2260 lines
67 KiB
JavaScript
2260 lines
67 KiB
JavaScript
/* Copyright 2014 Mozilla Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/** @typedef {import("../src/display/api").PDFDocumentProxy} PDFDocumentProxy */
|
|
/** @typedef {import("../src/display/api").PDFPageProxy} PDFPageProxy */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("../src/display/display_utils").PageViewport} PageViewport */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("../src/display/optional_content_config").OptionalContentConfig} OptionalContentConfig */
|
|
/** @typedef {import("./event_utils").EventBus} EventBus */
|
|
/** @typedef {import("./interfaces").IDownloadManager} IDownloadManager */
|
|
/** @typedef {import("./interfaces").IL10n} IL10n */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("./interfaces").IPDFAnnotationLayerFactory} IPDFAnnotationLayerFactory */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("./interfaces").IPDFAnnotationEditorLayerFactory} IPDFAnnotationEditorLayerFactory */
|
|
/** @typedef {import("./interfaces").IPDFLinkService} IPDFLinkService */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("./interfaces").IPDFStructTreeLayerFactory} IPDFStructTreeLayerFactory */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("./interfaces").IPDFTextLayerFactory} IPDFTextLayerFactory */
|
|
/** @typedef {import("./interfaces").IPDFXfaLayerFactory} IPDFXfaLayerFactory */
|
|
// eslint-disable-next-line max-len
|
|
/** @typedef {import("./text_accessibility.js").TextAccessibilityManager} TextAccessibilityManager */
|
|
|
|
import {
|
|
AnnotationEditorType,
|
|
AnnotationEditorUIManager,
|
|
AnnotationMode,
|
|
createPromiseCapability,
|
|
PermissionFlag,
|
|
PixelsPerInch,
|
|
version,
|
|
} from "pdfjs-lib";
|
|
import {
|
|
DEFAULT_SCALE,
|
|
DEFAULT_SCALE_DELTA,
|
|
DEFAULT_SCALE_VALUE,
|
|
docStyle,
|
|
getVisibleElements,
|
|
isPortraitOrientation,
|
|
isValidRotation,
|
|
isValidScrollMode,
|
|
isValidSpreadMode,
|
|
MAX_AUTO_SCALE,
|
|
MAX_SCALE,
|
|
MIN_SCALE,
|
|
PresentationModeState,
|
|
RendererType,
|
|
RenderingStates,
|
|
SCROLLBAR_PADDING,
|
|
scrollIntoView,
|
|
ScrollMode,
|
|
SpreadMode,
|
|
TextLayerMode,
|
|
UNKNOWN_SCALE,
|
|
VERTICAL_PADDING,
|
|
watchScroll,
|
|
} from "./ui_utils.js";
|
|
import { AnnotationEditorLayerBuilder } from "./annotation_editor_layer_builder.js";
|
|
import { AnnotationLayerBuilder } from "./annotation_layer_builder.js";
|
|
import { NullL10n } from "./l10n_utils.js";
|
|
import { PDFPageView } from "./pdf_page_view.js";
|
|
import { PDFRenderingQueue } from "./pdf_rendering_queue.js";
|
|
import { SimpleLinkService } from "./pdf_link_service.js";
|
|
import { StructTreeLayerBuilder } from "./struct_tree_layer_builder.js";
|
|
import { TextHighlighter } from "./text_highlighter.js";
|
|
import { TextLayerBuilder } from "./text_layer_builder.js";
|
|
import { XfaLayerBuilder } from "./xfa_layer_builder.js";
|
|
|
|
const DEFAULT_CACHE_SIZE = 10;
|
|
const ENABLE_PERMISSIONS_CLASS = "enablePermissions";
|
|
|
|
const PagesCountLimit = {
|
|
FORCE_SCROLL_MODE_PAGE: 15000,
|
|
FORCE_LAZY_PAGE_INIT: 7500,
|
|
PAUSE_EAGER_PAGE_INIT: 250,
|
|
};
|
|
|
|
function isValidAnnotationEditorMode(mode) {
|
|
return (
|
|
Object.values(AnnotationEditorType).includes(mode) &&
|
|
mode !== AnnotationEditorType.DISABLE
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} PDFViewerOptions
|
|
* @property {HTMLDivElement} container - The container for the viewer element.
|
|
* @property {HTMLDivElement} [viewer] - The viewer element.
|
|
* @property {EventBus} eventBus - The application event bus.
|
|
* @property {IPDFLinkService} linkService - The navigation/linking service.
|
|
* @property {IDownloadManager} [downloadManager] - The download manager
|
|
* component.
|
|
* @property {PDFFindController} [findController] - The find controller
|
|
* component.
|
|
* @property {PDFScriptingManager} [scriptingManager] - The scripting manager
|
|
* component.
|
|
* @property {PDFRenderingQueue} [renderingQueue] - The rendering queue object.
|
|
* @property {boolean} [removePageBorders] - Removes the border shadow around
|
|
* the pages. The default value is `false`.
|
|
* @property {number} [textLayerMode] - Controls if the text layer used for
|
|
* selection and searching is created. The constants from {TextLayerMode}
|
|
* should be used. The default value is `TextLayerMode.ENABLE`.
|
|
* @property {number} [annotationMode] - Controls if the annotation layer is
|
|
* created, and if interactive form elements or `AnnotationStorage`-data are
|
|
* being rendered. The constants from {@link AnnotationMode} should be used;
|
|
* see also {@link RenderParameters} and {@link GetOperatorListParameters}.
|
|
* The default value is `AnnotationMode.ENABLE_FORMS`.
|
|
* @property {number} [annotationEditorMode] - Enables the creation and editing
|
|
* of new Annotations. The constants from {@link AnnotationEditorType} should
|
|
* be used. The default value is `AnnotationEditorType.DISABLE`.
|
|
* @property {string} [imageResourcesPath] - Path for image resources, mainly
|
|
* mainly for annotation icons. Include trailing slash.
|
|
* @property {boolean} [enablePrintAutoRotate] - Enables automatic rotation of
|
|
* landscape pages upon printing. The default is `false`.
|
|
* @property {boolean} [useOnlyCssZoom] - Enables CSS only zooming. The default
|
|
* value is `false`.
|
|
* @property {number} [maxCanvasPixels] - The maximum supported canvas size in
|
|
* total pixels, i.e. width * height. Use -1 for no limit. The default value
|
|
* is 4096 * 4096 (16 mega-pixels).
|
|
* @property {IL10n} l10n - Localization service.
|
|
* @property {boolean} [enablePermissions] - Enables PDF document permissions,
|
|
* when they exist. The default value is `false`.
|
|
* @property {Object} [pageColors] - Overwrites background and foreground colors
|
|
* with user defined ones in order to improve readability in high contrast
|
|
* mode.
|
|
*/
|
|
|
|
class PDFPageViewBuffer {
|
|
// Here we rely on the fact that `Set`s preserve the insertion order.
|
|
#buf = new Set();
|
|
|
|
#size = 0;
|
|
|
|
constructor(size) {
|
|
this.#size = size;
|
|
}
|
|
|
|
push(view) {
|
|
const buf = this.#buf;
|
|
if (buf.has(view)) {
|
|
buf.delete(view); // Move the view to the "end" of the buffer.
|
|
}
|
|
buf.add(view);
|
|
|
|
if (buf.size > this.#size) {
|
|
this.#destroyFirstView();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* After calling resize, the size of the buffer will be `newSize`.
|
|
* The optional parameter `idsToKeep` is, if present, a Set of page-ids to
|
|
* push to the back of the buffer, delaying their destruction. The size of
|
|
* `idsToKeep` has no impact on the final size of the buffer; if `idsToKeep`
|
|
* is larger than `newSize`, some of those pages will be destroyed anyway.
|
|
*/
|
|
resize(newSize, idsToKeep = null) {
|
|
this.#size = newSize;
|
|
|
|
const buf = this.#buf;
|
|
if (idsToKeep) {
|
|
const ii = buf.size;
|
|
let i = 1;
|
|
for (const view of buf) {
|
|
if (idsToKeep.has(view.id)) {
|
|
buf.delete(view); // Move the view to the "end" of the buffer.
|
|
buf.add(view);
|
|
}
|
|
if (++i > ii) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (buf.size > this.#size) {
|
|
this.#destroyFirstView();
|
|
}
|
|
}
|
|
|
|
has(view) {
|
|
return this.#buf.has(view);
|
|
}
|
|
|
|
[Symbol.iterator]() {
|
|
return this.#buf.keys();
|
|
}
|
|
|
|
#destroyFirstView() {
|
|
const firstView = this.#buf.keys().next().value;
|
|
|
|
firstView?.destroy();
|
|
this.#buf.delete(firstView);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Simple viewer control to display PDF content/pages.
|
|
*
|
|
* @implements {IPDFAnnotationLayerFactory}
|
|
* @implements {IPDFAnnotationEditorLayerFactory}
|
|
* @implements {IPDFStructTreeLayerFactory}
|
|
* @implements {IPDFTextLayerFactory}
|
|
* @implements {IPDFXfaLayerFactory}
|
|
*/
|
|
class BaseViewer {
|
|
#buffer = null;
|
|
|
|
#annotationEditorMode = AnnotationEditorType.DISABLE;
|
|
|
|
#annotationEditorUIManager = null;
|
|
|
|
#annotationMode = AnnotationMode.ENABLE_FORMS;
|
|
|
|
#enablePermissions = false;
|
|
|
|
#previousContainerHeight = 0;
|
|
|
|
#scrollModePageState = null;
|
|
|
|
#onVisibilityChange = null;
|
|
|
|
/**
|
|
* @param {PDFViewerOptions} options
|
|
*/
|
|
constructor(options) {
|
|
if (this.constructor === BaseViewer) {
|
|
throw new Error("Cannot initialize BaseViewer.");
|
|
}
|
|
const viewerVersion =
|
|
typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_VERSION") : null;
|
|
if (version !== viewerVersion) {
|
|
throw new Error(
|
|
`The API version "${version}" does not match the Viewer version "${viewerVersion}".`
|
|
);
|
|
}
|
|
this.container = options.container;
|
|
this.viewer = options.viewer || options.container.firstElementChild;
|
|
|
|
if (
|
|
typeof PDFJSDev === "undefined" ||
|
|
PDFJSDev.test("!PRODUCTION || GENERIC")
|
|
) {
|
|
if (
|
|
!(
|
|
this.container?.tagName.toUpperCase() === "DIV" &&
|
|
this.viewer?.tagName.toUpperCase() === "DIV"
|
|
)
|
|
) {
|
|
throw new Error("Invalid `container` and/or `viewer` option.");
|
|
}
|
|
|
|
if (
|
|
this.container.offsetParent &&
|
|
getComputedStyle(this.container).position !== "absolute"
|
|
) {
|
|
throw new Error("The `container` must be absolutely positioned.");
|
|
}
|
|
}
|
|
this.eventBus = options.eventBus;
|
|
this.linkService = options.linkService || new SimpleLinkService();
|
|
this.downloadManager = options.downloadManager || null;
|
|
this.findController = options.findController || null;
|
|
this._scriptingManager = options.scriptingManager || null;
|
|
this.removePageBorders = options.removePageBorders || false;
|
|
this.textLayerMode = options.textLayerMode ?? TextLayerMode.ENABLE;
|
|
this.#annotationMode =
|
|
options.annotationMode ?? AnnotationMode.ENABLE_FORMS;
|
|
this.#annotationEditorMode =
|
|
options.annotationEditorMode ?? AnnotationEditorType.DISABLE;
|
|
this.imageResourcesPath = options.imageResourcesPath || "";
|
|
this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;
|
|
if (
|
|
typeof PDFJSDev === "undefined" ||
|
|
PDFJSDev.test("!PRODUCTION || GENERIC")
|
|
) {
|
|
this.renderer = options.renderer || RendererType.CANVAS;
|
|
}
|
|
this.useOnlyCssZoom = options.useOnlyCssZoom || false;
|
|
this.maxCanvasPixels = options.maxCanvasPixels;
|
|
this.l10n = options.l10n || NullL10n;
|
|
this.#enablePermissions = options.enablePermissions || false;
|
|
this.pageColors = options.pageColors || null;
|
|
|
|
if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
|
|
if (
|
|
this.pageColors &&
|
|
!(
|
|
CSS.supports("color", this.pageColors.background) &&
|
|
CSS.supports("color", this.pageColors.foreground)
|
|
)
|
|
) {
|
|
if (this.pageColors.background || this.pageColors.foreground) {
|
|
console.warn(
|
|
"BaseViewer: Ignoring `pageColors`-option, since the browser doesn't support the values used."
|
|
);
|
|
}
|
|
this.pageColors = null;
|
|
}
|
|
}
|
|
|
|
this.defaultRenderingQueue = !options.renderingQueue;
|
|
if (this.defaultRenderingQueue) {
|
|
// Custom rendering queue is not specified, using default one
|
|
this.renderingQueue = new PDFRenderingQueue();
|
|
this.renderingQueue.setViewer(this);
|
|
} else {
|
|
this.renderingQueue = options.renderingQueue;
|
|
}
|
|
|
|
this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));
|
|
this.presentationModeState = PresentationModeState.UNKNOWN;
|
|
this._onBeforeDraw = this._onAfterDraw = null;
|
|
this._resetView();
|
|
|
|
if (this.removePageBorders) {
|
|
this.viewer.classList.add("removePageBorders");
|
|
}
|
|
this.updateContainerHeightCss();
|
|
}
|
|
|
|
get pagesCount() {
|
|
return this._pages.length;
|
|
}
|
|
|
|
getPageView(index) {
|
|
return this._pages[index];
|
|
}
|
|
|
|
/**
|
|
* @type {boolean} - True if all {PDFPageView} objects are initialized.
|
|
*/
|
|
get pageViewsReady() {
|
|
if (!this._pagesCapability.settled) {
|
|
return false;
|
|
}
|
|
// Prevent printing errors when 'disableAutoFetch' is set, by ensuring
|
|
// that *all* pages have in fact been completely loaded.
|
|
return this._pages.every(function (pageView) {
|
|
return pageView?.pdfPage;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @type {boolean}
|
|
*/
|
|
get renderForms() {
|
|
return this.#annotationMode === AnnotationMode.ENABLE_FORMS;
|
|
}
|
|
|
|
/**
|
|
* @type {boolean}
|
|
*/
|
|
get enableScripting() {
|
|
return !!this._scriptingManager;
|
|
}
|
|
|
|
/**
|
|
* @type {number}
|
|
*/
|
|
get currentPageNumber() {
|
|
return this._currentPageNumber;
|
|
}
|
|
|
|
/**
|
|
* @param {number} val - The page number.
|
|
*/
|
|
set currentPageNumber(val) {
|
|
if (!Number.isInteger(val)) {
|
|
throw new Error("Invalid page number.");
|
|
}
|
|
if (!this.pdfDocument) {
|
|
return;
|
|
}
|
|
// The intent can be to just reset a scroll position and/or scale.
|
|
if (!this._setCurrentPageNumber(val, /* resetCurrentPageView = */ true)) {
|
|
console.error(`currentPageNumber: "${val}" is not a valid page.`);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @returns {boolean} Whether the pageNumber is valid (within bounds).
|
|
* @private
|
|
*/
|
|
_setCurrentPageNumber(val, resetCurrentPageView = false) {
|
|
if (this._currentPageNumber === val) {
|
|
if (resetCurrentPageView) {
|
|
this.#resetCurrentPageView();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (!(0 < val && val <= this.pagesCount)) {
|
|
return false;
|
|
}
|
|
const previous = this._currentPageNumber;
|
|
this._currentPageNumber = val;
|
|
|
|
this.eventBus.dispatch("pagechanging", {
|
|
source: this,
|
|
pageNumber: val,
|
|
pageLabel: this._pageLabels?.[val - 1] ?? null,
|
|
previous,
|
|
});
|
|
|
|
if (resetCurrentPageView) {
|
|
this.#resetCurrentPageView();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @type {string|null} Returns the current page label, or `null` if no page
|
|
* labels exist.
|
|
*/
|
|
get currentPageLabel() {
|
|
return this._pageLabels?.[this._currentPageNumber - 1] ?? null;
|
|
}
|
|
|
|
/**
|
|
* @param {string} val - The page label.
|
|
*/
|
|
set currentPageLabel(val) {
|
|
if (!this.pdfDocument) {
|
|
return;
|
|
}
|
|
let page = val | 0; // Fallback page number.
|
|
if (this._pageLabels) {
|
|
const i = this._pageLabels.indexOf(val);
|
|
if (i >= 0) {
|
|
page = i + 1;
|
|
}
|
|
}
|
|
// The intent can be to just reset a scroll position and/or scale.
|
|
if (!this._setCurrentPageNumber(page, /* resetCurrentPageView = */ true)) {
|
|
console.error(`currentPageLabel: "${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, 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, 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;
|
|
|
|
const updateArgs = { rotation };
|
|
for (const pageView of this._pages) {
|
|
pageView.update(updateArgs);
|
|
}
|
|
// 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, 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;
|
|
}
|
|
|
|
/**
|
|
* 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.viewer.classList.add(ENABLE_PERMISSIONS_CLASS);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#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 Promise.resolve();
|
|
}
|
|
|
|
// 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.removeEventListener(
|
|
"visibilitychange",
|
|
this.#onVisibilityChange
|
|
);
|
|
this.#onVisibilityChange = null;
|
|
};
|
|
document.addEventListener("visibilitychange", this.#onVisibilityChange);
|
|
});
|
|
|
|
return Promise.race([
|
|
this._onePageRenderedCapability.promise,
|
|
visibilityChangePromise,
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* @param {PDFDocumentProxy} pdfDocument
|
|
*/
|
|
setDocument(pdfDocument) {
|
|
if (this.pdfDocument) {
|
|
this.eventBus.dispatch("pagesdestroy", { source: this });
|
|
|
|
this._cancelRendering();
|
|
this._resetView();
|
|
|
|
if (this.findController) {
|
|
this.findController.setDocument(null);
|
|
}
|
|
if (this._scriptingManager) {
|
|
this._scriptingManager.setDocument(null);
|
|
}
|
|
if (this.#annotationEditorUIManager) {
|
|
this.#annotationEditorUIManager.destroy();
|
|
this.#annotationEditorUIManager = null;
|
|
}
|
|
}
|
|
|
|
this.pdfDocument = pdfDocument;
|
|
if (!pdfDocument) {
|
|
return;
|
|
}
|
|
const isPureXfa = pdfDocument.isPureXfa;
|
|
const pagesCount = pdfDocument.numPages;
|
|
const firstPagePromise = pdfDocument.getPage(1);
|
|
// Rendering (potentially) depends on this, hence fetching it immediately.
|
|
const optionalContentConfigPromise = pdfDocument.getOptionalContentConfig();
|
|
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 || this._onePageRenderedCapability.settled) {
|
|
return;
|
|
}
|
|
this._onePageRenderedCapability.resolve({ timestamp: evt.timestamp });
|
|
|
|
this.eventBus._off("pagerendered", this._onAfterDraw);
|
|
this._onAfterDraw = null;
|
|
|
|
if (this.#onVisibilityChange) {
|
|
document.removeEventListener(
|
|
"visibilitychange",
|
|
this.#onVisibilityChange
|
|
);
|
|
this.#onVisibilityChange = 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 (annotationEditorMode !== AnnotationEditorType.DISABLE) {
|
|
const mode = annotationEditorMode;
|
|
|
|
if (isPureXfa) {
|
|
console.warn("Warning: XFA-editing is not implemented.");
|
|
} else if (isValidAnnotationEditorMode(mode)) {
|
|
this.#annotationEditorUIManager = new AnnotationEditorUIManager(
|
|
this.container,
|
|
this.eventBus
|
|
);
|
|
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,
|
|
});
|
|
const textLayerFactory =
|
|
textLayerMode !== TextLayerMode.DISABLE && !isPureXfa ? this : null;
|
|
const annotationLayerFactory =
|
|
annotationMode !== AnnotationMode.DISABLE ? this : null;
|
|
const xfaLayerFactory = isPureXfa ? this : null;
|
|
const annotationEditorLayerFactory = this.#annotationEditorUIManager
|
|
? this
|
|
: null;
|
|
|
|
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,
|
|
textLayerFactory,
|
|
textLayerMode,
|
|
annotationLayerFactory,
|
|
annotationMode,
|
|
xfaLayerFactory,
|
|
annotationEditorLayerFactory,
|
|
textHighlighterFactory: this,
|
|
structTreeLayerFactory: this,
|
|
imageResourcesPath: this.imageResourcesPath,
|
|
renderer:
|
|
typeof PDFJSDev === "undefined" ||
|
|
PDFJSDev.test("!PRODUCTION || GENERIC")
|
|
? this.renderer
|
|
: null,
|
|
useOnlyCssZoom: this.useOnlyCssZoom,
|
|
maxCanvasPixels: this.maxCanvasPixels,
|
|
pageColors: this.pageColors,
|
|
l10n: this.l10n,
|
|
});
|
|
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 () => {
|
|
if (this.findController) {
|
|
this.findController.setDocument(pdfDocument); // Enable searching.
|
|
}
|
|
if (this._scriptingManager) {
|
|
this._scriptingManager.setDocument(pdfDocument); // Enable scripting.
|
|
}
|
|
|
|
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 = createPromiseCapability();
|
|
this._onePageRenderedCapability = createPromiseCapability();
|
|
this._pagesCapability = createPromiseCapability();
|
|
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");
|
|
// Reset all PDF document permissions.
|
|
this.viewer.classList.remove(ENABLE_PERMISSIONS_CLASS);
|
|
}
|
|
|
|
#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;
|
|
|
|
if (this._scrollMode === ScrollMode.PAGE) {
|
|
// Ensure that `this._currentPageNumber` is correct.
|
|
this._setCurrentPageNumber(id);
|
|
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
this._currentScaleValue = newValue.toString();
|
|
|
|
if (this.#isSameScale(newScale)) {
|
|
if (preset) {
|
|
this.eventBus.dispatch("scalechanging", {
|
|
source: this,
|
|
scale: newScale,
|
|
presetValue: newValue,
|
|
});
|
|
}
|
|
return;
|
|
}
|
|
|
|
docStyle.setProperty(
|
|
"--scale-factor",
|
|
newScale * PixelsPerInch.PDF_TO_CSS_UNITS
|
|
);
|
|
|
|
const updateArgs = { scale: newScale };
|
|
for (const pageView of this._pages) {
|
|
pageView.update(updateArgs);
|
|
}
|
|
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();
|
|
}
|
|
this.updateContainerHeightCss();
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
get _pageWidthScaleFactor() {
|
|
if (
|
|
this._spreadMode !== SpreadMode.NONE &&
|
|
this._scrollMode !== ScrollMode.HORIZONTAL
|
|
) {
|
|
return 2;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
_setScale(value, noScroll = false) {
|
|
let scale = parseFloat(value);
|
|
|
|
if (scale > 0) {
|
|
this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ false);
|
|
} else {
|
|
const currentPage = this._pages[this._currentPageNumber - 1];
|
|
if (!currentPage) {
|
|
return;
|
|
}
|
|
let hPadding = SCROLLBAR_PADDING,
|
|
vPadding = VERTICAL_PADDING;
|
|
|
|
if (this.isInPresentationMode) {
|
|
hPadding = vPadding = 4;
|
|
} else if (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;
|
|
}
|
|
this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ true);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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, 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;
|
|
const hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;
|
|
const vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;
|
|
|
|
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,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @param {number} pageNumber
|
|
*/
|
|
isPageVisible(pageNumber) {
|
|
if (!this.pdfDocument) {
|
|
return false;
|
|
}
|
|
if (
|
|
!(
|
|
Number.isInteger(pageNumber) &&
|
|
pageNumber > 0 &&
|
|
pageNumber <= this.pagesCount
|
|
)
|
|
) {
|
|
console.error(`isPageVisible: "${pageNumber}" is not a valid page.`);
|
|
return false;
|
|
}
|
|
return this._getVisiblePages().ids.has(pageNumber);
|
|
}
|
|
|
|
/**
|
|
* @param {number} pageNumber
|
|
*/
|
|
isPageCached(pageNumber) {
|
|
if (!this.pdfDocument) {
|
|
return false;
|
|
}
|
|
if (
|
|
!(
|
|
Number.isInteger(pageNumber) &&
|
|
pageNumber > 0 &&
|
|
pageNumber <= this.pagesCount
|
|
)
|
|
) {
|
|
console.error(`isPageCached: "${pageNumber}" is not a valid page.`);
|
|
return false;
|
|
}
|
|
const pageView = this._pages[pageNumber - 1];
|
|
return this.#buffer.has(pageView);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Only show the `loadingIcon`-spinner on visible pages (see issue 14242).
|
|
*/
|
|
#toggleLoadingIconSpinner(visibleIds) {
|
|
for (const id of visibleIds) {
|
|
const pageView = this._pages[id - 1];
|
|
pageView?.toggleLoadingIconSpinner(/* viewVisible = */ true);
|
|
}
|
|
for (const pageView of this.#buffer) {
|
|
if (visibleIds.has(pageView.id)) {
|
|
// Handled above, since the "buffer" may not contain all visible pages.
|
|
continue;
|
|
}
|
|
pageView.toggleLoadingIconSpinner(/* viewVisible = */ false);
|
|
}
|
|
}
|
|
|
|
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
|
|
);
|
|
this.#toggleLoadingIconSpinner(visiblePages.ids);
|
|
|
|
if (pageView) {
|
|
this.#ensurePdfPageLoaded(pageView).then(() => {
|
|
this.renderingQueue.renderView(pageView);
|
|
});
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateTextLayerBuilderParameters
|
|
* @property {HTMLDivElement} textLayerDiv
|
|
* @property {number} pageIndex
|
|
* @property {PageViewport} viewport
|
|
* @property {EventBus} eventBus
|
|
* @property {TextHighlighter} highlighter
|
|
* @property {TextAccessibilityManager} [accessibilityManager]
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateTextLayerBuilderParameters}
|
|
* @returns {TextLayerBuilder}
|
|
*/
|
|
createTextLayerBuilder({
|
|
textLayerDiv,
|
|
pageIndex,
|
|
viewport,
|
|
eventBus,
|
|
highlighter,
|
|
accessibilityManager = null,
|
|
}) {
|
|
return new TextLayerBuilder({
|
|
textLayerDiv,
|
|
eventBus,
|
|
pageIndex,
|
|
viewport,
|
|
highlighter,
|
|
accessibilityManager,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateTextHighlighterParameters
|
|
* @property {number} pageIndex
|
|
* @property {EventBus} eventBus
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateTextHighlighterParameters}
|
|
* @returns {TextHighlighter}
|
|
*/
|
|
createTextHighlighter({ pageIndex, eventBus }) {
|
|
return new TextHighlighter({
|
|
eventBus,
|
|
pageIndex,
|
|
findController: this.isInPresentationMode ? null : this.findController,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateAnnotationLayerBuilderParameters
|
|
* @property {HTMLDivElement} pageDiv
|
|
* @property {PDFPageProxy} pdfPage
|
|
* @property {AnnotationStorage} [annotationStorage] - Storage for annotation
|
|
* data in forms.
|
|
* @property {string} [imageResourcesPath] - Path for image resources, mainly
|
|
* for annotation icons. Include trailing slash.
|
|
* @property {boolean} renderForms
|
|
* @property {IL10n} l10n
|
|
* @property {boolean} [enableScripting]
|
|
* @property {Promise<boolean>} [hasJSActionsPromise]
|
|
* @property {Object} [mouseState]
|
|
* @property {Promise<Object<string, Array<Object>> | null>}
|
|
* [fieldObjectsPromise]
|
|
* @property {Map<string, HTMLCanvasElement>} [annotationCanvasMap] - Map some
|
|
* annotation ids with canvases used to render them.
|
|
* @property {TextAccessibilityManager} [accessibilityManager]
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateAnnotationLayerBuilderParameters}
|
|
* @returns {AnnotationLayerBuilder}
|
|
*/
|
|
createAnnotationLayerBuilder({
|
|
pageDiv,
|
|
pdfPage,
|
|
annotationStorage = this.pdfDocument?.annotationStorage,
|
|
imageResourcesPath = "",
|
|
renderForms = true,
|
|
l10n = NullL10n,
|
|
enableScripting = this.enableScripting,
|
|
hasJSActionsPromise = this.pdfDocument?.hasJSActions(),
|
|
mouseState = this._scriptingManager?.mouseState,
|
|
fieldObjectsPromise = this.pdfDocument?.getFieldObjects(),
|
|
annotationCanvasMap = null,
|
|
accessibilityManager = null,
|
|
}) {
|
|
return new AnnotationLayerBuilder({
|
|
pageDiv,
|
|
pdfPage,
|
|
annotationStorage,
|
|
imageResourcesPath,
|
|
renderForms,
|
|
linkService: this.linkService,
|
|
downloadManager: this.downloadManager,
|
|
l10n,
|
|
enableScripting,
|
|
hasJSActionsPromise,
|
|
mouseState,
|
|
fieldObjectsPromise,
|
|
annotationCanvasMap,
|
|
accessibilityManager,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateAnnotationEditorLayerBuilderParameters
|
|
* @property {AnnotationEditorUIManager} [uiManager]
|
|
* @property {HTMLDivElement} pageDiv
|
|
* @property {PDFPageProxy} pdfPage
|
|
* @property {IL10n} l10n
|
|
* @property {AnnotationStorage} [annotationStorage] - Storage for annotation
|
|
* @property {TextAccessibilityManager} [accessibilityManager]
|
|
* data in forms.
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateAnnotationEditorLayerBuilderParameters}
|
|
* @returns {AnnotationEditorLayerBuilder}
|
|
*/
|
|
createAnnotationEditorLayerBuilder({
|
|
uiManager = this.#annotationEditorUIManager,
|
|
pageDiv,
|
|
pdfPage,
|
|
accessibilityManager = null,
|
|
l10n,
|
|
annotationStorage = this.pdfDocument?.annotationStorage,
|
|
}) {
|
|
return new AnnotationEditorLayerBuilder({
|
|
uiManager,
|
|
pageDiv,
|
|
pdfPage,
|
|
annotationStorage,
|
|
accessibilityManager,
|
|
l10n,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateXfaLayerBuilderParameters
|
|
* @property {HTMLDivElement} pageDiv
|
|
* @property {PDFPageProxy} pdfPage
|
|
* @property {AnnotationStorage} [annotationStorage] - Storage for annotation
|
|
* data in forms.
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateXfaLayerBuilderParameters}
|
|
* @returns {XfaLayerBuilder}
|
|
*/
|
|
createXfaLayerBuilder({
|
|
pageDiv,
|
|
pdfPage,
|
|
annotationStorage = this.pdfDocument?.annotationStorage,
|
|
}) {
|
|
return new XfaLayerBuilder({
|
|
pageDiv,
|
|
pdfPage,
|
|
annotationStorage,
|
|
linkService: this.linkService,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} CreateStructTreeLayerBuilderParameters
|
|
* @property {PDFPageProxy} pdfPage
|
|
*/
|
|
|
|
/**
|
|
* @param {CreateStructTreeLayerBuilderParameters}
|
|
* @returns {StructTreeLayerBuilder}
|
|
*/
|
|
createStructTreeLayerBuilder({ pdfPage }) {
|
|
return new StructTreeLayerBuilder({
|
|
pdfPage,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @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() {
|
|
return this._pages.map(pageView => {
|
|
const viewport = pageView.pdfPage.getViewport({ scale: 1 });
|
|
|
|
if (!this.enablePrintAutoRotate || isPortraitOrientation(viewport)) {
|
|
return {
|
|
width: viewport.width,
|
|
height: viewport.height,
|
|
rotation: viewport.rotation,
|
|
};
|
|
}
|
|
// Landscape orientation.
|
|
return {
|
|
width: viewport.height,
|
|
height: viewport.width,
|
|
rotation: (viewport.rotation - 90) % 360,
|
|
};
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @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();
|
|
}
|
|
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;
|
|
|
|
const updateArgs = { optionalContentConfigPromise: promise };
|
|
for (const pageView of this._pages) {
|
|
pageView.update(updateArgs);
|
|
}
|
|
this.update();
|
|
|
|
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 (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, 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 (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, 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 occured.
|
|
*/
|
|
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 occured.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Increase the current zoom level one, or more, times.
|
|
* @param {number} [steps] - Defaults to zooming once.
|
|
*/
|
|
increaseScale(steps = 1) {
|
|
let newScale = this._currentScale;
|
|
do {
|
|
newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
|
|
newScale = Math.ceil(newScale * 10) / 10;
|
|
newScale = Math.min(MAX_SCALE, newScale);
|
|
} while (--steps > 0 && newScale < MAX_SCALE);
|
|
this.currentScaleValue = newScale;
|
|
}
|
|
|
|
/**
|
|
* Decrease the current zoom level one, or more, times.
|
|
* @param {number} [steps] - Defaults to zooming once.
|
|
*/
|
|
decreaseScale(steps = 1) {
|
|
let newScale = this._currentScale;
|
|
do {
|
|
newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
|
|
newScale = Math.floor(newScale * 10) / 10;
|
|
newScale = Math.max(MIN_SCALE, newScale);
|
|
} while (--steps > 0 && newScale > MIN_SCALE);
|
|
this.currentScaleValue = newScale;
|
|
}
|
|
|
|
updateContainerHeightCss() {
|
|
const height = this.container.clientHeight;
|
|
|
|
if (height !== this.#previousContainerHeight) {
|
|
this.#previousContainerHeight = height;
|
|
|
|
docStyle.setProperty("--viewer-container-height", `${height}px`);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @type {number}
|
|
*/
|
|
get annotationEditorMode() {
|
|
return this.#annotationEditorUIManager
|
|
? this.#annotationEditorMode
|
|
: AnnotationEditorType.DISABLE;
|
|
}
|
|
|
|
/**
|
|
* @param {number} mode - AnnotationEditor mode (None, FreeText, Ink, ...)
|
|
*/
|
|
set annotationEditorMode(mode) {
|
|
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);
|
|
}
|
|
|
|
// 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() {
|
|
if (!this.pdfDocument) {
|
|
return;
|
|
}
|
|
const updateArgs = {};
|
|
for (const pageView of this._pages) {
|
|
pageView.update(updateArgs);
|
|
}
|
|
this.update();
|
|
}
|
|
}
|
|
|
|
export { BaseViewer, PagesCountLimit, PDFPageViewBuffer };
|