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app.js
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app.js
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/* Copyright 2012 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.
*/
/* globals PDFBug, Stats */
import {
animationStarted, DEFAULT_SCALE_VALUE, getPDFFileNameFromURL, isFileSchema,
isValidRotation, MAX_SCALE, MIN_SCALE, noContextMenuHandler,
normalizeWheelEventDelta, parseQueryString, PresentationModeState,
ProgressBar, RendererType
} from './ui_utils';
import {
build, createBlob, getDocument, getFilenameFromUrl, InvalidPDFException,
MissingPDFException, OPS, PDFJS, shadow, UnexpectedResponseException,
UNSUPPORTED_FEATURES, version
} from 'pdfjs-lib';
import { CursorTool, PDFCursorTools } from './pdf_cursor_tools';
import { PDFRenderingQueue, RenderingStates } from './pdf_rendering_queue';
import { PDFSidebar, SidebarView } from './pdf_sidebar';
import { getGlobalEventBus } from './dom_events';
import { OverlayManager } from './overlay_manager';
import { PasswordPrompt } from './password_prompt';
import { PDFAttachmentViewer } from './pdf_attachment_viewer';
import { PDFDocumentProperties } from './pdf_document_properties';
import { PDFFindBar } from './pdf_find_bar';
import { PDFFindController } from './pdf_find_controller';
import { PDFHistory } from './pdf_history';
import { PDFLinkService } from './pdf_link_service';
import { PDFOutlineViewer } from './pdf_outline_viewer';
import { PDFPresentationMode } from './pdf_presentation_mode';
import { PDFSidebarResizer } from './pdf_sidebar_resizer';
import { PDFThumbnailViewer } from './pdf_thumbnail_viewer';
import { PDFViewer } from './pdf_viewer';
import { SecondaryToolbar } from './secondary_toolbar';
import { Toolbar } from './toolbar';
import { ViewHistory } from './view_history';
const DEFAULT_SCALE_DELTA = 1.1;
const DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT = 5000;
function configure(PDFJS) {
PDFJS.imageResourcesPath = './images/';
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL || GENERIC || CHROME')) {
PDFJS.workerSrc = '../build/pdf.worker.js';
}
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
PDFJS.cMapUrl = '../external/bcmaps/';
PDFJS.workerSrc = '../src/worker_loader.js';
} else {
PDFJS.cMapUrl = '../web/cmaps/';
}
PDFJS.cMapPacked = true;
}
const DefaultExternalServices = {
updateFindControlState(data) {},
initPassiveLoading(callbacks) {},
fallback(data, callback) {},
reportTelemetry(data) {},
createDownloadManager() {
throw new Error('Not implemented: createDownloadManager');
},
createPreferences() {
throw new Error('Not implemented: createPreferences');
},
createL10n() {
throw new Error('Not implemented: createL10n');
},
supportsIntegratedFind: false,
supportsDocumentFonts: true,
supportsDocumentColors: true,
supportedMouseWheelZoomModifierKeys: {
ctrlKey: true,
metaKey: true,
},
};
let PDFViewerApplication = {
initialBookmark: document.location.hash.substring(1),
initialized: false,
fellback: false,
appConfig: null,
pdfDocument: null,
pdfLoadingTask: null,
printService: null,
/** @type {PDFViewer} */
pdfViewer: null,
/** @type {PDFThumbnailViewer} */
pdfThumbnailViewer: null,
/** @type {PDFRenderingQueue} */
pdfRenderingQueue: null,
/** @type {PDFPresentationMode} */
pdfPresentationMode: null,
/** @type {PDFDocumentProperties} */
pdfDocumentProperties: null,
/** @type {PDFLinkService} */
pdfLinkService: null,
/** @type {PDFHistory} */
pdfHistory: null,
/** @type {PDFSidebar} */
pdfSidebar: null,
/** @type {PDFSidebarResizer} */
pdfSidebarResizer: null,
/** @type {PDFOutlineViewer} */
pdfOutlineViewer: null,
/** @type {PDFAttachmentViewer} */
pdfAttachmentViewer: null,
/** @type {PDFCursorTools} */
pdfCursorTools: null,
/** @type {ViewHistory} */
store: null,
/** @type {DownloadManager} */
downloadManager: null,
/** @type {OverlayManager} */
overlayManager: null,
/** @type {Preferences} */
preferences: null,
/** @type {Toolbar} */
toolbar: null,
/** @type {SecondaryToolbar} */
secondaryToolbar: null,
/** @type {EventBus} */
eventBus: null,
/** @type {IL10n} */
l10n: null,
isInitialViewSet: false,
downloadComplete: false,
viewerPrefs: {
sidebarViewOnLoad: SidebarView.NONE,
pdfBugEnabled: false,
showPreviousViewOnLoad: true,
defaultZoomValue: '',
disablePageMode: false,
disablePageLabels: false,
renderer: 'canvas',
enhanceTextSelection: false,
renderInteractiveForms: false,
enablePrintAutoRotate: false,
},
isViewerEmbedded: (window.parent !== window),
url: '',
baseUrl: '',
externalServices: DefaultExternalServices,
_boundEvents: {},
contentDispositionFilename: null,
// Called once when the document is loaded.
initialize(appConfig) {
this.preferences = this.externalServices.createPreferences();
configure(PDFJS);
this.appConfig = appConfig;
return this._readPreferences().then(() => {
return this._parseHashParameters();
}).then(() => {
return this._initializeL10n();
}).then(() => {
return this._initializeViewerComponents();
}).then(() => {
// Bind the various event handlers *after* the viewer has been
// initialized, to prevent errors if an event arrives too soon.
this.bindEvents();
this.bindWindowEvents();
// We can start UI localization now.
let appContainer = appConfig.appContainer || document.documentElement;
this.l10n.translate(appContainer).then(() => {
// Dispatch the 'localized' event on the `eventBus` once the viewer
// has been fully initialized and translated.
this.eventBus.dispatch('localized');
});
if (this.isViewerEmbedded && !PDFJS.isExternalLinkTargetSet()) {
// Prevent external links from "replacing" the viewer,
// when it's embedded in e.g. an iframe or an object.
PDFJS.externalLinkTarget = PDFJS.LinkTarget.TOP;
}
this.initialized = true;
});
},
/**
* @private
*/
_readPreferences() {
let { preferences, viewerPrefs, } = this;
return Promise.all([
preferences.get('enableWebGL').then(function resolved(value) {
PDFJS.disableWebGL = !value;
}),
preferences.get('sidebarViewOnLoad').then(function resolved(value) {
viewerPrefs['sidebarViewOnLoad'] = value;
}),
preferences.get('pdfBugEnabled').then(function resolved(value) {
viewerPrefs['pdfBugEnabled'] = value;
}),
preferences.get('showPreviousViewOnLoad').then(function resolved(value) {
viewerPrefs['showPreviousViewOnLoad'] = value;
}),
preferences.get('defaultZoomValue').then(function resolved(value) {
viewerPrefs['defaultZoomValue'] = value;
}),
preferences.get('enhanceTextSelection').then(function resolved(value) {
viewerPrefs['enhanceTextSelection'] = value;
}),
preferences.get('disableTextLayer').then(function resolved(value) {
if (PDFJS.disableTextLayer === true) {
return;
}
PDFJS.disableTextLayer = value;
}),
preferences.get('disableRange').then(function resolved(value) {
if (PDFJS.disableRange === true) {
return;
}
PDFJS.disableRange = value;
}),
preferences.get('disableStream').then(function resolved(value) {
if (PDFJS.disableStream === true) {
return;
}
PDFJS.disableStream = value;
}),
preferences.get('disableAutoFetch').then(function resolved(value) {
PDFJS.disableAutoFetch = value;
}),
preferences.get('disableFontFace').then(function resolved(value) {
if (PDFJS.disableFontFace === true) {
return;
}
PDFJS.disableFontFace = value;
}),
preferences.get('useOnlyCssZoom').then(function resolved(value) {
PDFJS.useOnlyCssZoom = value;
}),
preferences.get('externalLinkTarget').then(function resolved(value) {
if (PDFJS.isExternalLinkTargetSet()) {
return;
}
PDFJS.externalLinkTarget = value;
}),
preferences.get('renderer').then(function resolved(value) {
viewerPrefs['renderer'] = value;
}),
preferences.get('renderInteractiveForms').then(function resolved(value) {
viewerPrefs['renderInteractiveForms'] = value;
}),
preferences.get('disablePageMode').then(function resolved(value) {
viewerPrefs['disablePageMode'] = value;
}),
preferences.get('disablePageLabels').then(function resolved(value) {
viewerPrefs['disablePageLabels'] = value;
}),
preferences.get('enablePrintAutoRotate').then(function resolved(value) {
viewerPrefs['enablePrintAutoRotate'] = value;
}),
]).catch(function(reason) { });
},
/**
* @private
*/
_parseHashParameters() {
let { appConfig, viewerPrefs, } = this;
let waitOn = [];
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION') ||
viewerPrefs['pdfBugEnabled']) {
// Special debugging flags in the hash section of the URL.
let hash = document.location.hash.substring(1);
let hashParams = parseQueryString(hash);
if ('disableworker' in hashParams) {
PDFJS.disableWorker = (hashParams['disableworker'] === 'true');
}
if ('disablerange' in hashParams) {
PDFJS.disableRange = (hashParams['disablerange'] === 'true');
}
if ('disablestream' in hashParams) {
PDFJS.disableStream = (hashParams['disablestream'] === 'true');
}
if ('disableautofetch' in hashParams) {
PDFJS.disableAutoFetch = (hashParams['disableautofetch'] === 'true');
}
if ('disablefontface' in hashParams) {
PDFJS.disableFontFace = (hashParams['disablefontface'] === 'true');
}
if ('disablehistory' in hashParams) {
PDFJS.disableHistory = (hashParams['disablehistory'] === 'true');
}
if ('webgl' in hashParams) {
PDFJS.disableWebGL = (hashParams['webgl'] !== 'true');
}
if ('useonlycsszoom' in hashParams) {
PDFJS.useOnlyCssZoom = (hashParams['useonlycsszoom'] === 'true');
}
if ('verbosity' in hashParams) {
PDFJS.verbosity = hashParams['verbosity'] | 0;
}
if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) &&
hashParams['disablebcmaps'] === 'true') {
PDFJS.cMapUrl = '../external/cmaps/';
PDFJS.cMapPacked = false;
}
if ('textlayer' in hashParams) {
switch (hashParams['textlayer']) {
case 'off':
PDFJS.disableTextLayer = true;
break;
case 'visible':
case 'shadow':
case 'hover':
let viewer = appConfig.viewerContainer;
viewer.classList.add('textLayer-' + hashParams['textlayer']);
break;
}
}
if ('pdfbug' in hashParams) {
PDFJS.pdfBug = true;
let pdfBug = hashParams['pdfbug'];
let enabled = pdfBug.split(',');
waitOn.push(loadAndEnablePDFBug(enabled));
}
// Locale can be changed only when special debugging flags is present in
// the hash section of the URL, or development version of viewer is used.
// It is not possible to change locale for Firefox extension builds.
if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION') ||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) && 'locale' in hashParams) {
PDFJS.locale = hashParams['locale'];
}
}
return Promise.all(waitOn);
},
/**
* @private
*/
_initializeL10n() {
this.l10n = this.externalServices.createL10n();
return this.l10n.getDirection().then((dir) => {
document.getElementsByTagName('html')[0].dir = dir;
});
},
/**
* @private
*/
_initializeViewerComponents() {
let { appConfig, viewerPrefs, } = this;
return new Promise((resolve, reject) => {
this.overlayManager = new OverlayManager();
let eventBus = appConfig.eventBus || getGlobalEventBus();
this.eventBus = eventBus;
let pdfRenderingQueue = new PDFRenderingQueue();
pdfRenderingQueue.onIdle = this.cleanup.bind(this);
this.pdfRenderingQueue = pdfRenderingQueue;
let pdfLinkService = new PDFLinkService({
eventBus,
});
this.pdfLinkService = pdfLinkService;
let downloadManager = this.externalServices.createDownloadManager();
this.downloadManager = downloadManager;
let container = appConfig.mainContainer;
let viewer = appConfig.viewerContainer;
this.pdfViewer = new PDFViewer({
container,
viewer,
eventBus,
renderingQueue: pdfRenderingQueue,
linkService: pdfLinkService,
downloadManager,
renderer: viewerPrefs['renderer'],
l10n: this.l10n,
enhanceTextSelection: viewerPrefs['enhanceTextSelection'],
renderInteractiveForms: viewerPrefs['renderInteractiveForms'],
enablePrintAutoRotate: viewerPrefs['enablePrintAutoRotate'],
});
pdfRenderingQueue.setViewer(this.pdfViewer);
pdfLinkService.setViewer(this.pdfViewer);
let thumbnailContainer = appConfig.sidebar.thumbnailView;
this.pdfThumbnailViewer = new PDFThumbnailViewer({
container: thumbnailContainer,
renderingQueue: pdfRenderingQueue,
linkService: pdfLinkService,
l10n: this.l10n,
});
pdfRenderingQueue.setThumbnailViewer(this.pdfThumbnailViewer);
this.pdfHistory = new PDFHistory({
linkService: pdfLinkService,
eventBus,
});
pdfLinkService.setHistory(this.pdfHistory);
this.findController = new PDFFindController({
pdfViewer: this.pdfViewer,
});
this.findController.onUpdateResultsCount = (matchCount) => {
if (this.supportsIntegratedFind) {
return;
}
this.findBar.updateResultsCount(matchCount);
};
this.findController.onUpdateState = (state, previous, matchCount) => {
if (this.supportsIntegratedFind) {
this.externalServices.updateFindControlState({
result: state,
findPrevious: previous,
});
} else {
this.findBar.updateUIState(state, previous, matchCount);
}
};
this.pdfViewer.setFindController(this.findController);
// TODO: improve `PDFFindBar` constructor parameter passing
let findBarConfig = Object.create(appConfig.findBar);
findBarConfig.findController = this.findController;
findBarConfig.eventBus = eventBus;
this.findBar = new PDFFindBar(findBarConfig, this.l10n);
this.pdfDocumentProperties =
new PDFDocumentProperties(appConfig.documentProperties,
this.overlayManager, this.l10n);
this.pdfCursorTools = new PDFCursorTools({
container,
eventBus,
preferences: this.preferences,
});
this.toolbar = new Toolbar(appConfig.toolbar, container, eventBus,
this.l10n);
this.secondaryToolbar =
new SecondaryToolbar(appConfig.secondaryToolbar, container, eventBus);
if (this.supportsFullscreen) {
this.pdfPresentationMode = new PDFPresentationMode({
container,
viewer,
pdfViewer: this.pdfViewer,
eventBus,
contextMenuItems: appConfig.fullscreen,
});
}
this.passwordPrompt = new PasswordPrompt(appConfig.passwordOverlay,
this.overlayManager, this.l10n);
this.pdfOutlineViewer = new PDFOutlineViewer({
container: appConfig.sidebar.outlineView,
eventBus,
linkService: pdfLinkService,
});
this.pdfAttachmentViewer = new PDFAttachmentViewer({
container: appConfig.sidebar.attachmentsView,
eventBus,
downloadManager,
});
// TODO: improve `PDFSidebar` constructor parameter passing
let sidebarConfig = Object.create(appConfig.sidebar);
sidebarConfig.pdfViewer = this.pdfViewer;
sidebarConfig.pdfThumbnailViewer = this.pdfThumbnailViewer;
sidebarConfig.pdfOutlineViewer = this.pdfOutlineViewer;
sidebarConfig.eventBus = eventBus;
this.pdfSidebar = new PDFSidebar(sidebarConfig, this.l10n);
this.pdfSidebar.onToggled = this.forceRendering.bind(this);
this.pdfSidebarResizer = new PDFSidebarResizer(appConfig.sidebarResizer,
eventBus, this.l10n);
resolve(undefined);
});
},
run(config) {
this.initialize(config).then(webViewerInitialized);
},
zoomIn(ticks) {
let newScale = this.pdfViewer.currentScale;
do {
newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.ceil(newScale * 10) / 10;
newScale = Math.min(MAX_SCALE, newScale);
} while (--ticks > 0 && newScale < MAX_SCALE);
this.pdfViewer.currentScaleValue = newScale;
},
zoomOut(ticks) {
let newScale = this.pdfViewer.currentScale;
do {
newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.floor(newScale * 10) / 10;
newScale = Math.max(MIN_SCALE, newScale);
} while (--ticks > 0 && newScale > MIN_SCALE);
this.pdfViewer.currentScaleValue = newScale;
},
get pagesCount() {
return this.pdfDocument ? this.pdfDocument.numPages : 0;
},
set page(val) {
this.pdfViewer.currentPageNumber = val;
},
get page() {
return this.pdfViewer.currentPageNumber;
},
get printing() {
return !!this.printService;
},
get supportsPrinting() {
return PDFPrintServiceFactory.instance.supportsPrinting;
},
get supportsFullscreen() {
let support;
if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('MOZCENTRAL')) {
support = document.fullscreenEnabled === true ||
document.mozFullScreenEnabled === true;
} else {
let doc = document.documentElement;
support = !!(doc.requestFullscreen || doc.mozRequestFullScreen ||
doc.webkitRequestFullScreen || doc.msRequestFullscreen);
if (document.fullscreenEnabled === false ||
document.mozFullScreenEnabled === false ||
document.webkitFullscreenEnabled === false ||
document.msFullscreenEnabled === false) {
support = false;
}
}
if (support && PDFJS.disableFullscreen === true) {
support = false;
}
return shadow(this, 'supportsFullscreen', support);
},
get supportsIntegratedFind() {
return this.externalServices.supportsIntegratedFind;
},
get supportsDocumentFonts() {
return this.externalServices.supportsDocumentFonts;
},
get supportsDocumentColors() {
return this.externalServices.supportsDocumentColors;
},
get loadingBar() {
let bar = new ProgressBar('#loadingBar');
return shadow(this, 'loadingBar', bar);
},
get supportedMouseWheelZoomModifierKeys() {
return this.externalServices.supportedMouseWheelZoomModifierKeys;
},
initPassiveLoading() {
if (typeof PDFJSDev === 'undefined' ||
!PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
throw new Error('Not implemented: initPassiveLoading');
}
this.externalServices.initPassiveLoading({
onOpenWithTransport(url, length, transport) {
PDFViewerApplication.open(url, { range: transport, });
if (length) {
PDFViewerApplication.pdfDocumentProperties.setFileSize(length);
}
},
onOpenWithData(data) {
PDFViewerApplication.open(data);
},
onOpenWithURL(url, length, originalURL) {
let file = url, args = null;
if (length !== undefined) {
args = { length, };
}
if (originalURL !== undefined) {
file = { file: url, originalURL, };
}
PDFViewerApplication.open(file, args);
},
onError(err) {
PDFViewerApplication.l10n.get('loading_error', null,
'An error occurred while loading the PDF.').then((msg) => {
PDFViewerApplication.error(msg, err);
});
},
onProgress(loaded, total) {
PDFViewerApplication.progress(loaded / total);
},
});
},
setTitleUsingUrl(url) {
this.url = url;
this.baseUrl = url.split('#')[0];
let title = getPDFFileNameFromURL(url, '');
if (!title) {
try {
title = decodeURIComponent(getFilenameFromUrl(url)) || url;
} catch (ex) {
// decodeURIComponent may throw URIError,
// fall back to using the unprocessed url in that case
title = url;
}
}
this.setTitle(title);
},
setTitle(title) {
if (this.isViewerEmbedded) {
// Embedded PDF viewers should not be changing their parent page's title.
return;
}
document.title = title;
},
/**
* Closes opened PDF document.
* @returns {Promise} - Returns the promise, which is resolved when all
* destruction is completed.
*/
close() {
let errorWrapper = this.appConfig.errorWrapper.container;
errorWrapper.setAttribute('hidden', 'true');
if (!this.pdfLoadingTask) {
return Promise.resolve();
}
let promise = this.pdfLoadingTask.destroy();
this.pdfLoadingTask = null;
if (this.pdfDocument) {
this.pdfDocument = null;
this.pdfThumbnailViewer.setDocument(null);
this.pdfViewer.setDocument(null);
this.pdfLinkService.setDocument(null, null);
this.pdfDocumentProperties.setDocument(null, null);
}
this.store = null;
this.isInitialViewSet = false;
this.downloadComplete = false;
this.url = '';
this.baseUrl = '';
this.contentDispositionFilename = null;
this.pdfSidebar.reset();
this.pdfOutlineViewer.reset();
this.pdfAttachmentViewer.reset();
this.findController.reset();
this.findBar.reset();
this.toolbar.reset();
this.secondaryToolbar.reset();
if (typeof PDFBug !== 'undefined') {
PDFBug.cleanup();
}
return promise;
},
/**
* Opens PDF document specified by URL or array with additional arguments.
* @param {string|TypedArray|ArrayBuffer} file - PDF location or binary data.
* @param {Object} args - (optional) Additional arguments for the getDocument
* call, e.g. HTTP headers ('httpHeaders') or
* alternative data transport ('range').
* @returns {Promise} - Returns the promise, which is resolved when document
* is opened.
*/
open(file, args) {
if (this.pdfLoadingTask) {
// We need to destroy already opened document.
return this.close().then(() => {
// Reload the preferences if a document was previously opened.
this.preferences.reload();
// ... and repeat the open() call.
return this.open(file, args);
});
}
let parameters = Object.create(null);
if (typeof file === 'string') { // URL
this.setTitleUsingUrl(file);
parameters.url = file;
} else if (file && 'byteLength' in file) { // ArrayBuffer
parameters.data = file;
} else if (file.url && file.originalUrl) {
this.setTitleUsingUrl(file.originalUrl);
parameters.url = file.url;
}
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
parameters.docBaseUrl = document.URL.split('#')[0];
} else if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
parameters.docBaseUrl = this.baseUrl;
}
if (args) {
for (let prop in args) {
if (prop === 'length') {
this.pdfDocumentProperties.setFileSize(args[prop]);
}
parameters[prop] = args[prop];
}
}
if (this.url && isFileSchema(this.url)) {
let appConfig = this.appConfig;
appConfig.toolbar.download.setAttribute('hidden', 'true');
appConfig.secondaryToolbar.downloadButton.setAttribute('hidden', 'true');
}
let loadingTask = getDocument(parameters);
this.pdfLoadingTask = loadingTask;
loadingTask.onPassword = (updateCallback, reason) => {
this.passwordPrompt.setUpdateCallback(updateCallback, reason);
this.passwordPrompt.open();
};
loadingTask.onProgress = ({ loaded, total, }) => {
this.progress(loaded / total);
};
// Listen for unsupported features to trigger the fallback UI.
loadingTask.onUnsupportedFeature = this.fallback.bind(this);
return loadingTask.promise.then((pdfDocument) => {
this.load(pdfDocument);
}, (exception) => {
if (loadingTask !== this.pdfLoadingTask) {
return; // Ignore errors for previously opened PDF files.
}
let message = exception && exception.message;
let loadingErrorMessage;
if (exception instanceof InvalidPDFException) {
// change error message also for other builds
loadingErrorMessage = this.l10n.get('invalid_file_error', null,
'Invalid or corrupted PDF file.');
} else if (exception instanceof MissingPDFException) {
// special message for missing PDF's
loadingErrorMessage = this.l10n.get('missing_file_error', null,
'Missing PDF file.');
} else if (exception instanceof UnexpectedResponseException) {
loadingErrorMessage = this.l10n.get('unexpected_response_error', null,
'Unexpected server response.');
} else {
loadingErrorMessage = this.l10n.get('loading_error', null,
'An error occurred while loading the PDF.');
}
return loadingErrorMessage.then((msg) => {
this.error(msg, { message, });
throw new Error(msg);
});
});
},
download() {
function downloadByUrl() {
downloadManager.downloadUrl(url, filename);
}
let url = this.baseUrl;
// Use this.url instead of this.baseUrl to perform filename detection based
// on the reference fragment as ultimate fallback if needed.
let filename = this.contentDispositionFilename ||
getPDFFileNameFromURL(this.url);
let downloadManager = this.downloadManager;
downloadManager.onerror = (err) => {
// This error won't really be helpful because it's likely the
// fallback won't work either (or is already open).
this.error(`PDF failed to download: ${err}`);
};
// When the PDF document isn't ready, or the PDF file is still downloading,
// simply download using the URL.
if (!this.pdfDocument || !this.downloadComplete) {
downloadByUrl();
return;
}
this.pdfDocument.getData().then(function(data) {
let blob = createBlob(data, 'application/pdf');
downloadManager.download(blob, url, filename);
}).catch(downloadByUrl); // Error occurred, try downloading with the URL.
},
fallback(featureId) {
if (typeof PDFJSDev !== 'undefined' &&
PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
// Only trigger the fallback once so we don't spam the user with messages
// for one PDF.
if (this.fellback) {
return;
}
this.fellback = true;
this.externalServices.fallback({
featureId,
url: this.baseUrl,
}, function response(download) {
if (!download) {
return;
}
PDFViewerApplication.download();
});
}
},
/**
* Show the error box.
* @param {String} message A message that is human readable.
* @param {Object} moreInfo (optional) Further information about the error
* that is more technical. Should have a 'message'
* and optionally a 'stack' property.
*/
error(message, moreInfo) {
let moreInfoText = [this.l10n.get('error_version_info',
{ version: version || '?', build: build || '?', },
'PDF.js v{{version}} (build: {{build}})')];
if (moreInfo) {
moreInfoText.push(
this.l10n.get('error_message', { message: moreInfo.message, },
'Message: {{message}}'));
if (moreInfo.stack) {
moreInfoText.push(
this.l10n.get('error_stack', { stack: moreInfo.stack, },
'Stack: {{stack}}'));
} else {
if (moreInfo.filename) {
moreInfoText.push(
this.l10n.get('error_file', { file: moreInfo.filename, },
'File: {{file}}'));
}
if (moreInfo.lineNumber) {
moreInfoText.push(
this.l10n.get('error_line', { line: moreInfo.lineNumber, },
'Line: {{line}}'));
}
}
}
if (typeof PDFJSDev === 'undefined' ||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
let errorWrapperConfig = this.appConfig.errorWrapper;
let errorWrapper = errorWrapperConfig.container;
errorWrapper.removeAttribute('hidden');
let errorMessage = errorWrapperConfig.errorMessage;
errorMessage.textContent = message;
let closeButton = errorWrapperConfig.closeButton;
closeButton.onclick = function() {
errorWrapper.setAttribute('hidden', 'true');
};
let errorMoreInfo = errorWrapperConfig.errorMoreInfo;
let moreInfoButton = errorWrapperConfig.moreInfoButton;
let lessInfoButton = errorWrapperConfig.lessInfoButton;
moreInfoButton.onclick = function() {
errorMoreInfo.removeAttribute('hidden');
moreInfoButton.setAttribute('hidden', 'true');
lessInfoButton.removeAttribute('hidden');
errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px';
};
lessInfoButton.onclick = function() {
errorMoreInfo.setAttribute('hidden', 'true');
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
};
moreInfoButton.oncontextmenu = noContextMenuHandler;
lessInfoButton.oncontextmenu = noContextMenuHandler;
closeButton.oncontextmenu = noContextMenuHandler;
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
Promise.all(moreInfoText).then((parts) => {
errorMoreInfo.value = parts.join('\n');
});
} else {
Promise.all(moreInfoText).then((parts) => {
console.error(message + '\n' + parts.join('\n'));
});
this.fallback();
}
},
progress(level) {
if (this.downloadComplete) {
// Don't accidentally show the loading bar again when the entire file has
// already been fetched (only an issue when disableAutoFetch is enabled).
return;
}
let percent = Math.round(level * 100);
// When we transition from full request to range requests, it's possible
// that we discard some of the loaded data. This can cause the loading
// bar to move backwards. So prevent this by only updating the bar if it
// increases.
if (percent > this.loadingBar.percent || isNaN(percent)) {
this.loadingBar.percent = percent;
// When disableAutoFetch is enabled, it's not uncommon for the entire file
// to never be fetched (depends on e.g. the file structure). In this case
// the loading bar will not be completely filled, nor will it be hidden.
// To prevent displaying a partially filled loading bar permanently, we
// hide it when no data has been loaded during a certain amount of time.
if (PDFJS.disableAutoFetch && percent) {
if (this.disableAutoFetchLoadingBarTimeout) {
clearTimeout(this.disableAutoFetchLoadingBarTimeout);
this.disableAutoFetchLoadingBarTimeout = null;
}
this.loadingBar.show();
this.disableAutoFetchLoadingBarTimeout = setTimeout(() => {
this.loadingBar.hide();
this.disableAutoFetchLoadingBarTimeout = null;
}, DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT);
}
}
},
load(pdfDocument) {
this.pdfDocument = pdfDocument;
pdfDocument.getDownloadInfo().then(() => {
this.downloadComplete = true;
this.loadingBar.hide();
firstPagePromise.then(() => {
this.eventBus.dispatch('documentload', { source: this, });
});
});
// Since the `setInitialView` call below depends on this being resolved,
// fetch it early to avoid delaying initial rendering of the PDF document.
let pageModePromise = pdfDocument.getPageMode().catch(
function() { /* Avoid breaking initial rendering; ignoring errors. */ });
this.toolbar.setPagesCount(pdfDocument.numPages, false);
this.secondaryToolbar.setPagesCount(pdfDocument.numPages);
let id = this.documentFingerprint = pdfDocument.fingerprint;
let store = this.store = new ViewHistory(id);
let baseDocumentUrl;
if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
baseDocumentUrl = null;
} else if (PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
baseDocumentUrl = this.baseUrl;
} else if (PDFJSDev.test('CHROME')) {
baseDocumentUrl = location.href.split('#')[0];
}
this.pdfLinkService.setDocument(pdfDocument, baseDocumentUrl);
this.pdfDocumentProperties.setDocument(pdfDocument, this.url);
let pdfViewer = this.pdfViewer;
pdfViewer.setDocument(pdfDocument);
let firstPagePromise = pdfViewer.firstPagePromise;
let pagesPromise = pdfViewer.pagesPromise;
let onePageRendered = pdfViewer.onePageRendered;
let pdfThumbnailViewer = this.pdfThumbnailViewer;