mirror of
https://github.com/mozilla/pdf.js.git
synced 2026-04-18 11:14:02 +02:00
e4d0e84802
This replaces our custom `PromiseCapability`-class with the new native `Promise.withResolvers()` functionality, which does *almost* the same thing[1]; please see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/withResolvers The only difference is that `PromiseCapability` also had a `settled`-getter, which was however not widely used and the call-sites can either be removed or re-factored to avoid it. In particular: - In `src/display/api.js` we can tweak the `PDFObjects`-class to use a "special" initial data-value and just compare against that, in order to replace the `settled`-state. - In `web/app.js` we change the only case to manually track the `settled`-state, which should hopefully be OK given how this is being used. - In `web/pdf_outline_viewer.js` we can remove the `settled`-checks, since the code should work just fine without it. The only thing that could potentially happen is that we try to `resolve` a Promise multiple times, which is however *not* a problem since the value of a Promise cannot be changed once fulfilled or rejected. - In `web/pdf_viewer.js` we can remove the `settled`-checks, since the code should work fine without them: - For the `_onePageRenderedCapability` case the `settled`-check is used in a `EventBus`-listener which is *removed* on its first (valid) invocation. - For the `_pagesCapability` case the `settled`-check is used in a print-related helper that works just fine with "only" the other checks. - In `test/unit/api_spec.js` we can change the few relevant cases to manually track the `settled`-state, since this is both simple and *test-only* code. --- [1] In browsers/environments that lack native support, note [the compatibility data](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/withResolvers#browser_compatibility), it'll be polyfilled via the `core-js` library (but only in `legacy` builds).
2288 lines
68 KiB
JavaScript
2288 lines
68 KiB
JavaScript
/* Copyright 2014 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/** @typedef {import("../src/display/api").PDFDocumentProxy} PDFDocumentProxy */
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/** @typedef {import("../src/display/api").PDFPageProxy} PDFPageProxy */
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// eslint-disable-next-line max-len
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/** @typedef {import("../src/display/display_utils").PageViewport} PageViewport */
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// eslint-disable-next-line max-len
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/** @typedef {import("../src/display/optional_content_config").OptionalContentConfig} OptionalContentConfig */
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/** @typedef {import("./event_utils").EventBus} EventBus */
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/** @typedef {import("./interfaces").IDownloadManager} IDownloadManager */
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/** @typedef {import("./interfaces").IL10n} IL10n */
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/** @typedef {import("./interfaces").IPDFLinkService} IPDFLinkService */
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// eslint-disable-next-line max-len
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/** @typedef {import("./pdf_find_controller").PDFFindController} PDFFindController */
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// eslint-disable-next-line max-len
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/** @typedef {import("./pdf_scripting_manager").PDFScriptingManager} PDFScriptingManager */
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import {
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AnnotationEditorType,
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AnnotationEditorUIManager,
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AnnotationMode,
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PermissionFlag,
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PixelsPerInch,
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shadow,
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version,
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} from "pdfjs-lib";
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import {
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DEFAULT_SCALE,
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DEFAULT_SCALE_DELTA,
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DEFAULT_SCALE_VALUE,
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docStyle,
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getVisibleElements,
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isPortraitOrientation,
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isValidRotation,
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isValidScrollMode,
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isValidSpreadMode,
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MAX_AUTO_SCALE,
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MAX_SCALE,
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MIN_SCALE,
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PresentationModeState,
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removeNullCharacters,
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RenderingStates,
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SCROLLBAR_PADDING,
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scrollIntoView,
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ScrollMode,
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SpreadMode,
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TextLayerMode,
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UNKNOWN_SCALE,
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VERTICAL_PADDING,
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watchScroll,
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} from "./ui_utils.js";
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import { GenericL10n } from "web-null_l10n";
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import { PDFPageView } from "./pdf_page_view.js";
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import { PDFRenderingQueue } from "./pdf_rendering_queue.js";
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import { SimpleLinkService } from "./pdf_link_service.js";
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const DEFAULT_CACHE_SIZE = 10;
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const PagesCountLimit = {
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FORCE_SCROLL_MODE_PAGE: 15000,
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FORCE_LAZY_PAGE_INIT: 7500,
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PAUSE_EAGER_PAGE_INIT: 250,
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};
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function isValidAnnotationEditorMode(mode) {
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return (
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Object.values(AnnotationEditorType).includes(mode) &&
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mode !== AnnotationEditorType.DISABLE
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);
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}
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/**
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* @typedef {Object} PDFViewerOptions
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* @property {HTMLDivElement} container - The container for the viewer element.
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* @property {HTMLDivElement} [viewer] - The viewer element.
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* @property {EventBus} eventBus - The application event bus.
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* @property {IPDFLinkService} [linkService] - The navigation/linking service.
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* @property {IDownloadManager} [downloadManager] - The download manager
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* component.
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* @property {PDFFindController} [findController] - The find controller
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* component.
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* @property {PDFScriptingManager} [scriptingManager] - The scripting manager
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* component.
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* @property {PDFRenderingQueue} [renderingQueue] - The rendering queue object.
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* @property {boolean} [removePageBorders] - Removes the border shadow around
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* the pages. The default value is `false`.
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* @property {number} [textLayerMode] - Controls if the text layer used for
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* selection and searching is created. The constants from {TextLayerMode}
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* should be used. The default value is `TextLayerMode.ENABLE`.
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* @property {number} [annotationMode] - Controls if the annotation layer is
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* created, and if interactive form elements or `AnnotationStorage`-data are
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* being rendered. The constants from {@link AnnotationMode} should be used;
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* see also {@link RenderParameters} and {@link GetOperatorListParameters}.
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* The default value is `AnnotationMode.ENABLE_FORMS`.
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* @property {number} [annotationEditorMode] - Enables the creation and editing
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* of new Annotations. The constants from {@link AnnotationEditorType} should
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* be used. The default value is `AnnotationEditorType.NONE`.
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* @property {string} [annotationEditorHighlightColors] - A comma separated list
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* of colors to propose to highlight some text in the pdf.
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* @property {string} [imageResourcesPath] - Path for image resources, mainly
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* mainly for annotation icons. Include trailing slash.
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* @property {boolean} [enablePrintAutoRotate] - Enables automatic rotation of
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* landscape pages upon printing. The default is `false`.
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* @property {number} [maxCanvasPixels] - The maximum supported canvas size in
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* total pixels, i.e. width * height. Use `-1` for no limit, or `0` for
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* CSS-only zooming. The default value is 4096 * 8192 (32 mega-pixels).
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* @property {IL10n} [l10n] - Localization service.
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* @property {boolean} [enablePermissions] - Enables PDF document permissions,
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* when they exist. The default value is `false`.
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* @property {Object} [pageColors] - Overwrites background and foreground colors
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* with user defined ones in order to improve readability in high contrast
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* mode.
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*/
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class PDFPageViewBuffer {
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// Here we rely on the fact that `Set`s preserve the insertion order.
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#buf = new Set();
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#size = 0;
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constructor(size) {
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this.#size = size;
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}
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push(view) {
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const buf = this.#buf;
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if (buf.has(view)) {
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buf.delete(view); // Move the view to the "end" of the buffer.
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}
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buf.add(view);
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if (buf.size > this.#size) {
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this.#destroyFirstView();
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}
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}
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/**
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* After calling resize, the size of the buffer will be `newSize`.
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* The optional parameter `idsToKeep` is, if present, a Set of page-ids to
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* push to the back of the buffer, delaying their destruction. The size of
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* `idsToKeep` has no impact on the final size of the buffer; if `idsToKeep`
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* is larger than `newSize`, some of those pages will be destroyed anyway.
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*/
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resize(newSize, idsToKeep = null) {
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this.#size = newSize;
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const buf = this.#buf;
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if (idsToKeep) {
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const ii = buf.size;
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let i = 1;
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for (const view of buf) {
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if (idsToKeep.has(view.id)) {
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buf.delete(view); // Move the view to the "end" of the buffer.
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buf.add(view);
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}
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if (++i > ii) {
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break;
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}
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}
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}
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while (buf.size > this.#size) {
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this.#destroyFirstView();
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}
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}
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has(view) {
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return this.#buf.has(view);
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}
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[Symbol.iterator]() {
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return this.#buf.keys();
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}
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#destroyFirstView() {
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const firstView = this.#buf.keys().next().value;
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firstView?.destroy();
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this.#buf.delete(firstView);
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}
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}
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/**
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* Simple viewer control to display PDF content/pages.
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*/
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class PDFViewer {
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#buffer = null;
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#altTextManager = null;
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#annotationEditorHighlightColors = null;
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#annotationEditorMode = AnnotationEditorType.NONE;
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#annotationEditorUIManager = null;
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#annotationMode = AnnotationMode.ENABLE_FORMS;
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#containerTopLeft = null;
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#copyCallbackBound = null;
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#enableHighlightFloatingButton = false;
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#enablePermissions = false;
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#mlManager = null;
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#getAllTextInProgress = false;
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#hiddenCopyElement = null;
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#interruptCopyCondition = false;
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#previousContainerHeight = 0;
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#resizeObserver = new ResizeObserver(this.#resizeObserverCallback.bind(this));
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#scrollModePageState = null;
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#onVisibilityChange = null;
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#scaleTimeoutId = null;
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#textLayerMode = TextLayerMode.ENABLE;
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/**
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* @param {PDFViewerOptions} options
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*/
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constructor(options) {
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const viewerVersion =
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typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_VERSION") : null;
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if (version !== viewerVersion) {
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throw new Error(
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`The API version "${version}" does not match the Viewer version "${viewerVersion}".`
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);
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}
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this.container = options.container;
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this.viewer = options.viewer || options.container.firstElementChild;
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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if (this.container?.tagName !== "DIV" || this.viewer?.tagName !== "DIV") {
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throw new Error("Invalid `container` and/or `viewer` option.");
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}
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if (
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this.container.offsetParent &&
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getComputedStyle(this.container).position !== "absolute"
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) {
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throw new Error("The `container` must be absolutely positioned.");
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}
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}
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this.#resizeObserver.observe(this.container);
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this.eventBus = options.eventBus;
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this.linkService = options.linkService || new SimpleLinkService();
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this.downloadManager = options.downloadManager || null;
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this.findController = options.findController || null;
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this.#altTextManager = options.altTextManager || null;
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if (this.findController) {
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this.findController.onIsPageVisible = pageNumber =>
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this._getVisiblePages().ids.has(pageNumber);
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}
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this._scriptingManager = options.scriptingManager || null;
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this.#textLayerMode = options.textLayerMode ?? TextLayerMode.ENABLE;
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this.#annotationMode =
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options.annotationMode ?? AnnotationMode.ENABLE_FORMS;
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this.#annotationEditorMode =
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options.annotationEditorMode ?? AnnotationEditorType.NONE;
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this.#annotationEditorHighlightColors =
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options.annotationEditorHighlightColors || null;
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this.#enableHighlightFloatingButton =
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options.enableHighlightFloatingButton === true;
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this.imageResourcesPath = options.imageResourcesPath || "";
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this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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this.removePageBorders = options.removePageBorders || false;
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}
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this.maxCanvasPixels = options.maxCanvasPixels;
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this.l10n = options.l10n;
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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this.l10n ||= new GenericL10n();
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}
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this.#enablePermissions = options.enablePermissions || false;
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this.pageColors = options.pageColors || null;
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this.#mlManager = options.mlManager || null;
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this.defaultRenderingQueue = !options.renderingQueue;
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if (
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(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
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this.defaultRenderingQueue
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) {
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// Custom rendering queue is not specified, using default one
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this.renderingQueue = new PDFRenderingQueue();
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this.renderingQueue.setViewer(this);
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} else {
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this.renderingQueue = options.renderingQueue;
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}
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this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));
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this.presentationModeState = PresentationModeState.UNKNOWN;
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this._onBeforeDraw = this._onAfterDraw = null;
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this._resetView();
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if (
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(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
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this.removePageBorders
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) {
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this.viewer.classList.add("removePageBorders");
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}
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this.#updateContainerHeightCss();
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// Trigger API-cleanup, once thumbnail rendering has finished,
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// if the relevant pageView is *not* cached in the buffer.
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this.eventBus._on("thumbnailrendered", ({ pageNumber, pdfPage }) => {
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const pageView = this._pages[pageNumber - 1];
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if (!this.#buffer.has(pageView)) {
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pdfPage?.cleanup();
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}
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});
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if (
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(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
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!options.l10n
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) {
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// Ensure that Fluent is connected in e.g. the COMPONENTS build.
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this.l10n.translate(this.container);
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}
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}
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get pagesCount() {
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return this._pages.length;
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}
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getPageView(index) {
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return this._pages[index];
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}
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getCachedPageViews() {
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return new Set(this.#buffer);
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}
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/**
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* @type {boolean} - True if all {PDFPageView} objects are initialized.
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*/
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get pageViewsReady() {
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// Prevent printing errors when 'disableAutoFetch' is set, by ensuring
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// that *all* pages have in fact been completely loaded.
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return this._pages.every(pageView => pageView?.pdfPage);
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}
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/**
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||
* @type {boolean}
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*/
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get renderForms() {
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return this.#annotationMode === AnnotationMode.ENABLE_FORMS;
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||
}
|
||
|
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/**
|
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* @type {boolean}
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*/
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get enableScripting() {
|
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return !!this._scriptingManager;
|
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}
|
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/**
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* @type {number}
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*/
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get currentPageNumber() {
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return this._currentPageNumber;
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}
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|
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/**
|
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* @param {number} val - The page number.
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*/
|
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set currentPageNumber(val) {
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if (!Number.isInteger(val)) {
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throw new Error("Invalid page number.");
|
||
}
|
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if (!this.pdfDocument) {
|
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return;
|
||
}
|
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// The intent can be to just reset a scroll position and/or scale.
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if (!this._setCurrentPageNumber(val, /* resetCurrentPageView = */ true)) {
|
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console.error(`currentPageNumber: "${val}" is not a valid page.`);
|
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}
|
||
}
|
||
|
||
/**
|
||
* @returns {boolean} Whether the pageNumber is valid (within bounds).
|
||
* @private
|
||
*/
|
||
_setCurrentPageNumber(val, resetCurrentPageView = false) {
|
||
if (this._currentPageNumber === val) {
|
||
if (resetCurrentPageView) {
|
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this.#resetCurrentPageView();
|
||
}
|
||
return true;
|
||
}
|
||
|
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if (!(0 < val && val <= this.pagesCount)) {
|
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return false;
|
||
}
|
||
const previous = this._currentPageNumber;
|
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this._currentPageNumber = val;
|
||
|
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this.eventBus.dispatch("pagechanging", {
|
||
source: this,
|
||
pageNumber: val,
|
||
pageLabel: this._pageLabels?.[val - 1] ?? null,
|
||
previous,
|
||
});
|
||
|
||
if (resetCurrentPageView) {
|
||
this.#resetCurrentPageView();
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* @type {string|null} Returns the current page label, or `null` if no page
|
||
* labels exist.
|
||
*/
|
||
get currentPageLabel() {
|
||
return this._pageLabels?.[this._currentPageNumber - 1] ?? null;
|
||
}
|
||
|
||
/**
|
||
* @param {string} val - The page label.
|
||
*/
|
||
set currentPageLabel(val) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
let page = val | 0; // Fallback page number.
|
||
if (this._pageLabels) {
|
||
const i = this._pageLabels.indexOf(val);
|
||
if (i >= 0) {
|
||
page = i + 1;
|
||
}
|
||
}
|
||
// The intent can be to just reset a scroll position and/or scale.
|
||
if (!this._setCurrentPageNumber(page, /* resetCurrentPageView = */ true)) {
|
||
console.error(`currentPageLabel: "${val}" is not a valid page.`);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @type {number}
|
||
*/
|
||
get currentScale() {
|
||
return this._currentScale !== UNKNOWN_SCALE
|
||
? this._currentScale
|
||
: DEFAULT_SCALE;
|
||
}
|
||
|
||
/**
|
||
* @param {number} val - Scale of the pages in percents.
|
||
*/
|
||
set currentScale(val) {
|
||
if (isNaN(val)) {
|
||
throw new Error("Invalid numeric scale.");
|
||
}
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
this.#setScale(val, { noScroll: false });
|
||
}
|
||
|
||
/**
|
||
* @type {string}
|
||
*/
|
||
get currentScaleValue() {
|
||
return this._currentScaleValue;
|
||
}
|
||
|
||
/**
|
||
* @param val - The scale of the pages (in percent or predefined value).
|
||
*/
|
||
set currentScaleValue(val) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
this.#setScale(val, { noScroll: false });
|
||
}
|
||
|
||
/**
|
||
* @type {number}
|
||
*/
|
||
get pagesRotation() {
|
||
return this._pagesRotation;
|
||
}
|
||
|
||
/**
|
||
* @param {number} rotation - The rotation of the pages (0, 90, 180, 270).
|
||
*/
|
||
set pagesRotation(rotation) {
|
||
if (!isValidRotation(rotation)) {
|
||
throw new Error("Invalid pages rotation angle.");
|
||
}
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
// Normalize the rotation, by clamping it to the [0, 360) range.
|
||
rotation %= 360;
|
||
if (rotation < 0) {
|
||
rotation += 360;
|
||
}
|
||
if (this._pagesRotation === rotation) {
|
||
return; // The rotation didn't change.
|
||
}
|
||
this._pagesRotation = rotation;
|
||
|
||
const pageNumber = this._currentPageNumber;
|
||
|
||
this.refresh(true, { rotation });
|
||
|
||
// Prevent errors in case the rotation changes *before* the scale has been
|
||
// set to a non-default value.
|
||
if (this._currentScaleValue) {
|
||
this.#setScale(this._currentScaleValue, { noScroll: true });
|
||
}
|
||
|
||
this.eventBus.dispatch("rotationchanging", {
|
||
source: this,
|
||
pagesRotation: rotation,
|
||
pageNumber,
|
||
});
|
||
|
||
if (this.defaultRenderingQueue) {
|
||
this.update();
|
||
}
|
||
}
|
||
|
||
get firstPagePromise() {
|
||
return this.pdfDocument ? this._firstPageCapability.promise : null;
|
||
}
|
||
|
||
get onePageRendered() {
|
||
return this.pdfDocument ? this._onePageRenderedCapability.promise : null;
|
||
}
|
||
|
||
get pagesPromise() {
|
||
return this.pdfDocument ? this._pagesCapability.promise : null;
|
||
}
|
||
|
||
get _layerProperties() {
|
||
const self = this;
|
||
return shadow(this, "_layerProperties", {
|
||
get annotationEditorUIManager() {
|
||
return self.#annotationEditorUIManager;
|
||
},
|
||
get annotationStorage() {
|
||
return self.pdfDocument?.annotationStorage;
|
||
},
|
||
get downloadManager() {
|
||
return self.downloadManager;
|
||
},
|
||
get enableScripting() {
|
||
return !!self._scriptingManager;
|
||
},
|
||
get fieldObjectsPromise() {
|
||
return self.pdfDocument?.getFieldObjects();
|
||
},
|
||
get findController() {
|
||
return self.findController;
|
||
},
|
||
get hasJSActionsPromise() {
|
||
return self.pdfDocument?.hasJSActions();
|
||
},
|
||
get linkService() {
|
||
return self.linkService;
|
||
},
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Currently only *some* permissions are supported.
|
||
* @returns {Object}
|
||
*/
|
||
#initializePermissions(permissions) {
|
||
const params = {
|
||
annotationEditorMode: this.#annotationEditorMode,
|
||
annotationMode: this.#annotationMode,
|
||
textLayerMode: this.#textLayerMode,
|
||
};
|
||
if (!permissions) {
|
||
return params;
|
||
}
|
||
|
||
if (
|
||
!permissions.includes(PermissionFlag.COPY) &&
|
||
this.#textLayerMode === TextLayerMode.ENABLE
|
||
) {
|
||
params.textLayerMode = TextLayerMode.ENABLE_PERMISSIONS;
|
||
}
|
||
|
||
if (!permissions.includes(PermissionFlag.MODIFY_CONTENTS)) {
|
||
params.annotationEditorMode = AnnotationEditorType.DISABLE;
|
||
}
|
||
|
||
if (
|
||
!permissions.includes(PermissionFlag.MODIFY_ANNOTATIONS) &&
|
||
!permissions.includes(PermissionFlag.FILL_INTERACTIVE_FORMS) &&
|
||
this.#annotationMode === AnnotationMode.ENABLE_FORMS
|
||
) {
|
||
params.annotationMode = AnnotationMode.ENABLE;
|
||
}
|
||
|
||
return params;
|
||
}
|
||
|
||
async #onePageRenderedOrForceFetch() {
|
||
// Unless the viewer *and* its pages are visible, rendering won't start and
|
||
// `this._onePageRenderedCapability` thus won't be resolved.
|
||
// To ensure that automatic printing, on document load, still works even in
|
||
// those cases we force-allow fetching of all pages when:
|
||
// - The current window/tab is inactive, which will prevent rendering since
|
||
// `requestAnimationFrame` is being used; fixes bug 1746213.
|
||
// - The viewer is hidden in the DOM, e.g. in a `display: none` <iframe>
|
||
// element; fixes bug 1618621.
|
||
// - The viewer is visible, but none of the pages are (e.g. if the
|
||
// viewer is very small); fixes bug 1618955.
|
||
if (
|
||
document.visibilityState === "hidden" ||
|
||
!this.container.offsetParent ||
|
||
this._getVisiblePages().views.length === 0
|
||
) {
|
||
return;
|
||
}
|
||
|
||
// Handle the window/tab becoming inactive *after* rendering has started;
|
||
// fixes (another part of) bug 1746213.
|
||
const visibilityChangePromise = new Promise(resolve => {
|
||
this.#onVisibilityChange = () => {
|
||
if (document.visibilityState !== "hidden") {
|
||
return;
|
||
}
|
||
resolve();
|
||
};
|
||
document.addEventListener("visibilitychange", this.#onVisibilityChange);
|
||
});
|
||
|
||
await Promise.race([
|
||
this._onePageRenderedCapability.promise,
|
||
visibilityChangePromise,
|
||
]);
|
||
// Ensure that the "visibilitychange" listener is always removed.
|
||
document.removeEventListener("visibilitychange", this.#onVisibilityChange);
|
||
this.#onVisibilityChange = null;
|
||
}
|
||
|
||
async getAllText() {
|
||
const texts = [];
|
||
const buffer = [];
|
||
for (
|
||
let pageNum = 1, pagesCount = this.pdfDocument.numPages;
|
||
pageNum <= pagesCount;
|
||
++pageNum
|
||
) {
|
||
if (this.#interruptCopyCondition) {
|
||
return null;
|
||
}
|
||
buffer.length = 0;
|
||
const page = await this.pdfDocument.getPage(pageNum);
|
||
// By default getTextContent pass disableNormalization equals to false
|
||
// which is fine because we want a normalized string.
|
||
const { items } = await page.getTextContent();
|
||
for (const item of items) {
|
||
if (item.str) {
|
||
buffer.push(item.str);
|
||
}
|
||
if (item.hasEOL) {
|
||
buffer.push("\n");
|
||
}
|
||
}
|
||
texts.push(removeNullCharacters(buffer.join("")));
|
||
}
|
||
|
||
return texts.join("\n");
|
||
}
|
||
|
||
#copyCallback(textLayerMode, event) {
|
||
const selection = document.getSelection();
|
||
const { focusNode, anchorNode } = selection;
|
||
if (
|
||
anchorNode &&
|
||
focusNode &&
|
||
selection.containsNode(this.#hiddenCopyElement)
|
||
) {
|
||
// About the condition above:
|
||
// - having non-null anchorNode and focusNode are here to guaranty that
|
||
// we have at least a kind of selection.
|
||
// - this.#hiddenCopyElement is an invisible element which is impossible
|
||
// to select manually (its display is none) but ctrl+A will select all
|
||
// including this element so having it in the selection means that all
|
||
// has been selected.
|
||
|
||
if (
|
||
this.#getAllTextInProgress ||
|
||
textLayerMode === TextLayerMode.ENABLE_PERMISSIONS
|
||
) {
|
||
event.preventDefault();
|
||
event.stopPropagation();
|
||
return;
|
||
}
|
||
this.#getAllTextInProgress = true;
|
||
|
||
// TODO: if all the pages are rendered we don't need to wait for
|
||
// getAllText and we could just get text from the Selection object.
|
||
|
||
// Select all the document.
|
||
const savedCursor = this.container.style.cursor;
|
||
this.container.style.cursor = "wait";
|
||
|
||
const interruptCopy = ev =>
|
||
(this.#interruptCopyCondition = ev.key === "Escape");
|
||
window.addEventListener("keydown", interruptCopy);
|
||
|
||
this.getAllText()
|
||
.then(async text => {
|
||
if (text !== null) {
|
||
await navigator.clipboard.writeText(text);
|
||
}
|
||
})
|
||
.catch(reason => {
|
||
console.warn(
|
||
`Something goes wrong when extracting the text: ${reason.message}`
|
||
);
|
||
})
|
||
.finally(() => {
|
||
this.#getAllTextInProgress = false;
|
||
this.#interruptCopyCondition = false;
|
||
window.removeEventListener("keydown", interruptCopy);
|
||
this.container.style.cursor = savedCursor;
|
||
});
|
||
|
||
event.preventDefault();
|
||
event.stopPropagation();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param {PDFDocumentProxy} pdfDocument
|
||
*/
|
||
setDocument(pdfDocument) {
|
||
if (this.pdfDocument) {
|
||
this.eventBus.dispatch("pagesdestroy", { source: this });
|
||
|
||
this._cancelRendering();
|
||
this._resetView();
|
||
|
||
this.findController?.setDocument(null);
|
||
this._scriptingManager?.setDocument(null);
|
||
|
||
if (this.#annotationEditorUIManager) {
|
||
this.#annotationEditorUIManager.destroy();
|
||
this.#annotationEditorUIManager = null;
|
||
}
|
||
}
|
||
|
||
this.pdfDocument = pdfDocument;
|
||
if (!pdfDocument) {
|
||
return;
|
||
}
|
||
const pagesCount = pdfDocument.numPages;
|
||
const firstPagePromise = pdfDocument.getPage(1);
|
||
// Rendering (potentially) depends on this, hence fetching it immediately.
|
||
const optionalContentConfigPromise = pdfDocument.getOptionalContentConfig({
|
||
intent: "display",
|
||
});
|
||
const permissionsPromise = this.#enablePermissions
|
||
? pdfDocument.getPermissions()
|
||
: Promise.resolve();
|
||
|
||
// Given that browsers don't handle huge amounts of DOM-elements very well,
|
||
// enforce usage of PAGE-scrolling when loading *very* long/large documents.
|
||
if (pagesCount > PagesCountLimit.FORCE_SCROLL_MODE_PAGE) {
|
||
console.warn(
|
||
"Forcing PAGE-scrolling for performance reasons, given the length of the document."
|
||
);
|
||
const mode = (this._scrollMode = ScrollMode.PAGE);
|
||
this.eventBus.dispatch("scrollmodechanged", { source: this, mode });
|
||
}
|
||
|
||
this._pagesCapability.promise.then(
|
||
() => {
|
||
this.eventBus.dispatch("pagesloaded", { source: this, pagesCount });
|
||
},
|
||
() => {
|
||
/* Prevent "Uncaught (in promise)"-messages in the console. */
|
||
}
|
||
);
|
||
|
||
this._onBeforeDraw = evt => {
|
||
const pageView = this._pages[evt.pageNumber - 1];
|
||
if (!pageView) {
|
||
return;
|
||
}
|
||
// Add the page to the buffer at the start of drawing. That way it can be
|
||
// evicted from the buffer and destroyed even if we pause its rendering.
|
||
this.#buffer.push(pageView);
|
||
};
|
||
this.eventBus._on("pagerender", this._onBeforeDraw);
|
||
|
||
this._onAfterDraw = evt => {
|
||
if (evt.cssTransform) {
|
||
return;
|
||
}
|
||
this._onePageRenderedCapability.resolve({ timestamp: evt.timestamp });
|
||
|
||
this.eventBus._off("pagerendered", this._onAfterDraw);
|
||
this._onAfterDraw = null;
|
||
};
|
||
this.eventBus._on("pagerendered", this._onAfterDraw);
|
||
|
||
// Fetch a single page so we can get a viewport that will be the default
|
||
// viewport for all pages
|
||
Promise.all([firstPagePromise, permissionsPromise])
|
||
.then(([firstPdfPage, permissions]) => {
|
||
if (pdfDocument !== this.pdfDocument) {
|
||
return; // The document was closed while the first page resolved.
|
||
}
|
||
this._firstPageCapability.resolve(firstPdfPage);
|
||
this._optionalContentConfigPromise = optionalContentConfigPromise;
|
||
|
||
const { annotationEditorMode, annotationMode, textLayerMode } =
|
||
this.#initializePermissions(permissions);
|
||
|
||
if (textLayerMode !== TextLayerMode.DISABLE) {
|
||
const element = (this.#hiddenCopyElement =
|
||
document.createElement("div"));
|
||
element.id = "hiddenCopyElement";
|
||
this.viewer.before(element);
|
||
}
|
||
|
||
if (annotationEditorMode !== AnnotationEditorType.DISABLE) {
|
||
const mode = annotationEditorMode;
|
||
|
||
if (pdfDocument.isPureXfa) {
|
||
console.warn("Warning: XFA-editing is not implemented.");
|
||
} else if (isValidAnnotationEditorMode(mode)) {
|
||
this.#annotationEditorUIManager = new AnnotationEditorUIManager(
|
||
this.container,
|
||
this.viewer,
|
||
this.#altTextManager,
|
||
this.eventBus,
|
||
pdfDocument,
|
||
this.pageColors,
|
||
this.#annotationEditorHighlightColors,
|
||
this.#enableHighlightFloatingButton,
|
||
this.#mlManager
|
||
);
|
||
this.eventBus.dispatch("annotationeditoruimanager", {
|
||
source: this,
|
||
uiManager: this.#annotationEditorUIManager,
|
||
});
|
||
if (mode !== AnnotationEditorType.NONE) {
|
||
this.#annotationEditorUIManager.updateMode(mode);
|
||
}
|
||
} else {
|
||
console.error(`Invalid AnnotationEditor mode: ${mode}`);
|
||
}
|
||
}
|
||
|
||
const viewerElement =
|
||
this._scrollMode === ScrollMode.PAGE ? null : this.viewer;
|
||
const scale = this.currentScale;
|
||
const viewport = firstPdfPage.getViewport({
|
||
scale: scale * PixelsPerInch.PDF_TO_CSS_UNITS,
|
||
});
|
||
// Ensure that the various layers always get the correct initial size,
|
||
// see issue 15795.
|
||
this.viewer.style.setProperty("--scale-factor", viewport.scale);
|
||
if (
|
||
this.pageColors?.foreground === "CanvasText" ||
|
||
this.pageColors?.background === "Canvas"
|
||
) {
|
||
this.viewer.style.setProperty(
|
||
"--hcm-highlight-filter",
|
||
pdfDocument.filterFactory.addHighlightHCMFilter(
|
||
"highlight",
|
||
"CanvasText",
|
||
"Canvas",
|
||
"HighlightText",
|
||
"Highlight"
|
||
)
|
||
);
|
||
this.viewer.style.setProperty(
|
||
"--hcm-highlight-selected-filter",
|
||
pdfDocument.filterFactory.addHighlightHCMFilter(
|
||
"highlight_selected",
|
||
"CanvasText",
|
||
"Canvas",
|
||
"HighlightText",
|
||
"ButtonText"
|
||
)
|
||
);
|
||
}
|
||
|
||
for (let pageNum = 1; pageNum <= pagesCount; ++pageNum) {
|
||
const pageView = new PDFPageView({
|
||
container: viewerElement,
|
||
eventBus: this.eventBus,
|
||
id: pageNum,
|
||
scale,
|
||
defaultViewport: viewport.clone(),
|
||
optionalContentConfigPromise,
|
||
renderingQueue: this.renderingQueue,
|
||
textLayerMode,
|
||
annotationMode,
|
||
imageResourcesPath: this.imageResourcesPath,
|
||
maxCanvasPixels: this.maxCanvasPixels,
|
||
pageColors: this.pageColors,
|
||
l10n: this.l10n,
|
||
layerProperties: this._layerProperties,
|
||
});
|
||
this._pages.push(pageView);
|
||
}
|
||
// Set the first `pdfPage` immediately, since it's already loaded,
|
||
// rather than having to repeat the `PDFDocumentProxy.getPage` call in
|
||
// the `this.#ensurePdfPageLoaded` method before rendering can start.
|
||
const firstPageView = this._pages[0];
|
||
if (firstPageView) {
|
||
firstPageView.setPdfPage(firstPdfPage);
|
||
this.linkService.cachePageRef(1, firstPdfPage.ref);
|
||
}
|
||
|
||
if (this._scrollMode === ScrollMode.PAGE) {
|
||
// Ensure that the current page becomes visible on document load.
|
||
this.#ensurePageViewVisible();
|
||
} else if (this._spreadMode !== SpreadMode.NONE) {
|
||
this._updateSpreadMode();
|
||
}
|
||
|
||
// Fetch all the pages since the viewport is needed before printing
|
||
// starts to create the correct size canvas. Wait until one page is
|
||
// rendered so we don't tie up too many resources early on.
|
||
this.#onePageRenderedOrForceFetch().then(async () => {
|
||
this.findController?.setDocument(pdfDocument); // Enable searching.
|
||
this._scriptingManager?.setDocument(pdfDocument); // Enable scripting.
|
||
|
||
if (this.#hiddenCopyElement) {
|
||
this.#copyCallbackBound = this.#copyCallback.bind(
|
||
this,
|
||
textLayerMode
|
||
);
|
||
document.addEventListener("copy", this.#copyCallbackBound);
|
||
}
|
||
|
||
if (this.#annotationEditorUIManager) {
|
||
// Ensure that the Editor buttons, in the toolbar, are updated.
|
||
this.eventBus.dispatch("annotationeditormodechanged", {
|
||
source: this,
|
||
mode: this.#annotationEditorMode,
|
||
});
|
||
}
|
||
|
||
// In addition to 'disableAutoFetch' being set, also attempt to reduce
|
||
// resource usage when loading *very* long/large documents.
|
||
if (
|
||
pdfDocument.loadingParams.disableAutoFetch ||
|
||
pagesCount > PagesCountLimit.FORCE_LAZY_PAGE_INIT
|
||
) {
|
||
// XXX: Printing is semi-broken with auto fetch disabled.
|
||
this._pagesCapability.resolve();
|
||
return;
|
||
}
|
||
let getPagesLeft = pagesCount - 1; // The first page was already loaded.
|
||
|
||
if (getPagesLeft <= 0) {
|
||
this._pagesCapability.resolve();
|
||
return;
|
||
}
|
||
for (let pageNum = 2; pageNum <= pagesCount; ++pageNum) {
|
||
const promise = pdfDocument.getPage(pageNum).then(
|
||
pdfPage => {
|
||
const pageView = this._pages[pageNum - 1];
|
||
if (!pageView.pdfPage) {
|
||
pageView.setPdfPage(pdfPage);
|
||
}
|
||
this.linkService.cachePageRef(pageNum, pdfPage.ref);
|
||
if (--getPagesLeft === 0) {
|
||
this._pagesCapability.resolve();
|
||
}
|
||
},
|
||
reason => {
|
||
console.error(
|
||
`Unable to get page ${pageNum} to initialize viewer`,
|
||
reason
|
||
);
|
||
if (--getPagesLeft === 0) {
|
||
this._pagesCapability.resolve();
|
||
}
|
||
}
|
||
);
|
||
|
||
if (pageNum % PagesCountLimit.PAUSE_EAGER_PAGE_INIT === 0) {
|
||
await promise;
|
||
}
|
||
}
|
||
});
|
||
|
||
this.eventBus.dispatch("pagesinit", { source: this });
|
||
|
||
pdfDocument.getMetadata().then(({ info }) => {
|
||
if (pdfDocument !== this.pdfDocument) {
|
||
return; // The document was closed while the metadata resolved.
|
||
}
|
||
if (info.Language) {
|
||
this.viewer.lang = info.Language;
|
||
}
|
||
});
|
||
|
||
if (this.defaultRenderingQueue) {
|
||
this.update();
|
||
}
|
||
})
|
||
.catch(reason => {
|
||
console.error("Unable to initialize viewer", reason);
|
||
|
||
this._pagesCapability.reject(reason);
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @param {Array|null} labels
|
||
*/
|
||
setPageLabels(labels) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
if (!labels) {
|
||
this._pageLabels = null;
|
||
} else if (
|
||
!(Array.isArray(labels) && this.pdfDocument.numPages === labels.length)
|
||
) {
|
||
this._pageLabels = null;
|
||
console.error(`setPageLabels: Invalid page labels.`);
|
||
} else {
|
||
this._pageLabels = labels;
|
||
}
|
||
// Update all the `PDFPageView` instances.
|
||
for (let i = 0, ii = this._pages.length; i < ii; i++) {
|
||
this._pages[i].setPageLabel(this._pageLabels?.[i] ?? null);
|
||
}
|
||
}
|
||
|
||
_resetView() {
|
||
this._pages = [];
|
||
this._currentPageNumber = 1;
|
||
this._currentScale = UNKNOWN_SCALE;
|
||
this._currentScaleValue = null;
|
||
this._pageLabels = null;
|
||
this.#buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);
|
||
this._location = null;
|
||
this._pagesRotation = 0;
|
||
this._optionalContentConfigPromise = null;
|
||
this._firstPageCapability = Promise.withResolvers();
|
||
this._onePageRenderedCapability = Promise.withResolvers();
|
||
this._pagesCapability = Promise.withResolvers();
|
||
this._scrollMode = ScrollMode.VERTICAL;
|
||
this._previousScrollMode = ScrollMode.UNKNOWN;
|
||
this._spreadMode = SpreadMode.NONE;
|
||
|
||
this.#scrollModePageState = {
|
||
previousPageNumber: 1,
|
||
scrollDown: true,
|
||
pages: [],
|
||
};
|
||
|
||
if (this._onBeforeDraw) {
|
||
this.eventBus._off("pagerender", this._onBeforeDraw);
|
||
this._onBeforeDraw = null;
|
||
}
|
||
if (this._onAfterDraw) {
|
||
this.eventBus._off("pagerendered", this._onAfterDraw);
|
||
this._onAfterDraw = null;
|
||
}
|
||
if (this.#onVisibilityChange) {
|
||
document.removeEventListener(
|
||
"visibilitychange",
|
||
this.#onVisibilityChange
|
||
);
|
||
this.#onVisibilityChange = null;
|
||
}
|
||
// Remove the pages from the DOM...
|
||
this.viewer.textContent = "";
|
||
// ... and reset the Scroll mode CSS class(es) afterwards.
|
||
this._updateScrollMode();
|
||
|
||
this.viewer.removeAttribute("lang");
|
||
|
||
if (this.#hiddenCopyElement) {
|
||
document.removeEventListener("copy", this.#copyCallbackBound);
|
||
this.#copyCallbackBound = null;
|
||
|
||
this.#hiddenCopyElement.remove();
|
||
this.#hiddenCopyElement = null;
|
||
}
|
||
}
|
||
|
||
#ensurePageViewVisible() {
|
||
if (this._scrollMode !== ScrollMode.PAGE) {
|
||
throw new Error("#ensurePageViewVisible: Invalid scrollMode value.");
|
||
}
|
||
const pageNumber = this._currentPageNumber,
|
||
state = this.#scrollModePageState,
|
||
viewer = this.viewer;
|
||
|
||
// Temporarily remove all the pages from the DOM...
|
||
viewer.textContent = "";
|
||
// ... and clear out the active ones.
|
||
state.pages.length = 0;
|
||
|
||
if (this._spreadMode === SpreadMode.NONE && !this.isInPresentationMode) {
|
||
// Finally, append the new page to the viewer.
|
||
const pageView = this._pages[pageNumber - 1];
|
||
viewer.append(pageView.div);
|
||
|
||
state.pages.push(pageView);
|
||
} else {
|
||
const pageIndexSet = new Set(),
|
||
parity = this._spreadMode - 1;
|
||
|
||
// Determine the pageIndices in the new spread.
|
||
if (parity === -1) {
|
||
// PresentationMode is active, with `SpreadMode.NONE` set.
|
||
pageIndexSet.add(pageNumber - 1);
|
||
} else if (pageNumber % 2 !== parity) {
|
||
// Left-hand side page.
|
||
pageIndexSet.add(pageNumber - 1);
|
||
pageIndexSet.add(pageNumber);
|
||
} else {
|
||
// Right-hand side page.
|
||
pageIndexSet.add(pageNumber - 2);
|
||
pageIndexSet.add(pageNumber - 1);
|
||
}
|
||
|
||
// Finally, append the new pages to the viewer and apply the spreadMode.
|
||
const spread = document.createElement("div");
|
||
spread.className = "spread";
|
||
|
||
if (this.isInPresentationMode) {
|
||
const dummyPage = document.createElement("div");
|
||
dummyPage.className = "dummyPage";
|
||
spread.append(dummyPage);
|
||
}
|
||
|
||
for (const i of pageIndexSet) {
|
||
const pageView = this._pages[i];
|
||
if (!pageView) {
|
||
continue;
|
||
}
|
||
spread.append(pageView.div);
|
||
|
||
state.pages.push(pageView);
|
||
}
|
||
viewer.append(spread);
|
||
}
|
||
|
||
state.scrollDown = pageNumber >= state.previousPageNumber;
|
||
state.previousPageNumber = pageNumber;
|
||
}
|
||
|
||
_scrollUpdate() {
|
||
if (this.pagesCount === 0) {
|
||
return;
|
||
}
|
||
this.update();
|
||
}
|
||
|
||
#scrollIntoView(pageView, pageSpot = null) {
|
||
const { div, id } = pageView;
|
||
|
||
// Ensure that `this._currentPageNumber` is correct, when `#scrollIntoView`
|
||
// is called directly (and not from `#resetCurrentPageView`).
|
||
if (this._currentPageNumber !== id) {
|
||
this._setCurrentPageNumber(id);
|
||
}
|
||
if (this._scrollMode === ScrollMode.PAGE) {
|
||
this.#ensurePageViewVisible();
|
||
// Ensure that rendering always occurs, to avoid showing a blank page,
|
||
// even if the current position doesn't change when the page is scrolled.
|
||
this.update();
|
||
}
|
||
|
||
if (!pageSpot && !this.isInPresentationMode) {
|
||
const left = div.offsetLeft + div.clientLeft,
|
||
right = left + div.clientWidth;
|
||
const { scrollLeft, clientWidth } = this.container;
|
||
if (
|
||
this._scrollMode === ScrollMode.HORIZONTAL ||
|
||
left < scrollLeft ||
|
||
right > scrollLeft + clientWidth
|
||
) {
|
||
pageSpot = { left: 0, top: 0 };
|
||
}
|
||
}
|
||
scrollIntoView(div, pageSpot);
|
||
|
||
// Ensure that the correct *initial* document position is set, when any
|
||
// OpenParameters are used, for documents with non-default Scroll/Spread
|
||
// modes (fixes issue 15695). This is necessary since the scroll-handler
|
||
// invokes the `update`-method asynchronously, and `this._location` could
|
||
// thus be wrong when the initial zooming occurs in the default viewer.
|
||
if (!this._currentScaleValue && this._location) {
|
||
this._location = null;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Prevent unnecessary re-rendering of all pages when the scale changes
|
||
* only because of limited numerical precision.
|
||
*/
|
||
#isSameScale(newScale) {
|
||
return (
|
||
newScale === this._currentScale ||
|
||
Math.abs(newScale - this._currentScale) < 1e-15
|
||
);
|
||
}
|
||
|
||
#setScaleUpdatePages(
|
||
newScale,
|
||
newValue,
|
||
{ noScroll = false, preset = false, drawingDelay = -1 }
|
||
) {
|
||
this._currentScaleValue = newValue.toString();
|
||
|
||
if (this.#isSameScale(newScale)) {
|
||
if (preset) {
|
||
this.eventBus.dispatch("scalechanging", {
|
||
source: this,
|
||
scale: newScale,
|
||
presetValue: newValue,
|
||
});
|
||
}
|
||
return;
|
||
}
|
||
|
||
this.viewer.style.setProperty(
|
||
"--scale-factor",
|
||
newScale * PixelsPerInch.PDF_TO_CSS_UNITS
|
||
);
|
||
|
||
const postponeDrawing = drawingDelay >= 0 && drawingDelay < 1000;
|
||
this.refresh(true, {
|
||
scale: newScale,
|
||
drawingDelay: postponeDrawing ? drawingDelay : -1,
|
||
});
|
||
|
||
if (postponeDrawing) {
|
||
this.#scaleTimeoutId = setTimeout(() => {
|
||
this.#scaleTimeoutId = null;
|
||
this.refresh();
|
||
}, drawingDelay);
|
||
}
|
||
|
||
this._currentScale = newScale;
|
||
|
||
if (!noScroll) {
|
||
let page = this._currentPageNumber,
|
||
dest;
|
||
if (
|
||
this._location &&
|
||
!(this.isInPresentationMode || this.isChangingPresentationMode)
|
||
) {
|
||
page = this._location.pageNumber;
|
||
dest = [
|
||
null,
|
||
{ name: "XYZ" },
|
||
this._location.left,
|
||
this._location.top,
|
||
null,
|
||
];
|
||
}
|
||
this.scrollPageIntoView({
|
||
pageNumber: page,
|
||
destArray: dest,
|
||
allowNegativeOffset: true,
|
||
});
|
||
}
|
||
|
||
this.eventBus.dispatch("scalechanging", {
|
||
source: this,
|
||
scale: newScale,
|
||
presetValue: preset ? newValue : undefined,
|
||
});
|
||
|
||
if (this.defaultRenderingQueue) {
|
||
this.update();
|
||
}
|
||
}
|
||
|
||
get #pageWidthScaleFactor() {
|
||
if (
|
||
this._spreadMode !== SpreadMode.NONE &&
|
||
this._scrollMode !== ScrollMode.HORIZONTAL
|
||
) {
|
||
return 2;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
#setScale(value, options) {
|
||
let scale = parseFloat(value);
|
||
|
||
if (scale > 0) {
|
||
options.preset = false;
|
||
this.#setScaleUpdatePages(scale, value, options);
|
||
} else {
|
||
const currentPage = this._pages[this._currentPageNumber - 1];
|
||
if (!currentPage) {
|
||
return;
|
||
}
|
||
let hPadding = SCROLLBAR_PADDING,
|
||
vPadding = VERTICAL_PADDING;
|
||
|
||
if (this.isInPresentationMode) {
|
||
// Pages have a 2px (transparent) border in PresentationMode, see
|
||
// the `web/pdf_viewer.css` file.
|
||
hPadding = vPadding = 4; // 2 * 2px
|
||
if (this._spreadMode !== SpreadMode.NONE) {
|
||
// Account for two pages being visible in PresentationMode, thus
|
||
// "doubling" the total border width.
|
||
hPadding *= 2;
|
||
}
|
||
} else if (
|
||
(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
|
||
this.removePageBorders
|
||
) {
|
||
hPadding = vPadding = 0;
|
||
} else if (this._scrollMode === ScrollMode.HORIZONTAL) {
|
||
[hPadding, vPadding] = [vPadding, hPadding]; // Swap the padding values.
|
||
}
|
||
const pageWidthScale =
|
||
(((this.container.clientWidth - hPadding) / currentPage.width) *
|
||
currentPage.scale) /
|
||
this.#pageWidthScaleFactor;
|
||
const pageHeightScale =
|
||
((this.container.clientHeight - vPadding) / currentPage.height) *
|
||
currentPage.scale;
|
||
switch (value) {
|
||
case "page-actual":
|
||
scale = 1;
|
||
break;
|
||
case "page-width":
|
||
scale = pageWidthScale;
|
||
break;
|
||
case "page-height":
|
||
scale = pageHeightScale;
|
||
break;
|
||
case "page-fit":
|
||
scale = Math.min(pageWidthScale, pageHeightScale);
|
||
break;
|
||
case "auto":
|
||
// For pages in landscape mode, fit the page height to the viewer
|
||
// *unless* the page would thus become too wide to fit horizontally.
|
||
const horizontalScale = isPortraitOrientation(currentPage)
|
||
? pageWidthScale
|
||
: Math.min(pageHeightScale, pageWidthScale);
|
||
scale = Math.min(MAX_AUTO_SCALE, horizontalScale);
|
||
break;
|
||
default:
|
||
console.error(`#setScale: "${value}" is an unknown zoom value.`);
|
||
return;
|
||
}
|
||
options.preset = true;
|
||
this.#setScaleUpdatePages(scale, value, options);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Refreshes page view: scrolls to the current page and updates the scale.
|
||
*/
|
||
#resetCurrentPageView() {
|
||
const pageView = this._pages[this._currentPageNumber - 1];
|
||
|
||
if (this.isInPresentationMode) {
|
||
// Fixes the case when PDF has different page sizes.
|
||
this.#setScale(this._currentScaleValue, { noScroll: true });
|
||
}
|
||
this.#scrollIntoView(pageView);
|
||
}
|
||
|
||
/**
|
||
* @param {string} label - The page label.
|
||
* @returns {number|null} The page number corresponding to the page label,
|
||
* or `null` when no page labels exist and/or the input is invalid.
|
||
*/
|
||
pageLabelToPageNumber(label) {
|
||
if (!this._pageLabels) {
|
||
return null;
|
||
}
|
||
const i = this._pageLabels.indexOf(label);
|
||
if (i < 0) {
|
||
return null;
|
||
}
|
||
return i + 1;
|
||
}
|
||
|
||
/**
|
||
* @typedef {Object} ScrollPageIntoViewParameters
|
||
* @property {number} pageNumber - The page number.
|
||
* @property {Array} [destArray] - The original PDF destination array, in the
|
||
* format: <page-ref> </XYZ|/FitXXX> <args..>
|
||
* @property {boolean} [allowNegativeOffset] - Allow negative page offsets.
|
||
* The default value is `false`.
|
||
* @property {boolean} [ignoreDestinationZoom] - Ignore the zoom argument in
|
||
* the destination array. The default value is `false`.
|
||
*/
|
||
|
||
/**
|
||
* Scrolls page into view.
|
||
* @param {ScrollPageIntoViewParameters} params
|
||
*/
|
||
scrollPageIntoView({
|
||
pageNumber,
|
||
destArray = null,
|
||
allowNegativeOffset = false,
|
||
ignoreDestinationZoom = false,
|
||
}) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
const pageView =
|
||
Number.isInteger(pageNumber) && this._pages[pageNumber - 1];
|
||
if (!pageView) {
|
||
console.error(
|
||
`scrollPageIntoView: "${pageNumber}" is not a valid pageNumber parameter.`
|
||
);
|
||
return;
|
||
}
|
||
|
||
if (this.isInPresentationMode || !destArray) {
|
||
this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);
|
||
return;
|
||
}
|
||
let x = 0,
|
||
y = 0;
|
||
let width = 0,
|
||
height = 0,
|
||
widthScale,
|
||
heightScale;
|
||
const changeOrientation = pageView.rotation % 180 !== 0;
|
||
const pageWidth =
|
||
(changeOrientation ? pageView.height : pageView.width) /
|
||
pageView.scale /
|
||
PixelsPerInch.PDF_TO_CSS_UNITS;
|
||
const pageHeight =
|
||
(changeOrientation ? pageView.width : pageView.height) /
|
||
pageView.scale /
|
||
PixelsPerInch.PDF_TO_CSS_UNITS;
|
||
let scale = 0;
|
||
switch (destArray[1].name) {
|
||
case "XYZ":
|
||
x = destArray[2];
|
||
y = destArray[3];
|
||
scale = destArray[4];
|
||
// If x and/or y coordinates are not supplied, default to
|
||
// _top_ left of the page (not the obvious bottom left,
|
||
// since aligning the bottom of the intended page with the
|
||
// top of the window is rarely helpful).
|
||
x = x !== null ? x : 0;
|
||
y = y !== null ? y : pageHeight;
|
||
break;
|
||
case "Fit":
|
||
case "FitB":
|
||
scale = "page-fit";
|
||
break;
|
||
case "FitH":
|
||
case "FitBH":
|
||
y = destArray[2];
|
||
scale = "page-width";
|
||
// According to the PDF spec, section 12.3.2.2, a `null` value in the
|
||
// parameter should maintain the position relative to the new page.
|
||
if (y === null && this._location) {
|
||
x = this._location.left;
|
||
y = this._location.top;
|
||
} else if (typeof y !== "number" || y < 0) {
|
||
// The "top" value isn't optional, according to the spec, however some
|
||
// bad PDF generators will pretend that it is (fixes bug 1663390).
|
||
y = pageHeight;
|
||
}
|
||
break;
|
||
case "FitV":
|
||
case "FitBV":
|
||
x = destArray[2];
|
||
width = pageWidth;
|
||
height = pageHeight;
|
||
scale = "page-height";
|
||
break;
|
||
case "FitR":
|
||
x = destArray[2];
|
||
y = destArray[3];
|
||
width = destArray[4] - x;
|
||
height = destArray[5] - y;
|
||
let hPadding = SCROLLBAR_PADDING,
|
||
vPadding = VERTICAL_PADDING;
|
||
|
||
if (
|
||
(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
|
||
this.removePageBorders
|
||
) {
|
||
hPadding = vPadding = 0;
|
||
}
|
||
widthScale =
|
||
(this.container.clientWidth - hPadding) /
|
||
width /
|
||
PixelsPerInch.PDF_TO_CSS_UNITS;
|
||
heightScale =
|
||
(this.container.clientHeight - vPadding) /
|
||
height /
|
||
PixelsPerInch.PDF_TO_CSS_UNITS;
|
||
scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));
|
||
break;
|
||
default:
|
||
console.error(
|
||
`scrollPageIntoView: "${destArray[1].name}" is not a valid destination type.`
|
||
);
|
||
return;
|
||
}
|
||
|
||
if (!ignoreDestinationZoom) {
|
||
if (scale && scale !== this._currentScale) {
|
||
this.currentScaleValue = scale;
|
||
} else if (this._currentScale === UNKNOWN_SCALE) {
|
||
this.currentScaleValue = DEFAULT_SCALE_VALUE;
|
||
}
|
||
}
|
||
|
||
if (scale === "page-fit" && !destArray[4]) {
|
||
this.#scrollIntoView(pageView);
|
||
return;
|
||
}
|
||
|
||
const boundingRect = [
|
||
pageView.viewport.convertToViewportPoint(x, y),
|
||
pageView.viewport.convertToViewportPoint(x + width, y + height),
|
||
];
|
||
let left = Math.min(boundingRect[0][0], boundingRect[1][0]);
|
||
let top = Math.min(boundingRect[0][1], boundingRect[1][1]);
|
||
|
||
if (!allowNegativeOffset) {
|
||
// Some bad PDF generators will create destinations with e.g. top values
|
||
// that exceeds the page height. Ensure that offsets are not negative,
|
||
// to prevent a previous page from becoming visible (fixes bug 874482).
|
||
left = Math.max(left, 0);
|
||
top = Math.max(top, 0);
|
||
}
|
||
this.#scrollIntoView(pageView, /* pageSpot = */ { left, top });
|
||
}
|
||
|
||
_updateLocation(firstPage) {
|
||
const currentScale = this._currentScale;
|
||
const currentScaleValue = this._currentScaleValue;
|
||
const normalizedScaleValue =
|
||
parseFloat(currentScaleValue) === currentScale
|
||
? Math.round(currentScale * 10000) / 100
|
||
: currentScaleValue;
|
||
|
||
const pageNumber = firstPage.id;
|
||
const currentPageView = this._pages[pageNumber - 1];
|
||
const container = this.container;
|
||
const topLeft = currentPageView.getPagePoint(
|
||
container.scrollLeft - firstPage.x,
|
||
container.scrollTop - firstPage.y
|
||
);
|
||
const intLeft = Math.round(topLeft[0]);
|
||
const intTop = Math.round(topLeft[1]);
|
||
|
||
let pdfOpenParams = `#page=${pageNumber}`;
|
||
if (!this.isInPresentationMode) {
|
||
pdfOpenParams += `&zoom=${normalizedScaleValue},${intLeft},${intTop}`;
|
||
}
|
||
|
||
this._location = {
|
||
pageNumber,
|
||
scale: normalizedScaleValue,
|
||
top: intTop,
|
||
left: intLeft,
|
||
rotation: this._pagesRotation,
|
||
pdfOpenParams,
|
||
};
|
||
}
|
||
|
||
update() {
|
||
const visible = this._getVisiblePages();
|
||
const visiblePages = visible.views,
|
||
numVisiblePages = visiblePages.length;
|
||
|
||
if (numVisiblePages === 0) {
|
||
return;
|
||
}
|
||
const newCacheSize = Math.max(DEFAULT_CACHE_SIZE, 2 * numVisiblePages + 1);
|
||
this.#buffer.resize(newCacheSize, visible.ids);
|
||
|
||
this.renderingQueue.renderHighestPriority(visible);
|
||
|
||
const isSimpleLayout =
|
||
this._spreadMode === SpreadMode.NONE &&
|
||
(this._scrollMode === ScrollMode.PAGE ||
|
||
this._scrollMode === ScrollMode.VERTICAL);
|
||
const currentId = this._currentPageNumber;
|
||
let stillFullyVisible = false;
|
||
|
||
for (const page of visiblePages) {
|
||
if (page.percent < 100) {
|
||
break;
|
||
}
|
||
if (page.id === currentId && isSimpleLayout) {
|
||
stillFullyVisible = true;
|
||
break;
|
||
}
|
||
}
|
||
this._setCurrentPageNumber(
|
||
stillFullyVisible ? currentId : visiblePages[0].id
|
||
);
|
||
|
||
this._updateLocation(visible.first);
|
||
this.eventBus.dispatch("updateviewarea", {
|
||
source: this,
|
||
location: this._location,
|
||
});
|
||
}
|
||
|
||
containsElement(element) {
|
||
return this.container.contains(element);
|
||
}
|
||
|
||
focus() {
|
||
this.container.focus();
|
||
}
|
||
|
||
get _isContainerRtl() {
|
||
return getComputedStyle(this.container).direction === "rtl";
|
||
}
|
||
|
||
get isInPresentationMode() {
|
||
return this.presentationModeState === PresentationModeState.FULLSCREEN;
|
||
}
|
||
|
||
get isChangingPresentationMode() {
|
||
return this.presentationModeState === PresentationModeState.CHANGING;
|
||
}
|
||
|
||
get isHorizontalScrollbarEnabled() {
|
||
return this.isInPresentationMode
|
||
? false
|
||
: this.container.scrollWidth > this.container.clientWidth;
|
||
}
|
||
|
||
get isVerticalScrollbarEnabled() {
|
||
return this.isInPresentationMode
|
||
? false
|
||
: this.container.scrollHeight > this.container.clientHeight;
|
||
}
|
||
|
||
_getVisiblePages() {
|
||
const views =
|
||
this._scrollMode === ScrollMode.PAGE
|
||
? this.#scrollModePageState.pages
|
||
: this._pages,
|
||
horizontal = this._scrollMode === ScrollMode.HORIZONTAL,
|
||
rtl = horizontal && this._isContainerRtl;
|
||
|
||
return getVisibleElements({
|
||
scrollEl: this.container,
|
||
views,
|
||
sortByVisibility: true,
|
||
horizontal,
|
||
rtl,
|
||
});
|
||
}
|
||
|
||
cleanup() {
|
||
for (const pageView of this._pages) {
|
||
if (pageView.renderingState !== RenderingStates.FINISHED) {
|
||
pageView.reset();
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @private
|
||
*/
|
||
_cancelRendering() {
|
||
for (const pageView of this._pages) {
|
||
pageView.cancelRendering();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param {PDFPageView} pageView
|
||
* @returns {Promise<PDFPageProxy | null>}
|
||
*/
|
||
async #ensurePdfPageLoaded(pageView) {
|
||
if (pageView.pdfPage) {
|
||
return pageView.pdfPage;
|
||
}
|
||
try {
|
||
const pdfPage = await this.pdfDocument.getPage(pageView.id);
|
||
if (!pageView.pdfPage) {
|
||
pageView.setPdfPage(pdfPage);
|
||
}
|
||
if (!this.linkService._cachedPageNumber?.(pdfPage.ref)) {
|
||
this.linkService.cachePageRef(pageView.id, pdfPage.ref);
|
||
}
|
||
return pdfPage;
|
||
} catch (reason) {
|
||
console.error("Unable to get page for page view", reason);
|
||
return null; // Page error -- there is nothing that can be done.
|
||
}
|
||
}
|
||
|
||
#getScrollAhead(visible) {
|
||
if (visible.first?.id === 1) {
|
||
return true;
|
||
} else if (visible.last?.id === this.pagesCount) {
|
||
return false;
|
||
}
|
||
switch (this._scrollMode) {
|
||
case ScrollMode.PAGE:
|
||
return this.#scrollModePageState.scrollDown;
|
||
case ScrollMode.HORIZONTAL:
|
||
return this.scroll.right;
|
||
}
|
||
return this.scroll.down;
|
||
}
|
||
|
||
forceRendering(currentlyVisiblePages) {
|
||
const visiblePages = currentlyVisiblePages || this._getVisiblePages();
|
||
const scrollAhead = this.#getScrollAhead(visiblePages);
|
||
const preRenderExtra =
|
||
this._spreadMode !== SpreadMode.NONE &&
|
||
this._scrollMode !== ScrollMode.HORIZONTAL;
|
||
|
||
const pageView = this.renderingQueue.getHighestPriority(
|
||
visiblePages,
|
||
this._pages,
|
||
scrollAhead,
|
||
preRenderExtra
|
||
);
|
||
|
||
if (pageView) {
|
||
this.#ensurePdfPageLoaded(pageView).then(() => {
|
||
this.renderingQueue.renderView(pageView);
|
||
});
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @type {boolean} Whether all pages of the PDF document have identical
|
||
* widths and heights.
|
||
*/
|
||
get hasEqualPageSizes() {
|
||
const firstPageView = this._pages[0];
|
||
for (let i = 1, ii = this._pages.length; i < ii; ++i) {
|
||
const pageView = this._pages[i];
|
||
if (
|
||
pageView.width !== firstPageView.width ||
|
||
pageView.height !== firstPageView.height
|
||
) {
|
||
return false;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* Returns sizes of the pages.
|
||
* @returns {Array} Array of objects with width/height/rotation fields.
|
||
*/
|
||
getPagesOverview() {
|
||
let initialOrientation;
|
||
return this._pages.map(pageView => {
|
||
const viewport = pageView.pdfPage.getViewport({ scale: 1 });
|
||
const orientation = isPortraitOrientation(viewport);
|
||
if (initialOrientation === undefined) {
|
||
initialOrientation = orientation;
|
||
} else if (
|
||
this.enablePrintAutoRotate &&
|
||
orientation !== initialOrientation
|
||
) {
|
||
// Rotate to fit the initial orientation.
|
||
return {
|
||
width: viewport.height,
|
||
height: viewport.width,
|
||
rotation: (viewport.rotation - 90) % 360,
|
||
};
|
||
}
|
||
return {
|
||
width: viewport.width,
|
||
height: viewport.height,
|
||
rotation: viewport.rotation,
|
||
};
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @type {Promise<OptionalContentConfig | null>}
|
||
*/
|
||
get optionalContentConfigPromise() {
|
||
if (!this.pdfDocument) {
|
||
return Promise.resolve(null);
|
||
}
|
||
if (!this._optionalContentConfigPromise) {
|
||
console.error("optionalContentConfigPromise: Not initialized yet.");
|
||
// Prevent issues if the getter is accessed *before* the `onePageRendered`
|
||
// promise has resolved; won't (normally) happen in the default viewer.
|
||
return this.pdfDocument.getOptionalContentConfig({ intent: "display" });
|
||
}
|
||
return this._optionalContentConfigPromise;
|
||
}
|
||
|
||
/**
|
||
* @param {Promise<OptionalContentConfig>} promise - A promise that is
|
||
* resolved with an {@link OptionalContentConfig} instance.
|
||
*/
|
||
set optionalContentConfigPromise(promise) {
|
||
if (!(promise instanceof Promise)) {
|
||
throw new Error(`Invalid optionalContentConfigPromise: ${promise}`);
|
||
}
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
if (!this._optionalContentConfigPromise) {
|
||
// Ignore the setter *before* the `onePageRendered` promise has resolved,
|
||
// since it'll be overwritten anyway; won't happen in the default viewer.
|
||
return;
|
||
}
|
||
this._optionalContentConfigPromise = promise;
|
||
|
||
this.refresh(false, { optionalContentConfigPromise: promise });
|
||
|
||
this.eventBus.dispatch("optionalcontentconfigchanged", {
|
||
source: this,
|
||
promise,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @type {number} One of the values in {ScrollMode}.
|
||
*/
|
||
get scrollMode() {
|
||
return this._scrollMode;
|
||
}
|
||
|
||
/**
|
||
* @param {number} mode - The direction in which the document pages should be
|
||
* laid out within the scrolling container.
|
||
* The constants from {ScrollMode} should be used.
|
||
*/
|
||
set scrollMode(mode) {
|
||
if (
|
||
typeof PDFJSDev === "undefined"
|
||
? window.isGECKOVIEW
|
||
: PDFJSDev.test("GECKOVIEW")
|
||
) {
|
||
// NOTE: Always ignore the pageLayout in GeckoView since there's
|
||
// no UI available to change Scroll/Spread modes for the user.
|
||
return;
|
||
}
|
||
if (this._scrollMode === mode) {
|
||
return; // The Scroll mode didn't change.
|
||
}
|
||
if (!isValidScrollMode(mode)) {
|
||
throw new Error(`Invalid scroll mode: ${mode}`);
|
||
}
|
||
if (this.pagesCount > PagesCountLimit.FORCE_SCROLL_MODE_PAGE) {
|
||
return; // Disabled for performance reasons.
|
||
}
|
||
this._previousScrollMode = this._scrollMode;
|
||
|
||
this._scrollMode = mode;
|
||
this.eventBus.dispatch("scrollmodechanged", { source: this, mode });
|
||
|
||
this._updateScrollMode(/* pageNumber = */ this._currentPageNumber);
|
||
}
|
||
|
||
_updateScrollMode(pageNumber = null) {
|
||
const scrollMode = this._scrollMode,
|
||
viewer = this.viewer;
|
||
|
||
viewer.classList.toggle(
|
||
"scrollHorizontal",
|
||
scrollMode === ScrollMode.HORIZONTAL
|
||
);
|
||
viewer.classList.toggle("scrollWrapped", scrollMode === ScrollMode.WRAPPED);
|
||
|
||
if (!this.pdfDocument || !pageNumber) {
|
||
return;
|
||
}
|
||
|
||
if (scrollMode === ScrollMode.PAGE) {
|
||
this.#ensurePageViewVisible();
|
||
} else if (this._previousScrollMode === ScrollMode.PAGE) {
|
||
// Ensure that the current spreadMode is still applied correctly when
|
||
// the *previous* scrollMode was `ScrollMode.PAGE`.
|
||
this._updateSpreadMode();
|
||
}
|
||
// Non-numeric scale values can be sensitive to the scroll orientation.
|
||
// Call this before re-scrolling to the current page, to ensure that any
|
||
// changes in scale don't move the current page.
|
if (this._currentScaleValue && isNaN(this._currentScaleValue)) {
|
|
this.#setScale(this._currentScaleValue, { noScroll: true });
|
||
}
|
||
this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);
|
||
this.update();
|
||
}
|
||
|
||
/**
|
||
* @type {number} One of the values in {SpreadMode}.
|
||
*/
|
||
get spreadMode() {
|
||
return this._spreadMode;
|
||
}
|
||
|
||
/**
|
||
* @param {number} mode - Group the pages in spreads, starting with odd- or
|
||
* even-number pages (unless `SpreadMode.NONE` is used).
|
||
* The constants from {SpreadMode} should be used.
|
||
*/
|
||
set spreadMode(mode) {
|
||
if (
|
||
typeof PDFJSDev === "undefined"
|
||
? window.isGECKOVIEW
|
||
: PDFJSDev.test("GECKOVIEW")
|
||
) {
|
||
// NOTE: Always ignore the pageLayout in GeckoView since there's
|
||
// no UI available to change Scroll/Spread modes for the user.
|
||
return;
|
||
}
|
||
if (this._spreadMode === mode) {
|
||
return; // The Spread mode didn't change.
|
||
}
|
||
if (!isValidSpreadMode(mode)) {
|
||
throw new Error(`Invalid spread mode: ${mode}`);
|
||
}
|
||
this._spreadMode = mode;
|
||
this.eventBus.dispatch("spreadmodechanged", { source: this, mode });
|
||
|
||
this._updateSpreadMode(/* pageNumber = */ this._currentPageNumber);
|
||
}
|
||
|
||
_updateSpreadMode(pageNumber = null) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
const viewer = this.viewer,
|
||
pages = this._pages;
|
||
|
||
if (this._scrollMode === ScrollMode.PAGE) {
|
||
this.#ensurePageViewVisible();
|
||
} else {
|
||
// Temporarily remove all the pages from the DOM.
|
||
viewer.textContent = "";
|
||
|
||
if (this._spreadMode === SpreadMode.NONE) {
|
||
for (const pageView of this._pages) {
|
||
viewer.append(pageView.div);
|
||
}
|
||
} else {
|
||
const parity = this._spreadMode - 1;
|
||
let spread = null;
|
||
for (let i = 0, ii = pages.length; i < ii; ++i) {
|
||
if (spread === null) {
|
||
spread = document.createElement("div");
|
||
spread.className = "spread";
|
||
viewer.append(spread);
|
||
} else if (i % 2 === parity) {
|
||
spread = spread.cloneNode(false);
|
||
viewer.append(spread);
|
||
}
|
||
spread.append(pages[i].div);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!pageNumber) {
|
||
return;
|
||
}
|
||
// Non-numeric scale values can be sensitive to the scroll orientation.
|
||
// Call this before re-scrolling to the current page, to ensure that any
|
||
// changes in scale don't move the current page.
|
||
if (this._currentScaleValue && isNaN(this._currentScaleValue)) {
|
||
this.#setScale(this._currentScaleValue, { noScroll: true });
|
||
}
|
||
this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);
|
||
this.update();
|
||
}
|
||
|
||
/**
|
||
* @private
|
||
*/
|
||
_getPageAdvance(currentPageNumber, previous = false) {
|
||
switch (this._scrollMode) {
|
||
case ScrollMode.WRAPPED: {
|
||
const { views } = this._getVisiblePages(),
|
||
pageLayout = new Map();
|
||
|
||
// Determine the current (visible) page layout.
|
||
for (const { id, y, percent, widthPercent } of views) {
|
||
if (percent === 0 || widthPercent < 100) {
|
||
continue;
|
||
}
|
||
let yArray = pageLayout.get(y);
|
||
if (!yArray) {
|
||
pageLayout.set(y, (yArray ||= []));
|
||
}
|
||
yArray.push(id);
|
||
}
|
||
// Find the row of the current page.
|
||
for (const yArray of pageLayout.values()) {
|
||
const currentIndex = yArray.indexOf(currentPageNumber);
|
||
if (currentIndex === -1) {
|
||
continue;
|
||
}
|
||
const numPages = yArray.length;
|
||
if (numPages === 1) {
|
||
break;
|
||
}
|
||
// Handle documents with varying page sizes.
|
||
if (previous) {
|
||
for (let i = currentIndex - 1, ii = 0; i >= ii; i--) {
|
||
const currentId = yArray[i],
|
||
expectedId = yArray[i + 1] - 1;
|
||
if (currentId < expectedId) {
|
||
return currentPageNumber - expectedId;
|
||
}
|
||
}
|
||
} else {
|
||
for (let i = currentIndex + 1, ii = numPages; i < ii; i++) {
|
||
const currentId = yArray[i],
|
||
expectedId = yArray[i - 1] + 1;
|
||
if (currentId > expectedId) {
|
||
return expectedId - currentPageNumber;
|
||
}
|
||
}
|
||
}
|
||
// The current row is "complete", advance to the previous/next one.
|
||
if (previous) {
|
||
const firstId = yArray[0];
|
||
if (firstId < currentPageNumber) {
|
||
return currentPageNumber - firstId + 1;
|
||
}
|
||
} else {
|
||
const lastId = yArray[numPages - 1];
|
||
if (lastId > currentPageNumber) {
|
||
return lastId - currentPageNumber + 1;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
case ScrollMode.HORIZONTAL: {
|
||
break;
|
||
}
|
||
case ScrollMode.PAGE:
|
||
case ScrollMode.VERTICAL: {
|
||
if (this._spreadMode === SpreadMode.NONE) {
|
||
break; // Normal vertical scrolling.
|
||
}
|
||
const parity = this._spreadMode - 1;
|
||
|
||
if (previous && currentPageNumber % 2 !== parity) {
|
||
break; // Left-hand side page.
|
||
} else if (!previous && currentPageNumber % 2 === parity) {
|
||
break; // Right-hand side page.
|
||
}
|
||
const { views } = this._getVisiblePages(),
|
||
expectedId = previous ? currentPageNumber - 1 : currentPageNumber + 1;
|
||
|
||
for (const { id, percent, widthPercent } of views) {
|
||
if (id !== expectedId) {
|
||
continue;
|
||
}
|
||
if (percent > 0 && widthPercent === 100) {
|
||
return 2;
|
||
}
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/**
|
||
* Go to the next page, taking scroll/spread-modes into account.
|
||
* @returns {boolean} Whether navigation occurred.
|
||
*/
|
||
nextPage() {
|
||
const currentPageNumber = this._currentPageNumber,
|
||
pagesCount = this.pagesCount;
|
||
|
||
if (currentPageNumber >= pagesCount) {
|
||
return false;
|
||
}
|
||
const advance =
|
||
this._getPageAdvance(currentPageNumber, /* previous = */ false) || 1;
|
||
|
||
this.currentPageNumber = Math.min(currentPageNumber + advance, pagesCount);
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* Go to the previous page, taking scroll/spread-modes into account.
|
||
* @returns {boolean} Whether navigation occurred.
|
||
*/
|
||
previousPage() {
|
||
const currentPageNumber = this._currentPageNumber;
|
||
|
||
if (currentPageNumber <= 1) {
|
||
return false;
|
||
}
|
||
const advance =
|
||
this._getPageAdvance(currentPageNumber, /* previous = */ true) || 1;
|
||
|
||
this.currentPageNumber = Math.max(currentPageNumber - advance, 1);
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* @typedef {Object} ChangeScaleOptions
|
||
* @property {number} [drawingDelay]
|
||
* @property {number} [scaleFactor]
|
||
* @property {number} [steps]
|
||
*/
|
||
|
||
/**
|
||
* Increase the current zoom level one, or more, times.
|
||
* @param {ChangeScaleOptions} [options]
|
||
*/
|
||
increaseScale({ drawingDelay, scaleFactor, steps } = {}) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
let newScale = this._currentScale;
|
||
if (scaleFactor > 1) {
|
||
newScale = Math.round(newScale * scaleFactor * 100) / 100;
|
||
} else {
|
||
steps ??= 1;
|
||
do {
|
||
newScale =
|
||
Math.ceil((newScale * DEFAULT_SCALE_DELTA).toFixed(2) * 10) / 10;
|
||
} while (--steps > 0 && newScale < MAX_SCALE);
|
||
}
|
||
this.#setScale(Math.min(MAX_SCALE, newScale), {
|
||
noScroll: false,
|
||
drawingDelay,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Decrease the current zoom level one, or more, times.
|
||
* @param {ChangeScaleOptions} [options]
|
||
*/
|
||
decreaseScale({ drawingDelay, scaleFactor, steps } = {}) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
let newScale = this._currentScale;
|
||
if (scaleFactor > 0 && scaleFactor < 1) {
|
||
newScale = Math.round(newScale * scaleFactor * 100) / 100;
|
||
} else {
|
||
steps ??= 1;
|
||
do {
|
||
newScale =
|
||
Math.floor((newScale / DEFAULT_SCALE_DELTA).toFixed(2) * 10) / 10;
|
||
} while (--steps > 0 && newScale > MIN_SCALE);
|
||
}
|
||
this.#setScale(Math.max(MIN_SCALE, newScale), {
|
||
noScroll: false,
|
||
drawingDelay,
|
||
});
|
||
}
|
||
|
||
#updateContainerHeightCss(height = this.container.clientHeight) {
|
||
if (height !== this.#previousContainerHeight) {
|
||
this.#previousContainerHeight = height;
|
||
docStyle.setProperty("--viewer-container-height", `${height}px`);
|
||
}
|
||
}
|
||
|
||
#resizeObserverCallback(entries) {
|
||
for (const entry of entries) {
|
||
if (entry.target === this.container) {
|
||
this.#updateContainerHeightCss(
|
||
Math.floor(entry.borderBoxSize[0].blockSize)
|
||
);
|
||
this.#containerTopLeft = null;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
get containerTopLeft() {
|
||
return (this.#containerTopLeft ||= [
|
||
this.container.offsetTop,
|
||
this.container.offsetLeft,
|
||
]);
|
||
}
|
||
|
||
get annotationEditorMode() {
|
||
return this.#annotationEditorUIManager
|
||
? this.#annotationEditorMode
|
||
: AnnotationEditorType.DISABLE;
|
||
}
|
||
|
||
/**
|
||
* @typedef {Object} AnnotationEditorModeOptions
|
||
* @property {number} mode - The editor mode (none, FreeText, ink, ...).
|
||
* @property {string|null} [editId] - ID of the existing annotation to edit.
|
||
* @property {boolean} [isFromKeyboard] - True if the mode change is due to a
|
||
* keyboard action.
|
||
*/
|
||
|
||
/**
|
||
* @param {AnnotationEditorModeOptions} options
|
||
*/
|
||
set annotationEditorMode({ mode, editId = null, isFromKeyboard = false }) {
|
||
if (!this.#annotationEditorUIManager) {
|
||
throw new Error(`The AnnotationEditor is not enabled.`);
|
||
}
|
||
if (this.#annotationEditorMode === mode) {
|
||
return; // The AnnotationEditor mode didn't change.
|
||
}
|
||
if (!isValidAnnotationEditorMode(mode)) {
|
||
throw new Error(`Invalid AnnotationEditor mode: ${mode}`);
|
||
}
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
this.#annotationEditorMode = mode;
|
||
this.eventBus.dispatch("annotationeditormodechanged", {
|
||
source: this,
|
||
mode,
|
||
});
|
||
|
||
this.#annotationEditorUIManager.updateMode(mode, editId, isFromKeyboard);
|
||
}
|
||
|
||
// eslint-disable-next-line accessor-pairs
|
||
set annotationEditorParams({ type, value }) {
|
||
if (!this.#annotationEditorUIManager) {
|
||
throw new Error(`The AnnotationEditor is not enabled.`);
|
||
}
|
||
this.#annotationEditorUIManager.updateParams(type, value);
|
||
}
|
||
|
||
refresh(noUpdate = false, updateArgs = Object.create(null)) {
|
||
if (!this.pdfDocument) {
|
||
return;
|
||
}
|
||
for (const pageView of this._pages) {
|
||
pageView.update(updateArgs);
|
||
}
|
||
if (this.#scaleTimeoutId !== null) {
|
||
clearTimeout(this.#scaleTimeoutId);
|
||
this.#scaleTimeoutId = null;
|
||
}
|
||
if (!noUpdate) {
|
||
this.update();
|
||
}
|
||
}
|
||
}
|
||
|
||
export { PagesCountLimit, PDFPageViewBuffer, PDFViewer };
|