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- 'use strict';
- PDFJS.getDocument = function getDocument(source) {
- var workerInitializedPromise, workerReadyPromise, transport;
- if (typeof source === 'string') {
- source = { url: source };
- } else if (isArrayBuffer(source)) {
- source = { data: source };
- } else if (typeof source !== 'object') {
- error('Invalid parameter in getDocument, need either Uint8Array, ' +
- 'string or a parameter object');
- }
- if (!source.url && !source.data)
- error('Invalid parameter array, need either .data or .url');
- // copy/use all keys as is except 'url' -- full path is required
- var params = {};
- for (var key in source) {
- if (key === 'url' && typeof window !== 'undefined') {
- params[key] = combineUrl(window.location.href, source[key]);
- continue;
- }
- params[key] = source[key];
- }
- workerInitializedPromise = new PDFJS.Promise();
- workerReadyPromise = new PDFJS.Promise();
- transport = new WorkerTransport(workerInitializedPromise, workerReadyPromise);
- workerInitializedPromise.then(function transportInitialized() {
- transport.fetchDocument(params);
- });
- return workerReadyPromise;
- };
- /**
- * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
- * properties that can be read synchronously.
- */
- var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
- function PDFDocumentProxy(pdfInfo, transport) {
- this.pdfInfo = pdfInfo;
- this.transport = transport;
- }
- PDFDocumentProxy.prototype = {
- /**
- * @return {number} Total number of pages the PDF contains.
- */
- get numPages() {
- return this.pdfInfo.numPages;
- },
- /**
- * @return {string} A unique ID to identify a PDF. Not guaranteed to be
- * unique.
- */
- get fingerprint() {
- return this.pdfInfo.fingerprint;
- },
- /**
- * @return {boolean} true if embedded document fonts are in use. Will be
- * set during rendering of the pages.
- */
- get embeddedFontsUsed() {
- return this.transport.embeddedFontsUsed;
- },
- /**
- * @param {number} The page number to get. The first page is 1.
- * @return {Promise} A promise that is resolved with a {PDFPageProxy}
- * object.
- */
- getPage: function PDFDocumentProxy_getPage(number) {
- return this.transport.getPage(number);
- },
- /**
- * @return {Promise} A promise that is resolved with a lookup table for
- * mapping named destinations to reference numbers.
- */
- getDestinations: function PDFDocumentProxy_getDestinations() {
- var promise = new PDFJS.Promise();
- var destinations = this.pdfInfo.destinations;
- promise.resolve(destinations);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with an {array} that is a
- * tree outline (if it has one) of the PDF. The tree is in the format of:
- * [
- * {
- * title: string,
- * bold: boolean,
- * italic: boolean,
- * color: rgb array,
- * dest: dest obj,
- * items: array of more items like this
- * },
- * ...
- * ].
- */
- getOutline: function PDFDocumentProxy_getOutline() {
- var promise = new PDFJS.Promise();
- var outline = this.pdfInfo.outline;
- promise.resolve(outline);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with an {object} that has
- * info and metadata properties. Info is an {object} filled with anything
- * available in the information dictionary and similarly metadata is a
- * {Metadata} object with information from the metadata section of the PDF.
- */
- getMetadata: function PDFDocumentProxy_getMetadata() {
- var promise = new PDFJS.Promise();
- var info = this.pdfInfo.info;
- var metadata = this.pdfInfo.metadata;
- promise.resolve({
- info: info,
- metadata: metadata ? new PDFJS.Metadata(metadata) : null
- });
- return promise;
- },
- isEncrypted: function PDFDocumentProxy_isEncrypted() {
- var promise = new PDFJS.Promise();
- promise.resolve(this.pdfInfo.encrypted);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with a TypedArray that has
- * the raw data from the PDF.
- */
- getData: function PDFDocumentProxy_getData() {
- var promise = new PDFJS.Promise();
- this.transport.getData(promise);
- return promise;
- },
- destroy: function PDFDocumentProxy_destroy() {
- this.transport.destroy();
- }
- };
- return PDFDocumentProxy;
- })();
- var PDFPageProxy = (function PDFPageProxyClosure() {
- function PDFPageProxy(pageInfo, transport) {
- this.pageInfo = pageInfo;
- this.transport = transport;
- this.stats = new StatTimer();
- this.stats.enabled = !!globalScope.PDFJS.enableStats;
- this.commonObjs = transport.commonObjs;
- this.objs = new PDFObjects();
- this.renderInProgress = false;
- this.cleanupAfterRender = false;
- }
- PDFPageProxy.prototype = {
- /**
- * @return {number} Page number of the page. First page is 1.
- */
- get pageNumber() {
- return this.pageInfo.pageIndex + 1;
- },
- /**
- * @return {number} The number of degrees the page is rotated clockwise.
- */
- get rotate() {
- return this.pageInfo.rotate;
- },
- /**
- * @return {object} The reference that points to this page. It has 'num' and
- * 'gen' properties.
- */
- get ref() {
- return this.pageInfo.ref;
- },
- /**
- * @return {array} An array of the visible portion of the PDF page in the
- * user space units - [x1, y1, x2, y2].
- */
- get view() {
- return this.pageInfo.view;
- },
- /**
- * @param {number} scale The desired scale of the viewport.
- * @param {number} rotate Degrees to rotate the viewport. If omitted this
- * defaults to the page rotation.
- * @return {PageViewport} Contains 'width' and 'height' properties along
- * with transforms required for rendering.
- */
- getViewport: function PDFPageProxy_getViewport(scale, rotate) {
- if (arguments.length < 2)
- rotate = this.rotate;
- return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
- },
- /**
- * @return {Promise} A promise that is resolved with an {array} of the
- * annotation objects.
- */
- getAnnotations: function PDFPageProxy_getAnnotations() {
- if (this.annotationsPromise)
- return this.annotationsPromise;
- var promise = new PDFJS.Promise();
- this.annotationsPromise = promise;
- this.transport.getAnnotations(this.pageInfo.pageIndex);
- return promise;
- },
- /**
- * Begins the process of rendering a page to the desired context.
- * @param {object} params A parameter object that supports:
- * {
- * canvasContext(required): A 2D context of a DOM Canvas object.,
- * textLayer(optional): An object that has beginLayout, endLayout, and
- * appendText functions.,
- * continueCallback(optional): A function that will be called each time
- * the rendering is paused. To continue
- * rendering call the function that is the
- * first argument to the callback.
- * }.
- * @return {Promise} A promise that is resolved when the page finishes
- * rendering.
- */
- render: function PDFPageProxy_render(params) {
- this.renderInProgress = true;
- var promise = new Promise();
- var stats = this.stats;
- stats.time('Overall');
- // If there is no displayReadyPromise yet, then the operatorList was never
- // requested before. Make the request and create the promise.
- if (!this.displayReadyPromise) {
- this.displayReadyPromise = new Promise();
- this.destroyed = false;
- this.stats.time('Page Request');
- this.transport.messageHandler.send('RenderPageRequest', {
- pageIndex: this.pageNumber - 1
- });
- }
- var self = this;
- function complete(error) {
- self.renderInProgress = false;
- if (self.destroyed || self.cleanupAfterRender) {
- delete self.displayReadyPromise;
- delete self.operatorList;
- self.objs.clear();
- }
- if (error)
- promise.reject(error);
- else
- promise.resolve();
- };
- var continueCallback = params.continueCallback;
- // Once the operatorList and fonts are loaded, do the actual rendering.
- this.displayReadyPromise.then(
- function pageDisplayReadyPromise() {
- if (self.destroyed) {
- complete();
- return;
- }
- var gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
- this.objs, params.textLayer);
- try {
- this.display(gfx, params.viewport, complete, continueCallback);
- } catch (e) {
- complete(e);
- }
- }.bind(this),
- function pageDisplayReadPromiseError(reason) {
- complete(reason);
- }
- );
- return promise;
- },
- /**
- * For internal use only.
- */
- startRenderingFromOperatorList:
- function PDFPageProxy_startRenderingFromOperatorList(operatorList,
- fonts) {
- var self = this;
- this.operatorList = operatorList;
- var displayContinuation = function pageDisplayContinuation() {
- // Always defer call to display() to work around bug in
- // Firefox error reporting from XHR callbacks.
- setTimeout(function pageSetTimeout() {
- self.displayReadyPromise.resolve();
- });
- };
- this.ensureFonts(fonts,
- function pageStartRenderingFromOperatorListEnsureFonts() {
- displayContinuation();
- }
- );
- },
- /**
- * For internal use only.
- */
- ensureFonts: function PDFPageProxy_ensureFonts(fonts, callback) {
- this.stats.time('Font Loading');
- // Convert the font names to the corresponding font obj.
- var fontObjs = [];
- for (var i = 0, ii = fonts.length; i < ii; i++) {
- var obj = this.commonObjs.getData(fonts[i]);
- if (obj.error) {
- warn('Error during font loading: ' + obj.error);
- continue;
- }
- if (!obj.coded) {
- this.transport.embeddedFontsUsed = true;
- }
- fontObjs.push(obj);
- }
- // Load all the fonts
- FontLoader.bind(
- fontObjs,
- function pageEnsureFontsFontObjs(fontObjs) {
- this.stats.timeEnd('Font Loading');
- callback.call(this);
- }.bind(this)
- );
- },
- /**
- * For internal use only.
- */
- display: function PDFPageProxy_display(gfx, viewport, callback,
- continueCallback) {
- var stats = this.stats;
- stats.time('Rendering');
- gfx.beginDrawing(viewport);
- var startIdx = 0;
- var length = this.operatorList.fnArray.length;
- var operatorList = this.operatorList;
- var stepper = null;
- if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
- globalScope['StepperManager'].enabled) {
- stepper = globalScope['StepperManager'].create(this.pageNumber - 1);
- stepper.init(operatorList);
- stepper.nextBreakPoint = stepper.getNextBreakPoint();
- }
- var continueWrapper;
- if (continueCallback)
- continueWrapper = function() { continueCallback(next); }
- else
- continueWrapper = next;
- var self = this;
- function next() {
- startIdx = gfx.executeOperatorList(operatorList, startIdx,
- continueWrapper, stepper);
- if (startIdx == length) {
- gfx.endDrawing();
- stats.timeEnd('Rendering');
- stats.timeEnd('Overall');
- if (callback) callback();
- }
- }
- continueWrapper();
- },
- /**
- * @return {Promise} That is resolved with the a {string} that is the text
- * content from the page.
- */
- getTextContent: function PDFPageProxy_getTextContent() {
- var promise = new PDFJS.Promise();
- this.transport.messageHandler.send('GetTextContent', {
- pageIndex: this.pageNumber - 1
- },
- function textContentCallback(textContent) {
- promise.resolve(textContent);
- }
- );
- return promise;
- },
- /**
- * Stub for future feature.
- */
- getOperationList: function PDFPageProxy_getOperationList() {
- var promise = new PDFJS.Promise();
- var operationList = { // not implemented
- dependencyFontsID: null,
- operatorList: null
- };
- promise.resolve(operationList);
- return promise;
- },
- /**
- * Destroys resources allocated by the page.
- */
- destroy: function PDFPageProxy_destroy() {
- this.destroyed = true;
- if (!this.renderInProgress) {
- delete this.operatorList;
- delete this.displayReadyPromise;
- this.objs.clear();
- }
- }
- };
- return PDFPageProxy;
- })();
- /**
- * For internal use only.
- */
- var WorkerTransport = (function WorkerTransportClosure() {
- function WorkerTransport(workerInitializedPromise, workerReadyPromise) {
- this.workerReadyPromise = workerReadyPromise;
- this.commonObjs = new PDFObjects();
- this.pageCache = [];
- this.pagePromises = [];
- this.embeddedFontsUsed = false;
- // If worker support isn't disabled explicit and the browser has worker
- // support, create a new web worker and test if it/the browser fullfills
- // all requirements to run parts of pdf.js in a web worker.
- // Right now, the requirement is, that an Uint8Array is still an Uint8Array
- // as it arrives on the worker. Chrome added this with version 15.
- if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
- var workerSrc = '/pdf.js/worker_loader.js';
- if (typeof workerSrc === 'undefined') {
- error('No PDFJS.workerSrc specified');
- }
- try {
- // Some versions of FF can't create a worker on localhost, see:
- // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
- var worker = new Worker('/pdf.js/worker_loader.js');
- var messageHandler = new MessageHandler('main', worker);
- this.messageHandler = messageHandler;
- messageHandler.on('test', function transportTest(supportTypedArray) {
- if (supportTypedArray) {
- this.worker = worker;
- this.setupMessageHandler(messageHandler);
- } else {
- globalScope.PDFJS.disableWorker = true;
- this.setupFakeWorker();
- }
- workerInitializedPromise.resolve();
- }.bind(this));
- var testObj = new Uint8Array(1);
- // Some versions of Opera throw a DATA_CLONE_ERR on
- // serializing the typed array.
- messageHandler.send('test', testObj);
- return;
- } catch (e) {
- info('The worker has been disabled.');
- }
- }
- // Either workers are disabled, not supported or have thrown an exception.
- // Thus, we fallback to a faked worker.
- globalScope.PDFJS.disableWorker = true;
- this.setupFakeWorker();
- workerInitializedPromise.resolve();
- }
- WorkerTransport.prototype = {
- destroy: function WorkerTransport_destroy() {
- if (this.worker)
- this.worker.terminate();
- this.pageCache = [];
- this.pagePromises = [];
- },
- setupFakeWorker: function WorkerTransport_setupFakeWorker() {
- warn('Setting up fake worker.');
- // If we don't use a worker, just post/sendMessage to the main thread.
- var fakeWorker = {
- postMessage: function WorkerTransport_postMessage(obj) {
- fakeWorker.onmessage({data: obj});
- },
- terminate: function WorkerTransport_terminate() {}
- };
- var messageHandler = new MessageHandler('main', fakeWorker);
- this.setupMessageHandler(messageHandler);
- // If the main thread is our worker, setup the handling for the messages
- // the main thread sends to it self.
- WorkerMessageHandler.setup(messageHandler);
- },
- setupMessageHandler:
- function WorkerTransport_setupMessageHandler(messageHandler) {
- this.messageHandler = messageHandler;
- messageHandler.on('GetDoc', function transportDoc(data) {
- var pdfInfo = data.pdfInfo;
- var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
- this.pdfDocument = pdfDocument;
- this.workerReadyPromise.resolve(pdfDocument);
- }, this);
- messageHandler.on('NeedPassword', function transportPassword(data) {
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('IncorrectPassword', function transportBadPass(data) {
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('InvalidPDF', function transportInvalidPDF(data) {
- this.workerReadyPromise.reject(data.exception.name, data.exception);
- }, this);
- messageHandler.on('UnknownError', function transportUnknownError(data) {
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('GetPage', function transportPage(data) {
- var pageInfo = data.pageInfo;
- var page = new PDFPageProxy(pageInfo, this);
- this.pageCache[pageInfo.pageIndex] = page;
- var promise = this.pagePromises[pageInfo.pageIndex];
- promise.resolve(page);
- }, this);
- messageHandler.on('GetAnnotations', function transportAnnotations(data) {
- var annotations = data.annotations;
- var promise = this.pageCache[data.pageIndex].annotationsPromise;
- promise.resolve(annotations);
- }, this);
- messageHandler.on('RenderPage', function transportRender(data) {
- var page = this.pageCache[data.pageIndex];
- var depFonts = data.depFonts;
- page.stats.timeEnd('Page Request');
- page.startRenderingFromOperatorList(data.operatorList, depFonts);
- }, this);
- messageHandler.on('commonobj', function transportObj(data) {
- var id = data[0];
- var type = data[1];
- if (this.commonObjs.hasData(id))
- return;
- switch (type) {
- case 'Font':
- var exportedData = data[2];
- // At this point, only the font object is created but the font is
- // not yet attached to the DOM. This is done in `FontLoader.bind`.
- var font;
- if ('error' in exportedData)
- font = new ErrorFont(exportedData.error);
- else
- font = new Font(exportedData);
- this.commonObjs.resolve(id, font);
- break;
- default:
- error('Got unknown common object type ' + type);
- }
- }, this);
- messageHandler.on('obj', function transportObj(data) {
- var id = data[0];
- var pageIndex = data[1];
- var type = data[2];
- var pageProxy = this.pageCache[pageIndex];
- if (pageProxy.objs.hasData(id))
- return;
- switch (type) {
- case 'JpegStream':
- var imageData = data[3];
- loadJpegStream(id, imageData, pageProxy.objs);
- break;
- case 'Image':
- var imageData = data[3];
- pageProxy.objs.resolve(id, imageData);
- // heuristics that will allow not to store large data
- var MAX_IMAGE_SIZE_TO_STORE = 8000000;
- if ('data' in imageData &&
- imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
- pageProxy.cleanupAfterRender = true;
- }
- break;
- default:
- error('Got unknown object type ' + type);
- }
- }, this);
- messageHandler.on('DocProgress', function transportDocProgress(data) {
- this.workerReadyPromise.progress({
- loaded: data.loaded,
- total: data.total
- });
- }, this);
- messageHandler.on('DocError', function transportDocError(data) {
- this.workerReadyPromise.reject(data);
- }, this);
- messageHandler.on('PageError', function transportError(data) {
- var page = this.pageCache[data.pageNum - 1];
- if (page.displayReadyPromise)
- page.displayReadyPromise.reject(data.error);
- else
- error(data.error);
- }, this);
- messageHandler.on('JpegDecode', function(data, promise) {
- var imageData = data[0];
- var components = data[1];
- if (components != 3 && components != 1)
- error('Only 3 component or 1 component can be returned');
- var img = new Image();
- img.onload = (function messageHandler_onloadClosure() {
- var width = img.width;
- var height = img.height;
- var size = width * height;
- var rgbaLength = size * 4;
- var buf = new Uint8Array(size * components);
- var tmpCanvas = createScratchCanvas(width, height);
- var tmpCtx = tmpCanvas.getContext('2d');
- tmpCtx.drawImage(img, 0, 0);
- var data = tmpCtx.getImageData(0, 0, width, height).data;
- if (components == 3) {
- for (var i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
- buf[j] = data[i];
- buf[j + 1] = data[i + 1];
- buf[j + 2] = data[i + 2];
- }
- } else if (components == 1) {
- for (var i = 0, j = 0; i < rgbaLength; i += 4, j++) {
- buf[j] = data[i];
- }
- }
- promise.resolve({ data: buf, width: width, height: height});
- }).bind(this);
- var src = 'data:image/jpeg;base64,' + window.btoa(imageData);
- img.src = src;
- });
- },
- fetchDocument: function WorkerTransport_fetchDocument(source) {
- this.messageHandler.send('GetDocRequest', {source: source});
- },
- getData: function WorkerTransport_getData(promise) {
- this.messageHandler.send('GetData', null, function(data) {
- promise.resolve(data);
- });
- },
- getPage: function WorkerTransport_getPage(pageNumber, promise) {
- var pageIndex = pageNumber - 1;
- if (pageIndex in this.pagePromises)
- return this.pagePromises[pageIndex];
- var promise = new PDFJS.Promise('Page ' + pageNumber);
- this.pagePromises[pageIndex] = promise;
- this.messageHandler.send('GetPageRequest', { pageIndex: pageIndex });
- return promise;
- },
- getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
- this.messageHandler.send('GetAnnotationsRequest',
- { pageIndex: pageIndex });
- }
- };
- return WorkerTransport;
- })();
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