/* 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 pdfjsFilePath */
'use strict';
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
define('pdfjs/display/api', ['exports', 'pdfjs/shared/util',
'pdfjs/display/font_loader', 'pdfjs/display/canvas',
'pdfjs/display/metadata', 'pdfjs/shared/global', 'require'], factory);
} else if (typeof exports !== 'undefined') {
factory(exports, require('../shared/util.js'), require('./font_loader.js'),
require('./canvas.js'), require('./metadata.js'),
require('../shared/global.js'));
} else {
factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil,
root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas,
root.pdfjsDisplayMetadata, root.pdfjsSharedGlobal);
}
}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas,
displayMetadata, sharedGlobal, amdRequire) {
var InvalidPDFException = sharedUtil.InvalidPDFException;
var MessageHandler = sharedUtil.MessageHandler;
var MissingPDFException = sharedUtil.MissingPDFException;
var PasswordResponses = sharedUtil.PasswordResponses;
var PasswordException = sharedUtil.PasswordException;
var StatTimer = sharedUtil.StatTimer;
var UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
var UnknownErrorException = sharedUtil.UnknownErrorException;
var Util = sharedUtil.Util;
var createPromiseCapability = sharedUtil.createPromiseCapability;
var combineUrl = sharedUtil.combineUrl;
var error = sharedUtil.error;
var deprecated = sharedUtil.deprecated;
var info = sharedUtil.info;
var isArrayBuffer = sharedUtil.isArrayBuffer;
var loadJpegStream = sharedUtil.loadJpegStream;
var stringToBytes = sharedUtil.stringToBytes;
var warn = sharedUtil.warn;
var FontFaceObject = displayFontLoader.FontFaceObject;
var FontLoader = displayFontLoader.FontLoader;
var CanvasGraphics = displayCanvas.CanvasGraphics;
var createScratchCanvas = displayCanvas.createScratchCanvas;
var Metadata = displayMetadata.Metadata;
var PDFJS = sharedGlobal.PDFJS;
var globalScope = sharedGlobal.globalScope;
var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536
//#if PRODUCTION && !SINGLE_FILE
//#if GENERIC
//#include ../src/frameworks.js
//#else
//var fakeWorkerFilesLoader = null;
//#endif
//#endif
/**
* The maximum allowed image size in total pixels e.g. width * height. Images
* above this value will not be drawn. Use -1 for no limit.
* @var {number}
*/
PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
-1 : PDFJS.maxImageSize);
/**
* The url of where the predefined Adobe CMaps are located. Include trailing
* slash.
* @var {string}
*/
PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);
/**
* Specifies if CMaps are binary packed.
* @var {boolean}
*/
PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;
/**
* By default fonts are converted to OpenType fonts and loaded via font face
* rules. If disabled, the font will be rendered using a built in font renderer
* that constructs the glyphs with primitive path commands.
* @var {boolean}
*/
PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
false : PDFJS.disableFontFace);
/**
* Path for image resources, mainly for annotation icons. Include trailing
* slash.
* @var {string}
*/
PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
'' : PDFJS.imageResourcesPath);
/**
* Disable the web worker and run all code on the main thread. This will happen
* automatically if the browser doesn't support workers or sending typed arrays
* to workers.
* @var {boolean}
*/
PDFJS.disableWorker = (PDFJS.disableWorker === undefined ?
false : PDFJS.disableWorker);
/**
* Path and filename of the worker file. Required when the worker is enabled in
* development mode. If unspecified in the production build, the worker will be
* loaded based on the location of the pdf.js file. It is recommended that
* the workerSrc is set in a custom application to prevent issues caused by
* third-party frameworks and libraries.
* @var {string}
*/
PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);
/**
* Disable range request loading of PDF files. When enabled and if the server
* supports partial content requests then the PDF will be fetched in chunks.
* Enabled (false) by default.
* @var {boolean}
*/
PDFJS.disableRange = (PDFJS.disableRange === undefined ?
false : PDFJS.disableRange);
/**
* Disable streaming of PDF file data. By default PDF.js attempts to load PDF
* in chunks. This default behavior can be disabled.
* @var {boolean}
*/
PDFJS.disableStream = (PDFJS.disableStream === undefined ?
false : PDFJS.disableStream);
/**
* Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
* will automatically keep fetching more data even if it isn't needed to display
* the current page. This default behavior can be disabled.
*
* NOTE: It is also necessary to disable streaming, see above,
* in order for disabling of pre-fetching to work correctly.
* @var {boolean}
*/
PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
false : PDFJS.disableAutoFetch);
/**
* Enables special hooks for debugging PDF.js.
* @var {boolean}
*/
PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);
/**
* Enables transfer usage in postMessage for ArrayBuffers.
* @var {boolean}
*/
PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
true : PDFJS.postMessageTransfers);
/**
* Disables URL.createObjectURL usage.
* @var {boolean}
*/
PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
false : PDFJS.disableCreateObjectURL);
/**
* Disables WebGL usage.
* @var {boolean}
*/
PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
true : PDFJS.disableWebGL);
/**
* Disables fullscreen support, and by extension Presentation Mode,
* in browsers which support the fullscreen API.
* @var {boolean}
*/
PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?
false : PDFJS.disableFullscreen);
/**
* Enables CSS only zooming.
* @var {boolean}
*/
PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ?
false : PDFJS.useOnlyCssZoom);
/**
* Controls the logging level.
* The constants from PDFJS.VERBOSITY_LEVELS should be used:
* - errors
* - warnings [default]
* - infos
* @var {number}
*/
PDFJS.verbosity = (PDFJS.verbosity === undefined ?
PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);
/**
* The maximum supported canvas size in total pixels e.g. width * height.
* The default value is 4096 * 4096. Use -1 for no limit.
* @var {number}
*/
PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
16777216 : PDFJS.maxCanvasPixels);
/**
* (Deprecated) Opens external links in a new window if enabled.
* The default behavior opens external links in the PDF.js window.
*
* NOTE: This property has been deprecated, please use
* `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead.
* @var {boolean}
*/
PDFJS.openExternalLinksInNewWindow = (
PDFJS.openExternalLinksInNewWindow === undefined ?
false : PDFJS.openExternalLinksInNewWindow);
/**
* Specifies the |target| attribute for external links.
* The constants from PDFJS.LinkTarget should be used:
* - NONE [default]
* - SELF
* - BLANK
* - PARENT
* - TOP
* @var {number}
*/
PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ?
PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget);
/**
* Specifies the |rel| attribute for external links. Defaults to stripping
* the referrer.
* @var {string}
*/
PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ?
'noreferrer' : PDFJS.externalLinkRel);
/**
* Determines if we can eval strings as JS. Primarily used to improve
* performance for font rendering.
* @var {boolean}
*/
PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ?
true : PDFJS.isEvalSupported);
/**
* Document initialization / loading parameters object.
*
* @typedef {Object} DocumentInitParameters
* @property {string} url - The URL of the PDF.
* @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
* (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
* use atob() to convert it to a binary string first.
* @property {Object} httpHeaders - Basic authentication headers.
* @property {boolean} withCredentials - Indicates whether or not cross-site
* Access-Control requests should be made using credentials such as cookies
* or authorization headers. The default is false.
* @property {string} password - For decrypting password-protected PDFs.
* @property {TypedArray} initialData - A typed array with the first portion or
* all of the pdf data. Used by the extension since some data is already
* loaded before the switch to range requests.
* @property {number} length - The PDF file length. It's used for progress
* reports and range requests operations.
* @property {PDFDataRangeTransport} range
* @property {number} rangeChunkSize - Optional parameter to specify
* maximum number of bytes fetched per range request. The default value is
* 2^16 = 65536.
* @property {PDFWorker} worker - The worker that will be used for the loading
* and parsing of the PDF data.
*/
/**
* @typedef {Object} PDFDocumentStats
* @property {Array} streamTypes - Used stream types in the document (an item
* is set to true if specific stream ID was used in the document).
* @property {Array} fontTypes - Used font type in the document (an item is set
* to true if specific font ID was used in the document).
*/
/**
* This is the main entry point for loading a PDF and interacting with it.
* NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
* is used, which means it must follow the same origin rules that any XHR does
* e.g. No cross domain requests without CORS.
*
* @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
* Can be a url to where a PDF is located, a typed array (Uint8Array)
* already populated with data or parameter object.
*
* @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
* if you want to manually serve range requests for data in the PDF.
*
* @param {function} passwordCallback (deprecated) It is used to request a
* password if wrong or no password was provided. The callback receives two
* parameters: function that needs to be called with new password and reason
* (see {PasswordResponses}).
*
* @param {function} progressCallback (deprecated) It is used to be able to
* monitor the loading progress of the PDF file (necessary to implement e.g.
* a loading bar). The callback receives an {Object} with the properties:
* {number} loaded and {number} total.
*
* @return {PDFDocumentLoadingTask}
*/
PDFJS.getDocument = function getDocument(src,
pdfDataRangeTransport,
passwordCallback,
progressCallback) {
var task = new PDFDocumentLoadingTask();
// Support of the obsolete arguments (for compatibility with API v1.0)
if (arguments.length > 1) {
deprecated('getDocument is called with pdfDataRangeTransport, ' +
'passwordCallback or progressCallback argument');
}
if (pdfDataRangeTransport) {
if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
// Not a PDFDataRangeTransport instance, trying to add missing properties.
pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
pdfDataRangeTransport.length = src.length;
pdfDataRangeTransport.initialData = src.initialData;
if (!pdfDataRangeTransport.abort) {
pdfDataRangeTransport.abort = function () {};
}
}
src = Object.create(src);
src.range = pdfDataRangeTransport;
}
task.onPassword = passwordCallback || null;
task.onProgress = progressCallback || null;
var source;
if (typeof src === 'string') {
source = { url: src };
} else if (isArrayBuffer(src)) {
source = { data: src };
} else if (src instanceof PDFDataRangeTransport) {
source = { range: src };
} else {
if (typeof src !== 'object') {
error('Invalid parameter in getDocument, need either Uint8Array, ' +
'string or a parameter object');
}
if (!src.url && !src.data && !src.range) {
error('Invalid parameter object: need either .data, .range or .url');
}
source = src;
}
var params = {};
var rangeTransport = null;
var worker = null;
for (var key in source) {
if (key === 'url' && typeof window !== 'undefined') {
// The full path is required in the 'url' field.
params[key] = combineUrl(window.location.href, source[key]);
continue;
} else if (key === 'range') {
rangeTransport = source[key];
continue;
} else if (key === 'worker') {
worker = source[key];
continue;
} else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
// Converting string or array-like data to Uint8Array.
var pdfBytes = source[key];
if (typeof pdfBytes === 'string') {
params[key] = stringToBytes(pdfBytes);
} else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
!isNaN(pdfBytes.length)) {
params[key] = new Uint8Array(pdfBytes);
} else if (isArrayBuffer(pdfBytes)) {
params[key] = new Uint8Array(pdfBytes);
} else {
error('Invalid PDF binary data: either typed array, string or ' +
'array-like object is expected in the data property.');
}
continue;
}
params[key] = source[key];
}
params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
if (!worker) {
// Worker was not provided -- creating and owning our own.
worker = new PDFWorker();
task._worker = worker;
}
var docId = task.docId;
worker.promise.then(function () {
if (task.destroyed) {
throw new Error('Loading aborted');
}
return _fetchDocument(worker, params, rangeTransport, docId).then(
function (workerId) {
if (task.destroyed) {
throw new Error('Loading aborted');
}
var messageHandler = new MessageHandler(docId, workerId, worker.port);
messageHandler.send('Ready', null);
var transport = new WorkerTransport(messageHandler, task, rangeTransport);
task._transport = transport;
});
}).catch(task._capability.reject);
return task;
};
/**
* Starts fetching of specified PDF document/data.
* @param {PDFWorker} worker
* @param {Object} source
* @param {PDFDataRangeTransport} pdfDataRangeTransport
* @param {string} docId Unique document id, used as MessageHandler id.
* @returns {Promise} The promise, which is resolved when worker id of
* MessageHandler is known.
* @private
*/
function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
if (worker.destroyed) {
return Promise.reject(new Error('Worker was destroyed'));
}
source.disableAutoFetch = PDFJS.disableAutoFetch;
source.disableStream = PDFJS.disableStream;
source.chunkedViewerLoading = !!pdfDataRangeTransport;
if (pdfDataRangeTransport) {
source.length = pdfDataRangeTransport.length;
source.initialData = pdfDataRangeTransport.initialData;
}
return worker.messageHandler.sendWithPromise('GetDocRequest', {
docId: docId,
source: source,
disableRange: PDFJS.disableRange,
maxImageSize: PDFJS.maxImageSize,
cMapUrl: PDFJS.cMapUrl,
cMapPacked: PDFJS.cMapPacked,
disableFontFace: PDFJS.disableFontFace,
disableCreateObjectURL: PDFJS.disableCreateObjectURL,
verbosity: PDFJS.verbosity
}).then(function (workerId) {
if (worker.destroyed) {
throw new Error('Worker was destroyed');
}
return workerId;
});
}
/**
* PDF document loading operation.
* @class
* @alias PDFDocumentLoadingTask
*/
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
var nextDocumentId = 0;
/** @constructs PDFDocumentLoadingTask */
function PDFDocumentLoadingTask() {
this._capability = createPromiseCapability();
this._transport = null;
this._worker = null;
/**
* Unique document loading task id -- used in MessageHandlers.
* @type {string}
*/
this.docId = 'd' + (nextDocumentId++);
/**
* Shows if loading task is destroyed.
* @type {boolean}
*/
this.destroyed = false;
/**
* Callback to request a password if wrong or no password was provided.
* The callback receives two parameters: function that needs to be called
* with new password and reason (see {PasswordResponses}).
*/
this.onPassword = null;
/**
* Callback to be able to monitor the loading progress of the PDF file
* (necessary to implement e.g. a loading bar). The callback receives
* an {Object} with the properties: {number} loaded and {number} total.
*/
this.onProgress = null;
/**
* Callback to when unsupported feature is used. The callback receives
* an {PDFJS.UNSUPPORTED_FEATURES} argument.
*/
this.onUnsupportedFeature = null;
}
PDFDocumentLoadingTask.prototype =
/** @lends PDFDocumentLoadingTask.prototype */ {
/**
* @return {Promise}
*/
get promise() {
return this._capability.promise;
},
/**
* Aborts all network requests and destroys worker.
* @return {Promise} A promise that is resolved after destruction activity
* is completed.
*/
destroy: function () {
this.destroyed = true;
var transportDestroyed = !this._transport ? Promise.resolve() :
this._transport.destroy();
return transportDestroyed.then(function () {
this._transport = null;
if (this._worker) {
this._worker.destroy();
this._worker = null;
}
}.bind(this));
},
/**
* Registers callbacks to indicate the document loading completion.
*
* @param {function} onFulfilled The callback for the loading completion.
* @param {function} onRejected The callback for the loading failure.
* @return {Promise} A promise that is resolved after the onFulfilled or
* onRejected callback.
*/
then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
return this.promise.then.apply(this.promise, arguments);
}
};
return PDFDocumentLoadingTask;
})();
/**
* Abstract class to support range requests file loading.
* @class
* @alias PDFJS.PDFDataRangeTransport
* @param {number} length
* @param {Uint8Array} initialData
*/
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
function PDFDataRangeTransport(length, initialData) {
this.length = length;
this.initialData = initialData;
this._rangeListeners = [];
this._progressListeners = [];
this._progressiveReadListeners = [];
this._readyCapability = createPromiseCapability();
}
PDFDataRangeTransport.prototype =
/** @lends PDFDataRangeTransport.prototype */ {
addRangeListener:
function PDFDataRangeTransport_addRangeListener(listener) {
this._rangeListeners.push(listener);
},
addProgressListener:
function PDFDataRangeTransport_addProgressListener(listener) {
this._progressListeners.push(listener);
},
addProgressiveReadListener:
function PDFDataRangeTransport_addProgressiveReadListener(listener) {
this._progressiveReadListeners.push(listener);
},
onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
var listeners = this._rangeListeners;
for (var i = 0, n = listeners.length; i < n; ++i) {
listeners[i](begin, chunk);
}
},
onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
this._readyCapability.promise.then(function () {
var listeners = this._progressListeners;
for (var i = 0, n = listeners.length; i < n; ++i) {
listeners[i](loaded);
}
}.bind(this));
},
onDataProgressiveRead:
function PDFDataRangeTransport_onDataProgress(chunk) {
this._readyCapability.promise.then(function () {
var listeners = this._progressiveReadListeners;
for (var i = 0, n = listeners.length; i < n; ++i) {
listeners[i](chunk);
}
}.bind(this));
},
transportReady: function PDFDataRangeTransport_transportReady() {
this._readyCapability.resolve();
},
requestDataRange:
function PDFDataRangeTransport_requestDataRange(begin, end) {
throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
},
abort: function PDFDataRangeTransport_abort() {
}
};
return PDFDataRangeTransport;
})();
PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;
/**
* Proxy to a PDFDocument in the worker thread. Also, contains commonly used
* properties that can be read synchronously.
* @class
* @alias PDFDocumentProxy
*/
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
this.pdfInfo = pdfInfo;
this.transport = transport;
this.loadingTask = loadingTask;
}
PDFDocumentProxy.prototype = /** @lends 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;
},
/**
* @param {number} pageNumber The page number to get. The first page is 1.
* @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
* object.
*/
getPage: function PDFDocumentProxy_getPage(pageNumber) {
return this.transport.getPage(pageNumber);
},
/**
* @param {{num: number, gen: number}} ref The page reference. Must have
* the 'num' and 'gen' properties.
* @return {Promise} A promise that is resolved with the page index that is
* associated with the reference.
*/
getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
return this.transport.getPageIndex(ref);
},
/**
* @return {Promise} A promise that is resolved with a lookup table for
* mapping named destinations to reference numbers.
*
* This can be slow for large documents: use getDestination instead
*/
getDestinations: function PDFDocumentProxy_getDestinations() {
return this.transport.getDestinations();
},
/**
* @param {string} id The named destination to get.
* @return {Promise} A promise that is resolved with all information
* of the given named destination.
*/
getDestination: function PDFDocumentProxy_getDestination(id) {
return this.transport.getDestination(id);
},
/**
* @return {Promise} A promise that is resolved with a lookup table for
* mapping named attachments to their content.
*/
getAttachments: function PDFDocumentProxy_getAttachments() {
return this.transport.getAttachments();
},
/**
* @return {Promise} A promise that is resolved with an array of all the
* JavaScript strings in the name tree.
*/
getJavaScript: function PDFDocumentProxy_getJavaScript() {
return this.transport.getJavaScript();
},
/**
* @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() {
return this.transport.getOutline();
},
/**
* @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() {
return this.transport.getMetadata();
},
/**
* @return {Promise} A promise that is resolved with a TypedArray that has
* the raw data from the PDF.
*/
getData: function PDFDocumentProxy_getData() {
return this.transport.getData();
},
/**
* @return {Promise} A promise that is resolved when the document's data
* is loaded. It is resolved with an {Object} that contains the length
* property that indicates size of the PDF data in bytes.
*/
getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
return this.transport.downloadInfoCapability.promise;
},
/**
* @return {Promise} A promise this is resolved with current stats about
* document structures (see {@link PDFDocumentStats}).
*/
getStats: function PDFDocumentProxy_getStats() {
return this.transport.getStats();
},
/**
* Cleans up resources allocated by the document, e.g. created @font-face.
*/
cleanup: function PDFDocumentProxy_cleanup() {
this.transport.startCleanup();
},
/**
* Destroys current document instance and terminates worker.
*/
destroy: function PDFDocumentProxy_destroy() {
return this.loadingTask.destroy();
}
};
return PDFDocumentProxy;
})();
/**
* Page getTextContent parameters.
*
* @typedef {Object} getTextContentParameters
* @param {boolean} normalizeWhitespace - replaces all occurrences of
* whitespace with standard spaces (0x20). The default value is `false`.
*/
/**
* Page text content.
*
* @typedef {Object} TextContent
* @property {array} items - array of {@link TextItem}
* @property {Object} styles - {@link TextStyles} objects, indexed by font
* name.
*/
/**
* Page text content part.
*
* @typedef {Object} TextItem
* @property {string} str - text content.
* @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
* @property {array} transform - transformation matrix.
* @property {number} width - width in device space.
* @property {number} height - height in device space.
* @property {string} fontName - font name used by pdf.js for converted font.
*/
/**
* Text style.
*
* @typedef {Object} TextStyle
* @property {number} ascent - font ascent.
* @property {number} descent - font descent.
* @property {boolean} vertical - text is in vertical mode.
* @property {string} fontFamily - possible font family
*/
/**
* Page annotation parameters.
*
* @typedef {Object} GetAnnotationsParameters
* @param {string} intent - Determines the annotations that will be fetched,
* can be either 'display' (viewable annotations) or 'print'
* (printable annotations).
* If the parameter is omitted, all annotations are fetched.
*/
/**
* Page render parameters.
*
* @typedef {Object} RenderParameters
* @property {Object} canvasContext - A 2D context of a DOM Canvas object.
* @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by
* calling of PDFPage.getViewport method.
* @property {string} intent - Rendering intent, can be 'display' or 'print'
* (default value is 'display').
* @property {Array} transform - (optional) Additional transform, applied
* just before viewport transform.
* @property {Object} imageLayer - (optional) An object that has beginLayout,
* endLayout and appendImage functions.
* @property {function} continueCallback - (deprecated) 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.
*/
/**
* PDF page operator list.
*
* @typedef {Object} PDFOperatorList
* @property {Array} fnArray - Array containing the operator functions.
* @property {Array} argsArray - Array containing the arguments of the
* functions.
*/
/**
* Proxy to a PDFPage in the worker thread.
* @class
* @alias PDFPageProxy
*/
var PDFPageProxy = (function PDFPageProxyClosure() {
function PDFPageProxy(pageIndex, pageInfo, transport) {
this.pageIndex = pageIndex;
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.cleanupAfterRender = false;
this.pendingCleanup = false;
this.intentStates = {};
this.destroyed = false;
}
PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
/**
* @return {number} Page number of the page. First page is 1.
*/
get pageNumber() {
return this.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 {PDFJS.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);
},
/**
* @param {GetAnnotationsParameters} params - Annotation parameters.
* @return {Promise} A promise that is resolved with an {Array} of the
* annotation objects.
*/
getAnnotations: function PDFPageProxy_getAnnotations(params) {
var intent = (params && params.intent) || null;
if (!this.annotationsPromise || this.annotationsIntent !== intent) {
this.annotationsPromise = this.transport.getAnnotations(this.pageIndex,
intent);
this.annotationsIntent = intent;
}
return this.annotationsPromise;
},
/**
* Begins the process of rendering a page to the desired context.
* @param {RenderParameters} params Page render parameters.
* @return {RenderTask} An object that contains the promise, which
* is resolved when the page finishes rendering.
*/
render: function PDFPageProxy_render(params) {
var stats = this.stats;
stats.time('Overall');
// If there was a pending destroy cancel it so no cleanup happens during
// this call to render.
this.pendingCleanup = false;
var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
if (!this.intentStates[renderingIntent]) {
this.intentStates[renderingIntent] = {};
}
var intentState = this.intentStates[renderingIntent];
// If there's no displayReadyCapability yet, then the operatorList
// was never requested before. Make the request and create the promise.
if (!intentState.displayReadyCapability) {
intentState.receivingOperatorList = true;
intentState.displayReadyCapability = createPromiseCapability();
intentState.operatorList = {
fnArray: [],
argsArray: [],
lastChunk: false
};
this.stats.time('Page Request');
this.transport.messageHandler.send('RenderPageRequest', {
pageIndex: this.pageNumber - 1,
intent: renderingIntent
});
}
var internalRenderTask = new InternalRenderTask(complete, params,
this.objs,
this.commonObjs,
intentState.operatorList,
this.pageNumber);
internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
if (!intentState.renderTasks) {
intentState.renderTasks = [];
}
intentState.renderTasks.push(internalRenderTask);
var renderTask = internalRenderTask.task;
// Obsolete parameter support
if (params.continueCallback) {
deprecated('render is used with continueCallback parameter');
renderTask.onContinue = params.continueCallback;
}
var self = this;
intentState.displayReadyCapability.promise.then(
function pageDisplayReadyPromise(transparency) {
if (self.pendingCleanup) {
complete();
return;
}
stats.time('Rendering');
internalRenderTask.initalizeGraphics(transparency);
internalRenderTask.operatorListChanged();
},
function pageDisplayReadPromiseError(reason) {
complete(reason);
}
);
function complete(error) {
var i = intentState.renderTasks.indexOf(internalRenderTask);
if (i >= 0) {
intentState.renderTasks.splice(i, 1);
}
if (self.cleanupAfterRender) {
self.pendingCleanup = true;
}
self._tryCleanup();
if (error) {
internalRenderTask.capability.reject(error);
} else {
internalRenderTask.capability.resolve();
}
stats.timeEnd('Rendering');
stats.timeEnd('Overall');
}
return renderTask;
},
/**
* @return {Promise} A promise resolved with an {@link PDFOperatorList}
* object that represents page's operator list.
*/
getOperatorList: function PDFPageProxy_getOperatorList() {
function operatorListChanged() {
if (intentState.operatorList.lastChunk) {
intentState.opListReadCapability.resolve(intentState.operatorList);
}
}
var renderingIntent = 'oplist';
if (!this.intentStates[renderingIntent]) {
this.intentStates[renderingIntent] = {};
}
var intentState = this.intentStates[renderingIntent];
if (!intentState.opListReadCapability) {
var opListTask = {};
opListTask.operatorListChanged = operatorListChanged;
intentState.receivingOperatorList = true;
intentState.opListReadCapability = createPromiseCapability();
intentState.renderTasks = [];
intentState.renderTasks.push(opListTask);
intentState.operatorList = {
fnArray: [],
argsArray: [],
lastChunk: false
};
this.transport.messageHandler.send('RenderPageRequest', {
pageIndex: this.pageIndex,
intent: renderingIntent
});
}
return intentState.opListReadCapability.promise;
},
/**
* @param {getTextContentParameters} params - getTextContent parameters.
* @return {Promise} That is resolved a {@link TextContent}
* object that represent the page text content.
*/
getTextContent: function PDFPageProxy_getTextContent(params) {
var normalizeWhitespace = (params && params.normalizeWhitespace) || false;
return this.transport.messageHandler.sendWithPromise('GetTextContent', {
pageIndex: this.pageNumber - 1,
normalizeWhitespace: normalizeWhitespace,
});
},
/**
* Destroys page object.
*/
_destroy: function PDFPageProxy_destroy() {
this.destroyed = true;
this.transport.pageCache[this.pageIndex] = null;
var waitOn = [];
Object.keys(this.intentStates).forEach(function(intent) {
var intentState = this.intentStates[intent];
intentState.renderTasks.forEach(function(renderTask) {
var renderCompleted = renderTask.capability.promise.
catch(function () {}); // ignoring failures
waitOn.push(renderCompleted);
renderTask.cancel();
});
}, this);
this.objs.clear();
this.annotationsPromise = null;
this.pendingCleanup = false;
return Promise.all(waitOn);
},
/**
* Cleans up resources allocated by the page. (deprecated)
*/
destroy: function() {
deprecated('page destroy method, use cleanup() instead');
this.cleanup();
},
/**
* Cleans up resources allocated by the page.
*/
cleanup: function PDFPageProxy_cleanup() {
this.pendingCleanup = true;
this._tryCleanup();
},
/**
* For internal use only. Attempts to clean up if rendering is in a state
* where that's possible.
* @ignore
*/
_tryCleanup: function PDFPageProxy_tryCleanup() {
if (!this.pendingCleanup ||
Object.keys(this.intentStates).some(function(intent) {
var intentState = this.intentStates[intent];
return (intentState.renderTasks.length !== 0 ||
intentState.receivingOperatorList);
}, this)) {
return;
}
Object.keys(this.intentStates).forEach(function(intent) {
delete this.intentStates[intent];
}, this);
this.objs.clear();
this.annotationsPromise = null;
this.pendingCleanup = false;
},
/**
* For internal use only.
* @ignore
*/
_startRenderPage: function PDFPageProxy_startRenderPage(transparency,
intent) {
var intentState = this.intentStates[intent];
// TODO Refactor RenderPageRequest to separate rendering
// and operator list logic
if (intentState.displayReadyCapability) {
intentState.displayReadyCapability.resolve(transparency);
}
},
/**
* For internal use only.
* @ignore
*/
_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
intent) {
var intentState = this.intentStates[intent];
var i, ii;
// Add the new chunk to the current operator list.
for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
intentState.operatorList.argsArray.push(
operatorListChunk.argsArray[i]);
}
intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
// Notify all the rendering tasks there are more operators to be consumed.
for (i = 0; i < intentState.renderTasks.length; i++) {
intentState.renderTasks[i].operatorListChanged();
}
if (operatorListChunk.lastChunk) {
intentState.receivingOperatorList = false;
this._tryCleanup();
}
}
};
return PDFPageProxy;
})();
/**
* PDF.js web worker abstraction, it controls instantiation of PDF documents and
* WorkerTransport for them. If creation of a web worker is not possible,
* a "fake" worker will be used instead.
* @class
*/
var PDFWorker = (function PDFWorkerClosure() {
var nextFakeWorkerId = 0;
function getWorkerSrc() {
if (PDFJS.workerSrc) {
return PDFJS.workerSrc;
}
//#if PRODUCTION && !(MOZCENTRAL || FIREFOX)
// if (pdfjsFilePath) {
// return pdfjsFilePath.replace(/\.js$/i, '.worker.js');
// }
//#endif
error('No PDFJS.workerSrc specified');
}
// Loads worker code into main thread.
function setupFakeWorkerGlobal() {
if (!PDFJS.fakeWorkerFilesLoadedCapability) {
PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability();
// In the developer build load worker_loader which in turn loads all the
// other files and resolves the promise. In production only the
// pdf.worker.js file is needed.
//#if !PRODUCTION
if (typeof amdRequire === 'function') {
amdRequire(['pdfjs/core/network', 'pdfjs/core/worker'], function () {
PDFJS.fakeWorkerFilesLoadedCapability.resolve();
});
} else if (typeof require === 'function') {
require('../core/worker.js');
PDFJS.fakeWorkerFilesLoadedCapability.resolve();
} else {
throw new Error('AMD or CommonJS must be used to load fake worker.');
}
//#endif
//#if PRODUCTION && SINGLE_FILE
// PDFJS.fakeWorkerFilesLoadedCapability.resolve();
//#endif
//#if PRODUCTION && !SINGLE_FILE
// var loader = fakeWorkerFilesLoader || function (callback) {
// Util.loadScript(getWorkerSrc(), callback);
// };
// loader(function () {
// PDFJS.fakeWorkerFilesLoadedCapability.resolve();
// });
//#endif
}
return PDFJS.fakeWorkerFilesLoadedCapability.promise;
}
function PDFWorker(name) {
this.name = name;
this.destroyed = false;
this._readyCapability = createPromiseCapability();
this._port = null;
this._webWorker = null;
this._messageHandler = null;
this._initialize();
}
PDFWorker.prototype = /** @lends PDFWorker.prototype */ {
get promise() {
return this._readyCapability.promise;
},
get port() {
return this._port;
},
get messageHandler() {
return this._messageHandler;
},
_initialize: function PDFWorker_initialize() {
// 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 v.15.)
//#if !SINGLE_FILE
if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
var workerSrc = getWorkerSrc();
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(workerSrc);
var messageHandler = new MessageHandler('main', 'worker', worker);
//#if !PRODUCTION
// Don't allow worker to be destroyed by Chrome, see:
// https://code.google.com/p/chromium/issues/detail?id=572225
var jsWorkerId = '_workerKungfuGrip_' + Math.random();
window[jsWorkerId] = worker;
//#endif
messageHandler.on('test', function PDFWorker_test(data) {
//#if !PRODUCTION
delete window[jsWorkerId];
//#endif
if (this.destroyed) {
this._readyCapability.reject(new Error('Worker was destroyed'));
messageHandler.destroy();
worker.terminate();
return; // worker was destroyed
}
var supportTypedArray = data && data.supportTypedArray;
if (supportTypedArray) {
this._messageHandler = messageHandler;
this._port = worker;
this._webWorker = worker;
if (!data.supportTransfers) {
PDFJS.postMessageTransfers = false;
}
this._readyCapability.resolve();
} else {
this._setupFakeWorker();
messageHandler.destroy();
worker.terminate();
}
}.bind(this));
messageHandler.on('console_log', function (data) {
console.log.apply(console, data);
});
messageHandler.on('console_error', function (data) {
console.error.apply(console, data);
});
messageHandler.on('ready', function (data) {
if (this.destroyed) {
this._readyCapability.reject(new Error('Worker was destroyed'));
messageHandler.destroy();
worker.terminate();
return; // worker was destroyed
}
try {
sendTest();
} catch (e) {
// We need fallback to a faked worker.
this._setupFakeWorker();
}
}.bind(this));
var sendTest = function () {
var testObj = new Uint8Array(
[PDFJS.postMessageTransfers ? 255 : 0]);
// Some versions of Opera throw a DATA_CLONE_ERR on serializing the
// typed array. Also, checking if we can use transfers.
try {
messageHandler.send('test', testObj, [testObj.buffer]);
} catch (ex) {
info('Cannot use postMessage transfers');
testObj[0] = 0;
messageHandler.send('test', testObj);
}
};
// It might take time for worker to initialize (especially when AMD
// loader is used). We will try to send test immediately, and then
// when 'ready' message will arrive. The worker shall process only
// first received 'test'.
sendTest();
return;
} catch (e) {
info('The worker has been disabled.');
}
}
//#endif
// Either workers are disabled, not supported or have thrown an exception.
// Thus, we fallback to a faked worker.
this._setupFakeWorker();
},
_setupFakeWorker: function PDFWorker_setupFakeWorker() {
if (!globalScope.PDFJS.disableWorker) {
warn('Setting up fake worker.');
globalScope.PDFJS.disableWorker = true;
}
setupFakeWorkerGlobal().then(function () {
if (this.destroyed) {
this._readyCapability.reject(new Error('Worker was destroyed'));
return;
}
// If we don't use a worker, just post/sendMessage to the main thread.
var port = {
_listeners: [],
postMessage: function (obj) {
var e = {data: obj};
this._listeners.forEach(function (listener) {
listener.call(this, e);
}, this);
},
addEventListener: function (name, listener) {
this._listeners.push(listener);
},
removeEventListener: function (name, listener) {
var i = this._listeners.indexOf(listener);
this._listeners.splice(i, 1);
},
terminate: function () {}
};
this._port = port;
// All fake workers use the same port, making id unique.
var id = 'fake' + (nextFakeWorkerId++);
// If the main thread is our worker, setup the handling for the
// messages -- the main thread sends to it self.
var workerHandler = new MessageHandler(id + '_worker', id, port);
PDFJS.WorkerMessageHandler.setup(workerHandler, port);
var messageHandler = new MessageHandler(id, id + '_worker', port);
this._messageHandler = messageHandler;
this._readyCapability.resolve();
}.bind(this));
},
/**
* Destroys the worker instance.
*/
destroy: function PDFWorker_destroy() {
this.destroyed = true;
if (this._webWorker) {
// We need to terminate only web worker created resource.
this._webWorker.terminate();
this._webWorker = null;
}
this._port = null;
if (this._messageHandler) {
this._messageHandler.destroy();
this._messageHandler = null;
}
}
};
return PDFWorker;
})();
PDFJS.PDFWorker = PDFWorker;
/**
* For internal use only.
* @ignore
*/
var WorkerTransport = (function WorkerTransportClosure() {
function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) {
this.messageHandler = messageHandler;
this.loadingTask = loadingTask;
this.pdfDataRangeTransport = pdfDataRangeTransport;
this.commonObjs = new PDFObjects();
this.fontLoader = new FontLoader(loadingTask.docId);
this.destroyed = false;
this.destroyCapability = null;
this.pageCache = [];
this.pagePromises = [];
this.downloadInfoCapability = createPromiseCapability();
this.setupMessageHandler();
}
WorkerTransport.prototype = {
destroy: function WorkerTransport_destroy() {
if (this.destroyCapability) {
return this.destroyCapability.promise;
}
this.destroyed = true;
this.destroyCapability = createPromiseCapability();
var waitOn = [];
// We need to wait for all renderings to be completed, e.g.
// timeout/rAF can take a long time.
this.pageCache.forEach(function (page) {
if (page) {
waitOn.push(page._destroy());
}
});
this.pageCache = [];
this.pagePromises = [];
var self = this;
// We also need to wait for the worker to finish its long running tasks.
var terminated = this.messageHandler.sendWithPromise('Terminate', null);
waitOn.push(terminated);
Promise.all(waitOn).then(function () {
self.fontLoader.clear();
if (self.pdfDataRangeTransport) {
self.pdfDataRangeTransport.abort();
self.pdfDataRangeTransport = null;
}
if (self.messageHandler) {
self.messageHandler.destroy();
self.messageHandler = null;
}
self.destroyCapability.resolve();
}, this.destroyCapability.reject);
return this.destroyCapability.promise;
},
setupMessageHandler:
function WorkerTransport_setupMessageHandler() {
var messageHandler = this.messageHandler;
function updatePassword(password) {
messageHandler.send('UpdatePassword', password);
}
var pdfDataRangeTransport = this.pdfDataRangeTransport;
if (pdfDataRangeTransport) {
pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
messageHandler.send('OnDataRange', {
begin: begin,
chunk: chunk
});
});
pdfDataRangeTransport.addProgressListener(function(loaded) {
messageHandler.send('OnDataProgress', {
loaded: loaded
});
});
pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
messageHandler.send('OnDataRange', {
chunk: chunk
});
});
messageHandler.on('RequestDataRange',
function transportDataRange(data) {
pdfDataRangeTransport.requestDataRange(data.begin, data.end);
}, this);
}
messageHandler.on('GetDoc', function transportDoc(data) {
var pdfInfo = data.pdfInfo;
this.numPages = data.pdfInfo.numPages;
var loadingTask = this.loadingTask;
var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
this.pdfDocument = pdfDocument;
loadingTask._capability.resolve(pdfDocument);
}, this);
messageHandler.on('NeedPassword',
function transportNeedPassword(exception) {
var loadingTask = this.loadingTask;
if (loadingTask.onPassword) {
return loadingTask.onPassword(updatePassword,
PasswordResponses.NEED_PASSWORD);
}
loadingTask._capability.reject(
new PasswordException(exception.message, exception.code));
}, this);
messageHandler.on('IncorrectPassword',
function transportIncorrectPassword(exception) {
var loadingTask = this.loadingTask;
if (loadingTask.onPassword) {
return loadingTask.onPassword(updatePassword,
PasswordResponses.INCORRECT_PASSWORD);
}
loadingTask._capability.reject(
new PasswordException(exception.message, exception.code));
}, this);
messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
this.loadingTask._capability.reject(
new InvalidPDFException(exception.message));
}, this);
messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
this.loadingTask._capability.reject(
new MissingPDFException(exception.message));
}, this);
messageHandler.on('UnexpectedResponse',
function transportUnexpectedResponse(exception) {
this.loadingTask._capability.reject(
new UnexpectedResponseException(exception.message, exception.status));
}, this);
messageHandler.on('UnknownError',
function transportUnknownError(exception) {
this.loadingTask._capability.reject(
new UnknownErrorException(exception.message, exception.details));
}, this);
messageHandler.on('DataLoaded', function transportPage(data) {
this.downloadInfoCapability.resolve(data);
}, this);
messageHandler.on('PDFManagerReady', function transportPage(data) {
if (this.pdfDataRangeTransport) {
this.pdfDataRangeTransport.transportReady();
}
}, this);
messageHandler.on('StartRenderPage', function transportRender(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var page = this.pageCache[data.pageIndex];
page.stats.timeEnd('Page Request');
page._startRenderPage(data.transparency, data.intent);
}, this);
messageHandler.on('RenderPageChunk', function transportRender(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var page = this.pageCache[data.pageIndex];
page._renderPageChunk(data.operatorList, data.intent);
}, this);
messageHandler.on('commonobj', function transportObj(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var id = data[0];
var type = data[1];
if (this.commonObjs.hasData(id)) {
return;
}
switch (type) {
case 'Font':
var exportedData = data[2];
var font;
if ('error' in exportedData) {
var error = exportedData.error;
warn('Error during font loading: ' + error);
this.commonObjs.resolve(id, error);
break;
} else {
font = new FontFaceObject(exportedData);
}
this.fontLoader.bind(
[font],
function fontReady(fontObjs) {
this.commonObjs.resolve(id, font);
}.bind(this)
);
break;
case 'FontPath':
this.commonObjs.resolve(id, data[2]);
break;
default:
error('Got unknown common object type ' + type);
}
}, this);
messageHandler.on('obj', function transportObj(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var id = data[0];
var pageIndex = data[1];
var type = data[2];
var pageProxy = this.pageCache[pageIndex];
var imageData;
if (pageProxy.objs.hasData(id)) {
return;
}
switch (type) {
case 'JpegStream':
imageData = data[3];
loadJpegStream(id, imageData, pageProxy.objs);
break;
case 'Image':
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 (imageData && '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) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var loadingTask = this.loadingTask;
if (loadingTask.onProgress) {
loadingTask.onProgress({
loaded: data.loaded,
total: data.total
});
}
}, this);
messageHandler.on('PageError', function transportError(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var page = this.pageCache[data.pageNum - 1];
var intentState = page.intentStates[data.intent];
if (intentState.displayReadyCapability) {
intentState.displayReadyCapability.reject(data.error);
} else {
error(data.error);
}
}, this);
messageHandler.on('UnsupportedFeature',
function transportUnsupportedFeature(data) {
if (this.destroyed) {
return; // Ignore any pending requests if the worker was terminated.
}
var featureId = data.featureId;
var loadingTask = this.loadingTask;
if (loadingTask.onUnsupportedFeature) {
loadingTask.onUnsupportedFeature(featureId);
}
PDFJS.UnsupportedManager.notify(featureId);
}, this);
messageHandler.on('JpegDecode', function(data) {
if (this.destroyed) {
return Promise.reject('Worker was terminated');
}
var imageUrl = data[0];
var components = data[1];
if (components !== 3 && components !== 1) {
return Promise.reject(
new Error('Only 3 components or 1 component can be returned'));
}
return new Promise(function (resolve, reject) {
var img = new Image();
img.onload = function () {
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;
var i, j;
if (components === 3) {
for (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 (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
buf[j] = data[i];
}
}
resolve({ data: buf, width: width, height: height});
};
img.onerror = function () {
reject(new Error('JpegDecode failed to load image'));
};
img.src = imageUrl;
});
}, this);
},
getData: function WorkerTransport_getData() {
return this.messageHandler.sendWithPromise('GetData', null);
},
getPage: function WorkerTransport_getPage(pageNumber, capability) {
if (pageNumber <= 0 || pageNumber > this.numPages ||
(pageNumber|0) !== pageNumber) {
return Promise.reject(new Error('Invalid page request'));
}
var pageIndex = pageNumber - 1;
if (pageIndex in this.pagePromises) {
return this.pagePromises[pageIndex];
}
var promise = this.messageHandler.sendWithPromise('GetPage', {
pageIndex: pageIndex
}).then(function (pageInfo) {
if (this.destroyed) {
throw new Error('Transport destroyed');
}
var page = new PDFPageProxy(pageIndex, pageInfo, this);
this.pageCache[pageIndex] = page;
return page;
}.bind(this));
this.pagePromises[pageIndex] = promise;
return promise;
},
getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref });
},
getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
return this.messageHandler.sendWithPromise('GetAnnotations', {
pageIndex: pageIndex,
intent: intent,
});
},
getDestinations: function WorkerTransport_getDestinations() {
return this.messageHandler.sendWithPromise('GetDestinations', null);
},
getDestination: function WorkerTransport_getDestination(id) {
return this.messageHandler.sendWithPromise('GetDestination', { id: id });
},
getAttachments: function WorkerTransport_getAttachments() {
return this.messageHandler.sendWithPromise('GetAttachments', null);
},
getJavaScript: function WorkerTransport_getJavaScript() {
return this.messageHandler.sendWithPromise('GetJavaScript', null);
},
getOutline: function WorkerTransport_getOutline() {
return this.messageHandler.sendWithPromise('GetOutline', null);
},
getMetadata: function WorkerTransport_getMetadata() {
return this.messageHandler.sendWithPromise('GetMetadata', null).
then(function transportMetadata(results) {
return {
info: results[0],
metadata: (results[1] ? new Metadata(results[1]) : null)
};
});
},
getStats: function WorkerTransport_getStats() {
return this.messageHandler.sendWithPromise('GetStats', null);
},
startCleanup: function WorkerTransport_startCleanup() {
this.messageHandler.sendWithPromise('Cleanup', null).
then(function endCleanup() {
for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
var page = this.pageCache[i];
if (page) {
page.cleanup();
}
}
this.commonObjs.clear();
this.fontLoader.clear();
}.bind(this));
}
};
return WorkerTransport;
})();
/**
* A PDF document and page is built of many objects. E.g. there are objects
* for fonts, images, rendering code and such. These objects might get processed
* inside of a worker. The `PDFObjects` implements some basic functions to
* manage these objects.
* @ignore
*/
var PDFObjects = (function PDFObjectsClosure() {
function PDFObjects() {
this.objs = {};
}
PDFObjects.prototype = {
/**
* Internal function.
* Ensures there is an object defined for `objId`.
*/
ensureObj: function PDFObjects_ensureObj(objId) {
if (this.objs[objId]) {
return this.objs[objId];
}
var obj = {
capability: createPromiseCapability(),
data: null,
resolved: false
};
this.objs[objId] = obj;
return obj;
},
/**
* If called *without* callback, this returns the data of `objId` but the
* object needs to be resolved. If it isn't, this function throws.
*
* If called *with* a callback, the callback is called with the data of the
* object once the object is resolved. That means, if you call this
* function and the object is already resolved, the callback gets called
* right away.
*/
get: function PDFObjects_get(objId, callback) {
// If there is a callback, then the get can be async and the object is
// not required to be resolved right now
if (callback) {
this.ensureObj(objId).capability.promise.then(callback);
return null;
}
// If there isn't a callback, the user expects to get the resolved data
// directly.
var obj = this.objs[objId];
// If there isn't an object yet or the object isn't resolved, then the
// data isn't ready yet!
if (!obj || !obj.resolved) {
error('Requesting object that isn\'t resolved yet ' + objId);
}
return obj.data;
},
/**
* Resolves the object `objId` with optional `data`.
*/
resolve: function PDFObjects_resolve(objId, data) {
var obj = this.ensureObj(objId);
obj.resolved = true;
obj.data = data;
obj.capability.resolve(data);
},
isResolved: function PDFObjects_isResolved(objId) {
var objs = this.objs;
if (!objs[objId]) {
return false;
} else {
return objs[objId].resolved;
}
},
hasData: function PDFObjects_hasData(objId) {
return this.isResolved(objId);
},
/**
* Returns the data of `objId` if object exists, null otherwise.
*/
getData: function PDFObjects_getData(objId) {
var objs = this.objs;
if (!objs[objId] || !objs[objId].resolved) {
return null;
} else {
return objs[objId].data;
}
},
clear: function PDFObjects_clear() {
this.objs = {};
}
};
return PDFObjects;
})();
/**
* Allows controlling of the rendering tasks.
* @class
* @alias RenderTask
*/
var RenderTask = (function RenderTaskClosure() {
function RenderTask(internalRenderTask) {
this._internalRenderTask = internalRenderTask;
/**
* Callback for incremental rendering -- 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.
* @type {function}
*/
this.onContinue = null;
}
RenderTask.prototype = /** @lends RenderTask.prototype */ {
/**
* Promise for rendering task completion.
* @return {Promise}
*/
get promise() {
return this._internalRenderTask.capability.promise;
},
/**
* Cancels the rendering task. If the task is currently rendering it will
* not be cancelled until graphics pauses with a timeout. The promise that
* this object extends will resolved when cancelled.
*/
cancel: function RenderTask_cancel() {
this._internalRenderTask.cancel();
},
/**
* Registers callbacks to indicate the rendering task completion.
*
* @param {function} onFulfilled The callback for the rendering completion.
* @param {function} onRejected The callback for the rendering failure.
* @return {Promise} A promise that is resolved after the onFulfilled or
* onRejected callback.
*/
then: function RenderTask_then(onFulfilled, onRejected) {
return this.promise.then.apply(this.promise, arguments);
}
};
return RenderTask;
})();
/**
* For internal use only.
* @ignore
*/
var InternalRenderTask = (function InternalRenderTaskClosure() {
function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
pageNumber) {
this.callback = callback;
this.params = params;
this.objs = objs;
this.commonObjs = commonObjs;
this.operatorListIdx = null;
this.operatorList = operatorList;
this.pageNumber = pageNumber;
this.running = false;
this.graphicsReadyCallback = null;
this.graphicsReady = false;
this.useRequestAnimationFrame = false;
this.cancelled = false;
this.capability = createPromiseCapability();
this.task = new RenderTask(this);
// caching this-bound methods
this._continueBound = this._continue.bind(this);
this._scheduleNextBound = this._scheduleNext.bind(this);
this._nextBound = this._next.bind(this);
}
InternalRenderTask.prototype = {
initalizeGraphics:
function InternalRenderTask_initalizeGraphics(transparency) {
if (this.cancelled) {
return;
}
if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
globalScope.StepperManager.enabled) {
this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
this.stepper.init(this.operatorList);
this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
}
var params = this.params;
this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
this.objs, params.imageLayer);
this.gfx.beginDrawing(params.transform, params.viewport, transparency);
this.operatorListIdx = 0;
this.graphicsReady = true;
if (this.graphicsReadyCallback) {
this.graphicsReadyCallback();
}
},
cancel: function InternalRenderTask_cancel() {
this.running = false;
this.cancelled = true;
this.callback('cancelled');
},
operatorListChanged: function InternalRenderTask_operatorListChanged() {
if (!this.graphicsReady) {
if (!this.graphicsReadyCallback) {
this.graphicsReadyCallback = this._continueBound;
}
return;
}
if (this.stepper) {
this.stepper.updateOperatorList(this.operatorList);
}
if (this.running) {
return;
}
this._continue();
},
_continue: function InternalRenderTask__continue() {
this.running = true;
if (this.cancelled) {
return;
}
if (this.task.onContinue) {
this.task.onContinue.call(this.task, this._scheduleNextBound);
} else {
this._scheduleNext();
}
},
_scheduleNext: function InternalRenderTask__scheduleNext() {
if (this.useRequestAnimationFrame) {
window.requestAnimationFrame(this._nextBound);
} else {
Promise.resolve(undefined).then(this._nextBound);
}
},
_next: function InternalRenderTask__next() {
if (this.cancelled) {
return;
}
this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
this.operatorListIdx,
this._continueBound,
this.stepper);
if (this.operatorListIdx === this.operatorList.argsArray.length) {
this.running = false;
if (this.operatorList.lastChunk) {
this.gfx.endDrawing();
this.callback();
}
}
}
};
return InternalRenderTask;
})();
/**
* (Deprecated) Global observer of unsupported feature usages. Use
* onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance.
*/
PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() {
var listeners = [];
return {
listen: function (cb) {
deprecated('Global UnsupportedManager.listen is used: ' +
' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
listeners.push(cb);
},
notify: function (featureId) {
for (var i = 0, ii = listeners.length; i < ii; i++) {
listeners[i](featureId);
}
}
};
})();
exports.getDocument = PDFJS.getDocument;
exports.PDFDataRangeTransport = PDFDataRangeTransport;
exports.PDFDocumentProxy = PDFDocumentProxy;
exports.PDFPageProxy = PDFPageProxy;
}));