages = pdf.numPages;\n const pageTextPromises: Promise[] = [];\n\n for (let pageNum = 1; pageNum <= maxPages; pageNum++) {\n const page = await pdf.getPage(pageNum);\n const textContent = await page.getTextContent();\n const pageText = textContent.items.map((item) => (item as any).str).join(' ');\n pageTextPromises.push(Promise.resolve(pageText));\n }\n\n const pageTexts = await Promise.all(pageTextPromises);\n return pageTexts.join('\\n');\n}\n\nexport async function fetchAndExtractText(pdfUrl: string): Promise {\n try {\n const pdfData = await fetchPDF(pdfUrl);\n return await extractTextFromPDF(pdfData);\n } catch (error) {\n console.error('Error:', error);\n return '';\n }\n}\n\nexport function memoizeAsync Promise>(fn: F): F {\n const cache = new Map>>();\n\n return (async (...args: Parameters): Promise> => {\n const key = JSON.stringify(args);\n if (!cache.has(key)) {\n cache.set(key, fn(...args));\n }\n return cache.get(key)!;\n }) as F;\n}\n\nexport const memoizedFetchAndExtract = memoizeAsync(fetchAndExtractText);\n\nexport function abbreviateDescription(description: string, maxLength: number = 40): string {\n if (description.length <= maxLength) {\n return description;\n }\n\n // Try to find the last space within maxLength\n const truncated = description.slice(0, maxLength);\n const lastSpace = truncated.lastIndexOf(' ');\n\n if (lastSpace > 0) {\n return truncated.slice(0, lastSpace) + '...';\n }\n\n // If no space found, just cut off at maxLength\n return truncated + '...';\n}\n","import { css, html, nothing } from 'lit';\nimport { customElement, property } from 'lit/decorators.js';\nimport '../../elements/d-label.js';\nimport { LabeledElement } from '../../abstracts/labeled-element.js';\nimport { isEmptyOrInvalidString } from 'src/utilities/text';\nimport type { SelectDropdownOption } from './select-dropdown-option';\n\n/**\n *\n *\n * @fires value-changed - Dispatched immediately after changes by the user\n *\n * STATUS OK\n */\n@customElement('d-select-dropdown')\nexport class DSelectDropdown extends LabeledElement {\n static readonly styles = [\n ...LabeledElement.styles,\n css`\n :host([action-style]) {\n margin: -6px -8px;\n }\n .select-wrapper {\n display: block;\n background-image: url(/images/selectbox-image.svg);\n background-repeat: no-repeat;\n background-position: right center;\n background-size: 32px 32px;\n overflow: hidden;\n }\n\n :host([action-style]) .select-wrapper {\n border: none;\n background: none;\n box-shadow: none;\n }\n\n :host([no-arrow]) .select-wrapper,\n :host([link-style]) .select-wrapper {\n background-image: none;\n }\n\n :host([small]) .select-wrapper {\n background: none;\n box-shadow: none;\n }\n\n :host([toolbar]) .select-wrapper {\n box-shadow: none;\n background-color: hsl(0, 0%, 92%);\n border-radius: 4px;\n }\n\n :host([invalid]) .select-wrapper {\n border: 1px solid var(--alertColor);\n margin-left: -1px;\n margin-right: -1px;\n }\n\n :host([theme-page]) .select-wrapper {\n background-color: white;\n }\n\n :host([toolbar]) select {\n font-family: var(--mainSans), sans-serif;\n }\n\n :host([disabled-as-view-text]) .select-wrapper[disabled] {\n background: none;\n box-shadow: none;\n opacity: 1;\n }\n\n .select-wrapper[disabled] select,\n .select-wrapper[disabled] select.placeholder {\n opacity: 1;\n }\n\n :host([disabled-as-view-text]) .select-wrapper[disabled] select {\n padding-left: 0;\n }\n\n select {\n display: flex;\n width: calc(100% + 18px);\n align-items: center;\n box-sizing: border-box;\n border: none;\n outline: none;\n padding: var(--select-dropdown-text-padding, 6px 30px 0 10px);\n background: transparent;\n font-family: var(--mainSerif), serif;\n font-size: 15px;\n color: black;\n cursor: pointer;\n -webkit-appearance: none;\n -moz-appearance: none;\n }\n\n :host([action-style]) select {\n width: 100%;\n padding: 6px 8px;\n font-family: var(--mainSans);\n color: var(--themeColor);\n }\n\n @media (hover: hover) {\n :host([action-style]) select:not([disabled]):hover {\n color: black;\n }\n }\n\n select[disabled] {\n cursor: default;\n }\n\n select[disabled] > option {\n color: black;\n }\n\n :host([no-arrow]) select,\n :host([small]) select {\n padding-right: 6px;\n }\n\n :host([small]) select {\n padding: 7px 0 7px 0;\n font-family: var(--narrow), sans-serif;\n font-size: 14px;\n font-weight: 300;\n }\n `,\n ];\n @property({ type: String })\n placeholder = '';\n @property({ type: Boolean })\n unselectablePlaceholder = false;\n @property({ type: String })\n value = '';\n @property({ type: Boolean })\n disabled = false;\n @property({ type: Boolean, attribute: 'disabled-as-view-text', reflect: true })\n disabledAsViewText = false;\n @property({ type: Boolean, reflect: true })\n invalid = false;\n @property({ type: Array })\n options: SelectDropdownOption[] = [];\n @property({ type: Boolean, reflect: true })\n controller = false;\n @property({ type: Boolean, reflect: true })\n toolbar = false;\n @property({ type: Boolean, reflect: true })\n noArrow = false;\n @property({ type: Boolean, reflect: true })\n small = false;\n @property({ type: Boolean, attribute: 'mark-if-empty', reflect: true })\n markIfEmpty = false;\n\n _placeholderClass() {\n if (this.placeholder && this.placeholder !== '' && (!this.value || this.value === '')) {\n return 'placeholder';\n }\n return '';\n }\n\n _setValue(event) {\n this.value = event.target.value;\n this.dispatchEvent(\n new CustomEvent('value-changed', {\n bubbles: true,\n composed: true,\n detail: { value: this.value },\n }),\n );\n // Needed to make resize observers react\n this.blur();\n }\n\n private get inputStyle() {\n if (this.markIfEmpty && isEmptyOrInvalidString(this.value)) {\n return 'border: 1px solid var(--themeColor)';\n }\n return '';\n }\n\n protected renderContent() {\n return html`\n \n \n
\n `;\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-select-dropdown': DSelectDropdown;\n }\n}\n","import { css, html, LitElement } from 'lit';\nimport { customElement, property } from 'lit/decorators.js';\n\n/**\n * This element replaces d-collapse and iron-collapse. Currently it could be replaced by standard javascript if or\n * the when directive, but the intent is tht this element shall animate the opening and closing.\n *\n * Example https://github.com/yujiri8/expandable-section/blob/master/expandable-section.js\n *\n *\n * STATUS OK\n */\n@customElement('d-expansion')\nexport class DExpansion extends LitElement {\n static readonly styles = css`\n :host {\n display: none;\n height: 0;\n }\n\n :host([opened]) {\n display: block;\n height: auto;\n }\n\n :host([in-section]) {\n display: block;\n position: relative;\n width: 100%;\n flex-wrap: wrap;\n }\n\n :host([in-section]) ::slotted(*) {\n flex-grow: 1;\n border-image-source: url(/images/section-element-border-image.svg);\n /* border-image provides border-left */\n border-top-width: 12px;\n /* border-top-width appears as padding-top */\n border-bottom-width: 12px;\n /* border-bottom-width appears as padding-bottom */\n border-left-width: 1px;\n border-right-width: 0;\n border-style: solid;\n border-image-slice: 25%;\n border-image-repeat: repeat;\n padding: 0 12px;\n box-shadow: 0 -1px var(--borderColorTransparent);\n /* box-shadow appears as border-top */\n }\n `;\n\n @property({ type: Boolean, reflect: true })\n opened = false;\n @property({ type: Number })\n speed = 300;\n @property({ type: Boolean, attribute: 'no-open-animation' })\n noOpenAnimation = false;\n @property({ type: Boolean, attribute: 'no-close-animation' })\n noCloseAnimation = false;\n\n render() {\n return html`
`;\n }\n\n _open() {\n if (this.shadowRoot) {\n const host = this.shadowRoot.host as HTMLElement;\n if (host) {\n host.style.display = 'block';\n host.style.overflow = 'clip';\n if (this.noOpenAnimation) {\n host.style.transition = 'height 0s';\n }\n const container = this.shadowRoot.getElementById('container');\n if (container) {\n const height = container.offsetHeight;\n host.style.height = height + 'px';\n setTimeout(() => {\n host.style.height = 'auto';\n host.style.removeProperty('overflow');\n host.style.transition = 'height ' + this.speed + 'ms';\n }, this.speed);\n }\n }\n }\n }\n\n _close() {\n if (this.shadowRoot) {\n const host = this.shadowRoot.host as HTMLElement;\n if (host) {\n const height = host.offsetHeight;\n host.style.height = height + 'px';\n host.style.overflow = 'clip';\n if (this.noCloseAnimation) {\n host.style.transition = 'height 0s';\n }\n setTimeout(() => {\n host.style.height = '0px';\n setTimeout(() => {\n host.style.display = 'none';\n host.style.removeProperty('overflow');\n host.style.transition = 'height ' + this.speed + 'ms';\n }, this.speed);\n }, 0);\n }\n }\n }\n\n updated(changedProperties: Map) {\n if (changedProperties.has('opened')) {\n if (this.opened) {\n this._open();\n } else {\n this._close();\n }\n }\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-expansion': DExpansion;\n }\n}\n","import type { PropertyValueMap } from 'lit';\nimport { css, html, LitElement, nothing } from 'lit';\n\nimport { customElement, property } from 'lit/decorators.js';\nimport '../fields/d-expansion.js';\nimport '../fields/d-closer.js';\nimport '../fields/d-view-info.js';\n\n/**\n *\n * The help section closes whenever the content changes, ie in connection with navigating to a different page.\n *\n * STATUS OK\n */\n@customElement('d-help-section')\nexport class DHelpSection extends LitElement {\n private openHelp() {\n this.opened = true;\n }\n private closeHelp() {\n this.opened = false;\n }\n\n private previousContent = '';\n\n protected updated(_changedProperties: PropertyValueMap | Map): void {\n if (_changedProperties.has('content') && this.previousContent && this.opened) {\n this.opened = false;\n }\n this.previousContent = this.content;\n }\n\n private _wrapperClasses() {\n let classes = 'wrapper';\n if (this.opened) {\n classes += ' open';\n }\n return classes;\n }\n\n @property({ type: Boolean, reflect: true })\n opened = false;\n @property({ type: String })\n content = '';\n @property({ type: Boolean })\n helpOnly = false;\n\n static readonly styles = css`\n :host {\n display: block;\n font-family: var(--mainSans);\n }\n\n .wrapper {\n position: relative;\n max-width: 724px;\n box-sizing: border-box;\n padding: 8px;\n margin: 20px 0;\n background: hsla(1, 0%, 0%, 0.04) url(/images/info.svg) 1px 1px no-repeat;\n background-size: 32px 32px;\n border: 1px solid hsla(1, 0%, 0%, 0.07);\n border-radius: 20px;\n word-wrap: normal;\n transition: all 0.3s;\n cursor: pointer;\n }\n\n .wrapper.open {\n border-radius: 14px;\n background-image: none;\n cursor: default;\n }\n\n .content {\n padding: 12px;\n -webkit-user-select: text;\n -ms-user-select: text;\n -moz-user-select: text;\n user-select: text;\n }\n\n .opener {\n padding-left: 26px;\n color: var(--linkColorGray);\n line-height: 120%;\n opacity: 1;\n transition: opacity 0.3s;\n }\n\n .wrapper:hover .opener {\n color: black;\n }\n\n .wrapper.open .opener {\n opacity: 0;\n }\n\n d-view-info {\n margin-bottom: 0;\n }\n `;\n\n private get showCloser() {\n return !this.helpOnly && this.opened;\n }\n\n render() {\n return html`\n ${this.content\n ? html`\n \n
\n Hjelp, informasjon og referanser
\n \n
\n \n ${this.showCloser ? html`` : nothing}\n \n
\n \n
');\n } else {\n return '';\n }\n }\n\n @property({ type: String })\n value = '';\n @property({ type: Boolean, attribute: 'system-content', reflect: true })\n systemContent = false;\n @property({ type: Boolean, reflect: true })\n mini = false;\n @property({ type: Boolean, attribute: 'wrap-label', reflect: true })\n wrapLabel = false;\n\n renderContent() {\n return html`\n \n ${unsafeHTML(this.valueAsHtml(this.value))}\n `;\n }\n}\n\ndeclare global {\n interface HTMLElementTagNameMap {\n 'd-view-text': DViewText;\n }\n}\n","import { css } from 'lit';\n\nimport { internalLinkStyles } from './internal-link-styles';\n\nexport const htmlContentStyles = [\n css`\n .html {\n container-name: html;\n container-type: inline-size;\n font-family: var(--mainSerif), sans-serif;\n font-weight: 300;\n font-size: 16px;\n line-height: 180%;\n }\n\n .html h1 {\n margin-top: 24px;\n margin-bottom: 8px;\n font-size: 28px;\n font-weight: 500;\n line-height: 150%;\n word-wrap: break-word;\n }\n\n .html h2 {\n margin-top: 22px;\n margin-bottom: 8px;\n font-size: 20px;\n font-weight: 500;\n line-height: 150%;\n word-wrap: break-word;\n }\n\n .html.mainContent h1,\n .html.mainContent h2 {\n font-weight: 500;\n }\n\n .html h1 + h2,\n .html h2 + h2 {\n margin-top: 14px;\n }\n\n .html p {\n margin-top: 8px;\n margin-bottom: 10px;\n }\n\n .html ul,\n .html ol {\n margin-top: 8px;\n margin-bottom: 10px;\n padding-left: 40px;\n -webkit-padding-start: 40px;\n }\n\n @container html (width < 400px) {\n .html ul,\n .html ol {\n padding-left: 20px;\n -webkit-padding-start: 20px;\n }\n }\n\n .html li {\n margin-bottom: 6px;\n }\n\n .html li p {\n margin: 0;\n }\n\n .html b,\n .html strong {\n font-weight: 500;\n }\n\n .html a,\n .html ul a,\n .html ol a {\n color: var(--themeColorDarkerOne);\n text-decoration: none;\n }\n\n .html a:not([data-internal-link-doctype]),\n .html ul a:not([data-internal-link-doctype]),\n .html ol a:not([data-internal-link-doctype]) {\n border-bottom: 1px solid var(--themeColorDarkerOneTransparent);\n }\n\n .html:not(.editable) a:hover {\n color: black;\n border-bottom-color: var(--linkColorGray);\n }\n\n .html.editable a,\n .html.editable ul a,\n .html.editable ol a {\n text-decoration: none;\n }\n\n .html p:first-child,\n .html h1:first-child,\n .html h2:first-child,\n .html ul:first-child,\n .html ol:first-child {\n margin-top: 0;\n }\n\n .html p:last-child,\n .html h1:last-child,\n .html h2:last-child,\n .html ul:last-child,\n .html ol:last-child {\n margin-bottom: 0;\n }\n\n .html ul.checklist {\n list-style-type: none;\n }\n\n .html ul.checklist > li:before {\n content: '';\n display: inline-block;\n width: 18px;\n height: 18px;\n background-color: white;\n border: 2px solid silver;\n border-radius: 50%;\n position: relative;\n top: 5px;\n margin-top: -5px;\n margin-left: -30px;\n margin-right: 8px;\n }\n\n .editable.html ul.checklist > li:before {\n background-color: var(--inputElementColor);\n }\n\n .html a.reference {\n display: block;\n border: none;\n margin: 0 0 -6px 0;\n padding: 6px 0 3px 44px;\n background: url(/images/references.svg) 8px 1px no-repeat;\n background-size: 30px 30px;\n color: var(--linkColorGray);\n text-decoration: none;\n }\n\n .html a.reference.invalid {\n color: red;\n cursor: default;\n }\n\n .html a.reference:not(.invalid):hover {\n color: black;\n }\n\n ul[data-type='taskList'] {\n list-style-type: none;\n }\n\n ul[data-type='taskList'] li {\n display: flex;\n margin-bottom: 10px;\n }\n\n .editable input[type='checkbox'],\n .html:not(.editable) ul[data-type='taskList'] li:before {\n content: '';\n flex: none;\n display: block;\n appearance: none;\n box-sizing: content-box;\n width: 18px;\n height: 18px;\n position: relative;\n top: 8px;\n margin-top: -5px;\n margin-left: -30px;\n margin-right: 8px;\n border: 2px solid silver;\n border-radius: 50%;\n padding: 0;\n background-color: var(--inputElementColor);\n cursor: pointer;\n }\n\n :host([prevent-checklist]) .html:not(.editable) ul[data-type='taskList'] li:before {\n cursor: default;\n }\n\n .html:not(.editable) ul[data-type='taskList'] li:before {\n background-color: white;\n }\n\n .editable input[type='checkbox'][checked='checked'],\n .html:not(.editable) ul[data-type='taskList'] li[data-checked='true']:before {\n background-color: transparent;\n top: 2px;\n background-image: url(/images/check-blue.svg);\n background-position: 50% 50%;\n background-repeat: no-repeat;\n background-size: 36px 36px;\n border: none;\n border-radius: 0px;\n width: 30px;\n height: 30px;\n margin-left: -34px;\n margin-right: 4px;\n }\n `,\n internalLinkStyles,\n];\n","/**\n * @license\n * Lodash \n * Copyright OpenJS Foundation and other contributors \n * Released under MIT license \n * Based on Underscore.js 1.8.3 \n * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n */\n;(function() {\n\n /** Used as a safe reference for `undefined` in pre-ES5 environments. */\n var undefined;\n\n /** Used as the semantic version number. */\n var VERSION = '4.17.21';\n\n /** Used as the size to enable large array optimizations. */\n var LARGE_ARRAY_SIZE = 200;\n\n /** Error message constants. */\n var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',\n FUNC_ERROR_TEXT = 'Expected a function',\n INVALID_TEMPL_VAR_ERROR_TEXT = 'Invalid `variable` option passed into `_.template`';\n\n /** Used to stand-in for `undefined` hash values. */\n var HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n /** Used as the maximum memoize cache size. */\n var MAX_MEMOIZE_SIZE = 500;\n\n /** Used as the internal argument placeholder. */\n var PLACEHOLDER = '__lodash_placeholder__';\n\n /** Used to compose bitmasks for cloning. */\n var CLONE_DEEP_FLAG = 1,\n CLONE_FLAT_FLAG = 2,\n CLONE_SYMBOLS_FLAG = 4;\n\n /** Used to compose bitmasks for value comparisons. */\n var COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n /** Used to compose bitmasks for function metadata. */\n var WRAP_BIND_FLAG = 1,\n WRAP_BIND_KEY_FLAG = 2,\n WRAP_CURRY_BOUND_FLAG = 4,\n WRAP_CURRY_FLAG = 8,\n WRAP_CURRY_RIGHT_FLAG = 16,\n WRAP_PARTIAL_FLAG = 32,\n WRAP_PARTIAL_RIGHT_FLAG = 64,\n WRAP_ARY_FLAG = 128,\n WRAP_REARG_FLAG = 256,\n WRAP_FLIP_FLAG = 512;\n\n /** Used as default options for `_.truncate`. */\n var DEFAULT_TRUNC_LENGTH = 30,\n DEFAULT_TRUNC_OMISSION = '...';\n\n /** Used to detect hot functions by number of calls within a span of milliseconds. */\n var HOT_COUNT = 800,\n HOT_SPAN = 16;\n\n /** Used to indicate the type of lazy iteratees. */\n var LAZY_FILTER_FLAG = 1,\n LAZY_MAP_FLAG = 2,\n LAZY_WHILE_FLAG = 3;\n\n /** Used as references for various `Number` constants. */\n var INFINITY = 1 / 0,\n MAX_SAFE_INTEGER = 9007199254740991,\n MAX_INTEGER = 1.7976931348623157e+308,\n NAN = 0 / 0;\n\n /** Used as references for the maximum length and index of an array. */\n var MAX_ARRAY_LENGTH = 4294967295,\n MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,\n HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;\n\n /** Used to associate wrap methods with their bit flags. */\n var wrapFlags = [\n ['ary', WRAP_ARY_FLAG],\n ['bind', WRAP_BIND_FLAG],\n ['bindKey', WRAP_BIND_KEY_FLAG],\n ['curry', WRAP_CURRY_FLAG],\n ['curryRight', WRAP_CURRY_RIGHT_FLAG],\n ['flip', WRAP_FLIP_FLAG],\n ['partial', WRAP_PARTIAL_FLAG],\n ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],\n ['rearg', WRAP_REARG_FLAG]\n ];\n\n /** `Object#toString` result references. */\n var argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n asyncTag = '[object AsyncFunction]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n domExcTag = '[object DOMException]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n nullTag = '[object Null]',\n objectTag = '[object Object]',\n promiseTag = '[object Promise]',\n proxyTag = '[object Proxy]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]',\n undefinedTag = '[object Undefined]',\n weakMapTag = '[object WeakMap]',\n weakSetTag = '[object WeakSet]';\n\n var arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n /** Used to match empty string literals in compiled template source. */\n var reEmptyStringLeading = /\\b__p \\+= '';/g,\n reEmptyStringMiddle = /\\b(__p \\+=) '' \\+/g,\n reEmptyStringTrailing = /(__e\\(.*?\\)|\\b__t\\)) \\+\\n'';/g;\n\n /** Used to match HTML entities and HTML characters. */\n var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,\n reUnescapedHtml = /[&<>\"']/g,\n reHasEscapedHtml = RegExp(reEscapedHtml.source),\n reHasUnescapedHtml = RegExp(reUnescapedHtml.source);\n\n /** Used to match template delimiters. */\n var reEscape = /<%-([\\s\\S]+?)%>/g,\n reEvaluate = /<%([\\s\\S]+?)%>/g,\n reInterpolate = /<%=([\\s\\S]+?)%>/g;\n\n /** Used to match property names within property paths. */\n var reIsDeepProp = /\\.|\\[(?:[^[\\]]*|([\"'])(?:(?!\\1)[^\\\\]|\\\\.)*?\\1)\\]/,\n reIsPlainProp = /^\\w*$/,\n rePropName = /[^.[\\]]+|\\[(?:(-?\\d+(?:\\.\\d+)?)|([\"'])((?:(?!\\2)[^\\\\]|\\\\.)*?)\\2)\\]|(?=(?:\\.|\\[\\])(?:\\.|\\[\\]|$))/g;\n\n /**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\n var reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g,\n reHasRegExpChar = RegExp(reRegExpChar.source);\n\n /** Used to match leading whitespace. */\n var reTrimStart = /^\\s+/;\n\n /** Used to match a single whitespace character. */\n var reWhitespace = /\\s/;\n\n /** Used to match wrap detail comments. */\n var reWrapComment = /\\{(?:\\n\\/\\* \\[wrapped with .+\\] \\*\\/)?\\n?/,\n reWrapDetails = /\\{\\n\\/\\* \\[wrapped with (.+)\\] \\*/,\n reSplitDetails = /,? & /;\n\n /** Used to match words composed of alphanumeric characters. */\n var reAsciiWord = /[^\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\x7f]+/g;\n\n /**\n * Used to validate the `validate` option in `_.template` variable.\n *\n * Forbids characters which could potentially change the meaning of the function argument definition:\n * - \"(),\" (modification of function parameters)\n * - \"=\" (default value)\n * - \"[]{}\" (destructuring of function parameters)\n * - \"/\" (beginning of a comment)\n * - whitespace\n */\n var reForbiddenIdentifierChars = /[()=,{}\\[\\]\\/\\s]/;\n\n /** Used to match backslashes in property paths. */\n var reEscapeChar = /\\\\(\\\\)?/g;\n\n /**\n * Used to match\n * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).\n */\n var reEsTemplate = /\\$\\{([^\\\\}]*(?:\\\\.[^\\\\}]*)*)\\}/g;\n\n /** Used to match `RegExp` flags from their coerced string values. */\n var reFlags = /\\w*$/;\n\n /** Used to detect bad signed hexadecimal string values. */\n var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n /** Used to detect binary string values. */\n var reIsBinary = /^0b[01]+$/i;\n\n /** Used to detect host constructors (Safari). */\n var reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n /** Used to detect octal string values. */\n var reIsOctal = /^0o[0-7]+$/i;\n\n /** Used to detect unsigned integer values. */\n var reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n /** Used to match Latin Unicode letters (excluding mathematical operators). */\n var reLatin = /[\\xc0-\\xd6\\xd8-\\xf6\\xf8-\\xff\\u0100-\\u017f]/g;\n\n /** Used to ensure capturing order of template delimiters. */\n var reNoMatch = /($^)/;\n\n /** Used to match unescaped characters in compiled string literals. */\n var reUnescapedString = /['\\n\\r\\u2028\\u2029\\\\]/g;\n\n /** Used to compose unicode character classes. */\n var rsAstralRange = '\\\\ud800-\\\\udfff',\n rsComboMarksRange = '\\\\u0300-\\\\u036f',\n reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n rsDingbatRange = '\\\\u2700-\\\\u27bf',\n rsLowerRange = 'a-z\\\\xdf-\\\\xf6\\\\xf8-\\\\xff',\n rsMathOpRange = '\\\\xac\\\\xb1\\\\xd7\\\\xf7',\n rsNonCharRange = '\\\\x00-\\\\x2f\\\\x3a-\\\\x40\\\\x5b-\\\\x60\\\\x7b-\\\\xbf',\n rsPunctuationRange = '\\\\u2000-\\\\u206f',\n rsSpaceRange = ' \\\\t\\\\x0b\\\\f\\\\xa0\\\\ufeff\\\\n\\\\r\\\\u2028\\\\u2029\\\\u1680\\\\u180e\\\\u2000\\\\u2001\\\\u2002\\\\u2003\\\\u2004\\\\u2005\\\\u2006\\\\u2007\\\\u2008\\\\u2009\\\\u200a\\\\u202f\\\\u205f\\\\u3000',\n rsUpperRange = 'A-Z\\\\xc0-\\\\xd6\\\\xd8-\\\\xde',\n rsVarRange = '\\\\ufe0e\\\\ufe0f',\n rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;\n\n /** Used to compose unicode capture groups. */\n var rsApos = \"['\\u2019]\",\n rsAstral = '[' + rsAstralRange + ']',\n rsBreak = '[' + rsBreakRange + ']',\n rsCombo = '[' + rsComboRange + ']',\n rsDigits = '\\\\d+',\n rsDingbat = '[' + rsDingbatRange + ']',\n rsLower = '[' + rsLowerRange + ']',\n rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',\n rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]',\n rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',\n rsNonAstral = '[^' + rsAstralRange + ']',\n rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}',\n rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]',\n rsUpper = '[' + rsUpperRange + ']',\n rsZWJ = '\\\\u200d';\n\n /** Used to compose unicode regexes. */\n var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',\n rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',\n rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',\n rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',\n reOptMod = rsModifier + '?',\n rsOptVar = '[' + rsVarRange + ']?',\n rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',\n rsOrdLower = '\\\\d*(?:1st|2nd|3rd|(?![123])\\\\dth)(?=\\\\b|[A-Z_])',\n rsOrdUpper = '\\\\d*(?:1ST|2ND|3RD|(?![123])\\\\dTH)(?=\\\\b|[a-z_])',\n rsSeq = rsOptVar + reOptMod + rsOptJoin,\n rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,\n rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';\n\n /** Used to match apostrophes. */\n var reApos = RegExp(rsApos, 'g');\n\n /**\n * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and\n * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).\n */\n var reComboMark = RegExp(rsCombo, 'g');\n\n /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */\n var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');\n\n /** Used to match complex or compound words. */\n var reUnicodeWord = RegExp([\n rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',\n rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',\n rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,\n rsUpper + '+' + rsOptContrUpper,\n rsOrdUpper,\n rsOrdLower,\n rsDigits,\n rsEmoji\n ].join('|'), 'g');\n\n /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */\n var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');\n\n /** Used to detect strings that need a more robust regexp to match words. */\n var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;\n\n /** Used to assign default `context` object properties. */\n var contextProps = [\n 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',\n 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',\n 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',\n 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',\n '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'\n ];\n\n /** Used to make template sourceURLs easier to identify. */\n var templateCounter = -1;\n\n /** Used to identify `toStringTag` values of typed arrays. */\n var typedArrayTags = {};\n typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\n typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\n typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\n typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\n typedArrayTags[uint32Tag] = true;\n typedArrayTags[argsTag] = typedArrayTags[arrayTag] =\n typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\n typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\n typedArrayTags[errorTag] = typedArrayTags[funcTag] =\n typedArrayTags[mapTag] = typedArrayTags[numberTag] =\n typedArrayTags[objectTag] = typedArrayTags[regexpTag] =\n typedArrayTags[setTag] = typedArrayTags[stringTag] =\n typedArrayTags[weakMapTag] = false;\n\n /** Used to identify `toStringTag` values supported by `_.clone`. */\n var cloneableTags = {};\n cloneableTags[argsTag] = cloneableTags[arrayTag] =\n cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =\n cloneableTags[boolTag] = cloneableTags[dateTag] =\n cloneableTags[float32Tag] = cloneableTags[float64Tag] =\n cloneableTags[int8Tag] = cloneableTags[int16Tag] =\n cloneableTags[int32Tag] = cloneableTags[mapTag] =\n cloneableTags[numberTag] = cloneableTags[objectTag] =\n cloneableTags[regexpTag] = cloneableTags[setTag] =\n cloneableTags[stringTag] = cloneableTags[symbolTag] =\n cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =\n cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;\n cloneableTags[errorTag] = cloneableTags[funcTag] =\n cloneableTags[weakMapTag] = false;\n\n /** Used to map Latin Unicode letters to basic Latin letters. */\n var deburredLetters = {\n // Latin-1 Supplement block.\n '\\xc0': 'A', '\\xc1': 'A', '\\xc2': 'A', '\\xc3': 'A', '\\xc4': 'A', '\\xc5': 'A',\n '\\xe0': 'a', '\\xe1': 'a', '\\xe2': 'a', '\\xe3': 'a', '\\xe4': 'a', '\\xe5': 'a',\n '\\xc7': 'C', '\\xe7': 'c',\n '\\xd0': 'D', '\\xf0': 'd',\n '\\xc8': 'E', '\\xc9': 'E', '\\xca': 'E', '\\xcb': 'E',\n '\\xe8': 'e', '\\xe9': 'e', '\\xea': 'e', '\\xeb': 'e',\n '\\xcc': 'I', '\\xcd': 'I', '\\xce': 'I', '\\xcf': 'I',\n '\\xec': 'i', '\\xed': 'i', '\\xee': 'i', '\\xef': 'i',\n '\\xd1': 'N', '\\xf1': 'n',\n '\\xd2': 'O', '\\xd3': 'O', '\\xd4': 'O', '\\xd5': 'O', '\\xd6': 'O', '\\xd8': 'O',\n '\\xf2': 'o', '\\xf3': 'o', '\\xf4': 'o', '\\xf5': 'o', '\\xf6': 'o', '\\xf8': 'o',\n '\\xd9': 'U', '\\xda': 'U', '\\xdb': 'U', '\\xdc': 'U',\n '\\xf9': 'u', '\\xfa': 'u', '\\xfb': 'u', '\\xfc': 'u',\n '\\xdd': 'Y', '\\xfd': 'y', '\\xff': 'y',\n '\\xc6': 'Ae', '\\xe6': 'ae',\n '\\xde': 'Th', '\\xfe': 'th',\n '\\xdf': 'ss',\n // Latin Extended-A block.\n '\\u0100': 'A', '\\u0102': 'A', '\\u0104': 'A',\n '\\u0101': 'a', '\\u0103': 'a', '\\u0105': 'a',\n '\\u0106': 'C', '\\u0108': 'C', '\\u010a': 'C', '\\u010c': 'C',\n '\\u0107': 'c', '\\u0109': 'c', '\\u010b': 'c', '\\u010d': 'c',\n '\\u010e': 'D', '\\u0110': 'D', '\\u010f': 'd', '\\u0111': 'd',\n '\\u0112': 'E', '\\u0114': 'E', '\\u0116': 'E', '\\u0118': 'E', '\\u011a': 'E',\n '\\u0113': 'e', '\\u0115': 'e', '\\u0117': 'e', '\\u0119': 'e', '\\u011b': 'e',\n '\\u011c': 'G', '\\u011e': 'G', '\\u0120': 'G', '\\u0122': 'G',\n '\\u011d': 'g', '\\u011f': 'g', '\\u0121': 'g', '\\u0123': 'g',\n '\\u0124': 'H', '\\u0126': 'H', '\\u0125': 'h', '\\u0127': 'h',\n '\\u0128': 'I', '\\u012a': 'I', '\\u012c': 'I', '\\u012e': 'I', '\\u0130': 'I',\n '\\u0129': 'i', '\\u012b': 'i', '\\u012d': 'i', '\\u012f': 'i', '\\u0131': 'i',\n '\\u0134': 'J', '\\u0135': 'j',\n '\\u0136': 'K', '\\u0137': 'k', '\\u0138': 'k',\n '\\u0139': 'L', '\\u013b': 'L', '\\u013d': 'L', '\\u013f': 'L', '\\u0141': 'L',\n '\\u013a': 'l', '\\u013c': 'l', '\\u013e': 'l', '\\u0140': 'l', '\\u0142': 'l',\n '\\u0143': 'N', '\\u0145': 'N', '\\u0147': 'N', '\\u014a': 'N',\n '\\u0144': 'n', '\\u0146': 'n', '\\u0148': 'n', '\\u014b': 'n',\n '\\u014c': 'O', '\\u014e': 'O', '\\u0150': 'O',\n '\\u014d': 'o', '\\u014f': 'o', '\\u0151': 'o',\n '\\u0154': 'R', '\\u0156': 'R', '\\u0158': 'R',\n '\\u0155': 'r', '\\u0157': 'r', '\\u0159': 'r',\n '\\u015a': 'S', '\\u015c': 'S', '\\u015e': 'S', '\\u0160': 'S',\n '\\u015b': 's', '\\u015d': 's', '\\u015f': 's', '\\u0161': 's',\n '\\u0162': 'T', '\\u0164': 'T', '\\u0166': 'T',\n '\\u0163': 't', '\\u0165': 't', '\\u0167': 't',\n '\\u0168': 'U', '\\u016a': 'U', '\\u016c': 'U', '\\u016e': 'U', '\\u0170': 'U', '\\u0172': 'U',\n '\\u0169': 'u', '\\u016b': 'u', '\\u016d': 'u', '\\u016f': 'u', '\\u0171': 'u', '\\u0173': 'u',\n '\\u0174': 'W', '\\u0175': 'w',\n '\\u0176': 'Y', '\\u0177': 'y', '\\u0178': 'Y',\n '\\u0179': 'Z', '\\u017b': 'Z', '\\u017d': 'Z',\n '\\u017a': 'z', '\\u017c': 'z', '\\u017e': 'z',\n '\\u0132': 'IJ', '\\u0133': 'ij',\n '\\u0152': 'Oe', '\\u0153': 'oe',\n '\\u0149': \"'n\", '\\u017f': 's'\n };\n\n /** Used to map characters to HTML entities. */\n var htmlEscapes = {\n '&': '&',\n '<': '<',\n '>': '>',\n '\"': '"',\n \"'\": '''\n };\n\n /** Used to map HTML entities to characters. */\n var htmlUnescapes = {\n '&': '&',\n '<': '<',\n '>': '>',\n '"': '\"',\n ''': \"'\"\n };\n\n /** Used to escape characters for inclusion in compiled string literals. */\n var stringEscapes = {\n '\\\\': '\\\\',\n \"'\": \"'\",\n '\\n': 'n',\n '\\r': 'r',\n '\\u2028': 'u2028',\n '\\u2029': 'u2029'\n };\n\n /** Built-in method references without a dependency on `root`. */\n var freeParseFloat = parseFloat,\n freeParseInt = parseInt;\n\n /** Detect free variable `global` from Node.js. */\n var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n /** Detect free variable `self`. */\n var freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n /** Used as a reference to the global object. */\n var root = freeGlobal || freeSelf || Function('return this')();\n\n /** Detect free variable `exports`. */\n var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n /** Detect free variable `module`. */\n var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n /** Detect the popular CommonJS extension `module.exports`. */\n var moduleExports = freeModule && freeModule.exports === freeExports;\n\n /** Detect free variable `process` from Node.js. */\n var freeProcess = moduleExports && freeGlobal.process;\n\n /** Used to access faster Node.js helpers. */\n var nodeUtil = (function() {\n try {\n // Use `util.types` for Node.js 10+.\n var types = freeModule && freeModule.require && freeModule.require('util').types;\n\n if (types) {\n return types;\n }\n\n // Legacy `process.binding('util')` for Node.js < 10.\n return freeProcess && freeProcess.binding && freeProcess.binding('util');\n } catch (e) {}\n }());\n\n /* Node.js helper references. */\n var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,\n nodeIsDate = nodeUtil && nodeUtil.isDate,\n nodeIsMap = nodeUtil && nodeUtil.isMap,\n nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,\n nodeIsSet = nodeUtil && nodeUtil.isSet,\n nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n /*--------------------------------------------------------------------------*/\n\n /**\n * A faster alternative to `Function#apply`, this function invokes `func`\n * with the `this` binding of `thisArg` and the arguments of `args`.\n *\n * @private\n * @param {Function} func The function to invoke.\n * @param {*} thisArg The `this` binding of `func`.\n * @param {Array} args The arguments to invoke `func` with.\n * @returns {*} Returns the result of `func`.\n */\n function apply(func, thisArg, args) {\n switch (args.length) {\n case 0: return func.call(thisArg);\n case 1: return func.call(thisArg, args[0]);\n case 2: return func.call(thisArg, args[0], args[1]);\n case 3: return func.call(thisArg, args[0], args[1], args[2]);\n }\n return func.apply(thisArg, args);\n }\n\n /**\n * A specialized version of `baseAggregator` for arrays.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} setter The function to set `accumulator` values.\n * @param {Function} iteratee The iteratee to transform keys.\n * @param {Object} accumulator The initial aggregated object.\n * @returns {Function} Returns `accumulator`.\n */\n function arrayAggregator(array, setter, iteratee, accumulator) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n var value = array[index];\n setter(accumulator, value, iteratee(value), array);\n }\n return accumulator;\n }\n\n /**\n * A specialized version of `_.forEach` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\n function arrayEach(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (iteratee(array[index], index, array) === false) {\n break;\n }\n }\n return array;\n }\n\n /**\n * A specialized version of `_.forEachRight` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\n function arrayEachRight(array, iteratee) {\n var length = array == null ? 0 : array.length;\n\n while (length--) {\n if (iteratee(array[length], length, array) === false) {\n break;\n }\n }\n return array;\n }\n\n /**\n * A specialized version of `_.every` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if all elements pass the predicate check,\n * else `false`.\n */\n function arrayEvery(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (!predicate(array[index], index, array)) {\n return false;\n }\n }\n return true;\n }\n\n /**\n * A specialized version of `_.filter` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\n function arrayFilter(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (predicate(value, index, array)) {\n result[resIndex++] = value;\n }\n }\n return result;\n }\n\n /**\n * A specialized version of `_.includes` for arrays without support for\n * specifying an index to search from.\n *\n * @private\n * @param {Array} [array] The array to inspect.\n * @param {*} target The value to search for.\n * @returns {boolean} Returns `true` if `target` is found, else `false`.\n */\n function arrayIncludes(array, value) {\n var length = array == null ? 0 : array.length;\n return !!length && baseIndexOf(array, value, 0) > -1;\n }\n\n /**\n * This function is like `arrayIncludes` except that it accepts a comparator.\n *\n * @private\n * @param {Array} [array] The array to inspect.\n * @param {*} target The value to search for.\n * @param {Function} comparator The comparator invoked per element.\n * @returns {boolean} Returns `true` if `target` is found, else `false`.\n */\n function arrayIncludesWith(array, value, comparator) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (comparator(value, array[index])) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\n function arrayMap(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length,\n result = Array(length);\n\n while (++index < length) {\n result[index] = iteratee(array[index], index, array);\n }\n return result;\n }\n\n /**\n * Appends the elements of `values` to `array`.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to append.\n * @returns {Array} Returns `array`.\n */\n function arrayPush(array, values) {\n var index = -1,\n length = values.length,\n offset = array.length;\n\n while (++index < length) {\n array[offset + index] = values[index];\n }\n return array;\n }\n\n /**\n * A specialized version of `_.reduce` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {*} [accumulator] The initial value.\n * @param {boolean} [initAccum] Specify using the first element of `array` as\n * the initial value.\n * @returns {*} Returns the accumulated value.\n */\n function arrayReduce(array, iteratee, accumulator, initAccum) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n if (initAccum && length) {\n accumulator = array[++index];\n }\n while (++index < length) {\n accumulator = iteratee(accumulator, array[index], index, array);\n }\n return accumulator;\n }\n\n /**\n * A specialized version of `_.reduceRight` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {*} [accumulator] The initial value.\n * @param {boolean} [initAccum] Specify using the last element of `array` as\n * the initial value.\n * @returns {*} Returns the accumulated value.\n */\n function arrayReduceRight(array, iteratee, accumulator, initAccum) {\n var length = array == null ? 0 : array.length;\n if (initAccum && length) {\n accumulator = array[--length];\n }\n while (length--) {\n accumulator = iteratee(accumulator, array[length], length, array);\n }\n return accumulator;\n }\n\n /**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\n function arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * Gets the size of an ASCII `string`.\n *\n * @private\n * @param {string} string The string inspect.\n * @returns {number} Returns the string size.\n */\n var asciiSize = baseProperty('length');\n\n /**\n * Converts an ASCII `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\n function asciiToArray(string) {\n return string.split('');\n }\n\n /**\n * Splits an ASCII `string` into an array of its words.\n *\n * @private\n * @param {string} The string to inspect.\n * @returns {Array} Returns the words of `string`.\n */\n function asciiWords(string) {\n return string.match(reAsciiWord) || [];\n }\n\n /**\n * The base implementation of methods like `_.findKey` and `_.findLastKey`,\n * without support for iteratee shorthands, which iterates over `collection`\n * using `eachFunc`.\n *\n * @private\n * @param {Array|Object} collection The collection to inspect.\n * @param {Function} predicate The function invoked per iteration.\n * @param {Function} eachFunc The function to iterate over `collection`.\n * @returns {*} Returns the found element or its key, else `undefined`.\n */\n function baseFindKey(collection, predicate, eachFunc) {\n var result;\n eachFunc(collection, function(value, key, collection) {\n if (predicate(value, key, collection)) {\n result = key;\n return false;\n }\n });\n return result;\n }\n\n /**\n * The base implementation of `_.findIndex` and `_.findLastIndex` without\n * support for iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {Function} predicate The function invoked per iteration.\n * @param {number} fromIndex The index to search from.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function baseFindIndex(array, predicate, fromIndex, fromRight) {\n var length = array.length,\n index = fromIndex + (fromRight ? 1 : -1);\n\n while ((fromRight ? index-- : ++index < length)) {\n if (predicate(array[index], index, array)) {\n return index;\n }\n }\n return -1;\n }\n\n /**\n * The base implementation of `_.indexOf` without `fromIndex` bounds checks.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function baseIndexOf(array, value, fromIndex) {\n return value === value\n ? strictIndexOf(array, value, fromIndex)\n : baseFindIndex(array, baseIsNaN, fromIndex);\n }\n\n /**\n * This function is like `baseIndexOf` except that it accepts a comparator.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @param {Function} comparator The comparator invoked per element.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function baseIndexOfWith(array, value, fromIndex, comparator) {\n var index = fromIndex - 1,\n length = array.length;\n\n while (++index < length) {\n if (comparator(array[index], value)) {\n return index;\n }\n }\n return -1;\n }\n\n /**\n * The base implementation of `_.isNaN` without support for number objects.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n */\n function baseIsNaN(value) {\n return value !== value;\n }\n\n /**\n * The base implementation of `_.mean` and `_.meanBy` without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {number} Returns the mean.\n */\n function baseMean(array, iteratee) {\n var length = array == null ? 0 : array.length;\n return length ? (baseSum(array, iteratee) / length) : NAN;\n }\n\n /**\n * The base implementation of `_.property` without support for deep paths.\n *\n * @private\n * @param {string} key The key of the property to get.\n * @returns {Function} Returns the new accessor function.\n */\n function baseProperty(key) {\n return function(object) {\n return object == null ? undefined : object[key];\n };\n }\n\n /**\n * The base implementation of `_.propertyOf` without support for deep paths.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Function} Returns the new accessor function.\n */\n function basePropertyOf(object) {\n return function(key) {\n return object == null ? undefined : object[key];\n };\n }\n\n /**\n * The base implementation of `_.reduce` and `_.reduceRight`, without support\n * for iteratee shorthands, which iterates over `collection` using `eachFunc`.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {*} accumulator The initial value.\n * @param {boolean} initAccum Specify using the first or last element of\n * `collection` as the initial value.\n * @param {Function} eachFunc The function to iterate over `collection`.\n * @returns {*} Returns the accumulated value.\n */\n function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {\n eachFunc(collection, function(value, index, collection) {\n accumulator = initAccum\n ? (initAccum = false, value)\n : iteratee(accumulator, value, index, collection);\n });\n return accumulator;\n }\n\n /**\n * The base implementation of `_.sortBy` which uses `comparer` to define the\n * sort order of `array` and replaces criteria objects with their corresponding\n * values.\n *\n * @private\n * @param {Array} array The array to sort.\n * @param {Function} comparer The function to define sort order.\n * @returns {Array} Returns `array`.\n */\n function baseSortBy(array, comparer) {\n var length = array.length;\n\n array.sort(comparer);\n while (length--) {\n array[length] = array[length].value;\n }\n return array;\n }\n\n /**\n * The base implementation of `_.sum` and `_.sumBy` without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {number} Returns the sum.\n */\n function baseSum(array, iteratee) {\n var result,\n index = -1,\n length = array.length;\n\n while (++index < length) {\n var current = iteratee(array[index]);\n if (current !== undefined) {\n result = result === undefined ? current : (result + current);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\n function baseTimes(n, iteratee) {\n var index = -1,\n result = Array(n);\n\n while (++index < n) {\n result[index] = iteratee(index);\n }\n return result;\n }\n\n /**\n * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array\n * of key-value pairs for `object` corresponding to the property names of `props`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array} props The property names to get values for.\n * @returns {Object} Returns the key-value pairs.\n */\n function baseToPairs(object, props) {\n return arrayMap(props, function(key) {\n return [key, object[key]];\n });\n }\n\n /**\n * The base implementation of `_.trim`.\n *\n * @private\n * @param {string} string The string to trim.\n * @returns {string} Returns the trimmed string.\n */\n function baseTrim(string) {\n return string\n ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '')\n : string;\n }\n\n /**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\n function baseUnary(func) {\n return function(value) {\n return func(value);\n };\n }\n\n /**\n * The base implementation of `_.values` and `_.valuesIn` which creates an\n * array of `object` property values corresponding to the property names\n * of `props`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array} props The property names to get values for.\n * @returns {Object} Returns the array of property values.\n */\n function baseValues(object, props) {\n return arrayMap(props, function(key) {\n return object[key];\n });\n }\n\n /**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\n function cacheHas(cache, key) {\n return cache.has(key);\n }\n\n /**\n * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol\n * that is not found in the character symbols.\n *\n * @private\n * @param {Array} strSymbols The string symbols to inspect.\n * @param {Array} chrSymbols The character symbols to find.\n * @returns {number} Returns the index of the first unmatched string symbol.\n */\n function charsStartIndex(strSymbols, chrSymbols) {\n var index = -1,\n length = strSymbols.length;\n\n while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n return index;\n }\n\n /**\n * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol\n * that is not found in the character symbols.\n *\n * @private\n * @param {Array} strSymbols The string symbols to inspect.\n * @param {Array} chrSymbols The character symbols to find.\n * @returns {number} Returns the index of the last unmatched string symbol.\n */\n function charsEndIndex(strSymbols, chrSymbols) {\n var index = strSymbols.length;\n\n while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n return index;\n }\n\n /**\n * Gets the number of `placeholder` occurrences in `array`.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} placeholder The placeholder to search for.\n * @returns {number} Returns the placeholder count.\n */\n function countHolders(array, placeholder) {\n var length = array.length,\n result = 0;\n\n while (length--) {\n if (array[length] === placeholder) {\n ++result;\n }\n }\n return result;\n }\n\n /**\n * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A\n * letters to basic Latin letters.\n *\n * @private\n * @param {string} letter The matched letter to deburr.\n * @returns {string} Returns the deburred letter.\n */\n var deburrLetter = basePropertyOf(deburredLetters);\n\n /**\n * Used by `_.escape` to convert characters to HTML entities.\n *\n * @private\n * @param {string} chr The matched character to escape.\n * @returns {string} Returns the escaped character.\n */\n var escapeHtmlChar = basePropertyOf(htmlEscapes);\n\n /**\n * Used by `_.template` to escape characters for inclusion in compiled string literals.\n *\n * @private\n * @param {string} chr The matched character to escape.\n * @returns {string} Returns the escaped character.\n */\n function escapeStringChar(chr) {\n return '\\\\' + stringEscapes[chr];\n }\n\n /**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\n function getValue(object, key) {\n return object == null ? undefined : object[key];\n }\n\n /**\n * Checks if `string` contains Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a symbol is found, else `false`.\n */\n function hasUnicode(string) {\n return reHasUnicode.test(string);\n }\n\n /**\n * Checks if `string` contains a word composed of Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a word is found, else `false`.\n */\n function hasUnicodeWord(string) {\n return reHasUnicodeWord.test(string);\n }\n\n /**\n * Converts `iterator` to an array.\n *\n * @private\n * @param {Object} iterator The iterator to convert.\n * @returns {Array} Returns the converted array.\n */\n function iteratorToArray(iterator) {\n var data,\n result = [];\n\n while (!(data = iterator.next()).done) {\n result.push(data.value);\n }\n return result;\n }\n\n /**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\n function mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n }\n\n /**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\n function overArg(func, transform) {\n return function(arg) {\n return func(transform(arg));\n };\n }\n\n /**\n * Replaces all `placeholder` elements in `array` with an internal placeholder\n * and returns an array of their indexes.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {*} placeholder The placeholder to replace.\n * @returns {Array} Returns the new array of placeholder indexes.\n */\n function replaceHolders(array, placeholder) {\n var index = -1,\n length = array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (value === placeholder || value === PLACEHOLDER) {\n array[index] = PLACEHOLDER;\n result[resIndex++] = index;\n }\n }\n return result;\n }\n\n /**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\n function setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n }\n\n /**\n * Converts `set` to its value-value pairs.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the value-value pairs.\n */\n function setToPairs(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = [value, value];\n });\n return result;\n }\n\n /**\n * A specialized version of `_.indexOf` which performs strict equality\n * comparisons of values, i.e. `===`.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function strictIndexOf(array, value, fromIndex) {\n var index = fromIndex - 1,\n length = array.length;\n\n while (++index < length) {\n if (array[index] === value) {\n return index;\n }\n }\n return -1;\n }\n\n /**\n * A specialized version of `_.lastIndexOf` which performs strict equality\n * comparisons of values, i.e. `===`.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function strictLastIndexOf(array, value, fromIndex) {\n var index = fromIndex + 1;\n while (index--) {\n if (array[index] === value) {\n return index;\n }\n }\n return index;\n }\n\n /**\n * Gets the number of symbols in `string`.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {number} Returns the string size.\n */\n function stringSize(string) {\n return hasUnicode(string)\n ? unicodeSize(string)\n : asciiSize(string);\n }\n\n /**\n * Converts `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\n function stringToArray(string) {\n return hasUnicode(string)\n ? unicodeToArray(string)\n : asciiToArray(string);\n }\n\n /**\n * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace\n * character of `string`.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {number} Returns the index of the last non-whitespace character.\n */\n function trimmedEndIndex(string) {\n var index = string.length;\n\n while (index-- && reWhitespace.test(string.charAt(index))) {}\n return index;\n }\n\n /**\n * Used by `_.unescape` to convert HTML entities to characters.\n *\n * @private\n * @param {string} chr The matched character to unescape.\n * @returns {string} Returns the unescaped character.\n */\n var unescapeHtmlChar = basePropertyOf(htmlUnescapes);\n\n /**\n * Gets the size of a Unicode `string`.\n *\n * @private\n * @param {string} string The string inspect.\n * @returns {number} Returns the string size.\n */\n function unicodeSize(string) {\n var result = reUnicode.lastIndex = 0;\n while (reUnicode.test(string)) {\n ++result;\n }\n return result;\n }\n\n /**\n * Converts a Unicode `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\n function unicodeToArray(string) {\n return string.match(reUnicode) || [];\n }\n\n /**\n * Splits a Unicode `string` into an array of its words.\n *\n * @private\n * @param {string} The string to inspect.\n * @returns {Array} Returns the words of `string`.\n */\n function unicodeWords(string) {\n return string.match(reUnicodeWord) || [];\n }\n\n /*--------------------------------------------------------------------------*/\n\n /**\n * Create a new pristine `lodash` function using the `context` object.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category Util\n * @param {Object} [context=root] The context object.\n * @returns {Function} Returns a new `lodash` function.\n * @example\n *\n * _.mixin({ 'foo': _.constant('foo') });\n *\n * var lodash = _.runInContext();\n * lodash.mixin({ 'bar': lodash.constant('bar') });\n *\n * _.isFunction(_.foo);\n * // => true\n * _.isFunction(_.bar);\n * // => false\n *\n * lodash.isFunction(lodash.foo);\n * // => false\n * lodash.isFunction(lodash.bar);\n * // => true\n *\n * // Create a suped-up `defer` in Node.js.\n * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;\n */\n var runInContext = (function runInContext(context) {\n context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));\n\n /** Built-in constructor references. */\n var Array = context.Array,\n Date = context.Date,\n Error = context.Error,\n Function = context.Function,\n Math = context.Math,\n Object = context.Object,\n RegExp = context.RegExp,\n String = context.String,\n TypeError = context.TypeError;\n\n /** Used for built-in method references. */\n var arrayProto = Array.prototype,\n funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n /** Used to detect overreaching core-js shims. */\n var coreJsData = context['__core-js_shared__'];\n\n /** Used to resolve the decompiled source of functions. */\n var funcToString = funcProto.toString;\n\n /** Used to check objects for own properties. */\n var hasOwnProperty = objectProto.hasOwnProperty;\n\n /** Used to generate unique IDs. */\n var idCounter = 0;\n\n /** Used to detect methods masquerading as native. */\n var maskSrcKey = (function() {\n var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n return uid ? ('Symbol(src)_1.' + uid) : '';\n }());\n\n /**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\n var nativeObjectToString = objectProto.toString;\n\n /** Used to infer the `Object` constructor. */\n var objectCtorString = funcToString.call(Object);\n\n /** Used to restore the original `_` reference in `_.noConflict`. */\n var oldDash = root._;\n\n /** Used to detect if a method is native. */\n var reIsNative = RegExp('^' +\n funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n );\n\n /** Built-in value references. */\n var Buffer = moduleExports ? context.Buffer : undefined,\n Symbol = context.Symbol,\n Uint8Array = context.Uint8Array,\n allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,\n getPrototype = overArg(Object.getPrototypeOf, Object),\n objectCreate = Object.create,\n propertyIsEnumerable = objectProto.propertyIsEnumerable,\n splice = arrayProto.splice,\n spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,\n symIterator = Symbol ? Symbol.iterator : undefined,\n symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n var defineProperty = (function() {\n try {\n var func = getNative(Object, 'defineProperty');\n func({}, '', {});\n return func;\n } catch (e) {}\n }());\n\n /** Mocked built-ins. */\n var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,\n ctxNow = Date && Date.now !== root.Date.now && Date.now,\n ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;\n\n /* Built-in method references for those with the same name as other `lodash` methods. */\n var nativeCeil = Math.ceil,\n nativeFloor = Math.floor,\n nativeGetSymbols = Object.getOwnPropertySymbols,\n nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,\n nativeIsFinite = context.isFinite,\n nativeJoin = arrayProto.join,\n nativeKeys = overArg(Object.keys, Object),\n nativeMax = Math.max,\n nativeMin = Math.min,\n nativeNow = Date.now,\n nativeParseInt = context.parseInt,\n nativeRandom = Math.random,\n nativeReverse = arrayProto.reverse;\n\n /* Built-in method references that are verified to be native. */\n var DataView = getNative(context, 'DataView'),\n Map = getNative(context, 'Map'),\n Promise = getNative(context, 'Promise'),\n Set = getNative(context, 'Set'),\n WeakMap = getNative(context, 'WeakMap'),\n nativeCreate = getNative(Object, 'create');\n\n /** Used to store function metadata. */\n var metaMap = WeakMap && new WeakMap;\n\n /** Used to lookup unminified function names. */\n var realNames = {};\n\n /** Used to detect maps, sets, and weakmaps. */\n var dataViewCtorString = toSource(DataView),\n mapCtorString = toSource(Map),\n promiseCtorString = toSource(Promise),\n setCtorString = toSource(Set),\n weakMapCtorString = toSource(WeakMap);\n\n /** Used to convert symbols to primitives and strings. */\n var symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,\n symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a `lodash` object which wraps `value` to enable implicit method\n * chain sequences. Methods that operate on and return arrays, collections,\n * and functions can be chained together. Methods that retrieve a single value\n * or may return a primitive value will automatically end the chain sequence\n * and return the unwrapped value. Otherwise, the value must be unwrapped\n * with `_#value`.\n *\n * Explicit chain sequences, which must be unwrapped with `_#value`, may be\n * enabled using `_.chain`.\n *\n * The execution of chained methods is lazy, that is, it's deferred until\n * `_#value` is implicitly or explicitly called.\n *\n * Lazy evaluation allows several methods to support shortcut fusion.\n * Shortcut fusion is an optimization to merge iteratee calls; this avoids\n * the creation of intermediate arrays and can greatly reduce the number of\n * iteratee executions. Sections of a chain sequence qualify for shortcut\n * fusion if the section is applied to an array and iteratees accept only\n * one argument. The heuristic for whether a section qualifies for shortcut\n * fusion is subject to change.\n *\n * Chaining is supported in custom builds as long as the `_#value` method is\n * directly or indirectly included in the build.\n *\n * In addition to lodash methods, wrappers have `Array` and `String` methods.\n *\n * The wrapper `Array` methods are:\n * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`\n *\n * The wrapper `String` methods are:\n * `replace` and `split`\n *\n * The wrapper methods that support shortcut fusion are:\n * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,\n * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,\n * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`\n *\n * The chainable wrapper methods are:\n * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,\n * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,\n * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,\n * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,\n * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,\n * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,\n * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,\n * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,\n * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,\n * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,\n * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,\n * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,\n * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,\n * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,\n * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,\n * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,\n * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,\n * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,\n * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,\n * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,\n * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,\n * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,\n * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,\n * `zipObject`, `zipObjectDeep`, and `zipWith`\n *\n * The wrapper methods that are **not** chainable by default are:\n * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,\n * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,\n * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,\n * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,\n * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,\n * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,\n * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,\n * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,\n * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,\n * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,\n * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,\n * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,\n * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,\n * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,\n * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,\n * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,\n * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,\n * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,\n * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,\n * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,\n * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,\n * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,\n * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,\n * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,\n * `upperFirst`, `value`, and `words`\n *\n * @name _\n * @constructor\n * @category Seq\n * @param {*} value The value to wrap in a `lodash` instance.\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * function square(n) {\n * return n * n;\n * }\n *\n * var wrapped = _([1, 2, 3]);\n *\n * // Returns an unwrapped value.\n * wrapped.reduce(_.add);\n * // => 6\n *\n * // Returns a wrapped value.\n * var squares = wrapped.map(square);\n *\n * _.isArray(squares);\n * // => false\n *\n * _.isArray(squares.value());\n * // => true\n */\n function lodash(value) {\n if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {\n if (value instanceof LodashWrapper) {\n return value;\n }\n if (hasOwnProperty.call(value, '__wrapped__')) {\n return wrapperClone(value);\n }\n }\n return new LodashWrapper(value);\n }\n\n /**\n * The base implementation of `_.create` without support for assigning\n * properties to the created object.\n *\n * @private\n * @param {Object} proto The object to inherit from.\n * @returns {Object} Returns the new object.\n */\n var baseCreate = (function() {\n function object() {}\n return function(proto) {\n if (!isObject(proto)) {\n return {};\n }\n if (objectCreate) {\n return objectCreate(proto);\n }\n object.prototype = proto;\n var result = new object;\n object.prototype = undefined;\n return result;\n };\n }());\n\n /**\n * The function whose prototype chain sequence wrappers inherit from.\n *\n * @private\n */\n function baseLodash() {\n // No operation performed.\n }\n\n /**\n * The base constructor for creating `lodash` wrapper objects.\n *\n * @private\n * @param {*} value The value to wrap.\n * @param {boolean} [chainAll] Enable explicit method chain sequences.\n */\n function LodashWrapper(value, chainAll) {\n this.__wrapped__ = value;\n this.__actions__ = [];\n this.__chain__ = !!chainAll;\n this.__index__ = 0;\n this.__values__ = undefined;\n }\n\n /**\n * By default, the template delimiters used by lodash are like those in\n * embedded Ruby (ERB) as well as ES2015 template strings. Change the\n * following template settings to use alternative delimiters.\n *\n * @static\n * @memberOf _\n * @type {Object}\n */\n lodash.templateSettings = {\n\n /**\n * Used to detect `data` property values to be HTML-escaped.\n *\n * @memberOf _.templateSettings\n * @type {RegExp}\n */\n 'escape': reEscape,\n\n /**\n * Used to detect code to be evaluated.\n *\n * @memberOf _.templateSettings\n * @type {RegExp}\n */\n 'evaluate': reEvaluate,\n\n /**\n * Used to detect `data` property values to inject.\n *\n * @memberOf _.templateSettings\n * @type {RegExp}\n */\n 'interpolate': reInterpolate,\n\n /**\n * Used to reference the data object in the template text.\n *\n * @memberOf _.templateSettings\n * @type {string}\n */\n 'variable': '',\n\n /**\n * Used to import variables into the compiled template.\n *\n * @memberOf _.templateSettings\n * @type {Object}\n */\n 'imports': {\n\n /**\n * A reference to the `lodash` function.\n *\n * @memberOf _.templateSettings.imports\n * @type {Function}\n */\n '_': lodash\n }\n };\n\n // Ensure wrappers are instances of `baseLodash`.\n lodash.prototype = baseLodash.prototype;\n lodash.prototype.constructor = lodash;\n\n LodashWrapper.prototype = baseCreate(baseLodash.prototype);\n LodashWrapper.prototype.constructor = LodashWrapper;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.\n *\n * @private\n * @constructor\n * @param {*} value The value to wrap.\n */\n function LazyWrapper(value) {\n this.__wrapped__ = value;\n this.__actions__ = [];\n this.__dir__ = 1;\n this.__filtered__ = false;\n this.__iteratees__ = [];\n this.__takeCount__ = MAX_ARRAY_LENGTH;\n this.__views__ = [];\n }\n\n /**\n * Creates a clone of the lazy wrapper object.\n *\n * @private\n * @name clone\n * @memberOf LazyWrapper\n * @returns {Object} Returns the cloned `LazyWrapper` object.\n */\n function lazyClone() {\n var result = new LazyWrapper(this.__wrapped__);\n result.__actions__ = copyArray(this.__actions__);\n result.__dir__ = this.__dir__;\n result.__filtered__ = this.__filtered__;\n result.__iteratees__ = copyArray(this.__iteratees__);\n result.__takeCount__ = this.__takeCount__;\n result.__views__ = copyArray(this.__views__);\n return result;\n }\n\n /**\n * Reverses the direction of lazy iteration.\n *\n * @private\n * @name reverse\n * @memberOf LazyWrapper\n * @returns {Object} Returns the new reversed `LazyWrapper` object.\n */\n function lazyReverse() {\n if (this.__filtered__) {\n var result = new LazyWrapper(this);\n result.__dir__ = -1;\n result.__filtered__ = true;\n } else {\n result = this.clone();\n result.__dir__ *= -1;\n }\n return result;\n }\n\n /**\n * Extracts the unwrapped value from its lazy wrapper.\n *\n * @private\n * @name value\n * @memberOf LazyWrapper\n * @returns {*} Returns the unwrapped value.\n */\n function lazyValue() {\n var array = this.__wrapped__.value(),\n dir = this.__dir__,\n isArr = isArray(array),\n isRight = dir < 0,\n arrLength = isArr ? array.length : 0,\n view = getView(0, arrLength, this.__views__),\n start = view.start,\n end = view.end,\n length = end - start,\n index = isRight ? end : (start - 1),\n iteratees = this.__iteratees__,\n iterLength = iteratees.length,\n resIndex = 0,\n takeCount = nativeMin(length, this.__takeCount__);\n\n if (!isArr || (!isRight && arrLength == length && takeCount == length)) {\n return baseWrapperValue(array, this.__actions__);\n }\n var result = [];\n\n outer:\n while (length-- && resIndex < takeCount) {\n index += dir;\n\n var iterIndex = -1,\n value = array[index];\n\n while (++iterIndex < iterLength) {\n var data = iteratees[iterIndex],\n iteratee = data.iteratee,\n type = data.type,\n computed = iteratee(value);\n\n if (type == LAZY_MAP_FLAG) {\n value = computed;\n } else if (!computed) {\n if (type == LAZY_FILTER_FLAG) {\n continue outer;\n } else {\n break outer;\n }\n }\n }\n result[resIndex++] = value;\n }\n return result;\n }\n\n // Ensure `LazyWrapper` is an instance of `baseLodash`.\n LazyWrapper.prototype = baseCreate(baseLodash.prototype);\n LazyWrapper.prototype.constructor = LazyWrapper;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\n function Hash(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n }\n\n /**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\n function hashClear() {\n this.__data__ = nativeCreate ? nativeCreate(null) : {};\n this.size = 0;\n }\n\n /**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\n function hashDelete(key) {\n var result = this.has(key) && delete this.__data__[key];\n this.size -= result ? 1 : 0;\n return result;\n }\n\n /**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\n function hashGet(key) {\n var data = this.__data__;\n if (nativeCreate) {\n var result = data[key];\n return result === HASH_UNDEFINED ? undefined : result;\n }\n return hasOwnProperty.call(data, key) ? data[key] : undefined;\n }\n\n /**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\n function hashHas(key) {\n var data = this.__data__;\n return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n }\n\n /**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\n function hashSet(key, value) {\n var data = this.__data__;\n this.size += this.has(key) ? 0 : 1;\n data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n return this;\n }\n\n // Add methods to `Hash`.\n Hash.prototype.clear = hashClear;\n Hash.prototype['delete'] = hashDelete;\n Hash.prototype.get = hashGet;\n Hash.prototype.has = hashHas;\n Hash.prototype.set = hashSet;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\n function ListCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n }\n\n /**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\n function listCacheClear() {\n this.__data__ = [];\n this.size = 0;\n }\n\n /**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\n function listCacheDelete(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n return false;\n }\n var lastIndex = data.length - 1;\n if (index == lastIndex) {\n data.pop();\n } else {\n splice.call(data, index, 1);\n }\n --this.size;\n return true;\n }\n\n /**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\n function listCacheGet(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n return index < 0 ? undefined : data[index][1];\n }\n\n /**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\n function listCacheHas(key) {\n return assocIndexOf(this.__data__, key) > -1;\n }\n\n /**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\n function listCacheSet(key, value) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n ++this.size;\n data.push([key, value]);\n } else {\n data[index][1] = value;\n }\n return this;\n }\n\n // Add methods to `ListCache`.\n ListCache.prototype.clear = listCacheClear;\n ListCache.prototype['delete'] = listCacheDelete;\n ListCache.prototype.get = listCacheGet;\n ListCache.prototype.has = listCacheHas;\n ListCache.prototype.set = listCacheSet;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\n function MapCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n }\n\n /**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\n function mapCacheClear() {\n this.size = 0;\n this.__data__ = {\n 'hash': new Hash,\n 'map': new (Map || ListCache),\n 'string': new Hash\n };\n }\n\n /**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\n function mapCacheDelete(key) {\n var result = getMapData(this, key)['delete'](key);\n this.size -= result ? 1 : 0;\n return result;\n }\n\n /**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\n function mapCacheGet(key) {\n return getMapData(this, key).get(key);\n }\n\n /**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\n function mapCacheHas(key) {\n return getMapData(this, key).has(key);\n }\n\n /**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\n function mapCacheSet(key, value) {\n var data = getMapData(this, key),\n size = data.size;\n\n data.set(key, value);\n this.size += data.size == size ? 0 : 1;\n return this;\n }\n\n // Add methods to `MapCache`.\n MapCache.prototype.clear = mapCacheClear;\n MapCache.prototype['delete'] = mapCacheDelete;\n MapCache.prototype.get = mapCacheGet;\n MapCache.prototype.has = mapCacheHas;\n MapCache.prototype.set = mapCacheSet;\n\n /*------------------------------------------------------------------------*/\n\n /**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\n function SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n }\n\n /**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\n function setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n }\n\n /**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\n function setCacheHas(value) {\n return this.__data__.has(value);\n }\n\n // Add methods to `SetCache`.\n SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\n SetCache.prototype.has = setCacheHas;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a stack cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\n function Stack(entries) {\n var data = this.__data__ = new ListCache(entries);\n this.size = data.size;\n }\n\n /**\n * Removes all key-value entries from the stack.\n *\n * @private\n * @name clear\n * @memberOf Stack\n */\n function stackClear() {\n this.__data__ = new ListCache;\n this.size = 0;\n }\n\n /**\n * Removes `key` and its value from the stack.\n *\n * @private\n * @name delete\n * @memberOf Stack\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\n function stackDelete(key) {\n var data = this.__data__,\n result = data['delete'](key);\n\n this.size = data.size;\n return result;\n }\n\n /**\n * Gets the stack value for `key`.\n *\n * @private\n * @name get\n * @memberOf Stack\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\n function stackGet(key) {\n return this.__data__.get(key);\n }\n\n /**\n * Checks if a stack value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Stack\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\n function stackHas(key) {\n return this.__data__.has(key);\n }\n\n /**\n * Sets the stack `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Stack\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the stack cache instance.\n */\n function stackSet(key, value) {\n var data = this.__data__;\n if (data instanceof ListCache) {\n var pairs = data.__data__;\n if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n pairs.push([key, value]);\n this.size = ++data.size;\n return this;\n }\n data = this.__data__ = new MapCache(pairs);\n }\n data.set(key, value);\n this.size = data.size;\n return this;\n }\n\n // Add methods to `Stack`.\n Stack.prototype.clear = stackClear;\n Stack.prototype['delete'] = stackDelete;\n Stack.prototype.get = stackGet;\n Stack.prototype.has = stackHas;\n Stack.prototype.set = stackSet;\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\n function arrayLikeKeys(value, inherited) {\n var isArr = isArray(value),\n isArg = !isArr && isArguments(value),\n isBuff = !isArr && !isArg && isBuffer(value),\n isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n skipIndexes = isArr || isArg || isBuff || isType,\n result = skipIndexes ? baseTimes(value.length, String) : [],\n length = result.length;\n\n for (var key in value) {\n if ((inherited || hasOwnProperty.call(value, key)) &&\n !(skipIndexes && (\n // Safari 9 has enumerable `arguments.length` in strict mode.\n key == 'length' ||\n // Node.js 0.10 has enumerable non-index properties on buffers.\n (isBuff && (key == 'offset' || key == 'parent')) ||\n // PhantomJS 2 has enumerable non-index properties on typed arrays.\n (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n // Skip index properties.\n isIndex(key, length)\n ))) {\n result.push(key);\n }\n }\n return result;\n }\n\n /**\n * A specialized version of `_.sample` for arrays.\n *\n * @private\n * @param {Array} array The array to sample.\n * @returns {*} Returns the random element.\n */\n function arraySample(array) {\n var length = array.length;\n return length ? array[baseRandom(0, length - 1)] : undefined;\n }\n\n /**\n * A specialized version of `_.sampleSize` for arrays.\n *\n * @private\n * @param {Array} array The array to sample.\n * @param {number} n The number of elements to sample.\n * @returns {Array} Returns the random elements.\n */\n function arraySampleSize(array, n) {\n return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));\n }\n\n /**\n * A specialized version of `_.shuffle` for arrays.\n *\n * @private\n * @param {Array} array The array to shuffle.\n * @returns {Array} Returns the new shuffled array.\n */\n function arrayShuffle(array) {\n return shuffleSelf(copyArray(array));\n }\n\n /**\n * This function is like `assignValue` except that it doesn't assign\n * `undefined` values.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\n function assignMergeValue(object, key, value) {\n if ((value !== undefined && !eq(object[key], value)) ||\n (value === undefined && !(key in object))) {\n baseAssignValue(object, key, value);\n }\n }\n\n /**\n * Assigns `value` to `key` of `object` if the existing value is not equivalent\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\n function assignValue(object, key, value) {\n var objValue = object[key];\n if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||\n (value === undefined && !(key in object))) {\n baseAssignValue(object, key, value);\n }\n }\n\n /**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\n function assocIndexOf(array, key) {\n var length = array.length;\n while (length--) {\n if (eq(array[length][0], key)) {\n return length;\n }\n }\n return -1;\n }\n\n /**\n * Aggregates elements of `collection` on `accumulator` with keys transformed\n * by `iteratee` and values set by `setter`.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} setter The function to set `accumulator` values.\n * @param {Function} iteratee The iteratee to transform keys.\n * @param {Object} accumulator The initial aggregated object.\n * @returns {Function} Returns `accumulator`.\n */\n function baseAggregator(collection, setter, iteratee, accumulator) {\n baseEach(collection, function(value, key, collection) {\n setter(accumulator, value, iteratee(value), collection);\n });\n return accumulator;\n }\n\n /**\n * The base implementation of `_.assign` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\n function baseAssign(object, source) {\n return object && copyObject(source, keys(source), object);\n }\n\n /**\n * The base implementation of `_.assignIn` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\n function baseAssignIn(object, source) {\n return object && copyObject(source, keysIn(source), object);\n }\n\n /**\n * The base implementation of `assignValue` and `assignMergeValue` without\n * value checks.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\n function baseAssignValue(object, key, value) {\n if (key == '__proto__' && defineProperty) {\n defineProperty(object, key, {\n 'configurable': true,\n 'enumerable': true,\n 'value': value,\n 'writable': true\n });\n } else {\n object[key] = value;\n }\n }\n\n /**\n * The base implementation of `_.at` without support for individual paths.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {string[]} paths The property paths to pick.\n * @returns {Array} Returns the picked elements.\n */\n function baseAt(object, paths) {\n var index = -1,\n length = paths.length,\n result = Array(length),\n skip = object == null;\n\n while (++index < length) {\n result[index] = skip ? undefined : get(object, paths[index]);\n }\n return result;\n }\n\n /**\n * The base implementation of `_.clamp` which doesn't coerce arguments.\n *\n * @private\n * @param {number} number The number to clamp.\n * @param {number} [lower] The lower bound.\n * @param {number} upper The upper bound.\n * @returns {number} Returns the clamped number.\n */\n function baseClamp(number, lower, upper) {\n if (number === number) {\n if (upper !== undefined) {\n number = number <= upper ? number : upper;\n }\n if (lower !== undefined) {\n number = number >= lower ? number : lower;\n }\n }\n return number;\n }\n\n /**\n * The base implementation of `_.clone` and `_.cloneDeep` which tracks\n * traversed objects.\n *\n * @private\n * @param {*} value The value to clone.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Deep clone\n * 2 - Flatten inherited properties\n * 4 - Clone symbols\n * @param {Function} [customizer] The function to customize cloning.\n * @param {string} [key] The key of `value`.\n * @param {Object} [object] The parent object of `value`.\n * @param {Object} [stack] Tracks traversed objects and their clone counterparts.\n * @returns {*} Returns the cloned value.\n */\n function baseClone(value, bitmask, customizer, key, object, stack) {\n var result,\n isDeep = bitmask & CLONE_DEEP_FLAG,\n isFlat = bitmask & CLONE_FLAT_FLAG,\n isFull = bitmask & CLONE_SYMBOLS_FLAG;\n\n if (customizer) {\n result = object ? customizer(value, key, object, stack) : customizer(value);\n }\n if (result !== undefined) {\n return result;\n }\n if (!isObject(value)) {\n return value;\n }\n var isArr = isArray(value);\n if (isArr) {\n result = initCloneArray(value);\n if (!isDeep) {\n return copyArray(value, result);\n }\n } else {\n var tag = getTag(value),\n isFunc = tag == funcTag || tag == genTag;\n\n if (isBuffer(value)) {\n return cloneBuffer(value, isDeep);\n }\n if (tag == objectTag || tag == argsTag || (isFunc && !object)) {\n result = (isFlat || isFunc) ? {} : initCloneObject(value);\n if (!isDeep) {\n return isFlat\n ? copySymbolsIn(value, baseAssignIn(result, value))\n : copySymbols(value, baseAssign(result, value));\n }\n } else {\n if (!cloneableTags[tag]) {\n return object ? value : {};\n }\n result = initCloneByTag(value, tag, isDeep);\n }\n }\n // Check for circular references and return its corresponding clone.\n stack || (stack = new Stack);\n var stacked = stack.get(value);\n if (stacked) {\n return stacked;\n }\n stack.set(value, result);\n\n if (isSet(value)) {\n value.forEach(function(subValue) {\n result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));\n });\n } else if (isMap(value)) {\n value.forEach(function(subValue, key) {\n result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n }\n\n var keysFunc = isFull\n ? (isFlat ? getAllKeysIn : getAllKeys)\n : (isFlat ? keysIn : keys);\n\n var props = isArr ? undefined : keysFunc(value);\n arrayEach(props || value, function(subValue, key) {\n if (props) {\n key = subValue;\n subValue = value[key];\n }\n // Recursively populate clone (susceptible to call stack limits).\n assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n return result;\n }\n\n /**\n * The base implementation of `_.conforms` which doesn't clone `source`.\n *\n * @private\n * @param {Object} source The object of property predicates to conform to.\n * @returns {Function} Returns the new spec function.\n */\n function baseConforms(source) {\n var props = keys(source);\n return function(object) {\n return baseConformsTo(object, source, props);\n };\n }\n\n /**\n * The base implementation of `_.conformsTo` which accepts `props` to check.\n *\n * @private\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property predicates to conform to.\n * @returns {boolean} Returns `true` if `object` conforms, else `false`.\n */\n function baseConformsTo(object, source, props) {\n var length = props.length;\n if (object == null) {\n return !length;\n }\n object = Object(object);\n while (length--) {\n var key = props[length],\n predicate = source[key],\n value = object[key];\n\n if ((value === undefined && !(key in object)) || !predicate(value)) {\n return false;\n }\n }\n return true;\n }\n\n /**\n * The base implementation of `_.delay` and `_.defer` which accepts `args`\n * to provide to `func`.\n *\n * @private\n * @param {Function} func The function to delay.\n * @param {number} wait The number of milliseconds to delay invocation.\n * @param {Array} args The arguments to provide to `func`.\n * @returns {number|Object} Returns the timer id or timeout object.\n */\n function baseDelay(func, wait, args) {\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n return setTimeout(function() { func.apply(undefined, args); }, wait);\n }\n\n /**\n * The base implementation of methods like `_.difference` without support\n * for excluding multiple arrays or iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {Array} values The values to exclude.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of filtered values.\n */\n function baseDifference(array, values, iteratee, comparator) {\n var index = -1,\n includes = arrayIncludes,\n isCommon = true,\n length = array.length,\n result = [],\n valuesLength = values.length;\n\n if (!length) {\n return result;\n }\n if (iteratee) {\n values = arrayMap(values, baseUnary(iteratee));\n }\n if (comparator) {\n includes = arrayIncludesWith;\n isCommon = false;\n }\n else if (values.length >= LARGE_ARRAY_SIZE) {\n includes = cacheHas;\n isCommon = false;\n values = new SetCache(values);\n }\n outer:\n while (++index < length) {\n var value = array[index],\n computed = iteratee == null ? value : iteratee(value);\n\n value = (comparator || value !== 0) ? value : 0;\n if (isCommon && computed === computed) {\n var valuesIndex = valuesLength;\n while (valuesIndex--) {\n if (values[valuesIndex] === computed) {\n continue outer;\n }\n }\n result.push(value);\n }\n else if (!includes(values, computed, comparator)) {\n result.push(value);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.forEach` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array|Object} Returns `collection`.\n */\n var baseEach = createBaseEach(baseForOwn);\n\n /**\n * The base implementation of `_.forEachRight` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array|Object} Returns `collection`.\n */\n var baseEachRight = createBaseEach(baseForOwnRight, true);\n\n /**\n * The base implementation of `_.every` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if all elements pass the predicate check,\n * else `false`\n */\n function baseEvery(collection, predicate) {\n var result = true;\n baseEach(collection, function(value, index, collection) {\n result = !!predicate(value, index, collection);\n return result;\n });\n return result;\n }\n\n /**\n * The base implementation of methods like `_.max` and `_.min` which accepts a\n * `comparator` to determine the extremum value.\n *\n * @private\n * @param {Array} array The array to iterate over.\n * @param {Function} iteratee The iteratee invoked per iteration.\n * @param {Function} comparator The comparator used to compare values.\n * @returns {*} Returns the extremum value.\n */\n function baseExtremum(array, iteratee, comparator) {\n var index = -1,\n length = array.length;\n\n while (++index < length) {\n var value = array[index],\n current = iteratee(value);\n\n if (current != null && (computed === undefined\n ? (current === current && !isSymbol(current))\n : comparator(current, computed)\n )) {\n var computed = current,\n result = value;\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.fill` without an iteratee call guard.\n *\n * @private\n * @param {Array} array The array to fill.\n * @param {*} value The value to fill `array` with.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns `array`.\n */\n function baseFill(array, value, start, end) {\n var length = array.length;\n\n start = toInteger(start);\n if (start < 0) {\n start = -start > length ? 0 : (length + start);\n }\n end = (end === undefined || end > length) ? length : toInteger(end);\n if (end < 0) {\n end += length;\n }\n end = start > end ? 0 : toLength(end);\n while (start < end) {\n array[start++] = value;\n }\n return array;\n }\n\n /**\n * The base implementation of `_.filter` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\n function baseFilter(collection, predicate) {\n var result = [];\n baseEach(collection, function(value, index, collection) {\n if (predicate(value, index, collection)) {\n result.push(value);\n }\n });\n return result;\n }\n\n /**\n * The base implementation of `_.flatten` with support for restricting flattening.\n *\n * @private\n * @param {Array} array The array to flatten.\n * @param {number} depth The maximum recursion depth.\n * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.\n * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.\n * @param {Array} [result=[]] The initial result value.\n * @returns {Array} Returns the new flattened array.\n */\n function baseFlatten(array, depth, predicate, isStrict, result) {\n var index = -1,\n length = array.length;\n\n predicate || (predicate = isFlattenable);\n result || (result = []);\n\n while (++index < length) {\n var value = array[index];\n if (depth > 0 && predicate(value)) {\n if (depth > 1) {\n // Recursively flatten arrays (susceptible to call stack limits).\n baseFlatten(value, depth - 1, predicate, isStrict, result);\n } else {\n arrayPush(result, value);\n }\n } else if (!isStrict) {\n result[result.length] = value;\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `baseForOwn` which iterates over `object`\n * properties returned by `keysFunc` and invokes `iteratee` for each property.\n * Iteratee functions may exit iteration early by explicitly returning `false`.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @returns {Object} Returns `object`.\n */\n var baseFor = createBaseFor();\n\n /**\n * This function is like `baseFor` except that it iterates over properties\n * in the opposite order.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @returns {Object} Returns `object`.\n */\n var baseForRight = createBaseFor(true);\n\n /**\n * The base implementation of `_.forOwn` without support for iteratee shorthands.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Object} Returns `object`.\n */\n function baseForOwn(object, iteratee) {\n return object && baseFor(object, iteratee, keys);\n }\n\n /**\n * The base implementation of `_.forOwnRight` without support for iteratee shorthands.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Object} Returns `object`.\n */\n function baseForOwnRight(object, iteratee) {\n return object && baseForRight(object, iteratee, keys);\n }\n\n /**\n * The base implementation of `_.functions` which creates an array of\n * `object` function property names filtered from `props`.\n *\n * @private\n * @param {Object} object The object to inspect.\n * @param {Array} props The property names to filter.\n * @returns {Array} Returns the function names.\n */\n function baseFunctions(object, props) {\n return arrayFilter(props, function(key) {\n return isFunction(object[key]);\n });\n }\n\n /**\n * The base implementation of `_.get` without support for default values.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to get.\n * @returns {*} Returns the resolved value.\n */\n function baseGet(object, path) {\n path = castPath(path, object);\n\n var index = 0,\n length = path.length;\n\n while (object != null && index < length) {\n object = object[toKey(path[index++])];\n }\n return (index && index == length) ? object : undefined;\n }\n\n /**\n * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @param {Function} symbolsFunc The function to get the symbols of `object`.\n * @returns {Array} Returns the array of property names and symbols.\n */\n function baseGetAllKeys(object, keysFunc, symbolsFunc) {\n var result = keysFunc(object);\n return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n }\n\n /**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\n function baseGetTag(value) {\n if (value == null) {\n return value === undefined ? undefinedTag : nullTag;\n }\n return (symToStringTag && symToStringTag in Object(value))\n ? getRawTag(value)\n : objectToString(value);\n }\n\n /**\n * The base implementation of `_.gt` which doesn't coerce arguments.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is greater than `other`,\n * else `false`.\n */\n function baseGt(value, other) {\n return value > other;\n }\n\n /**\n * The base implementation of `_.has` without support for deep paths.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {Array|string} key The key to check.\n * @returns {boolean} Returns `true` if `key` exists, else `false`.\n */\n function baseHas(object, key) {\n return object != null && hasOwnProperty.call(object, key);\n }\n\n /**\n * The base implementation of `_.hasIn` without support for deep paths.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {Array|string} key The key to check.\n * @returns {boolean} Returns `true` if `key` exists, else `false`.\n */\n function baseHasIn(object, key) {\n return object != null && key in Object(object);\n }\n\n /**\n * The base implementation of `_.inRange` which doesn't coerce arguments.\n *\n * @private\n * @param {number} number The number to check.\n * @param {number} start The start of the range.\n * @param {number} end The end of the range.\n * @returns {boolean} Returns `true` if `number` is in the range, else `false`.\n */\n function baseInRange(number, start, end) {\n return number >= nativeMin(start, end) && number < nativeMax(start, end);\n }\n\n /**\n * The base implementation of methods like `_.intersection`, without support\n * for iteratee shorthands, that accepts an array of arrays to inspect.\n *\n * @private\n * @param {Array} arrays The arrays to inspect.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of shared values.\n */\n function baseIntersection(arrays, iteratee, comparator) {\n var includes = comparator ? arrayIncludesWith : arrayIncludes,\n length = arrays[0].length,\n othLength = arrays.length,\n othIndex = othLength,\n caches = Array(othLength),\n maxLength = Infinity,\n result = [];\n\n while (othIndex--) {\n var array = arrays[othIndex];\n if (othIndex && iteratee) {\n array = arrayMap(array, baseUnary(iteratee));\n }\n maxLength = nativeMin(array.length, maxLength);\n caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))\n ? new SetCache(othIndex && array)\n : undefined;\n }\n array = arrays[0];\n\n var index = -1,\n seen = caches[0];\n\n outer:\n while (++index < length && result.length < maxLength) {\n var value = array[index],\n computed = iteratee ? iteratee(value) : value;\n\n value = (comparator || value !== 0) ? value : 0;\n if (!(seen\n ? cacheHas(seen, computed)\n : includes(result, computed, comparator)\n )) {\n othIndex = othLength;\n while (--othIndex) {\n var cache = caches[othIndex];\n if (!(cache\n ? cacheHas(cache, computed)\n : includes(arrays[othIndex], computed, comparator))\n ) {\n continue outer;\n }\n }\n if (seen) {\n seen.push(computed);\n }\n result.push(value);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.invert` and `_.invertBy` which inverts\n * `object` with values transformed by `iteratee` and set by `setter`.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} setter The function to set `accumulator` values.\n * @param {Function} iteratee The iteratee to transform values.\n * @param {Object} accumulator The initial inverted object.\n * @returns {Function} Returns `accumulator`.\n */\n function baseInverter(object, setter, iteratee, accumulator) {\n baseForOwn(object, function(value, key, object) {\n setter(accumulator, iteratee(value), key, object);\n });\n return accumulator;\n }\n\n /**\n * The base implementation of `_.invoke` without support for individual\n * method arguments.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the method to invoke.\n * @param {Array} args The arguments to invoke the method with.\n * @returns {*} Returns the result of the invoked method.\n */\n function baseInvoke(object, path, args) {\n path = castPath(path, object);\n object = parent(object, path);\n var func = object == null ? object : object[toKey(last(path))];\n return func == null ? undefined : apply(func, object, args);\n }\n\n /**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\n function baseIsArguments(value) {\n return isObjectLike(value) && baseGetTag(value) == argsTag;\n }\n\n /**\n * The base implementation of `_.isArrayBuffer` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.\n */\n function baseIsArrayBuffer(value) {\n return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;\n }\n\n /**\n * The base implementation of `_.isDate` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a date object, else `false`.\n */\n function baseIsDate(value) {\n return isObjectLike(value) && baseGetTag(value) == dateTag;\n }\n\n /**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\n function baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n }\n\n /**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\n function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n }\n\n /**\n * The base implementation of `_.isMap` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n */\n function baseIsMap(value) {\n return isObjectLike(value) && getTag(value) == mapTag;\n }\n\n /**\n * The base implementation of `_.isMatch` without support for iteratee shorthands.\n *\n * @private\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property values to match.\n * @param {Array} matchData The property names, values, and compare flags to match.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n */\n function baseIsMatch(object, source, matchData, customizer) {\n var index = matchData.length,\n length = index,\n noCustomizer = !customizer;\n\n if (object == null) {\n return !length;\n }\n object = Object(object);\n while (index--) {\n var data = matchData[index];\n if ((noCustomizer && data[2])\n ? data[1] !== object[data[0]]\n : !(data[0] in object)\n ) {\n return false;\n }\n }\n while (++index < length) {\n data = matchData[index];\n var key = data[0],\n objValue = object[key],\n srcValue = data[1];\n\n if (noCustomizer && data[2]) {\n if (objValue === undefined && !(key in object)) {\n return false;\n }\n } else {\n var stack = new Stack;\n if (customizer) {\n var result = customizer(objValue, srcValue, key, object, source, stack);\n }\n if (!(result === undefined\n ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)\n : result\n )) {\n return false;\n }\n }\n }\n return true;\n }\n\n /**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n */\n function baseIsNative(value) {\n if (!isObject(value) || isMasked(value)) {\n return false;\n }\n var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n return pattern.test(toSource(value));\n }\n\n /**\n * The base implementation of `_.isRegExp` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.\n */\n function baseIsRegExp(value) {\n return isObjectLike(value) && baseGetTag(value) == regexpTag;\n }\n\n /**\n * The base implementation of `_.isSet` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n */\n function baseIsSet(value) {\n return isObjectLike(value) && getTag(value) == setTag;\n }\n\n /**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\n function baseIsTypedArray(value) {\n return isObjectLike(value) &&\n isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n }\n\n /**\n * The base implementation of `_.iteratee`.\n *\n * @private\n * @param {*} [value=_.identity] The value to convert to an iteratee.\n * @returns {Function} Returns the iteratee.\n */\n function baseIteratee(value) {\n // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.\n // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.\n if (typeof value == 'function') {\n return value;\n }\n if (value == null) {\n return identity;\n }\n if (typeof value == 'object') {\n return isArray(value)\n ? baseMatchesProperty(value[0], value[1])\n : baseMatches(value);\n }\n return property(value);\n }\n\n /**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\n function baseKeys(object) {\n if (!isPrototype(object)) {\n return nativeKeys(object);\n }\n var result = [];\n for (var key in Object(object)) {\n if (hasOwnProperty.call(object, key) && key != 'constructor') {\n result.push(key);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\n function baseKeysIn(object) {\n if (!isObject(object)) {\n return nativeKeysIn(object);\n }\n var isProto = isPrototype(object),\n result = [];\n\n for (var key in object) {\n if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {\n result.push(key);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.lt` which doesn't coerce arguments.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is less than `other`,\n * else `false`.\n */\n function baseLt(value, other) {\n return value < other;\n }\n\n /**\n * The base implementation of `_.map` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\n function baseMap(collection, iteratee) {\n var index = -1,\n result = isArrayLike(collection) ? Array(collection.length) : [];\n\n baseEach(collection, function(value, key, collection) {\n result[++index] = iteratee(value, key, collection);\n });\n return result;\n }\n\n /**\n * The base implementation of `_.matches` which doesn't clone `source`.\n *\n * @private\n * @param {Object} source The object of property values to match.\n * @returns {Function} Returns the new spec function.\n */\n function baseMatches(source) {\n var matchData = getMatchData(source);\n if (matchData.length == 1 && matchData[0][2]) {\n return matchesStrictComparable(matchData[0][0], matchData[0][1]);\n }\n return function(object) {\n return object === source || baseIsMatch(object, source, matchData);\n };\n }\n\n /**\n * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.\n *\n * @private\n * @param {string} path The path of the property to get.\n * @param {*} srcValue The value to match.\n * @returns {Function} Returns the new spec function.\n */\n function baseMatchesProperty(path, srcValue) {\n if (isKey(path) && isStrictComparable(srcValue)) {\n return matchesStrictComparable(toKey(path), srcValue);\n }\n return function(object) {\n var objValue = get(object, path);\n return (objValue === undefined && objValue === srcValue)\n ? hasIn(object, path)\n : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);\n };\n }\n\n /**\n * The base implementation of `_.merge` without support for multiple sources.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @param {number} srcIndex The index of `source`.\n * @param {Function} [customizer] The function to customize merged values.\n * @param {Object} [stack] Tracks traversed source values and their merged\n * counterparts.\n */\n function baseMerge(object, source, srcIndex, customizer, stack) {\n if (object === source) {\n return;\n }\n baseFor(source, function(srcValue, key) {\n stack || (stack = new Stack);\n if (isObject(srcValue)) {\n baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);\n }\n else {\n var newValue = customizer\n ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)\n : undefined;\n\n if (newValue === undefined) {\n newValue = srcValue;\n }\n assignMergeValue(object, key, newValue);\n }\n }, keysIn);\n }\n\n /**\n * A specialized version of `baseMerge` for arrays and objects which performs\n * deep merges and tracks traversed objects enabling objects with circular\n * references to be merged.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @param {string} key The key of the value to merge.\n * @param {number} srcIndex The index of `source`.\n * @param {Function} mergeFunc The function to merge values.\n * @param {Function} [customizer] The function to customize assigned values.\n * @param {Object} [stack] Tracks traversed source values and their merged\n * counterparts.\n */\n function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {\n var objValue = safeGet(object, key),\n srcValue = safeGet(source, key),\n stacked = stack.get(srcValue);\n\n if (stacked) {\n assignMergeValue(object, key, stacked);\n return;\n }\n var newValue = customizer\n ? customizer(objValue, srcValue, (key + ''), object, source, stack)\n : undefined;\n\n var isCommon = newValue === undefined;\n\n if (isCommon) {\n var isArr = isArray(srcValue),\n isBuff = !isArr && isBuffer(srcValue),\n isTyped = !isArr && !isBuff && isTypedArray(srcValue);\n\n newValue = srcValue;\n if (isArr || isBuff || isTyped) {\n if (isArray(objValue)) {\n newValue = objValue;\n }\n else if (isArrayLikeObject(objValue)) {\n newValue = copyArray(objValue);\n }\n else if (isBuff) {\n isCommon = false;\n newValue = cloneBuffer(srcValue, true);\n }\n else if (isTyped) {\n isCommon = false;\n newValue = cloneTypedArray(srcValue, true);\n }\n else {\n newValue = [];\n }\n }\n else if (isPlainObject(srcValue) || isArguments(srcValue)) {\n newValue = objValue;\n if (isArguments(objValue)) {\n newValue = toPlainObject(objValue);\n }\n else if (!isObject(objValue) || isFunction(objValue)) {\n newValue = initCloneObject(srcValue);\n }\n }\n else {\n isCommon = false;\n }\n }\n if (isCommon) {\n // Recursively merge objects and arrays (susceptible to call stack limits).\n stack.set(srcValue, newValue);\n mergeFunc(newValue, srcValue, srcIndex, customizer, stack);\n stack['delete'](srcValue);\n }\n assignMergeValue(object, key, newValue);\n }\n\n /**\n * The base implementation of `_.nth` which doesn't coerce arguments.\n *\n * @private\n * @param {Array} array The array to query.\n * @param {number} n The index of the element to return.\n * @returns {*} Returns the nth element of `array`.\n */\n function baseNth(array, n) {\n var length = array.length;\n if (!length) {\n return;\n }\n n += n < 0 ? length : 0;\n return isIndex(n, length) ? array[n] : undefined;\n }\n\n /**\n * The base implementation of `_.orderBy` without param guards.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.\n * @param {string[]} orders The sort orders of `iteratees`.\n * @returns {Array} Returns the new sorted array.\n */\n function baseOrderBy(collection, iteratees, orders) {\n if (iteratees.length) {\n iteratees = arrayMap(iteratees, function(iteratee) {\n if (isArray(iteratee)) {\n return function(value) {\n return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);\n }\n }\n return iteratee;\n });\n } else {\n iteratees = [identity];\n }\n\n var index = -1;\n iteratees = arrayMap(iteratees, baseUnary(getIteratee()));\n\n var result = baseMap(collection, function(value, key, collection) {\n var criteria = arrayMap(iteratees, function(iteratee) {\n return iteratee(value);\n });\n return { 'criteria': criteria, 'index': ++index, 'value': value };\n });\n\n return baseSortBy(result, function(object, other) {\n return compareMultiple(object, other, orders);\n });\n }\n\n /**\n * The base implementation of `_.pick` without support for individual\n * property identifiers.\n *\n * @private\n * @param {Object} object The source object.\n * @param {string[]} paths The property paths to pick.\n * @returns {Object} Returns the new object.\n */\n function basePick(object, paths) {\n return basePickBy(object, paths, function(value, path) {\n return hasIn(object, path);\n });\n }\n\n /**\n * The base implementation of `_.pickBy` without support for iteratee shorthands.\n *\n * @private\n * @param {Object} object The source object.\n * @param {string[]} paths The property paths to pick.\n * @param {Function} predicate The function invoked per property.\n * @returns {Object} Returns the new object.\n */\n function basePickBy(object, paths, predicate) {\n var index = -1,\n length = paths.length,\n result = {};\n\n while (++index < length) {\n var path = paths[index],\n value = baseGet(object, path);\n\n if (predicate(value, path)) {\n baseSet(result, castPath(path, object), value);\n }\n }\n return result;\n }\n\n /**\n * A specialized version of `baseProperty` which supports deep paths.\n *\n * @private\n * @param {Array|string} path The path of the property to get.\n * @returns {Function} Returns the new accessor function.\n */\n function basePropertyDeep(path) {\n return function(object) {\n return baseGet(object, path);\n };\n }\n\n /**\n * The base implementation of `_.pullAllBy` without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to remove.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns `array`.\n */\n function basePullAll(array, values, iteratee, comparator) {\n var indexOf = comparator ? baseIndexOfWith : baseIndexOf,\n index = -1,\n length = values.length,\n seen = array;\n\n if (array === values) {\n values = copyArray(values);\n }\n if (iteratee) {\n seen = arrayMap(array, baseUnary(iteratee));\n }\n while (++index < length) {\n var fromIndex = 0,\n value = values[index],\n computed = iteratee ? iteratee(value) : value;\n\n while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {\n if (seen !== array) {\n splice.call(seen, fromIndex, 1);\n }\n splice.call(array, fromIndex, 1);\n }\n }\n return array;\n }\n\n /**\n * The base implementation of `_.pullAt` without support for individual\n * indexes or capturing the removed elements.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {number[]} indexes The indexes of elements to remove.\n * @returns {Array} Returns `array`.\n */\n function basePullAt(array, indexes) {\n var length = array ? indexes.length : 0,\n lastIndex = length - 1;\n\n while (length--) {\n var index = indexes[length];\n if (length == lastIndex || index !== previous) {\n var previous = index;\n if (isIndex(index)) {\n splice.call(array, index, 1);\n } else {\n baseUnset(array, index);\n }\n }\n }\n return array;\n }\n\n /**\n * The base implementation of `_.random` without support for returning\n * floating-point numbers.\n *\n * @private\n * @param {number} lower The lower bound.\n * @param {number} upper The upper bound.\n * @returns {number} Returns the random number.\n */\n function baseRandom(lower, upper) {\n return lower + nativeFloor(nativeRandom() * (upper - lower + 1));\n }\n\n /**\n * The base implementation of `_.range` and `_.rangeRight` which doesn't\n * coerce arguments.\n *\n * @private\n * @param {number} start The start of the range.\n * @param {number} end The end of the range.\n * @param {number} step The value to increment or decrement by.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Array} Returns the range of numbers.\n */\n function baseRange(start, end, step, fromRight) {\n var index = -1,\n length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),\n result = Array(length);\n\n while (length--) {\n result[fromRight ? length : ++index] = start;\n start += step;\n }\n return result;\n }\n\n /**\n * The base implementation of `_.repeat` which doesn't coerce arguments.\n *\n * @private\n * @param {string} string The string to repeat.\n * @param {number} n The number of times to repeat the string.\n * @returns {string} Returns the repeated string.\n */\n function baseRepeat(string, n) {\n var result = '';\n if (!string || n < 1 || n > MAX_SAFE_INTEGER) {\n return result;\n }\n // Leverage the exponentiation by squaring algorithm for a faster repeat.\n // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.\n do {\n if (n % 2) {\n result += string;\n }\n n = nativeFloor(n / 2);\n if (n) {\n string += string;\n }\n } while (n);\n\n return result;\n }\n\n /**\n * The base implementation of `_.rest` which doesn't validate or coerce arguments.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @returns {Function} Returns the new function.\n */\n function baseRest(func, start) {\n return setToString(overRest(func, start, identity), func + '');\n }\n\n /**\n * The base implementation of `_.sample`.\n *\n * @private\n * @param {Array|Object} collection The collection to sample.\n * @returns {*} Returns the random element.\n */\n function baseSample(collection) {\n return arraySample(values(collection));\n }\n\n /**\n * The base implementation of `_.sampleSize` without param guards.\n *\n * @private\n * @param {Array|Object} collection The collection to sample.\n * @param {number} n The number of elements to sample.\n * @returns {Array} Returns the random elements.\n */\n function baseSampleSize(collection, n) {\n var array = values(collection);\n return shuffleSelf(array, baseClamp(n, 0, array.length));\n }\n\n /**\n * The base implementation of `_.set`.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {*} value The value to set.\n * @param {Function} [customizer] The function to customize path creation.\n * @returns {Object} Returns `object`.\n */\n function baseSet(object, path, value, customizer) {\n if (!isObject(object)) {\n return object;\n }\n path = castPath(path, object);\n\n var index = -1,\n length = path.length,\n lastIndex = length - 1,\n nested = object;\n\n while (nested != null && ++index < length) {\n var key = toKey(path[index]),\n newValue = value;\n\n if (key === '__proto__' || key === 'constructor' || key === 'prototype') {\n return object;\n }\n\n if (index != lastIndex) {\n var objValue = nested[key];\n newValue = customizer ? customizer(objValue, key, nested) : undefined;\n if (newValue === undefined) {\n newValue = isObject(objValue)\n ? objValue\n : (isIndex(path[index + 1]) ? [] : {});\n }\n }\n assignValue(nested, key, newValue);\n nested = nested[key];\n }\n return object;\n }\n\n /**\n * The base implementation of `setData` without support for hot loop shorting.\n *\n * @private\n * @param {Function} func The function to associate metadata with.\n * @param {*} data The metadata.\n * @returns {Function} Returns `func`.\n */\n var baseSetData = !metaMap ? identity : function(func, data) {\n metaMap.set(func, data);\n return func;\n };\n\n /**\n * The base implementation of `setToString` without support for hot loop shorting.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\n var baseSetToString = !defineProperty ? identity : function(func, string) {\n return defineProperty(func, 'toString', {\n 'configurable': true,\n 'enumerable': false,\n 'value': constant(string),\n 'writable': true\n });\n };\n\n /**\n * The base implementation of `_.shuffle`.\n *\n * @private\n * @param {Array|Object} collection The collection to shuffle.\n * @returns {Array} Returns the new shuffled array.\n */\n function baseShuffle(collection) {\n return shuffleSelf(values(collection));\n }\n\n /**\n * The base implementation of `_.slice` without an iteratee call guard.\n *\n * @private\n * @param {Array} array The array to slice.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the slice of `array`.\n */\n function baseSlice(array, start, end) {\n var index = -1,\n length = array.length;\n\n if (start < 0) {\n start = -start > length ? 0 : (length + start);\n }\n end = end > length ? length : end;\n if (end < 0) {\n end += length;\n }\n length = start > end ? 0 : ((end - start) >>> 0);\n start >>>= 0;\n\n var result = Array(length);\n while (++index < length) {\n result[index] = array[index + start];\n }\n return result;\n }\n\n /**\n * The base implementation of `_.some` without support for iteratee shorthands.\n *\n * @private\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\n function baseSome(collection, predicate) {\n var result;\n\n baseEach(collection, function(value, index, collection) {\n result = predicate(value, index, collection);\n return !result;\n });\n return !!result;\n }\n\n /**\n * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which\n * performs a binary search of `array` to determine the index at which `value`\n * should be inserted into `array` in order to maintain its sort order.\n *\n * @private\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @param {boolean} [retHighest] Specify returning the highest qualified index.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n */\n function baseSortedIndex(array, value, retHighest) {\n var low = 0,\n high = array == null ? low : array.length;\n\n if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {\n while (low < high) {\n var mid = (low + high) >>> 1,\n computed = array[mid];\n\n if (computed !== null && !isSymbol(computed) &&\n (retHighest ? (computed <= value) : (computed < value))) {\n low = mid + 1;\n } else {\n high = mid;\n }\n }\n return high;\n }\n return baseSortedIndexBy(array, value, identity, retHighest);\n }\n\n /**\n * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`\n * which invokes `iteratee` for `value` and each element of `array` to compute\n * their sort ranking. The iteratee is invoked with one argument; (value).\n *\n * @private\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @param {Function} iteratee The iteratee invoked per element.\n * @param {boolean} [retHighest] Specify returning the highest qualified index.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n */\n function baseSortedIndexBy(array, value, iteratee, retHighest) {\n var low = 0,\n high = array == null ? 0 : array.length;\n if (high === 0) {\n return 0;\n }\n\n value = iteratee(value);\n var valIsNaN = value !== value,\n valIsNull = value === null,\n valIsSymbol = isSymbol(value),\n valIsUndefined = value === undefined;\n\n while (low < high) {\n var mid = nativeFloor((low + high) / 2),\n computed = iteratee(array[mid]),\n othIsDefined = computed !== undefined,\n othIsNull = computed === null,\n othIsReflexive = computed === computed,\n othIsSymbol = isSymbol(computed);\n\n if (valIsNaN) {\n var setLow = retHighest || othIsReflexive;\n } else if (valIsUndefined) {\n setLow = othIsReflexive && (retHighest || othIsDefined);\n } else if (valIsNull) {\n setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);\n } else if (valIsSymbol) {\n setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);\n } else if (othIsNull || othIsSymbol) {\n setLow = false;\n } else {\n setLow = retHighest ? (computed <= value) : (computed < value);\n }\n if (setLow) {\n low = mid + 1;\n } else {\n high = mid;\n }\n }\n return nativeMin(high, MAX_ARRAY_INDEX);\n }\n\n /**\n * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without\n * support for iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @returns {Array} Returns the new duplicate free array.\n */\n function baseSortedUniq(array, iteratee) {\n var index = -1,\n length = array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index],\n computed = iteratee ? iteratee(value) : value;\n\n if (!index || !eq(computed, seen)) {\n var seen = computed;\n result[resIndex++] = value === 0 ? 0 : value;\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.toNumber` which doesn't ensure correct\n * conversions of binary, hexadecimal, or octal string values.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n */\n function baseToNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n return +value;\n }\n\n /**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\n function baseToString(value) {\n // Exit early for strings to avoid a performance hit in some environments.\n if (typeof value == 'string') {\n return value;\n }\n if (isArray(value)) {\n // Recursively convert values (susceptible to call stack limits).\n return arrayMap(value, baseToString) + '';\n }\n if (isSymbol(value)) {\n return symbolToString ? symbolToString.call(value) : '';\n }\n var result = (value + '');\n return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n }\n\n /**\n * The base implementation of `_.uniqBy` without support for iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new duplicate free array.\n */\n function baseUniq(array, iteratee, comparator) {\n var index = -1,\n includes = arrayIncludes,\n length = array.length,\n isCommon = true,\n result = [],\n seen = result;\n\n if (comparator) {\n isCommon = false;\n includes = arrayIncludesWith;\n }\n else if (length >= LARGE_ARRAY_SIZE) {\n var set = iteratee ? null : createSet(array);\n if (set) {\n return setToArray(set);\n }\n isCommon = false;\n includes = cacheHas;\n seen = new SetCache;\n }\n else {\n seen = iteratee ? [] : result;\n }\n outer:\n while (++index < length) {\n var value = array[index],\n computed = iteratee ? iteratee(value) : value;\n\n value = (comparator || value !== 0) ? value : 0;\n if (isCommon && computed === computed) {\n var seenIndex = seen.length;\n while (seenIndex--) {\n if (seen[seenIndex] === computed) {\n continue outer;\n }\n }\n if (iteratee) {\n seen.push(computed);\n }\n result.push(value);\n }\n else if (!includes(seen, computed, comparator)) {\n if (seen !== result) {\n seen.push(computed);\n }\n result.push(value);\n }\n }\n return result;\n }\n\n /**\n * The base implementation of `_.unset`.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {Array|string} path The property path to unset.\n * @returns {boolean} Returns `true` if the property is deleted, else `false`.\n */\n function baseUnset(object, path) {\n path = castPath(path, object);\n object = parent(object, path);\n return object == null || delete object[toKey(last(path))];\n }\n\n /**\n * The base implementation of `_.update`.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to update.\n * @param {Function} updater The function to produce the updated value.\n * @param {Function} [customizer] The function to customize path creation.\n * @returns {Object} Returns `object`.\n */\n function baseUpdate(object, path, updater, customizer) {\n return baseSet(object, path, updater(baseGet(object, path)), customizer);\n }\n\n /**\n * The base implementation of methods like `_.dropWhile` and `_.takeWhile`\n * without support for iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to query.\n * @param {Function} predicate The function invoked per iteration.\n * @param {boolean} [isDrop] Specify dropping elements instead of taking them.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Array} Returns the slice of `array`.\n */\n function baseWhile(array, predicate, isDrop, fromRight) {\n var length = array.length,\n index = fromRight ? length : -1;\n\n while ((fromRight ? index-- : ++index < length) &&\n predicate(array[index], index, array)) {}\n\n return isDrop\n ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))\n : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));\n }\n\n /**\n * The base implementation of `wrapperValue` which returns the result of\n * performing a sequence of actions on the unwrapped `value`, where each\n * successive action is supplied the return value of the previous.\n *\n * @private\n * @param {*} value The unwrapped value.\n * @param {Array} actions Actions to perform to resolve the unwrapped value.\n * @returns {*} Returns the resolved value.\n */\n function baseWrapperValue(value, actions) {\n var result = value;\n if (result instanceof LazyWrapper) {\n result = result.value();\n }\n return arrayReduce(actions, function(result, action) {\n return action.func.apply(action.thisArg, arrayPush([result], action.args));\n }, result);\n }\n\n /**\n * The base implementation of methods like `_.xor`, without support for\n * iteratee shorthands, that accepts an array of arrays to inspect.\n *\n * @private\n * @param {Array} arrays The arrays to inspect.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of values.\n */\n function baseXor(arrays, iteratee, comparator) {\n var length = arrays.length;\n if (length < 2) {\n return length ? baseUniq(arrays[0]) : [];\n }\n var index = -1,\n result = Array(length);\n\n while (++index < length) {\n var array = arrays[index],\n othIndex = -1;\n\n while (++othIndex < length) {\n if (othIndex != index) {\n result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);\n }\n }\n }\n return baseUniq(baseFlatten(result, 1), iteratee, comparator);\n }\n\n /**\n * This base implementation of `_.zipObject` which assigns values using `assignFunc`.\n *\n * @private\n * @param {Array} props The property identifiers.\n * @param {Array} values The property values.\n * @param {Function} assignFunc The function to assign values.\n * @returns {Object} Returns the new object.\n */\n function baseZipObject(props, values, assignFunc) {\n var index = -1,\n length = props.length,\n valsLength = values.length,\n result = {};\n\n while (++index < length) {\n var value = index < valsLength ? values[index] : undefined;\n assignFunc(result, props[index], value);\n }\n return result;\n }\n\n /**\n * Casts `value` to an empty array if it's not an array like object.\n *\n * @private\n * @param {*} value The value to inspect.\n * @returns {Array|Object} Returns the cast array-like object.\n */\n function castArrayLikeObject(value) {\n return isArrayLikeObject(value) ? value : [];\n }\n\n /**\n * Casts `value` to `identity` if it's not a function.\n *\n * @private\n * @param {*} value The value to inspect.\n * @returns {Function} Returns cast function.\n */\n function castFunction(value) {\n return typeof value == 'function' ? value : identity;\n }\n\n /**\n * Casts `value` to a path array if it's not one.\n *\n * @private\n * @param {*} value The value to inspect.\n * @param {Object} [object] The object to query keys on.\n * @returns {Array} Returns the cast property path array.\n */\n function castPath(value, object) {\n if (isArray(value)) {\n return value;\n }\n return isKey(value, object) ? [value] : stringToPath(toString(value));\n }\n\n /**\n * A `baseRest` alias which can be replaced with `identity` by module\n * replacement plugins.\n *\n * @private\n * @type {Function}\n * @param {Function} func The function to apply a rest parameter to.\n * @returns {Function} Returns the new function.\n */\n var castRest = baseRest;\n\n /**\n * Casts `array` to a slice if it's needed.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {number} start The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the cast slice.\n */\n function castSlice(array, start, end) {\n var length = array.length;\n end = end === undefined ? length : end;\n return (!start && end >= length) ? array : baseSlice(array, start, end);\n }\n\n /**\n * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).\n *\n * @private\n * @param {number|Object} id The timer id or timeout object of the timer to clear.\n */\n var clearTimeout = ctxClearTimeout || function(id) {\n return root.clearTimeout(id);\n };\n\n /**\n * Creates a clone of `buffer`.\n *\n * @private\n * @param {Buffer} buffer The buffer to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Buffer} Returns the cloned buffer.\n */\n function cloneBuffer(buffer, isDeep) {\n if (isDeep) {\n return buffer.slice();\n }\n var length = buffer.length,\n result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);\n\n buffer.copy(result);\n return result;\n }\n\n /**\n * Creates a clone of `arrayBuffer`.\n *\n * @private\n * @param {ArrayBuffer} arrayBuffer The array buffer to clone.\n * @returns {ArrayBuffer} Returns the cloned array buffer.\n */\n function cloneArrayBuffer(arrayBuffer) {\n var result = new arrayBuffer.constructor(arrayBuffer.byteLength);\n new Uint8Array(result).set(new Uint8Array(arrayBuffer));\n return result;\n }\n\n /**\n * Creates a clone of `dataView`.\n *\n * @private\n * @param {Object} dataView The data view to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned data view.\n */\n function cloneDataView(dataView, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;\n return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);\n }\n\n /**\n * Creates a clone of `regexp`.\n *\n * @private\n * @param {Object} regexp The regexp to clone.\n * @returns {Object} Returns the cloned regexp.\n */\n function cloneRegExp(regexp) {\n var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));\n result.lastIndex = regexp.lastIndex;\n return result;\n }\n\n /**\n * Creates a clone of the `symbol` object.\n *\n * @private\n * @param {Object} symbol The symbol object to clone.\n * @returns {Object} Returns the cloned symbol object.\n */\n function cloneSymbol(symbol) {\n return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};\n }\n\n /**\n * Creates a clone of `typedArray`.\n *\n * @private\n * @param {Object} typedArray The typed array to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned typed array.\n */\n function cloneTypedArray(typedArray, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;\n return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);\n }\n\n /**\n * Compares values to sort them in ascending order.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {number} Returns the sort order indicator for `value`.\n */\n function compareAscending(value, other) {\n if (value !== other) {\n var valIsDefined = value !== undefined,\n valIsNull = value === null,\n valIsReflexive = value === value,\n valIsSymbol = isSymbol(value);\n\n var othIsDefined = other !== undefined,\n othIsNull = other === null,\n othIsReflexive = other === other,\n othIsSymbol = isSymbol(other);\n\n if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||\n (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||\n (valIsNull && othIsDefined && othIsReflexive) ||\n (!valIsDefined && othIsReflexive) ||\n !valIsReflexive) {\n return 1;\n }\n if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||\n (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||\n (othIsNull && valIsDefined && valIsReflexive) ||\n (!othIsDefined && valIsReflexive) ||\n !othIsReflexive) {\n return -1;\n }\n }\n return 0;\n }\n\n /**\n * Used by `_.orderBy` to compare multiple properties of a value to another\n * and stable sort them.\n *\n * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,\n * specify an order of \"desc\" for descending or \"asc\" for ascending sort order\n * of corresponding values.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {boolean[]|string[]} orders The order to sort by for each property.\n * @returns {number} Returns the sort order indicator for `object`.\n */\n function compareMultiple(object, other, orders) {\n var index = -1,\n objCriteria = object.criteria,\n othCriteria = other.criteria,\n length = objCriteria.length,\n ordersLength = orders.length;\n\n while (++index < length) {\n var result = compareAscending(objCriteria[index], othCriteria[index]);\n if (result) {\n if (index >= ordersLength) {\n return result;\n }\n var order = orders[index];\n return result * (order == 'desc' ? -1 : 1);\n }\n }\n // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications\n // that causes it, under certain circumstances, to provide the same value for\n // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247\n // for more details.\n //\n // This also ensures a stable sort in V8 and other engines.\n // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.\n return object.index - other.index;\n }\n\n /**\n * Creates an array that is the composition of partially applied arguments,\n * placeholders, and provided arguments into a single array of arguments.\n *\n * @private\n * @param {Array} args The provided arguments.\n * @param {Array} partials The arguments to prepend to those provided.\n * @param {Array} holders The `partials` placeholder indexes.\n * @params {boolean} [isCurried] Specify composing for a curried function.\n * @returns {Array} Returns the new array of composed arguments.\n */\n function composeArgs(args, partials, holders, isCurried) {\n var argsIndex = -1,\n argsLength = args.length,\n holdersLength = holders.length,\n leftIndex = -1,\n leftLength = partials.length,\n rangeLength = nativeMax(argsLength - holdersLength, 0),\n result = Array(leftLength + rangeLength),\n isUncurried = !isCurried;\n\n while (++leftIndex < leftLength) {\n result[leftIndex] = partials[leftIndex];\n }\n while (++argsIndex < holdersLength) {\n if (isUncurried || argsIndex < argsLength) {\n result[holders[argsIndex]] = args[argsIndex];\n }\n }\n while (rangeLength--) {\n result[leftIndex++] = args[argsIndex++];\n }\n return result;\n }\n\n /**\n * This function is like `composeArgs` except that the arguments composition\n * is tailored for `_.partialRight`.\n *\n * @private\n * @param {Array} args The provided arguments.\n * @param {Array} partials The arguments to append to those provided.\n * @param {Array} holders The `partials` placeholder indexes.\n * @params {boolean} [isCurried] Specify composing for a curried function.\n * @returns {Array} Returns the new array of composed arguments.\n */\n function composeArgsRight(args, partials, holders, isCurried) {\n var argsIndex = -1,\n argsLength = args.length,\n holdersIndex = -1,\n holdersLength = holders.length,\n rightIndex = -1,\n rightLength = partials.length,\n rangeLength = nativeMax(argsLength - holdersLength, 0),\n result = Array(rangeLength + rightLength),\n isUncurried = !isCurried;\n\n while (++argsIndex < rangeLength) {\n result[argsIndex] = args[argsIndex];\n }\n var offset = argsIndex;\n while (++rightIndex < rightLength) {\n result[offset + rightIndex] = partials[rightIndex];\n }\n while (++holdersIndex < holdersLength) {\n if (isUncurried || argsIndex < argsLength) {\n result[offset + holders[holdersIndex]] = args[argsIndex++];\n }\n }\n return result;\n }\n\n /**\n * Copies the values of `source` to `array`.\n *\n * @private\n * @param {Array} source The array to copy values from.\n * @param {Array} [array=[]] The array to copy values to.\n * @returns {Array} Returns `array`.\n */\n function copyArray(source, array) {\n var index = -1,\n length = source.length;\n\n array || (array = Array(length));\n while (++index < length) {\n array[index] = source[index];\n }\n return array;\n }\n\n /**\n * Copies properties of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy properties from.\n * @param {Array} props The property identifiers to copy.\n * @param {Object} [object={}] The object to copy properties to.\n * @param {Function} [customizer] The function to customize copied values.\n * @returns {Object} Returns `object`.\n */\n function copyObject(source, props, object, customizer) {\n var isNew = !object;\n object || (object = {});\n\n var index = -1,\n length = props.length;\n\n while (++index < length) {\n var key = props[index];\n\n var newValue = customizer\n ? customizer(object[key], source[key], key, object, source)\n : undefined;\n\n if (newValue === undefined) {\n newValue = source[key];\n }\n if (isNew) {\n baseAssignValue(object, key, newValue);\n } else {\n assignValue(object, key, newValue);\n }\n }\n return object;\n }\n\n /**\n * Copies own symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\n function copySymbols(source, object) {\n return copyObject(source, getSymbols(source), object);\n }\n\n /**\n * Copies own and inherited symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\n function copySymbolsIn(source, object) {\n return copyObject(source, getSymbolsIn(source), object);\n }\n\n /**\n * Creates a function like `_.groupBy`.\n *\n * @private\n * @param {Function} setter The function to set accumulator values.\n * @param {Function} [initializer] The accumulator object initializer.\n * @returns {Function} Returns the new aggregator function.\n */\n function createAggregator(setter, initializer) {\n return function(collection, iteratee) {\n var func = isArray(collection) ? arrayAggregator : baseAggregator,\n accumulator = initializer ? initializer() : {};\n\n return func(collection, setter, getIteratee(iteratee, 2), accumulator);\n };\n }\n\n /**\n * Creates a function like `_.assign`.\n *\n * @private\n * @param {Function} assigner The function to assign values.\n * @returns {Function} Returns the new assigner function.\n */\n function createAssigner(assigner) {\n return baseRest(function(object, sources) {\n var index = -1,\n length = sources.length,\n customizer = length > 1 ? sources[length - 1] : undefined,\n guard = length > 2 ? sources[2] : undefined;\n\n customizer = (assigner.length > 3 && typeof customizer == 'function')\n ? (length--, customizer)\n : undefined;\n\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n customizer = length < 3 ? undefined : customizer;\n length = 1;\n }\n object = Object(object);\n while (++index < length) {\n var source = sources[index];\n if (source) {\n assigner(object, source, index, customizer);\n }\n }\n return object;\n });\n }\n\n /**\n * Creates a `baseEach` or `baseEachRight` function.\n *\n * @private\n * @param {Function} eachFunc The function to iterate over a collection.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Function} Returns the new base function.\n */\n function createBaseEach(eachFunc, fromRight) {\n return function(collection, iteratee) {\n if (collection == null) {\n return collection;\n }\n if (!isArrayLike(collection)) {\n return eachFunc(collection, iteratee);\n }\n var length = collection.length,\n index = fromRight ? length : -1,\n iterable = Object(collection);\n\n while ((fromRight ? index-- : ++index < length)) {\n if (iteratee(iterable[index], index, iterable) === false) {\n break;\n }\n }\n return collection;\n };\n }\n\n /**\n * Creates a base function for methods like `_.forIn` and `_.forOwn`.\n *\n * @private\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Function} Returns the new base function.\n */\n function createBaseFor(fromRight) {\n return function(object, iteratee, keysFunc) {\n var index = -1,\n iterable = Object(object),\n props = keysFunc(object),\n length = props.length;\n\n while (length--) {\n var key = props[fromRight ? length : ++index];\n if (iteratee(iterable[key], key, iterable) === false) {\n break;\n }\n }\n return object;\n };\n }\n\n /**\n * Creates a function that wraps `func` to invoke it with the optional `this`\n * binding of `thisArg`.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @param {*} [thisArg] The `this` binding of `func`.\n * @returns {Function} Returns the new wrapped function.\n */\n function createBind(func, bitmask, thisArg) {\n var isBind = bitmask & WRAP_BIND_FLAG,\n Ctor = createCtor(func);\n\n function wrapper() {\n var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n return fn.apply(isBind ? thisArg : this, arguments);\n }\n return wrapper;\n }\n\n /**\n * Creates a function like `_.lowerFirst`.\n *\n * @private\n * @param {string} methodName The name of the `String` case method to use.\n * @returns {Function} Returns the new case function.\n */\n function createCaseFirst(methodName) {\n return function(string) {\n string = toString(string);\n\n var strSymbols = hasUnicode(string)\n ? stringToArray(string)\n : undefined;\n\n var chr = strSymbols\n ? strSymbols[0]\n : string.charAt(0);\n\n var trailing = strSymbols\n ? castSlice(strSymbols, 1).join('')\n : string.slice(1);\n\n return chr[methodName]() + trailing;\n };\n }\n\n /**\n * Creates a function like `_.camelCase`.\n *\n * @private\n * @param {Function} callback The function to combine each word.\n * @returns {Function} Returns the new compounder function.\n */\n function createCompounder(callback) {\n return function(string) {\n return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');\n };\n }\n\n /**\n * Creates a function that produces an instance of `Ctor` regardless of\n * whether it was invoked as part of a `new` expression or by `call` or `apply`.\n *\n * @private\n * @param {Function} Ctor The constructor to wrap.\n * @returns {Function} Returns the new wrapped function.\n */\n function createCtor(Ctor) {\n return function() {\n // Use a `switch` statement to work with class constructors. See\n // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist\n // for more details.\n var args = arguments;\n switch (args.length) {\n case 0: return new Ctor;\n case 1: return new Ctor(args[0]);\n case 2: return new Ctor(args[0], args[1]);\n case 3: return new Ctor(args[0], args[1], args[2]);\n case 4: return new Ctor(args[0], args[1], args[2], args[3]);\n case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);\n case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);\n case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);\n }\n var thisBinding = baseCreate(Ctor.prototype),\n result = Ctor.apply(thisBinding, args);\n\n // Mimic the constructor's `return` behavior.\n // See https://es5.github.io/#x13.2.2 for more details.\n return isObject(result) ? result : thisBinding;\n };\n }\n\n /**\n * Creates a function that wraps `func` to enable currying.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @param {number} arity The arity of `func`.\n * @returns {Function} Returns the new wrapped function.\n */\n function createCurry(func, bitmask, arity) {\n var Ctor = createCtor(func);\n\n function wrapper() {\n var length = arguments.length,\n args = Array(length),\n index = length,\n placeholder = getHolder(wrapper);\n\n while (index--) {\n args[index] = arguments[index];\n }\n var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)\n ? []\n : replaceHolders(args, placeholder);\n\n length -= holders.length;\n if (length < arity) {\n return createRecurry(\n func, bitmask, createHybrid, wrapper.placeholder, undefined,\n args, holders, undefined, undefined, arity - length);\n }\n var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n return apply(fn, this, args);\n }\n return wrapper;\n }\n\n /**\n * Creates a `_.find` or `_.findLast` function.\n *\n * @private\n * @param {Function} findIndexFunc The function to find the collection index.\n * @returns {Function} Returns the new find function.\n */\n function createFind(findIndexFunc) {\n return function(collection, predicate, fromIndex) {\n var iterable = Object(collection);\n if (!isArrayLike(collection)) {\n var iteratee = getIteratee(predicate, 3);\n collection = keys(collection);\n predicate = function(key) { return iteratee(iterable[key], key, iterable); };\n }\n var index = findIndexFunc(collection, predicate, fromIndex);\n return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;\n };\n }\n\n /**\n * Creates a `_.flow` or `_.flowRight` function.\n *\n * @private\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Function} Returns the new flow function.\n */\n function createFlow(fromRight) {\n return flatRest(function(funcs) {\n var length = funcs.length,\n index = length,\n prereq = LodashWrapper.prototype.thru;\n\n if (fromRight) {\n funcs.reverse();\n }\n while (index--) {\n var func = funcs[index];\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n if (prereq && !wrapper && getFuncName(func) == 'wrapper') {\n var wrapper = new LodashWrapper([], true);\n }\n }\n index = wrapper ? index : length;\n while (++index < length) {\n func = funcs[index];\n\n var funcName = getFuncName(func),\n data = funcName == 'wrapper' ? getData(func) : undefined;\n\n if (data && isLaziable(data[0]) &&\n data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&\n !data[4].length && data[9] == 1\n ) {\n wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);\n } else {\n wrapper = (func.length == 1 && isLaziable(func))\n ? wrapper[funcName]()\n : wrapper.thru(func);\n }\n }\n return function() {\n var args = arguments,\n value = args[0];\n\n if (wrapper && args.length == 1 && isArray(value)) {\n return wrapper.plant(value).value();\n }\n var index = 0,\n result = length ? funcs[index].apply(this, args) : value;\n\n while (++index < length) {\n result = funcs[index].call(this, result);\n }\n return result;\n };\n });\n }\n\n /**\n * Creates a function that wraps `func` to invoke it with optional `this`\n * binding of `thisArg`, partial application, and currying.\n *\n * @private\n * @param {Function|string} func The function or method name to wrap.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @param {*} [thisArg] The `this` binding of `func`.\n * @param {Array} [partials] The arguments to prepend to those provided to\n * the new function.\n * @param {Array} [holders] The `partials` placeholder indexes.\n * @param {Array} [partialsRight] The arguments to append to those provided\n * to the new function.\n * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.\n * @param {Array} [argPos] The argument positions of the new function.\n * @param {number} [ary] The arity cap of `func`.\n * @param {number} [arity] The arity of `func`.\n * @returns {Function} Returns the new wrapped function.\n */\n function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {\n var isAry = bitmask & WRAP_ARY_FLAG,\n isBind = bitmask & WRAP_BIND_FLAG,\n isBindKey = bitmask & WRAP_BIND_KEY_FLAG,\n isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),\n isFlip = bitmask & WRAP_FLIP_FLAG,\n Ctor = isBindKey ? undefined : createCtor(func);\n\n function wrapper() {\n var length = arguments.length,\n args = Array(length),\n index = length;\n\n while (index--) {\n args[index] = arguments[index];\n }\n if (isCurried) {\n var placeholder = getHolder(wrapper),\n holdersCount = countHolders(args, placeholder);\n }\n if (partials) {\n args = composeArgs(args, partials, holders, isCurried);\n }\n if (partialsRight) {\n args = composeArgsRight(args, partialsRight, holdersRight, isCurried);\n }\n length -= holdersCount;\n if (isCurried && length < arity) {\n var newHolders = replaceHolders(args, placeholder);\n return createRecurry(\n func, bitmask, createHybrid, wrapper.placeholder, thisArg,\n args, newHolders, argPos, ary, arity - length\n );\n }\n var thisBinding = isBind ? thisArg : this,\n fn = isBindKey ? thisBinding[func] : func;\n\n length = args.length;\n if (argPos) {\n args = reorder(args, argPos);\n } else if (isFlip && length > 1) {\n args.reverse();\n }\n if (isAry && ary < length) {\n args.length = ary;\n }\n if (this && this !== root && this instanceof wrapper) {\n fn = Ctor || createCtor(fn);\n }\n return fn.apply(thisBinding, args);\n }\n return wrapper;\n }\n\n /**\n * Creates a function like `_.invertBy`.\n *\n * @private\n * @param {Function} setter The function to set accumulator values.\n * @param {Function} toIteratee The function to resolve iteratees.\n * @returns {Function} Returns the new inverter function.\n */\n function createInverter(setter, toIteratee) {\n return function(object, iteratee) {\n return baseInverter(object, setter, toIteratee(iteratee), {});\n };\n }\n\n /**\n * Creates a function that performs a mathematical operation on two values.\n *\n * @private\n * @param {Function} operator The function to perform the operation.\n * @param {number} [defaultValue] The value used for `undefined` arguments.\n * @returns {Function} Returns the new mathematical operation function.\n */\n function createMathOperation(operator, defaultValue) {\n return function(value, other) {\n var result;\n if (value === undefined && other === undefined) {\n return defaultValue;\n }\n if (value !== undefined) {\n result = value;\n }\n if (other !== undefined) {\n if (result === undefined) {\n return other;\n }\n if (typeof value == 'string' || typeof other == 'string') {\n value = baseToString(value);\n other = baseToString(other);\n } else {\n value = baseToNumber(value);\n other = baseToNumber(other);\n }\n result = operator(value, other);\n }\n return result;\n };\n }\n\n /**\n * Creates a function like `_.over`.\n *\n * @private\n * @param {Function} arrayFunc The function to iterate over iteratees.\n * @returns {Function} Returns the new over function.\n */\n function createOver(arrayFunc) {\n return flatRest(function(iteratees) {\n iteratees = arrayMap(iteratees, baseUnary(getIteratee()));\n return baseRest(function(args) {\n var thisArg = this;\n return arrayFunc(iteratees, function(iteratee) {\n return apply(iteratee, thisArg, args);\n });\n });\n });\n }\n\n /**\n * Creates the padding for `string` based on `length`. The `chars` string\n * is truncated if the number of characters exceeds `length`.\n *\n * @private\n * @param {number} length The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padding for `string`.\n */\n function createPadding(length, chars) {\n chars = chars === undefined ? ' ' : baseToString(chars);\n\n var charsLength = chars.length;\n if (charsLength < 2) {\n return charsLength ? baseRepeat(chars, length) : chars;\n }\n var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));\n return hasUnicode(chars)\n ? castSlice(stringToArray(result), 0, length).join('')\n : result.slice(0, length);\n }\n\n /**\n * Creates a function that wraps `func` to invoke it with the `this` binding\n * of `thisArg` and `partials` prepended to the arguments it receives.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @param {*} thisArg The `this` binding of `func`.\n * @param {Array} partials The arguments to prepend to those provided to\n * the new function.\n * @returns {Function} Returns the new wrapped function.\n */\n function createPartial(func, bitmask, thisArg, partials) {\n var isBind = bitmask & WRAP_BIND_FLAG,\n Ctor = createCtor(func);\n\n function wrapper() {\n var argsIndex = -1,\n argsLength = arguments.length,\n leftIndex = -1,\n leftLength = partials.length,\n args = Array(leftLength + argsLength),\n fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n\n while (++leftIndex < leftLength) {\n args[leftIndex] = partials[leftIndex];\n }\n while (argsLength--) {\n args[leftIndex++] = arguments[++argsIndex];\n }\n return apply(fn, isBind ? thisArg : this, args);\n }\n return wrapper;\n }\n\n /**\n * Creates a `_.range` or `_.rangeRight` function.\n *\n * @private\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Function} Returns the new range function.\n */\n function createRange(fromRight) {\n return function(start, end, step) {\n if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {\n end = step = undefined;\n }\n // Ensure the sign of `-0` is preserved.\n start = toFinite(start);\n if (end === undefined) {\n end = start;\n start = 0;\n } else {\n end = toFinite(end);\n }\n step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);\n return baseRange(start, end, step, fromRight);\n };\n }\n\n /**\n * Creates a function that performs a relational operation on two values.\n *\n * @private\n * @param {Function} operator The function to perform the operation.\n * @returns {Function} Returns the new relational operation function.\n */\n function createRelationalOperation(operator) {\n return function(value, other) {\n if (!(typeof value == 'string' && typeof other == 'string')) {\n value = toNumber(value);\n other = toNumber(other);\n }\n return operator(value, other);\n };\n }\n\n /**\n * Creates a function that wraps `func` to continue currying.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @param {Function} wrapFunc The function to create the `func` wrapper.\n * @param {*} placeholder The placeholder value.\n * @param {*} [thisArg] The `this` binding of `func`.\n * @param {Array} [partials] The arguments to prepend to those provided to\n * the new function.\n * @param {Array} [holders] The `partials` placeholder indexes.\n * @param {Array} [argPos] The argument positions of the new function.\n * @param {number} [ary] The arity cap of `func`.\n * @param {number} [arity] The arity of `func`.\n * @returns {Function} Returns the new wrapped function.\n */\n function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {\n var isCurry = bitmask & WRAP_CURRY_FLAG,\n newHolders = isCurry ? holders : undefined,\n newHoldersRight = isCurry ? undefined : holders,\n newPartials = isCurry ? partials : undefined,\n newPartialsRight = isCurry ? undefined : partials;\n\n bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);\n bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);\n\n if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {\n bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);\n }\n var newData = [\n func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,\n newHoldersRight, argPos, ary, arity\n ];\n\n var result = wrapFunc.apply(undefined, newData);\n if (isLaziable(func)) {\n setData(result, newData);\n }\n result.placeholder = placeholder;\n return setWrapToString(result, func, bitmask);\n }\n\n /**\n * Creates a function like `_.round`.\n *\n * @private\n * @param {string} methodName The name of the `Math` method to use when rounding.\n * @returns {Function} Returns the new round function.\n */\n function createRound(methodName) {\n var func = Math[methodName];\n return function(number, precision) {\n number = toNumber(number);\n precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);\n if (precision && nativeIsFinite(number)) {\n // Shift with exponential notation to avoid floating-point issues.\n // See [MDN](https://mdn.io/round#Examples) for more details.\n var pair = (toString(number) + 'e').split('e'),\n value = func(pair[0] + 'e' + (+pair[1] + precision));\n\n pair = (toString(value) + 'e').split('e');\n return +(pair[0] + 'e' + (+pair[1] - precision));\n }\n return func(number);\n };\n }\n\n /**\n * Creates a set object of `values`.\n *\n * @private\n * @param {Array} values The values to add to the set.\n * @returns {Object} Returns the new set.\n */\n var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {\n return new Set(values);\n };\n\n /**\n * Creates a `_.toPairs` or `_.toPairsIn` function.\n *\n * @private\n * @param {Function} keysFunc The function to get the keys of a given object.\n * @returns {Function} Returns the new pairs function.\n */\n function createToPairs(keysFunc) {\n return function(object) {\n var tag = getTag(object);\n if (tag == mapTag) {\n return mapToArray(object);\n }\n if (tag == setTag) {\n return setToPairs(object);\n }\n return baseToPairs(object, keysFunc(object));\n };\n }\n\n /**\n * Creates a function that either curries or invokes `func` with optional\n * `this` binding and partially applied arguments.\n *\n * @private\n * @param {Function|string} func The function or method name to wrap.\n * @param {number} bitmask The bitmask flags.\n * 1 - `_.bind`\n * 2 - `_.bindKey`\n * 4 - `_.curry` or `_.curryRight` of a bound function\n * 8 - `_.curry`\n * 16 - `_.curryRight`\n * 32 - `_.partial`\n * 64 - `_.partialRight`\n * 128 - `_.rearg`\n * 256 - `_.ary`\n * 512 - `_.flip`\n * @param {*} [thisArg] The `this` binding of `func`.\n * @param {Array} [partials] The arguments to be partially applied.\n * @param {Array} [holders] The `partials` placeholder indexes.\n * @param {Array} [argPos] The argument positions of the new function.\n * @param {number} [ary] The arity cap of `func`.\n * @param {number} [arity] The arity of `func`.\n * @returns {Function} Returns the new wrapped function.\n */\n function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {\n var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;\n if (!isBindKey && typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n var length = partials ? partials.length : 0;\n if (!length) {\n bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);\n partials = holders = undefined;\n }\n ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);\n arity = arity === undefined ? arity : toInteger(arity);\n length -= holders ? holders.length : 0;\n\n if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {\n var partialsRight = partials,\n holdersRight = holders;\n\n partials = holders = undefined;\n }\n var data = isBindKey ? undefined : getData(func);\n\n var newData = [\n func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,\n argPos, ary, arity\n ];\n\n if (data) {\n mergeData(newData, data);\n }\n func = newData[0];\n bitmask = newData[1];\n thisArg = newData[2];\n partials = newData[3];\n holders = newData[4];\n arity = newData[9] = newData[9] === undefined\n ? (isBindKey ? 0 : func.length)\n : nativeMax(newData[9] - length, 0);\n\n if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {\n bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);\n }\n if (!bitmask || bitmask == WRAP_BIND_FLAG) {\n var result = createBind(func, bitmask, thisArg);\n } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {\n result = createCurry(func, bitmask, arity);\n } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {\n result = createPartial(func, bitmask, thisArg, partials);\n } else {\n result = createHybrid.apply(undefined, newData);\n }\n var setter = data ? baseSetData : setData;\n return setWrapToString(setter(result, newData), func, bitmask);\n }\n\n /**\n * Used by `_.defaults` to customize its `_.assignIn` use to assign properties\n * of source objects to the destination object for all destination properties\n * that resolve to `undefined`.\n *\n * @private\n * @param {*} objValue The destination value.\n * @param {*} srcValue The source value.\n * @param {string} key The key of the property to assign.\n * @param {Object} object The parent object of `objValue`.\n * @returns {*} Returns the value to assign.\n */\n function customDefaultsAssignIn(objValue, srcValue, key, object) {\n if (objValue === undefined ||\n (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {\n return srcValue;\n }\n return objValue;\n }\n\n /**\n * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source\n * objects into destination objects that are passed thru.\n *\n * @private\n * @param {*} objValue The destination value.\n * @param {*} srcValue The source value.\n * @param {string} key The key of the property to merge.\n * @param {Object} object The parent object of `objValue`.\n * @param {Object} source The parent object of `srcValue`.\n * @param {Object} [stack] Tracks traversed source values and their merged\n * counterparts.\n * @returns {*} Returns the value to assign.\n */\n function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {\n if (isObject(objValue) && isObject(srcValue)) {\n // Recursively merge objects and arrays (susceptible to call stack limits).\n stack.set(srcValue, objValue);\n baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);\n stack['delete'](srcValue);\n }\n return objValue;\n }\n\n /**\n * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain\n * objects.\n *\n * @private\n * @param {*} value The value to inspect.\n * @param {string} key The key of the property to inspect.\n * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.\n */\n function customOmitClone(value) {\n return isPlainObject(value) ? undefined : value;\n }\n\n /**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\n function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Check that cyclic values are equal.\n var arrStacked = stack.get(array);\n var othStacked = stack.get(other);\n if (arrStacked && othStacked) {\n return arrStacked == other && othStacked == array;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n }\n\n /**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\n function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n }\n\n /**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\n function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Check that cyclic values are equal.\n var objStacked = stack.get(object);\n var othStacked = stack.get(other);\n if (objStacked && othStacked) {\n return objStacked == other && othStacked == object;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n }\n\n /**\n * A specialized version of `baseRest` which flattens the rest array.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @returns {Function} Returns the new function.\n */\n function flatRest(func) {\n return setToString(overRest(func, undefined, flatten), func + '');\n }\n\n /**\n * Creates an array of own enumerable property names and symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\n function getAllKeys(object) {\n return baseGetAllKeys(object, keys, getSymbols);\n }\n\n /**\n * Creates an array of own and inherited enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\n function getAllKeysIn(object) {\n return baseGetAllKeys(object, keysIn, getSymbolsIn);\n }\n\n /**\n * Gets metadata for `func`.\n *\n * @private\n * @param {Function} func The function to query.\n * @returns {*} Returns the metadata for `func`.\n */\n var getData = !metaMap ? noop : function(func) {\n return metaMap.get(func);\n };\n\n /**\n * Gets the name of `func`.\n *\n * @private\n * @param {Function} func The function to query.\n * @returns {string} Returns the function name.\n */\n function getFuncName(func) {\n var result = (func.name + ''),\n array = realNames[result],\n length = hasOwnProperty.call(realNames, result) ? array.length : 0;\n\n while (length--) {\n var data = array[length],\n otherFunc = data.func;\n if (otherFunc == null || otherFunc == func) {\n return data.name;\n }\n }\n return result;\n }\n\n /**\n * Gets the argument placeholder value for `func`.\n *\n * @private\n * @param {Function} func The function to inspect.\n * @returns {*} Returns the placeholder value.\n */\n function getHolder(func) {\n var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;\n return object.placeholder;\n }\n\n /**\n * Gets the appropriate \"iteratee\" function. If `_.iteratee` is customized,\n * this function returns the custom method, otherwise it returns `baseIteratee`.\n * If arguments are provided, the chosen function is invoked with them and\n * its result is returned.\n *\n * @private\n * @param {*} [value] The value to convert to an iteratee.\n * @param {number} [arity] The arity of the created iteratee.\n * @returns {Function} Returns the chosen function or its result.\n */\n function getIteratee() {\n var result = lodash.iteratee || iteratee;\n result = result === iteratee ? baseIteratee : result;\n return arguments.length ? result(arguments[0], arguments[1]) : result;\n }\n\n /**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\n function getMapData(map, key) {\n var data = map.__data__;\n return isKeyable(key)\n ? data[typeof key == 'string' ? 'string' : 'hash']\n : data.map;\n }\n\n /**\n * Gets the property names, values, and compare flags of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the match data of `object`.\n */\n function getMatchData(object) {\n var result = keys(object),\n length = result.length;\n\n while (length--) {\n var key = result[length],\n value = object[key];\n\n result[length] = [key, value, isStrictComparable(value)];\n }\n return result;\n }\n\n /**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\n function getNative(object, key) {\n var value = getValue(object, key);\n return baseIsNative(value) ? value : undefined;\n }\n\n /**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\n function getRawTag(value) {\n var isOwn = hasOwnProperty.call(value, symToStringTag),\n tag = value[symToStringTag];\n\n try {\n value[symToStringTag] = undefined;\n var unmasked = true;\n } catch (e) {}\n\n var result = nativeObjectToString.call(value);\n if (unmasked) {\n if (isOwn) {\n value[symToStringTag] = tag;\n } else {\n delete value[symToStringTag];\n }\n }\n return result;\n }\n\n /**\n * Creates an array of the own enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\n var getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n if (object == null) {\n return [];\n }\n object = Object(object);\n return arrayFilter(nativeGetSymbols(object), function(symbol) {\n return propertyIsEnumerable.call(object, symbol);\n });\n };\n\n /**\n * Creates an array of the own and inherited enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\n var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {\n var result = [];\n while (object) {\n arrayPush(result, getSymbols(object));\n object = getPrototype(object);\n }\n return result;\n };\n\n /**\n * Gets the `toStringTag` of `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\n var getTag = baseGetTag;\n\n // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\n if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n (Map && getTag(new Map) != mapTag) ||\n (Promise && getTag(Promise.resolve()) != promiseTag) ||\n (Set && getTag(new Set) != setTag) ||\n (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n getTag = function(value) {\n var result = baseGetTag(value),\n Ctor = result == objectTag ? value.constructor : undefined,\n ctorString = Ctor ? toSource(Ctor) : '';\n\n if (ctorString) {\n switch (ctorString) {\n case dataViewCtorString: return dataViewTag;\n case mapCtorString: return mapTag;\n case promiseCtorString: return promiseTag;\n case setCtorString: return setTag;\n case weakMapCtorString: return weakMapTag;\n }\n }\n return result;\n };\n }\n\n /**\n * Gets the view, applying any `transforms` to the `start` and `end` positions.\n *\n * @private\n * @param {number} start The start of the view.\n * @param {number} end The end of the view.\n * @param {Array} transforms The transformations to apply to the view.\n * @returns {Object} Returns an object containing the `start` and `end`\n * positions of the view.\n */\n function getView(start, end, transforms) {\n var index = -1,\n length = transforms.length;\n\n while (++index < length) {\n var data = transforms[index],\n size = data.size;\n\n switch (data.type) {\n case 'drop': start += size; break;\n case 'dropRight': end -= size; break;\n case 'take': end = nativeMin(end, start + size); break;\n case 'takeRight': start = nativeMax(start, end - size); break;\n }\n }\n return { 'start': start, 'end': end };\n }\n\n /**\n * Extracts wrapper details from the `source` body comment.\n *\n * @private\n * @param {string} source The source to inspect.\n * @returns {Array} Returns the wrapper details.\n */\n function getWrapDetails(source) {\n var match = source.match(reWrapDetails);\n return match ? match[1].split(reSplitDetails) : [];\n }\n\n /**\n * Checks if `path` exists on `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array|string} path The path to check.\n * @param {Function} hasFunc The function to check properties.\n * @returns {boolean} Returns `true` if `path` exists, else `false`.\n */\n function hasPath(object, path, hasFunc) {\n path = castPath(path, object);\n\n var index = -1,\n length = path.length,\n result = false;\n\n while (++index < length) {\n var key = toKey(path[index]);\n if (!(result = object != null && hasFunc(object, key))) {\n break;\n }\n object = object[key];\n }\n if (result || ++index != length) {\n return result;\n }\n length = object == null ? 0 : object.length;\n return !!length && isLength(length) && isIndex(key, length) &&\n (isArray(object) || isArguments(object));\n }\n\n /**\n * Initializes an array clone.\n *\n * @private\n * @param {Array} array The array to clone.\n * @returns {Array} Returns the initialized clone.\n */\n function initCloneArray(array) {\n var length = array.length,\n result = new array.constructor(length);\n\n // Add properties assigned by `RegExp#exec`.\n if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {\n result.index = array.index;\n result.input = array.input;\n }\n return result;\n }\n\n /**\n * Initializes an object clone.\n *\n * @private\n * @param {Object} object The object to clone.\n * @returns {Object} Returns the initialized clone.\n */\n function initCloneObject(object) {\n return (typeof object.constructor == 'function' && !isPrototype(object))\n ? baseCreate(getPrototype(object))\n : {};\n }\n\n /**\n * Initializes an object clone based on its `toStringTag`.\n *\n * **Note:** This function only supports cloning values with tags of\n * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.\n *\n * @private\n * @param {Object} object The object to clone.\n * @param {string} tag The `toStringTag` of the object to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the initialized clone.\n */\n function initCloneByTag(object, tag, isDeep) {\n var Ctor = object.constructor;\n switch (tag) {\n case arrayBufferTag:\n return cloneArrayBuffer(object);\n\n case boolTag:\n case dateTag:\n return new Ctor(+object);\n\n case dataViewTag:\n return cloneDataView(object, isDeep);\n\n case float32Tag: case float64Tag:\n case int8Tag: case int16Tag: case int32Tag:\n case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:\n return cloneTypedArray(object, isDeep);\n\n case mapTag:\n return new Ctor;\n\n case numberTag:\n case stringTag:\n return new Ctor(object);\n\n case regexpTag:\n return cloneRegExp(object);\n\n case setTag:\n return new Ctor;\n\n case symbolTag:\n return cloneSymbol(object);\n }\n }\n\n /**\n * Inserts wrapper `details` in a comment at the top of the `source` body.\n *\n * @private\n * @param {string} source The source to modify.\n * @returns {Array} details The details to insert.\n * @returns {string} Returns the modified source.\n */\n function insertWrapDetails(source, details) {\n var length = details.length;\n if (!length) {\n return source;\n }\n var lastIndex = length - 1;\n details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];\n details = details.join(length > 2 ? ', ' : ' ');\n return source.replace(reWrapComment, '{\\n/* [wrapped with ' + details + '] */\\n');\n }\n\n /**\n * Checks if `value` is a flattenable `arguments` object or array.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.\n */\n function isFlattenable(value) {\n return isArray(value) || isArguments(value) ||\n !!(spreadableSymbol && value && value[spreadableSymbol]);\n }\n\n /**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\n function isIndex(value, length) {\n var type = typeof value;\n length = length == null ? MAX_SAFE_INTEGER : length;\n\n return !!length &&\n (type == 'number' ||\n (type != 'symbol' && reIsUint.test(value))) &&\n (value > -1 && value % 1 == 0 && value < length);\n }\n\n /**\n * Checks if the given arguments are from an iteratee call.\n *\n * @private\n * @param {*} value The potential iteratee value argument.\n * @param {*} index The potential iteratee index or key argument.\n * @param {*} object The potential iteratee object argument.\n * @returns {boolean} Returns `true` if the arguments are from an iteratee call,\n * else `false`.\n */\n function isIterateeCall(value, index, object) {\n if (!isObject(object)) {\n return false;\n }\n var type = typeof index;\n if (type == 'number'\n ? (isArrayLike(object) && isIndex(index, object.length))\n : (type == 'string' && index in object)\n ) {\n return eq(object[index], value);\n }\n return false;\n }\n\n /**\n * Checks if `value` is a property name and not a property path.\n *\n * @private\n * @param {*} value The value to check.\n * @param {Object} [object] The object to query keys on.\n * @returns {boolean} Returns `true` if `value` is a property name, else `false`.\n */\n function isKey(value, object) {\n if (isArray(value)) {\n return false;\n }\n var type = typeof value;\n if (type == 'number' || type == 'symbol' || type == 'boolean' ||\n value == null || isSymbol(value)) {\n return true;\n }\n return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||\n (object != null && value in Object(object));\n }\n\n /**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\n function isKeyable(value) {\n var type = typeof value;\n return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n ? (value !== '__proto__')\n : (value === null);\n }\n\n /**\n * Checks if `func` has a lazy counterpart.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` has a lazy counterpart,\n * else `false`.\n */\n function isLaziable(func) {\n var funcName = getFuncName(func),\n other = lodash[funcName];\n\n if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {\n return false;\n }\n if (func === other) {\n return true;\n }\n var data = getData(other);\n return !!data && func === data[0];\n }\n\n /**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\n function isMasked(func) {\n return !!maskSrcKey && (maskSrcKey in func);\n }\n\n /**\n * Checks if `func` is capable of being masked.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `func` is maskable, else `false`.\n */\n var isMaskable = coreJsData ? isFunction : stubFalse;\n\n /**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\n function isPrototype(value) {\n var Ctor = value && value.constructor,\n proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n return value === proto;\n }\n\n /**\n * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` if suitable for strict\n * equality comparisons, else `false`.\n */\n function isStrictComparable(value) {\n return value === value && !isObject(value);\n }\n\n /**\n * A specialized version of `matchesProperty` for source values suitable\n * for strict equality comparisons, i.e. `===`.\n *\n * @private\n * @param {string} key The key of the property to get.\n * @param {*} srcValue The value to match.\n * @returns {Function} Returns the new spec function.\n */\n function matchesStrictComparable(key, srcValue) {\n return function(object) {\n if (object == null) {\n return false;\n }\n return object[key] === srcValue &&\n (srcValue !== undefined || (key in Object(object)));\n };\n }\n\n /**\n * A specialized version of `_.memoize` which clears the memoized function's\n * cache when it exceeds `MAX_MEMOIZE_SIZE`.\n *\n * @private\n * @param {Function} func The function to have its output memoized.\n * @returns {Function} Returns the new memoized function.\n */\n function memoizeCapped(func) {\n var result = memoize(func, function(key) {\n if (cache.size === MAX_MEMOIZE_SIZE) {\n cache.clear();\n }\n return key;\n });\n\n var cache = result.cache;\n return result;\n }\n\n /**\n * Merges the function metadata of `source` into `data`.\n *\n * Merging metadata reduces the number of wrappers used to invoke a function.\n * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`\n * may be applied regardless of execution order. Methods like `_.ary` and\n * `_.rearg` modify function arguments, making the order in which they are\n * executed important, preventing the merging of metadata. However, we make\n * an exception for a safe combined case where curried functions have `_.ary`\n * and or `_.rearg` applied.\n *\n * @private\n * @param {Array} data The destination metadata.\n * @param {Array} source The source metadata.\n * @returns {Array} Returns `data`.\n */\n function mergeData(data, source) {\n var bitmask = data[1],\n srcBitmask = source[1],\n newBitmask = bitmask | srcBitmask,\n isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);\n\n var isCombo =\n ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||\n ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||\n ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));\n\n // Exit early if metadata can't be merged.\n if (!(isCommon || isCombo)) {\n return data;\n }\n // Use source `thisArg` if available.\n if (srcBitmask & WRAP_BIND_FLAG) {\n data[2] = source[2];\n // Set when currying a bound function.\n newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;\n }\n // Compose partial arguments.\n var value = source[3];\n if (value) {\n var partials = data[3];\n data[3] = partials ? composeArgs(partials, value, source[4]) : value;\n data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];\n }\n // Compose partial right arguments.\n value = source[5];\n if (value) {\n partials = data[5];\n data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;\n data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];\n }\n // Use source `argPos` if available.\n value = source[7];\n if (value) {\n data[7] = value;\n }\n // Use source `ary` if it's smaller.\n if (srcBitmask & WRAP_ARY_FLAG) {\n data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);\n }\n // Use source `arity` if one is not provided.\n if (data[9] == null) {\n data[9] = source[9];\n }\n // Use source `func` and merge bitmasks.\n data[0] = source[0];\n data[1] = newBitmask;\n\n return data;\n }\n\n /**\n * This function is like\n * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * except that it includes inherited enumerable properties.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\n function nativeKeysIn(object) {\n var result = [];\n if (object != null) {\n for (var key in Object(object)) {\n result.push(key);\n }\n }\n return result;\n }\n\n /**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\n function objectToString(value) {\n return nativeObjectToString.call(value);\n }\n\n /**\n * A specialized version of `baseRest` which transforms the rest array.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @param {Function} transform The rest array transform.\n * @returns {Function} Returns the new function.\n */\n function overRest(func, start, transform) {\n start = nativeMax(start === undefined ? (func.length - 1) : start, 0);\n return function() {\n var args = arguments,\n index = -1,\n length = nativeMax(args.length - start, 0),\n array = Array(length);\n\n while (++index < length) {\n array[index] = args[start + index];\n }\n index = -1;\n var otherArgs = Array(start + 1);\n while (++index < start) {\n otherArgs[index] = args[index];\n }\n otherArgs[start] = transform(array);\n return apply(func, this, otherArgs);\n };\n }\n\n /**\n * Gets the parent value at `path` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array} path The path to get the parent value of.\n * @returns {*} Returns the parent value.\n */\n function parent(object, path) {\n return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));\n }\n\n /**\n * Reorder `array` according to the specified indexes where the element at\n * the first index is assigned as the first element, the element at\n * the second index is assigned as the second element, and so on.\n *\n * @private\n * @param {Array} array The array to reorder.\n * @param {Array} indexes The arranged array indexes.\n * @returns {Array} Returns `array`.\n */\n function reorder(array, indexes) {\n var arrLength = array.length,\n length = nativeMin(indexes.length, arrLength),\n oldArray = copyArray(array);\n\n while (length--) {\n var index = indexes[length];\n array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;\n }\n return array;\n }\n\n /**\n * Gets the value at `key`, unless `key` is \"__proto__\" or \"constructor\".\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\n function safeGet(object, key) {\n if (key === 'constructor' && typeof object[key] === 'function') {\n return;\n }\n\n if (key == '__proto__') {\n return;\n }\n\n return object[key];\n }\n\n /**\n * Sets metadata for `func`.\n *\n * **Note:** If this function becomes hot, i.e. is invoked a lot in a short\n * period of time, it will trip its breaker and transition to an identity\n * function to avoid garbage collection pauses in V8. See\n * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)\n * for more details.\n *\n * @private\n * @param {Function} func The function to associate metadata with.\n * @param {*} data The metadata.\n * @returns {Function} Returns `func`.\n */\n var setData = shortOut(baseSetData);\n\n /**\n * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).\n *\n * @private\n * @param {Function} func The function to delay.\n * @param {number} wait The number of milliseconds to delay invocation.\n * @returns {number|Object} Returns the timer id or timeout object.\n */\n var setTimeout = ctxSetTimeout || function(func, wait) {\n return root.setTimeout(func, wait);\n };\n\n /**\n * Sets the `toString` method of `func` to return `string`.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\n var setToString = shortOut(baseSetToString);\n\n /**\n * Sets the `toString` method of `wrapper` to mimic the source of `reference`\n * with wrapper details in a comment at the top of the source body.\n *\n * @private\n * @param {Function} wrapper The function to modify.\n * @param {Function} reference The reference function.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @returns {Function} Returns `wrapper`.\n */\n function setWrapToString(wrapper, reference, bitmask) {\n var source = (reference + '');\n return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));\n }\n\n /**\n * Creates a function that'll short out and invoke `identity` instead\n * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`\n * milliseconds.\n *\n * @private\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new shortable function.\n */\n function shortOut(func) {\n var count = 0,\n lastCalled = 0;\n\n return function() {\n var stamp = nativeNow(),\n remaining = HOT_SPAN - (stamp - lastCalled);\n\n lastCalled = stamp;\n if (remaining > 0) {\n if (++count >= HOT_COUNT) {\n return arguments[0];\n }\n } else {\n count = 0;\n }\n return func.apply(undefined, arguments);\n };\n }\n\n /**\n * A specialized version of `_.shuffle` which mutates and sets the size of `array`.\n *\n * @private\n * @param {Array} array The array to shuffle.\n * @param {number} [size=array.length] The size of `array`.\n * @returns {Array} Returns `array`.\n */\n function shuffleSelf(array, size) {\n var index = -1,\n length = array.length,\n lastIndex = length - 1;\n\n size = size === undefined ? length : size;\n while (++index < size) {\n var rand = baseRandom(index, lastIndex),\n value = array[rand];\n\n array[rand] = array[index];\n array[index] = value;\n }\n array.length = size;\n return array;\n }\n\n /**\n * Converts `string` to a property path array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the property path array.\n */\n var stringToPath = memoizeCapped(function(string) {\n var result = [];\n if (string.charCodeAt(0) === 46 /* . */) {\n result.push('');\n }\n string.replace(rePropName, function(match, number, quote, subString) {\n result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));\n });\n return result;\n });\n\n /**\n * Converts `value` to a string key if it's not a string or symbol.\n *\n * @private\n * @param {*} value The value to inspect.\n * @returns {string|symbol} Returns the key.\n */\n function toKey(value) {\n if (typeof value == 'string' || isSymbol(value)) {\n return value;\n }\n var result = (value + '');\n return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n }\n\n /**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to convert.\n * @returns {string} Returns the source code.\n */\n function toSource(func) {\n if (func != null) {\n try {\n return funcToString.call(func);\n } catch (e) {}\n try {\n return (func + '');\n } catch (e) {}\n }\n return '';\n }\n\n /**\n * Updates wrapper `details` based on `bitmask` flags.\n *\n * @private\n * @returns {Array} details The details to modify.\n * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n * @returns {Array} Returns `details`.\n */\n function updateWrapDetails(details, bitmask) {\n arrayEach(wrapFlags, function(pair) {\n var value = '_.' + pair[0];\n if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {\n details.push(value);\n }\n });\n return details.sort();\n }\n\n /**\n * Creates a clone of `wrapper`.\n *\n * @private\n * @param {Object} wrapper The wrapper to clone.\n * @returns {Object} Returns the cloned wrapper.\n */\n function wrapperClone(wrapper) {\n if (wrapper instanceof LazyWrapper) {\n return wrapper.clone();\n }\n var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);\n result.__actions__ = copyArray(wrapper.__actions__);\n result.__index__ = wrapper.__index__;\n result.__values__ = wrapper.__values__;\n return result;\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates an array of elements split into groups the length of `size`.\n * If `array` can't be split evenly, the final chunk will be the remaining\n * elements.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to process.\n * @param {number} [size=1] The length of each chunk\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the new array of chunks.\n * @example\n *\n * _.chunk(['a', 'b', 'c', 'd'], 2);\n * // => [['a', 'b'], ['c', 'd']]\n *\n * _.chunk(['a', 'b', 'c', 'd'], 3);\n * // => [['a', 'b', 'c'], ['d']]\n */\n function chunk(array, size, guard) {\n if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {\n size = 1;\n } else {\n size = nativeMax(toInteger(size), 0);\n }\n var length = array == null ? 0 : array.length;\n if (!length || size < 1) {\n return [];\n }\n var index = 0,\n resIndex = 0,\n result = Array(nativeCeil(length / size));\n\n while (index < length) {\n result[resIndex++] = baseSlice(array, index, (index += size));\n }\n return result;\n }\n\n /**\n * Creates an array with all falsey values removed. The values `false`, `null`,\n * `0`, `\"\"`, `undefined`, and `NaN` are falsey.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to compact.\n * @returns {Array} Returns the new array of filtered values.\n * @example\n *\n * _.compact([0, 1, false, 2, '', 3]);\n * // => [1, 2, 3]\n */\n function compact(array) {\n var index = -1,\n length = array == null ? 0 : array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (value) {\n result[resIndex++] = value;\n }\n }\n return result;\n }\n\n /**\n * Creates a new array concatenating `array` with any additional arrays\n * and/or values.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to concatenate.\n * @param {...*} [values] The values to concatenate.\n * @returns {Array} Returns the new concatenated array.\n * @example\n *\n * var array = [1];\n * var other = _.concat(array, 2, [3], [[4]]);\n *\n * console.log(other);\n * // => [1, 2, 3, [4]]\n *\n * console.log(array);\n * // => [1]\n */\n function concat() {\n var length = arguments.length;\n if (!length) {\n return [];\n }\n var args = Array(length - 1),\n array = arguments[0],\n index = length;\n\n while (index--) {\n args[index - 1] = arguments[index];\n }\n return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));\n }\n\n /**\n * Creates an array of `array` values not included in the other given arrays\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons. The order and references of result values are\n * determined by the first array.\n *\n * **Note:** Unlike `_.pullAll`, this method returns a new array.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {...Array} [values] The values to exclude.\n * @returns {Array} Returns the new array of filtered values.\n * @see _.without, _.xor\n * @example\n *\n * _.difference([2, 1], [2, 3]);\n * // => [1]\n */\n var difference = baseRest(function(array, values) {\n return isArrayLikeObject(array)\n ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))\n : [];\n });\n\n /**\n * This method is like `_.difference` except that it accepts `iteratee` which\n * is invoked for each element of `array` and `values` to generate the criterion\n * by which they're compared. The order and references of result values are\n * determined by the first array. The iteratee is invoked with one argument:\n * (value).\n *\n * **Note:** Unlike `_.pullAllBy`, this method returns a new array.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {...Array} [values] The values to exclude.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns the new array of filtered values.\n * @example\n *\n * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n * // => [1.2]\n *\n * // The `_.property` iteratee shorthand.\n * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');\n * // => [{ 'x': 2 }]\n */\n var differenceBy = baseRest(function(array, values) {\n var iteratee = last(values);\n if (isArrayLikeObject(iteratee)) {\n iteratee = undefined;\n }\n return isArrayLikeObject(array)\n ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))\n : [];\n });\n\n /**\n * This method is like `_.difference` except that it accepts `comparator`\n * which is invoked to compare elements of `array` to `values`. The order and\n * references of result values are determined by the first array. The comparator\n * is invoked with two arguments: (arrVal, othVal).\n *\n * **Note:** Unlike `_.pullAllWith`, this method returns a new array.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {...Array} [values] The values to exclude.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of filtered values.\n * @example\n *\n * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n *\n * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);\n * // => [{ 'x': 2, 'y': 1 }]\n */\n var differenceWith = baseRest(function(array, values) {\n var comparator = last(values);\n if (isArrayLikeObject(comparator)) {\n comparator = undefined;\n }\n return isArrayLikeObject(array)\n ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)\n : [];\n });\n\n /**\n * Creates a slice of `array` with `n` elements dropped from the beginning.\n *\n * @static\n * @memberOf _\n * @since 0.5.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {number} [n=1] The number of elements to drop.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.drop([1, 2, 3]);\n * // => [2, 3]\n *\n * _.drop([1, 2, 3], 2);\n * // => [3]\n *\n * _.drop([1, 2, 3], 5);\n * // => []\n *\n * _.drop([1, 2, 3], 0);\n * // => [1, 2, 3]\n */\n function drop(array, n, guard) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n n = (guard || n === undefined) ? 1 : toInteger(n);\n return baseSlice(array, n < 0 ? 0 : n, length);\n }\n\n /**\n * Creates a slice of `array` with `n` elements dropped from the end.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {number} [n=1] The number of elements to drop.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.dropRight([1, 2, 3]);\n * // => [1, 2]\n *\n * _.dropRight([1, 2, 3], 2);\n * // => [1]\n *\n * _.dropRight([1, 2, 3], 5);\n * // => []\n *\n * _.dropRight([1, 2, 3], 0);\n * // => [1, 2, 3]\n */\n function dropRight(array, n, guard) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n n = (guard || n === undefined) ? 1 : toInteger(n);\n n = length - n;\n return baseSlice(array, 0, n < 0 ? 0 : n);\n }\n\n /**\n * Creates a slice of `array` excluding elements dropped from the end.\n * Elements are dropped until `predicate` returns falsey. The predicate is\n * invoked with three arguments: (value, index, array).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': true },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': false }\n * ];\n *\n * _.dropRightWhile(users, function(o) { return !o.active; });\n * // => objects for ['barney']\n *\n * // The `_.matches` iteratee shorthand.\n * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });\n * // => objects for ['barney', 'fred']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.dropRightWhile(users, ['active', false]);\n * // => objects for ['barney']\n *\n * // The `_.property` iteratee shorthand.\n * _.dropRightWhile(users, 'active');\n * // => objects for ['barney', 'fred', 'pebbles']\n */\n function dropRightWhile(array, predicate) {\n return (array && array.length)\n ? baseWhile(array, getIteratee(predicate, 3), true, true)\n : [];\n }\n\n /**\n * Creates a slice of `array` excluding elements dropped from the beginning.\n * Elements are dropped until `predicate` returns falsey. The predicate is\n * invoked with three arguments: (value, index, array).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': false },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': true }\n * ];\n *\n * _.dropWhile(users, function(o) { return !o.active; });\n * // => objects for ['pebbles']\n *\n * // The `_.matches` iteratee shorthand.\n * _.dropWhile(users, { 'user': 'barney', 'active': false });\n * // => objects for ['fred', 'pebbles']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.dropWhile(users, ['active', false]);\n * // => objects for ['pebbles']\n *\n * // The `_.property` iteratee shorthand.\n * _.dropWhile(users, 'active');\n * // => objects for ['barney', 'fred', 'pebbles']\n */\n function dropWhile(array, predicate) {\n return (array && array.length)\n ? baseWhile(array, getIteratee(predicate, 3), true)\n : [];\n }\n\n /**\n * Fills elements of `array` with `value` from `start` up to, but not\n * including, `end`.\n *\n * **Note:** This method mutates `array`.\n *\n * @static\n * @memberOf _\n * @since 3.2.0\n * @category Array\n * @param {Array} array The array to fill.\n * @param {*} value The value to fill `array` with.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = [1, 2, 3];\n *\n * _.fill(array, 'a');\n * console.log(array);\n * // => ['a', 'a', 'a']\n *\n * _.fill(Array(3), 2);\n * // => [2, 2, 2]\n *\n * _.fill([4, 6, 8, 10], '*', 1, 3);\n * // => [4, '*', '*', 10]\n */\n function fill(array, value, start, end) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {\n start = 0;\n end = length;\n }\n return baseFill(array, value, start, end);\n }\n\n /**\n * This method is like `_.find` except that it returns the index of the first\n * element `predicate` returns truthy for instead of the element itself.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param {number} [fromIndex=0] The index to search from.\n * @returns {number} Returns the index of the found element, else `-1`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': false },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': true }\n * ];\n *\n * _.findIndex(users, function(o) { return o.user == 'barney'; });\n * // => 0\n *\n * // The `_.matches` iteratee shorthand.\n * _.findIndex(users, { 'user': 'fred', 'active': false });\n * // => 1\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findIndex(users, ['active', false]);\n * // => 0\n *\n * // The `_.property` iteratee shorthand.\n * _.findIndex(users, 'active');\n * // => 2\n */\n function findIndex(array, predicate, fromIndex) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return -1;\n }\n var index = fromIndex == null ? 0 : toInteger(fromIndex);\n if (index < 0) {\n index = nativeMax(length + index, 0);\n }\n return baseFindIndex(array, getIteratee(predicate, 3), index);\n }\n\n /**\n * This method is like `_.findIndex` except that it iterates over elements\n * of `collection` from right to left.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param {number} [fromIndex=array.length-1] The index to search from.\n * @returns {number} Returns the index of the found element, else `-1`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': true },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': false }\n * ];\n *\n * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });\n * // => 2\n *\n * // The `_.matches` iteratee shorthand.\n * _.findLastIndex(users, { 'user': 'barney', 'active': true });\n * // => 0\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findLastIndex(users, ['active', false]);\n * // => 2\n *\n * // The `_.property` iteratee shorthand.\n * _.findLastIndex(users, 'active');\n * // => 0\n */\n function findLastIndex(array, predicate, fromIndex) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return -1;\n }\n var index = length - 1;\n if (fromIndex !== undefined) {\n index = toInteger(fromIndex);\n index = fromIndex < 0\n ? nativeMax(length + index, 0)\n : nativeMin(index, length - 1);\n }\n return baseFindIndex(array, getIteratee(predicate, 3), index, true);\n }\n\n /**\n * Flattens `array` a single level deep.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to flatten.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * _.flatten([1, [2, [3, [4]], 5]]);\n * // => [1, 2, [3, [4]], 5]\n */\n function flatten(array) {\n var length = array == null ? 0 : array.length;\n return length ? baseFlatten(array, 1) : [];\n }\n\n /**\n * Recursively flattens `array`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to flatten.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * _.flattenDeep([1, [2, [3, [4]], 5]]);\n * // => [1, 2, 3, 4, 5]\n */\n function flattenDeep(array) {\n var length = array == null ? 0 : array.length;\n return length ? baseFlatten(array, INFINITY) : [];\n }\n\n /**\n * Recursively flatten `array` up to `depth` times.\n *\n * @static\n * @memberOf _\n * @since 4.4.0\n * @category Array\n * @param {Array} array The array to flatten.\n * @param {number} [depth=1] The maximum recursion depth.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * var array = [1, [2, [3, [4]], 5]];\n *\n * _.flattenDepth(array, 1);\n * // => [1, 2, [3, [4]], 5]\n *\n * _.flattenDepth(array, 2);\n * // => [1, 2, 3, [4], 5]\n */\n function flattenDepth(array, depth) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n depth = depth === undefined ? 1 : toInteger(depth);\n return baseFlatten(array, depth);\n }\n\n /**\n * The inverse of `_.toPairs`; this method returns an object composed\n * from key-value `pairs`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} pairs The key-value pairs.\n * @returns {Object} Returns the new object.\n * @example\n *\n * _.fromPairs([['a', 1], ['b', 2]]);\n * // => { 'a': 1, 'b': 2 }\n */\n function fromPairs(pairs) {\n var index = -1,\n length = pairs == null ? 0 : pairs.length,\n result = {};\n\n while (++index < length) {\n var pair = pairs[index];\n result[pair[0]] = pair[1];\n }\n return result;\n }\n\n /**\n * Gets the first element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @alias first\n * @category Array\n * @param {Array} array The array to query.\n * @returns {*} Returns the first element of `array`.\n * @example\n *\n * _.head([1, 2, 3]);\n * // => 1\n *\n * _.head([]);\n * // => undefined\n */\n function head(array) {\n return (array && array.length) ? array[0] : undefined;\n }\n\n /**\n * Gets the index at which the first occurrence of `value` is found in `array`\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons. If `fromIndex` is negative, it's used as the\n * offset from the end of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} [fromIndex=0] The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n * @example\n *\n * _.indexOf([1, 2, 1, 2], 2);\n * // => 1\n *\n * // Search from the `fromIndex`.\n * _.indexOf([1, 2, 1, 2], 2, 2);\n * // => 3\n */\n function indexOf(array, value, fromIndex) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return -1;\n }\n var index = fromIndex == null ? 0 : toInteger(fromIndex);\n if (index < 0) {\n index = nativeMax(length + index, 0);\n }\n return baseIndexOf(array, value, index);\n }\n\n /**\n * Gets all but the last element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.initial([1, 2, 3]);\n * // => [1, 2]\n */\n function initial(array) {\n var length = array == null ? 0 : array.length;\n return length ? baseSlice(array, 0, -1) : [];\n }\n\n /**\n * Creates an array of unique values that are included in all given arrays\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons. The order and references of result values are\n * determined by the first array.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @returns {Array} Returns the new array of intersecting values.\n * @example\n *\n * _.intersection([2, 1], [2, 3]);\n * // => [2]\n */\n var intersection = baseRest(function(arrays) {\n var mapped = arrayMap(arrays, castArrayLikeObject);\n return (mapped.length && mapped[0] === arrays[0])\n ? baseIntersection(mapped)\n : [];\n });\n\n /**\n * This method is like `_.intersection` except that it accepts `iteratee`\n * which is invoked for each element of each `arrays` to generate the criterion\n * by which they're compared. The order and references of result values are\n * determined by the first array. The iteratee is invoked with one argument:\n * (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns the new array of intersecting values.\n * @example\n *\n * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n * // => [2.1]\n *\n * // The `_.property` iteratee shorthand.\n * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n * // => [{ 'x': 1 }]\n */\n var intersectionBy = baseRest(function(arrays) {\n var iteratee = last(arrays),\n mapped = arrayMap(arrays, castArrayLikeObject);\n\n if (iteratee === last(mapped)) {\n iteratee = undefined;\n } else {\n mapped.pop();\n }\n return (mapped.length && mapped[0] === arrays[0])\n ? baseIntersection(mapped, getIteratee(iteratee, 2))\n : [];\n });\n\n /**\n * This method is like `_.intersection` except that it accepts `comparator`\n * which is invoked to compare elements of `arrays`. The order and references\n * of result values are determined by the first array. The comparator is\n * invoked with two arguments: (arrVal, othVal).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of intersecting values.\n * @example\n *\n * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n *\n * _.intersectionWith(objects, others, _.isEqual);\n * // => [{ 'x': 1, 'y': 2 }]\n */\n var intersectionWith = baseRest(function(arrays) {\n var comparator = last(arrays),\n mapped = arrayMap(arrays, castArrayLikeObject);\n\n comparator = typeof comparator == 'function' ? comparator : undefined;\n if (comparator) {\n mapped.pop();\n }\n return (mapped.length && mapped[0] === arrays[0])\n ? baseIntersection(mapped, undefined, comparator)\n : [];\n });\n\n /**\n * Converts all elements in `array` into a string separated by `separator`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to convert.\n * @param {string} [separator=','] The element separator.\n * @returns {string} Returns the joined string.\n * @example\n *\n * _.join(['a', 'b', 'c'], '~');\n * // => 'a~b~c'\n */\n function join(array, separator) {\n return array == null ? '' : nativeJoin.call(array, separator);\n }\n\n /**\n * Gets the last element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {*} Returns the last element of `array`.\n * @example\n *\n * _.last([1, 2, 3]);\n * // => 3\n */\n function last(array) {\n var length = array == null ? 0 : array.length;\n return length ? array[length - 1] : undefined;\n }\n\n /**\n * This method is like `_.indexOf` except that it iterates over elements of\n * `array` from right to left.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} [fromIndex=array.length-1] The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n * @example\n *\n * _.lastIndexOf([1, 2, 1, 2], 2);\n * // => 3\n *\n * // Search from the `fromIndex`.\n * _.lastIndexOf([1, 2, 1, 2], 2, 2);\n * // => 1\n */\n function lastIndexOf(array, value, fromIndex) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return -1;\n }\n var index = length;\n if (fromIndex !== undefined) {\n index = toInteger(fromIndex);\n index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);\n }\n return value === value\n ? strictLastIndexOf(array, value, index)\n : baseFindIndex(array, baseIsNaN, index, true);\n }\n\n /**\n * Gets the element at index `n` of `array`. If `n` is negative, the nth\n * element from the end is returned.\n *\n * @static\n * @memberOf _\n * @since 4.11.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {number} [n=0] The index of the element to return.\n * @returns {*} Returns the nth element of `array`.\n * @example\n *\n * var array = ['a', 'b', 'c', 'd'];\n *\n * _.nth(array, 1);\n * // => 'b'\n *\n * _.nth(array, -2);\n * // => 'c';\n */\n function nth(array, n) {\n return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;\n }\n\n /**\n * Removes all given values from `array` using\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`\n * to remove elements from an array by predicate.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {...*} [values] The values to remove.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = ['a', 'b', 'c', 'a', 'b', 'c'];\n *\n * _.pull(array, 'a', 'c');\n * console.log(array);\n * // => ['b', 'b']\n */\n var pull = baseRest(pullAll);\n\n /**\n * This method is like `_.pull` except that it accepts an array of values to remove.\n *\n * **Note:** Unlike `_.difference`, this method mutates `array`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {Array} values The values to remove.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = ['a', 'b', 'c', 'a', 'b', 'c'];\n *\n * _.pullAll(array, ['a', 'c']);\n * console.log(array);\n * // => ['b', 'b']\n */\n function pullAll(array, values) {\n return (array && array.length && values && values.length)\n ? basePullAll(array, values)\n : array;\n }\n\n /**\n * This method is like `_.pullAll` except that it accepts `iteratee` which is\n * invoked for each element of `array` and `values` to generate the criterion\n * by which they're compared. The iteratee is invoked with one argument: (value).\n *\n * **Note:** Unlike `_.differenceBy`, this method mutates `array`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {Array} values The values to remove.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];\n *\n * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');\n * console.log(array);\n * // => [{ 'x': 2 }]\n */\n function pullAllBy(array, values, iteratee) {\n return (array && array.length && values && values.length)\n ? basePullAll(array, values, getIteratee(iteratee, 2))\n : array;\n }\n\n /**\n * This method is like `_.pullAll` except that it accepts `comparator` which\n * is invoked to compare elements of `array` to `values`. The comparator is\n * invoked with two arguments: (arrVal, othVal).\n *\n * **Note:** Unlike `_.differenceWith`, this method mutates `array`.\n *\n * @static\n * @memberOf _\n * @since 4.6.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {Array} values The values to remove.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];\n *\n * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);\n * console.log(array);\n * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]\n */\n function pullAllWith(array, values, comparator) {\n return (array && array.length && values && values.length)\n ? basePullAll(array, values, undefined, comparator)\n : array;\n }\n\n /**\n * Removes elements from `array` corresponding to `indexes` and returns an\n * array of removed elements.\n *\n * **Note:** Unlike `_.at`, this method mutates `array`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {...(number|number[])} [indexes] The indexes of elements to remove.\n * @returns {Array} Returns the new array of removed elements.\n * @example\n *\n * var array = ['a', 'b', 'c', 'd'];\n * var pulled = _.pullAt(array, [1, 3]);\n *\n * console.log(array);\n * // => ['a', 'c']\n *\n * console.log(pulled);\n * // => ['b', 'd']\n */\n var pullAt = flatRest(function(array, indexes) {\n var length = array == null ? 0 : array.length,\n result = baseAt(array, indexes);\n\n basePullAt(array, arrayMap(indexes, function(index) {\n return isIndex(index, length) ? +index : index;\n }).sort(compareAscending));\n\n return result;\n });\n\n /**\n * Removes all elements from `array` that `predicate` returns truthy for\n * and returns an array of the removed elements. The predicate is invoked\n * with three arguments: (value, index, array).\n *\n * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`\n * to pull elements from an array by value.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new array of removed elements.\n * @example\n *\n * var array = [1, 2, 3, 4];\n * var evens = _.remove(array, function(n) {\n * return n % 2 == 0;\n * });\n *\n * console.log(array);\n * // => [1, 3]\n *\n * console.log(evens);\n * // => [2, 4]\n */\n function remove(array, predicate) {\n var result = [];\n if (!(array && array.length)) {\n return result;\n }\n var index = -1,\n indexes = [],\n length = array.length;\n\n predicate = getIteratee(predicate, 3);\n while (++index < length) {\n var value = array[index];\n if (predicate(value, index, array)) {\n result.push(value);\n indexes.push(index);\n }\n }\n basePullAt(array, indexes);\n return result;\n }\n\n /**\n * Reverses `array` so that the first element becomes the last, the second\n * element becomes the second to last, and so on.\n *\n * **Note:** This method mutates `array` and is based on\n * [`Array#reverse`](https://mdn.io/Array/reverse).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to modify.\n * @returns {Array} Returns `array`.\n * @example\n *\n * var array = [1, 2, 3];\n *\n * _.reverse(array);\n * // => [3, 2, 1]\n *\n * console.log(array);\n * // => [3, 2, 1]\n */\n function reverse(array) {\n return array == null ? array : nativeReverse.call(array);\n }\n\n /**\n * Creates a slice of `array` from `start` up to, but not including, `end`.\n *\n * **Note:** This method is used instead of\n * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are\n * returned.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to slice.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the slice of `array`.\n */\n function slice(array, start, end) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {\n start = 0;\n end = length;\n }\n else {\n start = start == null ? 0 : toInteger(start);\n end = end === undefined ? length : toInteger(end);\n }\n return baseSlice(array, start, end);\n }\n\n /**\n * Uses a binary search to determine the lowest index at which `value`\n * should be inserted into `array` in order to maintain its sort order.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n * @example\n *\n * _.sortedIndex([30, 50], 40);\n * // => 1\n */\n function sortedIndex(array, value) {\n return baseSortedIndex(array, value);\n }\n\n /**\n * This method is like `_.sortedIndex` except that it accepts `iteratee`\n * which is invoked for `value` and each element of `array` to compute their\n * sort ranking. The iteratee is invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n * @example\n *\n * var objects = [{ 'x': 4 }, { 'x': 5 }];\n *\n * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });\n * // => 0\n *\n * // The `_.property` iteratee shorthand.\n * _.sortedIndexBy(objects, { 'x': 4 }, 'x');\n * // => 0\n */\n function sortedIndexBy(array, value, iteratee) {\n return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));\n }\n\n /**\n * This method is like `_.indexOf` except that it performs a binary\n * search on a sorted `array`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n * @example\n *\n * _.sortedIndexOf([4, 5, 5, 5, 6], 5);\n * // => 1\n */\n function sortedIndexOf(array, value) {\n var length = array == null ? 0 : array.length;\n if (length) {\n var index = baseSortedIndex(array, value);\n if (index < length && eq(array[index], value)) {\n return index;\n }\n }\n return -1;\n }\n\n /**\n * This method is like `_.sortedIndex` except that it returns the highest\n * index at which `value` should be inserted into `array` in order to\n * maintain its sort order.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n * @example\n *\n * _.sortedLastIndex([4, 5, 5, 5, 6], 5);\n * // => 4\n */\n function sortedLastIndex(array, value) {\n return baseSortedIndex(array, value, true);\n }\n\n /**\n * This method is like `_.sortedLastIndex` except that it accepts `iteratee`\n * which is invoked for `value` and each element of `array` to compute their\n * sort ranking. The iteratee is invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The sorted array to inspect.\n * @param {*} value The value to evaluate.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {number} Returns the index at which `value` should be inserted\n * into `array`.\n * @example\n *\n * var objects = [{ 'x': 4 }, { 'x': 5 }];\n *\n * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });\n * // => 1\n *\n * // The `_.property` iteratee shorthand.\n * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');\n * // => 1\n */\n function sortedLastIndexBy(array, value, iteratee) {\n return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);\n }\n\n /**\n * This method is like `_.lastIndexOf` except that it performs a binary\n * search on a sorted `array`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n * @example\n *\n * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);\n * // => 3\n */\n function sortedLastIndexOf(array, value) {\n var length = array == null ? 0 : array.length;\n if (length) {\n var index = baseSortedIndex(array, value, true) - 1;\n if (eq(array[index], value)) {\n return index;\n }\n }\n return -1;\n }\n\n /**\n * This method is like `_.uniq` except that it's designed and optimized\n * for sorted arrays.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @returns {Array} Returns the new duplicate free array.\n * @example\n *\n * _.sortedUniq([1, 1, 2]);\n * // => [1, 2]\n */\n function sortedUniq(array) {\n return (array && array.length)\n ? baseSortedUniq(array)\n : [];\n }\n\n /**\n * This method is like `_.uniqBy` except that it's designed and optimized\n * for sorted arrays.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {Function} [iteratee] The iteratee invoked per element.\n * @returns {Array} Returns the new duplicate free array.\n * @example\n *\n * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);\n * // => [1.1, 2.3]\n */\n function sortedUniqBy(array, iteratee) {\n return (array && array.length)\n ? baseSortedUniq(array, getIteratee(iteratee, 2))\n : [];\n }\n\n /**\n * Gets all but the first element of `array`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.tail([1, 2, 3]);\n * // => [2, 3]\n */\n function tail(array) {\n var length = array == null ? 0 : array.length;\n return length ? baseSlice(array, 1, length) : [];\n }\n\n /**\n * Creates a slice of `array` with `n` elements taken from the beginning.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {number} [n=1] The number of elements to take.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.take([1, 2, 3]);\n * // => [1]\n *\n * _.take([1, 2, 3], 2);\n * // => [1, 2]\n *\n * _.take([1, 2, 3], 5);\n * // => [1, 2, 3]\n *\n * _.take([1, 2, 3], 0);\n * // => []\n */\n function take(array, n, guard) {\n if (!(array && array.length)) {\n return [];\n }\n n = (guard || n === undefined) ? 1 : toInteger(n);\n return baseSlice(array, 0, n < 0 ? 0 : n);\n }\n\n /**\n * Creates a slice of `array` with `n` elements taken from the end.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {number} [n=1] The number of elements to take.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * _.takeRight([1, 2, 3]);\n * // => [3]\n *\n * _.takeRight([1, 2, 3], 2);\n * // => [2, 3]\n *\n * _.takeRight([1, 2, 3], 5);\n * // => [1, 2, 3]\n *\n * _.takeRight([1, 2, 3], 0);\n * // => []\n */\n function takeRight(array, n, guard) {\n var length = array == null ? 0 : array.length;\n if (!length) {\n return [];\n }\n n = (guard || n === undefined) ? 1 : toInteger(n);\n n = length - n;\n return baseSlice(array, n < 0 ? 0 : n, length);\n }\n\n /**\n * Creates a slice of `array` with elements taken from the end. Elements are\n * taken until `predicate` returns falsey. The predicate is invoked with\n * three arguments: (value, index, array).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': true },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': false }\n * ];\n *\n * _.takeRightWhile(users, function(o) { return !o.active; });\n * // => objects for ['fred', 'pebbles']\n *\n * // The `_.matches` iteratee shorthand.\n * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });\n * // => objects for ['pebbles']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.takeRightWhile(users, ['active', false]);\n * // => objects for ['fred', 'pebbles']\n *\n * // The `_.property` iteratee shorthand.\n * _.takeRightWhile(users, 'active');\n * // => []\n */\n function takeRightWhile(array, predicate) {\n return (array && array.length)\n ? baseWhile(array, getIteratee(predicate, 3), false, true)\n : [];\n }\n\n /**\n * Creates a slice of `array` with elements taken from the beginning. Elements\n * are taken until `predicate` returns falsey. The predicate is invoked with\n * three arguments: (value, index, array).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Array\n * @param {Array} array The array to query.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the slice of `array`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'active': false },\n * { 'user': 'fred', 'active': false },\n * { 'user': 'pebbles', 'active': true }\n * ];\n *\n * _.takeWhile(users, function(o) { return !o.active; });\n * // => objects for ['barney', 'fred']\n *\n * // The `_.matches` iteratee shorthand.\n * _.takeWhile(users, { 'user': 'barney', 'active': false });\n * // => objects for ['barney']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.takeWhile(users, ['active', false]);\n * // => objects for ['barney', 'fred']\n *\n * // The `_.property` iteratee shorthand.\n * _.takeWhile(users, 'active');\n * // => []\n */\n function takeWhile(array, predicate) {\n return (array && array.length)\n ? baseWhile(array, getIteratee(predicate, 3))\n : [];\n }\n\n /**\n * Creates an array of unique values, in order, from all given arrays using\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @returns {Array} Returns the new array of combined values.\n * @example\n *\n * _.union([2], [1, 2]);\n * // => [2, 1]\n */\n var union = baseRest(function(arrays) {\n return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));\n });\n\n /**\n * This method is like `_.union` except that it accepts `iteratee` which is\n * invoked for each element of each `arrays` to generate the criterion by\n * which uniqueness is computed. Result values are chosen from the first\n * array in which the value occurs. The iteratee is invoked with one argument:\n * (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns the new array of combined values.\n * @example\n *\n * _.unionBy([2.1], [1.2, 2.3], Math.floor);\n * // => [2.1, 1.2]\n *\n * // The `_.property` iteratee shorthand.\n * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n * // => [{ 'x': 1 }, { 'x': 2 }]\n */\n var unionBy = baseRest(function(arrays) {\n var iteratee = last(arrays);\n if (isArrayLikeObject(iteratee)) {\n iteratee = undefined;\n }\n return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));\n });\n\n /**\n * This method is like `_.union` except that it accepts `comparator` which\n * is invoked to compare elements of `arrays`. Result values are chosen from\n * the first array in which the value occurs. The comparator is invoked\n * with two arguments: (arrVal, othVal).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of combined values.\n * @example\n *\n * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n *\n * _.unionWith(objects, others, _.isEqual);\n * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]\n */\n var unionWith = baseRest(function(arrays) {\n var comparator = last(arrays);\n comparator = typeof comparator == 'function' ? comparator : undefined;\n return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);\n });\n\n /**\n * Creates a duplicate-free version of an array, using\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons, in which only the first occurrence of each element\n * is kept. The order of result values is determined by the order they occur\n * in the array.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @returns {Array} Returns the new duplicate free array.\n * @example\n *\n * _.uniq([2, 1, 2]);\n * // => [2, 1]\n */\n function uniq(array) {\n return (array && array.length) ? baseUniq(array) : [];\n }\n\n /**\n * This method is like `_.uniq` except that it accepts `iteratee` which is\n * invoked for each element in `array` to generate the criterion by which\n * uniqueness is computed. The order of result values is determined by the\n * order they occur in the array. The iteratee is invoked with one argument:\n * (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns the new duplicate free array.\n * @example\n *\n * _.uniqBy([2.1, 1.2, 2.3], Math.floor);\n * // => [2.1, 1.2]\n *\n * // The `_.property` iteratee shorthand.\n * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');\n * // => [{ 'x': 1 }, { 'x': 2 }]\n */\n function uniqBy(array, iteratee) {\n return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];\n }\n\n /**\n * This method is like `_.uniq` except that it accepts `comparator` which\n * is invoked to compare elements of `array`. The order of result values is\n * determined by the order they occur in the array.The comparator is invoked\n * with two arguments: (arrVal, othVal).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new duplicate free array.\n * @example\n *\n * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];\n *\n * _.uniqWith(objects, _.isEqual);\n * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]\n */\n function uniqWith(array, comparator) {\n comparator = typeof comparator == 'function' ? comparator : undefined;\n return (array && array.length) ? baseUniq(array, undefined, comparator) : [];\n }\n\n /**\n * This method is like `_.zip` except that it accepts an array of grouped\n * elements and creates an array regrouping the elements to their pre-zip\n * configuration.\n *\n * @static\n * @memberOf _\n * @since 1.2.0\n * @category Array\n * @param {Array} array The array of grouped elements to process.\n * @returns {Array} Returns the new array of regrouped elements.\n * @example\n *\n * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);\n * // => [['a', 1, true], ['b', 2, false]]\n *\n * _.unzip(zipped);\n * // => [['a', 'b'], [1, 2], [true, false]]\n */\n function unzip(array) {\n if (!(array && array.length)) {\n return [];\n }\n var length = 0;\n array = arrayFilter(array, function(group) {\n if (isArrayLikeObject(group)) {\n length = nativeMax(group.length, length);\n return true;\n }\n });\n return baseTimes(length, function(index) {\n return arrayMap(array, baseProperty(index));\n });\n }\n\n /**\n * This method is like `_.unzip` except that it accepts `iteratee` to specify\n * how regrouped values should be combined. The iteratee is invoked with the\n * elements of each group: (...group).\n *\n * @static\n * @memberOf _\n * @since 3.8.0\n * @category Array\n * @param {Array} array The array of grouped elements to process.\n * @param {Function} [iteratee=_.identity] The function to combine\n * regrouped values.\n * @returns {Array} Returns the new array of regrouped elements.\n * @example\n *\n * var zipped = _.zip([1, 2], [10, 20], [100, 200]);\n * // => [[1, 10, 100], [2, 20, 200]]\n *\n * _.unzipWith(zipped, _.add);\n * // => [3, 30, 300]\n */\n function unzipWith(array, iteratee) {\n if (!(array && array.length)) {\n return [];\n }\n var result = unzip(array);\n if (iteratee == null) {\n return result;\n }\n return arrayMap(result, function(group) {\n return apply(iteratee, undefined, group);\n });\n }\n\n /**\n * Creates an array excluding all given values using\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * **Note:** Unlike `_.pull`, this method returns a new array.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to inspect.\n * @param {...*} [values] The values to exclude.\n * @returns {Array} Returns the new array of filtered values.\n * @see _.difference, _.xor\n * @example\n *\n * _.without([2, 1, 2, 3], 1, 2);\n * // => [3]\n */\n var without = baseRest(function(array, values) {\n return isArrayLikeObject(array)\n ? baseDifference(array, values)\n : [];\n });\n\n /**\n * Creates an array of unique values that is the\n * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)\n * of the given arrays. The order of result values is determined by the order\n * they occur in the arrays.\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @returns {Array} Returns the new array of filtered values.\n * @see _.difference, _.without\n * @example\n *\n * _.xor([2, 1], [2, 3]);\n * // => [1, 3]\n */\n var xor = baseRest(function(arrays) {\n return baseXor(arrayFilter(arrays, isArrayLikeObject));\n });\n\n /**\n * This method is like `_.xor` except that it accepts `iteratee` which is\n * invoked for each element of each `arrays` to generate the criterion by\n * which by which they're compared. The order of result values is determined\n * by the order they occur in the arrays. The iteratee is invoked with one\n * argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Array} Returns the new array of filtered values.\n * @example\n *\n * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n * // => [1.2, 3.4]\n *\n * // The `_.property` iteratee shorthand.\n * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n * // => [{ 'x': 2 }]\n */\n var xorBy = baseRest(function(arrays) {\n var iteratee = last(arrays);\n if (isArrayLikeObject(iteratee)) {\n iteratee = undefined;\n }\n return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));\n });\n\n /**\n * This method is like `_.xor` except that it accepts `comparator` which is\n * invoked to compare elements of `arrays`. The order of result values is\n * determined by the order they occur in the arrays. The comparator is invoked\n * with two arguments: (arrVal, othVal).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Array\n * @param {...Array} [arrays] The arrays to inspect.\n * @param {Function} [comparator] The comparator invoked per element.\n * @returns {Array} Returns the new array of filtered values.\n * @example\n *\n * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n *\n * _.xorWith(objects, others, _.isEqual);\n * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]\n */\n var xorWith = baseRest(function(arrays) {\n var comparator = last(arrays);\n comparator = typeof comparator == 'function' ? comparator : undefined;\n return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);\n });\n\n /**\n * Creates an array of grouped elements, the first of which contains the\n * first elements of the given arrays, the second of which contains the\n * second elements of the given arrays, and so on.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {...Array} [arrays] The arrays to process.\n * @returns {Array} Returns the new array of grouped elements.\n * @example\n *\n * _.zip(['a', 'b'], [1, 2], [true, false]);\n * // => [['a', 1, true], ['b', 2, false]]\n */\n var zip = baseRest(unzip);\n\n /**\n * This method is like `_.fromPairs` except that it accepts two arrays,\n * one of property identifiers and one of corresponding values.\n *\n * @static\n * @memberOf _\n * @since 0.4.0\n * @category Array\n * @param {Array} [props=[]] The property identifiers.\n * @param {Array} [values=[]] The property values.\n * @returns {Object} Returns the new object.\n * @example\n *\n * _.zipObject(['a', 'b'], [1, 2]);\n * // => { 'a': 1, 'b': 2 }\n */\n function zipObject(props, values) {\n return baseZipObject(props || [], values || [], assignValue);\n }\n\n /**\n * This method is like `_.zipObject` except that it supports property paths.\n *\n * @static\n * @memberOf _\n * @since 4.1.0\n * @category Array\n * @param {Array} [props=[]] The property identifiers.\n * @param {Array} [values=[]] The property values.\n * @returns {Object} Returns the new object.\n * @example\n *\n * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);\n * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }\n */\n function zipObjectDeep(props, values) {\n return baseZipObject(props || [], values || [], baseSet);\n }\n\n /**\n * This method is like `_.zip` except that it accepts `iteratee` to specify\n * how grouped values should be combined. The iteratee is invoked with the\n * elements of each group: (...group).\n *\n * @static\n * @memberOf _\n * @since 3.8.0\n * @category Array\n * @param {...Array} [arrays] The arrays to process.\n * @param {Function} [iteratee=_.identity] The function to combine\n * grouped values.\n * @returns {Array} Returns the new array of grouped elements.\n * @example\n *\n * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {\n * return a + b + c;\n * });\n * // => [111, 222]\n */\n var zipWith = baseRest(function(arrays) {\n var length = arrays.length,\n iteratee = length > 1 ? arrays[length - 1] : undefined;\n\n iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;\n return unzipWith(arrays, iteratee);\n });\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates a `lodash` wrapper instance that wraps `value` with explicit method\n * chain sequences enabled. The result of such sequences must be unwrapped\n * with `_#value`.\n *\n * @static\n * @memberOf _\n * @since 1.3.0\n * @category Seq\n * @param {*} value The value to wrap.\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36 },\n * { 'user': 'fred', 'age': 40 },\n * { 'user': 'pebbles', 'age': 1 }\n * ];\n *\n * var youngest = _\n * .chain(users)\n * .sortBy('age')\n * .map(function(o) {\n * return o.user + ' is ' + o.age;\n * })\n * .head()\n * .value();\n * // => 'pebbles is 1'\n */\n function chain(value) {\n var result = lodash(value);\n result.__chain__ = true;\n return result;\n }\n\n /**\n * This method invokes `interceptor` and returns `value`. The interceptor\n * is invoked with one argument; (value). The purpose of this method is to\n * \"tap into\" a method chain sequence in order to modify intermediate results.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Seq\n * @param {*} value The value to provide to `interceptor`.\n * @param {Function} interceptor The function to invoke.\n * @returns {*} Returns `value`.\n * @example\n *\n * _([1, 2, 3])\n * .tap(function(array) {\n * // Mutate input array.\n * array.pop();\n * })\n * .reverse()\n * .value();\n * // => [2, 1]\n */\n function tap(value, interceptor) {\n interceptor(value);\n return value;\n }\n\n /**\n * This method is like `_.tap` except that it returns the result of `interceptor`.\n * The purpose of this method is to \"pass thru\" values replacing intermediate\n * results in a method chain sequence.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Seq\n * @param {*} value The value to provide to `interceptor`.\n * @param {Function} interceptor The function to invoke.\n * @returns {*} Returns the result of `interceptor`.\n * @example\n *\n * _(' abc ')\n * .chain()\n * .trim()\n * .thru(function(value) {\n * return [value];\n * })\n * .value();\n * // => ['abc']\n */\n function thru(value, interceptor) {\n return interceptor(value);\n }\n\n /**\n * This method is the wrapper version of `_.at`.\n *\n * @name at\n * @memberOf _\n * @since 1.0.0\n * @category Seq\n * @param {...(string|string[])} [paths] The property paths to pick.\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };\n *\n * _(object).at(['a[0].b.c', 'a[1]']).value();\n * // => [3, 4]\n */\n var wrapperAt = flatRest(function(paths) {\n var length = paths.length,\n start = length ? paths[0] : 0,\n value = this.__wrapped__,\n interceptor = function(object) { return baseAt(object, paths); };\n\n if (length > 1 || this.__actions__.length ||\n !(value instanceof LazyWrapper) || !isIndex(start)) {\n return this.thru(interceptor);\n }\n value = value.slice(start, +start + (length ? 1 : 0));\n value.__actions__.push({\n 'func': thru,\n 'args': [interceptor],\n 'thisArg': undefined\n });\n return new LodashWrapper(value, this.__chain__).thru(function(array) {\n if (length && !array.length) {\n array.push(undefined);\n }\n return array;\n });\n });\n\n /**\n * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.\n *\n * @name chain\n * @memberOf _\n * @since 0.1.0\n * @category Seq\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36 },\n * { 'user': 'fred', 'age': 40 }\n * ];\n *\n * // A sequence without explicit chaining.\n * _(users).head();\n * // => { 'user': 'barney', 'age': 36 }\n *\n * // A sequence with explicit chaining.\n * _(users)\n * .chain()\n * .head()\n * .pick('user')\n * .value();\n * // => { 'user': 'barney' }\n */\n function wrapperChain() {\n return chain(this);\n }\n\n /**\n * Executes the chain sequence and returns the wrapped result.\n *\n * @name commit\n * @memberOf _\n * @since 3.2.0\n * @category Seq\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * var array = [1, 2];\n * var wrapped = _(array).push(3);\n *\n * console.log(array);\n * // => [1, 2]\n *\n * wrapped = wrapped.commit();\n * console.log(array);\n * // => [1, 2, 3]\n *\n * wrapped.last();\n * // => 3\n *\n * console.log(array);\n * // => [1, 2, 3]\n */\n function wrapperCommit() {\n return new LodashWrapper(this.value(), this.__chain__);\n }\n\n /**\n * Gets the next value on a wrapped object following the\n * [iterator protocol](https://mdn.io/iteration_protocols#iterator).\n *\n * @name next\n * @memberOf _\n * @since 4.0.0\n * @category Seq\n * @returns {Object} Returns the next iterator value.\n * @example\n *\n * var wrapped = _([1, 2]);\n *\n * wrapped.next();\n * // => { 'done': false, 'value': 1 }\n *\n * wrapped.next();\n * // => { 'done': false, 'value': 2 }\n *\n * wrapped.next();\n * // => { 'done': true, 'value': undefined }\n */\n function wrapperNext() {\n if (this.__values__ === undefined) {\n this.__values__ = toArray(this.value());\n }\n var done = this.__index__ >= this.__values__.length,\n value = done ? undefined : this.__values__[this.__index__++];\n\n return { 'done': done, 'value': value };\n }\n\n /**\n * Enables the wrapper to be iterable.\n *\n * @name Symbol.iterator\n * @memberOf _\n * @since 4.0.0\n * @category Seq\n * @returns {Object} Returns the wrapper object.\n * @example\n *\n * var wrapped = _([1, 2]);\n *\n * wrapped[Symbol.iterator]() === wrapped;\n * // => true\n *\n * Array.from(wrapped);\n * // => [1, 2]\n */\n function wrapperToIterator() {\n return this;\n }\n\n /**\n * Creates a clone of the chain sequence planting `value` as the wrapped value.\n *\n * @name plant\n * @memberOf _\n * @since 3.2.0\n * @category Seq\n * @param {*} value The value to plant.\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * function square(n) {\n * return n * n;\n * }\n *\n * var wrapped = _([1, 2]).map(square);\n * var other = wrapped.plant([3, 4]);\n *\n * other.value();\n * // => [9, 16]\n *\n * wrapped.value();\n * // => [1, 4]\n */\n function wrapperPlant(value) {\n var result,\n parent = this;\n\n while (parent instanceof baseLodash) {\n var clone = wrapperClone(parent);\n clone.__index__ = 0;\n clone.__values__ = undefined;\n if (result) {\n previous.__wrapped__ = clone;\n } else {\n result = clone;\n }\n var previous = clone;\n parent = parent.__wrapped__;\n }\n previous.__wrapped__ = value;\n return result;\n }\n\n /**\n * This method is the wrapper version of `_.reverse`.\n *\n * **Note:** This method mutates the wrapped array.\n *\n * @name reverse\n * @memberOf _\n * @since 0.1.0\n * @category Seq\n * @returns {Object} Returns the new `lodash` wrapper instance.\n * @example\n *\n * var array = [1, 2, 3];\n *\n * _(array).reverse().value()\n * // => [3, 2, 1]\n *\n * console.log(array);\n * // => [3, 2, 1]\n */\n function wrapperReverse() {\n var value = this.__wrapped__;\n if (value instanceof LazyWrapper) {\n var wrapped = value;\n if (this.__actions__.length) {\n wrapped = new LazyWrapper(this);\n }\n wrapped = wrapped.reverse();\n wrapped.__actions__.push({\n 'func': thru,\n 'args': [reverse],\n 'thisArg': undefined\n });\n return new LodashWrapper(wrapped, this.__chain__);\n }\n return this.thru(reverse);\n }\n\n /**\n * Executes the chain sequence to resolve the unwrapped value.\n *\n * @name value\n * @memberOf _\n * @since 0.1.0\n * @alias toJSON, valueOf\n * @category Seq\n * @returns {*} Returns the resolved unwrapped value.\n * @example\n *\n * _([1, 2, 3]).value();\n * // => [1, 2, 3]\n */\n function wrapperValue() {\n return baseWrapperValue(this.__wrapped__, this.__actions__);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Creates an object composed of keys generated from the results of running\n * each element of `collection` thru `iteratee`. The corresponding value of\n * each key is the number of times the key was returned by `iteratee`. The\n * iteratee is invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 0.5.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n * @returns {Object} Returns the composed aggregate object.\n * @example\n *\n * _.countBy([6.1, 4.2, 6.3], Math.floor);\n * // => { '4': 1, '6': 2 }\n *\n * // The `_.property` iteratee shorthand.\n * _.countBy(['one', 'two', 'three'], 'length');\n * // => { '3': 2, '5': 1 }\n */\n var countBy = createAggregator(function(result, value, key) {\n if (hasOwnProperty.call(result, key)) {\n ++result[key];\n } else {\n baseAssignValue(result, key, 1);\n }\n });\n\n /**\n * Checks if `predicate` returns truthy for **all** elements of `collection`.\n * Iteration is stopped once `predicate` returns falsey. The predicate is\n * invoked with three arguments: (value, index|key, collection).\n *\n * **Note:** This method returns `true` for\n * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because\n * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of\n * elements of empty collections.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {boolean} Returns `true` if all elements pass the predicate check,\n * else `false`.\n * @example\n *\n * _.every([true, 1, null, 'yes'], Boolean);\n * // => false\n *\n * var users = [\n * { 'user': 'barney', 'age': 36, 'active': false },\n * { 'user': 'fred', 'age': 40, 'active': false }\n * ];\n *\n * // The `_.matches` iteratee shorthand.\n * _.every(users, { 'user': 'barney', 'active': false });\n * // => false\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.every(users, ['active', false]);\n * // => true\n *\n * // The `_.property` iteratee shorthand.\n * _.every(users, 'active');\n * // => false\n */\n function every(collection, predicate, guard) {\n var func = isArray(collection) ? arrayEvery : baseEvery;\n if (guard && isIterateeCall(collection, predicate, guard)) {\n predicate = undefined;\n }\n return func(collection, getIteratee(predicate, 3));\n }\n\n /**\n * Iterates over elements of `collection`, returning an array of all elements\n * `predicate` returns truthy for. The predicate is invoked with three\n * arguments: (value, index|key, collection).\n *\n * **Note:** Unlike `_.remove`, this method returns a new array.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n * @see _.reject\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36, 'active': true },\n * { 'user': 'fred', 'age': 40, 'active': false }\n * ];\n *\n * _.filter(users, function(o) { return !o.active; });\n * // => objects for ['fred']\n *\n * // The `_.matches` iteratee shorthand.\n * _.filter(users, { 'age': 36, 'active': true });\n * // => objects for ['barney']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.filter(users, ['active', false]);\n * // => objects for ['fred']\n *\n * // The `_.property` iteratee shorthand.\n * _.filter(users, 'active');\n * // => objects for ['barney']\n *\n * // Combining several predicates using `_.overEvery` or `_.overSome`.\n * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));\n * // => objects for ['fred', 'barney']\n */\n function filter(collection, predicate) {\n var func = isArray(collection) ? arrayFilter : baseFilter;\n return func(collection, getIteratee(predicate, 3));\n }\n\n /**\n * Iterates over elements of `collection`, returning the first element\n * `predicate` returns truthy for. The predicate is invoked with three\n * arguments: (value, index|key, collection).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param {number} [fromIndex=0] The index to search from.\n * @returns {*} Returns the matched element, else `undefined`.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36, 'active': true },\n * { 'user': 'fred', 'age': 40, 'active': false },\n * { 'user': 'pebbles', 'age': 1, 'active': true }\n * ];\n *\n * _.find(users, function(o) { return o.age < 40; });\n * // => object for 'barney'\n *\n * // The `_.matches` iteratee shorthand.\n * _.find(users, { 'age': 1, 'active': true });\n * // => object for 'pebbles'\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.find(users, ['active', false]);\n * // => object for 'fred'\n *\n * // The `_.property` iteratee shorthand.\n * _.find(users, 'active');\n * // => object for 'barney'\n */\n var find = createFind(findIndex);\n\n /**\n * This method is like `_.find` except that it iterates over elements of\n * `collection` from right to left.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param {number} [fromIndex=collection.length-1] The index to search from.\n * @returns {*} Returns the matched element, else `undefined`.\n * @example\n *\n * _.findLast([1, 2, 3, 4], function(n) {\n * return n % 2 == 1;\n * });\n * // => 3\n */\n var findLast = createFind(findLastIndex);\n\n /**\n * Creates a flattened array of values by running each element in `collection`\n * thru `iteratee` and flattening the mapped results. The iteratee is invoked\n * with three arguments: (value, index|key, collection).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * function duplicate(n) {\n * return [n, n];\n * }\n *\n * _.flatMap([1, 2], duplicate);\n * // => [1, 1, 2, 2]\n */\n function flatMap(collection, iteratee) {\n return baseFlatten(map(collection, iteratee), 1);\n }\n\n /**\n * This method is like `_.flatMap` except that it recursively flattens the\n * mapped results.\n *\n * @static\n * @memberOf _\n * @since 4.7.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * function duplicate(n) {\n * return [[[n, n]]];\n * }\n *\n * _.flatMapDeep([1, 2], duplicate);\n * // => [1, 1, 2, 2]\n */\n function flatMapDeep(collection, iteratee) {\n return baseFlatten(map(collection, iteratee), INFINITY);\n }\n\n /**\n * This method is like `_.flatMap` except that it recursively flattens the\n * mapped results up to `depth` times.\n *\n * @static\n * @memberOf _\n * @since 4.7.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @param {number} [depth=1] The maximum recursion depth.\n * @returns {Array} Returns the new flattened array.\n * @example\n *\n * function duplicate(n) {\n * return [[[n, n]]];\n * }\n *\n * _.flatMapDepth([1, 2], duplicate, 2);\n * // => [[1, 1], [2, 2]]\n */\n function flatMapDepth(collection, iteratee, depth) {\n depth = depth === undefined ? 1 : toInteger(depth);\n return baseFlatten(map(collection, iteratee), depth);\n }\n\n /**\n * Iterates over elements of `collection` and invokes `iteratee` for each element.\n * The iteratee is invoked with three arguments: (value, index|key, collection).\n * Iteratee functions may exit iteration early by explicitly returning `false`.\n *\n * **Note:** As with other \"Collections\" methods, objects with a \"length\"\n * property are iterated like arrays. To avoid this behavior use `_.forIn`\n * or `_.forOwn` for object iteration.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @alias each\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Array|Object} Returns `collection`.\n * @see _.forEachRight\n * @example\n *\n * _.forEach([1, 2], function(value) {\n * console.log(value);\n * });\n * // => Logs `1` then `2`.\n *\n * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'a' then 'b' (iteration order is not guaranteed).\n */\n function forEach(collection, iteratee) {\n var func = isArray(collection) ? arrayEach : baseEach;\n return func(collection, getIteratee(iteratee, 3));\n }\n\n /**\n * This method is like `_.forEach` except that it iterates over elements of\n * `collection` from right to left.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @alias eachRight\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Array|Object} Returns `collection`.\n * @see _.forEach\n * @example\n *\n * _.forEachRight([1, 2], function(value) {\n * console.log(value);\n * });\n * // => Logs `2` then `1`.\n */\n function forEachRight(collection, iteratee) {\n var func = isArray(collection) ? arrayEachRight : baseEachRight;\n return func(collection, getIteratee(iteratee, 3));\n }\n\n /**\n * Creates an object composed of keys generated from the results of running\n * each element of `collection` thru `iteratee`. The order of grouped values\n * is determined by the order they occur in `collection`. The corresponding\n * value of each key is an array of elements responsible for generating the\n * key. The iteratee is invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n * @returns {Object} Returns the composed aggregate object.\n * @example\n *\n * _.groupBy([6.1, 4.2, 6.3], Math.floor);\n * // => { '4': [4.2], '6': [6.1, 6.3] }\n *\n * // The `_.property` iteratee shorthand.\n * _.groupBy(['one', 'two', 'three'], 'length');\n * // => { '3': ['one', 'two'], '5': ['three'] }\n */\n var groupBy = createAggregator(function(result, value, key) {\n if (hasOwnProperty.call(result, key)) {\n result[key].push(value);\n } else {\n baseAssignValue(result, key, [value]);\n }\n });\n\n /**\n * Checks if `value` is in `collection`. If `collection` is a string, it's\n * checked for a substring of `value`, otherwise\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * is used for equality comparisons. If `fromIndex` is negative, it's used as\n * the offset from the end of `collection`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object|string} collection The collection to inspect.\n * @param {*} value The value to search for.\n * @param {number} [fromIndex=0] The index to search from.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.\n * @returns {boolean} Returns `true` if `value` is found, else `false`.\n * @example\n *\n * _.includes([1, 2, 3], 1);\n * // => true\n *\n * _.includes([1, 2, 3], 1, 2);\n * // => false\n *\n * _.includes({ 'a': 1, 'b': 2 }, 1);\n * // => true\n *\n * _.includes('abcd', 'bc');\n * // => true\n */\n function includes(collection, value, fromIndex, guard) {\n collection = isArrayLike(collection) ? collection : values(collection);\n fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;\n\n var length = collection.length;\n if (fromIndex < 0) {\n fromIndex = nativeMax(length + fromIndex, 0);\n }\n return isString(collection)\n ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)\n : (!!length && baseIndexOf(collection, value, fromIndex) > -1);\n }\n\n /**\n * Invokes the method at `path` of each element in `collection`, returning\n * an array of the results of each invoked method. Any additional arguments\n * are provided to each invoked method. If `path` is a function, it's invoked\n * for, and `this` bound to, each element in `collection`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Array|Function|string} path The path of the method to invoke or\n * the function invoked per iteration.\n * @param {...*} [args] The arguments to invoke each method with.\n * @returns {Array} Returns the array of results.\n * @example\n *\n * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');\n * // => [[1, 5, 7], [1, 2, 3]]\n *\n * _.invokeMap([123, 456], String.prototype.split, '');\n * // => [['1', '2', '3'], ['4', '5', '6']]\n */\n var invokeMap = baseRest(function(collection, path, args) {\n var index = -1,\n isFunc = typeof path == 'function',\n result = isArrayLike(collection) ? Array(collection.length) : [];\n\n baseEach(collection, function(value) {\n result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);\n });\n return result;\n });\n\n /**\n * Creates an object composed of keys generated from the results of running\n * each element of `collection` thru `iteratee`. The corresponding value of\n * each key is the last element responsible for generating the key. The\n * iteratee is invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n * @returns {Object} Returns the composed aggregate object.\n * @example\n *\n * var array = [\n * { 'dir': 'left', 'code': 97 },\n * { 'dir': 'right', 'code': 100 }\n * ];\n *\n * _.keyBy(array, function(o) {\n * return String.fromCharCode(o.code);\n * });\n * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }\n *\n * _.keyBy(array, 'dir');\n * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }\n */\n var keyBy = createAggregator(function(result, value, key) {\n baseAssignValue(result, key, value);\n });\n\n /**\n * Creates an array of values by running each element in `collection` thru\n * `iteratee`. The iteratee is invoked with three arguments:\n * (value, index|key, collection).\n *\n * Many lodash methods are guarded to work as iteratees for methods like\n * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.\n *\n * The guarded methods are:\n * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,\n * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,\n * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,\n * `template`, `trim`, `trimEnd`, `trimStart`, and `words`\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n * @example\n *\n * function square(n) {\n * return n * n;\n * }\n *\n * _.map([4, 8], square);\n * // => [16, 64]\n *\n * _.map({ 'a': 4, 'b': 8 }, square);\n * // => [16, 64] (iteration order is not guaranteed)\n *\n * var users = [\n * { 'user': 'barney' },\n * { 'user': 'fred' }\n * ];\n *\n * // The `_.property` iteratee shorthand.\n * _.map(users, 'user');\n * // => ['barney', 'fred']\n */\n function map(collection, iteratee) {\n var func = isArray(collection) ? arrayMap : baseMap;\n return func(collection, getIteratee(iteratee, 3));\n }\n\n /**\n * This method is like `_.sortBy` except that it allows specifying the sort\n * orders of the iteratees to sort by. If `orders` is unspecified, all values\n * are sorted in ascending order. Otherwise, specify an order of \"desc\" for\n * descending or \"asc\" for ascending sort order of corresponding values.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]\n * The iteratees to sort by.\n * @param {string[]} [orders] The sort orders of `iteratees`.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.\n * @returns {Array} Returns the new sorted array.\n * @example\n *\n * var users = [\n * { 'user': 'fred', 'age': 48 },\n * { 'user': 'barney', 'age': 34 },\n * { 'user': 'fred', 'age': 40 },\n * { 'user': 'barney', 'age': 36 }\n * ];\n *\n * // Sort by `user` in ascending order and by `age` in descending order.\n * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);\n * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]\n */\n function orderBy(collection, iteratees, orders, guard) {\n if (collection == null) {\n return [];\n }\n if (!isArray(iteratees)) {\n iteratees = iteratees == null ? [] : [iteratees];\n }\n orders = guard ? undefined : orders;\n if (!isArray(orders)) {\n orders = orders == null ? [] : [orders];\n }\n return baseOrderBy(collection, iteratees, orders);\n }\n\n /**\n * Creates an array of elements split into two groups, the first of which\n * contains elements `predicate` returns truthy for, the second of which\n * contains elements `predicate` returns falsey for. The predicate is\n * invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the array of grouped elements.\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36, 'active': false },\n * { 'user': 'fred', 'age': 40, 'active': true },\n * { 'user': 'pebbles', 'age': 1, 'active': false }\n * ];\n *\n * _.partition(users, function(o) { return o.active; });\n * // => objects for [['fred'], ['barney', 'pebbles']]\n *\n * // The `_.matches` iteratee shorthand.\n * _.partition(users, { 'age': 1, 'active': false });\n * // => objects for [['pebbles'], ['barney', 'fred']]\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.partition(users, ['active', false]);\n * // => objects for [['barney', 'pebbles'], ['fred']]\n *\n * // The `_.property` iteratee shorthand.\n * _.partition(users, 'active');\n * // => objects for [['fred'], ['barney', 'pebbles']]\n */\n var partition = createAggregator(function(result, value, key) {\n result[key ? 0 : 1].push(value);\n }, function() { return [[], []]; });\n\n /**\n * Reduces `collection` to a value which is the accumulated result of running\n * each element in `collection` thru `iteratee`, where each successive\n * invocation is supplied the return value of the previous. If `accumulator`\n * is not given, the first element of `collection` is used as the initial\n * value. The iteratee is invoked with four arguments:\n * (accumulator, value, index|key, collection).\n *\n * Many lodash methods are guarded to work as iteratees for methods like\n * `_.reduce`, `_.reduceRight`, and `_.transform`.\n *\n * The guarded methods are:\n * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,\n * and `sortBy`\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @param {*} [accumulator] The initial value.\n * @returns {*} Returns the accumulated value.\n * @see _.reduceRight\n * @example\n *\n * _.reduce([1, 2], function(sum, n) {\n * return sum + n;\n * }, 0);\n * // => 3\n *\n * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {\n * (result[value] || (result[value] = [])).push(key);\n * return result;\n * }, {});\n * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)\n */\n function reduce(collection, iteratee, accumulator) {\n var func = isArray(collection) ? arrayReduce : baseReduce,\n initAccum = arguments.length < 3;\n\n return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);\n }\n\n /**\n * This method is like `_.reduce` except that it iterates over elements of\n * `collection` from right to left.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @param {*} [accumulator] The initial value.\n * @returns {*} Returns the accumulated value.\n * @see _.reduce\n * @example\n *\n * var array = [[0, 1], [2, 3], [4, 5]];\n *\n * _.reduceRight(array, function(flattened, other) {\n * return flattened.concat(other);\n * }, []);\n * // => [4, 5, 2, 3, 0, 1]\n */\n function reduceRight(collection, iteratee, accumulator) {\n var func = isArray(collection) ? arrayReduceRight : baseReduce,\n initAccum = arguments.length < 3;\n\n return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);\n }\n\n /**\n * The opposite of `_.filter`; this method returns the elements of `collection`\n * that `predicate` does **not** return truthy for.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n * @see _.filter\n * @example\n *\n * var users = [\n * { 'user': 'barney', 'age': 36, 'active': false },\n * { 'user': 'fred', 'age': 40, 'active': true }\n * ];\n *\n * _.reject(users, function(o) { return !o.active; });\n * // => objects for ['fred']\n *\n * // The `_.matches` iteratee shorthand.\n * _.reject(users, { 'age': 40, 'active': true });\n * // => objects for ['barney']\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.reject(users, ['active', false]);\n * // => objects for ['fred']\n *\n * // The `_.property` iteratee shorthand.\n * _.reject(users, 'active');\n * // => objects for ['barney']\n */\n function reject(collection, predicate) {\n var func = isArray(collection) ? arrayFilter : baseFilter;\n return func(collection, negate(getIteratee(predicate, 3)));\n }\n\n /**\n * Gets a random element from `collection`.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to sample.\n * @returns {*} Returns the random element.\n * @example\n *\n * _.sample([1, 2, 3, 4]);\n * // => 2\n */\n function sample(collection) {\n var func = isArray(collection) ? arraySample : baseSample;\n return func(collection);\n }\n\n /**\n * Gets `n` random elements at unique keys from `collection` up to the\n * size of `collection`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Collection\n * @param {Array|Object} collection The collection to sample.\n * @param {number} [n=1] The number of elements to sample.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the random elements.\n * @example\n *\n * _.sampleSize([1, 2, 3], 2);\n * // => [3, 1]\n *\n * _.sampleSize([1, 2, 3], 4);\n * // => [2, 3, 1]\n */\n function sampleSize(collection, n, guard) {\n if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {\n n = 1;\n } else {\n n = toInteger(n);\n }\n var func = isArray(collection) ? arraySampleSize : baseSampleSize;\n return func(collection, n);\n }\n\n /**\n * Creates an array of shuffled values, using a version of the\n * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to shuffle.\n * @returns {Array} Returns the new shuffled array.\n * @example\n *\n * _.shuffle([1, 2, 3, 4]);\n * // => [4, 1, 3, 2]\n */\n function shuffle(collection) {\n var func = isArray(collection) ? arrayShuffle : baseShuffle;\n return func(collection);\n }\n\n /**\n * Gets the size of `collection` by returning its length for array-like\n * values or the number of own enumerable string keyed properties for objects.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object|string} collection The collection to inspect.\n * @returns {number} Returns the collection size.\n * @example\n *\n * _.size([1, 2, 3]);\n * // => 3\n *\n * _.size({ 'a': 1, 'b': 2 });\n * // => 2\n *\n * _.size('pebbles');\n * // => 7\n */\n function size(collection) {\n if (collection == null) {\n return 0;\n }\n if (isArrayLike(collection)) {\n return isString(collection) ? stringSize(collection) : collection.length;\n }\n var tag = getTag(collection);\n if (tag == mapTag || tag == setTag) {\n return collection.size;\n }\n return baseKeys(collection).length;\n }\n\n /**\n * Checks if `predicate` returns truthy for **any** element of `collection`.\n * Iteration is stopped once `predicate` returns truthy. The predicate is\n * invoked with three arguments: (value, index|key, collection).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n * @example\n *\n * _.some([null, 0, 'yes', false], Boolean);\n * // => true\n *\n * var users = [\n * { 'user': 'barney', 'active': true },\n * { 'user': 'fred', 'active': false }\n * ];\n *\n * // The `_.matches` iteratee shorthand.\n * _.some(users, { 'user': 'barney', 'active': false });\n * // => false\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.some(users, ['active', false]);\n * // => true\n *\n * // The `_.property` iteratee shorthand.\n * _.some(users, 'active');\n * // => true\n */\n function some(collection, predicate, guard) {\n var func = isArray(collection) ? arraySome : baseSome;\n if (guard && isIterateeCall(collection, predicate, guard)) {\n predicate = undefined;\n }\n return func(collection, getIteratee(predicate, 3));\n }\n\n /**\n * Creates an array of elements, sorted in ascending order by the results of\n * running each element in a collection thru each iteratee. This method\n * performs a stable sort, that is, it preserves the original sort order of\n * equal elements. The iteratees are invoked with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Collection\n * @param {Array|Object} collection The collection to iterate over.\n * @param {...(Function|Function[])} [iteratees=[_.identity]]\n * The iteratees to sort by.\n * @returns {Array} Returns the new sorted array.\n * @example\n *\n * var users = [\n * { 'user': 'fred', 'age': 48 },\n * { 'user': 'barney', 'age': 36 },\n * { 'user': 'fred', 'age': 30 },\n * { 'user': 'barney', 'age': 34 }\n * ];\n *\n * _.sortBy(users, [function(o) { return o.user; }]);\n * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]\n *\n * _.sortBy(users, ['user', 'age']);\n * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]\n */\n var sortBy = baseRest(function(collection, iteratees) {\n if (collection == null) {\n return [];\n }\n var length = iteratees.length;\n if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {\n iteratees = [];\n } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {\n iteratees = [iteratees[0]];\n }\n return baseOrderBy(collection, baseFlatten(iteratees, 1), []);\n });\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n * console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\n var now = ctxNow || function() {\n return root.Date.now();\n };\n\n /*------------------------------------------------------------------------*/\n\n /**\n * The opposite of `_.before`; this method creates a function that invokes\n * `func` once it's called `n` or more times.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {number} n The number of calls before `func` is invoked.\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new restricted function.\n * @example\n *\n * var saves = ['profile', 'settings'];\n *\n * var done = _.after(saves.length, function() {\n * console.log('done saving!');\n * });\n *\n * _.forEach(saves, function(type) {\n * asyncSave({ 'type': type, 'complete': done });\n * });\n * // => Logs 'done saving!' after the two async saves have completed.\n */\n function after(n, func) {\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n n = toInteger(n);\n return function() {\n if (--n < 1) {\n return func.apply(this, arguments);\n }\n };\n }\n\n /**\n * Creates a function that invokes `func`, with up to `n` arguments,\n * ignoring any additional arguments.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Function\n * @param {Function} func The function to cap arguments for.\n * @param {number} [n=func.length] The arity cap.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Function} Returns the new capped function.\n * @example\n *\n * _.map(['6', '8', '10'], _.ary(parseInt, 1));\n * // => [6, 8, 10]\n */\n function ary(func, n, guard) {\n n = guard ? undefined : n;\n n = (func && n == null) ? func.length : n;\n return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);\n }\n\n /**\n * Creates a function that invokes `func`, with the `this` binding and arguments\n * of the created function, while it's called less than `n` times. Subsequent\n * calls to the created function return the result of the last `func` invocation.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Function\n * @param {number} n The number of calls at which `func` is no longer invoked.\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new restricted function.\n * @example\n *\n * jQuery(element).on('click', _.before(5, addContactToList));\n * // => Allows adding up to 4 contacts to the list.\n */\n function before(n, func) {\n var result;\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n n = toInteger(n);\n return function() {\n if (--n > 0) {\n result = func.apply(this, arguments);\n }\n if (n <= 1) {\n func = undefined;\n }\n return result;\n };\n }\n\n /**\n * Creates a function that invokes `func` with the `this` binding of `thisArg`\n * and `partials` prepended to the arguments it receives.\n *\n * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,\n * may be used as a placeholder for partially applied arguments.\n *\n * **Note:** Unlike native `Function#bind`, this method doesn't set the \"length\"\n * property of bound functions.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to bind.\n * @param {*} thisArg The `this` binding of `func`.\n * @param {...*} [partials] The arguments to be partially applied.\n * @returns {Function} Returns the new bound function.\n * @example\n *\n * function greet(greeting, punctuation) {\n * return greeting + ' ' + this.user + punctuation;\n * }\n *\n * var object = { 'user': 'fred' };\n *\n * var bound = _.bind(greet, object, 'hi');\n * bound('!');\n * // => 'hi fred!'\n *\n * // Bound with placeholders.\n * var bound = _.bind(greet, object, _, '!');\n * bound('hi');\n * // => 'hi fred!'\n */\n var bind = baseRest(function(func, thisArg, partials) {\n var bitmask = WRAP_BIND_FLAG;\n if (partials.length) {\n var holders = replaceHolders(partials, getHolder(bind));\n bitmask |= WRAP_PARTIAL_FLAG;\n }\n return createWrap(func, bitmask, thisArg, partials, holders);\n });\n\n /**\n * Creates a function that invokes the method at `object[key]` with `partials`\n * prepended to the arguments it receives.\n *\n * This method differs from `_.bind` by allowing bound functions to reference\n * methods that may be redefined or don't yet exist. See\n * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)\n * for more details.\n *\n * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic\n * builds, may be used as a placeholder for partially applied arguments.\n *\n * @static\n * @memberOf _\n * @since 0.10.0\n * @category Function\n * @param {Object} object The object to invoke the method on.\n * @param {string} key The key of the method.\n * @param {...*} [partials] The arguments to be partially applied.\n * @returns {Function} Returns the new bound function.\n * @example\n *\n * var object = {\n * 'user': 'fred',\n * 'greet': function(greeting, punctuation) {\n * return greeting + ' ' + this.user + punctuation;\n * }\n * };\n *\n * var bound = _.bindKey(object, 'greet', 'hi');\n * bound('!');\n * // => 'hi fred!'\n *\n * object.greet = function(greeting, punctuation) {\n * return greeting + 'ya ' + this.user + punctuation;\n * };\n *\n * bound('!');\n * // => 'hiya fred!'\n *\n * // Bound with placeholders.\n * var bound = _.bindKey(object, 'greet', _, '!');\n * bound('hi');\n * // => 'hiya fred!'\n */\n var bindKey = baseRest(function(object, key, partials) {\n var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;\n if (partials.length) {\n var holders = replaceHolders(partials, getHolder(bindKey));\n bitmask |= WRAP_PARTIAL_FLAG;\n }\n return createWrap(key, bitmask, object, partials, holders);\n });\n\n /**\n * Creates a function that accepts arguments of `func` and either invokes\n * `func` returning its result, if at least `arity` number of arguments have\n * been provided, or returns a function that accepts the remaining `func`\n * arguments, and so on. The arity of `func` may be specified if `func.length`\n * is not sufficient.\n *\n * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,\n * may be used as a placeholder for provided arguments.\n *\n * **Note:** This method doesn't set the \"length\" property of curried functions.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Function\n * @param {Function} func The function to curry.\n * @param {number} [arity=func.length] The arity of `func`.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Function} Returns the new curried function.\n * @example\n *\n * var abc = function(a, b, c) {\n * return [a, b, c];\n * };\n *\n * var curried = _.curry(abc);\n *\n * curried(1)(2)(3);\n * // => [1, 2, 3]\n *\n * curried(1, 2)(3);\n * // => [1, 2, 3]\n *\n * curried(1, 2, 3);\n * // => [1, 2, 3]\n *\n * // Curried with placeholders.\n * curried(1)(_, 3)(2);\n * // => [1, 2, 3]\n */\n function curry(func, arity, guard) {\n arity = guard ? undefined : arity;\n var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);\n result.placeholder = curry.placeholder;\n return result;\n }\n\n /**\n * This method is like `_.curry` except that arguments are applied to `func`\n * in the manner of `_.partialRight` instead of `_.partial`.\n *\n * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic\n * builds, may be used as a placeholder for provided arguments.\n *\n * **Note:** This method doesn't set the \"length\" property of curried functions.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Function\n * @param {Function} func The function to curry.\n * @param {number} [arity=func.length] The arity of `func`.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Function} Returns the new curried function.\n * @example\n *\n * var abc = function(a, b, c) {\n * return [a, b, c];\n * };\n *\n * var curried = _.curryRight(abc);\n *\n * curried(3)(2)(1);\n * // => [1, 2, 3]\n *\n * curried(2, 3)(1);\n * // => [1, 2, 3]\n *\n * curried(1, 2, 3);\n * // => [1, 2, 3]\n *\n * // Curried with placeholders.\n * curried(3)(1, _)(2);\n * // => [1, 2, 3]\n */\n function curryRight(func, arity, guard) {\n arity = guard ? undefined : arity;\n var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);\n result.placeholder = curryRight.placeholder;\n return result;\n }\n\n /**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n * Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n * The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n * 'leading': true,\n * 'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\n function debounce(func, wait, options) {\n var lastArgs,\n lastThis,\n maxWait,\n result,\n timerId,\n lastCallTime,\n lastInvokeTime = 0,\n leading = false,\n maxing = false,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n wait = toNumber(wait) || 0;\n if (isObject(options)) {\n leading = !!options.leading;\n maxing = 'maxWait' in options;\n maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n\n function invokeFunc(time) {\n var args = lastArgs,\n thisArg = lastThis;\n\n lastArgs = lastThis = undefined;\n lastInvokeTime = time;\n result = func.apply(thisArg, args);\n return result;\n }\n\n function leadingEdge(time) {\n // Reset any `maxWait` timer.\n lastInvokeTime = time;\n // Start the timer for the trailing edge.\n timerId = setTimeout(timerExpired, wait);\n // Invoke the leading edge.\n return leading ? invokeFunc(time) : result;\n }\n\n function remainingWait(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime,\n timeWaiting = wait - timeSinceLastCall;\n\n return maxing\n ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n : timeWaiting;\n }\n\n function shouldInvoke(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime;\n\n // Either this is the first call, activity has stopped and we're at the\n // trailing edge, the system time has gone backwards and we're treating\n // it as the trailing edge, or we've hit the `maxWait` limit.\n return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n }\n\n function timerExpired() {\n var time = now();\n if (shouldInvoke(time)) {\n return trailingEdge(time);\n }\n // Restart the timer.\n timerId = setTimeout(timerExpired, remainingWait(time));\n }\n\n function trailingEdge(time) {\n timerId = undefined;\n\n // Only invoke if we have `lastArgs` which means `func` has been\n // debounced at least once.\n if (trailing && lastArgs) {\n return invokeFunc(time);\n }\n lastArgs = lastThis = undefined;\n return result;\n }\n\n function cancel() {\n if (timerId !== undefined) {\n clearTimeout(timerId);\n }\n lastInvokeTime = 0;\n lastArgs = lastCallTime = lastThis = timerId = undefined;\n }\n\n function flush() {\n return timerId === undefined ? result : trailingEdge(now());\n }\n\n function debounced() {\n var time = now(),\n isInvoking = shouldInvoke(time);\n\n lastArgs = arguments;\n lastThis = this;\n lastCallTime = time;\n\n if (isInvoking) {\n if (timerId === undefined) {\n return leadingEdge(lastCallTime);\n }\n if (maxing) {\n // Handle invocations in a tight loop.\n clearTimeout(timerId);\n timerId = setTimeout(timerExpired, wait);\n return invokeFunc(lastCallTime);\n }\n }\n if (timerId === undefined) {\n timerId = setTimeout(timerExpired, wait);\n }\n return result;\n }\n debounced.cancel = cancel;\n debounced.flush = flush;\n return debounced;\n }\n\n /**\n * Defers invoking the `func` until the current call stack has cleared. Any\n * additional arguments are provided to `func` when it's invoked.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to defer.\n * @param {...*} [args] The arguments to invoke `func` with.\n * @returns {number} Returns the timer id.\n * @example\n *\n * _.defer(function(text) {\n * console.log(text);\n * }, 'deferred');\n * // => Logs 'deferred' after one millisecond.\n */\n var defer = baseRest(function(func, args) {\n return baseDelay(func, 1, args);\n });\n\n /**\n * Invokes `func` after `wait` milliseconds. Any additional arguments are\n * provided to `func` when it's invoked.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to delay.\n * @param {number} wait The number of milliseconds to delay invocation.\n * @param {...*} [args] The arguments to invoke `func` with.\n * @returns {number} Returns the timer id.\n * @example\n *\n * _.delay(function(text) {\n * console.log(text);\n * }, 1000, 'later');\n * // => Logs 'later' after one second.\n */\n var delay = baseRest(function(func, wait, args) {\n return baseDelay(func, toNumber(wait) || 0, args);\n });\n\n /**\n * Creates a function that invokes `func` with arguments reversed.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Function\n * @param {Function} func The function to flip arguments for.\n * @returns {Function} Returns the new flipped function.\n * @example\n *\n * var flipped = _.flip(function() {\n * return _.toArray(arguments);\n * });\n *\n * flipped('a', 'b', 'c', 'd');\n * // => ['d', 'c', 'b', 'a']\n */\n function flip(func) {\n return createWrap(func, WRAP_FLIP_FLAG);\n }\n\n /**\n * Creates a function that memoizes the result of `func`. If `resolver` is\n * provided, it determines the cache key for storing the result based on the\n * arguments provided to the memoized function. By default, the first argument\n * provided to the memoized function is used as the map cache key. The `func`\n * is invoked with the `this` binding of the memoized function.\n *\n * **Note:** The cache is exposed as the `cache` property on the memoized\n * function. Its creation may be customized by replacing the `_.memoize.Cache`\n * constructor with one whose instances implement the\n * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)\n * method interface of `clear`, `delete`, `get`, `has`, and `set`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to have its output memoized.\n * @param {Function} [resolver] The function to resolve the cache key.\n * @returns {Function} Returns the new memoized function.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n * var other = { 'c': 3, 'd': 4 };\n *\n * var values = _.memoize(_.values);\n * values(object);\n * // => [1, 2]\n *\n * values(other);\n * // => [3, 4]\n *\n * object.a = 2;\n * values(object);\n * // => [1, 2]\n *\n * // Modify the result cache.\n * values.cache.set(object, ['a', 'b']);\n * values(object);\n * // => ['a', 'b']\n *\n * // Replace `_.memoize.Cache`.\n * _.memoize.Cache = WeakMap;\n */\n function memoize(func, resolver) {\n if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n var memoized = function() {\n var args = arguments,\n key = resolver ? resolver.apply(this, args) : args[0],\n cache = memoized.cache;\n\n if (cache.has(key)) {\n return cache.get(key);\n }\n var result = func.apply(this, args);\n memoized.cache = cache.set(key, result) || cache;\n return result;\n };\n memoized.cache = new (memoize.Cache || MapCache);\n return memoized;\n }\n\n // Expose `MapCache`.\n memoize.Cache = MapCache;\n\n /**\n * Creates a function that negates the result of the predicate `func`. The\n * `func` predicate is invoked with the `this` binding and arguments of the\n * created function.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Function\n * @param {Function} predicate The predicate to negate.\n * @returns {Function} Returns the new negated function.\n * @example\n *\n * function isEven(n) {\n * return n % 2 == 0;\n * }\n *\n * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));\n * // => [1, 3, 5]\n */\n function negate(predicate) {\n if (typeof predicate != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n return function() {\n var args = arguments;\n switch (args.length) {\n case 0: return !predicate.call(this);\n case 1: return !predicate.call(this, args[0]);\n case 2: return !predicate.call(this, args[0], args[1]);\n case 3: return !predicate.call(this, args[0], args[1], args[2]);\n }\n return !predicate.apply(this, args);\n };\n }\n\n /**\n * Creates a function that is restricted to invoking `func` once. Repeat calls\n * to the function return the value of the first invocation. The `func` is\n * invoked with the `this` binding and arguments of the created function.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new restricted function.\n * @example\n *\n * var initialize = _.once(createApplication);\n * initialize();\n * initialize();\n * // => `createApplication` is invoked once\n */\n function once(func) {\n return before(2, func);\n }\n\n /**\n * Creates a function that invokes `func` with its arguments transformed.\n *\n * @static\n * @since 4.0.0\n * @memberOf _\n * @category Function\n * @param {Function} func The function to wrap.\n * @param {...(Function|Function[])} [transforms=[_.identity]]\n * The argument transforms.\n * @returns {Function} Returns the new function.\n * @example\n *\n * function doubled(n) {\n * return n * 2;\n * }\n *\n * function square(n) {\n * return n * n;\n * }\n *\n * var func = _.overArgs(function(x, y) {\n * return [x, y];\n * }, [square, doubled]);\n *\n * func(9, 3);\n * // => [81, 6]\n *\n * func(10, 5);\n * // => [100, 10]\n */\n var overArgs = castRest(function(func, transforms) {\n transforms = (transforms.length == 1 && isArray(transforms[0]))\n ? arrayMap(transforms[0], baseUnary(getIteratee()))\n : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));\n\n var funcsLength = transforms.length;\n return baseRest(function(args) {\n var index = -1,\n length = nativeMin(args.length, funcsLength);\n\n while (++index < length) {\n args[index] = transforms[index].call(this, args[index]);\n }\n return apply(func, this, args);\n });\n });\n\n /**\n * Creates a function that invokes `func` with `partials` prepended to the\n * arguments it receives. This method is like `_.bind` except it does **not**\n * alter the `this` binding.\n *\n * The `_.partial.placeholder` value, which defaults to `_` in monolithic\n * builds, may be used as a placeholder for partially applied arguments.\n *\n * **Note:** This method doesn't set the \"length\" property of partially\n * applied functions.\n *\n * @static\n * @memberOf _\n * @since 0.2.0\n * @category Function\n * @param {Function} func The function to partially apply arguments to.\n * @param {...*} [partials] The arguments to be partially applied.\n * @returns {Function} Returns the new partially applied function.\n * @example\n *\n * function greet(greeting, name) {\n * return greeting + ' ' + name;\n * }\n *\n * var sayHelloTo = _.partial(greet, 'hello');\n * sayHelloTo('fred');\n * // => 'hello fred'\n *\n * // Partially applied with placeholders.\n * var greetFred = _.partial(greet, _, 'fred');\n * greetFred('hi');\n * // => 'hi fred'\n */\n var partial = baseRest(function(func, partials) {\n var holders = replaceHolders(partials, getHolder(partial));\n return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);\n });\n\n /**\n * This method is like `_.partial` except that partially applied arguments\n * are appended to the arguments it receives.\n *\n * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic\n * builds, may be used as a placeholder for partially applied arguments.\n *\n * **Note:** This method doesn't set the \"length\" property of partially\n * applied functions.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Function\n * @param {Function} func The function to partially apply arguments to.\n * @param {...*} [partials] The arguments to be partially applied.\n * @returns {Function} Returns the new partially applied function.\n * @example\n *\n * function greet(greeting, name) {\n * return greeting + ' ' + name;\n * }\n *\n * var greetFred = _.partialRight(greet, 'fred');\n * greetFred('hi');\n * // => 'hi fred'\n *\n * // Partially applied with placeholders.\n * var sayHelloTo = _.partialRight(greet, 'hello', _);\n * sayHelloTo('fred');\n * // => 'hello fred'\n */\n var partialRight = baseRest(function(func, partials) {\n var holders = replaceHolders(partials, getHolder(partialRight));\n return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);\n });\n\n /**\n * Creates a function that invokes `func` with arguments arranged according\n * to the specified `indexes` where the argument value at the first index is\n * provided as the first argument, the argument value at the second index is\n * provided as the second argument, and so on.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Function\n * @param {Function} func The function to rearrange arguments for.\n * @param {...(number|number[])} indexes The arranged argument indexes.\n * @returns {Function} Returns the new function.\n * @example\n *\n * var rearged = _.rearg(function(a, b, c) {\n * return [a, b, c];\n * }, [2, 0, 1]);\n *\n * rearged('b', 'c', 'a')\n * // => ['a', 'b', 'c']\n */\n var rearg = flatRest(function(func, indexes) {\n return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);\n });\n\n /**\n * Creates a function that invokes `func` with the `this` binding of the\n * created function and arguments from `start` and beyond provided as\n * an array.\n *\n * **Note:** This method is based on the\n * [rest parameter](https://mdn.io/rest_parameters).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Function\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @returns {Function} Returns the new function.\n * @example\n *\n * var say = _.rest(function(what, names) {\n * return what + ' ' + _.initial(names).join(', ') +\n * (_.size(names) > 1 ? ', & ' : '') + _.last(names);\n * });\n *\n * say('hello', 'fred', 'barney', 'pebbles');\n * // => 'hello fred, barney, & pebbles'\n */\n function rest(func, start) {\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n start = start === undefined ? start : toInteger(start);\n return baseRest(func, start);\n }\n\n /**\n * Creates a function that invokes `func` with the `this` binding of the\n * create function and an array of arguments much like\n * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).\n *\n * **Note:** This method is based on the\n * [spread operator](https://mdn.io/spread_operator).\n *\n * @static\n * @memberOf _\n * @since 3.2.0\n * @category Function\n * @param {Function} func The function to spread arguments over.\n * @param {number} [start=0] The start position of the spread.\n * @returns {Function} Returns the new function.\n * @example\n *\n * var say = _.spread(function(who, what) {\n * return who + ' says ' + what;\n * });\n *\n * say(['fred', 'hello']);\n * // => 'fred says hello'\n *\n * var numbers = Promise.all([\n * Promise.resolve(40),\n * Promise.resolve(36)\n * ]);\n *\n * numbers.then(_.spread(function(x, y) {\n * return x + y;\n * }));\n * // => a Promise of 76\n */\n function spread(func, start) {\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n start = start == null ? 0 : nativeMax(toInteger(start), 0);\n return baseRest(function(args) {\n var array = args[start],\n otherArgs = castSlice(args, 0, start);\n\n if (array) {\n arrayPush(otherArgs, array);\n }\n return apply(func, this, otherArgs);\n });\n }\n\n /**\n * Creates a throttled function that only invokes `func` at most once per\n * every `wait` milliseconds. The throttled function comes with a `cancel`\n * method to cancel delayed `func` invocations and a `flush` method to\n * immediately invoke them. Provide `options` to indicate whether `func`\n * should be invoked on the leading and/or trailing edge of the `wait`\n * timeout. The `func` is invoked with the last arguments provided to the\n * throttled function. Subsequent calls to the throttled function return the\n * result of the last `func` invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the throttled function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.throttle` and `_.debounce`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to throttle.\n * @param {number} [wait=0] The number of milliseconds to throttle invocations to.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=true]\n * Specify invoking on the leading edge of the timeout.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new throttled function.\n * @example\n *\n * // Avoid excessively updating the position while scrolling.\n * jQuery(window).on('scroll', _.throttle(updatePosition, 100));\n *\n * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.\n * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });\n * jQuery(element).on('click', throttled);\n *\n * // Cancel the trailing throttled invocation.\n * jQuery(window).on('popstate', throttled.cancel);\n */\n function throttle(func, wait, options) {\n var leading = true,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n if (isObject(options)) {\n leading = 'leading' in options ? !!options.leading : leading;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n return debounce(func, wait, {\n 'leading': leading,\n 'maxWait': wait,\n 'trailing': trailing\n });\n }\n\n /**\n * Creates a function that accepts up to one argument, ignoring any\n * additional arguments.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Function\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n * @example\n *\n * _.map(['6', '8', '10'], _.unary(parseInt));\n * // => [6, 8, 10]\n */\n function unary(func) {\n return ary(func, 1);\n }\n\n /**\n * Creates a function that provides `value` to `wrapper` as its first\n * argument. Any additional arguments provided to the function are appended\n * to those provided to the `wrapper`. The wrapper is invoked with the `this`\n * binding of the created function.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {*} value The value to wrap.\n * @param {Function} [wrapper=identity] The wrapper function.\n * @returns {Function} Returns the new function.\n * @example\n *\n * var p = _.wrap(_.escape, function(func, text) {\n * return '' + func(text) + '
';\n * });\n *\n * p('fred, barney, & pebbles');\n * // => 'fred, barney, & pebbles
'\n */\n function wrap(value, wrapper) {\n return partial(castFunction(wrapper), value);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Casts `value` as an array if it's not one.\n *\n * @static\n * @memberOf _\n * @since 4.4.0\n * @category Lang\n * @param {*} value The value to inspect.\n * @returns {Array} Returns the cast array.\n * @example\n *\n * _.castArray(1);\n * // => [1]\n *\n * _.castArray({ 'a': 1 });\n * // => [{ 'a': 1 }]\n *\n * _.castArray('abc');\n * // => ['abc']\n *\n * _.castArray(null);\n * // => [null]\n *\n * _.castArray(undefined);\n * // => [undefined]\n *\n * _.castArray();\n * // => []\n *\n * var array = [1, 2, 3];\n * console.log(_.castArray(array) === array);\n * // => true\n */\n function castArray() {\n if (!arguments.length) {\n return [];\n }\n var value = arguments[0];\n return isArray(value) ? value : [value];\n }\n\n /**\n * Creates a shallow clone of `value`.\n *\n * **Note:** This method is loosely based on the\n * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)\n * and supports cloning arrays, array buffers, booleans, date objects, maps,\n * numbers, `Object` objects, regexes, sets, strings, symbols, and typed\n * arrays. The own enumerable properties of `arguments` objects are cloned\n * as plain objects. An empty object is returned for uncloneable values such\n * as error objects, functions, DOM nodes, and WeakMaps.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to clone.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeep\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var shallow = _.clone(objects);\n * console.log(shallow[0] === objects[0]);\n * // => true\n */\n function clone(value) {\n return baseClone(value, CLONE_SYMBOLS_FLAG);\n }\n\n /**\n * This method is like `_.clone` except that it accepts `customizer` which\n * is invoked to produce the cloned value. If `customizer` returns `undefined`,\n * cloning is handled by the method instead. The `customizer` is invoked with\n * up to four arguments; (value [, index|key, object, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeepWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(false);\n * }\n * }\n *\n * var el = _.cloneWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 0\n */\n function cloneWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);\n }\n\n /**\n * This method is like `_.clone` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @returns {*} Returns the deep cloned value.\n * @see _.clone\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var deep = _.cloneDeep(objects);\n * console.log(deep[0] === objects[0]);\n * // => false\n */\n function cloneDeep(value) {\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n }\n\n /**\n * This method is like `_.cloneWith` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the deep cloned value.\n * @see _.cloneWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(true);\n * }\n * }\n *\n * var el = _.cloneDeepWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 20\n */\n function cloneDeepWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);\n }\n\n /**\n * Checks if `object` conforms to `source` by invoking the predicate\n * properties of `source` with the corresponding property values of `object`.\n *\n * **Note:** This method is equivalent to `_.conforms` when `source` is\n * partially applied.\n *\n * @static\n * @memberOf _\n * @since 4.14.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property predicates to conform to.\n * @returns {boolean} Returns `true` if `object` conforms, else `false`.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n *\n * _.conformsTo(object, { 'b': function(n) { return n > 1; } });\n * // => true\n *\n * _.conformsTo(object, { 'b': function(n) { return n > 2; } });\n * // => false\n */\n function conformsTo(object, source) {\n return source == null || baseConformsTo(object, source, keys(source));\n }\n\n /**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\n function eq(value, other) {\n return value === other || (value !== value && other !== other);\n }\n\n /**\n * Checks if `value` is greater than `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is greater than `other`,\n * else `false`.\n * @see _.lt\n * @example\n *\n * _.gt(3, 1);\n * // => true\n *\n * _.gt(3, 3);\n * // => false\n *\n * _.gt(1, 3);\n * // => false\n */\n var gt = createRelationalOperation(baseGt);\n\n /**\n * Checks if `value` is greater than or equal to `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is greater than or equal to\n * `other`, else `false`.\n * @see _.lte\n * @example\n *\n * _.gte(3, 1);\n * // => true\n *\n * _.gte(3, 3);\n * // => true\n *\n * _.gte(1, 3);\n * // => false\n */\n var gte = createRelationalOperation(function(value, other) {\n return value >= other;\n });\n\n /**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n * else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\n var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n !propertyIsEnumerable.call(value, 'callee');\n };\n\n /**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\n var isArray = Array.isArray;\n\n /**\n * Checks if `value` is classified as an `ArrayBuffer` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.\n * @example\n *\n * _.isArrayBuffer(new ArrayBuffer(2));\n * // => true\n *\n * _.isArrayBuffer(new Array(2));\n * // => false\n */\n var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;\n\n /**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\n function isArrayLike(value) {\n return value != null && isLength(value.length) && !isFunction(value);\n }\n\n /**\n * This method is like `_.isArrayLike` except that it also checks if `value`\n * is an object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array-like object,\n * else `false`.\n * @example\n *\n * _.isArrayLikeObject([1, 2, 3]);\n * // => true\n *\n * _.isArrayLikeObject(document.body.children);\n * // => true\n *\n * _.isArrayLikeObject('abc');\n * // => false\n *\n * _.isArrayLikeObject(_.noop);\n * // => false\n */\n function isArrayLikeObject(value) {\n return isObjectLike(value) && isArrayLike(value);\n }\n\n /**\n * Checks if `value` is classified as a boolean primitive or object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.\n * @example\n *\n * _.isBoolean(false);\n * // => true\n *\n * _.isBoolean(null);\n * // => false\n */\n function isBoolean(value) {\n return value === true || value === false ||\n (isObjectLike(value) && baseGetTag(value) == boolTag);\n }\n\n /**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\n var isBuffer = nativeIsBuffer || stubFalse;\n\n /**\n * Checks if `value` is classified as a `Date` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a date object, else `false`.\n * @example\n *\n * _.isDate(new Date);\n * // => true\n *\n * _.isDate('Mon April 23 2012');\n * // => false\n */\n var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;\n\n /**\n * Checks if `value` is likely a DOM element.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.\n * @example\n *\n * _.isElement(document.body);\n * // => true\n *\n * _.isElement('');\n * // => false\n */\n function isElement(value) {\n return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);\n }\n\n /**\n * Checks if `value` is an empty object, collection, map, or set.\n *\n * Objects are considered empty if they have no own enumerable string keyed\n * properties.\n *\n * Array-like values such as `arguments` objects, arrays, buffers, strings, or\n * jQuery-like collections are considered empty if they have a `length` of `0`.\n * Similarly, maps and sets are considered empty if they have a `size` of `0`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is empty, else `false`.\n * @example\n *\n * _.isEmpty(null);\n * // => true\n *\n * _.isEmpty(true);\n * // => true\n *\n * _.isEmpty(1);\n * // => true\n *\n * _.isEmpty([1, 2, 3]);\n * // => false\n *\n * _.isEmpty({ 'a': 1 });\n * // => false\n */\n function isEmpty(value) {\n if (value == null) {\n return true;\n }\n if (isArrayLike(value) &&\n (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||\n isBuffer(value) || isTypedArray(value) || isArguments(value))) {\n return !value.length;\n }\n var tag = getTag(value);\n if (tag == mapTag || tag == setTag) {\n return !value.size;\n }\n if (isPrototype(value)) {\n return !baseKeys(value).length;\n }\n for (var key in value) {\n if (hasOwnProperty.call(value, key)) {\n return false;\n }\n }\n return true;\n }\n\n /**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\n function isEqual(value, other) {\n return baseIsEqual(value, other);\n }\n\n /**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\n function isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n }\n\n /**\n * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,\n * `SyntaxError`, `TypeError`, or `URIError` object.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an error object, else `false`.\n * @example\n *\n * _.isError(new Error);\n * // => true\n *\n * _.isError(Error);\n * // => false\n */\n function isError(value) {\n if (!isObjectLike(value)) {\n return false;\n }\n var tag = baseGetTag(value);\n return tag == errorTag || tag == domExcTag ||\n (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));\n }\n\n /**\n * Checks if `value` is a finite primitive number.\n *\n * **Note:** This method is based on\n * [`Number.isFinite`](https://mdn.io/Number/isFinite).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.\n * @example\n *\n * _.isFinite(3);\n * // => true\n *\n * _.isFinite(Number.MIN_VALUE);\n * // => true\n *\n * _.isFinite(Infinity);\n * // => false\n *\n * _.isFinite('3');\n * // => false\n */\n function isFinite(value) {\n return typeof value == 'number' && nativeIsFinite(value);\n }\n\n /**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\n function isFunction(value) {\n if (!isObject(value)) {\n return false;\n }\n // The use of `Object#toString` avoids issues with the `typeof` operator\n // in Safari 9 which returns 'object' for typed arrays and other constructors.\n var tag = baseGetTag(value);\n return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n }\n\n /**\n * Checks if `value` is an integer.\n *\n * **Note:** This method is based on\n * [`Number.isInteger`](https://mdn.io/Number/isInteger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an integer, else `false`.\n * @example\n *\n * _.isInteger(3);\n * // => true\n *\n * _.isInteger(Number.MIN_VALUE);\n * // => false\n *\n * _.isInteger(Infinity);\n * // => false\n *\n * _.isInteger('3');\n * // => false\n */\n function isInteger(value) {\n return typeof value == 'number' && value == toInteger(value);\n }\n\n /**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\n function isLength(value) {\n return typeof value == 'number' &&\n value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n }\n\n /**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\n function isObject(value) {\n var type = typeof value;\n return value != null && (type == 'object' || type == 'function');\n }\n\n /**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\n function isObjectLike(value) {\n return value != null && typeof value == 'object';\n }\n\n /**\n * Checks if `value` is classified as a `Map` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n * @example\n *\n * _.isMap(new Map);\n * // => true\n *\n * _.isMap(new WeakMap);\n * // => false\n */\n var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\n /**\n * Performs a partial deep comparison between `object` and `source` to\n * determine if `object` contains equivalent property values.\n *\n * **Note:** This method is equivalent to `_.matches` when `source` is\n * partially applied.\n *\n * Partial comparisons will match empty array and empty object `source`\n * values against any array or object value, respectively. See `_.isEqual`\n * for a list of supported value comparisons.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property values to match.\n * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n *\n * _.isMatch(object, { 'b': 2 });\n * // => true\n *\n * _.isMatch(object, { 'b': 1 });\n * // => false\n */\n function isMatch(object, source) {\n return object === source || baseIsMatch(object, source, getMatchData(source));\n }\n\n /**\n * This method is like `_.isMatch` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with five\n * arguments: (objValue, srcValue, index|key, object, source).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property values to match.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, srcValue) {\n * if (isGreeting(objValue) && isGreeting(srcValue)) {\n * return true;\n * }\n * }\n *\n * var object = { 'greeting': 'hello' };\n * var source = { 'greeting': 'hi' };\n *\n * _.isMatchWith(object, source, customizer);\n * // => true\n */\n function isMatchWith(object, source, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseIsMatch(object, source, getMatchData(source), customizer);\n }\n\n /**\n * Checks if `value` is `NaN`.\n *\n * **Note:** This method is based on\n * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as\n * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for\n * `undefined` and other non-number values.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n * @example\n *\n * _.isNaN(NaN);\n * // => true\n *\n * _.isNaN(new Number(NaN));\n * // => true\n *\n * isNaN(undefined);\n * // => true\n *\n * _.isNaN(undefined);\n * // => false\n */\n function isNaN(value) {\n // An `NaN` primitive is the only value that is not equal to itself.\n // Perform the `toStringTag` check first to avoid errors with some\n // ActiveX objects in IE.\n return isNumber(value) && value != +value;\n }\n\n /**\n * Checks if `value` is a pristine native function.\n *\n * **Note:** This method can't reliably detect native functions in the presence\n * of the core-js package because core-js circumvents this kind of detection.\n * Despite multiple requests, the core-js maintainer has made it clear: any\n * attempt to fix the detection will be obstructed. As a result, we're left\n * with little choice but to throw an error. Unfortunately, this also affects\n * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),\n * which rely on core-js.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n * @example\n *\n * _.isNative(Array.prototype.push);\n * // => true\n *\n * _.isNative(_);\n * // => false\n */\n function isNative(value) {\n if (isMaskable(value)) {\n throw new Error(CORE_ERROR_TEXT);\n }\n return baseIsNative(value);\n }\n\n /**\n * Checks if `value` is `null`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `null`, else `false`.\n * @example\n *\n * _.isNull(null);\n * // => true\n *\n * _.isNull(void 0);\n * // => false\n */\n function isNull(value) {\n return value === null;\n }\n\n /**\n * Checks if `value` is `null` or `undefined`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is nullish, else `false`.\n * @example\n *\n * _.isNil(null);\n * // => true\n *\n * _.isNil(void 0);\n * // => true\n *\n * _.isNil(NaN);\n * // => false\n */\n function isNil(value) {\n return value == null;\n }\n\n /**\n * Checks if `value` is classified as a `Number` primitive or object.\n *\n * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are\n * classified as numbers, use the `_.isFinite` method.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a number, else `false`.\n * @example\n *\n * _.isNumber(3);\n * // => true\n *\n * _.isNumber(Number.MIN_VALUE);\n * // => true\n *\n * _.isNumber(Infinity);\n * // => true\n *\n * _.isNumber('3');\n * // => false\n */\n function isNumber(value) {\n return typeof value == 'number' ||\n (isObjectLike(value) && baseGetTag(value) == numberTag);\n }\n\n /**\n * Checks if `value` is a plain object, that is, an object created by the\n * `Object` constructor or one with a `[[Prototype]]` of `null`.\n *\n * @static\n * @memberOf _\n * @since 0.8.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * _.isPlainObject(new Foo);\n * // => false\n *\n * _.isPlainObject([1, 2, 3]);\n * // => false\n *\n * _.isPlainObject({ 'x': 0, 'y': 0 });\n * // => true\n *\n * _.isPlainObject(Object.create(null));\n * // => true\n */\n function isPlainObject(value) {\n if (!isObjectLike(value) || baseGetTag(value) != objectTag) {\n return false;\n }\n var proto = getPrototype(value);\n if (proto === null) {\n return true;\n }\n var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;\n return typeof Ctor == 'function' && Ctor instanceof Ctor &&\n funcToString.call(Ctor) == objectCtorString;\n }\n\n /**\n * Checks if `value` is classified as a `RegExp` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.\n * @example\n *\n * _.isRegExp(/abc/);\n * // => true\n *\n * _.isRegExp('/abc/');\n * // => false\n */\n var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;\n\n /**\n * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754\n * double precision number which isn't the result of a rounded unsafe integer.\n *\n * **Note:** This method is based on\n * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.\n * @example\n *\n * _.isSafeInteger(3);\n * // => true\n *\n * _.isSafeInteger(Number.MIN_VALUE);\n * // => false\n *\n * _.isSafeInteger(Infinity);\n * // => false\n *\n * _.isSafeInteger('3');\n * // => false\n */\n function isSafeInteger(value) {\n return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;\n }\n\n /**\n * Checks if `value` is classified as a `Set` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n * @example\n *\n * _.isSet(new Set);\n * // => true\n *\n * _.isSet(new WeakSet);\n * // => false\n */\n var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\n /**\n * Checks if `value` is classified as a `String` primitive or object.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a string, else `false`.\n * @example\n *\n * _.isString('abc');\n * // => true\n *\n * _.isString(1);\n * // => false\n */\n function isString(value) {\n return typeof value == 'string' ||\n (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);\n }\n\n /**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\n function isSymbol(value) {\n return typeof value == 'symbol' ||\n (isObjectLike(value) && baseGetTag(value) == symbolTag);\n }\n\n /**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\n var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\n /**\n * Checks if `value` is `undefined`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.\n * @example\n *\n * _.isUndefined(void 0);\n * // => true\n *\n * _.isUndefined(null);\n * // => false\n */\n function isUndefined(value) {\n return value === undefined;\n }\n\n /**\n * Checks if `value` is classified as a `WeakMap` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.\n * @example\n *\n * _.isWeakMap(new WeakMap);\n * // => true\n *\n * _.isWeakMap(new Map);\n * // => false\n */\n function isWeakMap(value) {\n return isObjectLike(value) && getTag(value) == weakMapTag;\n }\n\n /**\n * Checks if `value` is classified as a `WeakSet` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.\n * @example\n *\n * _.isWeakSet(new WeakSet);\n * // => true\n *\n * _.isWeakSet(new Set);\n * // => false\n */\n function isWeakSet(value) {\n return isObjectLike(value) && baseGetTag(value) == weakSetTag;\n }\n\n /**\n * Checks if `value` is less than `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is less than `other`,\n * else `false`.\n * @see _.gt\n * @example\n *\n * _.lt(1, 3);\n * // => true\n *\n * _.lt(3, 3);\n * // => false\n *\n * _.lt(3, 1);\n * // => false\n */\n var lt = createRelationalOperation(baseLt);\n\n /**\n * Checks if `value` is less than or equal to `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is less than or equal to\n * `other`, else `false`.\n * @see _.gte\n * @example\n *\n * _.lte(1, 3);\n * // => true\n *\n * _.lte(3, 3);\n * // => true\n *\n * _.lte(3, 1);\n * // => false\n */\n var lte = createRelationalOperation(function(value, other) {\n return value <= other;\n });\n\n /**\n * Converts `value` to an array.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {Array} Returns the converted array.\n * @example\n *\n * _.toArray({ 'a': 1, 'b': 2 });\n * // => [1, 2]\n *\n * _.toArray('abc');\n * // => ['a', 'b', 'c']\n *\n * _.toArray(1);\n * // => []\n *\n * _.toArray(null);\n * // => []\n */\n function toArray(value) {\n if (!value) {\n return [];\n }\n if (isArrayLike(value)) {\n return isString(value) ? stringToArray(value) : copyArray(value);\n }\n if (symIterator && value[symIterator]) {\n return iteratorToArray(value[symIterator]());\n }\n var tag = getTag(value),\n func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);\n\n return func(value);\n }\n\n /**\n * Converts `value` to a finite number.\n *\n * @static\n * @memberOf _\n * @since 4.12.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted number.\n * @example\n *\n * _.toFinite(3.2);\n * // => 3.2\n *\n * _.toFinite(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toFinite(Infinity);\n * // => 1.7976931348623157e+308\n *\n * _.toFinite('3.2');\n * // => 3.2\n */\n function toFinite(value) {\n if (!value) {\n return value === 0 ? value : 0;\n }\n value = toNumber(value);\n if (value === INFINITY || value === -INFINITY) {\n var sign = (value < 0 ? -1 : 1);\n return sign * MAX_INTEGER;\n }\n return value === value ? value : 0;\n }\n\n /**\n * Converts `value` to an integer.\n *\n * **Note:** This method is loosely based on\n * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toInteger(3.2);\n * // => 3\n *\n * _.toInteger(Number.MIN_VALUE);\n * // => 0\n *\n * _.toInteger(Infinity);\n * // => 1.7976931348623157e+308\n *\n * _.toInteger('3.2');\n * // => 3\n */\n function toInteger(value) {\n var result = toFinite(value),\n remainder = result % 1;\n\n return result === result ? (remainder ? result - remainder : result) : 0;\n }\n\n /**\n * Converts `value` to an integer suitable for use as the length of an\n * array-like object.\n *\n * **Note:** This method is based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toLength(3.2);\n * // => 3\n *\n * _.toLength(Number.MIN_VALUE);\n * // => 0\n *\n * _.toLength(Infinity);\n * // => 4294967295\n *\n * _.toLength('3.2');\n * // => 3\n */\n function toLength(value) {\n return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;\n }\n\n /**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\n function toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = baseTrim(value);\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n }\n\n /**\n * Converts `value` to a plain object flattening inherited enumerable string\n * keyed properties of `value` to own properties of the plain object.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {Object} Returns the converted plain object.\n * @example\n *\n * function Foo() {\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.assign({ 'a': 1 }, new Foo);\n * // => { 'a': 1, 'b': 2 }\n *\n * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));\n * // => { 'a': 1, 'b': 2, 'c': 3 }\n */\n function toPlainObject(value) {\n return copyObject(value, keysIn(value));\n }\n\n /**\n * Converts `value` to a safe integer. A safe integer can be compared and\n * represented correctly.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toSafeInteger(3.2);\n * // => 3\n *\n * _.toSafeInteger(Number.MIN_VALUE);\n * // => 0\n *\n * _.toSafeInteger(Infinity);\n * // => 9007199254740991\n *\n * _.toSafeInteger('3.2');\n * // => 3\n */\n function toSafeInteger(value) {\n return value\n ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)\n : (value === 0 ? value : 0);\n }\n\n /**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\n function toString(value) {\n return value == null ? '' : baseToString(value);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Assigns own enumerable string keyed properties of source objects to the\n * destination object. Source objects are applied from left to right.\n * Subsequent sources overwrite property assignments of previous sources.\n *\n * **Note:** This method mutates `object` and is loosely based on\n * [`Object.assign`](https://mdn.io/Object/assign).\n *\n * @static\n * @memberOf _\n * @since 0.10.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assignIn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assign({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'c': 3 }\n */\n var assign = createAssigner(function(object, source) {\n if (isPrototype(source) || isArrayLike(source)) {\n copyObject(source, keys(source), object);\n return;\n }\n for (var key in source) {\n if (hasOwnProperty.call(source, key)) {\n assignValue(object, key, source[key]);\n }\n }\n });\n\n /**\n * This method is like `_.assign` except that it iterates over own and\n * inherited source properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extend\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assign\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assignIn({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }\n */\n var assignIn = createAssigner(function(object, source) {\n copyObject(source, keysIn(source), object);\n });\n\n /**\n * This method is like `_.assignIn` except that it accepts `customizer`\n * which is invoked to produce the assigned values. If `customizer` returns\n * `undefined`, assignment is handled by the method instead. The `customizer`\n * is invoked with five arguments: (objValue, srcValue, key, object, source).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extendWith\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @see _.assignWith\n * @example\n *\n * function customizer(objValue, srcValue) {\n * return _.isUndefined(objValue) ? srcValue : objValue;\n * }\n *\n * var defaults = _.partialRight(_.assignInWith, customizer);\n *\n * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {\n copyObject(source, keysIn(source), object, customizer);\n });\n\n /**\n * This method is like `_.assign` except that it accepts `customizer`\n * which is invoked to produce the assigned values. If `customizer` returns\n * `undefined`, assignment is handled by the method instead. The `customizer`\n * is invoked with five arguments: (objValue, srcValue, key, object, source).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @see _.assignInWith\n * @example\n *\n * function customizer(objValue, srcValue) {\n * return _.isUndefined(objValue) ? srcValue : objValue;\n * }\n *\n * var defaults = _.partialRight(_.assignWith, customizer);\n *\n * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var assignWith = createAssigner(function(object, source, srcIndex, customizer) {\n copyObject(source, keys(source), object, customizer);\n });\n\n /**\n * Creates an array of values corresponding to `paths` of `object`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {...(string|string[])} [paths] The property paths to pick.\n * @returns {Array} Returns the picked values.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };\n *\n * _.at(object, ['a[0].b.c', 'a[1]']);\n * // => [3, 4]\n */\n var at = flatRest(baseAt);\n\n /**\n * Creates an object that inherits from the `prototype` object. If a\n * `properties` object is given, its own enumerable string keyed properties\n * are assigned to the created object.\n *\n * @static\n * @memberOf _\n * @since 2.3.0\n * @category Object\n * @param {Object} prototype The object to inherit from.\n * @param {Object} [properties] The properties to assign to the object.\n * @returns {Object} Returns the new object.\n * @example\n *\n * function Shape() {\n * this.x = 0;\n * this.y = 0;\n * }\n *\n * function Circle() {\n * Shape.call(this);\n * }\n *\n * Circle.prototype = _.create(Shape.prototype, {\n * 'constructor': Circle\n * });\n *\n * var circle = new Circle;\n * circle instanceof Circle;\n * // => true\n *\n * circle instanceof Shape;\n * // => true\n */\n function create(prototype, properties) {\n var result = baseCreate(prototype);\n return properties == null ? result : baseAssign(result, properties);\n }\n\n /**\n * Assigns own and inherited enumerable string keyed properties of source\n * objects to the destination object for all destination properties that\n * resolve to `undefined`. Source objects are applied from left to right.\n * Once a property is set, additional values of the same property are ignored.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.defaultsDeep\n * @example\n *\n * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var defaults = baseRest(function(object, sources) {\n object = Object(object);\n\n var index = -1;\n var length = sources.length;\n var guard = length > 2 ? sources[2] : undefined;\n\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n length = 1;\n }\n\n while (++index < length) {\n var source = sources[index];\n var props = keysIn(source);\n var propsIndex = -1;\n var propsLength = props.length;\n\n while (++propsIndex < propsLength) {\n var key = props[propsIndex];\n var value = object[key];\n\n if (value === undefined ||\n (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {\n object[key] = source[key];\n }\n }\n }\n\n return object;\n });\n\n /**\n * This method is like `_.defaults` except that it recursively assigns\n * default properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 3.10.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.defaults\n * @example\n *\n * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });\n * // => { 'a': { 'b': 2, 'c': 3 } }\n */\n var defaultsDeep = baseRest(function(args) {\n args.push(undefined, customDefaultsMerge);\n return apply(mergeWith, undefined, args);\n });\n\n /**\n * This method is like `_.find` except that it returns the key of the first\n * element `predicate` returns truthy for instead of the element itself.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {string|undefined} Returns the key of the matched element,\n * else `undefined`.\n * @example\n *\n * var users = {\n * 'barney': { 'age': 36, 'active': true },\n * 'fred': { 'age': 40, 'active': false },\n * 'pebbles': { 'age': 1, 'active': true }\n * };\n *\n * _.findKey(users, function(o) { return o.age < 40; });\n * // => 'barney' (iteration order is not guaranteed)\n *\n * // The `_.matches` iteratee shorthand.\n * _.findKey(users, { 'age': 1, 'active': true });\n * // => 'pebbles'\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findKey(users, ['active', false]);\n * // => 'fred'\n *\n * // The `_.property` iteratee shorthand.\n * _.findKey(users, 'active');\n * // => 'barney'\n */\n function findKey(object, predicate) {\n return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);\n }\n\n /**\n * This method is like `_.findKey` except that it iterates over elements of\n * a collection in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {string|undefined} Returns the key of the matched element,\n * else `undefined`.\n * @example\n *\n * var users = {\n * 'barney': { 'age': 36, 'active': true },\n * 'fred': { 'age': 40, 'active': false },\n * 'pebbles': { 'age': 1, 'active': true }\n * };\n *\n * _.findLastKey(users, function(o) { return o.age < 40; });\n * // => returns 'pebbles' assuming `_.findKey` returns 'barney'\n *\n * // The `_.matches` iteratee shorthand.\n * _.findLastKey(users, { 'age': 36, 'active': true });\n * // => 'barney'\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findLastKey(users, ['active', false]);\n * // => 'fred'\n *\n * // The `_.property` iteratee shorthand.\n * _.findLastKey(users, 'active');\n * // => 'pebbles'\n */\n function findLastKey(object, predicate) {\n return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);\n }\n\n /**\n * Iterates over own and inherited enumerable string keyed properties of an\n * object and invokes `iteratee` for each property. The iteratee is invoked\n * with three arguments: (value, key, object). Iteratee functions may exit\n * iteration early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 0.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forInRight\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forIn(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).\n */\n function forIn(object, iteratee) {\n return object == null\n ? object\n : baseFor(object, getIteratee(iteratee, 3), keysIn);\n }\n\n /**\n * This method is like `_.forIn` except that it iterates over properties of\n * `object` in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forIn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forInRight(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.\n */\n function forInRight(object, iteratee) {\n return object == null\n ? object\n : baseForRight(object, getIteratee(iteratee, 3), keysIn);\n }\n\n /**\n * Iterates over own enumerable string keyed properties of an object and\n * invokes `iteratee` for each property. The iteratee is invoked with three\n * arguments: (value, key, object). Iteratee functions may exit iteration\n * early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 0.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forOwnRight\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forOwn(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'a' then 'b' (iteration order is not guaranteed).\n */\n function forOwn(object, iteratee) {\n return object && baseForOwn(object, getIteratee(iteratee, 3));\n }\n\n /**\n * This method is like `_.forOwn` except that it iterates over properties of\n * `object` in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forOwn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forOwnRight(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.\n */\n function forOwnRight(object, iteratee) {\n return object && baseForOwnRight(object, getIteratee(iteratee, 3));\n }\n\n /**\n * Creates an array of function property names from own enumerable properties\n * of `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns the function names.\n * @see _.functionsIn\n * @example\n *\n * function Foo() {\n * this.a = _.constant('a');\n * this.b = _.constant('b');\n * }\n *\n * Foo.prototype.c = _.constant('c');\n *\n * _.functions(new Foo);\n * // => ['a', 'b']\n */\n function functions(object) {\n return object == null ? [] : baseFunctions(object, keys(object));\n }\n\n /**\n * Creates an array of function property names from own and inherited\n * enumerable properties of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns the function names.\n * @see _.functions\n * @example\n *\n * function Foo() {\n * this.a = _.constant('a');\n * this.b = _.constant('b');\n * }\n *\n * Foo.prototype.c = _.constant('c');\n *\n * _.functionsIn(new Foo);\n * // => ['a', 'b', 'c']\n */\n function functionsIn(object) {\n return object == null ? [] : baseFunctions(object, keysIn(object));\n }\n\n /**\n * Gets the value at `path` of `object`. If the resolved value is\n * `undefined`, the `defaultValue` is returned in its place.\n *\n * @static\n * @memberOf _\n * @since 3.7.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to get.\n * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n * @returns {*} Returns the resolved value.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.get(object, 'a[0].b.c');\n * // => 3\n *\n * _.get(object, ['a', '0', 'b', 'c']);\n * // => 3\n *\n * _.get(object, 'a.b.c', 'default');\n * // => 'default'\n */\n function get(object, path, defaultValue) {\n var result = object == null ? undefined : baseGet(object, path);\n return result === undefined ? defaultValue : result;\n }\n\n /**\n * Checks if `path` is a direct property of `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path to check.\n * @returns {boolean} Returns `true` if `path` exists, else `false`.\n * @example\n *\n * var object = { 'a': { 'b': 2 } };\n * var other = _.create({ 'a': _.create({ 'b': 2 }) });\n *\n * _.has(object, 'a');\n * // => true\n *\n * _.has(object, 'a.b');\n * // => true\n *\n * _.has(object, ['a', 'b']);\n * // => true\n *\n * _.has(other, 'a');\n * // => false\n */\n function has(object, path) {\n return object != null && hasPath(object, path, baseHas);\n }\n\n /**\n * Checks if `path` is a direct or inherited property of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path to check.\n * @returns {boolean} Returns `true` if `path` exists, else `false`.\n * @example\n *\n * var object = _.create({ 'a': _.create({ 'b': 2 }) });\n *\n * _.hasIn(object, 'a');\n * // => true\n *\n * _.hasIn(object, 'a.b');\n * // => true\n *\n * _.hasIn(object, ['a', 'b']);\n * // => true\n *\n * _.hasIn(object, 'b');\n * // => false\n */\n function hasIn(object, path) {\n return object != null && hasPath(object, path, baseHasIn);\n }\n\n /**\n * Creates an object composed of the inverted keys and values of `object`.\n * If `object` contains duplicate values, subsequent values overwrite\n * property assignments of previous values.\n *\n * @static\n * @memberOf _\n * @since 0.7.0\n * @category Object\n * @param {Object} object The object to invert.\n * @returns {Object} Returns the new inverted object.\n * @example\n *\n * var object = { 'a': 1, 'b': 2, 'c': 1 };\n *\n * _.invert(object);\n * // => { '1': 'c', '2': 'b' }\n */\n var invert = createInverter(function(result, value, key) {\n if (value != null &&\n typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\n }\n\n result[value] = key;\n }, constant(identity));\n\n /**\n * This method is like `_.invert` except that the inverted object is generated\n * from the results of running each element of `object` thru `iteratee`. The\n * corresponding inverted value of each inverted key is an array of keys\n * responsible for generating the inverted value. The iteratee is invoked\n * with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.1.0\n * @category Object\n * @param {Object} object The object to invert.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Object} Returns the new inverted object.\n * @example\n *\n * var object = { 'a': 1, 'b': 2, 'c': 1 };\n *\n * _.invertBy(object);\n * // => { '1': ['a', 'c'], '2': ['b'] }\n *\n * _.invertBy(object, function(value) {\n * return 'group' + value;\n * });\n * // => { 'group1': ['a', 'c'], 'group2': ['b'] }\n */\n var invertBy = createInverter(function(result, value, key) {\n if (value != null &&\n typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\n }\n\n if (hasOwnProperty.call(result, value)) {\n result[value].push(key);\n } else {\n result[value] = [key];\n }\n }, getIteratee);\n\n /**\n * Invokes the method at `path` of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the method to invoke.\n * @param {...*} [args] The arguments to invoke the method with.\n * @returns {*} Returns the result of the invoked method.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };\n *\n * _.invoke(object, 'a[0].b.c.slice', 1, 3);\n * // => [2, 3]\n */\n var invoke = baseRest(baseInvoke);\n\n /**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\n function keys(object) {\n return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n }\n\n /**\n * Creates an array of the own and inherited enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keysIn(new Foo);\n * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n */\n function keysIn(object) {\n return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n }\n\n /**\n * The opposite of `_.mapValues`; this method creates an object with the\n * same values as `object` and keys generated by running each own enumerable\n * string keyed property of `object` thru `iteratee`. The iteratee is invoked\n * with three arguments: (value, key, object).\n *\n * @static\n * @memberOf _\n * @since 3.8.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns the new mapped object.\n * @see _.mapValues\n * @example\n *\n * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {\n * return key + value;\n * });\n * // => { 'a1': 1, 'b2': 2 }\n */\n function mapKeys(object, iteratee) {\n var result = {};\n iteratee = getIteratee(iteratee, 3);\n\n baseForOwn(object, function(value, key, object) {\n baseAssignValue(result, iteratee(value, key, object), value);\n });\n return result;\n }\n\n /**\n * Creates an object with the same keys as `object` and values generated\n * by running each own enumerable string keyed property of `object` thru\n * `iteratee`. The iteratee is invoked with three arguments:\n * (value, key, object).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns the new mapped object.\n * @see _.mapKeys\n * @example\n *\n * var users = {\n * 'fred': { 'user': 'fred', 'age': 40 },\n * 'pebbles': { 'user': 'pebbles', 'age': 1 }\n * };\n *\n * _.mapValues(users, function(o) { return o.age; });\n * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n *\n * // The `_.property` iteratee shorthand.\n * _.mapValues(users, 'age');\n * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n */\n function mapValues(object, iteratee) {\n var result = {};\n iteratee = getIteratee(iteratee, 3);\n\n baseForOwn(object, function(value, key, object) {\n baseAssignValue(result, key, iteratee(value, key, object));\n });\n return result;\n }\n\n /**\n * This method is like `_.assign` except that it recursively merges own and\n * inherited enumerable string keyed properties of source objects into the\n * destination object. Source properties that resolve to `undefined` are\n * skipped if a destination value exists. Array and plain object properties\n * are merged recursively. Other objects and value types are overridden by\n * assignment. Source objects are applied from left to right. Subsequent\n * sources overwrite property assignments of previous sources.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 0.5.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {\n * 'a': [{ 'b': 2 }, { 'd': 4 }]\n * };\n *\n * var other = {\n * 'a': [{ 'c': 3 }, { 'e': 5 }]\n * };\n *\n * _.merge(object, other);\n * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }\n */\n var merge = createAssigner(function(object, source, srcIndex) {\n baseMerge(object, source, srcIndex);\n });\n\n /**\n * This method is like `_.merge` except that it accepts `customizer` which\n * is invoked to produce the merged values of the destination and source\n * properties. If `customizer` returns `undefined`, merging is handled by the\n * method instead. The `customizer` is invoked with six arguments:\n * (objValue, srcValue, key, object, source, stack).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} customizer The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * function customizer(objValue, srcValue) {\n * if (_.isArray(objValue)) {\n * return objValue.concat(srcValue);\n * }\n * }\n *\n * var object = { 'a': [1], 'b': [2] };\n * var other = { 'a': [3], 'b': [4] };\n *\n * _.mergeWith(object, other, customizer);\n * // => { 'a': [1, 3], 'b': [2, 4] }\n */\n var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {\n baseMerge(object, source, srcIndex, customizer);\n });\n\n /**\n * The opposite of `_.pick`; this method creates an object composed of the\n * own and inherited enumerable property paths of `object` that are not omitted.\n *\n * **Note:** This method is considerably slower than `_.pick`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The source object.\n * @param {...(string|string[])} [paths] The property paths to omit.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.omit(object, ['a', 'c']);\n * // => { 'b': '2' }\n */\n var omit = flatRest(function(object, paths) {\n var result = {};\n if (object == null) {\n return result;\n }\n var isDeep = false;\n paths = arrayMap(paths, function(path) {\n path = castPath(path, object);\n isDeep || (isDeep = path.length > 1);\n return path;\n });\n copyObject(object, getAllKeysIn(object), result);\n if (isDeep) {\n result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);\n }\n var length = paths.length;\n while (length--) {\n baseUnset(result, paths[length]);\n }\n return result;\n });\n\n /**\n * The opposite of `_.pickBy`; this method creates an object composed of\n * the own and inherited enumerable string keyed properties of `object` that\n * `predicate` doesn't return truthy for. The predicate is invoked with two\n * arguments: (value, key).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The source object.\n * @param {Function} [predicate=_.identity] The function invoked per property.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.omitBy(object, _.isNumber);\n * // => { 'b': '2' }\n */\n function omitBy(object, predicate) {\n return pickBy(object, negate(getIteratee(predicate)));\n }\n\n /**\n * Creates an object composed of the picked `object` properties.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The source object.\n * @param {...(string|string[])} [paths] The property paths to pick.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.pick(object, ['a', 'c']);\n * // => { 'a': 1, 'c': 3 }\n */\n var pick = flatRest(function(object, paths) {\n return object == null ? {} : basePick(object, paths);\n });\n\n /**\n * Creates an object composed of the `object` properties `predicate` returns\n * truthy for. The predicate is invoked with two arguments: (value, key).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The source object.\n * @param {Function} [predicate=_.identity] The function invoked per property.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.pickBy(object, _.isNumber);\n * // => { 'a': 1, 'c': 3 }\n */\n function pickBy(object, predicate) {\n if (object == null) {\n return {};\n }\n var props = arrayMap(getAllKeysIn(object), function(prop) {\n return [prop];\n });\n predicate = getIteratee(predicate);\n return basePickBy(object, props, function(value, path) {\n return predicate(value, path[0]);\n });\n }\n\n /**\n * This method is like `_.get` except that if the resolved value is a\n * function it's invoked with the `this` binding of its parent object and\n * its result is returned.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to resolve.\n * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n * @returns {*} Returns the resolved value.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };\n *\n * _.result(object, 'a[0].b.c1');\n * // => 3\n *\n * _.result(object, 'a[0].b.c2');\n * // => 4\n *\n * _.result(object, 'a[0].b.c3', 'default');\n * // => 'default'\n *\n * _.result(object, 'a[0].b.c3', _.constant('default'));\n * // => 'default'\n */\n function result(object, path, defaultValue) {\n path = castPath(path, object);\n\n var index = -1,\n length = path.length;\n\n // Ensure the loop is entered when path is empty.\n if (!length) {\n length = 1;\n object = undefined;\n }\n while (++index < length) {\n var value = object == null ? undefined : object[toKey(path[index])];\n if (value === undefined) {\n index = length;\n value = defaultValue;\n }\n object = isFunction(value) ? value.call(object) : value;\n }\n return object;\n }\n\n /**\n * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,\n * it's created. Arrays are created for missing index properties while objects\n * are created for all other missing properties. Use `_.setWith` to customize\n * `path` creation.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 3.7.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.set(object, 'a[0].b.c', 4);\n * console.log(object.a[0].b.c);\n * // => 4\n *\n * _.set(object, ['x', '0', 'y', 'z'], 5);\n * console.log(object.x[0].y.z);\n * // => 5\n */\n function set(object, path, value) {\n return object == null ? object : baseSet(object, path, value);\n }\n\n /**\n * This method is like `_.set` except that it accepts `customizer` which is\n * invoked to produce the objects of `path`. If `customizer` returns `undefined`\n * path creation is handled by the method instead. The `customizer` is invoked\n * with three arguments: (nsValue, key, nsObject).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {*} value The value to set.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {};\n *\n * _.setWith(object, '[0][1]', 'a', Object);\n * // => { '0': { '1': 'a' } }\n */\n function setWith(object, path, value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return object == null ? object : baseSet(object, path, value, customizer);\n }\n\n /**\n * Creates an array of own enumerable string keyed-value pairs for `object`\n * which can be consumed by `_.fromPairs`. If `object` is a map or set, its\n * entries are returned.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias entries\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the key-value pairs.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.toPairs(new Foo);\n * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)\n */\n var toPairs = createToPairs(keys);\n\n /**\n * Creates an array of own and inherited enumerable string keyed-value pairs\n * for `object` which can be consumed by `_.fromPairs`. If `object` is a map\n * or set, its entries are returned.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias entriesIn\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the key-value pairs.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.toPairsIn(new Foo);\n * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)\n */\n var toPairsIn = createToPairs(keysIn);\n\n /**\n * An alternative to `_.reduce`; this method transforms `object` to a new\n * `accumulator` object which is the result of running each of its own\n * enumerable string keyed properties thru `iteratee`, with each invocation\n * potentially mutating the `accumulator` object. If `accumulator` is not\n * provided, a new object with the same `[[Prototype]]` will be used. The\n * iteratee is invoked with four arguments: (accumulator, value, key, object).\n * Iteratee functions may exit iteration early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 1.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @param {*} [accumulator] The custom accumulator value.\n * @returns {*} Returns the accumulated value.\n * @example\n *\n * _.transform([2, 3, 4], function(result, n) {\n * result.push(n *= n);\n * return n % 2 == 0;\n * }, []);\n * // => [4, 9]\n *\n * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {\n * (result[value] || (result[value] = [])).push(key);\n * }, {});\n * // => { '1': ['a', 'c'], '2': ['b'] }\n */\n function transform(object, iteratee, accumulator) {\n var isArr = isArray(object),\n isArrLike = isArr || isBuffer(object) || isTypedArray(object);\n\n iteratee = getIteratee(iteratee, 4);\n if (accumulator == null) {\n var Ctor = object && object.constructor;\n if (isArrLike) {\n accumulator = isArr ? new Ctor : [];\n }\n else if (isObject(object)) {\n accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};\n }\n else {\n accumulator = {};\n }\n }\n (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {\n return iteratee(accumulator, value, index, object);\n });\n return accumulator;\n }\n\n /**\n * Removes the property at `path` of `object`.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to unset.\n * @returns {boolean} Returns `true` if the property is deleted, else `false`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 7 } }] };\n * _.unset(object, 'a[0].b.c');\n * // => true\n *\n * console.log(object);\n * // => { 'a': [{ 'b': {} }] };\n *\n * _.unset(object, ['a', '0', 'b', 'c']);\n * // => true\n *\n * console.log(object);\n * // => { 'a': [{ 'b': {} }] };\n */\n function unset(object, path) {\n return object == null ? true : baseUnset(object, path);\n }\n\n /**\n * This method is like `_.set` except that accepts `updater` to produce the\n * value to set. Use `_.updateWith` to customize `path` creation. The `updater`\n * is invoked with one argument: (value).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.6.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {Function} updater The function to produce the updated value.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.update(object, 'a[0].b.c', function(n) { return n * n; });\n * console.log(object.a[0].b.c);\n * // => 9\n *\n * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });\n * console.log(object.x[0].y.z);\n * // => 0\n */\n function update(object, path, updater) {\n return object == null ? object : baseUpdate(object, path, castFunction(updater));\n }\n\n /**\n * This method is like `_.update` except that it accepts `customizer` which is\n * invoked to produce the objects of `path`. If `customizer` returns `undefined`\n * path creation is handled by the method instead. The `customizer` is invoked\n * with three arguments: (nsValue, key, nsObject).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.6.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {Function} updater The function to produce the updated value.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {};\n *\n * _.updateWith(object, '[0][1]', _.constant('a'), Object);\n * // => { '0': { '1': 'a' } }\n */\n function updateWith(object, path, updater, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);\n }\n\n /**\n * Creates an array of the own enumerable string keyed property values of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property values.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.values(new Foo);\n * // => [1, 2] (iteration order is not guaranteed)\n *\n * _.values('hi');\n * // => ['h', 'i']\n */\n function values(object) {\n return object == null ? [] : baseValues(object, keys(object));\n }\n\n /**\n * Creates an array of the own and inherited enumerable string keyed property\n * values of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property values.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.valuesIn(new Foo);\n * // => [1, 2, 3] (iteration order is not guaranteed)\n */\n function valuesIn(object) {\n return object == null ? [] : baseValues(object, keysIn(object));\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Clamps `number` within the inclusive `lower` and `upper` bounds.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Number\n * @param {number} number The number to clamp.\n * @param {number} [lower] The lower bound.\n * @param {number} upper The upper bound.\n * @returns {number} Returns the clamped number.\n * @example\n *\n * _.clamp(-10, -5, 5);\n * // => -5\n *\n * _.clamp(10, -5, 5);\n * // => 5\n */\n function clamp(number, lower, upper) {\n if (upper === undefined) {\n upper = lower;\n lower = undefined;\n }\n if (upper !== undefined) {\n upper = toNumber(upper);\n upper = upper === upper ? upper : 0;\n }\n if (lower !== undefined) {\n lower = toNumber(lower);\n lower = lower === lower ? lower : 0;\n }\n return baseClamp(toNumber(number), lower, upper);\n }\n\n /**\n * Checks if `n` is between `start` and up to, but not including, `end`. If\n * `end` is not specified, it's set to `start` with `start` then set to `0`.\n * If `start` is greater than `end` the params are swapped to support\n * negative ranges.\n *\n * @static\n * @memberOf _\n * @since 3.3.0\n * @category Number\n * @param {number} number The number to check.\n * @param {number} [start=0] The start of the range.\n * @param {number} end The end of the range.\n * @returns {boolean} Returns `true` if `number` is in the range, else `false`.\n * @see _.range, _.rangeRight\n * @example\n *\n * _.inRange(3, 2, 4);\n * // => true\n *\n * _.inRange(4, 8);\n * // => true\n *\n * _.inRange(4, 2);\n * // => false\n *\n * _.inRange(2, 2);\n * // => false\n *\n * _.inRange(1.2, 2);\n * // => true\n *\n * _.inRange(5.2, 4);\n * // => false\n *\n * _.inRange(-3, -2, -6);\n * // => true\n */\n function inRange(number, start, end) {\n start = toFinite(start);\n if (end === undefined) {\n end = start;\n start = 0;\n } else {\n end = toFinite(end);\n }\n number = toNumber(number);\n return baseInRange(number, start, end);\n }\n\n /**\n * Produces a random number between the inclusive `lower` and `upper` bounds.\n * If only one argument is provided a number between `0` and the given number\n * is returned. If `floating` is `true`, or either `lower` or `upper` are\n * floats, a floating-point number is returned instead of an integer.\n *\n * **Note:** JavaScript follows the IEEE-754 standard for resolving\n * floating-point values which can produce unexpected results.\n *\n * @static\n * @memberOf _\n * @since 0.7.0\n * @category Number\n * @param {number} [lower=0] The lower bound.\n * @param {number} [upper=1] The upper bound.\n * @param {boolean} [floating] Specify returning a floating-point number.\n * @returns {number} Returns the random number.\n * @example\n *\n * _.random(0, 5);\n * // => an integer between 0 and 5\n *\n * _.random(5);\n * // => also an integer between 0 and 5\n *\n * _.random(5, true);\n * // => a floating-point number between 0 and 5\n *\n * _.random(1.2, 5.2);\n * // => a floating-point number between 1.2 and 5.2\n */\n function random(lower, upper, floating) {\n if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {\n upper = floating = undefined;\n }\n if (floating === undefined) {\n if (typeof upper == 'boolean') {\n floating = upper;\n upper = undefined;\n }\n else if (typeof lower == 'boolean') {\n floating = lower;\n lower = undefined;\n }\n }\n if (lower === undefined && upper === undefined) {\n lower = 0;\n upper = 1;\n }\n else {\n lower = toFinite(lower);\n if (upper === undefined) {\n upper = lower;\n lower = 0;\n } else {\n upper = toFinite(upper);\n }\n }\n if (lower > upper) {\n var temp = lower;\n lower = upper;\n upper = temp;\n }\n if (floating || lower % 1 || upper % 1) {\n var rand = nativeRandom();\n return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);\n }\n return baseRandom(lower, upper);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the camel cased string.\n * @example\n *\n * _.camelCase('Foo Bar');\n * // => 'fooBar'\n *\n * _.camelCase('--foo-bar--');\n * // => 'fooBar'\n *\n * _.camelCase('__FOO_BAR__');\n * // => 'fooBar'\n */\n var camelCase = createCompounder(function(result, word, index) {\n word = word.toLowerCase();\n return result + (index ? capitalize(word) : word);\n });\n\n /**\n * Converts the first character of `string` to upper case and the remaining\n * to lower case.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to capitalize.\n * @returns {string} Returns the capitalized string.\n * @example\n *\n * _.capitalize('FRED');\n * // => 'Fred'\n */\n function capitalize(string) {\n return upperFirst(toString(string).toLowerCase());\n }\n\n /**\n * Deburrs `string` by converting\n * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)\n * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)\n * letters to basic Latin letters and removing\n * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to deburr.\n * @returns {string} Returns the deburred string.\n * @example\n *\n * _.deburr('déjà vu');\n * // => 'deja vu'\n */\n function deburr(string) {\n string = toString(string);\n return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');\n }\n\n /**\n * Checks if `string` ends with the given target string.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to inspect.\n * @param {string} [target] The string to search for.\n * @param {number} [position=string.length] The position to search up to.\n * @returns {boolean} Returns `true` if `string` ends with `target`,\n * else `false`.\n * @example\n *\n * _.endsWith('abc', 'c');\n * // => true\n *\n * _.endsWith('abc', 'b');\n * // => false\n *\n * _.endsWith('abc', 'b', 2);\n * // => true\n */\n function endsWith(string, target, position) {\n string = toString(string);\n target = baseToString(target);\n\n var length = string.length;\n position = position === undefined\n ? length\n : baseClamp(toInteger(position), 0, length);\n\n var end = position;\n position -= target.length;\n return position >= 0 && string.slice(position, end) == target;\n }\n\n /**\n * Converts the characters \"&\", \"<\", \">\", '\"', and \"'\" in `string` to their\n * corresponding HTML entities.\n *\n * **Note:** No other characters are escaped. To escape additional\n * characters use a third-party library like [_he_](https://mths.be/he).\n *\n * Though the \">\" character is escaped for symmetry, characters like\n * \">\" and \"/\" don't need escaping in HTML and have no special meaning\n * unless they're part of a tag or unquoted attribute value. See\n * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)\n * (under \"semi-related fun fact\") for more details.\n *\n * When working with HTML you should always\n * [quote attribute values](http://wonko.com/post/html-escaping) to reduce\n * XSS vectors.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category String\n * @param {string} [string=''] The string to escape.\n * @returns {string} Returns the escaped string.\n * @example\n *\n * _.escape('fred, barney, & pebbles');\n * // => 'fred, barney, & pebbles'\n */\n function escape(string) {\n string = toString(string);\n return (string && reHasUnescapedHtml.test(string))\n ? string.replace(reUnescapedHtml, escapeHtmlChar)\n : string;\n }\n\n /**\n * Escapes the `RegExp` special characters \"^\", \"$\", \"\\\", \".\", \"*\", \"+\",\n * \"?\", \"(\", \")\", \"[\", \"]\", \"{\", \"}\", and \"|\" in `string`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to escape.\n * @returns {string} Returns the escaped string.\n * @example\n *\n * _.escapeRegExp('[lodash](https://lodash.com/)');\n * // => '\\[lodash\\]\\(https://lodash\\.com/\\)'\n */\n function escapeRegExp(string) {\n string = toString(string);\n return (string && reHasRegExpChar.test(string))\n ? string.replace(reRegExpChar, '\\\\$&')\n : string;\n }\n\n /**\n * Converts `string` to\n * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the kebab cased string.\n * @example\n *\n * _.kebabCase('Foo Bar');\n * // => 'foo-bar'\n *\n * _.kebabCase('fooBar');\n * // => 'foo-bar'\n *\n * _.kebabCase('__FOO_BAR__');\n * // => 'foo-bar'\n */\n var kebabCase = createCompounder(function(result, word, index) {\n return result + (index ? '-' : '') + word.toLowerCase();\n });\n\n /**\n * Converts `string`, as space separated words, to lower case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the lower cased string.\n * @example\n *\n * _.lowerCase('--Foo-Bar--');\n * // => 'foo bar'\n *\n * _.lowerCase('fooBar');\n * // => 'foo bar'\n *\n * _.lowerCase('__FOO_BAR__');\n * // => 'foo bar'\n */\n var lowerCase = createCompounder(function(result, word, index) {\n return result + (index ? ' ' : '') + word.toLowerCase();\n });\n\n /**\n * Converts the first character of `string` to lower case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.lowerFirst('Fred');\n * // => 'fred'\n *\n * _.lowerFirst('FRED');\n * // => 'fRED'\n */\n var lowerFirst = createCaseFirst('toLowerCase');\n\n /**\n * Pads `string` on the left and right sides if it's shorter than `length`.\n * Padding characters are truncated if they can't be evenly divided by `length`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.pad('abc', 8);\n * // => ' abc '\n *\n * _.pad('abc', 8, '_-');\n * // => '_-abc_-_'\n *\n * _.pad('abc', 3);\n * // => 'abc'\n */\n function pad(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n if (!length || strLength >= length) {\n return string;\n }\n var mid = (length - strLength) / 2;\n return (\n createPadding(nativeFloor(mid), chars) +\n string +\n createPadding(nativeCeil(mid), chars)\n );\n }\n\n /**\n * Pads `string` on the right side if it's shorter than `length`. Padding\n * characters are truncated if they exceed `length`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.padEnd('abc', 6);\n * // => 'abc '\n *\n * _.padEnd('abc', 6, '_-');\n * // => 'abc_-_'\n *\n * _.padEnd('abc', 3);\n * // => 'abc'\n */\n function padEnd(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n return (length && strLength < length)\n ? (string + createPadding(length - strLength, chars))\n : string;\n }\n\n /**\n * Pads `string` on the left side if it's shorter than `length`. Padding\n * characters are truncated if they exceed `length`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.padStart('abc', 6);\n * // => ' abc'\n *\n * _.padStart('abc', 6, '_-');\n * // => '_-_abc'\n *\n * _.padStart('abc', 3);\n * // => 'abc'\n */\n function padStart(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n return (length && strLength < length)\n ? (createPadding(length - strLength, chars) + string)\n : string;\n }\n\n /**\n * Converts `string` to an integer of the specified radix. If `radix` is\n * `undefined` or `0`, a `radix` of `10` is used unless `value` is a\n * hexadecimal, in which case a `radix` of `16` is used.\n *\n * **Note:** This method aligns with the\n * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category String\n * @param {string} string The string to convert.\n * @param {number} [radix=10] The radix to interpret `value` by.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.parseInt('08');\n * // => 8\n *\n * _.map(['6', '08', '10'], _.parseInt);\n * // => [6, 8, 10]\n */\n function parseInt(string, radix, guard) {\n if (guard || radix == null) {\n radix = 0;\n } else if (radix) {\n radix = +radix;\n }\n return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);\n }\n\n /**\n * Repeats the given string `n` times.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to repeat.\n * @param {number} [n=1] The number of times to repeat the string.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {string} Returns the repeated string.\n * @example\n *\n * _.repeat('*', 3);\n * // => '***'\n *\n * _.repeat('abc', 2);\n * // => 'abcabc'\n *\n * _.repeat('abc', 0);\n * // => ''\n */\n function repeat(string, n, guard) {\n if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {\n n = 1;\n } else {\n n = toInteger(n);\n }\n return baseRepeat(toString(string), n);\n }\n\n /**\n * Replaces matches for `pattern` in `string` with `replacement`.\n *\n * **Note:** This method is based on\n * [`String#replace`](https://mdn.io/String/replace).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to modify.\n * @param {RegExp|string} pattern The pattern to replace.\n * @param {Function|string} replacement The match replacement.\n * @returns {string} Returns the modified string.\n * @example\n *\n * _.replace('Hi Fred', 'Fred', 'Barney');\n * // => 'Hi Barney'\n */\n function replace() {\n var args = arguments,\n string = toString(args[0]);\n\n return args.length < 3 ? string : string.replace(args[1], args[2]);\n }\n\n /**\n * Converts `string` to\n * [snake case](https://en.wikipedia.org/wiki/Snake_case).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the snake cased string.\n * @example\n *\n * _.snakeCase('Foo Bar');\n * // => 'foo_bar'\n *\n * _.snakeCase('fooBar');\n * // => 'foo_bar'\n *\n * _.snakeCase('--FOO-BAR--');\n * // => 'foo_bar'\n */\n var snakeCase = createCompounder(function(result, word, index) {\n return result + (index ? '_' : '') + word.toLowerCase();\n });\n\n /**\n * Splits `string` by `separator`.\n *\n * **Note:** This method is based on\n * [`String#split`](https://mdn.io/String/split).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to split.\n * @param {RegExp|string} separator The separator pattern to split by.\n * @param {number} [limit] The length to truncate results to.\n * @returns {Array} Returns the string segments.\n * @example\n *\n * _.split('a-b-c', '-', 2);\n * // => ['a', 'b']\n */\n function split(string, separator, limit) {\n if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {\n separator = limit = undefined;\n }\n limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;\n if (!limit) {\n return [];\n }\n string = toString(string);\n if (string && (\n typeof separator == 'string' ||\n (separator != null && !isRegExp(separator))\n )) {\n separator = baseToString(separator);\n if (!separator && hasUnicode(string)) {\n return castSlice(stringToArray(string), 0, limit);\n }\n }\n return string.split(separator, limit);\n }\n\n /**\n * Converts `string` to\n * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).\n *\n * @static\n * @memberOf _\n * @since 3.1.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the start cased string.\n * @example\n *\n * _.startCase('--foo-bar--');\n * // => 'Foo Bar'\n *\n * _.startCase('fooBar');\n * // => 'Foo Bar'\n *\n * _.startCase('__FOO_BAR__');\n * // => 'FOO BAR'\n */\n var startCase = createCompounder(function(result, word, index) {\n return result + (index ? ' ' : '') + upperFirst(word);\n });\n\n /**\n * Checks if `string` starts with the given target string.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to inspect.\n * @param {string} [target] The string to search for.\n * @param {number} [position=0] The position to search from.\n * @returns {boolean} Returns `true` if `string` starts with `target`,\n * else `false`.\n * @example\n *\n * _.startsWith('abc', 'a');\n * // => true\n *\n * _.startsWith('abc', 'b');\n * // => false\n *\n * _.startsWith('abc', 'b', 1);\n * // => true\n */\n function startsWith(string, target, position) {\n string = toString(string);\n position = position == null\n ? 0\n : baseClamp(toInteger(position), 0, string.length);\n\n target = baseToString(target);\n return string.slice(position, position + target.length) == target;\n }\n\n /**\n * Creates a compiled template function that can interpolate data properties\n * in \"interpolate\" delimiters, HTML-escape interpolated data properties in\n * \"escape\" delimiters, and execute JavaScript in \"evaluate\" delimiters. Data\n * properties may be accessed as free variables in the template. If a setting\n * object is given, it takes precedence over `_.templateSettings` values.\n *\n * **Note:** In the development build `_.template` utilizes\n * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)\n * for easier debugging.\n *\n * For more information on precompiling templates see\n * [lodash's custom builds documentation](https://lodash.com/custom-builds).\n *\n * For more information on Chrome extension sandboxes see\n * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category String\n * @param {string} [string=''] The template string.\n * @param {Object} [options={}] The options object.\n * @param {RegExp} [options.escape=_.templateSettings.escape]\n * The HTML \"escape\" delimiter.\n * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]\n * The \"evaluate\" delimiter.\n * @param {Object} [options.imports=_.templateSettings.imports]\n * An object to import into the template as free variables.\n * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]\n * The \"interpolate\" delimiter.\n * @param {string} [options.sourceURL='lodash.templateSources[n]']\n * The sourceURL of the compiled template.\n * @param {string} [options.variable='obj']\n * The data object variable name.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Function} Returns the compiled template function.\n * @example\n *\n * // Use the \"interpolate\" delimiter to create a compiled template.\n * var compiled = _.template('hello <%= user %>!');\n * compiled({ 'user': 'fred' });\n * // => 'hello fred!'\n *\n * // Use the HTML \"escape\" delimiter to escape data property values.\n * var compiled = _.template('<%- value %>');\n * compiled({ 'value': '