From 79c1c8c1d40a52946fa6bd3a80a8f301e8816c35 Mon Sep 17 00:00:00 2001 From: Yury Delendik Date: Mon, 22 Sep 2014 16:27:43 -0500 Subject: [PATCH] PDF.js version 1.0.393 --- bower.json | 2 +- build/pdf.combined.js | 11323 ++++++++++++++++++++-------------------- build/pdf.js | 1051 +--- build/pdf.worker.js | 6503 +++++++++++------------ package.json | 2 +- 5 files changed, 8989 insertions(+), 9892 deletions(-) diff --git a/bower.json b/bower.json index 9972bae45..85308cb68 100644 --- a/bower.json +++ b/bower.json @@ -1,6 +1,6 @@ { "name": "pdfjs-dist", - "version": "1.0.391", + "version": "1.0.393", "keywords": [ "Mozilla", "pdf", diff --git a/build/pdf.combined.js b/build/pdf.combined.js index 49fdc9c80..4f1462177 100644 --- a/build/pdf.combined.js +++ b/build/pdf.combined.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { (typeof window !== 'undefined' ? window : this).PDFJS = {}; } -PDFJS.version = '1.0.391'; -PDFJS.build = '011eb84'; +PDFJS.version = '1.0.393'; +PDFJS.build = '2282c98'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -74,6 +74,12 @@ var ImageKind = { RGBA_32BPP: 3 }; +var AnnotationType = { + WIDGET: 1, + TEXT: 2, + LINK: 3 +}; + var StreamType = { UNKNOWN: 0, FLATE: 1, @@ -1582,3130 +1588,3101 @@ function loadJpegStream(id, imageUrl, objs) { } -var DEFAULT_ICON_SIZE = 22; // px -var HIGHLIGHT_OFFSET = 4; // px -var SUPPORTED_TYPES = ['Link', 'Text', 'Widget']; - -var Annotation = (function AnnotationClosure() { - // 12.5.5: Algorithm: Appearance streams - function getTransformMatrix(rect, bbox, matrix) { - var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix); - var minX = bounds[0]; - var minY = bounds[1]; - var maxX = bounds[2]; - var maxY = bounds[3]; - - if (minX === maxX || minY === maxY) { - // From real-life file, bbox was [0, 0, 0, 0]. In this case, - // just apply the transform for rect - return [1, 0, 0, 1, rect[0], rect[1]]; - } +/** + * 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); - var xRatio = (rect[2] - rect[0]) / (maxX - minX); - var yRatio = (rect[3] - rect[1]) / (maxY - minY); - return [ - xRatio, - 0, - 0, - yRatio, - rect[0] - minX * xRatio, - rect[1] - minY * yRatio - ]; - } +/** + * The url of where the predefined Adobe CMaps are located. Include trailing + * slash. + * @var {string} + */ +PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); - function getDefaultAppearance(dict) { - var appearanceState = dict.get('AP'); - if (!isDict(appearanceState)) { - return; - } +/** + * Specifies if CMaps are binary packed. + * @var {boolean} + */ +PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; - var appearance; - var appearances = appearanceState.get('N'); - if (isDict(appearances)) { - var as = dict.get('AS'); - if (as && appearances.has(as.name)) { - appearance = appearances.get(as.name); - } - } else { - appearance = appearances; - } - return appearance; - } +/* + * 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); - function Annotation(params) { - if (params.data) { - this.data = params.data; - return; - } +/** + * Path for image resources, mainly for annotation icons. Include trailing + * slash. + * @var {string} + */ +PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? + '' : PDFJS.imageResourcesPath); - var dict = params.dict; - var data = this.data = {}; +/** + * 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); - data.subtype = dict.get('Subtype').name; - var rect = dict.get('Rect') || [0, 0, 0, 0]; - data.rect = Util.normalizeRect(rect); - data.annotationFlags = dict.get('F'); +/** + * 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. + * @var {string} + */ +PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); - var color = dict.get('C'); - if (isArray(color) && color.length === 3) { - // TODO(mack): currently only supporting rgb; need support different - // colorspaces - data.color = color; - } else { - data.color = [0, 0, 0]; - } +/** + * 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); - // Some types of annotations have border style dict which has more - // info than the border array - if (dict.has('BS')) { - var borderStyle = dict.get('BS'); - data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1; - } else { - var borderArray = dict.get('Border') || [0, 0, 1]; - data.borderWidth = borderArray[2] || 0; +/** + * 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. + * @var {boolean} + */ +PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? + false : PDFJS.disableAutoFetch); - // TODO: implement proper support for annotations with line dash patterns. - var dashArray = borderArray[3]; - if (data.borderWidth > 0 && dashArray) { - if (!isArray(dashArray)) { - // Ignore the border if dashArray is not actually an array, - // this is consistent with the behaviour in Adobe Reader. - data.borderWidth = 0; - } else { - var dashArrayLength = dashArray.length; - if (dashArrayLength > 0) { - // According to the PDF specification: the elements in a dashArray - // shall be numbers that are nonnegative and not all equal to zero. - var isInvalid = false; - var numPositive = 0; - for (var i = 0; i < dashArrayLength; i++) { - var validNumber = (+dashArray[i] >= 0); - if (!validNumber) { - isInvalid = true; - break; - } else if (dashArray[i] > 0) { - numPositive++; - } - } - if (isInvalid || numPositive === 0) { - data.borderWidth = 0; - } - } - } - } - } +/** + * Enables special hooks for debugging PDF.js. + * @var {boolean} + */ +PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); - this.appearance = getDefaultAppearance(dict); - data.hasAppearance = !!this.appearance; - data.id = params.ref.num; - } +/** + * Enables transfer usage in postMessage for ArrayBuffers. + * @var {boolean} + */ +PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? + true : PDFJS.postMessageTransfers); - Annotation.prototype = { +/** + * Disables URL.createObjectURL usage. + * @var {boolean} + */ +PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? + false : PDFJS.disableCreateObjectURL); - getData: function Annotation_getData() { - return this.data; - }, +/** + * Disables WebGL usage. + * @var {boolean} + */ +PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? + true : PDFJS.disableWebGL); - hasHtml: function Annotation_hasHtml() { - return false; - }, +/** + * Enables CSS only zooming. + * @var {boolean} + */ +PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? + false : PDFJS.useOnlyCssZoom); - getHtmlElement: function Annotation_getHtmlElement(commonObjs) { - throw new NotImplementedException( - 'getHtmlElement() should be implemented in subclass'); - }, +/** + * 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); - // TODO(mack): Remove this, it's not really that helpful. - getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect, - borderWidth) { - assert(!isWorker, - 'getEmptyContainer() should be called from main thread'); +/** + * 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); - var bWidth = borderWidth || 0; +/** + * Document initialization / loading parameters object. + * + * @typedef {Object} DocumentInitParameters + * @property {string} url - The URL of the PDF. + * @property {TypedArray} data - A typed array with PDF data. + * @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. + */ - rect = rect || this.data.rect; - var element = document.createElement(tagName); - element.style.borderWidth = bWidth + 'px'; - var width = rect[2] - rect[0] - 2 * bWidth; - var height = rect[3] - rect[1] - 2 * bWidth; - element.style.width = width + 'px'; - element.style.height = height + 'px'; - return element; - }, +/** + * @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). + */ - isInvisible: function Annotation_isInvisible() { - var data = this.data; - if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) { - return false; - } else { - return !!(data && - data.annotationFlags && // Default: not invisible - data.annotationFlags & 0x1); // Invisible - } - }, - - isViewable: function Annotation_isViewable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - (!data.annotationFlags || - !(data.annotationFlags & 0x22)) && // Hidden or NoView - data.rect); // rectangle is necessary - }, - - isPrintable: function Annotation_isPrintable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - data.annotationFlags && // Default: not printable - data.annotationFlags & 0x4 && // Print - !(data.annotationFlags & 0x2) && // Hidden - data.rect); // rectangle is necessary - }, - - loadResources: function Annotation_loadResources(keys) { - return new Promise(function (resolve, reject) { - this.appearance.dict.getAsync('Resources').then(function (resources) { - if (!resources) { - resolve(); - return; - } - var objectLoader = new ObjectLoader(resources.map, - keys, - resources.xref); - objectLoader.load().then(function() { - resolve(resources); - }, reject); - }, reject); - }.bind(this)); - }, - - getOperatorList: function Annotation_getOperatorList(evaluator) { - - if (!this.appearance) { - return Promise.resolve(new OperatorList()); - } +/** + * 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} source Can be a url to + * where a PDF is located, a typed array (Uint8Array) already populated with + * data or parameter object. + * + * @param {Object} pdfDataRangeTransport is optional. It is used if you want + * to manually serve range requests for data in the PDF. See viewer.js for + * an example of pdfDataRangeTransport's interface. + * + * @param {function} passwordCallback is optional. 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}). + * + * @return {Promise} A promise that is resolved with {@link PDFDocumentProxy} + * object. + */ +PDFJS.getDocument = function getDocument(source, + pdfDataRangeTransport, + passwordCallback, + progressCallback) { + var workerInitializedCapability, workerReadyCapability, transport; - var data = this.data; + 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'); + } - var appearanceDict = this.appearance.dict; - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'ColorSpace', - 'Pattern', - 'Shading', - 'XObject', - 'Font' - // ProcSet - // Properties - ]); - var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1]; - var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0]; - var transform = getTransformMatrix(data.rect, bbox, matrix); - var self = this; + if (!source.url && !source.data) { + error('Invalid parameter array, need either .data or .url'); + } - return resourcesPromise.then(function(resources) { - var opList = new OperatorList(); - opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]); - return evaluator.getOperatorList(self.appearance, resources, opList). - then(function () { - opList.addOp(OPS.endAnnotation, []); - self.appearance.reset(); - return opList; - }); - }); + // 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]; + } - Annotation.getConstructor = - function Annotation_getConstructor(subtype, fieldType) { + workerInitializedCapability = createPromiseCapability(); + workerReadyCapability = createPromiseCapability(); + transport = new WorkerTransport(workerInitializedCapability, + workerReadyCapability, pdfDataRangeTransport, + progressCallback); + workerInitializedCapability.promise.then(function transportInitialized() { + transport.passwordCallback = passwordCallback; + transport.fetchDocument(params); + }); + return workerReadyCapability.promise; +}; - if (!subtype) { - return; +/** + * Proxy to a PDFDocument in the worker thread. Also, contains commonly used + * properties that can be read synchronously. + * @class + */ +var PDFDocumentProxy = (function PDFDocumentProxyClosure() { + function PDFDocumentProxy(pdfInfo, transport) { + this.pdfInfo = pdfInfo; + this.transport = transport; + } + 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. + */ + getDestinations: function PDFDocumentProxy_getDestinations() { + return this.transport.getDestinations(); + }, + /** + * @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; + }, + /** + * @returns {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() { + this.transport.destroy(); } + }; + return PDFDocumentProxy; +})(); - // TODO(mack): Implement FreeText annotations - if (subtype === 'Link') { - return LinkAnnotation; - } else if (subtype === 'Text') { - return TextAnnotation; - } else if (subtype === 'Widget') { - if (!fieldType) { - return; - } - - if (fieldType === 'Tx') { - return TextWidgetAnnotation; - } else { - return WidgetAnnotation; - } - } else { - return Annotation; - } - }; - - // TODO(mack): Support loading annotation from data - Annotation.fromData = function Annotation_fromData(data) { - var subtype = data.subtype; - var fieldType = data.fieldType; - var Constructor = Annotation.getConstructor(subtype, fieldType); - if (Constructor) { - return new Constructor({ data: data }); - } - }; +/** + * Page text content. + * + * @typedef {Object} TextContent + * @property {array} items - array of {@link TextItem} + * @property {Object} styles - {@link TextStyles} objects, indexed by font + * name. + */ - Annotation.fromRef = function Annotation_fromRef(xref, ref) { +/** + * 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. + */ - var dict = xref.fetchIfRef(ref); - if (!isDict(dict)) { - return; - } +/** + * 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 + */ - var subtype = dict.get('Subtype'); - subtype = isName(subtype) ? subtype.name : ''; - if (!subtype) { - return; - } +/** + * 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 {Object} imageLayer - (optional) An object that has beginLayout, + * endLayout and appendImage functions. + * @property {function} 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. + */ + +/** + * 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. + */ - var fieldType = Util.getInheritableProperty(dict, 'FT'); - fieldType = isName(fieldType) ? fieldType.name : ''; +/** + * Proxy to a PDFPage in the worker thread. + * @class + */ +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.pendingDestroy = false; + this.intentStates = {}; + } + 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); + }, + /** + * @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 Constructor = Annotation.getConstructor(subtype, fieldType); - if (!Constructor) { - return; - } + var promise = this.transport.getAnnotations(this.pageIndex); + this.annotationsPromise = promise; + return promise; + }, + /** + * 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'); - var params = { - dict: dict, - ref: ref, - }; + // If there was a pending destroy cancel it so no cleanup happens during + // this call to render. + this.pendingDestroy = false; - var annotation = new Constructor(params); + var renderingIntent = ('intent' in params ? + (params.intent == 'print' ? 'print' : 'display') : 'display'); - if (annotation.isViewable() || annotation.isPrintable()) { - return annotation; - } else { - if (SUPPORTED_TYPES.indexOf(subtype) === -1) { - warn('unimplemented annotation type: ' + subtype); + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; } - } - }; - - Annotation.appendToOperatorList = function Annotation_appendToOperatorList( - annotations, opList, pdfManager, partialEvaluator, intent) { - - function reject(e) { - annotationsReadyCapability.reject(e); - } + var intentState = this.intentStates[renderingIntent]; - var annotationsReadyCapability = createPromiseCapability(); + // 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 + }; - var annotationPromises = []; - for (var i = 0, n = annotations.length; i < n; ++i) { - if (intent === 'display' && annotations[i].isViewable() || - intent === 'print' && annotations[i].isPrintable()) { - annotationPromises.push( - annotations[i].getOperatorList(partialEvaluator)); + this.stats.time('Page Request'); + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageNumber - 1, + intent: renderingIntent + }); } - } - Promise.all(annotationPromises).then(function(datas) { - opList.addOp(OPS.beginAnnotations, []); - for (var i = 0, n = datas.length; i < n; ++i) { - var annotOpList = datas[i]; - opList.addOpList(annotOpList); + + var internalRenderTask = new InternalRenderTask(complete, params, + this.objs, + this.commonObjs, + intentState.operatorList, + this.pageNumber); + if (!intentState.renderTasks) { + intentState.renderTasks = []; } - opList.addOp(OPS.endAnnotations, []); - annotationsReadyCapability.resolve(); - }, reject); + intentState.renderTasks.push(internalRenderTask); + var renderTask = new RenderTask(internalRenderTask); - return annotationsReadyCapability.promise; - }; + var self = this; + intentState.displayReadyCapability.promise.then( + function pageDisplayReadyPromise(transparency) { + if (self.pendingDestroy) { + complete(); + return; + } + stats.time('Rendering'); + internalRenderTask.initalizeGraphics(transparency); + internalRenderTask.operatorListChanged(); + }, + function pageDisplayReadPromiseError(reason) { + complete(reason); + } + ); - return Annotation; -})(); -PDFJS.Annotation = Annotation; - - -var WidgetAnnotation = (function WidgetAnnotationClosure() { - - function WidgetAnnotation(params) { - Annotation.call(this, params); + function complete(error) { + var i = intentState.renderTasks.indexOf(internalRenderTask); + if (i >= 0) { + intentState.renderTasks.splice(i, 1); + } - if (params.data) { - return; - } + if (self.cleanupAfterRender) { + self.pendingDestroy = true; + } + self._tryDestroy(); - var dict = params.dict; - var data = this.data; + if (error) { + internalRenderTask.capability.reject(error); + } else { + internalRenderTask.capability.resolve(); + } + stats.timeEnd('Rendering'); + stats.timeEnd('Overall'); + } - data.fieldValue = stringToPDFString( - Util.getInheritableProperty(dict, 'V') || ''); - data.alternativeText = stringToPDFString(dict.get('TU') || ''); - data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || ''; - var fieldType = Util.getInheritableProperty(dict, 'FT'); - data.fieldType = isName(fieldType) ? fieldType.name : ''; - data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0; - this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty; + return renderTask; + }, - // Building the full field name by collecting the field and - // its ancestors 'T' data and joining them using '.'. - var fieldName = []; - var namedItem = dict; - var ref = params.ref; - while (namedItem) { - var parent = namedItem.get('Parent'); - var parentRef = namedItem.getRaw('Parent'); - var name = namedItem.get('T'); - if (name) { - fieldName.unshift(stringToPDFString(name)); - } else { - // The field name is absent, that means more than one field - // with the same name may exist. Replacing the empty name - // with the '`' plus index in the parent's 'Kids' array. - // This is not in the PDF spec but necessary to id the - // the input controls. - var kids = parent.get('Kids'); - var j, jj; - for (j = 0, jj = kids.length; j < jj; j++) { - var kidRef = kids[j]; - if (kidRef.num == ref.num && kidRef.gen == ref.gen) { - break; - } + /** + * @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); } - fieldName.unshift('`' + j); } - namedItem = parent; - ref = parentRef; - } - data.fullName = fieldName.join('.'); - } - var parent = Annotation.prototype; - Util.inherit(WidgetAnnotation, Annotation, { - isViewable: function WidgetAnnotation_isViewable() { - if (this.data.fieldType === 'Sig') { - warn('unimplemented annotation type: Widget signature'); - return false; + var renderingIntent = 'oplist'; + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; } + var intentState = this.intentStates[renderingIntent]; - return parent.isViewable.call(this); - } - }); - - return WidgetAnnotation; -})(); - -var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() { - function TextWidgetAnnotation(params) { - WidgetAnnotation.call(this, params); - - if (params.data) { - return; - } - - this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q'); - } - - // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont() - function setTextStyles(element, item, fontObj) { - - var style = element.style; - style.fontSize = item.fontSize + 'px'; - style.direction = item.fontDirection < 0 ? 'rtl': 'ltr'; - - if (!fontObj) { - return; - } - - style.fontWeight = fontObj.black ? - (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - style.fontStyle = fontObj.italic ? 'italic' : 'normal'; - - var fontName = fontObj.loadedName; - var fontFamily = fontName ? '"' + fontName + '", ' : ''; - // Use a reasonable default font if the font doesn't specify a fallback - var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif'; - style.fontFamily = fontFamily + fallbackName; - } - + 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 + }; - Util.inherit(TextWidgetAnnotation, WidgetAnnotation, { - hasHtml: function TextWidgetAnnotation_hasHtml() { - return !this.data.hasAppearance && !!this.data.fieldValue; + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageIndex, + intent: renderingIntent + }); + } + return intentState.opListReadCapability.promise; }, - getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); - - var item = this.data; - - var element = this.getEmptyContainer('div'); - element.style.display = 'table'; - - var content = document.createElement('div'); - content.textContent = item.fieldValue; - var textAlignment = item.textAlignment; - content.style.textAlign = ['left', 'center', 'right'][textAlignment]; - content.style.verticalAlign = 'middle'; - content.style.display = 'table-cell'; - - var fontObj = item.fontRefName ? - commonObjs.getData(item.fontRefName) : null; - setTextStyles(content, item, fontObj); - - element.appendChild(content); - - return element; + /** + * @return {Promise} That is resolved a {@link TextContent} + * object that represent the page text content. + */ + getTextContent: function PDFPageProxy_getTextContent() { + return this.transport.messageHandler.sendWithPromise('GetTextContent', { + pageIndex: this.pageNumber - 1 + }); }, - - getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) { - if (this.appearance) { - return Annotation.prototype.getOperatorList.call(this, evaluator); - } - - var opList = new OperatorList(); - var data = this.data; - - // Even if there is an appearance stream, ignore it. This is the - // behaviour used by Adobe Reader. - if (!data.defaultAppearance) { - return Promise.resolve(opList); + /** + * Destroys resources allocated by the page. + */ + destroy: function PDFPageProxy_destroy() { + this.pendingDestroy = true; + this._tryDestroy(); + }, + /** + * For internal use only. Attempts to clean up if rendering is in a state + * where that's possible. + * @ignore + */ + _tryDestroy: function PDFPageProxy__destroy() { + if (!this.pendingDestroy || + Object.keys(this.intentStates).some(function(intent) { + var intentState = this.intentStates[intent]; + return (intentState.renderTasks.length !== 0 || + intentState.receivingOperatorList); + }, this)) { + return; } - var stream = new Stream(stringToBytes(data.defaultAppearance)); - return evaluator.getOperatorList(stream, this.fieldResources, opList). - then(function () { - return opList; - }); - } - }); - - return TextWidgetAnnotation; -})(); - -var InteractiveAnnotation = (function InteractiveAnnotationClosure() { - function InteractiveAnnotation(params) { - Annotation.call(this, params); - } - - Util.inherit(InteractiveAnnotation, Annotation, { - hasHtml: function InteractiveAnnotation_hasHtml() { - return true; + Object.keys(this.intentStates).forEach(function(intent) { + delete this.intentStates[intent]; + }, this); + this.objs.clear(); + this.annotationsPromise = null; + this.pendingDestroy = false; }, - - highlight: function InteractiveAnnotation_highlight() { - if (this.highlightElement && - this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.removeAttribute('hidden'); + /** + * 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); } }, - - unhighlight: function InteractiveAnnotation_unhighlight() { - if (this.highlightElement && - !this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.setAttribute('hidden', true); + /** + * 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]); } - }, - - initContainer: function InteractiveAnnotation_initContainer() { - - var item = this.data; - var rect = item.rect; - - var container = this.getEmptyContainer('section', rect, item.borderWidth); - container.style.backgroundColor = item.color; + intentState.operatorList.lastChunk = operatorListChunk.lastChunk; - var color = item.color; - var rgb = []; - for (var i = 0; i < 3; ++i) { - rgb[i] = Math.round(color[i] * 255); + // Notify all the rendering tasks there are more operators to be consumed. + for (i = 0; i < intentState.renderTasks.length; i++) { + intentState.renderTasks[i].operatorListChanged(); } - item.colorCssRgb = Util.makeCssRgb(rgb); - - var highlight = document.createElement('div'); - highlight.className = 'annotationHighlight'; - highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px'; - highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px'; - highlight.setAttribute('hidden', true); - - this.highlightElement = highlight; - container.appendChild(this.highlightElement); - return container; + if (operatorListChunk.lastChunk) { + intentState.receivingOperatorList = false; + this._tryDestroy(); + } } - }); - - return InteractiveAnnotation; + }; + return PDFPageProxy; })(); -var TextAnnotation = (function TextAnnotationClosure() { - function TextAnnotation(params) { - InteractiveAnnotation.call(this, params); +/** + * For internal use only. + * @ignore + */ +var WorkerTransport = (function WorkerTransportClosure() { + function WorkerTransport(workerInitializedCapability, workerReadyCapability, + pdfDataRangeTransport, progressCallback) { + this.pdfDataRangeTransport = pdfDataRangeTransport; - if (params.data) { - return; - } + this.workerInitializedCapability = workerInitializedCapability; + this.workerReadyCapability = workerReadyCapability; + this.progressCallback = progressCallback; + this.commonObjs = new PDFObjects(); - var dict = params.dict; - var data = this.data; + this.pageCache = []; + this.pagePromises = []; + this.downloadInfoCapability = createPromiseCapability(); + this.passwordCallback = null; - var content = dict.get('Contents'); - var title = dict.get('T'); - data.content = stringToPDFString(content || ''); - data.title = stringToPDFString(title || ''); + // 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. + // Either workers are disabled, not supported or have thrown an exception. + // Thus, we fallback to a faked worker. + this.setupFakeWorker(); + } + WorkerTransport.prototype = { + destroy: function WorkerTransport_destroy() { + this.pageCache = []; + this.pagePromises = []; + var self = this; + this.messageHandler.sendWithPromise('Terminate', null).then(function () { + FontLoader.clear(); + if (self.worker) { + self.worker.terminate(); + } + }); + }, - if (data.hasAppearance) { - data.name = 'NoIcon'; - } else { - data.rect[1] = data.rect[3] - DEFAULT_ICON_SIZE; - data.rect[2] = data.rect[0] + DEFAULT_ICON_SIZE; - data.name = dict.has('Name') ? dict.get('Name').name : 'Note'; - } + setupFakeWorker: function WorkerTransport_setupFakeWorker() { + globalScope.PDFJS.disableWorker = true; - if (dict.has('C')) { - data.hasBgColor = true; - } - } + 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. + PDFJS.fakeWorkerFilesLoadedCapability.resolve(); + } + PDFJS.fakeWorkerFilesLoadedCapability.promise.then(function () { + 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 ANNOT_MIN_SIZE = 10; + var messageHandler = new MessageHandler('main', fakeWorker); + this.setupMessageHandler(messageHandler); - Util.inherit(TextAnnotation, InteractiveAnnotation, { + // If the main thread is our worker, setup the handling for the messages + // the main thread sends to it self. + PDFJS.WorkerMessageHandler.setup(messageHandler); - getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); + this.workerInitializedCapability.resolve(); + }.bind(this)); + }, - var item = this.data; - var rect = item.rect; + setupMessageHandler: + function WorkerTransport_setupMessageHandler(messageHandler) { + this.messageHandler = messageHandler; - // sanity check because of OOo-generated PDFs - if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) { - rect[3] = rect[1] + ANNOT_MIN_SIZE; - } - if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) { - rect[2] = rect[0] + (rect[3] - rect[1]); // make it square + function updatePassword(password) { + messageHandler.send('UpdatePassword', password); } - var container = this.initContainer(); - container.className = 'annotText'; + var pdfDataRangeTransport = this.pdfDataRangeTransport; + if (pdfDataRangeTransport) { + pdfDataRangeTransport.addRangeListener(function(begin, chunk) { + messageHandler.send('OnDataRange', { + begin: begin, + chunk: chunk + }); + }); - var image = document.createElement('img'); - image.style.height = container.style.height; - image.style.width = container.style.width; - var iconName = item.name; - image.src = PDFJS.imageResourcesPath + 'annotation-' + - iconName.toLowerCase() + '.svg'; - image.alt = '[{{type}} Annotation]'; - image.dataset.l10nId = 'text_annotation_type'; - image.dataset.l10nArgs = JSON.stringify({type: iconName}); + pdfDataRangeTransport.addProgressListener(function(loaded) { + messageHandler.send('OnDataProgress', { + loaded: loaded + }); + }); - var contentWrapper = document.createElement('div'); - contentWrapper.className = 'annotTextContentWrapper'; - contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px'; - contentWrapper.style.top = '-10px'; + messageHandler.on('RequestDataRange', + function transportDataRange(data) { + pdfDataRangeTransport.requestDataRange(data.begin, data.end); + }, this); + } - var content = document.createElement('div'); - content.className = 'annotTextContent'; - content.setAttribute('hidden', true); + messageHandler.on('GetDoc', function transportDoc(data) { + var pdfInfo = data.pdfInfo; + this.numPages = data.pdfInfo.numPages; + var pdfDocument = new PDFDocumentProxy(pdfInfo, this); + this.pdfDocument = pdfDocument; + this.workerReadyCapability.resolve(pdfDocument); + }, this); - var i, ii; - if (item.hasBgColor) { - var color = item.color; - var rgb = []; - for (i = 0; i < 3; ++i) { - // Enlighten the color (70%) - var c = Math.round(color[i] * 255); - rgb[i] = Math.round((255 - c) * 0.7) + c; + messageHandler.on('NeedPassword', function transportPassword(data) { + if (this.passwordCallback) { + return this.passwordCallback(updatePassword, + PasswordResponses.NEED_PASSWORD); } - content.style.backgroundColor = Util.makeCssRgb(rgb); - } - - var title = document.createElement('h1'); - var text = document.createElement('p'); - title.textContent = item.title; + this.workerReadyCapability.reject(data.exception.message, + data.exception); + }, this); - if (!item.content && !item.title) { - content.setAttribute('hidden', true); - } else { - var e = document.createElement('span'); - var lines = item.content.split(/(?:\r\n?|\n)/); - for (i = 0, ii = lines.length; i < ii; ++i) { - var line = lines[i]; - e.appendChild(document.createTextNode(line)); - if (i < (ii - 1)) { - e.appendChild(document.createElement('br')); - } + messageHandler.on('IncorrectPassword', function transportBadPass(data) { + if (this.passwordCallback) { + return this.passwordCallback(updatePassword, + PasswordResponses.INCORRECT_PASSWORD); } - text.appendChild(e); + this.workerReadyCapability.reject(data.exception.message, + data.exception); + }, this); - var pinned = false; + messageHandler.on('InvalidPDF', function transportInvalidPDF(data) { + this.workerReadyCapability.reject(data.exception.name, data.exception); + }, this); - var showAnnotation = function showAnnotation(pin) { - if (pin) { - pinned = true; - } - if (content.hasAttribute('hidden')) { - container.style.zIndex += 1; - content.removeAttribute('hidden'); - } - }; + messageHandler.on('MissingPDF', function transportMissingPDF(data) { + this.workerReadyCapability.reject(data.exception.message, + data.exception); + }, this); - var hideAnnotation = function hideAnnotation(unpin) { - if (unpin) { - pinned = false; - } - if (!content.hasAttribute('hidden') && !pinned) { - container.style.zIndex -= 1; - content.setAttribute('hidden', true); - } - }; + messageHandler.on('UnknownError', function transportUnknownError(data) { + this.workerReadyCapability.reject(data.exception.message, + data.exception); + }, this); - var toggleAnnotation = function toggleAnnotation() { - if (pinned) { - hideAnnotation(true); - } else { - showAnnotation(true); - } - }; + messageHandler.on('DataLoaded', function transportPage(data) { + this.downloadInfoCapability.resolve(data); + }, this); - image.addEventListener('click', function image_clickHandler() { - toggleAnnotation(); - }, false); - image.addEventListener('mouseover', function image_mouseOverHandler() { - showAnnotation(); - }, false); - image.addEventListener('mouseout', function image_mouseOutHandler() { - hideAnnotation(); - }, false); - - content.addEventListener('click', function content_clickHandler() { - hideAnnotation(true); - }, false); - } + messageHandler.on('StartRenderPage', function transportRender(data) { + var page = this.pageCache[data.pageIndex]; - content.appendChild(title); - content.appendChild(text); - contentWrapper.appendChild(content); - container.appendChild(image); - container.appendChild(contentWrapper); + page.stats.timeEnd('Page Request'); + page._startRenderPage(data.transparency, data.intent); + }, this); - return container; - } - }); + messageHandler.on('RenderPageChunk', function transportRender(data) { + var page = this.pageCache[data.pageIndex]; - return TextAnnotation; -})(); + page._renderPageChunk(data.operatorList, data.intent); + }, this); -var LinkAnnotation = (function LinkAnnotationClosure() { - function LinkAnnotation(params) { - InteractiveAnnotation.call(this, params); + messageHandler.on('commonobj', function transportObj(data) { + var id = data[0]; + var type = data[1]; + if (this.commonObjs.hasData(id)) { + return; + } - if (params.data) { - return; - } + switch (type) { + case 'Font': + var exportedData = data[2]; - var dict = params.dict; - var data = this.data; + 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 FontFace(exportedData); + } - var action = dict.get('A'); - if (action) { - var linkType = action.get('S').name; - if (linkType === 'URI') { - var url = action.get('URI'); - if (isName(url)) { - // Some bad PDFs do not put parentheses around relative URLs. - url = '/' + url.name; - } else if (url) { - url = addDefaultProtocolToUrl(url); - } - // TODO: pdf spec mentions urls can be relative to a Base - // entry in the dictionary. - if (!isValidUrl(url, false)) { - url = ''; - } - data.url = url; - } else if (linkType === 'GoTo') { - data.dest = action.get('D'); - } else if (linkType === 'GoToR') { - var urlDict = action.get('F'); - if (isDict(urlDict)) { - // We assume that the 'url' is a Filspec dictionary - // and fetch the url without checking any further - url = urlDict.get('F') || ''; + 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); - // TODO: pdf reference says that GoToR - // can also have 'NewWindow' attribute - if (!isValidUrl(url, false)) { - url = ''; + messageHandler.on('obj', function transportObj(data) { + 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; } - data.url = url; - data.dest = action.get('D'); - } else if (linkType === 'Named') { - data.action = action.get('N').name; - } else { - warn('unrecognized link type: ' + linkType); - } - } else if (dict.has('Dest')) { - // simple destination link - var dest = dict.get('Dest'); - data.dest = isName(dest) ? dest.name : dest; - } - } - // Lets URLs beginning with 'www.' default to using the 'http://' protocol. - function addDefaultProtocolToUrl(url) { - if (url && url.indexOf('www.') === 0) { - return ('http://' + url); - } - return url; - } + switch (type) { + case 'JpegStream': + imageData = data[3]; + loadJpegStream(id, imageData, pageProxy.objs); + break; + case 'Image': + imageData = data[3]; + pageProxy.objs.resolve(id, imageData); - Util.inherit(LinkAnnotation, InteractiveAnnotation, { - hasOperatorList: function LinkAnnotation_hasOperatorList() { - return false; - }, + // 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); - getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) { + messageHandler.on('DocProgress', function transportDocProgress(data) { + if (this.progressCallback) { + this.progressCallback({ + loaded: data.loaded, + total: data.total + }); + } + }, this); - var container = this.initContainer(); - container.className = 'annotLink'; + messageHandler.on('DocError', function transportDocError(data) { + this.workerReadyCapability.reject(data); + }, this); - var item = this.data; + messageHandler.on('PageError', function transportError(data) { + var page = this.pageCache[data.pageNum - 1]; + var intentState = page.intentStates[data.intent]; + if (intentState.displayReadyCapability.promise) { + intentState.displayReadyCapability.reject(data.error); + } else { + error(data.error); + } + }, this); - container.style.borderColor = item.colorCssRgb; - container.style.borderStyle = 'solid'; + messageHandler.on('JpegDecode', function(data) { + 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')); + } - var link = document.createElement('a'); - link.href = link.title = this.data.url || ''; + 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; - container.appendChild(link); + 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; + }); + }); + }, - return container; - } - }); + fetchDocument: function WorkerTransport_fetchDocument(source) { + source.disableAutoFetch = PDFJS.disableAutoFetch; + source.chunkedViewerLoading = !!this.pdfDataRangeTransport; + this.messageHandler.send('GetDocRequest', { + source: source, + disableRange: PDFJS.disableRange, + maxImageSize: PDFJS.maxImageSize, + cMapUrl: PDFJS.cMapUrl, + cMapPacked: PDFJS.cMapPacked, + disableFontFace: PDFJS.disableFontFace, + disableCreateObjectURL: PDFJS.disableCreateObjectURL, + verbosity: PDFJS.verbosity + }); + }, - return LinkAnnotation; -})(); + 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')); + } -/** - * 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); + var pageIndex = pageNumber - 1; + if (pageIndex in this.pagePromises) { + return this.pagePromises[pageIndex]; + } + var promise = this.messageHandler.sendWithPromise('GetPage', { + pageIndex: pageIndex + }).then(function (pageInfo) { + var page = new PDFPageProxy(pageIndex, pageInfo, this); + this.pageCache[pageIndex] = page; + return page; + }.bind(this)); + this.pagePromises[pageIndex] = promise; + return promise; + }, -/** - * The url of where the predefined Adobe CMaps are located. Include trailing - * slash. - * @var {string} - */ -PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); + getPageIndex: function WorkerTransport_getPageIndexByRef(ref) { + return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }); + }, -/** - * Specifies if CMaps are binary packed. - * @var {boolean} - */ -PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; + getAnnotations: function WorkerTransport_getAnnotations(pageIndex) { + return this.messageHandler.sendWithPromise('GetAnnotations', + { pageIndex: pageIndex }); + }, -/* - * 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); + getDestinations: function WorkerTransport_getDestinations() { + return this.messageHandler.sendWithPromise('GetDestinations', null); + }, -/** - * Path for image resources, mainly for annotation icons. Include trailing - * slash. - * @var {string} - */ -PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? - '' : PDFJS.imageResourcesPath); + getAttachments: function WorkerTransport_getAttachments() { + return this.messageHandler.sendWithPromise('GetAttachments', null); + }, -/** - * 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); + getJavaScript: function WorkerTransport_getJavaScript() { + return this.messageHandler.sendWithPromise('GetJavaScript', null); + }, -/** - * 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. - * @var {string} - */ -PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); + getOutline: function WorkerTransport_getOutline() { + return this.messageHandler.sendWithPromise('GetOutline', null); + }, -/** - * 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); + getMetadata: function WorkerTransport_getMetadata() { + return this.messageHandler.sendWithPromise('GetMetadata', null). + then(function transportMetadata(results) { + return { + info: results[0], + metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) + }; + }); + }, -/** - * 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. - * @var {boolean} - */ -PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? - false : PDFJS.disableAutoFetch); + getStats: function WorkerTransport_getStats() { + return this.messageHandler.sendWithPromise('GetStats', null); + }, -/** - * Enables special hooks for debugging PDF.js. - * @var {boolean} - */ -PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); + 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.destroy(); + } + } + this.commonObjs.clear(); + FontLoader.clear(); + }.bind(this)); + } + }; + return WorkerTransport; -/** - * Enables transfer usage in postMessage for ArrayBuffers. - * @var {boolean} - */ -PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? - true : PDFJS.postMessageTransfers); +})(); /** - * Disables URL.createObjectURL usage. - * @var {boolean} + * 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 */ -PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? - false : PDFJS.disableCreateObjectURL); +var PDFObjects = (function PDFObjectsClosure() { + function PDFObjects() { + this.objs = {}; + } -/** - * Disables WebGL usage. - * @var {boolean} - */ -PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? - true : PDFJS.disableWebGL); + 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]; + } -/** - * Enables CSS only zooming. - * @var {boolean} - */ -PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? - false : PDFJS.useOnlyCssZoom); + var obj = { + capability: createPromiseCapability(), + data: null, + resolved: false + }; + this.objs[objId] = obj; -/** - * 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); + return obj; + }, -/** - * 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); + /** + * 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; + } -/** - * Document initialization / loading parameters object. - * - * @typedef {Object} DocumentInitParameters - * @property {string} url - The URL of the PDF. - * @property {TypedArray} data - A typed array with PDF data. - * @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. - */ + // If there isn't a callback, the user expects to get the resolved data + // directly. + var obj = this.objs[objId]; -/** - * @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). - */ + // 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); + } -/** - * 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} source Can be a url to - * where a PDF is located, a typed array (Uint8Array) already populated with - * data or parameter object. - * - * @param {Object} pdfDataRangeTransport is optional. It is used if you want - * to manually serve range requests for data in the PDF. See viewer.js for - * an example of pdfDataRangeTransport's interface. - * - * @param {function} passwordCallback is optional. 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}). - * - * @return {Promise} A promise that is resolved with {@link PDFDocumentProxy} - * object. - */ -PDFJS.getDocument = function getDocument(source, - pdfDataRangeTransport, - passwordCallback, - progressCallback) { - var workerInitializedCapability, workerReadyCapability, transport; + return obj.data; + }, - 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'); - } + /** + * Resolves the object `objId` with optional `data`. + */ + resolve: function PDFObjects_resolve(objId, data) { + var obj = this.ensureObj(objId); - if (!source.url && !source.data) { - error('Invalid parameter array, need either .data or .url'); - } + obj.resolved = true; + obj.data = data; + obj.capability.resolve(data); + }, - // 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]; - } + isResolved: function PDFObjects_isResolved(objId) { + var objs = this.objs; - workerInitializedCapability = createPromiseCapability(); - workerReadyCapability = createPromiseCapability(); - transport = new WorkerTransport(workerInitializedCapability, - workerReadyCapability, pdfDataRangeTransport, - progressCallback); - workerInitializedCapability.promise.then(function transportInitialized() { - transport.passwordCallback = passwordCallback; - transport.fetchDocument(params); - }); - return workerReadyCapability.promise; -}; + 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; +})(); /** - * Proxy to a PDFDocument in the worker thread. Also, contains commonly used - * properties that can be read synchronously. + * Allows controlling of the rendering tasks. * @class */ -var PDFDocumentProxy = (function PDFDocumentProxyClosure() { - function PDFDocumentProxy(pdfInfo, transport) { - this.pdfInfo = pdfInfo; - this.transport = transport; - } - PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ { +var RenderTask = (function RenderTaskClosure() { + function RenderTask(internalRenderTask) { + this.internalRenderTask = internalRenderTask; /** - * @return {number} Total number of pages the PDF contains. + * Promise for rendering task completion. + * @type {Promise} */ - get numPages() { - return this.pdfInfo.numPages; - }, + this.promise = this.internalRenderTask.capability.promise; + } + + RenderTask.prototype = /** @lends RenderTask.prototype */ { /** - * @return {string} A unique ID to identify a PDF. Not guaranteed to be - * unique. + * 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. */ - get fingerprint() { - return this.pdfInfo.fingerprint; + cancel: function RenderTask_cancel() { + this.internalRenderTask.cancel(); }, + /** - * @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. + * Registers callback 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. */ - 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. - */ - getDestinations: function PDFDocumentProxy_getDestinations() { - return this.transport.getDestinations(); - }, - /** - * @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; - }, - /** - * @returns {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() { - this.transport.destroy(); + then: function RenderTask_then(onFulfilled, onRejected) { + return this.promise.then(onFulfilled, onRejected); } }; - return PDFDocumentProxy; + + return RenderTask; })(); /** - * Page text content. - * - * @typedef {Object} TextContent - * @property {array} items - array of {@link TextItem} - * @property {Object} styles - {@link TextStyles} objects, indexed by font - * name. + * For internal use only. + * @ignore */ +var InternalRenderTask = (function InternalRenderTaskClosure() { -/** - * 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. - */ + 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.cancelled = false; + this.capability = createPromiseCapability(); + // caching this-bound methods + this._continueBound = this._continue.bind(this); + this._scheduleNextBound = this._scheduleNext.bind(this); + this._nextBound = this._next.bind(this); + } -/** - * 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 - */ + InternalRenderTask.prototype = { -/** - * 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 {Object} imageLayer - (optional) An object that has beginLayout, - * endLayout and appendImage functions. - * @property {function} 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. - */ - -/** - * 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. - */ + initalizeGraphics: + function InternalRenderTask_initalizeGraphics(transparency) { -/** - * Proxy to a PDFPage in the worker thread. - * @class - */ -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.pendingDestroy = false; - this.intentStates = {}; - } - 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; + if (this.cancelled) { + return; } - 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; + 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 promise = this.transport.getAnnotations(this.pageIndex); - this.annotationsPromise = promise; - return promise; + var params = this.params; + this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, + this.objs, params.imageLayer); + + this.gfx.beginDrawing(params.viewport, transparency); + this.operatorListIdx = 0; + this.graphicsReady = true; + if (this.graphicsReadyCallback) { + this.graphicsReadyCallback(); + } }, - /** - * 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.pendingDestroy = false; - var renderingIntent = ('intent' in params ? - (params.intent == 'print' ? 'print' : 'display') : 'display'); + cancel: function InternalRenderTask_cancel() { + this.running = false; + this.cancelled = true; + this.callback('cancelled'); + }, - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; + operatorListChanged: function InternalRenderTask_operatorListChanged() { + if (!this.graphicsReady) { + if (!this.graphicsReadyCallback) { + this.graphicsReadyCallback = this._continueBound; + } + return; } - 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 - }; + if (this.stepper) { + this.stepper.updateOperatorList(this.operatorList); + } - this.stats.time('Page Request'); - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageNumber - 1, - intent: renderingIntent - }); + if (this.running) { + return; } + this._continue(); + }, - var internalRenderTask = new InternalRenderTask(complete, params, - this.objs, - this.commonObjs, - intentState.operatorList, - this.pageNumber); - if (!intentState.renderTasks) { - intentState.renderTasks = []; + _continue: function InternalRenderTask__continue() { + this.running = true; + if (this.cancelled) { + return; } - intentState.renderTasks.push(internalRenderTask); - var renderTask = new RenderTask(internalRenderTask); + if (this.params.continueCallback) { + this.params.continueCallback(this._scheduleNextBound); + } else { + this._scheduleNext(); + } + }, - var self = this; - intentState.displayReadyCapability.promise.then( - function pageDisplayReadyPromise(transparency) { - if (self.pendingDestroy) { - complete(); - return; - } - stats.time('Rendering'); - internalRenderTask.initalizeGraphics(transparency); - internalRenderTask.operatorListChanged(); - }, - function pageDisplayReadPromiseError(reason) { - complete(reason); - } - ); + _scheduleNext: function InternalRenderTask__scheduleNext() { + window.requestAnimationFrame(this._nextBound); + }, - function complete(error) { - var i = intentState.renderTasks.indexOf(internalRenderTask); - if (i >= 0) { - intentState.renderTasks.splice(i, 1); + _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(); } + } + } - if (self.cleanupAfterRender) { - self.pendingDestroy = true; - } - self._tryDestroy(); + }; - if (error) { - internalRenderTask.capability.reject(error); - } else { - internalRenderTask.capability.resolve(); - } - stats.timeEnd('Rendering'); - stats.timeEnd('Overall'); + return InternalRenderTask; +})(); + + +var Metadata = PDFJS.Metadata = (function MetadataClosure() { + function fixMetadata(meta) { + return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) { + var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g, + function(code, d1, d2, d3) { + return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1); + }); + var chars = ''; + for (var i = 0; i < bytes.length; i += 2) { + var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1); + chars += code >= 32 && code < 127 && code != 60 && code != 62 && + code != 38 && false ? String.fromCharCode(code) : + '&#x' + (0x10000 + code).toString(16).substring(1) + ';'; } + return '>' + chars; + }); + } - return renderTask; - }, + function Metadata(meta) { + if (typeof meta === 'string') { + // Ghostscript produces invalid metadata + meta = fixMetadata(meta); - /** - * @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 parser = new DOMParser(); + meta = parser.parseFromString(meta, 'application/xml'); + } else if (!(meta instanceof Document)) { + error('Metadata: Invalid metadata object'); + } + + this.metaDocument = meta; + this.metadata = {}; + this.parse(); + } + + Metadata.prototype = { + parse: function Metadata_parse() { + var doc = this.metaDocument; + var rdf = doc.documentElement; + + if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in + rdf = rdf.firstChild; + while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') { + rdf = rdf.nextSibling; } } - var renderingIntent = 'oplist'; - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; + var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null; + if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) { + return; } - 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 - }; + var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength; + for (i = 0, length = children.length; i < length; i++) { + desc = children[i]; + if (desc.nodeName.toLowerCase() !== 'rdf:description') { + continue; + } - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageIndex, - intent: renderingIntent - }); + for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) { + if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') { + entry = desc.childNodes[ii]; + name = entry.nodeName.toLowerCase(); + this.metadata[name] = entry.textContent.trim(); + } + } } - return intentState.opListReadCapability.promise; }, - /** - * @return {Promise} That is resolved a {@link TextContent} - * object that represent the page text content. - */ - getTextContent: function PDFPageProxy_getTextContent() { - return this.transport.messageHandler.sendWithPromise('GetTextContent', { - pageIndex: this.pageNumber - 1 - }); - }, - /** - * Destroys resources allocated by the page. - */ - destroy: function PDFPageProxy_destroy() { - this.pendingDestroy = true; - this._tryDestroy(); + get: function Metadata_get(name) { + return this.metadata[name] || null; }, - /** - * For internal use only. Attempts to clean up if rendering is in a state - * where that's possible. - * @ignore - */ - _tryDestroy: function PDFPageProxy__destroy() { - if (!this.pendingDestroy || - 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.pendingDestroy = 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._tryDestroy(); - } + has: function Metadata_has(name) { + return typeof this.metadata[name] !== 'undefined'; } }; - return PDFPageProxy; + + return Metadata; })(); -/** - * For internal use only. - * @ignore - */ -var WorkerTransport = (function WorkerTransportClosure() { - function WorkerTransport(workerInitializedCapability, workerReadyCapability, - pdfDataRangeTransport, progressCallback) { - this.pdfDataRangeTransport = pdfDataRangeTransport; - this.workerInitializedCapability = workerInitializedCapability; - this.workerReadyCapability = workerReadyCapability; - this.progressCallback = progressCallback; - this.commonObjs = new PDFObjects(); +// contexts store most of the state we need natively. +// However, PDF needs a bit more state, which we store here. - this.pageCache = []; - this.pagePromises = []; - this.downloadInfoCapability = createPromiseCapability(); - this.passwordCallback = null; +// Minimal font size that would be used during canvas fillText operations. +var MIN_FONT_SIZE = 16; +var MAX_GROUP_SIZE = 4096; - // 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. - // Either workers are disabled, not supported or have thrown an exception. - // Thus, we fallback to a faked worker. - this.setupFakeWorker(); - } - WorkerTransport.prototype = { - destroy: function WorkerTransport_destroy() { - this.pageCache = []; - this.pagePromises = []; - var self = this; - this.messageHandler.sendWithPromise('Terminate', null).then(function () { - FontLoader.clear(); - if (self.worker) { - self.worker.terminate(); - } - }); - }, +var COMPILE_TYPE3_GLYPHS = true; - setupFakeWorker: function WorkerTransport_setupFakeWorker() { - globalScope.PDFJS.disableWorker = true; +function createScratchCanvas(width, height) { + var canvas = document.createElement('canvas'); + canvas.width = width; + canvas.height = height; + return canvas; +} - 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. - PDFJS.fakeWorkerFilesLoadedCapability.resolve(); - } - PDFJS.fakeWorkerFilesLoadedCapability.promise.then(function () { - 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() {} - }; +function addContextCurrentTransform(ctx) { + // If the context doesn't expose a `mozCurrentTransform`, add a JS based on. + if (!ctx.mozCurrentTransform) { + // Store the original context + ctx._scaleX = ctx._scaleX || 1.0; + ctx._scaleY = ctx._scaleY || 1.0; + ctx._originalSave = ctx.save; + ctx._originalRestore = ctx.restore; + ctx._originalRotate = ctx.rotate; + ctx._originalScale = ctx.scale; + ctx._originalTranslate = ctx.translate; + ctx._originalTransform = ctx.transform; + ctx._originalSetTransform = ctx.setTransform; - var messageHandler = new MessageHandler('main', fakeWorker); - this.setupMessageHandler(messageHandler); + ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0]; + ctx._transformStack = []; - // If the main thread is our worker, setup the handling for the messages - // the main thread sends to it self. - PDFJS.WorkerMessageHandler.setup(messageHandler); + Object.defineProperty(ctx, 'mozCurrentTransform', { + get: function getCurrentTransform() { + return this._transformMatrix; + } + }); - this.workerInitializedCapability.resolve(); - }.bind(this)); - }, + Object.defineProperty(ctx, 'mozCurrentTransformInverse', { + get: function getCurrentTransformInverse() { + // Calculation done using WolframAlpha: + // http://www.wolframalpha.com/input/? + // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - setupMessageHandler: - function WorkerTransport_setupMessageHandler(messageHandler) { - this.messageHandler = messageHandler; + var m = this._transformMatrix; + var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; - function updatePassword(password) { - messageHandler.send('UpdatePassword', password); + var ad_bc = a * d - b * c; + var bc_ad = b * c - a * d; + + return [ + d / ad_bc, + b / bc_ad, + c / bc_ad, + a / ad_bc, + (d * e - c * f) / bc_ad, + (b * e - a * f) / ad_bc + ]; } + }); - var pdfDataRangeTransport = this.pdfDataRangeTransport; - if (pdfDataRangeTransport) { - pdfDataRangeTransport.addRangeListener(function(begin, chunk) { - messageHandler.send('OnDataRange', { - begin: begin, - chunk: chunk - }); - }); + ctx.save = function ctxSave() { + var old = this._transformMatrix; + this._transformStack.push(old); + this._transformMatrix = old.slice(0, 6); - pdfDataRangeTransport.addProgressListener(function(loaded) { - messageHandler.send('OnDataProgress', { - loaded: loaded - }); - }); + this._originalSave(); + }; - messageHandler.on('RequestDataRange', - function transportDataRange(data) { - pdfDataRangeTransport.requestDataRange(data.begin, data.end); - }, this); + ctx.restore = function ctxRestore() { + var prev = this._transformStack.pop(); + if (prev) { + this._transformMatrix = prev; + this._originalRestore(); } + }; - messageHandler.on('GetDoc', function transportDoc(data) { - var pdfInfo = data.pdfInfo; - this.numPages = data.pdfInfo.numPages; - var pdfDocument = new PDFDocumentProxy(pdfInfo, this); - this.pdfDocument = pdfDocument; - this.workerReadyCapability.resolve(pdfDocument); - }, this); + ctx.translate = function ctxTranslate(x, y) { + var m = this._transformMatrix; + m[4] = m[0] * x + m[2] * y + m[4]; + m[5] = m[1] * x + m[3] * y + m[5]; - messageHandler.on('NeedPassword', function transportPassword(data) { - if (this.passwordCallback) { - return this.passwordCallback(updatePassword, - PasswordResponses.NEED_PASSWORD); - } - this.workerReadyCapability.reject(data.exception.message, - data.exception); - }, this); + this._originalTranslate(x, y); + }; - messageHandler.on('IncorrectPassword', function transportBadPass(data) { - if (this.passwordCallback) { - return this.passwordCallback(updatePassword, - PasswordResponses.INCORRECT_PASSWORD); - } - this.workerReadyCapability.reject(data.exception.message, - data.exception); - }, this); + ctx.scale = function ctxScale(x, y) { + var m = this._transformMatrix; + m[0] = m[0] * x; + m[1] = m[1] * x; + m[2] = m[2] * y; + m[3] = m[3] * y; - messageHandler.on('InvalidPDF', function transportInvalidPDF(data) { - this.workerReadyCapability.reject(data.exception.name, data.exception); - }, this); + this._originalScale(x, y); + }; - messageHandler.on('MissingPDF', function transportMissingPDF(data) { - this.workerReadyCapability.reject(data.exception.message, - data.exception); - }, this); + ctx.transform = function ctxTransform(a, b, c, d, e, f) { + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * a + m[2] * b, + m[1] * a + m[3] * b, + m[0] * c + m[2] * d, + m[1] * c + m[3] * d, + m[0] * e + m[2] * f + m[4], + m[1] * e + m[3] * f + m[5] + ]; - messageHandler.on('UnknownError', function transportUnknownError(data) { - this.workerReadyCapability.reject(data.exception.message, - data.exception); - }, this); + ctx._originalTransform(a, b, c, d, e, f); + }; - messageHandler.on('DataLoaded', function transportPage(data) { - this.downloadInfoCapability.resolve(data); - }, this); + ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { + this._transformMatrix = [a, b, c, d, e, f]; - messageHandler.on('StartRenderPage', function transportRender(data) { - var page = this.pageCache[data.pageIndex]; + ctx._originalSetTransform(a, b, c, d, e, f); + }; - page.stats.timeEnd('Page Request'); - page._startRenderPage(data.transparency, data.intent); - }, this); + ctx.rotate = function ctxRotate(angle) { + var cosValue = Math.cos(angle); + var sinValue = Math.sin(angle); - messageHandler.on('RenderPageChunk', function transportRender(data) { - var page = this.pageCache[data.pageIndex]; + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * cosValue + m[2] * sinValue, + m[1] * cosValue + m[3] * sinValue, + m[0] * (-sinValue) + m[2] * cosValue, + m[1] * (-sinValue) + m[3] * cosValue, + m[4], + m[5] + ]; - page._renderPageChunk(data.operatorList, data.intent); - }, this); + this._originalRotate(angle); + }; + } +} - messageHandler.on('commonobj', function transportObj(data) { - var id = data[0]; - var type = data[1]; - if (this.commonObjs.hasData(id)) { - return; +var CachedCanvases = (function CachedCanvasesClosure() { + var cache = {}; + return { + getCanvas: function CachedCanvases_getCanvas(id, width, height, + trackTransform) { + var canvasEntry; + if (id in cache) { + canvasEntry = cache[id]; + canvasEntry.canvas.width = width; + canvasEntry.canvas.height = height; + // reset canvas transform for emulated mozCurrentTransform, if needed + canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); + } else { + var canvas = createScratchCanvas(width, height); + var ctx = canvas.getContext('2d'); + if (trackTransform) { + addContextCurrentTransform(ctx); } + cache[id] = canvasEntry = {canvas: canvas, context: ctx}; + } + return canvasEntry; + }, + clear: function () { + for (var id in cache) { + var canvasEntry = cache[id]; + // Zeroing the width and height causes Firefox to release graphics + // resources immediately, which can greatly reduce memory consumption. + canvasEntry.canvas.width = 0; + canvasEntry.canvas.height = 0; + delete cache[id]; + } + } + }; +})(); - switch (type) { - case 'Font': - var exportedData = data[2]; +function compileType3Glyph(imgData) { + var POINT_TO_PROCESS_LIMIT = 1000; - 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 FontFace(exportedData); - } + var width = imgData.width, height = imgData.height; + var i, j, j0, width1 = width + 1; + var points = new Uint8Array(width1 * (height + 1)); + var POINT_TYPES = + new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); - 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); + // decodes bit-packed mask data + var lineSize = (width + 7) & ~7, data0 = imgData.data; + var data = new Uint8Array(lineSize * height), pos = 0, ii; + for (i = 0, ii = data0.length; i < ii; i++) { + var mask = 128, elem = data0[i]; + while (mask > 0) { + data[pos++] = (elem & mask) ? 0 : 255; + mask >>= 1; + } + } - messageHandler.on('obj', function transportObj(data) { - 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; - } + // finding iteresting points: every point is located between mask pixels, + // so there will be points of the (width + 1)x(height + 1) grid. Every point + // will have flags assigned based on neighboring mask pixels: + // 4 | 8 + // --P-- + // 2 | 1 + // We are interested only in points with the flags: + // - outside corners: 1, 2, 4, 8; + // - inside corners: 7, 11, 13, 14; + // - and, intersections: 5, 10. + var count = 0; + pos = 0; + if (data[pos] !== 0) { + points[0] = 1; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j] = data[pos] ? 2 : 1; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j] = 2; + ++count; + } + for (i = 1; i < height; i++) { + pos = i * lineSize; + j0 = i * width1; + if (data[pos - lineSize] !== data[pos]) { + points[j0] = data[pos] ? 1 : 8; + ++count; + } + // 'sum' is the position of the current pixel configuration in the 'TYPES' + // array (in order 8-1-2-4, so we can use '>>2' to shift the column). + var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); + for (j = 1; j < width; j++) { + sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + + (data[pos - lineSize + 1] ? 8 : 0); + if (POINT_TYPES[sum]) { + points[j0 + j] = POINT_TYPES[sum]; + ++count; + } + pos++; + } + if (data[pos - lineSize] !== data[pos]) { + points[j0 + j] = data[pos] ? 2 : 4; + ++count; + } - switch (type) { - case 'JpegStream': - imageData = data[3]; - loadJpegStream(id, imageData, pageProxy.objs); - break; - case 'Image': - imageData = data[3]; - pageProxy.objs.resolve(id, imageData); + if (count > POINT_TO_PROCESS_LIMIT) { + return null; + } + } - // 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); + pos = lineSize * (height - 1); + j0 = i * width1; + if (data[pos] !== 0) { + points[j0] = 8; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j0 + j] = data[pos] ? 4 : 8; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j0 + j] = 4; + ++count; + } + if (count > POINT_TO_PROCESS_LIMIT) { + return null; + } - messageHandler.on('DocProgress', function transportDocProgress(data) { - if (this.progressCallback) { - this.progressCallback({ - loaded: data.loaded, - total: data.total - }); - } - }, this); + // building outlines + var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); + var outlines = []; + for (i = 0; count && i <= height; i++) { + var p = i * width1; + var end = p + width; + while (p < end && !points[p]) { + p++; + } + if (p === end) { + continue; + } + var coords = [p % width1, i]; - messageHandler.on('DocError', function transportDocError(data) { - this.workerReadyCapability.reject(data); - }, this); + var type = points[p], p0 = p, pp; + do { + var step = steps[type]; + do { + p += step; + } while (!points[p]); - messageHandler.on('PageError', function transportError(data) { - var page = this.pageCache[data.pageNum - 1]; - var intentState = page.intentStates[data.intent]; - if (intentState.displayReadyCapability.promise) { - intentState.displayReadyCapability.reject(data.error); - } else { - error(data.error); - } - }, this); + pp = points[p]; + if (pp !== 5 && pp !== 10) { + // set new direction + type = pp; + // delete mark + points[p] = 0; + } else { // type is 5 or 10, ie, a crossing + // set new direction + type = pp & ((0x33 * type) >> 4); + // set new type for "future hit" + points[p] &= (type >> 2 | type << 2); + } - messageHandler.on('JpegDecode', function(data) { - 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; - }); - }); - }, - - fetchDocument: function WorkerTransport_fetchDocument(source) { - source.disableAutoFetch = PDFJS.disableAutoFetch; - source.chunkedViewerLoading = !!this.pdfDataRangeTransport; - this.messageHandler.send('GetDocRequest', { - source: source, - disableRange: PDFJS.disableRange, - maxImageSize: PDFJS.maxImageSize, - cMapUrl: PDFJS.cMapUrl, - cMapPacked: PDFJS.cMapPacked, - disableFontFace: PDFJS.disableFontFace, - disableCreateObjectURL: PDFJS.disableCreateObjectURL, - verbosity: PDFJS.verbosity - }); - }, - - 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')); - } + coords.push(p % width1); + coords.push((p / width1) | 0); + --count; + } while (p0 !== p); + outlines.push(coords); + --i; + } - var pageIndex = pageNumber - 1; - if (pageIndex in this.pagePromises) { - return this.pagePromises[pageIndex]; + var drawOutline = function(c) { + c.save(); + // the path shall be painted in [0..1]x[0..1] space + c.scale(1 / width, -1 / height); + c.translate(0, -height); + c.beginPath(); + for (var i = 0, ii = outlines.length; i < ii; i++) { + var o = outlines[i]; + c.moveTo(o[0], o[1]); + for (var j = 2, jj = o.length; j < jj; j += 2) { + c.lineTo(o[j], o[j+1]); } - var promise = this.messageHandler.sendWithPromise('GetPage', { - pageIndex: pageIndex - }).then(function (pageInfo) { - 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) { - return this.messageHandler.sendWithPromise('GetAnnotations', - { pageIndex: pageIndex }); - }, - - getDestinations: function WorkerTransport_getDestinations() { - return this.messageHandler.sendWithPromise('GetDestinations', null); - }, - - getAttachments: function WorkerTransport_getAttachments() { - return this.messageHandler.sendWithPromise('GetAttachments', null); - }, + } + c.fill(); + c.beginPath(); + c.restore(); + }; - getJavaScript: function WorkerTransport_getJavaScript() { - return this.messageHandler.sendWithPromise('GetJavaScript', null); - }, + return drawOutline; +} - getOutline: function WorkerTransport_getOutline() { - return this.messageHandler.sendWithPromise('GetOutline', null); - }, +var CanvasExtraState = (function CanvasExtraStateClosure() { + function CanvasExtraState(old) { + // Are soft masks and alpha values shapes or opacities? + this.alphaIsShape = false; + this.fontSize = 0; + this.fontSizeScale = 1; + this.textMatrix = IDENTITY_MATRIX; + this.textMatrixScale = 1; + this.fontMatrix = FONT_IDENTITY_MATRIX; + this.leading = 0; + // Current point (in user coordinates) + this.x = 0; + this.y = 0; + // Start of text line (in text coordinates) + this.lineX = 0; + this.lineY = 0; + // Character and word spacing + this.charSpacing = 0; + this.wordSpacing = 0; + this.textHScale = 1; + this.textRenderingMode = TextRenderingMode.FILL; + this.textRise = 0; + // Default fore and background colors + this.fillColor = '#000000'; + this.strokeColor = '#000000'; + // Note: fill alpha applies to all non-stroking operations + this.fillAlpha = 1; + this.strokeAlpha = 1; + this.lineWidth = 1; + this.activeSMask = null; // nonclonable field (see the save method below) - getMetadata: function WorkerTransport_getMetadata() { - return this.messageHandler.sendWithPromise('GetMetadata', null). - then(function transportMetadata(results) { - return { - info: results[0], - metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) - }; - }); - }, + this.old = old; + } - getStats: function WorkerTransport_getStats() { - return this.messageHandler.sendWithPromise('GetStats', null); + CanvasExtraState.prototype = { + clone: function CanvasExtraState_clone() { + return Object.create(this); }, - - 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.destroy(); - } - } - this.commonObjs.clear(); - FontLoader.clear(); - }.bind(this)); + setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { + this.x = x; + this.y = y; } }; - return WorkerTransport; - + return CanvasExtraState; })(); -/** - * 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 CanvasGraphics = (function CanvasGraphicsClosure() { + // Defines the time the executeOperatorList is going to be executing + // before it stops and shedules a continue of execution. + var EXECUTION_TIME = 15; + // Defines the number of steps before checking the execution time + var EXECUTION_STEPS = 10; - var obj = { - capability: createPromiseCapability(), - data: null, - resolved: false - }; - this.objs[objId] = obj; + function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { + this.ctx = canvasCtx; + this.current = new CanvasExtraState(); + this.stateStack = []; + this.pendingClip = null; + this.pendingEOFill = false; + this.res = null; + this.xobjs = null; + this.commonObjs = commonObjs; + this.objs = objs; + this.imageLayer = imageLayer; + this.groupStack = []; + this.processingType3 = null; + // Patterns are painted relative to the initial page/form transform, see pdf + // spec 8.7.2 NOTE 1. + this.baseTransform = null; + this.baseTransformStack = []; + this.groupLevel = 0; + this.smaskStack = []; + this.smaskCounter = 0; + this.tempSMask = null; + if (canvasCtx) { + addContextCurrentTransform(canvasCtx); + } + } - return obj; - }, + function putBinaryImageData(ctx, imgData) { + if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { + ctx.putImageData(imgData, 0, 0); + return; + } - /** - * 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; - } + // Put the image data to the canvas in chunks, rather than putting the + // whole image at once. This saves JS memory, because the ImageData object + // is smaller. It also possibly saves C++ memory within the implementation + // of putImageData(). (E.g. in Firefox we make two short-lived copies of + // the data passed to putImageData()). |n| shouldn't be too small, however, + // because too many putImageData() calls will slow things down. + // + // Note: as written, if the last chunk is partial, the putImageData() call + // will (conceptually) put pixels past the bounds of the canvas. But + // that's ok; any such pixels are ignored. - // If there isn't a callback, the user expects to get the resolved data - // directly. - var obj = this.objs[objId]; + var height = imgData.height, width = imgData.width; + var fullChunkHeight = 16; + var fracChunks = height / fullChunkHeight; + var fullChunks = Math.floor(fracChunks); + var totalChunks = Math.ceil(fracChunks); + var partialChunkHeight = height - fullChunks * fullChunkHeight; - // 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); - } + var chunkImgData = ctx.createImageData(width, fullChunkHeight); + var srcPos = 0, destPos; + var src = imgData.data; + var dest = chunkImgData.data; + var i, j, thisChunkHeight, elemsInThisChunk; - return obj.data; - }, + // There are multiple forms in which the pixel data can be passed, and + // imgData.kind tells us which one this is. + if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { + // Grayscale, 1 bit per pixel (i.e. black-and-white). + var srcLength = src.byteLength; + var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : + new Uint32ArrayView(dest); + var dest32DataLength = dest32.length; + var fullSrcDiff = (width + 7) >> 3; + var white = 0xFFFFFFFF; + var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? + 0xFF000000 : 0x000000FF; + for (i = 0; i < totalChunks; i++) { + thisChunkHeight = + (i < fullChunks) ? fullChunkHeight : partialChunkHeight; + destPos = 0; + for (j = 0; j < thisChunkHeight; j++) { + var srcDiff = srcLength - srcPos; + var k = 0; + var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; + var kEndUnrolled = kEnd & ~7; + var mask = 0; + var srcByte = 0; + for (; k < kEndUnrolled; k += 8) { + srcByte = src[srcPos++]; + dest32[destPos++] = (srcByte & 128) ? white : black; + dest32[destPos++] = (srcByte & 64) ? white : black; + dest32[destPos++] = (srcByte & 32) ? white : black; + dest32[destPos++] = (srcByte & 16) ? white : black; + dest32[destPos++] = (srcByte & 8) ? white : black; + dest32[destPos++] = (srcByte & 4) ? white : black; + dest32[destPos++] = (srcByte & 2) ? white : black; + dest32[destPos++] = (srcByte & 1) ? white : black; + } + for (; k < kEnd; k++) { + if (mask === 0) { + srcByte = src[srcPos++]; + mask = 128; + } - /** - * Resolves the object `objId` with optional `data`. - */ - resolve: function PDFObjects_resolve(objId, data) { - var obj = this.ensureObj(objId); + dest32[destPos++] = (srcByte & mask) ? white : black; + mask >>= 1; + } + } + // We ran out of input. Make all remaining pixels transparent. + while (destPos < dest32DataLength) { + dest32[destPos++] = 0; + } - obj.resolved = true; - obj.data = data; - obj.capability.resolve(data); - }, + ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); + } + } else if (imgData.kind === ImageKind.RGBA_32BPP) { + // RGBA, 32-bits per pixel. - isResolved: function PDFObjects_isResolved(objId) { - var objs = this.objs; + j = 0; + elemsInThisChunk = width * fullChunkHeight * 4; + for (i = 0; i < fullChunks; i++) { + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + srcPos += elemsInThisChunk; - if (!objs[objId]) { - return false; - } else { - return objs[objId].resolved; + ctx.putImageData(chunkImgData, 0, j); + j += fullChunkHeight; + } + if (i < totalChunks) { + elemsInThisChunk = width * partialChunkHeight * 4; + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + ctx.putImageData(chunkImgData, 0, j); } - }, - hasData: function PDFObjects_hasData(objId) { - return this.isResolved(objId); - }, + } else if (imgData.kind === ImageKind.RGB_24BPP) { + // RGB, 24-bits per pixel. + thisChunkHeight = fullChunkHeight; + elemsInThisChunk = width * thisChunkHeight; + for (i = 0; i < totalChunks; i++) { + if (i >= fullChunks) { + thisChunkHeight =partialChunkHeight; + elemsInThisChunk = width * thisChunkHeight; + } - /** - * 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; + destPos = 0; + for (j = elemsInThisChunk; j--;) { + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = 255; + } + ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); } - }, - - clear: function PDFObjects_clear() { - this.objs = {}; + } else { + error('bad image kind: ' + imgData.kind); } - }; - return PDFObjects; -})(); - -/** - * Allows controlling of the rendering tasks. - * @class - */ -var RenderTask = (function RenderTaskClosure() { - function RenderTask(internalRenderTask) { - this.internalRenderTask = internalRenderTask; - /** - * Promise for rendering task completion. - * @type {Promise} - */ - this.promise = this.internalRenderTask.capability.promise; } - RenderTask.prototype = /** @lends RenderTask.prototype */ { - /** - * 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 callback 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(onFulfilled, onRejected); - } - }; + function putBinaryImageMask(ctx, imgData) { + var height = imgData.height, width = imgData.width; + var fullChunkHeight = 16; + var fracChunks = height / fullChunkHeight; + var fullChunks = Math.floor(fracChunks); + var totalChunks = Math.ceil(fracChunks); + var partialChunkHeight = height - fullChunks * fullChunkHeight; - return RenderTask; -})(); + var chunkImgData = ctx.createImageData(width, fullChunkHeight); + var srcPos = 0; + var src = imgData.data; + var dest = chunkImgData.data; -/** - * For internal use only. - * @ignore - */ -var InternalRenderTask = (function InternalRenderTaskClosure() { + for (var i = 0; i < totalChunks; i++) { + var thisChunkHeight = + (i < fullChunks) ? fullChunkHeight : partialChunkHeight; - 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.cancelled = false; - this.capability = createPromiseCapability(); - // caching this-bound methods - this._continueBound = this._continue.bind(this); - this._scheduleNextBound = this._scheduleNext.bind(this); - this._nextBound = this._next.bind(this); + // Expand the mask so it can be used by the canvas. Any required + // inversion has already been handled. + var destPos = 3; // alpha component offset + for (var j = 0; j < thisChunkHeight; j++) { + var mask = 0; + for (var k = 0; k < width; k++) { + if (!mask) { + var elem = src[srcPos++]; + mask = 128; + } + dest[destPos] = (elem & mask) ? 0 : 255; + destPos += 4; + mask >>= 1; + } + } + ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); + } } - InternalRenderTask.prototype = { - - initalizeGraphics: - function InternalRenderTask_initalizeGraphics(transparency) { - - if (this.cancelled) { - return; + function copyCtxState(sourceCtx, destCtx) { + var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', + 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', + 'globalCompositeOperation', 'font']; + for (var i = 0, ii = properties.length; i < ii; i++) { + var property = properties[i]; + if (property in sourceCtx) { + destCtx[property] = sourceCtx[property]; } - 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(); + } + if ('setLineDash' in sourceCtx) { + destCtx.setLineDash(sourceCtx.getLineDash()); + destCtx.lineDashOffset = sourceCtx.lineDashOffset; + } else if ('mozDash' in sourceCtx) { + destCtx.mozDash = sourceCtx.mozDash; + destCtx.mozDashOffset = sourceCtx.mozDashOffset; + } + } + + function composeSMaskBackdrop(bytes, r0, g0, b0) { + var length = bytes.length; + for (var i = 3; i < length; i += 4) { + var alpha = bytes[i]; + if (alpha === 0) { + bytes[i - 3] = r0; + bytes[i - 2] = g0; + bytes[i - 1] = b0; + } else if (alpha < 255) { + var alpha_ = 255 - alpha; + bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; + bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; + bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; } + } + } - var params = this.params; - this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, - this.objs, params.imageLayer); + function composeSMaskAlpha(maskData, layerData) { + var length = maskData.length; + var scale = 1 / 255; + for (var i = 3; i < length; i += 4) { + var alpha = maskData[i]; + layerData[i] = (layerData[i] * alpha * scale) | 0; + } + } - this.gfx.beginDrawing(params.viewport, transparency); - this.operatorListIdx = 0; - this.graphicsReady = true; - if (this.graphicsReadyCallback) { - this.graphicsReadyCallback(); - } - }, + function composeSMaskLuminosity(maskData, layerData) { + var length = maskData.length; + for (var i = 3; i < length; i += 4) { + var y = ((maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 + (maskData[i - 2] * 152) + // * 0.59 .... + (maskData[i - 1] * 28)) | 0; // * 0.11 .... + layerData[i] = (layerData[i] * y) >> 16; + } + } - cancel: function InternalRenderTask_cancel() { - this.running = false; - this.cancelled = true; - this.callback('cancelled'); - }, + function genericComposeSMask(maskCtx, layerCtx, width, height, + subtype, backdrop) { + var hasBackdrop = !!backdrop; + var r0 = hasBackdrop ? backdrop[0] : 0; + var g0 = hasBackdrop ? backdrop[1] : 0; + var b0 = hasBackdrop ? backdrop[2] : 0; - operatorListChanged: function InternalRenderTask_operatorListChanged() { - if (!this.graphicsReady) { - if (!this.graphicsReadyCallback) { - this.graphicsReadyCallback = this._continueBound; - } - return; - } + var composeFn; + if (subtype === 'Luminosity') { + composeFn = composeSMaskLuminosity; + } else { + composeFn = composeSMaskAlpha; + } - if (this.stepper) { - this.stepper.updateOperatorList(this.operatorList); - } + // processing image in chunks to save memory + var PIXELS_TO_PROCESS = 65536; + var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); + for (var row = 0; row < height; row += chunkSize) { + var chunkHeight = Math.min(chunkSize, height - row); + var maskData = maskCtx.getImageData(0, row, width, chunkHeight); + var layerData = layerCtx.getImageData(0, row, width, chunkHeight); - if (this.running) { - return; + if (hasBackdrop) { + composeSMaskBackdrop(maskData.data, r0, g0, b0); } - this._continue(); - }, + composeFn(maskData.data, layerData.data); - _continue: function InternalRenderTask__continue() { - this.running = true; - if (this.cancelled) { - return; - } - if (this.params.continueCallback) { - this.params.continueCallback(this._scheduleNextBound); - } else { - this._scheduleNext(); - } - }, + maskCtx.putImageData(layerData, 0, row); + } + } - _scheduleNext: function InternalRenderTask__scheduleNext() { - window.requestAnimationFrame(this._nextBound); - }, + function composeSMask(ctx, smask, layerCtx) { + var mask = smask.canvas; + var maskCtx = smask.context; - _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(); - } - } - } + ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, + smask.offsetX, smask.offsetY); - }; + var backdrop = smask.backdrop || null; + if (WebGLUtils.isEnabled) { + var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, + {subtype: smask.subtype, backdrop: backdrop}); + ctx.setTransform(1, 0, 0, 1, 0, 0); + ctx.drawImage(composed, smask.offsetX, smask.offsetY); + return; + } + genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, + smask.subtype, backdrop); + ctx.drawImage(mask, 0, 0); + } - return InternalRenderTask; -})(); + var LINE_CAP_STYLES = ['butt', 'round', 'square']; + var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; + var NORMAL_CLIP = {}; + var EO_CLIP = {}; + CanvasGraphics.prototype = { -var Metadata = PDFJS.Metadata = (function MetadataClosure() { - function fixMetadata(meta) { - return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) { - var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g, - function(code, d1, d2, d3) { - return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1); - }); - var chars = ''; - for (var i = 0; i < bytes.length; i += 2) { - var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1); - chars += code >= 32 && code < 127 && code != 60 && code != 62 && - code != 38 && false ? String.fromCharCode(code) : - '&#x' + (0x10000 + code).toString(16).substring(1) + ';'; + beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) { + // For pdfs that use blend modes we have to clear the canvas else certain + // blend modes can look wrong since we'd be blending with a white + // backdrop. The problem with a transparent backdrop though is we then + // don't get sub pixel anti aliasing on text, so we fill with white if + // we can. + var width = this.ctx.canvas.width; + var height = this.ctx.canvas.height; + if (transparency) { + this.ctx.clearRect(0, 0, width, height); + } else { + this.ctx.mozOpaque = true; + this.ctx.save(); + this.ctx.fillStyle = 'rgb(255, 255, 255)'; + this.ctx.fillRect(0, 0, width, height); + this.ctx.restore(); } - return '>' + chars; - }); - } - - function Metadata(meta) { - if (typeof meta === 'string') { - // Ghostscript produces invalid metadata - meta = fixMetadata(meta); - var parser = new DOMParser(); - meta = parser.parseFromString(meta, 'application/xml'); - } else if (!(meta instanceof Document)) { - error('Metadata: Invalid metadata object'); - } + var transform = viewport.transform; - this.metaDocument = meta; - this.metadata = {}; - this.parse(); - } + this.ctx.save(); + this.ctx.transform.apply(this.ctx, transform); - Metadata.prototype = { - parse: function Metadata_parse() { - var doc = this.metaDocument; - var rdf = doc.documentElement; + this.baseTransform = this.ctx.mozCurrentTransform.slice(); - if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in - rdf = rdf.firstChild; - while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') { - rdf = rdf.nextSibling; - } + if (this.imageLayer) { + this.imageLayer.beginLayout(); } + }, - var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null; - if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) { - return; + executeOperatorList: function CanvasGraphics_executeOperatorList( + operatorList, + executionStartIdx, continueCallback, + stepper) { + var argsArray = operatorList.argsArray; + var fnArray = operatorList.fnArray; + var i = executionStartIdx || 0; + var argsArrayLen = argsArray.length; + + // Sometimes the OperatorList to execute is empty. + if (argsArrayLen === i) { + return i; } - var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength; - for (i = 0, length = children.length; i < length; i++) { - desc = children[i]; - if (desc.nodeName.toLowerCase() !== 'rdf:description') { - continue; - } + var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && + typeof continueCallback === 'function'); + var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; + var steps = 0; - for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) { - if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') { - entry = desc.childNodes[ii]; - name = entry.nodeName.toLowerCase(); - this.metadata[name] = entry.textContent.trim(); - } - } - } - }, - - get: function Metadata_get(name) { - return this.metadata[name] || null; - }, - - has: function Metadata_has(name) { - return typeof this.metadata[name] !== 'undefined'; - } - }; - - return Metadata; -})(); + var commonObjs = this.commonObjs; + var objs = this.objs; + var fnId; + while (true) { + if (stepper !== undefined && i === stepper.nextBreakPoint) { + stepper.breakIt(i, continueCallback); + return i; + } -// contexts store most of the state we need natively. -// However, PDF needs a bit more state, which we store here. + fnId = fnArray[i]; -// Minimal font size that would be used during canvas fillText operations. -var MIN_FONT_SIZE = 16; -var MAX_GROUP_SIZE = 4096; + if (fnId !== OPS.dependency) { + this[fnId].apply(this, argsArray[i]); + } else { + var deps = argsArray[i]; + for (var n = 0, nn = deps.length; n < nn; n++) { + var depObjId = deps[n]; + var common = depObjId[0] === 'g' && depObjId[1] === '_'; + var objsPool = common ? commonObjs : objs; -var COMPILE_TYPE3_GLYPHS = true; + // If the promise isn't resolved yet, add the continueCallback + // to the promise and bail out. + if (!objsPool.isResolved(depObjId)) { + objsPool.get(depObjId, continueCallback); + return i; + } + } + } -function createScratchCanvas(width, height) { - var canvas = document.createElement('canvas'); - canvas.width = width; - canvas.height = height; - return canvas; -} + i++; -function addContextCurrentTransform(ctx) { - // If the context doesn't expose a `mozCurrentTransform`, add a JS based on. - if (!ctx.mozCurrentTransform) { - // Store the original context - ctx._scaleX = ctx._scaleX || 1.0; - ctx._scaleY = ctx._scaleY || 1.0; - ctx._originalSave = ctx.save; - ctx._originalRestore = ctx.restore; - ctx._originalRotate = ctx.rotate; - ctx._originalScale = ctx.scale; - ctx._originalTranslate = ctx.translate; - ctx._originalTransform = ctx.transform; - ctx._originalSetTransform = ctx.setTransform; + // If the entire operatorList was executed, stop as were done. + if (i === argsArrayLen) { + return i; + } - ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0]; - ctx._transformStack = []; + // If the execution took longer then a certain amount of time and + // `continueCallback` is specified, interrupt the execution. + if (chunkOperations && ++steps > EXECUTION_STEPS) { + if (Date.now() > endTime) { + continueCallback(); + return i; + } + steps = 0; + } - Object.defineProperty(ctx, 'mozCurrentTransform', { - get: function getCurrentTransform() { - return this._transformMatrix; + // If the operatorList isn't executed completely yet OR the execution + // time was short enough, do another execution round. } - }); - - Object.defineProperty(ctx, 'mozCurrentTransformInverse', { - get: function getCurrentTransformInverse() { - // Calculation done using WolframAlpha: - // http://www.wolframalpha.com/input/? - // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - - var m = this._transformMatrix; - var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; + }, - var ad_bc = a * d - b * c; - var bc_ad = b * c - a * d; + endDrawing: function CanvasGraphics_endDrawing() { + this.ctx.restore(); + CachedCanvases.clear(); + WebGLUtils.clear(); - return [ - d / ad_bc, - b / bc_ad, - c / bc_ad, - a / ad_bc, - (d * e - c * f) / bc_ad, - (b * e - a * f) / ad_bc - ]; + if (this.imageLayer) { + this.imageLayer.endLayout(); } - }); - - ctx.save = function ctxSave() { - var old = this._transformMatrix; - this._transformStack.push(old); - this._transformMatrix = old.slice(0, 6); + }, - this._originalSave(); - }; + // Graphics state + setLineWidth: function CanvasGraphics_setLineWidth(width) { + this.current.lineWidth = width; + this.ctx.lineWidth = width; + }, + setLineCap: function CanvasGraphics_setLineCap(style) { + this.ctx.lineCap = LINE_CAP_STYLES[style]; + }, + setLineJoin: function CanvasGraphics_setLineJoin(style) { + this.ctx.lineJoin = LINE_JOIN_STYLES[style]; + }, + setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { + this.ctx.miterLimit = limit; + }, + setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { + var ctx = this.ctx; + if ('setLineDash' in ctx) { + ctx.setLineDash(dashArray); + ctx.lineDashOffset = dashPhase; + } else { + ctx.mozDash = dashArray; + ctx.mozDashOffset = dashPhase; + } + }, + setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { + // Maybe if we one day fully support color spaces this will be important + // for now we can ignore. + // TODO set rendering intent? + }, + setFlatness: function CanvasGraphics_setFlatness(flatness) { + // There's no way to control this with canvas, but we can safely ignore. + // TODO set flatness? + }, + setGState: function CanvasGraphics_setGState(states) { + for (var i = 0, ii = states.length; i < ii; i++) { + var state = states[i]; + var key = state[0]; + var value = state[1]; - ctx.restore = function ctxRestore() { - var prev = this._transformStack.pop(); - if (prev) { - this._transformMatrix = prev; - this._originalRestore(); + switch (key) { + case 'LW': + this.setLineWidth(value); + break; + case 'LC': + this.setLineCap(value); + break; + case 'LJ': + this.setLineJoin(value); + break; + case 'ML': + this.setMiterLimit(value); + break; + case 'D': + this.setDash(value[0], value[1]); + break; + case 'RI': + this.setRenderingIntent(value); + break; + case 'FL': + this.setFlatness(value); + break; + case 'Font': + this.setFont(value[0], value[1]); + break; + case 'CA': + this.current.strokeAlpha = state[1]; + break; + case 'ca': + this.current.fillAlpha = state[1]; + this.ctx.globalAlpha = state[1]; + break; + case 'BM': + if (value && value.name && (value.name !== 'Normal')) { + var mode = value.name.replace(/([A-Z])/g, + function(c) { + return '-' + c.toLowerCase(); + } + ).substring(1); + this.ctx.globalCompositeOperation = mode; + if (this.ctx.globalCompositeOperation !== mode) { + warn('globalCompositeOperation "' + mode + + '" is not supported'); + } + } else { + this.ctx.globalCompositeOperation = 'source-over'; + } + break; + case 'SMask': + if (this.current.activeSMask) { + this.endSMaskGroup(); + } + this.current.activeSMask = value ? this.tempSMask : null; + if (this.current.activeSMask) { + this.beginSMaskGroup(); + } + this.tempSMask = null; + break; + } } - }; + }, + beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { - ctx.translate = function ctxTranslate(x, y) { - var m = this._transformMatrix; - m[4] = m[0] * x + m[2] * y + m[4]; - m[5] = m[1] * x + m[3] * y + m[5]; + var activeSMask = this.current.activeSMask; + var drawnWidth = activeSMask.canvas.width; + var drawnHeight = activeSMask.canvas.height; + var cacheId = 'smaskGroupAt' + this.groupLevel; + var scratchCanvas = CachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); - this._originalTranslate(x, y); - }; + var currentCtx = this.ctx; + var currentTransform = currentCtx.mozCurrentTransform; + this.ctx.save(); - ctx.scale = function ctxScale(x, y) { - var m = this._transformMatrix; - m[0] = m[0] * x; - m[1] = m[1] * x; - m[2] = m[2] * y; - m[3] = m[3] * y; + var groupCtx = scratchCanvas.context; + groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); + groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); + groupCtx.transform.apply(groupCtx, currentTransform); - this._originalScale(x, y); - }; - - ctx.transform = function ctxTransform(a, b, c, d, e, f) { - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * a + m[2] * b, - m[1] * a + m[3] * b, - m[0] * c + m[2] * d, - m[1] * c + m[3] * d, - m[0] * e + m[2] * f + m[4], - m[1] * e + m[3] * f + m[5] - ]; - - ctx._originalTransform(a, b, c, d, e, f); - }; - - ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { - this._transformMatrix = [a, b, c, d, e, f]; - - ctx._originalSetTransform(a, b, c, d, e, f); - }; - - ctx.rotate = function ctxRotate(angle) { - var cosValue = Math.cos(angle); - var sinValue = Math.sin(angle); + copyCtxState(currentCtx, groupCtx); + this.ctx = groupCtx; + this.setGState([ + ['BM', 'Normal'], + ['ca', 1], + ['CA', 1] + ]); + this.groupStack.push(currentCtx); + this.groupLevel++; + }, + endSMaskGroup: function CanvasGraphics_endSMaskGroup() { + var groupCtx = this.ctx; + this.groupLevel--; + this.ctx = this.groupStack.pop(); - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * cosValue + m[2] * sinValue, - m[1] * cosValue + m[3] * sinValue, - m[0] * (-sinValue) + m[2] * cosValue, - m[1] * (-sinValue) + m[3] * cosValue, - m[4], - m[5] - ]; + composeSMask(this.ctx, this.current.activeSMask, groupCtx); + this.ctx.restore(); + }, + save: function CanvasGraphics_save() { + this.ctx.save(); + var old = this.current; + this.stateStack.push(old); + this.current = old.clone(); + this.current.activeSMask = null; + }, + restore: function CanvasGraphics_restore() { + if (this.stateStack.length !== 0) { + if (this.current.activeSMask !== null) { + this.endSMaskGroup(); + } - this._originalRotate(angle); - }; - } -} + this.current = this.stateStack.pop(); + this.ctx.restore(); + } + }, + transform: function CanvasGraphics_transform(a, b, c, d, e, f) { + this.ctx.transform(a, b, c, d, e, f); + }, -var CachedCanvases = (function CachedCanvasesClosure() { - var cache = {}; - return { - getCanvas: function CachedCanvases_getCanvas(id, width, height, - trackTransform) { - var canvasEntry; - if (id in cache) { - canvasEntry = cache[id]; - canvasEntry.canvas.width = width; - canvasEntry.canvas.height = height; - // reset canvas transform for emulated mozCurrentTransform, if needed - canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); - } else { - var canvas = createScratchCanvas(width, height); - var ctx = canvas.getContext('2d'); - if (trackTransform) { - addContextCurrentTransform(ctx); + // Path + constructPath: function CanvasGraphics_constructPath(ops, args) { + var ctx = this.ctx; + var current = this.current; + var x = current.x, y = current.y; + for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { + switch (ops[i] | 0) { + case OPS.moveTo: + x = args[j++]; + y = args[j++]; + ctx.moveTo(x, y); + break; + case OPS.lineTo: + x = args[j++]; + y = args[j++]; + ctx.lineTo(x, y); + break; + case OPS.curveTo: + x = args[j + 4]; + y = args[j + 5]; + ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], + x, y); + j += 6; + break; + case OPS.curveTo2: + ctx.bezierCurveTo(x, y, args[j], args[j + 1], + args[j + 2], args[j + 3]); + x = args[j + 2]; + y = args[j + 3]; + j += 4; + break; + case OPS.curveTo3: + x = args[j + 2]; + y = args[j + 3]; + ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); + j += 4; + break; + case OPS.closePath: + ctx.closePath(); + break; } - cache[id] = canvasEntry = {canvas: canvas, context: ctx}; } - return canvasEntry; + current.setCurrentPoint(x, y); }, - clear: function () { - for (var id in cache) { - var canvasEntry = cache[id]; - // Zeroing the width and height causes Firefox to release graphics - // resources immediately, which can greatly reduce memory consumption. - canvasEntry.canvas.width = 0; - canvasEntry.canvas.height = 0; - delete cache[id]; + closePath: function CanvasGraphics_closePath() { + this.ctx.closePath(); + }, + rectangle: function CanvasGraphics_rectangle(x, y, width, height) { + if (width === 0) { + width = this.getSinglePixelWidth(); + } + if (height === 0) { + height = this.getSinglePixelWidth(); } - } - }; -})(); -function compileType3Glyph(imgData) { - var POINT_TO_PROCESS_LIMIT = 1000; + this.ctx.rect(x, y, width, height); + }, + stroke: function CanvasGraphics_stroke(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var strokeColor = this.current.strokeColor; + if (this.current.lineWidth === 0) { + ctx.lineWidth = this.getSinglePixelWidth(); + } + // For stroke we want to temporarily change the global alpha to the + // stroking alpha. + ctx.globalAlpha = this.current.strokeAlpha; + if (strokeColor && strokeColor.hasOwnProperty('type') && + strokeColor.type === 'Pattern') { + // for patterns, we transform to pattern space, calculate + // the pattern, call stroke, and restore to user space + ctx.save(); + ctx.strokeStyle = strokeColor.getPattern(ctx, this); + ctx.stroke(); + ctx.restore(); + } else { + ctx.stroke(); + } + if (consumePath) { + this.consumePath(); + } + // Restore the global alpha to the fill alpha + ctx.globalAlpha = this.current.fillAlpha; + }, + closeStroke: function CanvasGraphics_closeStroke() { + this.closePath(); + this.stroke(); + }, + fill: function CanvasGraphics_fill(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var fillColor = this.current.fillColor; + var needRestore = false; - var width = imgData.width, height = imgData.height; - var i, j, j0, width1 = width + 1; - var points = new Uint8Array(width1 * (height + 1)); - var POINT_TYPES = - new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); + if (fillColor && fillColor.hasOwnProperty('type') && + fillColor.type === 'Pattern') { + ctx.save(); + ctx.fillStyle = fillColor.getPattern(ctx, this); + needRestore = true; + } - // decodes bit-packed mask data - var lineSize = (width + 7) & ~7, data0 = imgData.data; - var data = new Uint8Array(lineSize * height), pos = 0, ii; - for (i = 0, ii = data0.length; i < ii; i++) { - var mask = 128, elem = data0[i]; - while (mask > 0) { - data[pos++] = (elem & mask) ? 0 : 255; - mask >>= 1; - } - } + if (this.pendingEOFill) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.fill(); + ctx.mozFillRule = 'nonzero'; + } else { + try { + ctx.fill('evenodd'); + } catch (ex) { + // shouldn't really happen, but browsers might think differently + ctx.fill(); + } + } + this.pendingEOFill = false; + } else { + ctx.fill(); + } - // finding iteresting points: every point is located between mask pixels, - // so there will be points of the (width + 1)x(height + 1) grid. Every point - // will have flags assigned based on neighboring mask pixels: - // 4 | 8 - // --P-- - // 2 | 1 - // We are interested only in points with the flags: - // - outside corners: 1, 2, 4, 8; - // - inside corners: 7, 11, 13, 14; - // - and, intersections: 5, 10. - var count = 0; - pos = 0; - if (data[pos] !== 0) { - points[0] = 1; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j] = data[pos] ? 2 : 1; - ++count; - } - pos++; - } - if (data[pos] !== 0) { - points[j] = 2; - ++count; - } - for (i = 1; i < height; i++) { - pos = i * lineSize; - j0 = i * width1; - if (data[pos - lineSize] !== data[pos]) { - points[j0] = data[pos] ? 1 : 8; - ++count; - } - // 'sum' is the position of the current pixel configuration in the 'TYPES' - // array (in order 8-1-2-4, so we can use '>>2' to shift the column). - var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); - for (j = 1; j < width; j++) { - sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + - (data[pos - lineSize + 1] ? 8 : 0); - if (POINT_TYPES[sum]) { - points[j0 + j] = POINT_TYPES[sum]; - ++count; + if (needRestore) { + ctx.restore(); } - pos++; - } - if (data[pos - lineSize] !== data[pos]) { - points[j0 + j] = data[pos] ? 2 : 4; - ++count; - } + if (consumePath) { + this.consumePath(); + } + }, + eoFill: function CanvasGraphics_eoFill() { + this.pendingEOFill = true; + this.fill(); + }, + fillStroke: function CanvasGraphics_fillStroke() { + this.fill(false); + this.stroke(false); - if (count > POINT_TO_PROCESS_LIMIT) { - return null; - } - } + this.consumePath(); + }, + eoFillStroke: function CanvasGraphics_eoFillStroke() { + this.pendingEOFill = true; + this.fillStroke(); + }, + closeFillStroke: function CanvasGraphics_closeFillStroke() { + this.closePath(); + this.fillStroke(); + }, + closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { + this.pendingEOFill = true; + this.closePath(); + this.fillStroke(); + }, + endPath: function CanvasGraphics_endPath() { + this.consumePath(); + }, - pos = lineSize * (height - 1); - j0 = i * width1; - if (data[pos] !== 0) { - points[j0] = 8; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j0 + j] = data[pos] ? 4 : 8; - ++count; - } - pos++; - } - if (data[pos] !== 0) { - points[j0 + j] = 4; - ++count; - } - if (count > POINT_TO_PROCESS_LIMIT) { - return null; - } + // Clipping + clip: function CanvasGraphics_clip() { + this.pendingClip = NORMAL_CLIP; + }, + eoClip: function CanvasGraphics_eoClip() { + this.pendingClip = EO_CLIP; + }, - // building outlines - var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); - var outlines = []; - for (i = 0; count && i <= height; i++) { - var p = i * width1; - var end = p + width; - while (p < end && !points[p]) { - p++; - } - if (p === end) { - continue; - } - var coords = [p % width1, i]; + // Text + beginText: function CanvasGraphics_beginText() { + this.current.textMatrix = IDENTITY_MATRIX; + this.current.textMatrixScale = 1; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + endText: function CanvasGraphics_endText() { + var paths = this.pendingTextPaths; + var ctx = this.ctx; + if (paths === undefined) { + ctx.beginPath(); + return; + } - var type = points[p], p0 = p, pp; - do { - var step = steps[type]; - do { - p += step; - } while (!points[p]); + ctx.save(); + ctx.beginPath(); + for (var i = 0; i < paths.length; i++) { + var path = paths[i]; + ctx.setTransform.apply(ctx, path.transform); + ctx.translate(path.x, path.y); + path.addToPath(ctx, path.fontSize); + } + ctx.restore(); + ctx.clip(); + ctx.beginPath(); + delete this.pendingTextPaths; + }, + setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { + this.current.charSpacing = spacing; + }, + setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { + this.current.wordSpacing = spacing; + }, + setHScale: function CanvasGraphics_setHScale(scale) { + this.current.textHScale = scale / 100; + }, + setLeading: function CanvasGraphics_setLeading(leading) { + this.current.leading = -leading; + }, + setFont: function CanvasGraphics_setFont(fontRefName, size) { + var fontObj = this.commonObjs.get(fontRefName); + var current = this.current; - pp = points[p]; - if (pp !== 5 && pp !== 10) { - // set new direction - type = pp; - // delete mark - points[p] = 0; - } else { // type is 5 or 10, ie, a crossing - // set new direction - type = pp & ((0x33 * type) >> 4); - // set new type for "future hit" - points[p] &= (type >> 2 | type << 2); + if (!fontObj) { + error('Can\'t find font for ' + fontRefName); } - coords.push(p % width1); - coords.push((p / width1) | 0); - --count; - } while (p0 !== p); - outlines.push(coords); - --i; - } + current.fontMatrix = (fontObj.fontMatrix ? + fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - var drawOutline = function(c) { - c.save(); - // the path shall be painted in [0..1]x[0..1] space - c.scale(1 / width, -1 / height); - c.translate(0, -height); - c.beginPath(); - for (var i = 0, ii = outlines.length; i < ii; i++) { - var o = outlines[i]; - c.moveTo(o[0], o[1]); - for (var j = 2, jj = o.length; j < jj; j += 2) { - c.lineTo(o[j], o[j+1]); + // A valid matrix needs all main diagonal elements to be non-zero + // This also ensures we bypass FF bugzilla bug #719844. + if (current.fontMatrix[0] === 0 || + current.fontMatrix[3] === 0) { + warn('Invalid font matrix for font ' + fontRefName); } - } - c.fill(); - c.beginPath(); - c.restore(); - }; - return drawOutline; -} + // The spec for Tf (setFont) says that 'size' specifies the font 'scale', + // and in some docs this can be negative (inverted x-y axes). + if (size < 0) { + size = -size; + current.fontDirection = -1; + } else { + current.fontDirection = 1; + } -var CanvasExtraState = (function CanvasExtraStateClosure() { - function CanvasExtraState(old) { - // Are soft masks and alpha values shapes or opacities? - this.alphaIsShape = false; - this.fontSize = 0; - this.fontSizeScale = 1; - this.textMatrix = IDENTITY_MATRIX; - this.textMatrixScale = 1; - this.fontMatrix = FONT_IDENTITY_MATRIX; - this.leading = 0; - // Current point (in user coordinates) - this.x = 0; - this.y = 0; - // Start of text line (in text coordinates) - this.lineX = 0; - this.lineY = 0; - // Character and word spacing - this.charSpacing = 0; - this.wordSpacing = 0; - this.textHScale = 1; - this.textRenderingMode = TextRenderingMode.FILL; - this.textRise = 0; - // Default fore and background colors - this.fillColor = '#000000'; - this.strokeColor = '#000000'; - // Note: fill alpha applies to all non-stroking operations - this.fillAlpha = 1; - this.strokeAlpha = 1; - this.lineWidth = 1; - this.activeSMask = null; // nonclonable field (see the save method below) + this.current.font = fontObj; + this.current.fontSize = size; - this.old = old; - } + if (fontObj.isType3Font) { + return; // we don't need ctx.font for Type3 fonts + } - CanvasExtraState.prototype = { - clone: function CanvasExtraState_clone() { - return Object.create(this); - }, - setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { - this.x = x; - this.y = y; - } - }; - return CanvasExtraState; -})(); + var name = fontObj.loadedName || 'sans-serif'; + var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); -var CanvasGraphics = (function CanvasGraphicsClosure() { - // Defines the time the executeOperatorList is going to be executing - // before it stops and shedules a continue of execution. - var EXECUTION_TIME = 15; - // Defines the number of steps before checking the execution time - var EXECUTION_STEPS = 10; - - function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { - this.ctx = canvasCtx; - this.current = new CanvasExtraState(); - this.stateStack = []; - this.pendingClip = null; - this.pendingEOFill = false; - this.res = null; - this.xobjs = null; - this.commonObjs = commonObjs; - this.objs = objs; - this.imageLayer = imageLayer; - this.groupStack = []; - this.processingType3 = null; - // Patterns are painted relative to the initial page/form transform, see pdf - // spec 8.7.2 NOTE 1. - this.baseTransform = null; - this.baseTransformStack = []; - this.groupLevel = 0; - this.smaskStack = []; - this.smaskCounter = 0; - this.tempSMask = null; - if (canvasCtx) { - addContextCurrentTransform(canvasCtx); - } - } + var italic = fontObj.italic ? 'italic' : 'normal'; + var typeface = '"' + name + '", ' + fontObj.fallbackName; - function putBinaryImageData(ctx, imgData) { - if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { - ctx.putImageData(imgData, 0, 0); - return; - } + // Some font backends cannot handle fonts below certain size. + // Keeping the font at minimal size and using the fontSizeScale to change + // the current transformation matrix before the fillText/strokeText. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 + var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE; + this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 : + size / MIN_FONT_SIZE; - // Put the image data to the canvas in chunks, rather than putting the - // whole image at once. This saves JS memory, because the ImageData object - // is smaller. It also possibly saves C++ memory within the implementation - // of putImageData(). (E.g. in Firefox we make two short-lived copies of - // the data passed to putImageData()). |n| shouldn't be too small, however, - // because too many putImageData() calls will slow things down. - // - // Note: as written, if the last chunk is partial, the putImageData() call - // will (conceptually) put pixels past the bounds of the canvas. But - // that's ok; any such pixels are ignored. + var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; + this.ctx.font = rule; + }, + setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { + this.current.textRenderingMode = mode; + }, + setTextRise: function CanvasGraphics_setTextRise(rise) { + this.current.textRise = rise; + }, + moveText: function CanvasGraphics_moveText(x, y) { + this.current.x = this.current.lineX += x; + this.current.y = this.current.lineY += y; + }, + setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { + this.setLeading(-y); + this.moveText(x, y); + }, + setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { + this.current.textMatrix = [a, b, c, d, e, f]; + this.current.textMatrixScale = Math.sqrt(a * a + b * b); - var height = imgData.height, width = imgData.width; - var fullChunkHeight = 16; - var fracChunks = height / fullChunkHeight; - var fullChunks = Math.floor(fracChunks); - var totalChunks = Math.ceil(fracChunks); - var partialChunkHeight = height - fullChunks * fullChunkHeight; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + nextLine: function CanvasGraphics_nextLine() { + this.moveText(0, this.current.leading); + }, - var chunkImgData = ctx.createImageData(width, fullChunkHeight); - var srcPos = 0, destPos; - var src = imgData.data; - var dest = chunkImgData.data; - var i, j, thisChunkHeight, elemsInThisChunk; + paintChar: function CanvasGraphics_paintChar(character, x, y) { + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var textRenderingMode = current.textRenderingMode; + var fontSize = current.fontSize / current.fontSizeScale; + var fillStrokeMode = textRenderingMode & + TextRenderingMode.FILL_STROKE_MASK; + var isAddToPathSet = !!(textRenderingMode & + TextRenderingMode.ADD_TO_PATH_FLAG); - // There are multiple forms in which the pixel data can be passed, and - // imgData.kind tells us which one this is. - if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { - // Grayscale, 1 bit per pixel (i.e. black-and-white). - var srcLength = src.byteLength; - var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : - new Uint32ArrayView(dest); - var dest32DataLength = dest32.length; - var fullSrcDiff = (width + 7) >> 3; - var white = 0xFFFFFFFF; - var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? - 0xFF000000 : 0x000000FF; - for (i = 0; i < totalChunks; i++) { - thisChunkHeight = - (i < fullChunks) ? fullChunkHeight : partialChunkHeight; - destPos = 0; - for (j = 0; j < thisChunkHeight; j++) { - var srcDiff = srcLength - srcPos; - var k = 0; - var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; - var kEndUnrolled = kEnd & ~7; - var mask = 0; - var srcByte = 0; - for (; k < kEndUnrolled; k += 8) { - srcByte = src[srcPos++]; - dest32[destPos++] = (srcByte & 128) ? white : black; - dest32[destPos++] = (srcByte & 64) ? white : black; - dest32[destPos++] = (srcByte & 32) ? white : black; - dest32[destPos++] = (srcByte & 16) ? white : black; - dest32[destPos++] = (srcByte & 8) ? white : black; - dest32[destPos++] = (srcByte & 4) ? white : black; - dest32[destPos++] = (srcByte & 2) ? white : black; - dest32[destPos++] = (srcByte & 1) ? white : black; - } - for (; k < kEnd; k++) { - if (mask === 0) { - srcByte = src[srcPos++]; - mask = 128; - } + var addToPath; + if (font.disableFontFace || isAddToPathSet) { + addToPath = font.getPathGenerator(this.commonObjs, character); + } - dest32[destPos++] = (srcByte & mask) ? white : black; - mask >>= 1; - } + if (font.disableFontFace) { + ctx.save(); + ctx.translate(x, y); + ctx.beginPath(); + addToPath(ctx, fontSize); + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fill(); } - // We ran out of input. Make all remaining pixels transparent. - while (destPos < dest32DataLength) { - dest32[destPos++] = 0; + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.stroke(); + } + ctx.restore(); + } else { + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fillText(character, x, y); + } + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.strokeText(character, x, y); } - - ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); } - } else if (imgData.kind === ImageKind.RGBA_32BPP) { - // RGBA, 32-bits per pixel. - - j = 0; - elemsInThisChunk = width * fullChunkHeight * 4; - for (i = 0; i < fullChunks; i++) { - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - srcPos += elemsInThisChunk; - ctx.putImageData(chunkImgData, 0, j); - j += fullChunkHeight; - } - if (i < totalChunks) { - elemsInThisChunk = width * partialChunkHeight * 4; - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - ctx.putImageData(chunkImgData, 0, j); + if (isAddToPathSet) { + var paths = this.pendingTextPaths || (this.pendingTextPaths = []); + paths.push({ + transform: ctx.mozCurrentTransform, + x: x, + y: y, + fontSize: fontSize, + addToPath: addToPath + }); } + }, - } else if (imgData.kind === ImageKind.RGB_24BPP) { - // RGB, 24-bits per pixel. - thisChunkHeight = fullChunkHeight; - elemsInThisChunk = width * thisChunkHeight; - for (i = 0; i < totalChunks; i++) { - if (i >= fullChunks) { - thisChunkHeight =partialChunkHeight; - elemsInThisChunk = width * thisChunkHeight; - } - - destPos = 0; - for (j = elemsInThisChunk; j--;) { - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = 255; + get isFontSubpixelAAEnabled() { + // Checks if anti-aliasing is enabled when scaled text is painted. + // On Windows GDI scaled fonts looks bad. + var ctx = document.createElement('canvas').getContext('2d'); + ctx.scale(1.5, 1); + ctx.fillText('I', 0, 10); + var data = ctx.getImageData(0, 0, 10, 10).data; + var enabled = false; + for (var i = 3; i < data.length; i += 4) { + if (data[i] > 0 && data[i] < 255) { + enabled = true; + break; } - ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); } - } else { - error('bad image kind: ' + imgData.kind); - } - } + return shadow(this, 'isFontSubpixelAAEnabled', enabled); + }, - function putBinaryImageMask(ctx, imgData) { - var height = imgData.height, width = imgData.width; - var fullChunkHeight = 16; - var fracChunks = height / fullChunkHeight; - var fullChunks = Math.floor(fracChunks); - var totalChunks = Math.ceil(fracChunks); - var partialChunkHeight = height - fullChunks * fullChunkHeight; + showText: function CanvasGraphics_showText(glyphs) { + var current = this.current; + var font = current.font; + if (font.isType3Font) { + return this.showType3Text(glyphs); + } - var chunkImgData = ctx.createImageData(width, fullChunkHeight); - var srcPos = 0; - var src = imgData.data; - var dest = chunkImgData.data; + var fontSize = current.fontSize; + if (fontSize === 0) { + return; + } - for (var i = 0; i < totalChunks; i++) { - var thisChunkHeight = - (i < fullChunks) ? fullChunkHeight : partialChunkHeight; + var ctx = this.ctx; + var fontSizeScale = current.fontSizeScale; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var fontDirection = current.fontDirection; + var textHScale = current.textHScale * fontDirection; + var glyphsLength = glyphs.length; + var vertical = font.vertical; + var defaultVMetrics = font.defaultVMetrics; + var widthAdvanceScale = fontSize * current.fontMatrix[0]; - // Expand the mask so it can be used by the canvas. Any required - // inversion has already been handled. - var destPos = 3; // alpha component offset - for (var j = 0; j < thisChunkHeight; j++) { - var mask = 0; - for (var k = 0; k < width; k++) { - if (!mask) { - var elem = src[srcPos++]; - mask = 128; - } - dest[destPos] = (elem & mask) ? 0 : 255; - destPos += 4; - mask >>= 1; - } - } - ctx.putImageData(chunkImgData, 0, i * fullChunkHeight); - } - } + var simpleFillText = + current.textRenderingMode === TextRenderingMode.FILL && + !font.disableFontFace; - function copyCtxState(sourceCtx, destCtx) { - var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', - 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', - 'globalCompositeOperation', 'font']; - for (var i = 0, ii = properties.length; i < ii; i++) { - var property = properties[i]; - if (property in sourceCtx) { - destCtx[property] = sourceCtx[property]; - } - } - if ('setLineDash' in sourceCtx) { - destCtx.setLineDash(sourceCtx.getLineDash()); - destCtx.lineDashOffset = sourceCtx.lineDashOffset; - } else if ('mozDash' in sourceCtx) { - destCtx.mozDash = sourceCtx.mozDash; - destCtx.mozDashOffset = sourceCtx.mozDashOffset; - } - } + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y + current.textRise); - function composeSMaskBackdrop(bytes, r0, g0, b0) { - var length = bytes.length; - for (var i = 3; i < length; i += 4) { - var alpha = bytes[i]; - if (alpha === 0) { - bytes[i - 3] = r0; - bytes[i - 2] = g0; - bytes[i - 1] = b0; - } else if (alpha < 255) { - var alpha_ = 255 - alpha; - bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; - bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; - bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; + if (fontDirection > 0) { + ctx.scale(textHScale, -1); + } else { + ctx.scale(textHScale, 1); } - } - } - - function composeSMaskAlpha(maskData, layerData) { - var length = maskData.length; - var scale = 1 / 255; - for (var i = 3; i < length; i += 4) { - var alpha = maskData[i]; - layerData[i] = (layerData[i] * alpha * scale) | 0; - } - } - - function composeSMaskLuminosity(maskData, layerData) { - var length = maskData.length; - for (var i = 3; i < length; i += 4) { - var y = ((maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 - (maskData[i - 2] * 152) + // * 0.59 .... - (maskData[i - 1] * 28)) | 0; // * 0.11 .... - layerData[i] = (layerData[i] * y) >> 16; - } - } - - function genericComposeSMask(maskCtx, layerCtx, width, height, - subtype, backdrop) { - var hasBackdrop = !!backdrop; - var r0 = hasBackdrop ? backdrop[0] : 0; - var g0 = hasBackdrop ? backdrop[1] : 0; - var b0 = hasBackdrop ? backdrop[2] : 0; - - var composeFn; - if (subtype === 'Luminosity') { - composeFn = composeSMaskLuminosity; - } else { - composeFn = composeSMaskAlpha; - } - // processing image in chunks to save memory - var PIXELS_TO_PROCESS = 65536; - var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); - for (var row = 0; row < height; row += chunkSize) { - var chunkHeight = Math.min(chunkSize, height - row); - var maskData = maskCtx.getImageData(0, row, width, chunkHeight); - var layerData = layerCtx.getImageData(0, row, width, chunkHeight); + var lineWidth = current.lineWidth; + var scale = current.textMatrixScale; + if (scale === 0 || lineWidth === 0) { + lineWidth = this.getSinglePixelWidth(); + } else { + lineWidth /= scale; + } - if (hasBackdrop) { - composeSMaskBackdrop(maskData.data, r0, g0, b0); + if (fontSizeScale != 1.0) { + ctx.scale(fontSizeScale, fontSizeScale); + lineWidth /= fontSizeScale; } - composeFn(maskData.data, layerData.data); - maskCtx.putImageData(layerData, 0, row); - } - } + ctx.lineWidth = lineWidth; - function composeSMask(ctx, smask, layerCtx) { - var mask = smask.canvas; - var maskCtx = smask.context; + var x = 0, i; + for (i = 0; i < glyphsLength; ++i) { + var glyph = glyphs[i]; + if (glyph === null) { + // word break + x += fontDirection * wordSpacing; + continue; + } else if (isNum(glyph)) { + x += -glyph * fontSize * 0.001; + continue; + } - ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, - smask.offsetX, smask.offsetY); + var restoreNeeded = false; + var character = glyph.fontChar; + var accent = glyph.accent; + var scaledX, scaledY, scaledAccentX, scaledAccentY; + var width = glyph.width; + if (vertical) { + var vmetric, vx, vy; + vmetric = glyph.vmetric || defaultVMetrics; + vx = glyph.vmetric ? vmetric[1] : width * 0.5; + vx = -vx * widthAdvanceScale; + vy = vmetric[2] * widthAdvanceScale; - var backdrop = smask.backdrop || null; - if (WebGLUtils.isEnabled) { - var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, - {subtype: smask.subtype, backdrop: backdrop}); - ctx.setTransform(1, 0, 0, 1, 0, 0); - ctx.drawImage(composed, smask.offsetX, smask.offsetY); - return; - } - genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, - smask.subtype, backdrop); - ctx.drawImage(mask, 0, 0); - } + width = vmetric ? -vmetric[0] : width; + scaledX = vx / fontSizeScale; + scaledY = (x + vy) / fontSizeScale; + } else { + scaledX = x / fontSizeScale; + scaledY = 0; + } - var LINE_CAP_STYLES = ['butt', 'round', 'square']; - var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; - var NORMAL_CLIP = {}; - var EO_CLIP = {}; + if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) { + // some standard fonts may not have the exact width, trying to + // rescale per character + var measuredWidth = ctx.measureText(character).width * 1000 / + fontSize * fontSizeScale; + var characterScaleX = width / measuredWidth; + restoreNeeded = true; + ctx.save(); + ctx.scale(characterScaleX, 1); + scaledX /= characterScaleX; + } - CanvasGraphics.prototype = { + if (simpleFillText && !accent) { + // common case + ctx.fillText(character, scaledX, scaledY); + } else { + this.paintChar(character, scaledX, scaledY); + if (accent) { + scaledAccentX = scaledX + accent.offset.x / fontSizeScale; + scaledAccentY = scaledY - accent.offset.y / fontSizeScale; + this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); + } + } - beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) { - // For pdfs that use blend modes we have to clear the canvas else certain - // blend modes can look wrong since we'd be blending with a white - // backdrop. The problem with a transparent backdrop though is we then - // don't get sub pixel anti aliasing on text, so we fill with white if - // we can. - var width = this.ctx.canvas.width; - var height = this.ctx.canvas.height; - if (transparency) { - this.ctx.clearRect(0, 0, width, height); + var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; + x += charWidth; + + if (restoreNeeded) { + ctx.restore(); + } + } + if (vertical) { + current.y -= x * textHScale; } else { - this.ctx.mozOpaque = true; - this.ctx.save(); - this.ctx.fillStyle = 'rgb(255, 255, 255)'; - this.ctx.fillRect(0, 0, width, height); - this.ctx.restore(); + current.x += x * textHScale; } + ctx.restore(); + }, - var transform = viewport.transform; + showType3Text: function CanvasGraphics_showType3Text(glyphs) { + // Type3 fonts - each glyph is a "mini-PDF" + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var fontSize = current.fontSize; + var fontDirection = current.fontDirection; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var textHScale = current.textHScale * fontDirection; + var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; + var glyphsLength = glyphs.length; + var i, glyph, width; - this.ctx.save(); - this.ctx.transform.apply(this.ctx, transform); + if (fontSize === 0) { + return; + } - this.baseTransform = this.ctx.mozCurrentTransform.slice(); + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y); - if (this.imageLayer) { - this.imageLayer.beginLayout(); - } - }, + ctx.scale(textHScale, 1); - executeOperatorList: function CanvasGraphics_executeOperatorList( - operatorList, - executionStartIdx, continueCallback, - stepper) { - var argsArray = operatorList.argsArray; - var fnArray = operatorList.fnArray; - var i = executionStartIdx || 0; - var argsArrayLen = argsArray.length; - - // Sometimes the OperatorList to execute is empty. - if (argsArrayLen === i) { - return i; - } - - var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && - typeof continueCallback === 'function'); - var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; - var steps = 0; - - var commonObjs = this.commonObjs; - var objs = this.objs; - var fnId; - - while (true) { - if (stepper !== undefined && i === stepper.nextBreakPoint) { - stepper.breakIt(i, continueCallback); - return i; - } - - fnId = fnArray[i]; - - if (fnId !== OPS.dependency) { - this[fnId].apply(this, argsArray[i]); - } else { - var deps = argsArray[i]; - for (var n = 0, nn = deps.length; n < nn; n++) { - var depObjId = deps[n]; - var common = depObjId[0] === 'g' && depObjId[1] === '_'; - var objsPool = common ? commonObjs : objs; - - // If the promise isn't resolved yet, add the continueCallback - // to the promise and bail out. - if (!objsPool.isResolved(depObjId)) { - objsPool.get(depObjId, continueCallback); - return i; - } - } + for (i = 0; i < glyphsLength; ++i) { + glyph = glyphs[i]; + if (glyph === null) { + // word break + this.ctx.translate(wordSpacing, 0); + current.x += wordSpacing * textHScale; + continue; + } else if (isNum(glyph)) { + var spacingLength = -glyph * 0.001 * fontSize; + this.ctx.translate(spacingLength, 0); + current.x += spacingLength * textHScale; + continue; } - i++; - - // If the entire operatorList was executed, stop as were done. - if (i === argsArrayLen) { - return i; - } + this.processingType3 = glyph; + this.save(); + ctx.scale(fontSize, fontSize); + ctx.transform.apply(ctx, fontMatrix); + var operatorList = font.charProcOperatorList[glyph.operatorListId]; + this.executeOperatorList(operatorList); + this.restore(); - // If the execution took longer then a certain amount of time and - // `continueCallback` is specified, interrupt the execution. - if (chunkOperations && ++steps > EXECUTION_STEPS) { - if (Date.now() > endTime) { - continueCallback(); - return i; - } - steps = 0; - } + var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); + width = ((transformed[0] * fontSize + charSpacing) * fontDirection); - // If the operatorList isn't executed completely yet OR the execution - // time was short enough, do another execution round. + ctx.translate(width, 0); + current.x += width * textHScale; } + ctx.restore(); + this.processingType3 = null; }, - endDrawing: function CanvasGraphics_endDrawing() { - this.ctx.restore(); - CachedCanvases.clear(); - WebGLUtils.clear(); + // Type3 fonts + setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { + // We can safely ignore this since the width should be the same + // as the width in the Widths array. + }, + setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, + yWidth, + llx, + lly, + urx, + ury) { + // TODO According to the spec we're also suppose to ignore any operators + // that set color or include images while processing this type3 font. + this.rectangle(llx, lly, urx - llx, ury - lly); + this.clip(); + this.endPath(); + }, - if (this.imageLayer) { - this.imageLayer.endLayout(); + // Color + getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { + var pattern; + if (IR[0] === 'TilingPattern') { + var color = IR[1]; + pattern = new TilingPattern(IR, color, this.ctx, this.objs, + this.commonObjs, this.baseTransform); + } else { + pattern = getShadingPatternFromIR(IR); } + return pattern; }, - - // Graphics state - setLineWidth: function CanvasGraphics_setLineWidth(width) { - this.current.lineWidth = width; - this.ctx.lineWidth = width; + setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { + this.current.strokeColor = this.getColorN_Pattern(arguments); }, - setLineCap: function CanvasGraphics_setLineCap(style) { - this.ctx.lineCap = LINE_CAP_STYLES[style]; + setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { + this.current.fillColor = this.getColorN_Pattern(arguments); }, - setLineJoin: function CanvasGraphics_setLineJoin(style) { - this.ctx.lineJoin = LINE_JOIN_STYLES[style]; + setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { + var color = Util.makeCssRgb(arguments); + this.ctx.strokeStyle = color; + this.current.strokeColor = color; }, - setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { - this.ctx.miterLimit = limit; + setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { + var color = Util.makeCssRgb(arguments); + this.ctx.fillStyle = color; + this.current.fillColor = color; }, - setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { + + shadingFill: function CanvasGraphics_shadingFill(patternIR) { var ctx = this.ctx; - if ('setLineDash' in ctx) { - ctx.setLineDash(dashArray); - ctx.lineDashOffset = dashPhase; + + this.save(); + var pattern = getShadingPatternFromIR(patternIR); + ctx.fillStyle = pattern.getPattern(ctx, this, true); + + var inv = ctx.mozCurrentTransformInverse; + if (inv) { + var canvas = ctx.canvas; + var width = canvas.width; + var height = canvas.height; + + var bl = Util.applyTransform([0, 0], inv); + var br = Util.applyTransform([0, height], inv); + var ul = Util.applyTransform([width, 0], inv); + var ur = Util.applyTransform([width, height], inv); + + var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); + var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); + var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); + var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); + + this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); } else { - ctx.mozDash = dashArray; - ctx.mozDashOffset = dashPhase; + // HACK to draw the gradient onto an infinite rectangle. + // PDF gradients are drawn across the entire image while + // Canvas only allows gradients to be drawn in a rectangle + // The following bug should allow us to remove this. + // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 + + this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); } + + this.restore(); }, - setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { - // Maybe if we one day fully support color spaces this will be important - // for now we can ignore. - // TODO set rendering intent? + + // Images + beginInlineImage: function CanvasGraphics_beginInlineImage() { + error('Should not call beginInlineImage'); }, - setFlatness: function CanvasGraphics_setFlatness(flatness) { - // There's no way to control this with canvas, but we can safely ignore. - // TODO set flatness? + beginImageData: function CanvasGraphics_beginImageData() { + error('Should not call beginImageData'); }, - setGState: function CanvasGraphics_setGState(states) { - for (var i = 0, ii = states.length; i < ii; i++) { - var state = states[i]; - var key = state[0]; - var value = state[1]; - switch (key) { - case 'LW': - this.setLineWidth(value); - break; - case 'LC': - this.setLineCap(value); - break; - case 'LJ': - this.setLineJoin(value); - break; - case 'ML': - this.setMiterLimit(value); - break; - case 'D': - this.setDash(value[0], value[1]); - break; - case 'RI': - this.setRenderingIntent(value); - break; - case 'FL': - this.setFlatness(value); - break; - case 'Font': - this.setFont(value[0], value[1]); - break; - case 'CA': - this.current.strokeAlpha = state[1]; - break; - case 'ca': - this.current.fillAlpha = state[1]; - this.ctx.globalAlpha = state[1]; - break; - case 'BM': - if (value && value.name && (value.name !== 'Normal')) { - var mode = value.name.replace(/([A-Z])/g, - function(c) { - return '-' + c.toLowerCase(); - } - ).substring(1); - this.ctx.globalCompositeOperation = mode; - if (this.ctx.globalCompositeOperation !== mode) { - warn('globalCompositeOperation "' + mode + - '" is not supported'); - } - } else { - this.ctx.globalCompositeOperation = 'source-over'; - } - break; - case 'SMask': - if (this.current.activeSMask) { - this.endSMaskGroup(); - } - this.current.activeSMask = value ? this.tempSMask : null; - if (this.current.activeSMask) { - this.beginSMaskGroup(); - } - this.tempSMask = null; - break; - } + paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, + bbox) { + this.save(); + this.baseTransformStack.push(this.baseTransform); + + if (isArray(matrix) && 6 === matrix.length) { + this.transform.apply(this, matrix); + } + + this.baseTransform = this.ctx.mozCurrentTransform; + + if (isArray(bbox) && 4 === bbox.length) { + var width = bbox[2] - bbox[0]; + var height = bbox[3] - bbox[1]; + this.rectangle(bbox[0], bbox[1], width, height); + this.clip(); + this.endPath(); } }, - beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { - var activeSMask = this.current.activeSMask; - var drawnWidth = activeSMask.canvas.width; - var drawnHeight = activeSMask.canvas.height; - var cacheId = 'smaskGroupAt' + this.groupLevel; - var scratchCanvas = CachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); + paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { + this.restore(); + this.baseTransform = this.baseTransformStack.pop(); + }, + beginGroup: function CanvasGraphics_beginGroup(group) { + this.save(); var currentCtx = this.ctx; + // TODO non-isolated groups - according to Rik at adobe non-isolated + // group results aren't usually that different and they even have tools + // that ignore this setting. Notes from Rik on implmenting: + // - When you encounter an transparency group, create a new canvas with + // the dimensions of the bbox + // - copy the content from the previous canvas to the new canvas + // - draw as usual + // - remove the backdrop alpha: + // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha + // value of your transparency group and 'alphaBackdrop' the alpha of the + // backdrop + // - remove background color: + // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) + if (!group.isolated) { + info('TODO: Support non-isolated groups.'); + } + + // TODO knockout - supposedly possible with the clever use of compositing + // modes. + if (group.knockout) { + warn('Knockout groups not supported.'); + } + var currentTransform = currentCtx.mozCurrentTransform; - this.ctx.save(); + if (group.matrix) { + currentCtx.transform.apply(currentCtx, group.matrix); + } + assert(group.bbox, 'Bounding box is required.'); + + // Based on the current transform figure out how big the bounding box + // will actually be. + var bounds = Util.getAxialAlignedBoundingBox( + group.bbox, + currentCtx.mozCurrentTransform); + // Clip the bounding box to the current canvas. + var canvasBounds = [0, + 0, + currentCtx.canvas.width, + currentCtx.canvas.height]; + bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; + // Use ceil in case we're between sizes so we don't create canvas that is + // too small and make the canvas at least 1x1 pixels. + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); + var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); + var scaleX = 1, scaleY = 1; + if (drawnWidth > MAX_GROUP_SIZE) { + scaleX = drawnWidth / MAX_GROUP_SIZE; + drawnWidth = MAX_GROUP_SIZE; + } + if (drawnHeight > MAX_GROUP_SIZE) { + scaleY = drawnHeight / MAX_GROUP_SIZE; + drawnHeight = MAX_GROUP_SIZE; + } + var cacheId = 'groupAt' + this.groupLevel; + if (group.smask) { + // Using two cache entries is case if masks are used one after another. + cacheId += '_smask_' + ((this.smaskCounter++) % 2); + } + var scratchCanvas = CachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); var groupCtx = scratchCanvas.context; - groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); - groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); + + // Since we created a new canvas that is just the size of the bounding box + // we have to translate the group ctx. + groupCtx.scale(1 / scaleX, 1 / scaleY); + groupCtx.translate(-offsetX, -offsetY); groupCtx.transform.apply(groupCtx, currentTransform); + if (group.smask) { + // Saving state and cached mask to be used in setGState. + this.smaskStack.push({ + canvas: scratchCanvas.canvas, + context: groupCtx, + offsetX: offsetX, + offsetY: offsetY, + scaleX: scaleX, + scaleY: scaleY, + subtype: group.smask.subtype, + backdrop: group.smask.backdrop + }); + } else { + // Setup the current ctx so when the group is popped we draw it at the + // right location. + currentCtx.setTransform(1, 0, 0, 1, 0, 0); + currentCtx.translate(offsetX, offsetY); + currentCtx.scale(scaleX, scaleY); + } + // The transparency group inherits all off the current graphics state + // except the blend mode, soft mask, and alpha constants. copyCtxState(currentCtx, groupCtx); this.ctx = groupCtx; this.setGState([ @@ -4716,3478 +4693,2934 @@ var CanvasGraphics = (function CanvasGraphicsClosure() { this.groupStack.push(currentCtx); this.groupLevel++; }, - endSMaskGroup: function CanvasGraphics_endSMaskGroup() { - var groupCtx = this.ctx; + + endGroup: function CanvasGraphics_endGroup(group) { this.groupLevel--; + var groupCtx = this.ctx; this.ctx = this.groupStack.pop(); - - composeSMask(this.ctx, this.current.activeSMask, groupCtx); - this.ctx.restore(); - }, - save: function CanvasGraphics_save() { - this.ctx.save(); - var old = this.current; - this.stateStack.push(old); - this.current = old.clone(); - this.current.activeSMask = null; + // Turn off image smoothing to avoid sub pixel interpolation which can + // look kind of blurry for some pdfs. + if (this.ctx.imageSmoothingEnabled !== undefined) { + this.ctx.imageSmoothingEnabled = false; + } else { + this.ctx.mozImageSmoothingEnabled = false; + } + if (group.smask) { + this.tempSMask = this.smaskStack.pop(); + } else { + this.ctx.drawImage(groupCtx.canvas, 0, 0); + } + this.restore(); }, - restore: function CanvasGraphics_restore() { - if (this.stateStack.length !== 0) { - if (this.current.activeSMask !== null) { - this.endSMaskGroup(); - } - this.current = this.stateStack.pop(); - this.ctx.restore(); - } + beginAnnotations: function CanvasGraphics_beginAnnotations() { + this.save(); + this.current = new CanvasExtraState(); }, - transform: function CanvasGraphics_transform(a, b, c, d, e, f) { - this.ctx.transform(a, b, c, d, e, f); + + endAnnotations: function CanvasGraphics_endAnnotations() { + this.restore(); }, - // Path - constructPath: function CanvasGraphics_constructPath(ops, args) { - var ctx = this.ctx; - var current = this.current; - var x = current.x, y = current.y; - for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { - switch (ops[i] | 0) { - case OPS.moveTo: - x = args[j++]; - y = args[j++]; - ctx.moveTo(x, y); - break; - case OPS.lineTo: - x = args[j++]; - y = args[j++]; - ctx.lineTo(x, y); - break; - case OPS.curveTo: - x = args[j + 4]; - y = args[j + 5]; - ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], - x, y); - j += 6; - break; - case OPS.curveTo2: - ctx.bezierCurveTo(x, y, args[j], args[j + 1], - args[j + 2], args[j + 3]); - x = args[j + 2]; - y = args[j + 3]; - j += 4; - break; - case OPS.curveTo3: - x = args[j + 2]; - y = args[j + 3]; - ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); - j += 4; - break; - case OPS.closePath: - ctx.closePath(); - break; - } + beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, + matrix) { + this.save(); + + if (isArray(rect) && 4 === rect.length) { + var width = rect[2] - rect[0]; + var height = rect[3] - rect[1]; + this.rectangle(rect[0], rect[1], width, height); + this.clip(); + this.endPath(); } - current.setCurrentPoint(x, y); + + this.transform.apply(this, transform); + this.transform.apply(this, matrix); }, - closePath: function CanvasGraphics_closePath() { - this.ctx.closePath(); + + endAnnotation: function CanvasGraphics_endAnnotation() { + this.restore(); }, - rectangle: function CanvasGraphics_rectangle(x, y, width, height) { - if (width === 0) { - width = this.getSinglePixelWidth(); - } - if (height === 0) { - height = this.getSinglePixelWidth(); + + paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { + var domImage = this.objs.get(objId); + if (!domImage) { + warn('Dependent image isn\'t ready yet'); + return; } - this.ctx.rect(x, y, width, height); - }, - stroke: function CanvasGraphics_stroke(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + this.save(); + var ctx = this.ctx; - var strokeColor = this.current.strokeColor; - if (this.current.lineWidth === 0) { - ctx.lineWidth = this.getSinglePixelWidth(); - } - // For stroke we want to temporarily change the global alpha to the - // stroking alpha. - ctx.globalAlpha = this.current.strokeAlpha; - if (strokeColor && strokeColor.hasOwnProperty('type') && - strokeColor.type === 'Pattern') { - // for patterns, we transform to pattern space, calculate - // the pattern, call stroke, and restore to user space - ctx.save(); - ctx.strokeStyle = strokeColor.getPattern(ctx, this); - ctx.stroke(); - ctx.restore(); - } else { - ctx.stroke(); - } - if (consumePath) { - this.consumePath(); + // scale the image to the unit square + ctx.scale(1 / w, -1 / h); + + ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, + 0, -h, w, h); + if (this.imageLayer) { + var currentTransform = ctx.mozCurrentTransformInverse; + var position = this.getCanvasPosition(0, 0); + this.imageLayer.appendImage({ + objId: objId, + left: position[0], + top: position[1], + width: w / currentTransform[0], + height: h / currentTransform[3] + }); } - // Restore the global alpha to the fill alpha - ctx.globalAlpha = this.current.fillAlpha; - }, - closeStroke: function CanvasGraphics_closeStroke() { - this.closePath(); - this.stroke(); + this.restore(); }, - fill: function CanvasGraphics_fill(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + + paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { var ctx = this.ctx; - var fillColor = this.current.fillColor; - var needRestore = false; + var width = img.width, height = img.height; - if (fillColor && fillColor.hasOwnProperty('type') && - fillColor.type === 'Pattern') { - ctx.save(); - ctx.fillStyle = fillColor.getPattern(ctx, this); - needRestore = true; - } + var glyph = this.processingType3; - if (this.pendingEOFill) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.fill(); - ctx.mozFillRule = 'nonzero'; + if (COMPILE_TYPE3_GLYPHS && glyph && !('compiled' in glyph)) { + var MAX_SIZE_TO_COMPILE = 1000; + if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { + glyph.compiled = + compileType3Glyph({data: img.data, width: width, height: height}); } else { - try { - ctx.fill('evenodd'); - } catch (ex) { - // shouldn't really happen, but browsers might think differently - ctx.fill(); - } + glyph.compiled = null; } - this.pendingEOFill = false; - } else { - ctx.fill(); } - if (needRestore) { - ctx.restore(); - } - if (consumePath) { - this.consumePath(); + if (glyph && glyph.compiled) { + glyph.compiled(ctx); + return; } - }, - eoFill: function CanvasGraphics_eoFill() { - this.pendingEOFill = true; - this.fill(); - }, - fillStroke: function CanvasGraphics_fillStroke() { - this.fill(false); - this.stroke(false); - this.consumePath(); - }, - eoFillStroke: function CanvasGraphics_eoFillStroke() { - this.pendingEOFill = true; - this.fillStroke(); - }, - closeFillStroke: function CanvasGraphics_closeFillStroke() { - this.closePath(); - this.fillStroke(); - }, - closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { - this.pendingEOFill = true; - this.closePath(); - this.fillStroke(); - }, - endPath: function CanvasGraphics_endPath() { - this.consumePath(); - }, + var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - // Clipping - clip: function CanvasGraphics_clip() { - this.pendingClip = NORMAL_CLIP; - }, - eoClip: function CanvasGraphics_eoClip() { - this.pendingClip = EO_CLIP; - }, + putBinaryImageMask(maskCtx, img); - // Text - beginText: function CanvasGraphics_beginText() { - this.current.textMatrix = IDENTITY_MATRIX; - this.current.textMatrixScale = 1; - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; + maskCtx.globalCompositeOperation = 'source-in'; + + var fillColor = this.current.fillColor; + maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && + fillColor.type === 'Pattern') ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + this.paintInlineImageXObject(maskCanvas.canvas); }, - endText: function CanvasGraphics_endText() { - var paths = this.pendingTextPaths; + + paintImageMaskXObjectRepeat: + function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, + scaleY, positions) { + var width = imgData.width; + var height = imgData.height; var ctx = this.ctx; - if (paths === undefined) { - ctx.beginPath(); - return; - } - ctx.save(); - ctx.beginPath(); - for (var i = 0; i < paths.length; i++) { - var path = paths[i]; - ctx.setTransform.apply(ctx, path.transform); - ctx.translate(path.x, path.y); - path.addToPath(ctx, path.fontSize); - } - ctx.restore(); - ctx.clip(); - ctx.beginPath(); - delete this.pendingTextPaths; - }, - setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { - this.current.charSpacing = spacing; - }, - setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { - this.current.wordSpacing = spacing; - }, - setHScale: function CanvasGraphics_setHScale(scale) { - this.current.textHScale = scale / 100; - }, - setLeading: function CanvasGraphics_setLeading(leading) { - this.current.leading = -leading; - }, - setFont: function CanvasGraphics_setFont(fontRefName, size) { - var fontObj = this.commonObjs.get(fontRefName); - var current = this.current; + var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - if (!fontObj) { - error('Can\'t find font for ' + fontRefName); - } + putBinaryImageMask(maskCtx, imgData); - current.fontMatrix = (fontObj.fontMatrix ? - fontObj.fontMatrix : FONT_IDENTITY_MATRIX); + maskCtx.globalCompositeOperation = 'source-in'; - // A valid matrix needs all main diagonal elements to be non-zero - // This also ensures we bypass FF bugzilla bug #719844. - if (current.fontMatrix[0] === 0 || - current.fontMatrix[3] === 0) { - warn('Invalid font matrix for font ' + fontRefName); - } + var fillColor = this.current.fillColor; + maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && + fillColor.type === 'Pattern') ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); - // The spec for Tf (setFont) says that 'size' specifies the font 'scale', - // and in some docs this can be negative (inverted x-y axes). - if (size < 0) { - size = -size; - current.fontDirection = -1; - } else { - current.fontDirection = 1; + maskCtx.restore(); + + for (var i = 0, ii = positions.length; i < ii; i += 2) { + ctx.save(); + ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); } + }, - this.current.font = fontObj; - this.current.fontSize = size; + paintImageMaskXObjectGroup: + function CanvasGraphics_paintImageMaskXObjectGroup(images) { + var ctx = this.ctx; - if (fontObj.isType3Font) { - return; // we don't need ctx.font for Type3 fonts - } + for (var i = 0, ii = images.length; i < ii; i++) { + var image = images[i]; + var width = image.width, height = image.height; - var name = fontObj.loadedName || 'sans-serif'; - var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); + var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - var italic = fontObj.italic ? 'italic' : 'normal'; - var typeface = '"' + name + '", ' + fontObj.fallbackName; + putBinaryImageMask(maskCtx, image); - // Some font backends cannot handle fonts below certain size. - // Keeping the font at minimal size and using the fontSizeScale to change - // the current transformation matrix before the fillText/strokeText. - // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 - var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE; - this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 : - size / MIN_FONT_SIZE; + maskCtx.globalCompositeOperation = 'source-in'; - var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; - this.ctx.font = rule; - }, - setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { - this.current.textRenderingMode = mode; + var fillColor = this.current.fillColor; + maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && + fillColor.type === 'Pattern') ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + ctx.save(); + ctx.transform.apply(ctx, image.transform); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); + } }, - setTextRise: function CanvasGraphics_setTextRise(rise) { - this.current.textRise = rise; - }, - moveText: function CanvasGraphics_moveText(x, y) { - this.current.x = this.current.lineX += x; - this.current.y = this.current.lineY += y; - }, - setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { - this.setLeading(-y); - this.moveText(x, y); - }, - setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { - this.current.textMatrix = [a, b, c, d, e, f]; - this.current.textMatrixScale = Math.sqrt(a * a + b * b); - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; + paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; + } + + this.paintInlineImageXObject(imgData); }, - nextLine: function CanvasGraphics_nextLine() { - this.moveText(0, this.current.leading); + + paintImageXObjectRepeat: + function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, + positions) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; + } + + var width = imgData.width; + var height = imgData.height; + var map = []; + for (var i = 0, ii = positions.length; i < ii; i += 2) { + map.push({transform: [scaleX, 0, 0, scaleY, positions[i], + positions[i + 1]], x: 0, y: 0, w: width, h: height}); + } + this.paintInlineImageXObjectGroup(imgData, map); }, - paintChar: function CanvasGraphics_paintChar(character, x, y) { + paintInlineImageXObject: + function CanvasGraphics_paintInlineImageXObject(imgData) { + var width = imgData.width; + var height = imgData.height; var ctx = this.ctx; - var current = this.current; - var font = current.font; - var textRenderingMode = current.textRenderingMode; - var fontSize = current.fontSize / current.fontSizeScale; - var fillStrokeMode = textRenderingMode & - TextRenderingMode.FILL_STROKE_MASK; - var isAddToPathSet = !!(textRenderingMode & - TextRenderingMode.ADD_TO_PATH_FLAG); - var addToPath; - if (font.disableFontFace || isAddToPathSet) { - addToPath = font.getPathGenerator(this.commonObjs, character); - } + this.save(); + // scale the image to the unit square + ctx.scale(1 / width, -1 / height); - if (font.disableFontFace) { - ctx.save(); - ctx.translate(x, y); - ctx.beginPath(); - addToPath(ctx, fontSize); - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fill(); - } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.stroke(); - } - ctx.restore(); + var currentTransform = ctx.mozCurrentTransformInverse; + var a = currentTransform[0], b = currentTransform[1]; + var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); + var c = currentTransform[2], d = currentTransform[3]; + var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); + + var imgToPaint, tmpCanvas; + // instanceof HTMLElement does not work in jsdom node.js module + if (imgData instanceof HTMLElement || !imgData.data) { + imgToPaint = imgData; } else { - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fillText(character, x, y); + tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); + imgToPaint = tmpCanvas.canvas; + } + + var paintWidth = width, paintHeight = height; + var tmpCanvasId = 'prescale1'; + // Vertial or horizontal scaling shall not be more than 2 to not loose the + // pixels during drawImage operation, painting on the temporary canvas(es) + // that are twice smaller in size + while ((widthScale > 2 && paintWidth > 1) || + (heightScale > 2 && paintHeight > 1)) { + var newWidth = paintWidth, newHeight = paintHeight; + if (widthScale > 2 && paintWidth > 1) { + newWidth = Math.ceil(paintWidth / 2); + widthScale /= paintWidth / newWidth; } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.strokeText(character, x, y); + if (heightScale > 2 && paintHeight > 1) { + newHeight = Math.ceil(paintHeight / 2); + heightScale /= paintHeight / newHeight; } + tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight); + tmpCtx = tmpCanvas.context; + tmpCtx.clearRect(0, 0, newWidth, newHeight); + tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, 0, newWidth, newHeight); + imgToPaint = tmpCanvas.canvas; + paintWidth = newWidth; + paintHeight = newHeight; + tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; } + ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, -height, width, height); - if (isAddToPathSet) { - var paths = this.pendingTextPaths || (this.pendingTextPaths = []); - paths.push({ - transform: ctx.mozCurrentTransform, - x: x, - y: y, - fontSize: fontSize, - addToPath: addToPath + if (this.imageLayer) { + var position = this.getCanvasPosition(0, -height); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: width / currentTransform[0], + height: height / currentTransform[3] }); } + this.restore(); }, - get isFontSubpixelAAEnabled() { - // Checks if anti-aliasing is enabled when scaled text is painted. - // On Windows GDI scaled fonts looks bad. - var ctx = document.createElement('canvas').getContext('2d'); - ctx.scale(1.5, 1); - ctx.fillText('I', 0, 10); - var data = ctx.getImageData(0, 0, 10, 10).data; - var enabled = false; - for (var i = 3; i < data.length; i += 4) { - if (data[i] > 0 && data[i] < 255) { - enabled = true; - break; - } - } - return shadow(this, 'isFontSubpixelAAEnabled', enabled); - }, + paintInlineImageXObjectGroup: + function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { + var ctx = this.ctx; + var w = imgData.width; + var h = imgData.height; - showText: function CanvasGraphics_showText(glyphs) { - var current = this.current; - var font = current.font; - if (font.isType3Font) { - return this.showType3Text(glyphs); - } + var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); - var fontSize = current.fontSize; - if (fontSize === 0) { - return; + for (var i = 0, ii = map.length; i < ii; i++) { + var entry = map[i]; + ctx.save(); + ctx.transform.apply(ctx, entry.transform); + ctx.scale(1, -1); + ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, + 0, -1, 1, 1); + if (this.imageLayer) { + var position = this.getCanvasPosition(entry.x, entry.y); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: w, + height: h + }); + } + ctx.restore(); } + }, - var ctx = this.ctx; - var fontSizeScale = current.fontSizeScale; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var fontDirection = current.fontDirection; - var textHScale = current.textHScale * fontDirection; - var glyphsLength = glyphs.length; - var vertical = font.vertical; - var defaultVMetrics = font.defaultVMetrics; - var widthAdvanceScale = fontSize * current.fontMatrix[0]; - - var simpleFillText = - current.textRenderingMode === TextRenderingMode.FILL && - !font.disableFontFace; + paintSolidColorImageMask: + function CanvasGraphics_paintSolidColorImageMask() { + this.ctx.fillRect(0, 0, 1, 1); + }, - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y + current.textRise); + // Marked content - if (fontDirection > 0) { - ctx.scale(textHScale, -1); - } else { - ctx.scale(textHScale, 1); - } + markPoint: function CanvasGraphics_markPoint(tag) { + // TODO Marked content. + }, + markPointProps: function CanvasGraphics_markPointProps(tag, properties) { + // TODO Marked content. + }, + beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { + // TODO Marked content. + }, + beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( + tag, properties) { + // TODO Marked content. + }, + endMarkedContent: function CanvasGraphics_endMarkedContent() { + // TODO Marked content. + }, - var lineWidth = current.lineWidth; - var scale = current.textMatrixScale; - if (scale === 0 || lineWidth === 0) { - lineWidth = this.getSinglePixelWidth(); - } else { - lineWidth /= scale; - } + // Compatibility - if (fontSizeScale != 1.0) { - ctx.scale(fontSizeScale, fontSizeScale); - lineWidth /= fontSizeScale; - } + beginCompat: function CanvasGraphics_beginCompat() { + // TODO ignore undefined operators (should we do that anyway?) + }, + endCompat: function CanvasGraphics_endCompat() { + // TODO stop ignoring undefined operators + }, - ctx.lineWidth = lineWidth; + // Helper functions - var x = 0, i; - for (i = 0; i < glyphsLength; ++i) { - var glyph = glyphs[i]; - if (glyph === null) { - // word break - x += fontDirection * wordSpacing; - continue; - } else if (isNum(glyph)) { - x += -glyph * fontSize * 0.001; - continue; - } - - var restoreNeeded = false; - var character = glyph.fontChar; - var accent = glyph.accent; - var scaledX, scaledY, scaledAccentX, scaledAccentY; - var width = glyph.width; - if (vertical) { - var vmetric, vx, vy; - vmetric = glyph.vmetric || defaultVMetrics; - vx = glyph.vmetric ? vmetric[1] : width * 0.5; - vx = -vx * widthAdvanceScale; - vy = vmetric[2] * widthAdvanceScale; - - width = vmetric ? -vmetric[0] : width; - scaledX = vx / fontSizeScale; - scaledY = (x + vy) / fontSizeScale; + consumePath: function CanvasGraphics_consumePath() { + var ctx = this.ctx; + if (this.pendingClip) { + if (this.pendingClip === EO_CLIP) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.clip(); + ctx.mozFillRule = 'nonzero'; + } else { + try { + ctx.clip('evenodd'); + } catch (ex) { + // shouldn't really happen, but browsers might think differently + ctx.clip(); + } + } } else { - scaledX = x / fontSizeScale; - scaledY = 0; + ctx.clip(); } + this.pendingClip = null; + } + ctx.beginPath(); + }, + getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { + var inverse = this.ctx.mozCurrentTransformInverse; + // max of the current horizontal and vertical scale + return Math.sqrt(Math.max( + (inverse[0] * inverse[0] + inverse[1] * inverse[1]), + (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); + }, + getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { + var transform = this.ctx.mozCurrentTransform; + return [ + transform[0] * x + transform[2] * y + transform[4], + transform[1] * x + transform[3] * y + transform[5] + ]; + } + }; - if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) { - // some standard fonts may not have the exact width, trying to - // rescale per character - var measuredWidth = ctx.measureText(character).width * 1000 / - fontSize * fontSizeScale; - var characterScaleX = width / measuredWidth; - restoreNeeded = true; - ctx.save(); - ctx.scale(characterScaleX, 1); - scaledX /= characterScaleX; - } + for (var op in OPS) { + CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; + } - if (simpleFillText && !accent) { - // common case - ctx.fillText(character, scaledX, scaledY); - } else { - this.paintChar(character, scaledX, scaledY); - if (accent) { - scaledAccentX = scaledX + accent.offset.x / fontSizeScale; - scaledAccentY = scaledY - accent.offset.y / fontSizeScale; - this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); - } - } + return CanvasGraphics; +})(); - var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; - x += charWidth; - if (restoreNeeded) { - ctx.restore(); - } - } - if (vertical) { - current.y -= x * textHScale; - } else { - current.x += x * textHScale; - } - ctx.restore(); - }, - showType3Text: function CanvasGraphics_showType3Text(glyphs) { - // Type3 fonts - each glyph is a "mini-PDF" - var ctx = this.ctx; - var current = this.current; - var font = current.font; - var fontSize = current.fontSize; - var fontDirection = current.fontDirection; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var textHScale = current.textHScale * fontDirection; - var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; - var glyphsLength = glyphs.length; - var i, glyph, width; +var WebGLUtils = (function WebGLUtilsClosure() { + function loadShader(gl, code, shaderType) { + var shader = gl.createShader(shaderType); + gl.shaderSource(shader, code); + gl.compileShader(shader); + var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); + if (!compiled) { + var errorMsg = gl.getShaderInfoLog(shader); + throw new Error('Error during shader compilation: ' + errorMsg); + } + return shader; + } + function createVertexShader(gl, code) { + return loadShader(gl, code, gl.VERTEX_SHADER); + } + function createFragmentShader(gl, code) { + return loadShader(gl, code, gl.FRAGMENT_SHADER); + } + function createProgram(gl, shaders) { + var program = gl.createProgram(); + for (var i = 0, ii = shaders.length; i < ii; ++i) { + gl.attachShader(program, shaders[i]); + } + gl.linkProgram(program); + var linked = gl.getProgramParameter(program, gl.LINK_STATUS); + if (!linked) { + var errorMsg = gl.getProgramInfoLog(program); + throw new Error('Error during program linking: ' + errorMsg); + } + return program; + } + function createTexture(gl, image, textureId) { + gl.activeTexture(textureId); + var texture = gl.createTexture(); + gl.bindTexture(gl.TEXTURE_2D, texture); - if (fontSize === 0) { - return; - } + // Set the parameters so we can render any size image. + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y); + // Upload the image into the texture. + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); + return texture; + } - ctx.scale(textHScale, 1); + var currentGL, currentCanvas; + function generageGL() { + if (currentGL) { + return; + } + currentCanvas = document.createElement('canvas'); + currentGL = currentCanvas.getContext('webgl', + { premultipliedalpha: false }); + } - for (i = 0; i < glyphsLength; ++i) { - glyph = glyphs[i]; - if (glyph === null) { - // word break - this.ctx.translate(wordSpacing, 0); - current.x += wordSpacing * textHScale; - continue; - } else if (isNum(glyph)) { - var spacingLength = -glyph * 0.001 * fontSize; - this.ctx.translate(spacingLength, 0); - current.x += spacingLength * textHScale; - continue; - } + var smaskVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec2 a_texCoord; \ + \ + uniform vec2 u_resolution; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_texCoord = a_texCoord; \ + } '; - this.processingType3 = glyph; - this.save(); - ctx.scale(fontSize, fontSize); - ctx.transform.apply(ctx, fontMatrix); - var operatorList = font.charProcOperatorList[glyph.operatorListId]; - this.executeOperatorList(operatorList); - this.restore(); + var smaskFragmentShaderCode = '\ + precision mediump float; \ + \ + uniform vec4 u_backdrop; \ + uniform int u_subtype; \ + uniform sampler2D u_image; \ + uniform sampler2D u_mask; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec4 imageColor = texture2D(u_image, v_texCoord); \ + vec4 maskColor = texture2D(u_mask, v_texCoord); \ + if (u_backdrop.a > 0.0) { \ + maskColor.rgb = maskColor.rgb * maskColor.a + \ + u_backdrop.rgb * (1.0 - maskColor.a); \ + } \ + float lum; \ + if (u_subtype == 0) { \ + lum = maskColor.a; \ + } else { \ + lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ + maskColor.b * 0.11; \ + } \ + imageColor.a *= lum; \ + imageColor.rgb *= imageColor.a; \ + gl_FragColor = imageColor; \ + } '; - var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); - width = ((transformed[0] * fontSize + charSpacing) * fontDirection); + var smaskCache = null; - ctx.translate(width, 0); - current.x += width * textHScale; - } - ctx.restore(); - this.processingType3 = null; - }, + function initSmaskGL() { + var canvas, gl; - // Type3 fonts - setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { - // We can safely ignore this since the width should be the same - // as the width in the Widths array. - }, - setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, - yWidth, - llx, - lly, - urx, - ury) { - // TODO According to the spec we're also suppose to ignore any operators - // that set color or include images while processing this type3 font. - this.rectangle(llx, lly, urx - llx, ury - lly); - this.clip(); - this.endPath(); - }, - - // Color - getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { - var pattern; - if (IR[0] === 'TilingPattern') { - var color = IR[1]; - pattern = new TilingPattern(IR, color, this.ctx, this.objs, - this.commonObjs, this.baseTransform); - } else { - pattern = getShadingPatternFromIR(IR); - } - return pattern; - }, - setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { - this.current.strokeColor = this.getColorN_Pattern(arguments); - }, - setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { - this.current.fillColor = this.getColorN_Pattern(arguments); - }, - setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { - var color = Util.makeCssRgb(arguments); - this.ctx.strokeStyle = color; - this.current.strokeColor = color; - }, - setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { - var color = Util.makeCssRgb(arguments); - this.ctx.fillStyle = color; - this.current.fillColor = color; - }, + generageGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; - shadingFill: function CanvasGraphics_shadingFill(patternIR) { - var ctx = this.ctx; + // setup a GLSL program + var vertexShader = createVertexShader(gl, smaskVertexShaderCode); + var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); - this.save(); - var pattern = getShadingPatternFromIR(patternIR); - ctx.fillStyle = pattern.getPattern(ctx, this, true); + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); + cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); - var inv = ctx.mozCurrentTransformInverse; - if (inv) { - var canvas = ctx.canvas; - var width = canvas.width; - var height = canvas.height; + var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); + var texLayerLocation = gl.getUniformLocation(program, 'u_image'); + var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); - var bl = Util.applyTransform([0, 0], inv); - var br = Util.applyTransform([0, height], inv); - var ul = Util.applyTransform([width, 0], inv); - var ur = Util.applyTransform([width, height], inv); + // provide texture coordinates for the rectangle. + var texCoordBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0.0, 0.0, + 1.0, 0.0, + 0.0, 1.0, + 0.0, 1.0, + 1.0, 0.0, + 1.0, 1.0]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(texCoordLocation); + gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); - var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); - var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); - var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); - var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); + gl.uniform1i(texLayerLocation, 0); + gl.uniform1i(texMaskLocation, 1); - this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); - } else { - // HACK to draw the gradient onto an infinite rectangle. - // PDF gradients are drawn across the entire image while - // Canvas only allows gradients to be drawn in a rectangle - // The following bug should allow us to remove this. - // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 + smaskCache = cache; + } - this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); - } + function composeSMask(layer, mask, properties) { + var width = layer.width, height = layer.height; - this.restore(); - }, + if (!smaskCache) { + initSmaskGL(); + } + var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); - // Images - beginInlineImage: function CanvasGraphics_beginInlineImage() { - error('Should not call beginInlineImage'); - }, - beginImageData: function CanvasGraphics_beginImageData() { - error('Should not call beginImageData'); - }, + if (properties.backdrop) { + gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], + properties.backdrop[1], properties.backdrop[2], 1); + } else { + gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); + } + gl.uniform1i(cache.subtypeLocation, + properties.subtype === 'Luminosity' ? 1 : 0); - paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, - bbox) { - this.save(); - this.baseTransformStack.push(this.baseTransform); + // Create a textures + var texture = createTexture(gl, layer, gl.TEXTURE0); + var maskTexture = createTexture(gl, mask, gl.TEXTURE1); - if (isArray(matrix) && 6 === matrix.length) { - this.transform.apply(this, matrix); - } - this.baseTransform = this.ctx.mozCurrentTransform; + // Create a buffer and put a single clipspace rectangle in + // it (2 triangles) + var buffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, buffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0, 0, + width, 0, + 0, height, + 0, height, + width, 0, + width, height]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - if (isArray(bbox) && 4 === bbox.length) { - var width = bbox[2] - bbox[0]; - var height = bbox[3] - bbox[1]; - this.rectangle(bbox[0], bbox[1], width, height); - this.clip(); - this.endPath(); - } - }, + // draw + gl.clearColor(0, 0, 0, 0); + gl.enable(gl.BLEND); + gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); + gl.clear(gl.COLOR_BUFFER_BIT); - paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { - this.restore(); - this.baseTransform = this.baseTransformStack.pop(); - }, + gl.drawArrays(gl.TRIANGLES, 0, 6); - beginGroup: function CanvasGraphics_beginGroup(group) { - this.save(); - var currentCtx = this.ctx; - // TODO non-isolated groups - according to Rik at adobe non-isolated - // group results aren't usually that different and they even have tools - // that ignore this setting. Notes from Rik on implmenting: - // - When you encounter an transparency group, create a new canvas with - // the dimensions of the bbox - // - copy the content from the previous canvas to the new canvas - // - draw as usual - // - remove the backdrop alpha: - // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha - // value of your transparency group and 'alphaBackdrop' the alpha of the - // backdrop - // - remove background color: - // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) - if (!group.isolated) { - info('TODO: Support non-isolated groups.'); - } + gl.flush(); - // TODO knockout - supposedly possible with the clever use of compositing - // modes. - if (group.knockout) { - warn('Knockout groups not supported.'); - } + gl.deleteTexture(texture); + gl.deleteTexture(maskTexture); + gl.deleteBuffer(buffer); - var currentTransform = currentCtx.mozCurrentTransform; - if (group.matrix) { - currentCtx.transform.apply(currentCtx, group.matrix); - } - assert(group.bbox, 'Bounding box is required.'); + return canvas; + } - // Based on the current transform figure out how big the bounding box - // will actually be. - var bounds = Util.getAxialAlignedBoundingBox( - group.bbox, - currentCtx.mozCurrentTransform); - // Clip the bounding box to the current canvas. - var canvasBounds = [0, - 0, - currentCtx.canvas.width, - currentCtx.canvas.height]; - bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; - // Use ceil in case we're between sizes so we don't create canvas that is - // too small and make the canvas at least 1x1 pixels. - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); - var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); - var scaleX = 1, scaleY = 1; - if (drawnWidth > MAX_GROUP_SIZE) { - scaleX = drawnWidth / MAX_GROUP_SIZE; - drawnWidth = MAX_GROUP_SIZE; - } - if (drawnHeight > MAX_GROUP_SIZE) { - scaleY = drawnHeight / MAX_GROUP_SIZE; - drawnHeight = MAX_GROUP_SIZE; - } + var figuresVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec3 a_color; \ + \ + uniform vec2 u_resolution; \ + uniform vec2 u_scale; \ + uniform vec2 u_offset; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + vec2 position = (a_position + u_offset) * u_scale; \ + vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_color = vec4(a_color / 255.0, 1.0); \ + } '; - var cacheId = 'groupAt' + this.groupLevel; - if (group.smask) { - // Using two cache entries is case if masks are used one after another. - cacheId += '_smask_' + ((this.smaskCounter++) % 2); - } - var scratchCanvas = CachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); - var groupCtx = scratchCanvas.context; + var figuresFragmentShaderCode = '\ + precision mediump float; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + gl_FragColor = v_color; \ + } '; - // Since we created a new canvas that is just the size of the bounding box - // we have to translate the group ctx. - groupCtx.scale(1 / scaleX, 1 / scaleY); - groupCtx.translate(-offsetX, -offsetY); - groupCtx.transform.apply(groupCtx, currentTransform); + var figuresCache = null; - if (group.smask) { - // Saving state and cached mask to be used in setGState. - this.smaskStack.push({ - canvas: scratchCanvas.canvas, - context: groupCtx, - offsetX: offsetX, - offsetY: offsetY, - scaleX: scaleX, - scaleY: scaleY, - subtype: group.smask.subtype, - backdrop: group.smask.backdrop - }); - } else { - // Setup the current ctx so when the group is popped we draw it at the - // right location. - currentCtx.setTransform(1, 0, 0, 1, 0, 0); - currentCtx.translate(offsetX, offsetY); - currentCtx.scale(scaleX, scaleY); - } - // The transparency group inherits all off the current graphics state - // except the blend mode, soft mask, and alpha constants. - copyCtxState(currentCtx, groupCtx); - this.ctx = groupCtx; - this.setGState([ - ['BM', 'Normal'], - ['ca', 1], - ['CA', 1] - ]); - this.groupStack.push(currentCtx); - this.groupLevel++; - }, + function initFiguresGL() { + var canvas, gl; - endGroup: function CanvasGraphics_endGroup(group) { - this.groupLevel--; - var groupCtx = this.ctx; - this.ctx = this.groupStack.pop(); - // Turn off image smoothing to avoid sub pixel interpolation which can - // look kind of blurry for some pdfs. - if (this.ctx.imageSmoothingEnabled !== undefined) { - this.ctx.imageSmoothingEnabled = false; - } else { - this.ctx.mozImageSmoothingEnabled = false; - } - if (group.smask) { - this.tempSMask = this.smaskStack.pop(); - } else { - this.ctx.drawImage(groupCtx.canvas, 0, 0); - } - this.restore(); - }, + generageGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; - beginAnnotations: function CanvasGraphics_beginAnnotations() { - this.save(); - this.current = new CanvasExtraState(); - }, + // setup a GLSL program + var vertexShader = createVertexShader(gl, figuresVertexShaderCode); + var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); - endAnnotations: function CanvasGraphics_endAnnotations() { - this.restore(); - }, + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); + cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.colorLocation = gl.getAttribLocation(program, 'a_color'); - beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, - matrix) { - this.save(); + figuresCache = cache; + } - if (isArray(rect) && 4 === rect.length) { - var width = rect[2] - rect[0]; - var height = rect[3] - rect[1]; - this.rectangle(rect[0], rect[1], width, height); - this.clip(); - this.endPath(); - } + function drawFigures(width, height, backgroundColor, figures, context) { + if (!figuresCache) { + initFiguresGL(); + } + var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; - this.transform.apply(this, transform); - this.transform.apply(this, matrix); - }, + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); - endAnnotation: function CanvasGraphics_endAnnotation() { - this.restore(); - }, + // count triangle points + var count = 0; + var i, ii, rows; + for (i = 0, ii = figures.length; i < ii; i++) { + switch (figures[i].type) { + case 'lattice': + rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; + count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; + break; + case 'triangles': + count += figures[i].coords.length; + break; + } + } + // transfer data + var coords = new Float32Array(count * 2); + var colors = new Uint8Array(count * 3); + var coordsMap = context.coords, colorsMap = context.colors; + var pIndex = 0, cIndex = 0; + for (i = 0, ii = figures.length; i < ii; i++) { + var figure = figures[i], ps = figure.coords, cs = figure.colors; + switch (figure.type) { + case 'lattice': + var cols = figure.verticesPerRow; + rows = (ps.length / cols) | 0; + for (var row = 1; row < rows; row++) { + var offset = row * cols + 1; + for (var col = 1; col < cols; col++, offset++) { + coords[pIndex] = coordsMap[ps[offset - cols - 1]]; + coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; + coords[pIndex + 2] = coordsMap[ps[offset - cols]]; + coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; + coords[pIndex + 4] = coordsMap[ps[offset - 1]]; + coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; + colors[cIndex] = colorsMap[cs[offset - cols - 1]]; + colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; + colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; + colors[cIndex + 3] = colorsMap[cs[offset - cols]]; + colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; + colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; + colors[cIndex + 6] = colorsMap[cs[offset - 1]]; + colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; + colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; - paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { - var domImage = this.objs.get(objId); - if (!domImage) { - warn('Dependent image isn\'t ready yet'); - return; + coords[pIndex + 6] = coords[pIndex + 2]; + coords[pIndex + 7] = coords[pIndex + 3]; + coords[pIndex + 8] = coords[pIndex + 4]; + coords[pIndex + 9] = coords[pIndex + 5]; + coords[pIndex + 10] = coordsMap[ps[offset]]; + coords[pIndex + 11] = coordsMap[ps[offset] + 1]; + colors[cIndex + 9] = colors[cIndex + 3]; + colors[cIndex + 10] = colors[cIndex + 4]; + colors[cIndex + 11] = colors[cIndex + 5]; + colors[cIndex + 12] = colors[cIndex + 6]; + colors[cIndex + 13] = colors[cIndex + 7]; + colors[cIndex + 14] = colors[cIndex + 8]; + colors[cIndex + 15] = colorsMap[cs[offset]]; + colors[cIndex + 16] = colorsMap[cs[offset] + 1]; + colors[cIndex + 17] = colorsMap[cs[offset] + 2]; + pIndex += 12; + cIndex += 18; + } + } + break; + case 'triangles': + for (var j = 0, jj = ps.length; j < jj; j++) { + coords[pIndex] = coordsMap[ps[j]]; + coords[pIndex + 1] = coordsMap[ps[j] + 1]; + colors[cIndex] = colorsMap[cs[i]]; + colors[cIndex + 1] = colorsMap[cs[j] + 1]; + colors[cIndex + 2] = colorsMap[cs[j] + 2]; + pIndex += 2; + cIndex += 3; + } + break; } + } - this.save(); + // draw + if (backgroundColor) { + gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, + backgroundColor[2] / 255, 1.0); + } else { + gl.clearColor(0, 0, 0, 0); + } + gl.clear(gl.COLOR_BUFFER_BIT); - var ctx = this.ctx; - // scale the image to the unit square - ctx.scale(1 / w, -1 / h); + var coordsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, - 0, -h, w, h); - if (this.imageLayer) { - var currentTransform = ctx.mozCurrentTransformInverse; - var position = this.getCanvasPosition(0, 0); - this.imageLayer.appendImage({ - objId: objId, - left: position[0], - top: position[1], - width: w / currentTransform[0], - height: h / currentTransform[3] - }); - } - this.restore(); - }, + var colorsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.colorLocation); + gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, + 0, 0); - paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { - var ctx = this.ctx; - var width = img.width, height = img.height; + gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); + gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); - var glyph = this.processingType3; + gl.drawArrays(gl.TRIANGLES, 0, count); - if (COMPILE_TYPE3_GLYPHS && glyph && !('compiled' in glyph)) { - var MAX_SIZE_TO_COMPILE = 1000; - if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { - glyph.compiled = - compileType3Glyph({data: img.data, width: width, height: height}); - } else { - glyph.compiled = null; - } - } + gl.flush(); - if (glyph && glyph.compiled) { - glyph.compiled(ctx); - return; - } - - var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - - putBinaryImageMask(maskCtx, img); - - maskCtx.globalCompositeOperation = 'source-in'; + gl.deleteBuffer(coordsBuffer); + gl.deleteBuffer(colorsBuffer); - var fillColor = this.current.fillColor; - maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && - fillColor.type === 'Pattern') ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); + return canvas; + } - maskCtx.restore(); + function cleanup() { + smaskCache = null; + figuresCache = null; + } - this.paintInlineImageXObject(maskCanvas.canvas); + return { + get isEnabled() { + if (PDFJS.disableWebGL) { + return false; + } + var enabled = false; + try { + generageGL(); + enabled = !!currentGL; + } catch (e) { } + return shadow(this, 'isEnabled', enabled); }, + composeSMask: composeSMask, + drawFigures: drawFigures, + clear: cleanup + }; +})(); - paintImageMaskXObjectRepeat: - function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, - scaleY, positions) { - var width = imgData.width; - var height = imgData.height; - var ctx = this.ctx; - - var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - putBinaryImageMask(maskCtx, imgData); +var ShadingIRs = {}; - maskCtx.globalCompositeOperation = 'source-in'; +ShadingIRs.RadialAxial = { + fromIR: function RadialAxial_fromIR(raw) { + var type = raw[1]; + var colorStops = raw[2]; + var p0 = raw[3]; + var p1 = raw[4]; + var r0 = raw[5]; + var r1 = raw[6]; + return { + type: 'Pattern', + getPattern: function RadialAxial_getPattern(ctx) { + var grad; + if (type === 'axial') { + grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); + } else if (type === 'radial') { + grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); + } - var fillColor = this.current.fillColor; - maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && - fillColor.type === 'Pattern') ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); + for (var i = 0, ii = colorStops.length; i < ii; ++i) { + var c = colorStops[i]; + grad.addColorStop(c[0], c[1]); + } + return grad; + } + }; + } +}; - maskCtx.restore(); +var createMeshCanvas = (function createMeshCanvasClosure() { + function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { + // Very basic Gouraud-shaded triangle rasterization algorithm. + var coords = context.coords, colors = context.colors; + var bytes = data.data, rowSize = data.width * 4; + var tmp; + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + if (coords[p2 + 1] > coords[p3 + 1]) { + tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; + } + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + var x1 = (coords[p1] + context.offsetX) * context.scaleX; + var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; + var x2 = (coords[p2] + context.offsetX) * context.scaleX; + var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; + var x3 = (coords[p3] + context.offsetX) * context.scaleX; + var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; + if (y1 >= y3) { + return; + } + var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; + var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; + var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - ctx.save(); - ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); + var minY = Math.round(y1), maxY = Math.round(y3); + var xa, car, cag, cab; + var xb, cbr, cbg, cbb; + var k; + for (var y = minY; y <= maxY; y++) { + if (y < y2) { + k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); + xa = x1 - (x1 - x2) * k; + car = c1r - (c1r - c2r) * k; + cag = c1g - (c1g - c2g) * k; + cab = c1b - (c1b - c2b) * k; + } else { + k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); + xa = x2 - (x2 - x3) * k; + car = c2r - (c2r - c3r) * k; + cag = c2g - (c2g - c3g) * k; + cab = c2b - (c2b - c3b) * k; } - }, - - paintImageMaskXObjectGroup: - function CanvasGraphics_paintImageMaskXObjectGroup(images) { - var ctx = this.ctx; + k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); + xb = x1 - (x1 - x3) * k; + cbr = c1r - (c1r - c3r) * k; + cbg = c1g - (c1g - c3g) * k; + cbb = c1b - (c1b - c3b) * k; + var x1_ = Math.round(Math.min(xa, xb)); + var x2_ = Math.round(Math.max(xa, xb)); + var j = rowSize * y + x1_ * 4; + for (var x = x1_; x <= x2_; x++) { + k = (xa - x) / (xa - xb); + k = k < 0 ? 0 : k > 1 ? 1 : k; + bytes[j++] = (car - (car - cbr) * k) | 0; + bytes[j++] = (cag - (cag - cbg) * k) | 0; + bytes[j++] = (cab - (cab - cbb) * k) | 0; + bytes[j++] = 255; + } + } + } - for (var i = 0, ii = images.length; i < ii; i++) { - var image = images[i]; - var width = image.width, height = image.height; + function drawFigure(data, figure, context) { + var ps = figure.coords; + var cs = figure.colors; + var i, ii; + switch (figure.type) { + case 'lattice': + var verticesPerRow = figure.verticesPerRow; + var rows = Math.floor(ps.length / verticesPerRow) - 1; + var cols = verticesPerRow - 1; + for (i = 0; i < rows; i++) { + var q = i * verticesPerRow; + for (var j = 0; j < cols; j++, q++) { + drawTriangle(data, context, + ps[q], ps[q + 1], ps[q + verticesPerRow], + cs[q], cs[q + 1], cs[q + verticesPerRow]); + drawTriangle(data, context, + ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], + cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); + } + } + break; + case 'triangles': + for (i = 0, ii = ps.length; i < ii; i += 3) { + drawTriangle(data, context, + ps[i], ps[i + 1], ps[i + 2], + cs[i], cs[i + 1], cs[i + 2]); + } + break; + default: + error('illigal figure'); + break; + } + } - var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); + function createMeshCanvas(bounds, combinesScale, coords, colors, figures, + backgroundColor) { + // we will increase scale on some weird factor to let antialiasing take + // care of "rough" edges + var EXPECTED_SCALE = 1.1; + // MAX_PATTERN_SIZE is used to avoid OOM situation. + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - putBinaryImageMask(maskCtx, image); + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var boundsWidth = Math.ceil(bounds[2]) - offsetX; + var boundsHeight = Math.ceil(bounds[3]) - offsetY; - maskCtx.globalCompositeOperation = 'source-in'; + var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var scaleX = boundsWidth / width; + var scaleY = boundsHeight / height; - var fillColor = this.current.fillColor; - maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') && - fillColor.type === 'Pattern') ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); + var context = { + coords: coords, + colors: colors, + offsetX: -offsetX, + offsetY: -offsetY, + scaleX: 1 / scaleX, + scaleY: 1 / scaleY + }; - maskCtx.restore(); + var canvas, tmpCanvas, i, ii; + if (WebGLUtils.isEnabled) { + canvas = WebGLUtils.drawFigures(width, height, backgroundColor, + figures, context); - ctx.save(); - ctx.transform.apply(ctx, image.transform); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); - } - }, + // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 + tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false); + tmpCanvas.context.drawImage(canvas, 0, 0); + canvas = tmpCanvas.canvas; + } else { + tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false); + var tmpCtx = tmpCanvas.context; - paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; + var data = tmpCtx.createImageData(width, height); + if (backgroundColor) { + var bytes = data.data; + for (i = 0, ii = bytes.length; i < ii; i += 4) { + bytes[i] = backgroundColor[0]; + bytes[i + 1] = backgroundColor[1]; + bytes[i + 2] = backgroundColor[2]; + bytes[i + 3] = 255; + } + } + for (i = 0; i < figures.length; i++) { + drawFigure(data, figures[i], context); } + tmpCtx.putImageData(data, 0, 0); + canvas = tmpCanvas.canvas; + } - this.paintInlineImageXObject(imgData); - }, + return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, + scaleX: scaleX, scaleY: scaleY}; + } + return createMeshCanvas; +})(); - paintImageXObjectRepeat: - function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, - positions) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; - } +ShadingIRs.Mesh = { + fromIR: function Mesh_fromIR(raw) { + //var type = raw[1]; + var coords = raw[2]; + var colors = raw[3]; + var figures = raw[4]; + var bounds = raw[5]; + var matrix = raw[6]; + //var bbox = raw[7]; + var background = raw[8]; + return { + type: 'Pattern', + getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { + var combinedScale; + // Obtain scale from matrix and current transformation matrix. + if (shadingFill) { + combinedScale = Util.singularValueDecompose2dScale( + ctx.mozCurrentTransform); + } else { + var matrixScale = Util.singularValueDecompose2dScale(matrix); + var curMatrixScale = Util.singularValueDecompose2dScale( + owner.baseTransform); + combinedScale = [matrixScale[0] * curMatrixScale[0], + matrixScale[1] * curMatrixScale[1]]; + } - var width = imgData.width; - var height = imgData.height; - var map = []; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - map.push({transform: [scaleX, 0, 0, scaleY, positions[i], - positions[i + 1]], x: 0, y: 0, w: width, h: height}); - } - this.paintInlineImageXObjectGroup(imgData, map); - }, - paintInlineImageXObject: - function CanvasGraphics_paintInlineImageXObject(imgData) { - var width = imgData.width; - var height = imgData.height; - var ctx = this.ctx; + // Rasterizing on the main thread since sending/queue large canvases + // might cause OOM. + var temporaryPatternCanvas = createMeshCanvas(bounds, combinedScale, + coords, colors, figures, shadingFill ? null : background); - this.save(); - // scale the image to the unit square - ctx.scale(1 / width, -1 / height); + if (!shadingFill) { + ctx.setTransform.apply(ctx, owner.baseTransform); + if (matrix) { + ctx.transform.apply(ctx, matrix); + } + } - var currentTransform = ctx.mozCurrentTransformInverse; - var a = currentTransform[0], b = currentTransform[1]; - var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); - var c = currentTransform[2], d = currentTransform[3]; - var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); + ctx.translate(temporaryPatternCanvas.offsetX, + temporaryPatternCanvas.offsetY); + ctx.scale(temporaryPatternCanvas.scaleX, + temporaryPatternCanvas.scaleY); - var imgToPaint, tmpCanvas; - // instanceof HTMLElement does not work in jsdom node.js module - if (imgData instanceof HTMLElement || !imgData.data) { - imgToPaint = imgData; - } else { - tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); - imgToPaint = tmpCanvas.canvas; + return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); } + }; + } +}; - var paintWidth = width, paintHeight = height; - var tmpCanvasId = 'prescale1'; - // Vertial or horizontal scaling shall not be more than 2 to not loose the - // pixels during drawImage operation, painting on the temporary canvas(es) - // that are twice smaller in size - while ((widthScale > 2 && paintWidth > 1) || - (heightScale > 2 && paintHeight > 1)) { - var newWidth = paintWidth, newHeight = paintHeight; - if (widthScale > 2 && paintWidth > 1) { - newWidth = Math.ceil(paintWidth / 2); - widthScale /= paintWidth / newWidth; - } - if (heightScale > 2 && paintHeight > 1) { - newHeight = Math.ceil(paintHeight / 2); - heightScale /= paintHeight / newHeight; - } - tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight); - tmpCtx = tmpCanvas.context; - tmpCtx.clearRect(0, 0, newWidth, newHeight); - tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, 0, newWidth, newHeight); - imgToPaint = tmpCanvas.canvas; - paintWidth = newWidth; - paintHeight = newHeight; - tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; +ShadingIRs.Dummy = { + fromIR: function Dummy_fromIR() { + return { + type: 'Pattern', + getPattern: function Dummy_fromIR_getPattern() { + return 'hotpink'; } - ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, -height, width, height); + }; + } +}; - if (this.imageLayer) { - var position = this.getCanvasPosition(0, -height); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: width / currentTransform[0], - height: height / currentTransform[3] - }); - } - this.restore(); - }, +function getShadingPatternFromIR(raw) { + var shadingIR = ShadingIRs[raw[0]]; + if (!shadingIR) { + error('Unknown IR type: ' + raw[0]); + } + return shadingIR.fromIR(raw); +} - paintInlineImageXObjectGroup: - function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { - var ctx = this.ctx; - var w = imgData.width; - var h = imgData.height; +var TilingPattern = (function TilingPatternClosure() { + var PaintType = { + COLORED: 1, + UNCOLORED: 2 + }; - var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - for (var i = 0, ii = map.length; i < ii; i++) { - var entry = map[i]; - ctx.save(); - ctx.transform.apply(ctx, entry.transform); - ctx.scale(1, -1); - ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, - 0, -1, 1, 1); - if (this.imageLayer) { - var position = this.getCanvasPosition(entry.x, entry.y); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: w, - height: h - }); - } - ctx.restore(); - } - }, + function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) { + this.operatorList = IR[2]; + this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; + this.bbox = IR[4]; + this.xstep = IR[5]; + this.ystep = IR[6]; + this.paintType = IR[7]; + this.tilingType = IR[8]; + this.color = color; + this.objs = objs; + this.commonObjs = commonObjs; + this.baseTransform = baseTransform; + this.type = 'Pattern'; + this.ctx = ctx; + } - paintSolidColorImageMask: - function CanvasGraphics_paintSolidColorImageMask() { - this.ctx.fillRect(0, 0, 1, 1); - }, + TilingPattern.prototype = { + createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { + var operatorList = this.operatorList; + var bbox = this.bbox; + var xstep = this.xstep; + var ystep = this.ystep; + var paintType = this.paintType; + var tilingType = this.tilingType; + var color = this.color; + var objs = this.objs; + var commonObjs = this.commonObjs; - // Marked content + info('TilingType: ' + tilingType); - markPoint: function CanvasGraphics_markPoint(tag) { - // TODO Marked content. - }, - markPointProps: function CanvasGraphics_markPointProps(tag, properties) { - // TODO Marked content. - }, - beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { - // TODO Marked content. - }, - beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( - tag, properties) { - // TODO Marked content. - }, - endMarkedContent: function CanvasGraphics_endMarkedContent() { - // TODO Marked content. - }, + var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; - // Compatibility + var topLeft = [x0, y0]; + // we want the canvas to be as large as the step size + var botRight = [x0 + xstep, y0 + ystep]; - beginCompat: function CanvasGraphics_beginCompat() { - // TODO ignore undefined operators (should we do that anyway?) - }, - endCompat: function CanvasGraphics_endCompat() { - // TODO stop ignoring undefined operators - }, + var width = botRight[0] - topLeft[0]; + var height = botRight[1] - topLeft[1]; - // Helper functions - - consumePath: function CanvasGraphics_consumePath() { - var ctx = this.ctx; - if (this.pendingClip) { - if (this.pendingClip === EO_CLIP) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.clip(); - ctx.mozFillRule = 'nonzero'; - } else { - try { - ctx.clip('evenodd'); - } catch (ex) { - // shouldn't really happen, but browsers might think differently - ctx.clip(); - } - } - } else { - ctx.clip(); - } - this.pendingClip = null; - } - ctx.beginPath(); - }, - getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { - var inverse = this.ctx.mozCurrentTransformInverse; - // max of the current horizontal and vertical scale - return Math.sqrt(Math.max( - (inverse[0] * inverse[0] + inverse[1] * inverse[1]), - (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); - }, - getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { - var transform = this.ctx.mozCurrentTransform; - return [ - transform[0] * x + transform[2] * y + transform[4], - transform[1] * x + transform[3] * y + transform[5] - ]; - } - }; + // Obtain scale from matrix and current transformation matrix. + var matrixScale = Util.singularValueDecompose2dScale(this.matrix); + var curMatrixScale = Util.singularValueDecompose2dScale( + this.baseTransform); + var combinedScale = [matrixScale[0] * curMatrixScale[0], + matrixScale[1] * curMatrixScale[1]]; - for (var op in OPS) { - CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; - } + // MAX_PATTERN_SIZE is used to avoid OOM situation. + // Use width and height values that are as close as possible to the end + // result when the pattern is used. Too low value makes the pattern look + // blurry. Too large value makes it look too crispy. + width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), + MAX_PATTERN_SIZE); - return CanvasGraphics; -})(); + height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), + MAX_PATTERN_SIZE); + var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true); + var tmpCtx = tmpCanvas.context; + var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs); + graphics.groupLevel = owner.groupLevel; + this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); -var WebGLUtils = (function WebGLUtilsClosure() { - function loadShader(gl, code, shaderType) { - var shader = gl.createShader(shaderType); - gl.shaderSource(shader, code); - gl.compileShader(shader); - var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); - if (!compiled) { - var errorMsg = gl.getShaderInfoLog(shader); - throw new Error('Error during shader compilation: ' + errorMsg); - } - return shader; - } - function createVertexShader(gl, code) { - return loadShader(gl, code, gl.VERTEX_SHADER); - } - function createFragmentShader(gl, code) { - return loadShader(gl, code, gl.FRAGMENT_SHADER); - } - function createProgram(gl, shaders) { - var program = gl.createProgram(); - for (var i = 0, ii = shaders.length; i < ii; ++i) { - gl.attachShader(program, shaders[i]); - } - gl.linkProgram(program); - var linked = gl.getProgramParameter(program, gl.LINK_STATUS); - if (!linked) { - var errorMsg = gl.getProgramInfoLog(program); - throw new Error('Error during program linking: ' + errorMsg); - } - return program; - } - function createTexture(gl, image, textureId) { - gl.activeTexture(textureId); - var texture = gl.createTexture(); - gl.bindTexture(gl.TEXTURE_2D, texture); + this.setScale(width, height, xstep, ystep); + this.transformToScale(graphics); - // Set the parameters so we can render any size image. - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); + // transform coordinates to pattern space + var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; + graphics.transform.apply(graphics, tmpTranslate); - // Upload the image into the texture. - gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); - return texture; - } + this.clipBbox(graphics, bbox, x0, y0, x1, y1); - var currentGL, currentCanvas; - function generageGL() { - if (currentGL) { - return; - } - currentCanvas = document.createElement('canvas'); - currentGL = currentCanvas.getContext('webgl', - { premultipliedalpha: false }); - } + graphics.executeOperatorList(operatorList); + return tmpCanvas.canvas; + }, - var smaskVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec2 a_texCoord; \ - \ - uniform vec2 u_resolution; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_texCoord = a_texCoord; \ - } '; + setScale: function TilingPattern_setScale(width, height, xstep, ystep) { + this.scale = [width / xstep, height / ystep]; + }, - var smaskFragmentShaderCode = '\ - precision mediump float; \ - \ - uniform vec4 u_backdrop; \ - uniform int u_subtype; \ - uniform sampler2D u_image; \ - uniform sampler2D u_mask; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec4 imageColor = texture2D(u_image, v_texCoord); \ - vec4 maskColor = texture2D(u_mask, v_texCoord); \ - if (u_backdrop.a > 0.0) { \ - maskColor.rgb = maskColor.rgb * maskColor.a + \ - u_backdrop.rgb * (1.0 - maskColor.a); \ - } \ - float lum; \ - if (u_subtype == 0) { \ - lum = maskColor.a; \ - } else { \ - lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ - maskColor.b * 0.11; \ - } \ - imageColor.a *= lum; \ - imageColor.rgb *= imageColor.a; \ - gl_FragColor = imageColor; \ - } '; + transformToScale: function TilingPattern_transformToScale(graphics) { + var scale = this.scale; + var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; + graphics.transform.apply(graphics, tmpScale); + }, - var smaskCache = null; + scaleToContext: function TilingPattern_scaleToContext() { + var scale = this.scale; + this.ctx.scale(1 / scale[0], 1 / scale[1]); + }, - function initSmaskGL() { - var canvas, gl; + clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { + if (bbox && isArray(bbox) && 4 == bbox.length) { + var bboxWidth = x1 - x0; + var bboxHeight = y1 - y0; + graphics.rectangle(x0, y0, bboxWidth, bboxHeight); + graphics.clip(); + graphics.endPath(); + } + }, - generageGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; + setFillAndStrokeStyleToContext: + function setFillAndStrokeStyleToContext(context, paintType, color) { + switch (paintType) { + case PaintType.COLORED: + var ctx = this.ctx; + context.fillStyle = ctx.fillStyle; + context.strokeStyle = ctx.strokeStyle; + break; + case PaintType.UNCOLORED: + var cssColor = Util.makeCssRgb(color); + context.fillStyle = cssColor; + context.strokeStyle = cssColor; + break; + default: + error('Unsupported paint type: ' + paintType); + } + }, - // setup a GLSL program - var vertexShader = createVertexShader(gl, smaskVertexShaderCode); - var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); + getPattern: function TilingPattern_getPattern(ctx, owner) { + var temporaryPatternCanvas = this.createPatternCanvas(owner); - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); - cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); + ctx = this.ctx; + ctx.setTransform.apply(ctx, this.baseTransform); + ctx.transform.apply(ctx, this.matrix); + this.scaleToContext(); - var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); - var texLayerLocation = gl.getUniformLocation(program, 'u_image'); - var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); + return ctx.createPattern(temporaryPatternCanvas, 'repeat'); + } + }; - // provide texture coordinates for the rectangle. - var texCoordBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0.0, 0.0, - 1.0, 0.0, - 0.0, 1.0, - 0.0, 1.0, - 1.0, 0.0, - 1.0, 1.0]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(texCoordLocation); - gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); + return TilingPattern; +})(); - gl.uniform1i(texLayerLocation, 0); - gl.uniform1i(texMaskLocation, 1); - smaskCache = cache; - } +PDFJS.disableFontFace = false; - function composeSMask(layer, mask, properties) { - var width = layer.width, height = layer.height; - - if (!smaskCache) { - initSmaskGL(); +var FontLoader = { + insertRule: function fontLoaderInsertRule(rule) { + var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG'); + if (!styleElement) { + styleElement = document.createElement('style'); + styleElement.id = 'PDFJS_FONT_STYLE_TAG'; + document.documentElement.getElementsByTagName('head')[0].appendChild( + styleElement); } - var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); - if (properties.backdrop) { - gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], - properties.backdrop[1], properties.backdrop[2], 1); - } else { - gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); + var styleSheet = styleElement.sheet; + styleSheet.insertRule(rule, styleSheet.cssRules.length); + }, + + clear: function fontLoaderClear() { + var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG'); + if (styleElement) { + styleElement.parentNode.removeChild(styleElement); } - gl.uniform1i(cache.subtypeLocation, - properties.subtype === 'Luminosity' ? 1 : 0); + }, + get loadTestFont() { + // This is a CFF font with 1 glyph for '.' that fills its entire width and + // height. + return shadow(this, 'loadTestFont', atob( + 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' + + 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' + + 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' + + 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' + + 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' + + 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' + + 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' + + 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' + + 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' + + 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' + + 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' + + 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' + + 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' + + 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' + + 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' + + 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' + + 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' + + 'ABAAAAAAAAAAAD6AAAAAAAAA==' + )); + }, - // Create a textures - var texture = createTexture(gl, layer, gl.TEXTURE0); - var maskTexture = createTexture(gl, mask, gl.TEXTURE1); + loadTestFontId: 0, + loadingContext: { + requests: [], + nextRequestId: 0 + }, - // Create a buffer and put a single clipspace rectangle in - // it (2 triangles) - var buffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, buffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0, 0, - width, 0, - 0, height, - 0, height, - width, 0, - width, height]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); + isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() { + if (isWorker) { + return false; + } - // draw - gl.clearColor(0, 0, 0, 0); - gl.enable(gl.BLEND); - gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); - gl.clear(gl.COLOR_BUFFER_BIT); + // User agent string sniffing is bad, but there is no reliable way to tell + // if font is fully loaded and ready to be used with canvas. + var userAgent = window.navigator.userAgent; + var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent); + if (m && m[1] >= 14) { + return true; + } + // TODO other browsers + return false; + })(), - gl.drawArrays(gl.TRIANGLES, 0, 6); + bind: function fontLoaderBind(fonts, callback) { + assert(!isWorker, 'bind() shall be called from main thread'); - gl.flush(); + var rules = [], fontsToLoad = []; + for (var i = 0, ii = fonts.length; i < ii; i++) { + var font = fonts[i]; - gl.deleteTexture(texture); - gl.deleteTexture(maskTexture); - gl.deleteBuffer(buffer); + // Add the font to the DOM only once or skip if the font + // is already loaded. + if (font.attached || font.loading === false) { + continue; + } + font.attached = true; - return canvas; - } + var rule = font.bindDOM(); + if (rule) { + rules.push(rule); + fontsToLoad.push(font); + } + } - var figuresVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec3 a_color; \ - \ - uniform vec2 u_resolution; \ - uniform vec2 u_scale; \ - uniform vec2 u_offset; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - vec2 position = (a_position + u_offset) * u_scale; \ - vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_color = vec4(a_color / 255.0, 1.0); \ - } '; + var request = FontLoader.queueLoadingCallback(callback); + if (rules.length > 0 && !this.isSyncFontLoadingSupported) { + FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request); + } else { + request.complete(); + } + }, - var figuresFragmentShaderCode = '\ - precision mediump float; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - gl_FragColor = v_color; \ - } '; + queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) { + function LoadLoader_completeRequest() { + assert(!request.end, 'completeRequest() cannot be called twice'); + request.end = Date.now(); - var figuresCache = null; + // sending all completed requests in order how they were queued + while (context.requests.length > 0 && context.requests[0].end) { + var otherRequest = context.requests.shift(); + setTimeout(otherRequest.callback, 0); + } + } - function initFiguresGL() { - var canvas, gl; + var context = FontLoader.loadingContext; + var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++); + var request = { + id: requestId, + complete: LoadLoader_completeRequest, + callback: callback, + started: Date.now() + }; + context.requests.push(request); + return request; + }, - generageGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; + prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules, + fonts, + request) { + /** Hack begin */ + // There's currently no event when a font has finished downloading so the + // following code is a dirty hack to 'guess' when a font is + // ready. It's assumed fonts are loaded in order, so add a known test + // font after the desired fonts and then test for the loading of that + // test font. - // setup a GLSL program - var vertexShader = createVertexShader(gl, figuresVertexShaderCode); - var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); + function int32(data, offset) { + return (data.charCodeAt(offset) << 24) | + (data.charCodeAt(offset + 1) << 16) | + (data.charCodeAt(offset + 2) << 8) | + (data.charCodeAt(offset + 3) & 0xff); + } - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); - cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.colorLocation = gl.getAttribLocation(program, 'a_color'); + function spliceString(s, offset, remove, insert) { + var chunk1 = s.substr(0, offset); + var chunk2 = s.substr(offset + remove); + return chunk1 + insert + chunk2; + } - figuresCache = cache; - } + var i, ii; - function drawFigures(width, height, backgroundColor, figures, context) { - if (!figuresCache) { - initFiguresGL(); - } - var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; + var canvas = document.createElement('canvas'); + canvas.width = 1; + canvas.height = 1; + var ctx = canvas.getContext('2d'); - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); + var called = 0; + function isFontReady(name, callback) { + called++; + // With setTimeout clamping this gives the font ~100ms to load. + if(called > 30) { + warn('Load test font never loaded.'); + callback(); + return; + } + ctx.font = '30px ' + name; + ctx.fillText('.', 0, 20); + var imageData = ctx.getImageData(0, 0, 1, 1); + if (imageData.data[3] > 0) { + callback(); + return; + } + setTimeout(isFontReady.bind(null, name, callback)); + } - // count triangle points - var count = 0; - var i, ii, rows; - for (i = 0, ii = figures.length; i < ii; i++) { - switch (figures[i].type) { - case 'lattice': - rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; - count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; - break; - case 'triangles': - count += figures[i].coords.length; - break; + var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++; + // Chromium seems to cache fonts based on a hash of the actual font data, + // so the font must be modified for each load test else it will appear to + // be loaded already. + // TODO: This could maybe be made faster by avoiding the btoa of the full + // font by splitting it in chunks before hand and padding the font id. + var data = this.loadTestFont; + var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum) + data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, + loadTestFontId); + // CFF checksum is important for IE, adjusting it + var CFF_CHECKSUM_OFFSET = 16; + var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X' + var checksum = int32(data, CFF_CHECKSUM_OFFSET); + for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) { + checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0; } - } - // transfer data - var coords = new Float32Array(count * 2); - var colors = new Uint8Array(count * 3); - var coordsMap = context.coords, colorsMap = context.colors; - var pIndex = 0, cIndex = 0; - for (i = 0, ii = figures.length; i < ii; i++) { - var figure = figures[i], ps = figure.coords, cs = figure.colors; - switch (figure.type) { - case 'lattice': - var cols = figure.verticesPerRow; - rows = (ps.length / cols) | 0; - for (var row = 1; row < rows; row++) { - var offset = row * cols + 1; - for (var col = 1; col < cols; col++, offset++) { - coords[pIndex] = coordsMap[ps[offset - cols - 1]]; - coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; - coords[pIndex + 2] = coordsMap[ps[offset - cols]]; - coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; - coords[pIndex + 4] = coordsMap[ps[offset - 1]]; - coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; - colors[cIndex] = colorsMap[cs[offset - cols - 1]]; - colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; - colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; - colors[cIndex + 3] = colorsMap[cs[offset - cols]]; - colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; - colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; - colors[cIndex + 6] = colorsMap[cs[offset - 1]]; - colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; - colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; - - coords[pIndex + 6] = coords[pIndex + 2]; - coords[pIndex + 7] = coords[pIndex + 3]; - coords[pIndex + 8] = coords[pIndex + 4]; - coords[pIndex + 9] = coords[pIndex + 5]; - coords[pIndex + 10] = coordsMap[ps[offset]]; - coords[pIndex + 11] = coordsMap[ps[offset] + 1]; - colors[cIndex + 9] = colors[cIndex + 3]; - colors[cIndex + 10] = colors[cIndex + 4]; - colors[cIndex + 11] = colors[cIndex + 5]; - colors[cIndex + 12] = colors[cIndex + 6]; - colors[cIndex + 13] = colors[cIndex + 7]; - colors[cIndex + 14] = colors[cIndex + 8]; - colors[cIndex + 15] = colorsMap[cs[offset]]; - colors[cIndex + 16] = colorsMap[cs[offset] + 1]; - colors[cIndex + 17] = colorsMap[cs[offset] + 2]; - pIndex += 12; - cIndex += 18; - } - } - break; - case 'triangles': - for (var j = 0, jj = ps.length; j < jj; j++) { - coords[pIndex] = coordsMap[ps[j]]; - coords[pIndex + 1] = coordsMap[ps[j] + 1]; - colors[cIndex] = colorsMap[cs[i]]; - colors[cIndex + 1] = colorsMap[cs[j] + 1]; - colors[cIndex + 2] = colorsMap[cs[j] + 2]; - pIndex += 2; - cIndex += 3; - } - break; + if (i < loadTestFontId.length) { // align to 4 bytes boundary + checksum = (checksum - XXXX_VALUE + + int32(loadTestFontId + 'XXX', i)) | 0; } - } - - // draw - if (backgroundColor) { - gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, - backgroundColor[2] / 255, 1.0); - } else { - gl.clearColor(0, 0, 0, 0); - } - gl.clear(gl.COLOR_BUFFER_BIT); + data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum)); - var coordsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); + var url = 'url(data:font/opentype;base64,' + btoa(data) + ');'; + var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' + + url + '}'; + FontLoader.insertRule(rule); - var colorsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.colorLocation); - gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, - 0, 0); + var names = []; + for (i = 0, ii = fonts.length; i < ii; i++) { + names.push(fonts[i].loadedName); + } + names.push(loadTestFontId); - gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); - gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); + var div = document.createElement('div'); + div.setAttribute('style', + 'visibility: hidden;' + + 'width: 10px; height: 10px;' + + 'position: absolute; top: 0px; left: 0px;'); + for (i = 0, ii = names.length; i < ii; ++i) { + var span = document.createElement('span'); + span.textContent = 'Hi'; + span.style.fontFamily = names[i]; + div.appendChild(span); + } + document.body.appendChild(div); - gl.drawArrays(gl.TRIANGLES, 0, count); + isFontReady(loadTestFontId, function() { + document.body.removeChild(div); + request.complete(); + }); + /** Hack end */ + } +}; - gl.flush(); +var FontFace = (function FontFaceClosure() { + function FontFace(name, file, properties) { + this.compiledGlyphs = {}; + if (arguments.length === 1) { + // importing translated data + var data = arguments[0]; + for (var i in data) { + this[i] = data[i]; + } + return; + } + } + FontFace.prototype = { + bindDOM: function FontFace_bindDOM() { + if (!this.data) { + return null; + } - gl.deleteBuffer(coordsBuffer); - gl.deleteBuffer(colorsBuffer); + if (PDFJS.disableFontFace) { + this.disableFontFace = true; + return null; + } - return canvas; - } + var data = bytesToString(new Uint8Array(this.data)); + var fontName = this.loadedName; - function cleanup() { - smaskCache = null; - figuresCache = null; - } + // Add the font-face rule to the document + var url = ('url(data:' + this.mimetype + ';base64,' + + window.btoa(data) + ');'); + var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}'; + FontLoader.insertRule(rule); - return { - get isEnabled() { - if (PDFJS.disableWebGL) { - return false; + if (PDFJS.pdfBug && 'FontInspector' in globalScope && + globalScope['FontInspector'].enabled) { + globalScope['FontInspector'].fontAdded(this, url); } - var enabled = false; - try { - generageGL(); - enabled = !!currentGL; - } catch (e) { } - return shadow(this, 'isEnabled', enabled); + + return rule; }, - composeSMask: composeSMask, - drawFigures: drawFigures, - clear: cleanup + + getPathGenerator: function (objs, character) { + if (!(character in this.compiledGlyphs)) { + var js = objs.get(this.loadedName + '_path_' + character); + /*jshint -W054 */ + this.compiledGlyphs[character] = new Function('c', 'size', js); + } + return this.compiledGlyphs[character]; + } }; + return FontFace; })(); -var ShadingIRs = {}; +var HIGHLIGHT_OFFSET = 4; // px +var ANNOT_MIN_SIZE = 10; // px -ShadingIRs.RadialAxial = { - fromIR: function RadialAxial_fromIR(raw) { - var type = raw[1]; - var colorStops = raw[2]; - var p0 = raw[3]; - var p1 = raw[4]; - var r0 = raw[5]; - var r1 = raw[6]; - return { - type: 'Pattern', - getPattern: function RadialAxial_getPattern(ctx) { - var grad; - if (type === 'axial') { - grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); - } else if (type === 'radial') { - grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); - } +var AnnotationUtils = (function AnnotationUtilsClosure() { + // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont() + function setTextStyles(element, item, fontObj) { - for (var i = 0, ii = colorStops.length; i < ii; ++i) { - var c = colorStops[i]; - grad.addColorStop(c[0], c[1]); - } - return grad; - } - }; - } -}; + var style = element.style; + style.fontSize = item.fontSize + 'px'; + style.direction = item.fontDirection < 0 ? 'rtl': 'ltr'; -var createMeshCanvas = (function createMeshCanvasClosure() { - function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { - // Very basic Gouraud-shaded triangle rasterization algorithm. - var coords = context.coords, colors = context.colors; - var bytes = data.data, rowSize = data.width * 4; - var tmp; - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - if (coords[p2 + 1] > coords[p3 + 1]) { - tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; + if (!fontObj) { + return; } - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - var x1 = (coords[p1] + context.offsetX) * context.scaleX; - var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; - var x2 = (coords[p2] + context.offsetX) * context.scaleX; - var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; - var x3 = (coords[p3] + context.offsetX) * context.scaleX; - var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; - if (y1 >= y3) { - return; - } - var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; - var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; - var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; - var minY = Math.round(y1), maxY = Math.round(y3); - var xa, car, cag, cab; - var xb, cbr, cbg, cbb; - var k; - for (var y = minY; y <= maxY; y++) { - if (y < y2) { - k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); - xa = x1 - (x1 - x2) * k; - car = c1r - (c1r - c2r) * k; - cag = c1g - (c1g - c2g) * k; - cab = c1b - (c1b - c2b) * k; - } else { - k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); - xa = x2 - (x2 - x3) * k; - car = c2r - (c2r - c3r) * k; - cag = c2g - (c2g - c3g) * k; - cab = c2b - (c2b - c3b) * k; - } - k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); - xb = x1 - (x1 - x3) * k; - cbr = c1r - (c1r - c3r) * k; - cbg = c1g - (c1g - c3g) * k; - cbb = c1b - (c1b - c3b) * k; - var x1_ = Math.round(Math.min(xa, xb)); - var x2_ = Math.round(Math.max(xa, xb)); - var j = rowSize * y + x1_ * 4; - for (var x = x1_; x <= x2_; x++) { - k = (xa - x) / (xa - xb); - k = k < 0 ? 0 : k > 1 ? 1 : k; - bytes[j++] = (car - (car - cbr) * k) | 0; - bytes[j++] = (cag - (cag - cbg) * k) | 0; - bytes[j++] = (cab - (cab - cbb) * k) | 0; - bytes[j++] = 255; - } - } + style.fontWeight = fontObj.black ? + (fontObj.bold ? 'bolder' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); + style.fontStyle = fontObj.italic ? 'italic' : 'normal'; + + var fontName = fontObj.loadedName; + var fontFamily = fontName ? '"' + fontName + '", ' : ''; + // Use a reasonable default font if the font doesn't specify a fallback + var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif'; + style.fontFamily = fontFamily + fallbackName; } - function drawFigure(data, figure, context) { - var ps = figure.coords; - var cs = figure.colors; - var i, ii; - switch (figure.type) { - case 'lattice': - var verticesPerRow = figure.verticesPerRow; - var rows = Math.floor(ps.length / verticesPerRow) - 1; - var cols = verticesPerRow - 1; - for (i = 0; i < rows; i++) { - var q = i * verticesPerRow; - for (var j = 0; j < cols; j++, q++) { - drawTriangle(data, context, - ps[q], ps[q + 1], ps[q + verticesPerRow], - cs[q], cs[q + 1], cs[q + verticesPerRow]); - drawTriangle(data, context, - ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], - cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); - } - } - break; - case 'triangles': - for (i = 0, ii = ps.length; i < ii; i += 3) { - drawTriangle(data, context, - ps[i], ps[i + 1], ps[i + 2], - cs[i], cs[i + 1], cs[i + 2]); - } - break; - default: - error('illigal figure'); - break; + // TODO(mack): Remove this, it's not really that helpful. + function getEmptyContainer(tagName, rect, borderWidth) { + var bWidth = borderWidth || 0; + var element = document.createElement(tagName); + element.style.borderWidth = bWidth + 'px'; + var width = rect[2] - rect[0] - 2 * bWidth; + var height = rect[3] - rect[1] - 2 * bWidth; + element.style.width = width + 'px'; + element.style.height = height + 'px'; + return element; + } + + function initContainer(item) { + var container = getEmptyContainer('section', item.rect, item.borderWidth); + container.style.backgroundColor = item.color; + + var color = item.color; + var rgb = []; + for (var i = 0; i < 3; ++i) { + rgb[i] = Math.round(color[i] * 255); } + item.colorCssRgb = Util.makeCssRgb(rgb); + + var highlight = document.createElement('div'); + highlight.className = 'annotationHighlight'; + highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px'; + highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px'; + highlight.setAttribute('hidden', true); + + item.highlightElement = highlight; + container.appendChild(item.highlightElement); + + return container; } - function createMeshCanvas(bounds, combinesScale, coords, colors, figures, - backgroundColor) { - // we will increase scale on some weird factor to let antialiasing take - // care of "rough" edges - var EXPECTED_SCALE = 1.1; - // MAX_PATTERN_SIZE is used to avoid OOM situation. - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough + function getHtmlElementForTextWidgetAnnotation(item, commonObjs) { + var element = getEmptyContainer('div', item.rect, 0); + element.style.display = 'table'; - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var boundsWidth = Math.ceil(bounds[2]) - offsetX; - var boundsHeight = Math.ceil(bounds[3]) - offsetY; + var content = document.createElement('div'); + content.textContent = item.fieldValue; + var textAlignment = item.textAlignment; + content.style.textAlign = ['left', 'center', 'right'][textAlignment]; + content.style.verticalAlign = 'middle'; + content.style.display = 'table-cell'; - var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var scaleX = boundsWidth / width; - var scaleY = boundsHeight / height; + var fontObj = item.fontRefName ? + commonObjs.getData(item.fontRefName) : null; + setTextStyles(content, item, fontObj); - var context = { - coords: coords, - colors: colors, - offsetX: -offsetX, - offsetY: -offsetY, - scaleX: 1 / scaleX, - scaleY: 1 / scaleY - }; + element.appendChild(content); - var canvas, tmpCanvas, i, ii; - if (WebGLUtils.isEnabled) { - canvas = WebGLUtils.drawFigures(width, height, backgroundColor, - figures, context); + return element; + } - // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 - tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false); - tmpCanvas.context.drawImage(canvas, 0, 0); - canvas = tmpCanvas.canvas; - } else { - tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false); - var tmpCtx = tmpCanvas.context; + function getHtmlElementForTextAnnotation(item, commonObjs) { + var rect = item.rect; - var data = tmpCtx.createImageData(width, height); - if (backgroundColor) { - var bytes = data.data; - for (i = 0, ii = bytes.length; i < ii; i += 4) { - bytes[i] = backgroundColor[0]; - bytes[i + 1] = backgroundColor[1]; - bytes[i + 2] = backgroundColor[2]; - bytes[i + 3] = 255; - } - } - for (i = 0; i < figures.length; i++) { - drawFigure(data, figures[i], context); + // sanity check because of OOo-generated PDFs + if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) { + rect[3] = rect[1] + ANNOT_MIN_SIZE; + } + if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) { + rect[2] = rect[0] + (rect[3] - rect[1]); // make it square + } + + var container = initContainer(item); + container.className = 'annotText'; + + var image = document.createElement('img'); + image.style.height = container.style.height; + image.style.width = container.style.width; + var iconName = item.name; + image.src = PDFJS.imageResourcesPath + 'annotation-' + + iconName.toLowerCase() + '.svg'; + image.alt = '[{{type}} Annotation]'; + image.dataset.l10nId = 'text_annotation_type'; + image.dataset.l10nArgs = JSON.stringify({type: iconName}); + + var contentWrapper = document.createElement('div'); + contentWrapper.className = 'annotTextContentWrapper'; + contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px'; + contentWrapper.style.top = '-10px'; + + var content = document.createElement('div'); + content.className = 'annotTextContent'; + content.setAttribute('hidden', true); + + var i, ii; + if (item.hasBgColor) { + var color = item.color; + var rgb = []; + for (i = 0; i < 3; ++i) { + // Enlighten the color (70%) + var c = Math.round(color[i] * 255); + rgb[i] = Math.round((255 - c) * 0.7) + c; } - tmpCtx.putImageData(data, 0, 0); - canvas = tmpCanvas.canvas; + content.style.backgroundColor = Util.makeCssRgb(rgb); } - return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, - scaleX: scaleX, scaleY: scaleY}; - } - return createMeshCanvas; -})(); + var title = document.createElement('h1'); + var text = document.createElement('p'); + title.textContent = item.title; -ShadingIRs.Mesh = { - fromIR: function Mesh_fromIR(raw) { - //var type = raw[1]; - var coords = raw[2]; - var colors = raw[3]; - var figures = raw[4]; - var bounds = raw[5]; - var matrix = raw[6]; - //var bbox = raw[7]; - var background = raw[8]; - return { - type: 'Pattern', - getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { - var combinedScale; - // Obtain scale from matrix and current transformation matrix. - if (shadingFill) { - combinedScale = Util.singularValueDecompose2dScale( - ctx.mozCurrentTransform); - } else { - var matrixScale = Util.singularValueDecompose2dScale(matrix); - var curMatrixScale = Util.singularValueDecompose2dScale( - owner.baseTransform); - combinedScale = [matrixScale[0] * curMatrixScale[0], - matrixScale[1] * curMatrixScale[1]]; + if (!item.content && !item.title) { + content.setAttribute('hidden', true); + } else { + var e = document.createElement('span'); + var lines = item.content.split(/(?:\r\n?|\n)/); + for (i = 0, ii = lines.length; i < ii; ++i) { + var line = lines[i]; + e.appendChild(document.createTextNode(line)); + if (i < (ii - 1)) { + e.appendChild(document.createElement('br')); } + } + text.appendChild(e); + var pinned = false; - // Rasterizing on the main thread since sending/queue large canvases - // might cause OOM. - var temporaryPatternCanvas = createMeshCanvas(bounds, combinedScale, - coords, colors, figures, shadingFill ? null : background); + var showAnnotation = function showAnnotation(pin) { + if (pin) { + pinned = true; + } + if (content.hasAttribute('hidden')) { + container.style.zIndex += 1; + content.removeAttribute('hidden'); + } + }; - if (!shadingFill) { - ctx.setTransform.apply(ctx, owner.baseTransform); - if (matrix) { - ctx.transform.apply(ctx, matrix); - } + var hideAnnotation = function hideAnnotation(unpin) { + if (unpin) { + pinned = false; + } + if (!content.hasAttribute('hidden') && !pinned) { + container.style.zIndex -= 1; + content.setAttribute('hidden', true); } + }; - ctx.translate(temporaryPatternCanvas.offsetX, - temporaryPatternCanvas.offsetY); - ctx.scale(temporaryPatternCanvas.scaleX, - temporaryPatternCanvas.scaleY); + var toggleAnnotation = function toggleAnnotation() { + if (pinned) { + hideAnnotation(true); + } else { + showAnnotation(true); + } + }; - return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); - } - }; + image.addEventListener('click', function image_clickHandler() { + toggleAnnotation(); + }, false); + image.addEventListener('mouseover', function image_mouseOverHandler() { + showAnnotation(); + }, false); + image.addEventListener('mouseout', function image_mouseOutHandler() { + hideAnnotation(); + }, false); + + content.addEventListener('click', function content_clickHandler() { + hideAnnotation(true); + }, false); + } + + content.appendChild(title); + content.appendChild(text); + contentWrapper.appendChild(content); + container.appendChild(image); + container.appendChild(contentWrapper); + + return container; } -}; -ShadingIRs.Dummy = { - fromIR: function Dummy_fromIR() { - return { - type: 'Pattern', - getPattern: function Dummy_fromIR_getPattern() { - return 'hotpink'; - } - }; + function getHtmlElementForLinkAnnotation(item, commonObjs) { + + var container = initContainer(item); + container.className = 'annotLink'; + + container.style.borderColor = item.colorCssRgb; + container.style.borderStyle = 'solid'; + + var link = document.createElement('a'); + link.href = link.title = item.url || ''; + + container.appendChild(link); + + return container; } -}; -function getShadingPatternFromIR(raw) { - var shadingIR = ShadingIRs[raw[0]]; - if (!shadingIR) { - error('Unknown IR type: ' + raw[0]); + function getHtmlElement(data, objs) { + switch (data.annotationType) { + case AnnotationType.WIDGET: + return getHtmlElementForTextWidgetAnnotation(data, objs); + case AnnotationType.TEXT: + return getHtmlElementForTextAnnotation(data, objs); + case AnnotationType.LINK: + return getHtmlElementForLinkAnnotation(data, objs); + default: + throw new Error('Unsupported annotationType: ' + data.annotationType); + } } - return shadingIR.fromIR(raw); -} -var TilingPattern = (function TilingPatternClosure() { - var PaintType = { - COLORED: 1, - UNCOLORED: 2 + return { + getHtmlElement: getHtmlElement }; +})(); - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) { - this.operatorList = IR[2]; - this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; - this.bbox = IR[4]; - this.xstep = IR[5]; - this.ystep = IR[6]; - this.paintType = IR[7]; - this.tilingType = IR[8]; - this.color = color; - this.objs = objs; - this.commonObjs = commonObjs; - this.baseTransform = baseTransform; - this.type = 'Pattern'; - this.ctx = ctx; - } - - TilingPattern.prototype = { - createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { - var operatorList = this.operatorList; - var bbox = this.bbox; - var xstep = this.xstep; - var ystep = this.ystep; - var paintType = this.paintType; - var tilingType = this.tilingType; - var color = this.color; - var objs = this.objs; - var commonObjs = this.commonObjs; - info('TilingType: ' + tilingType); - var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; +var NetworkManager = (function NetworkManagerClosure() { - var topLeft = [x0, y0]; - // we want the canvas to be as large as the step size - var botRight = [x0 + xstep, y0 + ystep]; + var OK_RESPONSE = 200; + var PARTIAL_CONTENT_RESPONSE = 206; - var width = botRight[0] - topLeft[0]; - var height = botRight[1] - topLeft[1]; + function NetworkManager(url, args) { + this.url = url; + args = args || {}; + this.isHttp = /^https?:/i.test(url); + this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; + this.withCredentials = args.withCredentials || false; + this.getXhr = args.getXhr || + function NetworkManager_getXhr() { + return new XMLHttpRequest(); + }; - // Obtain scale from matrix and current transformation matrix. - var matrixScale = Util.singularValueDecompose2dScale(this.matrix); - var curMatrixScale = Util.singularValueDecompose2dScale( - this.baseTransform); - var combinedScale = [matrixScale[0] * curMatrixScale[0], - matrixScale[1] * curMatrixScale[1]]; + this.currXhrId = 0; + this.pendingRequests = {}; + this.loadedRequests = {}; + } - // MAX_PATTERN_SIZE is used to avoid OOM situation. - // Use width and height values that are as close as possible to the end - // result when the pattern is used. Too low value makes the pattern look - // blurry. Too large value makes it look too crispy. - width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), - MAX_PATTERN_SIZE); + function getArrayBuffer(xhr) { + var data = xhr.response; + if (typeof data !== 'string') { + return data; + } + var length = data.length; + var buffer = new Uint8Array(length); + for (var i = 0; i < length; i++) { + buffer[i] = data.charCodeAt(i) & 0xFF; + } + return buffer; + } - height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), - MAX_PATTERN_SIZE); + NetworkManager.prototype = { + requestRange: function NetworkManager_requestRange(begin, end, listeners) { + var args = { + begin: begin, + end: end + }; + for (var prop in listeners) { + args[prop] = listeners[prop]; + } + return this.request(args); + }, - var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true); - var tmpCtx = tmpCanvas.context; - var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs); - graphics.groupLevel = owner.groupLevel; + requestFull: function NetworkManager_requestRange(listeners) { + return this.request(listeners); + }, - this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); + request: function NetworkManager_requestRange(args) { + var xhr = this.getXhr(); + var xhrId = this.currXhrId++; + var pendingRequest = this.pendingRequests[xhrId] = { + xhr: xhr + }; - this.setScale(width, height, xstep, ystep); - this.transformToScale(graphics); + xhr.open('GET', this.url); + xhr.withCredentials = this.withCredentials; + for (var property in this.httpHeaders) { + var value = this.httpHeaders[property]; + if (typeof value === 'undefined') { + continue; + } + xhr.setRequestHeader(property, value); + } + if (this.isHttp && 'begin' in args && 'end' in args) { + var rangeStr = args.begin + '-' + (args.end - 1); + xhr.setRequestHeader('Range', 'bytes=' + rangeStr); + pendingRequest.expectedStatus = 206; + } else { + pendingRequest.expectedStatus = 200; + } - // transform coordinates to pattern space - var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; - graphics.transform.apply(graphics, tmpTranslate); + xhr.responseType = 'arraybuffer'; - this.clipBbox(graphics, bbox, x0, y0, x1, y1); + if (args.onProgress) { + xhr.onprogress = args.onProgress; + } + if (args.onError) { + xhr.onerror = function(evt) { + args.onError(xhr.status); + }; + } + xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); - graphics.executeOperatorList(operatorList); - return tmpCanvas.canvas; - }, + pendingRequest.onHeadersReceived = args.onHeadersReceived; + pendingRequest.onDone = args.onDone; + pendingRequest.onError = args.onError; - setScale: function TilingPattern_setScale(width, height, xstep, ystep) { - this.scale = [width / xstep, height / ystep]; - }, + xhr.send(null); - transformToScale: function TilingPattern_transformToScale(graphics) { - var scale = this.scale; - var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; - graphics.transform.apply(graphics, tmpScale); + return xhrId; }, - scaleToContext: function TilingPattern_scaleToContext() { - var scale = this.scale; - this.ctx.scale(1 / scale[0], 1 / scale[1]); - }, + onStateChange: function NetworkManager_onStateChange(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } - clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { - if (bbox && isArray(bbox) && 4 == bbox.length) { - var bboxWidth = x1 - x0; - var bboxHeight = y1 - y0; - graphics.rectangle(x0, y0, bboxWidth, bboxHeight); - graphics.clip(); - graphics.endPath(); + var xhr = pendingRequest.xhr; + if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { + pendingRequest.onHeadersReceived(); + delete pendingRequest.onHeadersReceived; } - }, - setFillAndStrokeStyleToContext: - function setFillAndStrokeStyleToContext(context, paintType, color) { - switch (paintType) { - case PaintType.COLORED: - var ctx = this.ctx; - context.fillStyle = ctx.fillStyle; - context.strokeStyle = ctx.strokeStyle; - break; - case PaintType.UNCOLORED: - var cssColor = Util.makeCssRgb(color); - context.fillStyle = cssColor; - context.strokeStyle = cssColor; - break; - default: - error('Unsupported paint type: ' + paintType); - } - }, + if (xhr.readyState !== 4) { + return; + } - getPattern: function TilingPattern_getPattern(ctx, owner) { - var temporaryPatternCanvas = this.createPatternCanvas(owner); + if (!(xhrId in this.pendingRequests)) { + // The XHR request might have been aborted in onHeadersReceived() + // callback, in which case we should abort request + return; + } - ctx = this.ctx; - ctx.setTransform.apply(ctx, this.baseTransform); - ctx.transform.apply(ctx, this.matrix); - this.scaleToContext(); + delete this.pendingRequests[xhrId]; - return ctx.createPattern(temporaryPatternCanvas, 'repeat'); - } - }; + // success status == 0 can be on ftp, file and other protocols + if (xhr.status === 0 && this.isHttp) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } + var xhrStatus = xhr.status || OK_RESPONSE; - return TilingPattern; -})(); + // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: + // "A server MAY ignore the Range header". This means it's possible to + // get a 200 rather than a 206 response from a range request. + var ok_response_on_range_request = + xhrStatus === OK_RESPONSE && + pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; + if (!ok_response_on_range_request && + xhrStatus !== pendingRequest.expectedStatus) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } -PDFJS.disableFontFace = false; + this.loadedRequests[xhrId] = true; -var FontLoader = { - insertRule: function fontLoaderInsertRule(rule) { - var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG'); - if (!styleElement) { - styleElement = document.createElement('style'); - styleElement.id = 'PDFJS_FONT_STYLE_TAG'; - document.documentElement.getElementsByTagName('head')[0].appendChild( - styleElement); - } + var chunk = getArrayBuffer(xhr); + if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { + var rangeHeader = xhr.getResponseHeader('Content-Range'); + var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); + var begin = parseInt(matches[1], 10); + pendingRequest.onDone({ + begin: begin, + chunk: chunk + }); + } else { + pendingRequest.onDone({ + begin: 0, + chunk: chunk + }); + } + }, - var styleSheet = styleElement.sheet; - styleSheet.insertRule(rule, styleSheet.cssRules.length); - }, + hasPendingRequests: function NetworkManager_hasPendingRequests() { + for (var xhrId in this.pendingRequests) { + return true; + } + return false; + }, - clear: function fontLoaderClear() { - var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG'); - if (styleElement) { - styleElement.parentNode.removeChild(styleElement); - } - }, - get loadTestFont() { - // This is a CFF font with 1 glyph for '.' that fills its entire width and - // height. - return shadow(this, 'loadTestFont', atob( - 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' + - 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' + - 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' + - 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' + - 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' + - 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' + - 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' + - 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' + - 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' + - 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' + - 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' + - 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' + - 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' + - 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' + - 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' + - 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' + - 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' + - 'ABAAAAAAAAAAAD6AAAAAAAAA==' - )); - }, + getRequestXhr: function NetworkManager_getXhr(xhrId) { + return this.pendingRequests[xhrId].xhr; + }, - loadTestFontId: 0, + isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { + return xhrId in this.pendingRequests; + }, - loadingContext: { - requests: [], - nextRequestId: 0 - }, + isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { + return xhrId in this.loadedRequests; + }, - isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() { - if (isWorker) { - return false; - } + abortAllRequests: function NetworkManager_abortAllRequests() { + for (var xhrId in this.pendingRequests) { + this.abortRequest(xhrId | 0); + } + }, - // User agent string sniffing is bad, but there is no reliable way to tell - // if font is fully loaded and ready to be used with canvas. - var userAgent = window.navigator.userAgent; - var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent); - if (m && m[1] >= 14) { - return true; + abortRequest: function NetworkManager_abortRequest(xhrId) { + var xhr = this.pendingRequests[xhrId].xhr; + delete this.pendingRequests[xhrId]; + xhr.abort(); } - // TODO other browsers - return false; - })(), + }; - bind: function fontLoaderBind(fonts, callback) { - assert(!isWorker, 'bind() shall be called from main thread'); + return NetworkManager; +})(); - var rules = [], fontsToLoad = []; - for (var i = 0, ii = fonts.length; i < ii; i++) { - var font = fonts[i]; - // Add the font to the DOM only once or skip if the font - // is already loaded. - if (font.attached || font.loading === false) { - continue; - } - font.attached = true; - var rule = font.bindDOM(); - if (rule) { - rules.push(rule); - fontsToLoad.push(font); +var ChunkedStream = (function ChunkedStreamClosure() { + function ChunkedStream(length, chunkSize, manager) { + this.bytes = new Uint8Array(length); + this.start = 0; + this.pos = 0; + this.end = length; + this.chunkSize = chunkSize; + this.loadedChunks = []; + this.numChunksLoaded = 0; + this.numChunks = Math.ceil(length / chunkSize); + this.manager = manager; + this.initialDataLength = 0; + this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache + } + + // required methods for a stream. if a particular stream does not + // implement these, an error should be thrown + ChunkedStream.prototype = { + + getMissingChunks: function ChunkedStream_getMissingChunks() { + var chunks = []; + for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { + if (!(chunk in this.loadedChunks)) { + chunks.push(chunk); + } } - } + return chunks; + }, - var request = FontLoader.queueLoadingCallback(callback); - if (rules.length > 0 && !this.isSyncFontLoadingSupported) { - FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request); - } else { - request.complete(); - } - }, + getBaseStreams: function ChunkedStream_getBaseStreams() { + return [this]; + }, - queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) { - function LoadLoader_completeRequest() { - assert(!request.end, 'completeRequest() cannot be called twice'); - request.end = Date.now(); + allChunksLoaded: function ChunkedStream_allChunksLoaded() { + return this.numChunksLoaded === this.numChunks; + }, - // sending all completed requests in order how they were queued - while (context.requests.length > 0 && context.requests[0].end) { - var otherRequest = context.requests.shift(); - setTimeout(otherRequest.callback, 0); + onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { + var end = begin + chunk.byteLength; + + assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); + // Using this.length is inaccurate here since this.start can be moved + // See ChunkedStream.moveStart() + var length = this.bytes.length; + assert(end % this.chunkSize === 0 || end === length, + 'Bad end offset: ' + end); + + this.bytes.set(new Uint8Array(chunk), begin); + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + var curChunk; + + for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { + if (!(curChunk in this.loadedChunks)) { + this.loadedChunks[curChunk] = true; + ++this.numChunksLoaded; + } } - } + }, - var context = FontLoader.loadingContext; - var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++); - var request = { - id: requestId, - complete: LoadLoader_completeRequest, - callback: callback, - started: Date.now() - }; - context.requests.push(request); - return request; - }, + onReceiveInitialData: function ChunkedStream_onReceiveInitialData(data) { + this.bytes.set(data); + this.initialDataLength = data.length; + var endChunk = (this.end === data.length ? + this.numChunks : Math.floor(data.length / this.chunkSize)); + for (var i = 0; i < endChunk; i++) { + this.loadedChunks[i] = true; + ++this.numChunksLoaded; + } + }, - prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules, - fonts, - request) { - /** Hack begin */ - // There's currently no event when a font has finished downloading so the - // following code is a dirty hack to 'guess' when a font is - // ready. It's assumed fonts are loaded in order, so add a known test - // font after the desired fonts and then test for the loading of that - // test font. + ensureByte: function ChunkedStream_ensureRange(pos) { + var chunk = Math.floor(pos / this.chunkSize); + if (chunk === this.lastSuccessfulEnsureByteChunk) { + return; + } - function int32(data, offset) { - return (data.charCodeAt(offset) << 24) | - (data.charCodeAt(offset + 1) << 16) | - (data.charCodeAt(offset + 2) << 8) | - (data.charCodeAt(offset + 3) & 0xff); + if (!(chunk in this.loadedChunks)) { + throw new MissingDataException(pos, pos + 1); } + this.lastSuccessfulEnsureByteChunk = chunk; + }, - function spliceString(s, offset, remove, insert) { - var chunk1 = s.substr(0, offset); - var chunk2 = s.substr(offset + remove); - return chunk1 + insert + chunk2; + ensureRange: function ChunkedStream_ensureRange(begin, end) { + if (begin >= end) { + return; } - var i, ii; + if (end <= this.initialDataLength) { + return; + } - var canvas = document.createElement('canvas'); - canvas.width = 1; - canvas.height = 1; - var ctx = canvas.getContext('2d'); + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + throw new MissingDataException(begin, end); + } + } + }, - var called = 0; - function isFontReady(name, callback) { - called++; - // With setTimeout clamping this gives the font ~100ms to load. - if(called > 30) { - warn('Load test font never loaded.'); - callback(); - return; + nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { + var chunk, n; + for (chunk = beginChunk, n = this.numChunks; chunk < n; ++chunk) { + if (!(chunk in this.loadedChunks)) { + return chunk; } - ctx.font = '30px ' + name; - ctx.fillText('.', 0, 20); - var imageData = ctx.getImageData(0, 0, 1, 1); - if (imageData.data[3] > 0) { - callback(); - return; + } + // Wrap around to beginning + for (chunk = 0; chunk < beginChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + return chunk; } - setTimeout(isFontReady.bind(null, name, callback)); } + return null; + }, - var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++; - // Chromium seems to cache fonts based on a hash of the actual font data, - // so the font must be modified for each load test else it will appear to - // be loaded already. - // TODO: This could maybe be made faster by avoiding the btoa of the full - // font by splitting it in chunks before hand and padding the font id. - var data = this.loadTestFont; - var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum) - data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, - loadTestFontId); - // CFF checksum is important for IE, adjusting it - var CFF_CHECKSUM_OFFSET = 16; - var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X' - var checksum = int32(data, CFF_CHECKSUM_OFFSET); - for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) { - checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0; - } - if (i < loadTestFontId.length) { // align to 4 bytes boundary - checksum = (checksum - XXXX_VALUE + - int32(loadTestFontId + 'XXX', i)) | 0; - } - data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum)); + hasChunk: function ChunkedStream_hasChunk(chunk) { + return chunk in this.loadedChunks; + }, - var url = 'url(data:font/opentype;base64,' + btoa(data) + ');'; - var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' + - url + '}'; - FontLoader.insertRule(rule); + get length() { + return this.end - this.start; + }, - var names = []; - for (i = 0, ii = fonts.length; i < ii; i++) { - names.push(fonts[i].loadedName); - } - names.push(loadTestFontId); + get isEmpty() { + return this.length === 0; + }, - var div = document.createElement('div'); - div.setAttribute('style', - 'visibility: hidden;' + - 'width: 10px; height: 10px;' + - 'position: absolute; top: 0px; left: 0px;'); - for (i = 0, ii = names.length; i < ii; ++i) { - var span = document.createElement('span'); - span.textContent = 'Hi'; - span.style.fontFamily = names[i]; - div.appendChild(span); + getByte: function ChunkedStream_getByte() { + var pos = this.pos; + if (pos >= this.end) { + return -1; } - document.body.appendChild(div); + this.ensureByte(pos); + return this.bytes[this.pos++]; + }, - isFontReady(loadTestFontId, function() { - document.body.removeChild(div); - request.complete(); - }); - /** Hack end */ - } -}; + getUint16: function ChunkedStream_getUint16() { + var b0 = this.getByte(); + var b1 = this.getByte(); + return (b0 << 8) + b1; + }, -var FontFace = (function FontFaceClosure() { - function FontFace(name, file, properties) { - this.compiledGlyphs = {}; - if (arguments.length === 1) { - // importing translated data - var data = arguments[0]; - for (var i in data) { - this[i] = data[i]; - } - return; - } - } - FontFace.prototype = { - bindDOM: function FontFace_bindDOM() { - if (!this.data) { - return null; + getInt32: function ChunkedStream_getInt32() { + var b0 = this.getByte(); + var b1 = this.getByte(); + var b2 = this.getByte(); + var b3 = this.getByte(); + return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + }, + + // returns subarray of original buffer + // should only be read + getBytes: function ChunkedStream_getBytes(length) { + var bytes = this.bytes; + var pos = this.pos; + var strEnd = this.end; + + if (!length) { + this.ensureRange(pos, strEnd); + return bytes.subarray(pos, strEnd); } - if (PDFJS.disableFontFace) { - this.disableFontFace = true; - return null; + var end = pos + length; + if (end > strEnd) { + end = strEnd; } + this.ensureRange(pos, end); - var data = bytesToString(new Uint8Array(this.data)); - var fontName = this.loadedName; + this.pos = end; + return bytes.subarray(pos, end); + }, - // Add the font-face rule to the document - var url = ('url(data:' + this.mimetype + ';base64,' + - window.btoa(data) + ');'); - var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}'; - FontLoader.insertRule(rule); + peekBytes: function ChunkedStream_peekBytes(length) { + var bytes = this.getBytes(length); + this.pos -= bytes.length; + return bytes; + }, - if (PDFJS.pdfBug && 'FontInspector' in globalScope && - globalScope['FontInspector'].enabled) { - globalScope['FontInspector'].fontAdded(this, url); + getByteRange: function ChunkedStream_getBytes(begin, end) { + this.ensureRange(begin, end); + return this.bytes.subarray(begin, end); + }, + + skip: function ChunkedStream_skip(n) { + if (!n) { + n = 1; } + this.pos += n; + }, - return rule; + reset: function ChunkedStream_reset() { + this.pos = this.start; }, - getPathGenerator: function (objs, character) { - if (!(character in this.compiledGlyphs)) { - var js = objs.get(this.loadedName + '_path_' + character); - /*jshint -W054 */ - this.compiledGlyphs[character] = new Function('c', 'size', js); - } - return this.compiledGlyphs[character]; - } - }; - return FontFace; -})(); + moveStart: function ChunkedStream_moveStart() { + this.start = this.pos; + }, + makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { + this.ensureRange(start, start + length); + function ChunkedStreamSubstream() {} + ChunkedStreamSubstream.prototype = Object.create(this); + ChunkedStreamSubstream.prototype.getMissingChunks = function() { + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(this.start / chunkSize); + var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; + var missingChunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + missingChunks.push(chunk); + } + } + return missingChunks; + }; + var subStream = new ChunkedStreamSubstream(); + subStream.pos = subStream.start = start; + subStream.end = start + length || this.end; + subStream.dict = dict; + return subStream; + }, + isStream: true + }; -var NetworkManager = (function NetworkManagerClosure() { + return ChunkedStream; +})(); - var OK_RESPONSE = 200; - var PARTIAL_CONTENT_RESPONSE = 206; +var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { - function NetworkManager(url, args) { + function ChunkedStreamManager(length, chunkSize, url, args) { + this.stream = new ChunkedStream(length, chunkSize, this); + this.length = length; + this.chunkSize = chunkSize; this.url = url; - args = args || {}; - this.isHttp = /^https?:/i.test(url); - this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; - this.withCredentials = args.withCredentials || false; - this.getXhr = args.getXhr || - function NetworkManager_getXhr() { + this.disableAutoFetch = args.disableAutoFetch; + var msgHandler = this.msgHandler = args.msgHandler; + + if (args.chunkedViewerLoading) { + msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); + msgHandler.on('OnDataProgress', this.onProgress.bind(this)); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + msgHandler.send('RequestDataRange', { begin: begin, end: end }); + }; + } else { + + var getXhr = function getXhr() { return new XMLHttpRequest(); }; + this.networkManager = new NetworkManager(this.url, { + getXhr: getXhr, + httpHeaders: args.httpHeaders, + withCredentials: args.withCredentials + }); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + this.networkManager.requestRange(begin, end, { + onDone: this.onReceiveData.bind(this), + onProgress: this.onProgress.bind(this) + }); + }; + } - this.currXhrId = 0; - this.pendingRequests = {}; - this.loadedRequests = {}; - } + this.currRequestId = 0; - function getArrayBuffer(xhr) { - var data = xhr.response; - if (typeof data !== 'string') { - return data; - } - var length = data.length; - var buffer = new Uint8Array(length); - for (var i = 0; i < length; i++) { - buffer[i] = data.charCodeAt(i) & 0xFF; + this.chunksNeededByRequest = {}; + this.requestsByChunk = {}; + this.callbacksByRequest = {}; + + this._loadedStreamCapability = createPromiseCapability(); + + if (args.initialData) { + this.setInitialData(args.initialData); } - return buffer; } - NetworkManager.prototype = { - requestRange: function NetworkManager_requestRange(begin, end, listeners) { - var args = { - begin: begin, - end: end - }; - for (var prop in listeners) { - args[prop] = listeners[prop]; - } - return this.request(args); - }, + ChunkedStreamManager.prototype = { - requestFull: function NetworkManager_requestRange(listeners) { - return this.request(listeners); - }, - - request: function NetworkManager_requestRange(args) { - var xhr = this.getXhr(); - var xhrId = this.currXhrId++; - var pendingRequest = this.pendingRequests[xhrId] = { - xhr: xhr - }; - - xhr.open('GET', this.url); - xhr.withCredentials = this.withCredentials; - for (var property in this.httpHeaders) { - var value = this.httpHeaders[property]; - if (typeof value === 'undefined') { - continue; - } - xhr.setRequestHeader(property, value); - } - if (this.isHttp && 'begin' in args && 'end' in args) { - var rangeStr = args.begin + '-' + (args.end - 1); - xhr.setRequestHeader('Range', 'bytes=' + rangeStr); - pendingRequest.expectedStatus = 206; - } else { - pendingRequest.expectedStatus = 200; - } - - xhr.responseType = 'arraybuffer'; - - if (args.onProgress) { - xhr.onprogress = args.onProgress; - } - if (args.onError) { - xhr.onerror = function(evt) { - args.onError(xhr.status); - }; + setInitialData: function ChunkedStreamManager_setInitialData(data) { + this.stream.onReceiveInitialData(data); + if (this.stream.allChunksLoaded()) { + this._loadedStreamCapability.resolve(this.stream); + } else if (this.msgHandler) { + this.msgHandler.send('DocProgress', { + loaded: data.length, + total: this.length + }); } - xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); - - pendingRequest.onHeadersReceived = args.onHeadersReceived; - pendingRequest.onDone = args.onDone; - pendingRequest.onError = args.onError; - - xhr.send(null); + }, - return xhrId; + onLoadedStream: function ChunkedStreamManager_getLoadedStream() { + return this._loadedStreamCapability.promise; }, - onStateChange: function NetworkManager_onStateChange(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } + // Get all the chunks that are not yet loaded and groups them into + // contiguous ranges to load in as few requests as possible + requestAllChunks: function ChunkedStreamManager_requestAllChunks() { + var missingChunks = this.stream.getMissingChunks(); + this.requestChunks(missingChunks); + return this._loadedStreamCapability.promise; + }, - var xhr = pendingRequest.xhr; - if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { - pendingRequest.onHeadersReceived(); - delete pendingRequest.onHeadersReceived; - } + requestChunks: function ChunkedStreamManager_requestChunks(chunks, + callback) { + var requestId = this.currRequestId++; - if (xhr.readyState !== 4) { - return; + var chunksNeeded; + var i, ii; + this.chunksNeededByRequest[requestId] = chunksNeeded = {}; + for (i = 0, ii = chunks.length; i < ii; i++) { + if (!this.stream.hasChunk(chunks[i])) { + chunksNeeded[chunks[i]] = true; + } } - if (!(xhrId in this.pendingRequests)) { - // The XHR request might have been aborted in onHeadersReceived() - // callback, in which case we should abort request + if (isEmptyObj(chunksNeeded)) { + if (callback) { + callback(); + } return; } - delete this.pendingRequests[xhrId]; + this.callbacksByRequest[requestId] = callback; - // success status == 0 can be on ftp, file and other protocols - if (xhr.status === 0 && this.isHttp) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); + var chunksToRequest = []; + for (var chunk in chunksNeeded) { + chunk = chunk | 0; + if (!(chunk in this.requestsByChunk)) { + this.requestsByChunk[chunk] = []; + chunksToRequest.push(chunk); } - return; + this.requestsByChunk[chunk].push(requestId); } - var xhrStatus = xhr.status || OK_RESPONSE; - - // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: - // "A server MAY ignore the Range header". This means it's possible to - // get a 200 rather than a 206 response from a range request. - var ok_response_on_range_request = - xhrStatus === OK_RESPONSE && - pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; - if (!ok_response_on_range_request && - xhrStatus !== pendingRequest.expectedStatus) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } + if (!chunksToRequest.length) { return; } - this.loadedRequests[xhrId] = true; + var groupedChunksToRequest = this.groupChunks(chunksToRequest); - var chunk = getArrayBuffer(xhr); - if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { - var rangeHeader = xhr.getResponseHeader('Content-Range'); - var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); - var begin = parseInt(matches[1], 10); - pendingRequest.onDone({ - begin: begin, - chunk: chunk - }); - } else { - pendingRequest.onDone({ - begin: 0, - chunk: chunk - }); + for (i = 0; i < groupedChunksToRequest.length; ++i) { + var groupedChunk = groupedChunksToRequest[i]; + var begin = groupedChunk.beginChunk * this.chunkSize; + var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); + this.sendRequest(begin, end); } }, - hasPendingRequests: function NetworkManager_hasPendingRequests() { - for (var xhrId in this.pendingRequests) { - return true; - } - return false; + getStream: function ChunkedStreamManager_getStream() { + return this.stream; }, - getRequestXhr: function NetworkManager_getXhr(xhrId) { - return this.pendingRequests[xhrId].xhr; - }, + // Loads any chunks in the requested range that are not yet loaded + requestRange: function ChunkedStreamManager_requestRange( + begin, end, callback) { - isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { - return xhrId in this.pendingRequests; - }, + end = Math.min(end, this.length); - isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { - return xhrId in this.loadedRequests; - }, + var beginChunk = this.getBeginChunk(begin); + var endChunk = this.getEndChunk(end); - abortAllRequests: function NetworkManager_abortAllRequests() { - for (var xhrId in this.pendingRequests) { - this.abortRequest(xhrId | 0); + var chunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + chunks.push(chunk); } - }, - abortRequest: function NetworkManager_abortRequest(xhrId) { - var xhr = this.pendingRequests[xhrId].xhr; - delete this.pendingRequests[xhrId]; - xhr.abort(); - } - }; + this.requestChunks(chunks, callback); + }, - return NetworkManager; -})(); + requestRanges: function ChunkedStreamManager_requestRanges(ranges, + callback) { + ranges = ranges || []; + var chunksToRequest = []; + for (var i = 0; i < ranges.length; i++) { + var beginChunk = this.getBeginChunk(ranges[i].begin); + var endChunk = this.getEndChunk(ranges[i].end); + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (chunksToRequest.indexOf(chunk) < 0) { + chunksToRequest.push(chunk); + } + } + } + chunksToRequest.sort(function(a, b) { return a - b; }); + this.requestChunks(chunksToRequest, callback); + }, -var ChunkedStream = (function ChunkedStreamClosure() { - function ChunkedStream(length, chunkSize, manager) { - this.bytes = new Uint8Array(length); - this.start = 0; - this.pos = 0; - this.end = length; - this.chunkSize = chunkSize; - this.loadedChunks = []; - this.numChunksLoaded = 0; - this.numChunks = Math.ceil(length / chunkSize); - this.manager = manager; - this.initialDataLength = 0; - this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache - } + // Groups a sorted array of chunks into as few continguous larger + // chunks as possible + groupChunks: function ChunkedStreamManager_groupChunks(chunks) { + var groupedChunks = []; + var beginChunk = -1; + var prevChunk = -1; + for (var i = 0; i < chunks.length; ++i) { + var chunk = chunks[i]; - // required methods for a stream. if a particular stream does not - // implement these, an error should be thrown - ChunkedStream.prototype = { + if (beginChunk < 0) { + beginChunk = chunk; + } - getMissingChunks: function ChunkedStream_getMissingChunks() { - var chunks = []; - for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { - if (!(chunk in this.loadedChunks)) { - chunks.push(chunk); + if (prevChunk >= 0 && prevChunk + 1 !== chunk) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: prevChunk + 1 }); + beginChunk = chunk; + } + if (i + 1 === chunks.length) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: chunk + 1 }); } - } - return chunks; - }, - getBaseStreams: function ChunkedStream_getBaseStreams() { - return [this]; + prevChunk = chunk; + } + return groupedChunks; }, - allChunksLoaded: function ChunkedStream_allChunksLoaded() { - return this.numChunksLoaded === this.numChunks; + onProgress: function ChunkedStreamManager_onProgress(args) { + var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + + args.loaded); + this.msgHandler.send('DocProgress', { + loaded: bytesLoaded, + total: this.length + }); }, - onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { - var end = begin + chunk.byteLength; - - assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); - // Using this.length is inaccurate here since this.start can be moved - // See ChunkedStream.moveStart() - var length = this.bytes.length; - assert(end % this.chunkSize === 0 || end === length, - 'Bad end offset: ' + end); - - this.bytes.set(new Uint8Array(chunk), begin); - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - var curChunk; - - for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { - if (!(curChunk in this.loadedChunks)) { - this.loadedChunks[curChunk] = true; - ++this.numChunksLoaded; - } - } - }, + onReceiveData: function ChunkedStreamManager_onReceiveData(args) { + var chunk = args.chunk; + var begin = args.begin; + var end = begin + chunk.byteLength; - onReceiveInitialData: function ChunkedStream_onReceiveInitialData(data) { - this.bytes.set(data); - this.initialDataLength = data.length; - var endChunk = (this.end === data.length ? - this.numChunks : Math.floor(data.length / this.chunkSize)); - for (var i = 0; i < endChunk; i++) { - this.loadedChunks[i] = true; - ++this.numChunksLoaded; - } - }, + var beginChunk = this.getBeginChunk(begin); + var endChunk = this.getEndChunk(end); - ensureByte: function ChunkedStream_ensureRange(pos) { - var chunk = Math.floor(pos / this.chunkSize); - if (chunk === this.lastSuccessfulEnsureByteChunk) { - return; + this.stream.onReceiveData(begin, chunk); + if (this.stream.allChunksLoaded()) { + this._loadedStreamCapability.resolve(this.stream); } - if (!(chunk in this.loadedChunks)) { - throw new MissingDataException(pos, pos + 1); - } - this.lastSuccessfulEnsureByteChunk = chunk; - }, + var loadedRequests = []; + var i, requestId; + for (chunk = beginChunk; chunk < endChunk; ++chunk) { + // The server might return more chunks than requested + var requestIds = this.requestsByChunk[chunk] || []; + delete this.requestsByChunk[chunk]; - ensureRange: function ChunkedStream_ensureRange(begin, end) { - if (begin >= end) { - return; - } + for (i = 0; i < requestIds.length; ++i) { + requestId = requestIds[i]; + var chunksNeeded = this.chunksNeededByRequest[requestId]; + if (chunk in chunksNeeded) { + delete chunksNeeded[chunk]; + } - if (end <= this.initialDataLength) { - return; - } + if (!isEmptyObj(chunksNeeded)) { + continue; + } - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - throw new MissingDataException(begin, end); + loadedRequests.push(requestId); } } - }, - nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { - var chunk, n; - for (chunk = beginChunk, n = this.numChunks; chunk < n; ++chunk) { - if (!(chunk in this.loadedChunks)) { - return chunk; + // If there are no pending requests, automatically fetch the next + // unfetched chunk of the PDF + if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { + var nextEmptyChunk; + if (this.stream.numChunksLoaded === 1) { + // This is a special optimization so that after fetching the first + // chunk, rather than fetching the second chunk, we fetch the last + // chunk. + var lastChunk = this.stream.numChunks - 1; + if (!this.stream.hasChunk(lastChunk)) { + nextEmptyChunk = lastChunk; + } + } else { + nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); + } + if (isInt(nextEmptyChunk)) { + this.requestChunks([nextEmptyChunk]); } } - // Wrap around to beginning - for (chunk = 0; chunk < beginChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - return chunk; + + for (i = 0; i < loadedRequests.length; ++i) { + requestId = loadedRequests[i]; + var callback = this.callbacksByRequest[requestId]; + delete this.callbacksByRequest[requestId]; + if (callback) { + callback(); } } - return null; - }, - hasChunk: function ChunkedStream_hasChunk(chunk) { - return chunk in this.loadedChunks; + this.msgHandler.send('DocProgress', { + loaded: this.stream.numChunksLoaded * this.chunkSize, + total: this.length + }); }, - get length() { - return this.end - this.start; + onError: function ChunkedStreamManager_onError(err) { + this._loadedStreamCapability.reject(err); }, - get isEmpty() { - return this.length === 0; + getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { + var chunk = Math.floor(begin / this.chunkSize); + return chunk; }, - getByte: function ChunkedStream_getByte() { - var pos = this.pos; - if (pos >= this.end) { - return -1; + getEndChunk: function ChunkedStreamManager_getEndChunk(end) { + if (end % this.chunkSize === 0) { + return end / this.chunkSize; } - this.ensureByte(pos); - return this.bytes[this.pos++]; - }, - getUint16: function ChunkedStream_getUint16() { - var b0 = this.getByte(); - var b1 = this.getByte(); - return (b0 << 8) + b1; - }, + // 0 -> 0 + // 1 -> 1 + // 99 -> 1 + // 100 -> 1 + // 101 -> 2 + var chunk = Math.floor((end - 1) / this.chunkSize) + 1; + return chunk; + } + }; - getInt32: function ChunkedStream_getInt32() { - var b0 = this.getByte(); - var b1 = this.getByte(); - var b2 = this.getByte(); - var b3 = this.getByte(); - return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; - }, + return ChunkedStreamManager; +})(); - // returns subarray of original buffer - // should only be read - getBytes: function ChunkedStream_getBytes(length) { - var bytes = this.bytes; - var pos = this.pos; - var strEnd = this.end; - if (!length) { - this.ensureRange(pos, strEnd); - return bytes.subarray(pos, strEnd); - } - var end = pos + length; - if (end > strEnd) { - end = strEnd; - } - this.ensureRange(pos, end); +// The maximum number of bytes fetched per range request +var RANGE_CHUNK_SIZE = 65536; - this.pos = end; - return bytes.subarray(pos, end); +// TODO(mack): Make use of PDFJS.Util.inherit() when it becomes available +var BasePdfManager = (function BasePdfManagerClosure() { + function BasePdfManager() { + throw new Error('Cannot initialize BaseManagerManager'); + } + + BasePdfManager.prototype = { + onLoadedStream: function BasePdfManager_onLoadedStream() { + throw new NotImplementedException(); }, - peekBytes: function ChunkedStream_peekBytes(length) { - var bytes = this.getBytes(length); - this.pos -= bytes.length; - return bytes; + ensureDoc: function BasePdfManager_ensureDoc(prop, args) { + return this.ensure(this.pdfDocument, prop, args); }, - getByteRange: function ChunkedStream_getBytes(begin, end) { - this.ensureRange(begin, end); - return this.bytes.subarray(begin, end); + ensureXRef: function BasePdfManager_ensureXRef(prop, args) { + return this.ensure(this.pdfDocument.xref, prop, args); }, - skip: function ChunkedStream_skip(n) { - if (!n) { - n = 1; - } - this.pos += n; + ensureCatalog: function BasePdfManager_ensureCatalog(prop, args) { + return this.ensure(this.pdfDocument.catalog, prop, args); }, - reset: function ChunkedStream_reset() { - this.pos = this.start; + getPage: function BasePdfManager_pagePage(pageIndex) { + return this.pdfDocument.getPage(pageIndex); }, - moveStart: function ChunkedStream_moveStart() { - this.start = this.pos; + cleanup: function BasePdfManager_cleanup() { + return this.pdfDocument.cleanup(); }, - makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { - this.ensureRange(start, start + length); + ensure: function BasePdfManager_ensure(obj, prop, args) { + return new NotImplementedException(); + }, - function ChunkedStreamSubstream() {} - ChunkedStreamSubstream.prototype = Object.create(this); - ChunkedStreamSubstream.prototype.getMissingChunks = function() { - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(this.start / chunkSize); - var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; - var missingChunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - missingChunks.push(chunk); - } - } - return missingChunks; - }; - var subStream = new ChunkedStreamSubstream(); - subStream.pos = subStream.start = start; - subStream.end = start + length || this.end; - subStream.dict = dict; - return subStream; + requestRange: function BasePdfManager_ensure(begin, end) { + return new NotImplementedException(); }, - isStream: true - }; + requestLoadedStream: function BasePdfManager_requestLoadedStream() { + return new NotImplementedException(); + }, - return ChunkedStream; -})(); + updatePassword: function BasePdfManager_updatePassword(password) { + this.pdfDocument.xref.password = this.password = password; + if (this._passwordChangedCapability) { + this._passwordChangedCapability.resolve(); + } + }, -var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { - - function ChunkedStreamManager(length, chunkSize, url, args) { - this.stream = new ChunkedStream(length, chunkSize, this); - this.length = length; - this.chunkSize = chunkSize; - this.url = url; - this.disableAutoFetch = args.disableAutoFetch; - var msgHandler = this.msgHandler = args.msgHandler; - - if (args.chunkedViewerLoading) { - msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); - msgHandler.on('OnDataProgress', this.onProgress.bind(this)); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - msgHandler.send('RequestDataRange', { begin: begin, end: end }); - }; - } else { + passwordChanged: function BasePdfManager_passwordChanged() { + this._passwordChangedCapability = createPromiseCapability(); + return this._passwordChangedCapability.promise; + }, - var getXhr = function getXhr() { - return new XMLHttpRequest(); - }; - this.networkManager = new NetworkManager(this.url, { - getXhr: getXhr, - httpHeaders: args.httpHeaders, - withCredentials: args.withCredentials - }); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - this.networkManager.requestRange(begin, end, { - onDone: this.onReceiveData.bind(this), - onProgress: this.onProgress.bind(this) - }); - }; + terminate: function BasePdfManager_terminate() { + return new NotImplementedException(); } + }; - this.currRequestId = 0; - - this.chunksNeededByRequest = {}; - this.requestsByChunk = {}; - this.callbacksByRequest = {}; + return BasePdfManager; +})(); +var LocalPdfManager = (function LocalPdfManagerClosure() { + function LocalPdfManager(data, password) { + var stream = new Stream(data); + this.pdfDocument = new PDFDocument(this, stream, password); this._loadedStreamCapability = createPromiseCapability(); - - if (args.initialData) { - this.setInitialData(args.initialData); - } + this._loadedStreamCapability.resolve(stream); } - ChunkedStreamManager.prototype = { + LocalPdfManager.prototype = Object.create(BasePdfManager.prototype); + LocalPdfManager.prototype.constructor = LocalPdfManager; - setInitialData: function ChunkedStreamManager_setInitialData(data) { - this.stream.onReceiveInitialData(data); - if (this.stream.allChunksLoaded()) { - this._loadedStreamCapability.resolve(this.stream); - } else if (this.msgHandler) { - this.msgHandler.send('DocProgress', { - loaded: data.length, - total: this.length - }); + LocalPdfManager.prototype.ensure = + function LocalPdfManager_ensure(obj, prop, args) { + return new Promise(function (resolve, reject) { + try { + var value = obj[prop]; + var result; + if (typeof value === 'function') { + result = value.apply(obj, args); + } else { + result = value; + } + resolve(result); + } catch (e) { + reject(e); } - }, + }); + }; - onLoadedStream: function ChunkedStreamManager_getLoadedStream() { - return this._loadedStreamCapability.promise; - }, + LocalPdfManager.prototype.requestRange = + function LocalPdfManager_requestRange(begin, end) { + return Promise.resolve(); + }; - // Get all the chunks that are not yet loaded and groups them into - // contiguous ranges to load in as few requests as possible - requestAllChunks: function ChunkedStreamManager_requestAllChunks() { - var missingChunks = this.stream.getMissingChunks(); - this.requestChunks(missingChunks); - return this._loadedStreamCapability.promise; - }, + LocalPdfManager.prototype.requestLoadedStream = + function LocalPdfManager_requestLoadedStream() { + }; - requestChunks: function ChunkedStreamManager_requestChunks(chunks, - callback) { - var requestId = this.currRequestId++; + LocalPdfManager.prototype.onLoadedStream = + function LocalPdfManager_getLoadedStream() { + return this._loadedStreamCapability.promise; + }; - var chunksNeeded; - var i, ii; - this.chunksNeededByRequest[requestId] = chunksNeeded = {}; - for (i = 0, ii = chunks.length; i < ii; i++) { - if (!this.stream.hasChunk(chunks[i])) { - chunksNeeded[chunks[i]] = true; - } - } + LocalPdfManager.prototype.terminate = + function LocalPdfManager_terminate() { + return; + }; - if (isEmptyObj(chunksNeeded)) { - if (callback) { - callback(); - } - return; - } + return LocalPdfManager; +})(); - this.callbacksByRequest[requestId] = callback; +var NetworkPdfManager = (function NetworkPdfManagerClosure() { + function NetworkPdfManager(args, msgHandler) { - var chunksToRequest = []; - for (var chunk in chunksNeeded) { - chunk = chunk | 0; - if (!(chunk in this.requestsByChunk)) { - this.requestsByChunk[chunk] = []; - chunksToRequest.push(chunk); - } - this.requestsByChunk[chunk].push(requestId); - } + this.msgHandler = msgHandler; - if (!chunksToRequest.length) { - return; - } + var params = { + msgHandler: msgHandler, + httpHeaders: args.httpHeaders, + withCredentials: args.withCredentials, + chunkedViewerLoading: args.chunkedViewerLoading, + disableAutoFetch: args.disableAutoFetch, + initialData: args.initialData + }; + this.streamManager = new ChunkedStreamManager(args.length, RANGE_CHUNK_SIZE, + args.url, params); - var groupedChunksToRequest = this.groupChunks(chunksToRequest); + this.pdfDocument = new PDFDocument(this, this.streamManager.getStream(), + args.password); + } - for (i = 0; i < groupedChunksToRequest.length; ++i) { - var groupedChunk = groupedChunksToRequest[i]; - var begin = groupedChunk.beginChunk * this.chunkSize; - var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); - this.sendRequest(begin, end); - } - }, + NetworkPdfManager.prototype = Object.create(BasePdfManager.prototype); + NetworkPdfManager.prototype.constructor = NetworkPdfManager; - getStream: function ChunkedStreamManager_getStream() { - return this.stream; - }, + NetworkPdfManager.prototype.ensure = + function NetworkPdfManager_ensure(obj, prop, args) { + var pdfManager = this; - // Loads any chunks in the requested range that are not yet loaded - requestRange: function ChunkedStreamManager_requestRange( - begin, end, callback) { + return new Promise(function (resolve, reject) { + function ensureHelper() { + try { + var result; + var value = obj[prop]; + if (typeof value === 'function') { + result = value.apply(obj, args); + } else { + result = value; + } + resolve(result); + } catch(e) { + if (!(e instanceof MissingDataException)) { + reject(e); + return; + } + pdfManager.streamManager.requestRange(e.begin, e.end, ensureHelper); + } + } - end = Math.min(end, this.length); + ensureHelper(); + }); + }; - var beginChunk = this.getBeginChunk(begin); - var endChunk = this.getEndChunk(end); + NetworkPdfManager.prototype.requestRange = + function NetworkPdfManager_requestRange(begin, end) { + return new Promise(function (resolve) { + this.streamManager.requestRange(begin, end, function() { + resolve(); + }); + }.bind(this)); + }; - var chunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - chunks.push(chunk); - } + NetworkPdfManager.prototype.requestLoadedStream = + function NetworkPdfManager_requestLoadedStream() { + this.streamManager.requestAllChunks(); + }; - this.requestChunks(chunks, callback); - }, + NetworkPdfManager.prototype.onLoadedStream = + function NetworkPdfManager_getLoadedStream() { + return this.streamManager.onLoadedStream(); + }; - requestRanges: function ChunkedStreamManager_requestRanges(ranges, - callback) { - ranges = ranges || []; - var chunksToRequest = []; + NetworkPdfManager.prototype.terminate = + function NetworkPdfManager_terminate() { + this.streamManager.networkManager.abortAllRequests(); + }; - for (var i = 0; i < ranges.length; i++) { - var beginChunk = this.getBeginChunk(ranges[i].begin); - var endChunk = this.getEndChunk(ranges[i].end); - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (chunksToRequest.indexOf(chunk) < 0) { - chunksToRequest.push(chunk); - } - } - } + return NetworkPdfManager; +})(); - chunksToRequest.sort(function(a, b) { return a - b; }); - this.requestChunks(chunksToRequest, callback); - }, - // Groups a sorted array of chunks into as few continguous larger - // chunks as possible - groupChunks: function ChunkedStreamManager_groupChunks(chunks) { - var groupedChunks = []; - var beginChunk = -1; - var prevChunk = -1; - for (var i = 0; i < chunks.length; ++i) { - var chunk = chunks[i]; - if (beginChunk < 0) { - beginChunk = chunk; - } +var Page = (function PageClosure() { - if (prevChunk >= 0 && prevChunk + 1 !== chunk) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: prevChunk + 1 }); - beginChunk = chunk; - } - if (i + 1 === chunks.length) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: chunk + 1 }); - } + var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792]; - prevChunk = chunk; - } - return groupedChunks; - }, + function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) { + this.pdfManager = pdfManager; + this.pageIndex = pageIndex; + this.pageDict = pageDict; + this.xref = xref; + this.ref = ref; + this.fontCache = fontCache; + this.idCounters = { + obj: 0 + }; + this.resourcesPromise = null; + } - onProgress: function ChunkedStreamManager_onProgress(args) { - var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + - args.loaded); - this.msgHandler.send('DocProgress', { - loaded: bytesLoaded, - total: this.length - }); + Page.prototype = { + getPageProp: function Page_getPageProp(key) { + return this.pageDict.get(key); }, - onReceiveData: function ChunkedStreamManager_onReceiveData(args) { - var chunk = args.chunk; - var begin = args.begin; - var end = begin + chunk.byteLength; - - var beginChunk = this.getBeginChunk(begin); - var endChunk = this.getEndChunk(end); - - this.stream.onReceiveData(begin, chunk); - if (this.stream.allChunksLoaded()) { - this._loadedStreamCapability.resolve(this.stream); - } - - var loadedRequests = []; - var i, requestId; - for (chunk = beginChunk; chunk < endChunk; ++chunk) { - // The server might return more chunks than requested - var requestIds = this.requestsByChunk[chunk] || []; - delete this.requestsByChunk[chunk]; - - for (i = 0; i < requestIds.length; ++i) { - requestId = requestIds[i]; - var chunksNeeded = this.chunksNeededByRequest[requestId]; - if (chunk in chunksNeeded) { - delete chunksNeeded[chunk]; - } - - if (!isEmptyObj(chunksNeeded)) { - continue; - } - - loadedRequests.push(requestId); - } - } - - // If there are no pending requests, automatically fetch the next - // unfetched chunk of the PDF - if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { - var nextEmptyChunk; - if (this.stream.numChunksLoaded === 1) { - // This is a special optimization so that after fetching the first - // chunk, rather than fetching the second chunk, we fetch the last - // chunk. - var lastChunk = this.stream.numChunks - 1; - if (!this.stream.hasChunk(lastChunk)) { - nextEmptyChunk = lastChunk; - } - } else { - nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); - } - if (isInt(nextEmptyChunk)) { - this.requestChunks([nextEmptyChunk]); - } - } - - for (i = 0; i < loadedRequests.length; ++i) { - requestId = loadedRequests[i]; - var callback = this.callbacksByRequest[requestId]; - delete this.callbacksByRequest[requestId]; - if (callback) { - callback(); + getInheritedPageProp: function Page_inheritPageProp(key) { + var dict = this.pageDict; + var value = dict.get(key); + while (value === undefined) { + dict = dict.get('Parent'); + if (!dict) { + break; } + value = dict.get(key); } - - this.msgHandler.send('DocProgress', { - loaded: this.stream.numChunksLoaded * this.chunkSize, - total: this.length - }); - }, - - onError: function ChunkedStreamManager_onError(err) { - this._loadedStreamCapability.reject(err); + return value; }, - getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { - var chunk = Math.floor(begin / this.chunkSize); - return chunk; + get content() { + return this.getPageProp('Contents'); }, - getEndChunk: function ChunkedStreamManager_getEndChunk(end) { - if (end % this.chunkSize === 0) { - return end / this.chunkSize; + get resources() { + var value = this.getInheritedPageProp('Resources'); + // For robustness: The spec states that a \Resources entry has to be + // present, but can be empty. Some document omit it still. In this case + // return an empty dictionary: + if (value === undefined) { + value = Dict.empty; } - - // 0 -> 0 - // 1 -> 1 - // 99 -> 1 - // 100 -> 1 - // 101 -> 2 - var chunk = Math.floor((end - 1) / this.chunkSize) + 1; - return chunk; - } - }; - - return ChunkedStreamManager; -})(); - - - -// The maximum number of bytes fetched per range request -var RANGE_CHUNK_SIZE = 65536; - -// TODO(mack): Make use of PDFJS.Util.inherit() when it becomes available -var BasePdfManager = (function BasePdfManagerClosure() { - function BasePdfManager() { - throw new Error('Cannot initialize BaseManagerManager'); - } - - BasePdfManager.prototype = { - onLoadedStream: function BasePdfManager_onLoadedStream() { - throw new NotImplementedException(); - }, - - ensureDoc: function BasePdfManager_ensureDoc(prop, args) { - return this.ensure(this.pdfDocument, prop, args); - }, - - ensureXRef: function BasePdfManager_ensureXRef(prop, args) { - return this.ensure(this.pdfDocument.xref, prop, args); + return shadow(this, 'resources', value); }, - ensureCatalog: function BasePdfManager_ensureCatalog(prop, args) { - return this.ensure(this.pdfDocument.catalog, prop, args); + get mediaBox() { + var obj = this.getInheritedPageProp('MediaBox'); + // Reset invalid media box to letter size. + if (!isArray(obj) || obj.length !== 4) { + obj = LETTER_SIZE_MEDIABOX; + } + return shadow(this, 'mediaBox', obj); }, - getPage: function BasePdfManager_pagePage(pageIndex) { - return this.pdfDocument.getPage(pageIndex); - }, + get view() { + var mediaBox = this.mediaBox; + var cropBox = this.getInheritedPageProp('CropBox'); + if (!isArray(cropBox) || cropBox.length !== 4) { + return shadow(this, 'view', mediaBox); + } - cleanup: function BasePdfManager_cleanup() { - return this.pdfDocument.cleanup(); + // From the spec, 6th ed., p.963: + // "The crop, bleed, trim, and art boxes should not ordinarily + // extend beyond the boundaries of the media box. If they do, they are + // effectively reduced to their intersection with the media box." + cropBox = Util.intersect(cropBox, mediaBox); + if (!cropBox) { + return shadow(this, 'view', mediaBox); + } + return shadow(this, 'view', cropBox); }, - ensure: function BasePdfManager_ensure(obj, prop, args) { - return new NotImplementedException(); + get annotationRefs() { + return shadow(this, 'annotationRefs', + this.getInheritedPageProp('Annots')); }, - requestRange: function BasePdfManager_ensure(begin, end) { - return new NotImplementedException(); + get rotate() { + var rotate = this.getInheritedPageProp('Rotate') || 0; + // Normalize rotation so it's a multiple of 90 and between 0 and 270 + if (rotate % 90 !== 0) { + rotate = 0; + } else if (rotate >= 360) { + rotate = rotate % 360; + } else if (rotate < 0) { + // The spec doesn't cover negatives, assume its counterclockwise + // rotation. The following is the other implementation of modulo. + rotate = ((rotate % 360) + 360) % 360; + } + return shadow(this, 'rotate', rotate); }, - requestLoadedStream: function BasePdfManager_requestLoadedStream() { - return new NotImplementedException(); + getContentStream: function Page_getContentStream() { + var content = this.content; + var stream; + if (isArray(content)) { + // fetching items + var xref = this.xref; + var i, n = content.length; + var streams = []; + for (i = 0; i < n; ++i) { + streams.push(xref.fetchIfRef(content[i])); + } + stream = new StreamsSequenceStream(streams); + } else if (isStream(content)) { + stream = content; + } else { + // replacing non-existent page content with empty one + stream = new NullStream(); + } + return stream; }, - updatePassword: function BasePdfManager_updatePassword(password) { - this.pdfDocument.xref.password = this.password = password; - if (this._passwordChangedCapability) { - this._passwordChangedCapability.resolve(); + loadResources: function Page_loadResources(keys) { + if (!this.resourcesPromise) { + // TODO: add async getInheritedPageProp and remove this. + this.resourcesPromise = this.pdfManager.ensure(this, 'resources'); } + return this.resourcesPromise.then(function resourceSuccess() { + var objectLoader = new ObjectLoader(this.resources.map, + keys, + this.xref); + return objectLoader.load(); + }.bind(this)); }, - passwordChanged: function BasePdfManager_passwordChanged() { - this._passwordChangedCapability = createPromiseCapability(); - return this._passwordChangedCapability.promise; - }, + getOperatorList: function Page_getOperatorList(handler, intent) { + var self = this; - terminate: function BasePdfManager_terminate() { - return new NotImplementedException(); - } - }; - - return BasePdfManager; -})(); - -var LocalPdfManager = (function LocalPdfManagerClosure() { - function LocalPdfManager(data, password) { - var stream = new Stream(data); - this.pdfDocument = new PDFDocument(this, stream, password); - this._loadedStreamCapability = createPromiseCapability(); - this._loadedStreamCapability.resolve(stream); - } + var pdfManager = this.pdfManager; + var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', + []); + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'ColorSpace', + 'Pattern', + 'Shading', + 'XObject', + 'Font' + // ProcSet + // Properties + ]); - LocalPdfManager.prototype = Object.create(BasePdfManager.prototype); - LocalPdfManager.prototype.constructor = LocalPdfManager; + var partialEvaluator = new PartialEvaluator(pdfManager, this.xref, + handler, this.pageIndex, + 'p' + this.pageIndex + '_', + this.idCounters, + this.fontCache); - LocalPdfManager.prototype.ensure = - function LocalPdfManager_ensure(obj, prop, args) { - return new Promise(function (resolve, reject) { - try { - var value = obj[prop]; - var result; - if (typeof value === 'function') { - result = value.apply(obj, args); - } else { - result = value; - } - resolve(result); - } catch (e) { - reject(e); - } - }); - }; + var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]); + var pageListPromise = dataPromises.then(function(data) { + var contentStream = data[0]; + var opList = new OperatorList(intent, handler, self.pageIndex); - LocalPdfManager.prototype.requestRange = - function LocalPdfManager_requestRange(begin, end) { - return Promise.resolve(); - }; + handler.send('StartRenderPage', { + transparency: partialEvaluator.hasBlendModes(self.resources), + pageIndex: self.pageIndex, + intent: intent + }); + return partialEvaluator.getOperatorList(contentStream, self.resources, + opList).then(function () { + return opList; + }); + }); - LocalPdfManager.prototype.requestLoadedStream = - function LocalPdfManager_requestLoadedStream() { - }; + var annotationsPromise = pdfManager.ensure(this, 'annotations'); + return Promise.all([pageListPromise, annotationsPromise]).then( + function(datas) { + var pageOpList = datas[0]; + var annotations = datas[1]; - LocalPdfManager.prototype.onLoadedStream = - function LocalPdfManager_getLoadedStream() { - return this._loadedStreamCapability.promise; - }; + if (annotations.length === 0) { + pageOpList.flush(true); + return pageOpList; + } - LocalPdfManager.prototype.terminate = - function LocalPdfManager_terminate() { - return; - }; + var annotationsReadyPromise = Annotation.appendToOperatorList( + annotations, pageOpList, pdfManager, partialEvaluator, intent); + return annotationsReadyPromise.then(function () { + pageOpList.flush(true); + return pageOpList; + }); + }); + }, - return LocalPdfManager; -})(); + extractTextContent: function Page_extractTextContent() { + var handler = { + on: function nullHandlerOn() {}, + send: function nullHandlerSend() {} + }; -var NetworkPdfManager = (function NetworkPdfManagerClosure() { - function NetworkPdfManager(args, msgHandler) { + var self = this; - this.msgHandler = msgHandler; + var pdfManager = this.pdfManager; + var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', + []); - var params = { - msgHandler: msgHandler, - httpHeaders: args.httpHeaders, - withCredentials: args.withCredentials, - chunkedViewerLoading: args.chunkedViewerLoading, - disableAutoFetch: args.disableAutoFetch, - initialData: args.initialData - }; - this.streamManager = new ChunkedStreamManager(args.length, RANGE_CHUNK_SIZE, - args.url, params); + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'XObject', + 'Font' + ]); - this.pdfDocument = new PDFDocument(this, this.streamManager.getStream(), - args.password); - } + var dataPromises = Promise.all([contentStreamPromise, + resourcesPromise]); + return dataPromises.then(function(data) { + var contentStream = data[0]; + var partialEvaluator = new PartialEvaluator(pdfManager, self.xref, + handler, self.pageIndex, + 'p' + self.pageIndex + '_', + self.idCounters, + self.fontCache); - NetworkPdfManager.prototype = Object.create(BasePdfManager.prototype); - NetworkPdfManager.prototype.constructor = NetworkPdfManager; + return partialEvaluator.getTextContent(contentStream, + self.resources); + }); + }, - NetworkPdfManager.prototype.ensure = - function NetworkPdfManager_ensure(obj, prop, args) { - var pdfManager = this; + getAnnotationsData: function Page_getAnnotationsData() { + var annotations = this.annotations; + var annotationsData = []; + for (var i = 0, n = annotations.length; i < n; ++i) { + annotationsData.push(annotations[i].getData()); + } + return annotationsData; + }, - return new Promise(function (resolve, reject) { - function ensureHelper() { - try { - var result; - var value = obj[prop]; - if (typeof value === 'function') { - result = value.apply(obj, args); - } else { - result = value; - } - resolve(result); - } catch(e) { - if (!(e instanceof MissingDataException)) { - reject(e); - return; - } - pdfManager.streamManager.requestRange(e.begin, e.end, ensureHelper); + get annotations() { + var annotations = []; + var annotationRefs = (this.annotationRefs || []); + for (var i = 0, n = annotationRefs.length; i < n; ++i) { + var annotationRef = annotationRefs[i]; + var annotation = Annotation.fromRef(this.xref, annotationRef); + if (annotation) { + annotations.push(annotation); } } - - ensureHelper(); - }); - }; - - NetworkPdfManager.prototype.requestRange = - function NetworkPdfManager_requestRange(begin, end) { - return new Promise(function (resolve) { - this.streamManager.requestRange(begin, end, function() { - resolve(); - }); - }.bind(this)); - }; - - NetworkPdfManager.prototype.requestLoadedStream = - function NetworkPdfManager_requestLoadedStream() { - this.streamManager.requestAllChunks(); - }; - - NetworkPdfManager.prototype.onLoadedStream = - function NetworkPdfManager_getLoadedStream() { - return this.streamManager.onLoadedStream(); - }; - - NetworkPdfManager.prototype.terminate = - function NetworkPdfManager_terminate() { - this.streamManager.networkManager.abortAllRequests(); + return shadow(this, 'annotations', annotations); + } }; - return NetworkPdfManager; + return Page; })(); +/** + * The `PDFDocument` holds all the data of the PDF file. Compared to the + * `PDFDoc`, this one doesn't have any job management code. + * Right now there exists one PDFDocument on the main thread + one object + * for each worker. If there is no worker support enabled, there are two + * `PDFDocument` objects on the main thread created. + */ +var PDFDocument = (function PDFDocumentClosure() { + function PDFDocument(pdfManager, arg, password) { + if (isStream(arg)) { + init.call(this, pdfManager, arg, password); + } else if (isArrayBuffer(arg)) { + init.call(this, pdfManager, new Stream(arg), password); + } else { + error('PDFDocument: Unknown argument type'); + } + } - -var Page = (function PageClosure() { - - var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792]; - - function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) { + function init(pdfManager, stream, password) { + assert(stream.length > 0, 'stream must have data'); this.pdfManager = pdfManager; - this.pageIndex = pageIndex; - this.pageDict = pageDict; - this.xref = xref; - this.ref = ref; - this.fontCache = fontCache; - this.idCounters = { - obj: 0 - }; - this.resourcesPromise = null; - } - - Page.prototype = { - getPageProp: function Page_getPageProp(key) { - return this.pageDict.get(key); - }, - - getInheritedPageProp: function Page_inheritPageProp(key) { - var dict = this.pageDict; - var value = dict.get(key); - while (value === undefined) { - dict = dict.get('Parent'); - if (!dict) { - break; - } - value = dict.get(key); - } - return value; - }, - - get content() { - return this.getPageProp('Contents'); - }, - - get resources() { - var value = this.getInheritedPageProp('Resources'); - // For robustness: The spec states that a \Resources entry has to be - // present, but can be empty. Some document omit it still. In this case - // return an empty dictionary: - if (value === undefined) { - value = Dict.empty; - } - return shadow(this, 'resources', value); - }, - - get mediaBox() { - var obj = this.getInheritedPageProp('MediaBox'); - // Reset invalid media box to letter size. - if (!isArray(obj) || obj.length !== 4) { - obj = LETTER_SIZE_MEDIABOX; - } - return shadow(this, 'mediaBox', obj); - }, - - get view() { - var mediaBox = this.mediaBox; - var cropBox = this.getInheritedPageProp('CropBox'); - if (!isArray(cropBox) || cropBox.length !== 4) { - return shadow(this, 'view', mediaBox); - } - - // From the spec, 6th ed., p.963: - // "The crop, bleed, trim, and art boxes should not ordinarily - // extend beyond the boundaries of the media box. If they do, they are - // effectively reduced to their intersection with the media box." - cropBox = Util.intersect(cropBox, mediaBox); - if (!cropBox) { - return shadow(this, 'view', mediaBox); - } - return shadow(this, 'view', cropBox); - }, - - get annotationRefs() { - return shadow(this, 'annotationRefs', - this.getInheritedPageProp('Annots')); - }, - - get rotate() { - var rotate = this.getInheritedPageProp('Rotate') || 0; - // Normalize rotation so it's a multiple of 90 and between 0 and 270 - if (rotate % 90 !== 0) { - rotate = 0; - } else if (rotate >= 360) { - rotate = rotate % 360; - } else if (rotate < 0) { - // The spec doesn't cover negatives, assume its counterclockwise - // rotation. The following is the other implementation of modulo. - rotate = ((rotate % 360) + 360) % 360; - } - return shadow(this, 'rotate', rotate); - }, - - getContentStream: function Page_getContentStream() { - var content = this.content; - var stream; - if (isArray(content)) { - // fetching items - var xref = this.xref; - var i, n = content.length; - var streams = []; - for (i = 0; i < n; ++i) { - streams.push(xref.fetchIfRef(content[i])); - } - stream = new StreamsSequenceStream(streams); - } else if (isStream(content)) { - stream = content; - } else { - // replacing non-existent page content with empty one - stream = new NullStream(); - } - return stream; - }, - - loadResources: function Page_loadResources(keys) { - if (!this.resourcesPromise) { - // TODO: add async getInheritedPageProp and remove this. - this.resourcesPromise = this.pdfManager.ensure(this, 'resources'); - } - return this.resourcesPromise.then(function resourceSuccess() { - var objectLoader = new ObjectLoader(this.resources.map, - keys, - this.xref); - return objectLoader.load(); - }.bind(this)); - }, - - getOperatorList: function Page_getOperatorList(handler, intent) { - var self = this; - - var pdfManager = this.pdfManager; - var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', - []); - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'ColorSpace', - 'Pattern', - 'Shading', - 'XObject', - 'Font' - // ProcSet - // Properties - ]); - - var partialEvaluator = new PartialEvaluator(pdfManager, this.xref, - handler, this.pageIndex, - 'p' + this.pageIndex + '_', - this.idCounters, - this.fontCache); - - var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]); - var pageListPromise = dataPromises.then(function(data) { - var contentStream = data[0]; - var opList = new OperatorList(intent, handler, self.pageIndex); - - handler.send('StartRenderPage', { - transparency: partialEvaluator.hasBlendModes(self.resources), - pageIndex: self.pageIndex, - intent: intent - }); - return partialEvaluator.getOperatorList(contentStream, self.resources, - opList).then(function () { - return opList; - }); - }); - - var annotationsPromise = pdfManager.ensure(this, 'annotations'); - return Promise.all([pageListPromise, annotationsPromise]).then( - function(datas) { - var pageOpList = datas[0]; - var annotations = datas[1]; - - if (annotations.length === 0) { - pageOpList.flush(true); - return pageOpList; - } - - var annotationsReadyPromise = Annotation.appendToOperatorList( - annotations, pageOpList, pdfManager, partialEvaluator, intent); - return annotationsReadyPromise.then(function () { - pageOpList.flush(true); - return pageOpList; - }); - }); - }, - - extractTextContent: function Page_extractTextContent() { - var handler = { - on: function nullHandlerOn() {}, - send: function nullHandlerSend() {} - }; - - var self = this; - - var pdfManager = this.pdfManager; - var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', - []); - - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'XObject', - 'Font' - ]); - - var dataPromises = Promise.all([contentStreamPromise, - resourcesPromise]); - return dataPromises.then(function(data) { - var contentStream = data[0]; - var partialEvaluator = new PartialEvaluator(pdfManager, self.xref, - handler, self.pageIndex, - 'p' + self.pageIndex + '_', - self.idCounters, - self.fontCache); - - return partialEvaluator.getTextContent(contentStream, - self.resources); - }); - }, - - getAnnotationsData: function Page_getAnnotationsData() { - var annotations = this.annotations; - var annotationsData = []; - for (var i = 0, n = annotations.length; i < n; ++i) { - annotationsData.push(annotations[i].getData()); - } - return annotationsData; - }, - - get annotations() { - var annotations = []; - var annotationRefs = (this.annotationRefs || []); - for (var i = 0, n = annotationRefs.length; i < n; ++i) { - var annotationRef = annotationRefs[i]; - var annotation = Annotation.fromRef(this.xref, annotationRef); - if (annotation) { - annotations.push(annotation); - } - } - return shadow(this, 'annotations', annotations); - } - }; - - return Page; -})(); - -/** - * The `PDFDocument` holds all the data of the PDF file. Compared to the - * `PDFDoc`, this one doesn't have any job management code. - * Right now there exists one PDFDocument on the main thread + one object - * for each worker. If there is no worker support enabled, there are two - * `PDFDocument` objects on the main thread created. - */ -var PDFDocument = (function PDFDocumentClosure() { - function PDFDocument(pdfManager, arg, password) { - if (isStream(arg)) { - init.call(this, pdfManager, arg, password); - } else if (isArrayBuffer(arg)) { - init.call(this, pdfManager, new Stream(arg), password); - } else { - error('PDFDocument: Unknown argument type'); - } - } - - function init(pdfManager, stream, password) { - assert(stream.length > 0, 'stream must have data'); - this.pdfManager = pdfManager; - this.stream = stream; - var xref = new XRef(this.stream, password, pdfManager); + this.stream = stream; + var xref = new XRef(this.stream, password, pdfManager); this.xref = xref; } @@ -17025,6 +16458,522 @@ var CIDToUnicodeMaps = { +var DEFAULT_ICON_SIZE = 22; // px +var SUPPORTED_TYPES = ['Link', 'Text', 'Widget']; + +var Annotation = (function AnnotationClosure() { + // 12.5.5: Algorithm: Appearance streams + function getTransformMatrix(rect, bbox, matrix) { + var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix); + var minX = bounds[0]; + var minY = bounds[1]; + var maxX = bounds[2]; + var maxY = bounds[3]; + + if (minX === maxX || minY === maxY) { + // From real-life file, bbox was [0, 0, 0, 0]. In this case, + // just apply the transform for rect + return [1, 0, 0, 1, rect[0], rect[1]]; + } + + var xRatio = (rect[2] - rect[0]) / (maxX - minX); + var yRatio = (rect[3] - rect[1]) / (maxY - minY); + return [ + xRatio, + 0, + 0, + yRatio, + rect[0] - minX * xRatio, + rect[1] - minY * yRatio + ]; + } + + function getDefaultAppearance(dict) { + var appearanceState = dict.get('AP'); + if (!isDict(appearanceState)) { + return; + } + + var appearance; + var appearances = appearanceState.get('N'); + if (isDict(appearances)) { + var as = dict.get('AS'); + if (as && appearances.has(as.name)) { + appearance = appearances.get(as.name); + } + } else { + appearance = appearances; + } + return appearance; + } + + function Annotation(params) { + var dict = params.dict; + var data = this.data = {}; + + data.subtype = dict.get('Subtype').name; + var rect = dict.get('Rect') || [0, 0, 0, 0]; + data.rect = Util.normalizeRect(rect); + data.annotationFlags = dict.get('F'); + + var color = dict.get('C'); + if (isArray(color) && color.length === 3) { + // TODO(mack): currently only supporting rgb; need support different + // colorspaces + data.color = color; + } else { + data.color = [0, 0, 0]; + } + + // Some types of annotations have border style dict which has more + // info than the border array + if (dict.has('BS')) { + var borderStyle = dict.get('BS'); + data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1; + } else { + var borderArray = dict.get('Border') || [0, 0, 1]; + data.borderWidth = borderArray[2] || 0; + + // TODO: implement proper support for annotations with line dash patterns. + var dashArray = borderArray[3]; + if (data.borderWidth > 0 && dashArray) { + if (!isArray(dashArray)) { + // Ignore the border if dashArray is not actually an array, + // this is consistent with the behaviour in Adobe Reader. + data.borderWidth = 0; + } else { + var dashArrayLength = dashArray.length; + if (dashArrayLength > 0) { + // According to the PDF specification: the elements in a dashArray + // shall be numbers that are nonnegative and not all equal to zero. + var isInvalid = false; + var numPositive = 0; + for (var i = 0; i < dashArrayLength; i++) { + var validNumber = (+dashArray[i] >= 0); + if (!validNumber) { + isInvalid = true; + break; + } else if (dashArray[i] > 0) { + numPositive++; + } + } + if (isInvalid || numPositive === 0) { + data.borderWidth = 0; + } + } + } + } + } + + this.appearance = getDefaultAppearance(dict); + data.hasAppearance = !!this.appearance; + data.id = params.ref.num; + } + + Annotation.prototype = { + + getData: function Annotation_getData() { + return this.data; + }, + + isInvisible: function Annotation_isInvisible() { + var data = this.data; + if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) { + return false; + } else { + return !!(data && + data.annotationFlags && // Default: not invisible + data.annotationFlags & 0x1); // Invisible + } + }, + + isViewable: function Annotation_isViewable() { + var data = this.data; + return !!(!this.isInvisible() && + data && + (!data.annotationFlags || + !(data.annotationFlags & 0x22)) && // Hidden or NoView + data.rect); // rectangle is necessary + }, + + isPrintable: function Annotation_isPrintable() { + var data = this.data; + return !!(!this.isInvisible() && + data && + data.annotationFlags && // Default: not printable + data.annotationFlags & 0x4 && // Print + !(data.annotationFlags & 0x2) && // Hidden + data.rect); // rectangle is necessary + }, + + loadResources: function Annotation_loadResources(keys) { + return new Promise(function (resolve, reject) { + this.appearance.dict.getAsync('Resources').then(function (resources) { + if (!resources) { + resolve(); + return; + } + var objectLoader = new ObjectLoader(resources.map, + keys, + resources.xref); + objectLoader.load().then(function() { + resolve(resources); + }, reject); + }, reject); + }.bind(this)); + }, + + getOperatorList: function Annotation_getOperatorList(evaluator) { + + if (!this.appearance) { + return Promise.resolve(new OperatorList()); + } + + var data = this.data; + + var appearanceDict = this.appearance.dict; + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'ColorSpace', + 'Pattern', + 'Shading', + 'XObject', + 'Font' + // ProcSet + // Properties + ]); + var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1]; + var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0]; + var transform = getTransformMatrix(data.rect, bbox, matrix); + var self = this; + + return resourcesPromise.then(function(resources) { + var opList = new OperatorList(); + opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]); + return evaluator.getOperatorList(self.appearance, resources, opList). + then(function () { + opList.addOp(OPS.endAnnotation, []); + self.appearance.reset(); + return opList; + }); + }); + } + }; + + Annotation.getConstructor = + function Annotation_getConstructor(subtype, fieldType) { + + if (!subtype) { + return; + } + + // TODO(mack): Implement FreeText annotations + if (subtype === 'Link') { + return LinkAnnotation; + } else if (subtype === 'Text') { + return TextAnnotation; + } else if (subtype === 'Widget') { + if (!fieldType) { + return; + } + + if (fieldType === 'Tx') { + return TextWidgetAnnotation; + } else { + return WidgetAnnotation; + } + } else { + return Annotation; + } + }; + + Annotation.fromRef = function Annotation_fromRef(xref, ref) { + + var dict = xref.fetchIfRef(ref); + if (!isDict(dict)) { + return; + } + + var subtype = dict.get('Subtype'); + subtype = isName(subtype) ? subtype.name : ''; + if (!subtype) { + return; + } + + var fieldType = Util.getInheritableProperty(dict, 'FT'); + fieldType = isName(fieldType) ? fieldType.name : ''; + + var Constructor = Annotation.getConstructor(subtype, fieldType); + if (!Constructor) { + return; + } + + var params = { + dict: dict, + ref: ref, + }; + + var annotation = new Constructor(params); + + if (annotation.isViewable() || annotation.isPrintable()) { + return annotation; + } else { + if (SUPPORTED_TYPES.indexOf(subtype) === -1) { + warn('unimplemented annotation type: ' + subtype); + } + } + }; + + Annotation.appendToOperatorList = function Annotation_appendToOperatorList( + annotations, opList, pdfManager, partialEvaluator, intent) { + + function reject(e) { + annotationsReadyCapability.reject(e); + } + + var annotationsReadyCapability = createPromiseCapability(); + + var annotationPromises = []; + for (var i = 0, n = annotations.length; i < n; ++i) { + if (intent === 'display' && annotations[i].isViewable() || + intent === 'print' && annotations[i].isPrintable()) { + annotationPromises.push( + annotations[i].getOperatorList(partialEvaluator)); + } + } + Promise.all(annotationPromises).then(function(datas) { + opList.addOp(OPS.beginAnnotations, []); + for (var i = 0, n = datas.length; i < n; ++i) { + var annotOpList = datas[i]; + opList.addOpList(annotOpList); + } + opList.addOp(OPS.endAnnotations, []); + annotationsReadyCapability.resolve(); + }, reject); + + return annotationsReadyCapability.promise; + }; + + return Annotation; +})(); +PDFJS.Annotation = Annotation; + + +var WidgetAnnotation = (function WidgetAnnotationClosure() { + + function WidgetAnnotation(params) { + Annotation.call(this, params); + + var dict = params.dict; + var data = this.data; + + data.fieldValue = stringToPDFString( + Util.getInheritableProperty(dict, 'V') || ''); + data.alternativeText = stringToPDFString(dict.get('TU') || ''); + data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || ''; + var fieldType = Util.getInheritableProperty(dict, 'FT'); + data.fieldType = isName(fieldType) ? fieldType.name : ''; + data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0; + this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty; + + // Building the full field name by collecting the field and + // its ancestors 'T' data and joining them using '.'. + var fieldName = []; + var namedItem = dict; + var ref = params.ref; + while (namedItem) { + var parent = namedItem.get('Parent'); + var parentRef = namedItem.getRaw('Parent'); + var name = namedItem.get('T'); + if (name) { + fieldName.unshift(stringToPDFString(name)); + } else { + // The field name is absent, that means more than one field + // with the same name may exist. Replacing the empty name + // with the '`' plus index in the parent's 'Kids' array. + // This is not in the PDF spec but necessary to id the + // the input controls. + var kids = parent.get('Kids'); + var j, jj; + for (j = 0, jj = kids.length; j < jj; j++) { + var kidRef = kids[j]; + if (kidRef.num == ref.num && kidRef.gen == ref.gen) { + break; + } + } + fieldName.unshift('`' + j); + } + namedItem = parent; + ref = parentRef; + } + data.fullName = fieldName.join('.'); + } + + var parent = Annotation.prototype; + Util.inherit(WidgetAnnotation, Annotation, { + isViewable: function WidgetAnnotation_isViewable() { + if (this.data.fieldType === 'Sig') { + warn('unimplemented annotation type: Widget signature'); + return false; + } + + return parent.isViewable.call(this); + } + }); + + return WidgetAnnotation; +})(); + +var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() { + function TextWidgetAnnotation(params) { + WidgetAnnotation.call(this, params); + + this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q'); + this.data.annotationType = AnnotationType.WIDGET; + this.data.hasHtml = !this.data.hasAppearance && !!this.data.fieldValue; + } + + Util.inherit(TextWidgetAnnotation, WidgetAnnotation, { + getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) { + if (this.appearance) { + return Annotation.prototype.getOperatorList.call(this, evaluator); + } + + var opList = new OperatorList(); + var data = this.data; + + // Even if there is an appearance stream, ignore it. This is the + // behaviour used by Adobe Reader. + if (!data.defaultAppearance) { + return Promise.resolve(opList); + } + + var stream = new Stream(stringToBytes(data.defaultAppearance)); + return evaluator.getOperatorList(stream, this.fieldResources, opList). + then(function () { + return opList; + }); + } + }); + + return TextWidgetAnnotation; +})(); + +var InteractiveAnnotation = (function InteractiveAnnotationClosure() { + function InteractiveAnnotation(params) { + Annotation.call(this, params); + + this.data.hasHtml = true; + } + + Util.inherit(InteractiveAnnotation, Annotation, { }); + + return InteractiveAnnotation; +})(); + +var TextAnnotation = (function TextAnnotationClosure() { + function TextAnnotation(params) { + InteractiveAnnotation.call(this, params); + + var dict = params.dict; + var data = this.data; + + var content = dict.get('Contents'); + var title = dict.get('T'); + data.annotationType = AnnotationType.TEXT; + data.content = stringToPDFString(content || ''); + data.title = stringToPDFString(title || ''); + + if (data.hasAppearance) { + data.name = 'NoIcon'; + } else { + data.rect[1] = data.rect[3] - DEFAULT_ICON_SIZE; + data.rect[2] = data.rect[0] + DEFAULT_ICON_SIZE; + data.name = dict.has('Name') ? dict.get('Name').name : 'Note'; + } + + if (dict.has('C')) { + data.hasBgColor = true; + } + } + + Util.inherit(TextAnnotation, InteractiveAnnotation, { }); + + return TextAnnotation; +})(); + +var LinkAnnotation = (function LinkAnnotationClosure() { + function LinkAnnotation(params) { + InteractiveAnnotation.call(this, params); + + var dict = params.dict; + var data = this.data; + data.annotationType = AnnotationType.LINK; + + var action = dict.get('A'); + if (action) { + var linkType = action.get('S').name; + if (linkType === 'URI') { + var url = action.get('URI'); + if (isName(url)) { + // Some bad PDFs do not put parentheses around relative URLs. + url = '/' + url.name; + } else if (url) { + url = addDefaultProtocolToUrl(url); + } + // TODO: pdf spec mentions urls can be relative to a Base + // entry in the dictionary. + if (!isValidUrl(url, false)) { + url = ''; + } + data.url = url; + } else if (linkType === 'GoTo') { + data.dest = action.get('D'); + } else if (linkType === 'GoToR') { + var urlDict = action.get('F'); + if (isDict(urlDict)) { + // We assume that the 'url' is a Filspec dictionary + // and fetch the url without checking any further + url = urlDict.get('F') || ''; + } + + // TODO: pdf reference says that GoToR + // can also have 'NewWindow' attribute + if (!isValidUrl(url, false)) { + url = ''; + } + data.url = url; + data.dest = action.get('D'); + } else if (linkType === 'Named') { + data.action = action.get('N').name; + } else { + warn('unrecognized link type: ' + linkType); + } + } else if (dict.has('Dest')) { + // simple destination link + var dest = dict.get('Dest'); + data.dest = isName(dest) ? dest.name : dest; + } + } + + // Lets URLs beginning with 'www.' default to using the 'http://' protocol. + function addDefaultProtocolToUrl(url) { + if (url && url.indexOf('www.') === 0) { + return ('http://' + url); + } + return url; + } + + Util.inherit(LinkAnnotation, InteractiveAnnotation, { + hasOperatorList: function LinkAnnotation_hasOperatorList() { + return false; + } + }); + + return LinkAnnotation; +})(); + + var PDFFunction = (function PDFFunctionClosure() { var CONSTRUCT_SAMPLED = 0; var CONSTRUCT_INTERPOLATED = 2; diff --git a/build/pdf.js b/build/pdf.js index 10d0032d4..0b178e791 100644 --- a/build/pdf.js +++ b/build/pdf.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { (typeof window !== 'undefined' ? window : this).PDFJS = {}; } -PDFJS.version = '1.0.391'; -PDFJS.build = '011eb84'; +PDFJS.version = '1.0.393'; +PDFJS.build = '2282c98'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -74,6 +74,12 @@ var ImageKind = { RGBA_32BPP: 3 }; +var AnnotationType = { + WIDGET: 1, + TEXT: 2, + LINK: 3 +}; + var StreamType = { UNKNOWN: 0, FLATE: 1, @@ -1582,813 +1588,6 @@ function loadJpegStream(id, imageUrl, objs) { } -var DEFAULT_ICON_SIZE = 22; // px -var HIGHLIGHT_OFFSET = 4; // px -var SUPPORTED_TYPES = ['Link', 'Text', 'Widget']; - -var Annotation = (function AnnotationClosure() { - // 12.5.5: Algorithm: Appearance streams - function getTransformMatrix(rect, bbox, matrix) { - var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix); - var minX = bounds[0]; - var minY = bounds[1]; - var maxX = bounds[2]; - var maxY = bounds[3]; - - if (minX === maxX || minY === maxY) { - // From real-life file, bbox was [0, 0, 0, 0]. In this case, - // just apply the transform for rect - return [1, 0, 0, 1, rect[0], rect[1]]; - } - - var xRatio = (rect[2] - rect[0]) / (maxX - minX); - var yRatio = (rect[3] - rect[1]) / (maxY - minY); - return [ - xRatio, - 0, - 0, - yRatio, - rect[0] - minX * xRatio, - rect[1] - minY * yRatio - ]; - } - - function getDefaultAppearance(dict) { - var appearanceState = dict.get('AP'); - if (!isDict(appearanceState)) { - return; - } - - var appearance; - var appearances = appearanceState.get('N'); - if (isDict(appearances)) { - var as = dict.get('AS'); - if (as && appearances.has(as.name)) { - appearance = appearances.get(as.name); - } - } else { - appearance = appearances; - } - return appearance; - } - - function Annotation(params) { - if (params.data) { - this.data = params.data; - return; - } - - var dict = params.dict; - var data = this.data = {}; - - data.subtype = dict.get('Subtype').name; - var rect = dict.get('Rect') || [0, 0, 0, 0]; - data.rect = Util.normalizeRect(rect); - data.annotationFlags = dict.get('F'); - - var color = dict.get('C'); - if (isArray(color) && color.length === 3) { - // TODO(mack): currently only supporting rgb; need support different - // colorspaces - data.color = color; - } else { - data.color = [0, 0, 0]; - } - - // Some types of annotations have border style dict which has more - // info than the border array - if (dict.has('BS')) { - var borderStyle = dict.get('BS'); - data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1; - } else { - var borderArray = dict.get('Border') || [0, 0, 1]; - data.borderWidth = borderArray[2] || 0; - - // TODO: implement proper support for annotations with line dash patterns. - var dashArray = borderArray[3]; - if (data.borderWidth > 0 && dashArray) { - if (!isArray(dashArray)) { - // Ignore the border if dashArray is not actually an array, - // this is consistent with the behaviour in Adobe Reader. - data.borderWidth = 0; - } else { - var dashArrayLength = dashArray.length; - if (dashArrayLength > 0) { - // According to the PDF specification: the elements in a dashArray - // shall be numbers that are nonnegative and not all equal to zero. - var isInvalid = false; - var numPositive = 0; - for (var i = 0; i < dashArrayLength; i++) { - var validNumber = (+dashArray[i] >= 0); - if (!validNumber) { - isInvalid = true; - break; - } else if (dashArray[i] > 0) { - numPositive++; - } - } - if (isInvalid || numPositive === 0) { - data.borderWidth = 0; - } - } - } - } - } - - this.appearance = getDefaultAppearance(dict); - data.hasAppearance = !!this.appearance; - data.id = params.ref.num; - } - - Annotation.prototype = { - - getData: function Annotation_getData() { - return this.data; - }, - - hasHtml: function Annotation_hasHtml() { - return false; - }, - - getHtmlElement: function Annotation_getHtmlElement(commonObjs) { - throw new NotImplementedException( - 'getHtmlElement() should be implemented in subclass'); - }, - - // TODO(mack): Remove this, it's not really that helpful. - getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect, - borderWidth) { - assert(!isWorker, - 'getEmptyContainer() should be called from main thread'); - - var bWidth = borderWidth || 0; - - rect = rect || this.data.rect; - var element = document.createElement(tagName); - element.style.borderWidth = bWidth + 'px'; - var width = rect[2] - rect[0] - 2 * bWidth; - var height = rect[3] - rect[1] - 2 * bWidth; - element.style.width = width + 'px'; - element.style.height = height + 'px'; - return element; - }, - - isInvisible: function Annotation_isInvisible() { - var data = this.data; - if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) { - return false; - } else { - return !!(data && - data.annotationFlags && // Default: not invisible - data.annotationFlags & 0x1); // Invisible - } - }, - - isViewable: function Annotation_isViewable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - (!data.annotationFlags || - !(data.annotationFlags & 0x22)) && // Hidden or NoView - data.rect); // rectangle is necessary - }, - - isPrintable: function Annotation_isPrintable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - data.annotationFlags && // Default: not printable - data.annotationFlags & 0x4 && // Print - !(data.annotationFlags & 0x2) && // Hidden - data.rect); // rectangle is necessary - }, - - loadResources: function Annotation_loadResources(keys) { - return new Promise(function (resolve, reject) { - this.appearance.dict.getAsync('Resources').then(function (resources) { - if (!resources) { - resolve(); - return; - } - var objectLoader = new ObjectLoader(resources.map, - keys, - resources.xref); - objectLoader.load().then(function() { - resolve(resources); - }, reject); - }, reject); - }.bind(this)); - }, - - getOperatorList: function Annotation_getOperatorList(evaluator) { - - if (!this.appearance) { - return Promise.resolve(new OperatorList()); - } - - var data = this.data; - - var appearanceDict = this.appearance.dict; - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'ColorSpace', - 'Pattern', - 'Shading', - 'XObject', - 'Font' - // ProcSet - // Properties - ]); - var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1]; - var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0]; - var transform = getTransformMatrix(data.rect, bbox, matrix); - var self = this; - - return resourcesPromise.then(function(resources) { - var opList = new OperatorList(); - opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]); - return evaluator.getOperatorList(self.appearance, resources, opList). - then(function () { - opList.addOp(OPS.endAnnotation, []); - self.appearance.reset(); - return opList; - }); - }); - } - }; - - Annotation.getConstructor = - function Annotation_getConstructor(subtype, fieldType) { - - if (!subtype) { - return; - } - - // TODO(mack): Implement FreeText annotations - if (subtype === 'Link') { - return LinkAnnotation; - } else if (subtype === 'Text') { - return TextAnnotation; - } else if (subtype === 'Widget') { - if (!fieldType) { - return; - } - - if (fieldType === 'Tx') { - return TextWidgetAnnotation; - } else { - return WidgetAnnotation; - } - } else { - return Annotation; - } - }; - - // TODO(mack): Support loading annotation from data - Annotation.fromData = function Annotation_fromData(data) { - var subtype = data.subtype; - var fieldType = data.fieldType; - var Constructor = Annotation.getConstructor(subtype, fieldType); - if (Constructor) { - return new Constructor({ data: data }); - } - }; - - Annotation.fromRef = function Annotation_fromRef(xref, ref) { - - var dict = xref.fetchIfRef(ref); - if (!isDict(dict)) { - return; - } - - var subtype = dict.get('Subtype'); - subtype = isName(subtype) ? subtype.name : ''; - if (!subtype) { - return; - } - - var fieldType = Util.getInheritableProperty(dict, 'FT'); - fieldType = isName(fieldType) ? fieldType.name : ''; - - var Constructor = Annotation.getConstructor(subtype, fieldType); - if (!Constructor) { - return; - } - - var params = { - dict: dict, - ref: ref, - }; - - var annotation = new Constructor(params); - - if (annotation.isViewable() || annotation.isPrintable()) { - return annotation; - } else { - if (SUPPORTED_TYPES.indexOf(subtype) === -1) { - warn('unimplemented annotation type: ' + subtype); - } - } - }; - - Annotation.appendToOperatorList = function Annotation_appendToOperatorList( - annotations, opList, pdfManager, partialEvaluator, intent) { - - function reject(e) { - annotationsReadyCapability.reject(e); - } - - var annotationsReadyCapability = createPromiseCapability(); - - var annotationPromises = []; - for (var i = 0, n = annotations.length; i < n; ++i) { - if (intent === 'display' && annotations[i].isViewable() || - intent === 'print' && annotations[i].isPrintable()) { - annotationPromises.push( - annotations[i].getOperatorList(partialEvaluator)); - } - } - Promise.all(annotationPromises).then(function(datas) { - opList.addOp(OPS.beginAnnotations, []); - for (var i = 0, n = datas.length; i < n; ++i) { - var annotOpList = datas[i]; - opList.addOpList(annotOpList); - } - opList.addOp(OPS.endAnnotations, []); - annotationsReadyCapability.resolve(); - }, reject); - - return annotationsReadyCapability.promise; - }; - - return Annotation; -})(); -PDFJS.Annotation = Annotation; - - -var WidgetAnnotation = (function WidgetAnnotationClosure() { - - function WidgetAnnotation(params) { - Annotation.call(this, params); - - if (params.data) { - return; - } - - var dict = params.dict; - var data = this.data; - - data.fieldValue = stringToPDFString( - Util.getInheritableProperty(dict, 'V') || ''); - data.alternativeText = stringToPDFString(dict.get('TU') || ''); - data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || ''; - var fieldType = Util.getInheritableProperty(dict, 'FT'); - data.fieldType = isName(fieldType) ? fieldType.name : ''; - data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0; - this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty; - - // Building the full field name by collecting the field and - // its ancestors 'T' data and joining them using '.'. - var fieldName = []; - var namedItem = dict; - var ref = params.ref; - while (namedItem) { - var parent = namedItem.get('Parent'); - var parentRef = namedItem.getRaw('Parent'); - var name = namedItem.get('T'); - if (name) { - fieldName.unshift(stringToPDFString(name)); - } else { - // The field name is absent, that means more than one field - // with the same name may exist. Replacing the empty name - // with the '`' plus index in the parent's 'Kids' array. - // This is not in the PDF spec but necessary to id the - // the input controls. - var kids = parent.get('Kids'); - var j, jj; - for (j = 0, jj = kids.length; j < jj; j++) { - var kidRef = kids[j]; - if (kidRef.num == ref.num && kidRef.gen == ref.gen) { - break; - } - } - fieldName.unshift('`' + j); - } - namedItem = parent; - ref = parentRef; - } - data.fullName = fieldName.join('.'); - } - - var parent = Annotation.prototype; - Util.inherit(WidgetAnnotation, Annotation, { - isViewable: function WidgetAnnotation_isViewable() { - if (this.data.fieldType === 'Sig') { - warn('unimplemented annotation type: Widget signature'); - return false; - } - - return parent.isViewable.call(this); - } - }); - - return WidgetAnnotation; -})(); - -var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() { - function TextWidgetAnnotation(params) { - WidgetAnnotation.call(this, params); - - if (params.data) { - return; - } - - this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q'); - } - - // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont() - function setTextStyles(element, item, fontObj) { - - var style = element.style; - style.fontSize = item.fontSize + 'px'; - style.direction = item.fontDirection < 0 ? 'rtl': 'ltr'; - - if (!fontObj) { - return; - } - - style.fontWeight = fontObj.black ? - (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - style.fontStyle = fontObj.italic ? 'italic' : 'normal'; - - var fontName = fontObj.loadedName; - var fontFamily = fontName ? '"' + fontName + '", ' : ''; - // Use a reasonable default font if the font doesn't specify a fallback - var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif'; - style.fontFamily = fontFamily + fallbackName; - } - - - Util.inherit(TextWidgetAnnotation, WidgetAnnotation, { - hasHtml: function TextWidgetAnnotation_hasHtml() { - return !this.data.hasAppearance && !!this.data.fieldValue; - }, - - getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); - - var item = this.data; - - var element = this.getEmptyContainer('div'); - element.style.display = 'table'; - - var content = document.createElement('div'); - content.textContent = item.fieldValue; - var textAlignment = item.textAlignment; - content.style.textAlign = ['left', 'center', 'right'][textAlignment]; - content.style.verticalAlign = 'middle'; - content.style.display = 'table-cell'; - - var fontObj = item.fontRefName ? - commonObjs.getData(item.fontRefName) : null; - setTextStyles(content, item, fontObj); - - element.appendChild(content); - - return element; - }, - - getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) { - if (this.appearance) { - return Annotation.prototype.getOperatorList.call(this, evaluator); - } - - var opList = new OperatorList(); - var data = this.data; - - // Even if there is an appearance stream, ignore it. This is the - // behaviour used by Adobe Reader. - if (!data.defaultAppearance) { - return Promise.resolve(opList); - } - - var stream = new Stream(stringToBytes(data.defaultAppearance)); - return evaluator.getOperatorList(stream, this.fieldResources, opList). - then(function () { - return opList; - }); - } - }); - - return TextWidgetAnnotation; -})(); - -var InteractiveAnnotation = (function InteractiveAnnotationClosure() { - function InteractiveAnnotation(params) { - Annotation.call(this, params); - } - - Util.inherit(InteractiveAnnotation, Annotation, { - hasHtml: function InteractiveAnnotation_hasHtml() { - return true; - }, - - highlight: function InteractiveAnnotation_highlight() { - if (this.highlightElement && - this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.removeAttribute('hidden'); - } - }, - - unhighlight: function InteractiveAnnotation_unhighlight() { - if (this.highlightElement && - !this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.setAttribute('hidden', true); - } - }, - - initContainer: function InteractiveAnnotation_initContainer() { - - var item = this.data; - var rect = item.rect; - - var container = this.getEmptyContainer('section', rect, item.borderWidth); - container.style.backgroundColor = item.color; - - var color = item.color; - var rgb = []; - for (var i = 0; i < 3; ++i) { - rgb[i] = Math.round(color[i] * 255); - } - item.colorCssRgb = Util.makeCssRgb(rgb); - - var highlight = document.createElement('div'); - highlight.className = 'annotationHighlight'; - highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px'; - highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px'; - highlight.setAttribute('hidden', true); - - this.highlightElement = highlight; - container.appendChild(this.highlightElement); - - return container; - } - }); - - return InteractiveAnnotation; -})(); - -var TextAnnotation = (function TextAnnotationClosure() { - function TextAnnotation(params) { - InteractiveAnnotation.call(this, params); - - if (params.data) { - return; - } - - var dict = params.dict; - var data = this.data; - - var content = dict.get('Contents'); - var title = dict.get('T'); - data.content = stringToPDFString(content || ''); - data.title = stringToPDFString(title || ''); - - if (data.hasAppearance) { - data.name = 'NoIcon'; - } else { - data.rect[1] = data.rect[3] - DEFAULT_ICON_SIZE; - data.rect[2] = data.rect[0] + DEFAULT_ICON_SIZE; - data.name = dict.has('Name') ? dict.get('Name').name : 'Note'; - } - - if (dict.has('C')) { - data.hasBgColor = true; - } - } - - var ANNOT_MIN_SIZE = 10; - - Util.inherit(TextAnnotation, InteractiveAnnotation, { - - getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); - - var item = this.data; - var rect = item.rect; - - // sanity check because of OOo-generated PDFs - if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) { - rect[3] = rect[1] + ANNOT_MIN_SIZE; - } - if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) { - rect[2] = rect[0] + (rect[3] - rect[1]); // make it square - } - - var container = this.initContainer(); - container.className = 'annotText'; - - var image = document.createElement('img'); - image.style.height = container.style.height; - image.style.width = container.style.width; - var iconName = item.name; - image.src = PDFJS.imageResourcesPath + 'annotation-' + - iconName.toLowerCase() + '.svg'; - image.alt = '[{{type}} Annotation]'; - image.dataset.l10nId = 'text_annotation_type'; - image.dataset.l10nArgs = JSON.stringify({type: iconName}); - - var contentWrapper = document.createElement('div'); - contentWrapper.className = 'annotTextContentWrapper'; - contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px'; - contentWrapper.style.top = '-10px'; - - var content = document.createElement('div'); - content.className = 'annotTextContent'; - content.setAttribute('hidden', true); - - var i, ii; - if (item.hasBgColor) { - var color = item.color; - var rgb = []; - for (i = 0; i < 3; ++i) { - // Enlighten the color (70%) - var c = Math.round(color[i] * 255); - rgb[i] = Math.round((255 - c) * 0.7) + c; - } - content.style.backgroundColor = Util.makeCssRgb(rgb); - } - - var title = document.createElement('h1'); - var text = document.createElement('p'); - title.textContent = item.title; - - if (!item.content && !item.title) { - content.setAttribute('hidden', true); - } else { - var e = document.createElement('span'); - var lines = item.content.split(/(?:\r\n?|\n)/); - for (i = 0, ii = lines.length; i < ii; ++i) { - var line = lines[i]; - e.appendChild(document.createTextNode(line)); - if (i < (ii - 1)) { - e.appendChild(document.createElement('br')); - } - } - text.appendChild(e); - - var pinned = false; - - var showAnnotation = function showAnnotation(pin) { - if (pin) { - pinned = true; - } - if (content.hasAttribute('hidden')) { - container.style.zIndex += 1; - content.removeAttribute('hidden'); - } - }; - - var hideAnnotation = function hideAnnotation(unpin) { - if (unpin) { - pinned = false; - } - if (!content.hasAttribute('hidden') && !pinned) { - container.style.zIndex -= 1; - content.setAttribute('hidden', true); - } - }; - - var toggleAnnotation = function toggleAnnotation() { - if (pinned) { - hideAnnotation(true); - } else { - showAnnotation(true); - } - }; - - image.addEventListener('click', function image_clickHandler() { - toggleAnnotation(); - }, false); - image.addEventListener('mouseover', function image_mouseOverHandler() { - showAnnotation(); - }, false); - image.addEventListener('mouseout', function image_mouseOutHandler() { - hideAnnotation(); - }, false); - - content.addEventListener('click', function content_clickHandler() { - hideAnnotation(true); - }, false); - } - - content.appendChild(title); - content.appendChild(text); - contentWrapper.appendChild(content); - container.appendChild(image); - container.appendChild(contentWrapper); - - return container; - } - }); - - return TextAnnotation; -})(); - -var LinkAnnotation = (function LinkAnnotationClosure() { - function LinkAnnotation(params) { - InteractiveAnnotation.call(this, params); - - if (params.data) { - return; - } - - var dict = params.dict; - var data = this.data; - - var action = dict.get('A'); - if (action) { - var linkType = action.get('S').name; - if (linkType === 'URI') { - var url = action.get('URI'); - if (isName(url)) { - // Some bad PDFs do not put parentheses around relative URLs. - url = '/' + url.name; - } else if (url) { - url = addDefaultProtocolToUrl(url); - } - // TODO: pdf spec mentions urls can be relative to a Base - // entry in the dictionary. - if (!isValidUrl(url, false)) { - url = ''; - } - data.url = url; - } else if (linkType === 'GoTo') { - data.dest = action.get('D'); - } else if (linkType === 'GoToR') { - var urlDict = action.get('F'); - if (isDict(urlDict)) { - // We assume that the 'url' is a Filspec dictionary - // and fetch the url without checking any further - url = urlDict.get('F') || ''; - } - - // TODO: pdf reference says that GoToR - // can also have 'NewWindow' attribute - if (!isValidUrl(url, false)) { - url = ''; - } - data.url = url; - data.dest = action.get('D'); - } else if (linkType === 'Named') { - data.action = action.get('N').name; - } else { - warn('unrecognized link type: ' + linkType); - } - } else if (dict.has('Dest')) { - // simple destination link - var dest = dict.get('Dest'); - data.dest = isName(dest) ? dest.name : dest; - } - } - - // Lets URLs beginning with 'www.' default to using the 'http://' protocol. - function addDefaultProtocolToUrl(url) { - if (url && url.indexOf('www.') === 0) { - return ('http://' + url); - } - return url; - } - - Util.inherit(LinkAnnotation, InteractiveAnnotation, { - hasOperatorList: function LinkAnnotation_hasOperatorList() { - return false; - }, - - getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) { - - var container = this.initContainer(); - container.className = 'annotLink'; - - var item = this.data; - - container.style.borderColor = item.colorCssRgb; - container.style.borderStyle = 'solid'; - - var link = document.createElement('a'); - link.href = link.title = this.data.url || ''; - - container.appendChild(link); - - return container; - } - }); - - return LinkAnnotation; -})(); - - /** * 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. @@ -7034,6 +6233,240 @@ var FontFace = (function FontFaceClosure() { })(); +var HIGHLIGHT_OFFSET = 4; // px +var ANNOT_MIN_SIZE = 10; // px + +var AnnotationUtils = (function AnnotationUtilsClosure() { + // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont() + function setTextStyles(element, item, fontObj) { + + var style = element.style; + style.fontSize = item.fontSize + 'px'; + style.direction = item.fontDirection < 0 ? 'rtl': 'ltr'; + + if (!fontObj) { + return; + } + + style.fontWeight = fontObj.black ? + (fontObj.bold ? 'bolder' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); + style.fontStyle = fontObj.italic ? 'italic' : 'normal'; + + var fontName = fontObj.loadedName; + var fontFamily = fontName ? '"' + fontName + '", ' : ''; + // Use a reasonable default font if the font doesn't specify a fallback + var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif'; + style.fontFamily = fontFamily + fallbackName; + } + + // TODO(mack): Remove this, it's not really that helpful. + function getEmptyContainer(tagName, rect, borderWidth) { + var bWidth = borderWidth || 0; + var element = document.createElement(tagName); + element.style.borderWidth = bWidth + 'px'; + var width = rect[2] - rect[0] - 2 * bWidth; + var height = rect[3] - rect[1] - 2 * bWidth; + element.style.width = width + 'px'; + element.style.height = height + 'px'; + return element; + } + + function initContainer(item) { + var container = getEmptyContainer('section', item.rect, item.borderWidth); + container.style.backgroundColor = item.color; + + var color = item.color; + var rgb = []; + for (var i = 0; i < 3; ++i) { + rgb[i] = Math.round(color[i] * 255); + } + item.colorCssRgb = Util.makeCssRgb(rgb); + + var highlight = document.createElement('div'); + highlight.className = 'annotationHighlight'; + highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px'; + highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px'; + highlight.setAttribute('hidden', true); + + item.highlightElement = highlight; + container.appendChild(item.highlightElement); + + return container; + } + + function getHtmlElementForTextWidgetAnnotation(item, commonObjs) { + var element = getEmptyContainer('div', item.rect, 0); + element.style.display = 'table'; + + var content = document.createElement('div'); + content.textContent = item.fieldValue; + var textAlignment = item.textAlignment; + content.style.textAlign = ['left', 'center', 'right'][textAlignment]; + content.style.verticalAlign = 'middle'; + content.style.display = 'table-cell'; + + var fontObj = item.fontRefName ? + commonObjs.getData(item.fontRefName) : null; + setTextStyles(content, item, fontObj); + + element.appendChild(content); + + return element; + } + + function getHtmlElementForTextAnnotation(item, commonObjs) { + var rect = item.rect; + + // sanity check because of OOo-generated PDFs + if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) { + rect[3] = rect[1] + ANNOT_MIN_SIZE; + } + if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) { + rect[2] = rect[0] + (rect[3] - rect[1]); // make it square + } + + var container = initContainer(item); + container.className = 'annotText'; + + var image = document.createElement('img'); + image.style.height = container.style.height; + image.style.width = container.style.width; + var iconName = item.name; + image.src = PDFJS.imageResourcesPath + 'annotation-' + + iconName.toLowerCase() + '.svg'; + image.alt = '[{{type}} Annotation]'; + image.dataset.l10nId = 'text_annotation_type'; + image.dataset.l10nArgs = JSON.stringify({type: iconName}); + + var contentWrapper = document.createElement('div'); + contentWrapper.className = 'annotTextContentWrapper'; + contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px'; + contentWrapper.style.top = '-10px'; + + var content = document.createElement('div'); + content.className = 'annotTextContent'; + content.setAttribute('hidden', true); + + var i, ii; + if (item.hasBgColor) { + var color = item.color; + var rgb = []; + for (i = 0; i < 3; ++i) { + // Enlighten the color (70%) + var c = Math.round(color[i] * 255); + rgb[i] = Math.round((255 - c) * 0.7) + c; + } + content.style.backgroundColor = Util.makeCssRgb(rgb); + } + + var title = document.createElement('h1'); + var text = document.createElement('p'); + title.textContent = item.title; + + if (!item.content && !item.title) { + content.setAttribute('hidden', true); + } else { + var e = document.createElement('span'); + var lines = item.content.split(/(?:\r\n?|\n)/); + for (i = 0, ii = lines.length; i < ii; ++i) { + var line = lines[i]; + e.appendChild(document.createTextNode(line)); + if (i < (ii - 1)) { + e.appendChild(document.createElement('br')); + } + } + text.appendChild(e); + + var pinned = false; + + var showAnnotation = function showAnnotation(pin) { + if (pin) { + pinned = true; + } + if (content.hasAttribute('hidden')) { + container.style.zIndex += 1; + content.removeAttribute('hidden'); + } + }; + + var hideAnnotation = function hideAnnotation(unpin) { + if (unpin) { + pinned = false; + } + if (!content.hasAttribute('hidden') && !pinned) { + container.style.zIndex -= 1; + content.setAttribute('hidden', true); + } + }; + + var toggleAnnotation = function toggleAnnotation() { + if (pinned) { + hideAnnotation(true); + } else { + showAnnotation(true); + } + }; + + image.addEventListener('click', function image_clickHandler() { + toggleAnnotation(); + }, false); + image.addEventListener('mouseover', function image_mouseOverHandler() { + showAnnotation(); + }, false); + image.addEventListener('mouseout', function image_mouseOutHandler() { + hideAnnotation(); + }, false); + + content.addEventListener('click', function content_clickHandler() { + hideAnnotation(true); + }, false); + } + + content.appendChild(title); + content.appendChild(text); + contentWrapper.appendChild(content); + container.appendChild(image); + container.appendChild(contentWrapper); + + return container; + } + + function getHtmlElementForLinkAnnotation(item, commonObjs) { + + var container = initContainer(item); + container.className = 'annotLink'; + + container.style.borderColor = item.colorCssRgb; + container.style.borderStyle = 'solid'; + + var link = document.createElement('a'); + link.href = link.title = item.url || ''; + + container.appendChild(link); + + return container; + } + + function getHtmlElement(data, objs) { + switch (data.annotationType) { + case AnnotationType.WIDGET: + return getHtmlElementForTextWidgetAnnotation(data, objs); + case AnnotationType.TEXT: + return getHtmlElementForTextAnnotation(data, objs); + case AnnotationType.LINK: + return getHtmlElementForLinkAnnotation(data, objs); + default: + throw new Error('Unsupported annotationType: ' + data.annotationType); + } + } + + return { + getHtmlElement: getHtmlElement + }; +})(); + + }).call((typeof window === 'undefined') ? this : window); if (!PDFJS.workerSrc && typeof document !== 'undefined') { diff --git a/build/pdf.worker.js b/build/pdf.worker.js index 88025736b..a576ca528 100644 --- a/build/pdf.worker.js +++ b/build/pdf.worker.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { (typeof window !== 'undefined' ? window : this).PDFJS = {}; } -PDFJS.version = '1.0.391'; -PDFJS.build = '011eb84'; +PDFJS.version = '1.0.393'; +PDFJS.build = '2282c98'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -74,6 +74,12 @@ var ImageKind = { RGBA_32BPP: 3 }; +var AnnotationType = { + WIDGET: 1, + TEXT: 2, + LINK: 3 +}; + var StreamType = { UNKNOWN: 0, FLATE: 1, @@ -1582,3914 +1588,3107 @@ function loadJpegStream(id, imageUrl, objs) { } -var DEFAULT_ICON_SIZE = 22; // px -var HIGHLIGHT_OFFSET = 4; // px -var SUPPORTED_TYPES = ['Link', 'Text', 'Widget']; -var Annotation = (function AnnotationClosure() { - // 12.5.5: Algorithm: Appearance streams - function getTransformMatrix(rect, bbox, matrix) { - var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix); - var minX = bounds[0]; - var minY = bounds[1]; - var maxX = bounds[2]; - var maxY = bounds[3]; - if (minX === maxX || minY === maxY) { - // From real-life file, bbox was [0, 0, 0, 0]. In this case, - // just apply the transform for rect - return [1, 0, 0, 1, rect[0], rect[1]]; - } +var NetworkManager = (function NetworkManagerClosure() { - var xRatio = (rect[2] - rect[0]) / (maxX - minX); - var yRatio = (rect[3] - rect[1]) / (maxY - minY); - return [ - xRatio, - 0, - 0, - yRatio, - rect[0] - minX * xRatio, - rect[1] - minY * yRatio - ]; + var OK_RESPONSE = 200; + var PARTIAL_CONTENT_RESPONSE = 206; + + function NetworkManager(url, args) { + this.url = url; + args = args || {}; + this.isHttp = /^https?:/i.test(url); + this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; + this.withCredentials = args.withCredentials || false; + this.getXhr = args.getXhr || + function NetworkManager_getXhr() { + return new XMLHttpRequest(); + }; + + this.currXhrId = 0; + this.pendingRequests = {}; + this.loadedRequests = {}; } - function getDefaultAppearance(dict) { - var appearanceState = dict.get('AP'); - if (!isDict(appearanceState)) { - return; + function getArrayBuffer(xhr) { + var data = xhr.response; + if (typeof data !== 'string') { + return data; } - - var appearance; - var appearances = appearanceState.get('N'); - if (isDict(appearances)) { - var as = dict.get('AS'); - if (as && appearances.has(as.name)) { - appearance = appearances.get(as.name); - } - } else { - appearance = appearances; + var length = data.length; + var buffer = new Uint8Array(length); + for (var i = 0; i < length; i++) { + buffer[i] = data.charCodeAt(i) & 0xFF; } - return appearance; + return buffer; } - function Annotation(params) { - if (params.data) { - this.data = params.data; - return; - } + NetworkManager.prototype = { + requestRange: function NetworkManager_requestRange(begin, end, listeners) { + var args = { + begin: begin, + end: end + }; + for (var prop in listeners) { + args[prop] = listeners[prop]; + } + return this.request(args); + }, - var dict = params.dict; - var data = this.data = {}; + requestFull: function NetworkManager_requestRange(listeners) { + return this.request(listeners); + }, - data.subtype = dict.get('Subtype').name; - var rect = dict.get('Rect') || [0, 0, 0, 0]; - data.rect = Util.normalizeRect(rect); - data.annotationFlags = dict.get('F'); + request: function NetworkManager_requestRange(args) { + var xhr = this.getXhr(); + var xhrId = this.currXhrId++; + var pendingRequest = this.pendingRequests[xhrId] = { + xhr: xhr + }; - var color = dict.get('C'); - if (isArray(color) && color.length === 3) { - // TODO(mack): currently only supporting rgb; need support different - // colorspaces - data.color = color; - } else { - data.color = [0, 0, 0]; - } + xhr.open('GET', this.url); + xhr.withCredentials = this.withCredentials; + for (var property in this.httpHeaders) { + var value = this.httpHeaders[property]; + if (typeof value === 'undefined') { + continue; + } + xhr.setRequestHeader(property, value); + } + if (this.isHttp && 'begin' in args && 'end' in args) { + var rangeStr = args.begin + '-' + (args.end - 1); + xhr.setRequestHeader('Range', 'bytes=' + rangeStr); + pendingRequest.expectedStatus = 206; + } else { + pendingRequest.expectedStatus = 200; + } - // Some types of annotations have border style dict which has more - // info than the border array - if (dict.has('BS')) { - var borderStyle = dict.get('BS'); - data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1; - } else { - var borderArray = dict.get('Border') || [0, 0, 1]; - data.borderWidth = borderArray[2] || 0; + xhr.responseType = 'arraybuffer'; - // TODO: implement proper support for annotations with line dash patterns. - var dashArray = borderArray[3]; - if (data.borderWidth > 0 && dashArray) { - if (!isArray(dashArray)) { - // Ignore the border if dashArray is not actually an array, - // this is consistent with the behaviour in Adobe Reader. - data.borderWidth = 0; - } else { - var dashArrayLength = dashArray.length; - if (dashArrayLength > 0) { - // According to the PDF specification: the elements in a dashArray - // shall be numbers that are nonnegative and not all equal to zero. - var isInvalid = false; - var numPositive = 0; - for (var i = 0; i < dashArrayLength; i++) { - var validNumber = (+dashArray[i] >= 0); - if (!validNumber) { - isInvalid = true; - break; - } else if (dashArray[i] > 0) { - numPositive++; - } - } - if (isInvalid || numPositive === 0) { - data.borderWidth = 0; - } - } - } + if (args.onProgress) { + xhr.onprogress = args.onProgress; } - } + if (args.onError) { + xhr.onerror = function(evt) { + args.onError(xhr.status); + }; + } + xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); - this.appearance = getDefaultAppearance(dict); - data.hasAppearance = !!this.appearance; - data.id = params.ref.num; - } + pendingRequest.onHeadersReceived = args.onHeadersReceived; + pendingRequest.onDone = args.onDone; + pendingRequest.onError = args.onError; - Annotation.prototype = { + xhr.send(null); - getData: function Annotation_getData() { - return this.data; + return xhrId; }, - hasHtml: function Annotation_hasHtml() { - return false; - }, + onStateChange: function NetworkManager_onStateChange(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } - getHtmlElement: function Annotation_getHtmlElement(commonObjs) { - throw new NotImplementedException( - 'getHtmlElement() should be implemented in subclass'); - }, + var xhr = pendingRequest.xhr; + if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { + pendingRequest.onHeadersReceived(); + delete pendingRequest.onHeadersReceived; + } - // TODO(mack): Remove this, it's not really that helpful. - getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect, - borderWidth) { - assert(!isWorker, - 'getEmptyContainer() should be called from main thread'); + if (xhr.readyState !== 4) { + return; + } - var bWidth = borderWidth || 0; + if (!(xhrId in this.pendingRequests)) { + // The XHR request might have been aborted in onHeadersReceived() + // callback, in which case we should abort request + return; + } - rect = rect || this.data.rect; - var element = document.createElement(tagName); - element.style.borderWidth = bWidth + 'px'; - var width = rect[2] - rect[0] - 2 * bWidth; - var height = rect[3] - rect[1] - 2 * bWidth; - element.style.width = width + 'px'; - element.style.height = height + 'px'; - return element; - }, + delete this.pendingRequests[xhrId]; - isInvisible: function Annotation_isInvisible() { - var data = this.data; - if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) { - return false; - } else { - return !!(data && - data.annotationFlags && // Default: not invisible - data.annotationFlags & 0x1); // Invisible + // success status == 0 can be on ftp, file and other protocols + if (xhr.status === 0 && this.isHttp) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; } - }, + var xhrStatus = xhr.status || OK_RESPONSE; - isViewable: function Annotation_isViewable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - (!data.annotationFlags || - !(data.annotationFlags & 0x22)) && // Hidden or NoView - data.rect); // rectangle is necessary - }, + // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: + // "A server MAY ignore the Range header". This means it's possible to + // get a 200 rather than a 206 response from a range request. + var ok_response_on_range_request = + xhrStatus === OK_RESPONSE && + pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; - isPrintable: function Annotation_isPrintable() { - var data = this.data; - return !!(!this.isInvisible() && - data && - data.annotationFlags && // Default: not printable - data.annotationFlags & 0x4 && // Print - !(data.annotationFlags & 0x2) && // Hidden - data.rect); // rectangle is necessary - }, + if (!ok_response_on_range_request && + xhrStatus !== pendingRequest.expectedStatus) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } - loadResources: function Annotation_loadResources(keys) { - return new Promise(function (resolve, reject) { - this.appearance.dict.getAsync('Resources').then(function (resources) { - if (!resources) { - resolve(); - return; - } - var objectLoader = new ObjectLoader(resources.map, - keys, - resources.xref); - objectLoader.load().then(function() { - resolve(resources); - }, reject); - }, reject); - }.bind(this)); - }, - - getOperatorList: function Annotation_getOperatorList(evaluator) { + this.loadedRequests[xhrId] = true; - if (!this.appearance) { - return Promise.resolve(new OperatorList()); + var chunk = getArrayBuffer(xhr); + if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { + var rangeHeader = xhr.getResponseHeader('Content-Range'); + var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); + var begin = parseInt(matches[1], 10); + pendingRequest.onDone({ + begin: begin, + chunk: chunk + }); + } else { + pendingRequest.onDone({ + begin: 0, + chunk: chunk + }); } + }, - var data = this.data; - - var appearanceDict = this.appearance.dict; - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'ColorSpace', - 'Pattern', - 'Shading', - 'XObject', - 'Font' - // ProcSet - // Properties - ]); - var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1]; - var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0]; - var transform = getTransformMatrix(data.rect, bbox, matrix); - var self = this; - - return resourcesPromise.then(function(resources) { - var opList = new OperatorList(); - opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]); - return evaluator.getOperatorList(self.appearance, resources, opList). - then(function () { - opList.addOp(OPS.endAnnotation, []); - self.appearance.reset(); - return opList; - }); - }); - } - }; + hasPendingRequests: function NetworkManager_hasPendingRequests() { + for (var xhrId in this.pendingRequests) { + return true; + } + return false; + }, - Annotation.getConstructor = - function Annotation_getConstructor(subtype, fieldType) { + getRequestXhr: function NetworkManager_getXhr(xhrId) { + return this.pendingRequests[xhrId].xhr; + }, - if (!subtype) { - return; - } + isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { + return xhrId in this.pendingRequests; + }, - // TODO(mack): Implement FreeText annotations - if (subtype === 'Link') { - return LinkAnnotation; - } else if (subtype === 'Text') { - return TextAnnotation; - } else if (subtype === 'Widget') { - if (!fieldType) { - return; - } + isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { + return xhrId in this.loadedRequests; + }, - if (fieldType === 'Tx') { - return TextWidgetAnnotation; - } else { - return WidgetAnnotation; + abortAllRequests: function NetworkManager_abortAllRequests() { + for (var xhrId in this.pendingRequests) { + this.abortRequest(xhrId | 0); } - } else { - return Annotation; - } - }; + }, - // TODO(mack): Support loading annotation from data - Annotation.fromData = function Annotation_fromData(data) { - var subtype = data.subtype; - var fieldType = data.fieldType; - var Constructor = Annotation.getConstructor(subtype, fieldType); - if (Constructor) { - return new Constructor({ data: data }); + abortRequest: function NetworkManager_abortRequest(xhrId) { + var xhr = this.pendingRequests[xhrId].xhr; + delete this.pendingRequests[xhrId]; + xhr.abort(); } }; - Annotation.fromRef = function Annotation_fromRef(xref, ref) { + return NetworkManager; +})(); - var dict = xref.fetchIfRef(ref); - if (!isDict(dict)) { - return; - } - var subtype = dict.get('Subtype'); - subtype = isName(subtype) ? subtype.name : ''; - if (!subtype) { - return; - } - var fieldType = Util.getInheritableProperty(dict, 'FT'); - fieldType = isName(fieldType) ? fieldType.name : ''; +var ChunkedStream = (function ChunkedStreamClosure() { + function ChunkedStream(length, chunkSize, manager) { + this.bytes = new Uint8Array(length); + this.start = 0; + this.pos = 0; + this.end = length; + this.chunkSize = chunkSize; + this.loadedChunks = []; + this.numChunksLoaded = 0; + this.numChunks = Math.ceil(length / chunkSize); + this.manager = manager; + this.initialDataLength = 0; + this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache + } - var Constructor = Annotation.getConstructor(subtype, fieldType); - if (!Constructor) { - return; - } + // required methods for a stream. if a particular stream does not + // implement these, an error should be thrown + ChunkedStream.prototype = { - var params = { - dict: dict, - ref: ref, - }; + getMissingChunks: function ChunkedStream_getMissingChunks() { + var chunks = []; + for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { + if (!(chunk in this.loadedChunks)) { + chunks.push(chunk); + } + } + return chunks; + }, - var annotation = new Constructor(params); + getBaseStreams: function ChunkedStream_getBaseStreams() { + return [this]; + }, - if (annotation.isViewable() || annotation.isPrintable()) { - return annotation; - } else { - if (SUPPORTED_TYPES.indexOf(subtype) === -1) { - warn('unimplemented annotation type: ' + subtype); - } - } - }; + allChunksLoaded: function ChunkedStream_allChunksLoaded() { + return this.numChunksLoaded === this.numChunks; + }, - Annotation.appendToOperatorList = function Annotation_appendToOperatorList( - annotations, opList, pdfManager, partialEvaluator, intent) { + onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { + var end = begin + chunk.byteLength; - function reject(e) { - annotationsReadyCapability.reject(e); - } + assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); + // Using this.length is inaccurate here since this.start can be moved + // See ChunkedStream.moveStart() + var length = this.bytes.length; + assert(end % this.chunkSize === 0 || end === length, + 'Bad end offset: ' + end); - var annotationsReadyCapability = createPromiseCapability(); + this.bytes.set(new Uint8Array(chunk), begin); + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + var curChunk; - var annotationPromises = []; - for (var i = 0, n = annotations.length; i < n; ++i) { - if (intent === 'display' && annotations[i].isViewable() || - intent === 'print' && annotations[i].isPrintable()) { - annotationPromises.push( - annotations[i].getOperatorList(partialEvaluator)); - } - } - Promise.all(annotationPromises).then(function(datas) { - opList.addOp(OPS.beginAnnotations, []); - for (var i = 0, n = datas.length; i < n; ++i) { - var annotOpList = datas[i]; - opList.addOpList(annotOpList); + for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { + if (!(curChunk in this.loadedChunks)) { + this.loadedChunks[curChunk] = true; + ++this.numChunksLoaded; + } } - opList.addOp(OPS.endAnnotations, []); - annotationsReadyCapability.resolve(); - }, reject); + }, - return annotationsReadyCapability.promise; - }; + onReceiveInitialData: function ChunkedStream_onReceiveInitialData(data) { + this.bytes.set(data); + this.initialDataLength = data.length; + var endChunk = (this.end === data.length ? + this.numChunks : Math.floor(data.length / this.chunkSize)); + for (var i = 0; i < endChunk; i++) { + this.loadedChunks[i] = true; + ++this.numChunksLoaded; + } + }, - return Annotation; -})(); -PDFJS.Annotation = Annotation; + ensureByte: function ChunkedStream_ensureRange(pos) { + var chunk = Math.floor(pos / this.chunkSize); + if (chunk === this.lastSuccessfulEnsureByteChunk) { + return; + } + if (!(chunk in this.loadedChunks)) { + throw new MissingDataException(pos, pos + 1); + } + this.lastSuccessfulEnsureByteChunk = chunk; + }, -var WidgetAnnotation = (function WidgetAnnotationClosure() { + ensureRange: function ChunkedStream_ensureRange(begin, end) { + if (begin >= end) { + return; + } - function WidgetAnnotation(params) { - Annotation.call(this, params); + if (end <= this.initialDataLength) { + return; + } - if (params.data) { - return; - } + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + throw new MissingDataException(begin, end); + } + } + }, - var dict = params.dict; - var data = this.data; - - data.fieldValue = stringToPDFString( - Util.getInheritableProperty(dict, 'V') || ''); - data.alternativeText = stringToPDFString(dict.get('TU') || ''); - data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || ''; - var fieldType = Util.getInheritableProperty(dict, 'FT'); - data.fieldType = isName(fieldType) ? fieldType.name : ''; - data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0; - this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty; - - // Building the full field name by collecting the field and - // its ancestors 'T' data and joining them using '.'. - var fieldName = []; - var namedItem = dict; - var ref = params.ref; - while (namedItem) { - var parent = namedItem.get('Parent'); - var parentRef = namedItem.getRaw('Parent'); - var name = namedItem.get('T'); - if (name) { - fieldName.unshift(stringToPDFString(name)); - } else { - // The field name is absent, that means more than one field - // with the same name may exist. Replacing the empty name - // with the '`' plus index in the parent's 'Kids' array. - // This is not in the PDF spec but necessary to id the - // the input controls. - var kids = parent.get('Kids'); - var j, jj; - for (j = 0, jj = kids.length; j < jj; j++) { - var kidRef = kids[j]; - if (kidRef.num == ref.num && kidRef.gen == ref.gen) { - break; - } + nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { + var chunk, n; + for (chunk = beginChunk, n = this.numChunks; chunk < n; ++chunk) { + if (!(chunk in this.loadedChunks)) { + return chunk; } - fieldName.unshift('`' + j); } - namedItem = parent; - ref = parentRef; - } - data.fullName = fieldName.join('.'); - } - - var parent = Annotation.prototype; - Util.inherit(WidgetAnnotation, Annotation, { - isViewable: function WidgetAnnotation_isViewable() { - if (this.data.fieldType === 'Sig') { - warn('unimplemented annotation type: Widget signature'); - return false; + // Wrap around to beginning + for (chunk = 0; chunk < beginChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + return chunk; + } } + return null; + }, - return parent.isViewable.call(this); - } - }); + hasChunk: function ChunkedStream_hasChunk(chunk) { + return chunk in this.loadedChunks; + }, - return WidgetAnnotation; -})(); + get length() { + return this.end - this.start; + }, -var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() { - function TextWidgetAnnotation(params) { - WidgetAnnotation.call(this, params); + get isEmpty() { + return this.length === 0; + }, - if (params.data) { - return; - } + getByte: function ChunkedStream_getByte() { + var pos = this.pos; + if (pos >= this.end) { + return -1; + } + this.ensureByte(pos); + return this.bytes[this.pos++]; + }, - this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q'); - } + getUint16: function ChunkedStream_getUint16() { + var b0 = this.getByte(); + var b1 = this.getByte(); + return (b0 << 8) + b1; + }, - // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont() - function setTextStyles(element, item, fontObj) { + getInt32: function ChunkedStream_getInt32() { + var b0 = this.getByte(); + var b1 = this.getByte(); + var b2 = this.getByte(); + var b3 = this.getByte(); + return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + }, - var style = element.style; - style.fontSize = item.fontSize + 'px'; - style.direction = item.fontDirection < 0 ? 'rtl': 'ltr'; + // returns subarray of original buffer + // should only be read + getBytes: function ChunkedStream_getBytes(length) { + var bytes = this.bytes; + var pos = this.pos; + var strEnd = this.end; - if (!fontObj) { - return; - } + if (!length) { + this.ensureRange(pos, strEnd); + return bytes.subarray(pos, strEnd); + } - style.fontWeight = fontObj.black ? - (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - style.fontStyle = fontObj.italic ? 'italic' : 'normal'; + var end = pos + length; + if (end > strEnd) { + end = strEnd; + } + this.ensureRange(pos, end); - var fontName = fontObj.loadedName; - var fontFamily = fontName ? '"' + fontName + '", ' : ''; - // Use a reasonable default font if the font doesn't specify a fallback - var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif'; - style.fontFamily = fontFamily + fallbackName; - } + this.pos = end; + return bytes.subarray(pos, end); + }, + peekBytes: function ChunkedStream_peekBytes(length) { + var bytes = this.getBytes(length); + this.pos -= bytes.length; + return bytes; + }, - Util.inherit(TextWidgetAnnotation, WidgetAnnotation, { - hasHtml: function TextWidgetAnnotation_hasHtml() { - return !this.data.hasAppearance && !!this.data.fieldValue; + getByteRange: function ChunkedStream_getBytes(begin, end) { + this.ensureRange(begin, end); + return this.bytes.subarray(begin, end); }, - getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); + skip: function ChunkedStream_skip(n) { + if (!n) { + n = 1; + } + this.pos += n; + }, - var item = this.data; + reset: function ChunkedStream_reset() { + this.pos = this.start; + }, - var element = this.getEmptyContainer('div'); - element.style.display = 'table'; + moveStart: function ChunkedStream_moveStart() { + this.start = this.pos; + }, - var content = document.createElement('div'); - content.textContent = item.fieldValue; - var textAlignment = item.textAlignment; - content.style.textAlign = ['left', 'center', 'right'][textAlignment]; - content.style.verticalAlign = 'middle'; - content.style.display = 'table-cell'; + makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { + this.ensureRange(start, start + length); - var fontObj = item.fontRefName ? - commonObjs.getData(item.fontRefName) : null; - setTextStyles(content, item, fontObj); + function ChunkedStreamSubstream() {} + ChunkedStreamSubstream.prototype = Object.create(this); + ChunkedStreamSubstream.prototype.getMissingChunks = function() { + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(this.start / chunkSize); + var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; + var missingChunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!(chunk in this.loadedChunks)) { + missingChunks.push(chunk); + } + } + return missingChunks; + }; + var subStream = new ChunkedStreamSubstream(); + subStream.pos = subStream.start = start; + subStream.end = start + length || this.end; + subStream.dict = dict; + return subStream; + }, - element.appendChild(content); + isStream: true + }; - return element; - }, + return ChunkedStream; +})(); - getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) { - if (this.appearance) { - return Annotation.prototype.getOperatorList.call(this, evaluator); - } +var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { - var opList = new OperatorList(); - var data = this.data; + function ChunkedStreamManager(length, chunkSize, url, args) { + this.stream = new ChunkedStream(length, chunkSize, this); + this.length = length; + this.chunkSize = chunkSize; + this.url = url; + this.disableAutoFetch = args.disableAutoFetch; + var msgHandler = this.msgHandler = args.msgHandler; - // Even if there is an appearance stream, ignore it. This is the - // behaviour used by Adobe Reader. - if (!data.defaultAppearance) { - return Promise.resolve(opList); - } + if (args.chunkedViewerLoading) { + msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); + msgHandler.on('OnDataProgress', this.onProgress.bind(this)); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + msgHandler.send('RequestDataRange', { begin: begin, end: end }); + }; + } else { - var stream = new Stream(stringToBytes(data.defaultAppearance)); - return evaluator.getOperatorList(stream, this.fieldResources, opList). - then(function () { - return opList; + var getXhr = function getXhr() { + return new XMLHttpRequest(); + }; + this.networkManager = new NetworkManager(this.url, { + getXhr: getXhr, + httpHeaders: args.httpHeaders, + withCredentials: args.withCredentials + }); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + this.networkManager.requestRange(begin, end, { + onDone: this.onReceiveData.bind(this), + onProgress: this.onProgress.bind(this) }); + }; } - }); - return TextWidgetAnnotation; -})(); + this.currRequestId = 0; -var InteractiveAnnotation = (function InteractiveAnnotationClosure() { - function InteractiveAnnotation(params) { - Annotation.call(this, params); + this.chunksNeededByRequest = {}; + this.requestsByChunk = {}; + this.callbacksByRequest = {}; + + this._loadedStreamCapability = createPromiseCapability(); + + if (args.initialData) { + this.setInitialData(args.initialData); + } } - Util.inherit(InteractiveAnnotation, Annotation, { - hasHtml: function InteractiveAnnotation_hasHtml() { - return true; - }, + ChunkedStreamManager.prototype = { - highlight: function InteractiveAnnotation_highlight() { - if (this.highlightElement && - this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.removeAttribute('hidden'); + setInitialData: function ChunkedStreamManager_setInitialData(data) { + this.stream.onReceiveInitialData(data); + if (this.stream.allChunksLoaded()) { + this._loadedStreamCapability.resolve(this.stream); + } else if (this.msgHandler) { + this.msgHandler.send('DocProgress', { + loaded: data.length, + total: this.length + }); } }, - unhighlight: function InteractiveAnnotation_unhighlight() { - if (this.highlightElement && - !this.highlightElement.hasAttribute('hidden')) { - this.highlightElement.setAttribute('hidden', true); - } + onLoadedStream: function ChunkedStreamManager_getLoadedStream() { + return this._loadedStreamCapability.promise; }, - initContainer: function InteractiveAnnotation_initContainer() { - - var item = this.data; - var rect = item.rect; + // Get all the chunks that are not yet loaded and groups them into + // contiguous ranges to load in as few requests as possible + requestAllChunks: function ChunkedStreamManager_requestAllChunks() { + var missingChunks = this.stream.getMissingChunks(); + this.requestChunks(missingChunks); + return this._loadedStreamCapability.promise; + }, - var container = this.getEmptyContainer('section', rect, item.borderWidth); - container.style.backgroundColor = item.color; + requestChunks: function ChunkedStreamManager_requestChunks(chunks, + callback) { + var requestId = this.currRequestId++; - var color = item.color; - var rgb = []; - for (var i = 0; i < 3; ++i) { - rgb[i] = Math.round(color[i] * 255); + var chunksNeeded; + var i, ii; + this.chunksNeededByRequest[requestId] = chunksNeeded = {}; + for (i = 0, ii = chunks.length; i < ii; i++) { + if (!this.stream.hasChunk(chunks[i])) { + chunksNeeded[chunks[i]] = true; + } } - item.colorCssRgb = Util.makeCssRgb(rgb); - - var highlight = document.createElement('div'); - highlight.className = 'annotationHighlight'; - highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px'; - highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px'; - highlight.setAttribute('hidden', true); - this.highlightElement = highlight; - container.appendChild(this.highlightElement); + if (isEmptyObj(chunksNeeded)) { + if (callback) { + callback(); + } + return; + } - return container; - } - }); + this.callbacksByRequest[requestId] = callback; - return InteractiveAnnotation; -})(); + var chunksToRequest = []; + for (var chunk in chunksNeeded) { + chunk = chunk | 0; + if (!(chunk in this.requestsByChunk)) { + this.requestsByChunk[chunk] = []; + chunksToRequest.push(chunk); + } + this.requestsByChunk[chunk].push(requestId); + } -var TextAnnotation = (function TextAnnotationClosure() { - function TextAnnotation(params) { - InteractiveAnnotation.call(this, params); + if (!chunksToRequest.length) { + return; + } - if (params.data) { - return; - } + var groupedChunksToRequest = this.groupChunks(chunksToRequest); - var dict = params.dict; - var data = this.data; + for (i = 0; i < groupedChunksToRequest.length; ++i) { + var groupedChunk = groupedChunksToRequest[i]; + var begin = groupedChunk.beginChunk * this.chunkSize; + var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); + this.sendRequest(begin, end); + } + }, - var content = dict.get('Contents'); - var title = dict.get('T'); - data.content = stringToPDFString(content || ''); - data.title = stringToPDFString(title || ''); + getStream: function ChunkedStreamManager_getStream() { + return this.stream; + }, - if (data.hasAppearance) { - data.name = 'NoIcon'; - } else { - data.rect[1] = data.rect[3] - DEFAULT_ICON_SIZE; - data.rect[2] = data.rect[0] + DEFAULT_ICON_SIZE; - data.name = dict.has('Name') ? dict.get('Name').name : 'Note'; - } + // Loads any chunks in the requested range that are not yet loaded + requestRange: function ChunkedStreamManager_requestRange( + begin, end, callback) { - if (dict.has('C')) { - data.hasBgColor = true; - } - } + end = Math.min(end, this.length); - var ANNOT_MIN_SIZE = 10; + var beginChunk = this.getBeginChunk(begin); + var endChunk = this.getEndChunk(end); - Util.inherit(TextAnnotation, InteractiveAnnotation, { + var chunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + chunks.push(chunk); + } - getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) { - assert(!isWorker, 'getHtmlElement() shall be called from main thread'); + this.requestChunks(chunks, callback); + }, - var item = this.data; - var rect = item.rect; + requestRanges: function ChunkedStreamManager_requestRanges(ranges, + callback) { + ranges = ranges || []; + var chunksToRequest = []; - // sanity check because of OOo-generated PDFs - if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) { - rect[3] = rect[1] + ANNOT_MIN_SIZE; - } - if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) { - rect[2] = rect[0] + (rect[3] - rect[1]); // make it square + for (var i = 0; i < ranges.length; i++) { + var beginChunk = this.getBeginChunk(ranges[i].begin); + var endChunk = this.getEndChunk(ranges[i].end); + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (chunksToRequest.indexOf(chunk) < 0) { + chunksToRequest.push(chunk); + } + } } - var container = this.initContainer(); - container.className = 'annotText'; - - var image = document.createElement('img'); - image.style.height = container.style.height; - image.style.width = container.style.width; - var iconName = item.name; - image.src = PDFJS.imageResourcesPath + 'annotation-' + - iconName.toLowerCase() + '.svg'; - image.alt = '[{{type}} Annotation]'; - image.dataset.l10nId = 'text_annotation_type'; - image.dataset.l10nArgs = JSON.stringify({type: iconName}); + chunksToRequest.sort(function(a, b) { return a - b; }); + this.requestChunks(chunksToRequest, callback); + }, - var contentWrapper = document.createElement('div'); - contentWrapper.className = 'annotTextContentWrapper'; - contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px'; - contentWrapper.style.top = '-10px'; + // Groups a sorted array of chunks into as few continguous larger + // chunks as possible + groupChunks: function ChunkedStreamManager_groupChunks(chunks) { + var groupedChunks = []; + var beginChunk = -1; + var prevChunk = -1; + for (var i = 0; i < chunks.length; ++i) { + var chunk = chunks[i]; - var content = document.createElement('div'); - content.className = 'annotTextContent'; - content.setAttribute('hidden', true); + if (beginChunk < 0) { + beginChunk = chunk; + } - var i, ii; - if (item.hasBgColor) { - var color = item.color; - var rgb = []; - for (i = 0; i < 3; ++i) { - // Enlighten the color (70%) - var c = Math.round(color[i] * 255); - rgb[i] = Math.round((255 - c) * 0.7) + c; + if (prevChunk >= 0 && prevChunk + 1 !== chunk) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: prevChunk + 1 }); + beginChunk = chunk; + } + if (i + 1 === chunks.length) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: chunk + 1 }); } - content.style.backgroundColor = Util.makeCssRgb(rgb); + + prevChunk = chunk; } + return groupedChunks; + }, - var title = document.createElement('h1'); - var text = document.createElement('p'); - title.textContent = item.title; + onProgress: function ChunkedStreamManager_onProgress(args) { + var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + + args.loaded); + this.msgHandler.send('DocProgress', { + loaded: bytesLoaded, + total: this.length + }); + }, - if (!item.content && !item.title) { - content.setAttribute('hidden', true); - } else { - var e = document.createElement('span'); - var lines = item.content.split(/(?:\r\n?|\n)/); - for (i = 0, ii = lines.length; i < ii; ++i) { - var line = lines[i]; - e.appendChild(document.createTextNode(line)); - if (i < (ii - 1)) { - e.appendChild(document.createElement('br')); - } - } - text.appendChild(e); + onReceiveData: function ChunkedStreamManager_onReceiveData(args) { + var chunk = args.chunk; + var begin = args.begin; + var end = begin + chunk.byteLength; - var pinned = false; + var beginChunk = this.getBeginChunk(begin); + var endChunk = this.getEndChunk(end); - var showAnnotation = function showAnnotation(pin) { - if (pin) { - pinned = true; - } - if (content.hasAttribute('hidden')) { - container.style.zIndex += 1; - content.removeAttribute('hidden'); - } - }; + this.stream.onReceiveData(begin, chunk); + if (this.stream.allChunksLoaded()) { + this._loadedStreamCapability.resolve(this.stream); + } - var hideAnnotation = function hideAnnotation(unpin) { - if (unpin) { - pinned = false; - } - if (!content.hasAttribute('hidden') && !pinned) { - container.style.zIndex -= 1; - content.setAttribute('hidden', true); + var loadedRequests = []; + var i, requestId; + for (chunk = beginChunk; chunk < endChunk; ++chunk) { + // The server might return more chunks than requested + var requestIds = this.requestsByChunk[chunk] || []; + delete this.requestsByChunk[chunk]; + + for (i = 0; i < requestIds.length; ++i) { + requestId = requestIds[i]; + var chunksNeeded = this.chunksNeededByRequest[requestId]; + if (chunk in chunksNeeded) { + delete chunksNeeded[chunk]; } - }; - var toggleAnnotation = function toggleAnnotation() { - if (pinned) { - hideAnnotation(true); - } else { - showAnnotation(true); + if (!isEmptyObj(chunksNeeded)) { + continue; } - }; - image.addEventListener('click', function image_clickHandler() { - toggleAnnotation(); - }, false); - image.addEventListener('mouseover', function image_mouseOverHandler() { - showAnnotation(); - }, false); - image.addEventListener('mouseout', function image_mouseOutHandler() { - hideAnnotation(); - }, false); + loadedRequests.push(requestId); + } + } - content.addEventListener('click', function content_clickHandler() { - hideAnnotation(true); - }, false); + // If there are no pending requests, automatically fetch the next + // unfetched chunk of the PDF + if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { + var nextEmptyChunk; + if (this.stream.numChunksLoaded === 1) { + // This is a special optimization so that after fetching the first + // chunk, rather than fetching the second chunk, we fetch the last + // chunk. + var lastChunk = this.stream.numChunks - 1; + if (!this.stream.hasChunk(lastChunk)) { + nextEmptyChunk = lastChunk; + } + } else { + nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); + } + if (isInt(nextEmptyChunk)) { + this.requestChunks([nextEmptyChunk]); + } } - content.appendChild(title); - content.appendChild(text); - contentWrapper.appendChild(content); - container.appendChild(image); - container.appendChild(contentWrapper); + for (i = 0; i < loadedRequests.length; ++i) { + requestId = loadedRequests[i]; + var callback = this.callbacksByRequest[requestId]; + delete this.callbacksByRequest[requestId]; + if (callback) { + callback(); + } + } - return container; - } - }); + this.msgHandler.send('DocProgress', { + loaded: this.stream.numChunksLoaded * this.chunkSize, + total: this.length + }); + }, - return TextAnnotation; -})(); + onError: function ChunkedStreamManager_onError(err) { + this._loadedStreamCapability.reject(err); + }, -var LinkAnnotation = (function LinkAnnotationClosure() { - function LinkAnnotation(params) { - InteractiveAnnotation.call(this, params); + getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { + var chunk = Math.floor(begin / this.chunkSize); + return chunk; + }, - if (params.data) { - return; + getEndChunk: function ChunkedStreamManager_getEndChunk(end) { + if (end % this.chunkSize === 0) { + return end / this.chunkSize; + } + + // 0 -> 0 + // 1 -> 1 + // 99 -> 1 + // 100 -> 1 + // 101 -> 2 + var chunk = Math.floor((end - 1) / this.chunkSize) + 1; + return chunk; } + }; - var dict = params.dict; - var data = this.data; + return ChunkedStreamManager; +})(); - var action = dict.get('A'); - if (action) { - var linkType = action.get('S').name; - if (linkType === 'URI') { - var url = action.get('URI'); - if (isName(url)) { - // Some bad PDFs do not put parentheses around relative URLs. - url = '/' + url.name; - } else if (url) { - url = addDefaultProtocolToUrl(url); - } - // TODO: pdf spec mentions urls can be relative to a Base - // entry in the dictionary. - if (!isValidUrl(url, false)) { - url = ''; - } - data.url = url; - } else if (linkType === 'GoTo') { - data.dest = action.get('D'); - } else if (linkType === 'GoToR') { - var urlDict = action.get('F'); - if (isDict(urlDict)) { - // We assume that the 'url' is a Filspec dictionary - // and fetch the url without checking any further - url = urlDict.get('F') || ''; - } - // TODO: pdf reference says that GoToR - // can also have 'NewWindow' attribute - if (!isValidUrl(url, false)) { - url = ''; - } - data.url = url; - data.dest = action.get('D'); - } else if (linkType === 'Named') { - data.action = action.get('N').name; - } else { - warn('unrecognized link type: ' + linkType); - } - } else if (dict.has('Dest')) { - // simple destination link - var dest = dict.get('Dest'); - data.dest = isName(dest) ? dest.name : dest; - } - } - // Lets URLs beginning with 'www.' default to using the 'http://' protocol. - function addDefaultProtocolToUrl(url) { - if (url && url.indexOf('www.') === 0) { - return ('http://' + url); - } - return url; +// The maximum number of bytes fetched per range request +var RANGE_CHUNK_SIZE = 65536; + +// TODO(mack): Make use of PDFJS.Util.inherit() when it becomes available +var BasePdfManager = (function BasePdfManagerClosure() { + function BasePdfManager() { + throw new Error('Cannot initialize BaseManagerManager'); } - Util.inherit(LinkAnnotation, InteractiveAnnotation, { - hasOperatorList: function LinkAnnotation_hasOperatorList() { - return false; + BasePdfManager.prototype = { + onLoadedStream: function BasePdfManager_onLoadedStream() { + throw new NotImplementedException(); }, - getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) { - - var container = this.initContainer(); - container.className = 'annotLink'; - - var item = this.data; + ensureDoc: function BasePdfManager_ensureDoc(prop, args) { + return this.ensure(this.pdfDocument, prop, args); + }, - container.style.borderColor = item.colorCssRgb; - container.style.borderStyle = 'solid'; + ensureXRef: function BasePdfManager_ensureXRef(prop, args) { + return this.ensure(this.pdfDocument.xref, prop, args); + }, - var link = document.createElement('a'); - link.href = link.title = this.data.url || ''; + ensureCatalog: function BasePdfManager_ensureCatalog(prop, args) { + return this.ensure(this.pdfDocument.catalog, prop, args); + }, - container.appendChild(link); + getPage: function BasePdfManager_pagePage(pageIndex) { + return this.pdfDocument.getPage(pageIndex); + }, - return container; - } - }); + cleanup: function BasePdfManager_cleanup() { + return this.pdfDocument.cleanup(); + }, - return LinkAnnotation; -})(); + ensure: function BasePdfManager_ensure(obj, prop, args) { + return new NotImplementedException(); + }, + requestRange: function BasePdfManager_ensure(begin, end) { + return new NotImplementedException(); + }, + requestLoadedStream: function BasePdfManager_requestLoadedStream() { + return new NotImplementedException(); + }, + updatePassword: function BasePdfManager_updatePassword(password) { + this.pdfDocument.xref.password = this.password = password; + if (this._passwordChangedCapability) { + this._passwordChangedCapability.resolve(); + } + }, -var NetworkManager = (function NetworkManagerClosure() { + passwordChanged: function BasePdfManager_passwordChanged() { + this._passwordChangedCapability = createPromiseCapability(); + return this._passwordChangedCapability.promise; + }, - var OK_RESPONSE = 200; - var PARTIAL_CONTENT_RESPONSE = 206; + terminate: function BasePdfManager_terminate() { + return new NotImplementedException(); + } + }; - function NetworkManager(url, args) { - this.url = url; - args = args || {}; - this.isHttp = /^https?:/i.test(url); - this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; - this.withCredentials = args.withCredentials || false; - this.getXhr = args.getXhr || - function NetworkManager_getXhr() { - return new XMLHttpRequest(); - }; + return BasePdfManager; +})(); - this.currXhrId = 0; - this.pendingRequests = {}; - this.loadedRequests = {}; +var LocalPdfManager = (function LocalPdfManagerClosure() { + function LocalPdfManager(data, password) { + var stream = new Stream(data); + this.pdfDocument = new PDFDocument(this, stream, password); + this._loadedStreamCapability = createPromiseCapability(); + this._loadedStreamCapability.resolve(stream); } - function getArrayBuffer(xhr) { - var data = xhr.response; - if (typeof data !== 'string') { - return data; - } - var length = data.length; - var buffer = new Uint8Array(length); - for (var i = 0; i < length; i++) { - buffer[i] = data.charCodeAt(i) & 0xFF; - } - return buffer; - } + LocalPdfManager.prototype = Object.create(BasePdfManager.prototype); + LocalPdfManager.prototype.constructor = LocalPdfManager; - NetworkManager.prototype = { - requestRange: function NetworkManager_requestRange(begin, end, listeners) { - var args = { - begin: begin, - end: end - }; - for (var prop in listeners) { - args[prop] = listeners[prop]; + LocalPdfManager.prototype.ensure = + function LocalPdfManager_ensure(obj, prop, args) { + return new Promise(function (resolve, reject) { + try { + var value = obj[prop]; + var result; + if (typeof value === 'function') { + result = value.apply(obj, args); + } else { + result = value; + } + resolve(result); + } catch (e) { + reject(e); } - return this.request(args); - }, + }); + }; - requestFull: function NetworkManager_requestRange(listeners) { - return this.request(listeners); - }, + LocalPdfManager.prototype.requestRange = + function LocalPdfManager_requestRange(begin, end) { + return Promise.resolve(); + }; - request: function NetworkManager_requestRange(args) { - var xhr = this.getXhr(); - var xhrId = this.currXhrId++; - var pendingRequest = this.pendingRequests[xhrId] = { - xhr: xhr - }; + LocalPdfManager.prototype.requestLoadedStream = + function LocalPdfManager_requestLoadedStream() { + }; - xhr.open('GET', this.url); - xhr.withCredentials = this.withCredentials; - for (var property in this.httpHeaders) { - var value = this.httpHeaders[property]; - if (typeof value === 'undefined') { - continue; - } - xhr.setRequestHeader(property, value); - } - if (this.isHttp && 'begin' in args && 'end' in args) { - var rangeStr = args.begin + '-' + (args.end - 1); - xhr.setRequestHeader('Range', 'bytes=' + rangeStr); - pendingRequest.expectedStatus = 206; - } else { - pendingRequest.expectedStatus = 200; - } + LocalPdfManager.prototype.onLoadedStream = + function LocalPdfManager_getLoadedStream() { + return this._loadedStreamCapability.promise; + }; - xhr.responseType = 'arraybuffer'; + LocalPdfManager.prototype.terminate = + function LocalPdfManager_terminate() { + return; + }; - if (args.onProgress) { - xhr.onprogress = args.onProgress; - } - if (args.onError) { - xhr.onerror = function(evt) { - args.onError(xhr.status); - }; - } - xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); + return LocalPdfManager; +})(); - pendingRequest.onHeadersReceived = args.onHeadersReceived; - pendingRequest.onDone = args.onDone; - pendingRequest.onError = args.onError; +var NetworkPdfManager = (function NetworkPdfManagerClosure() { + function NetworkPdfManager(args, msgHandler) { - xhr.send(null); + this.msgHandler = msgHandler; - return xhrId; - }, + var params = { + msgHandler: msgHandler, + httpHeaders: args.httpHeaders, + withCredentials: args.withCredentials, + chunkedViewerLoading: args.chunkedViewerLoading, + disableAutoFetch: args.disableAutoFetch, + initialData: args.initialData + }; + this.streamManager = new ChunkedStreamManager(args.length, RANGE_CHUNK_SIZE, + args.url, params); - onStateChange: function NetworkManager_onStateChange(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } + this.pdfDocument = new PDFDocument(this, this.streamManager.getStream(), + args.password); + } - var xhr = pendingRequest.xhr; - if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { - pendingRequest.onHeadersReceived(); - delete pendingRequest.onHeadersReceived; - } + NetworkPdfManager.prototype = Object.create(BasePdfManager.prototype); + NetworkPdfManager.prototype.constructor = NetworkPdfManager; - if (xhr.readyState !== 4) { - return; - } + NetworkPdfManager.prototype.ensure = + function NetworkPdfManager_ensure(obj, prop, args) { + var pdfManager = this; - if (!(xhrId in this.pendingRequests)) { - // The XHR request might have been aborted in onHeadersReceived() - // callback, in which case we should abort request - return; + return new Promise(function (resolve, reject) { + function ensureHelper() { + try { + var result; + var value = obj[prop]; + if (typeof value === 'function') { + result = value.apply(obj, args); + } else { + result = value; + } + resolve(result); + } catch(e) { + if (!(e instanceof MissingDataException)) { + reject(e); + return; + } + pdfManager.streamManager.requestRange(e.begin, e.end, ensureHelper); + } } - delete this.pendingRequests[xhrId]; - - // success status == 0 can be on ftp, file and other protocols - if (xhr.status === 0 && this.isHttp) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - var xhrStatus = xhr.status || OK_RESPONSE; - - // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: - // "A server MAY ignore the Range header". This means it's possible to - // get a 200 rather than a 206 response from a range request. - var ok_response_on_range_request = - xhrStatus === OK_RESPONSE && - pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; - - if (!ok_response_on_range_request && - xhrStatus !== pendingRequest.expectedStatus) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - - this.loadedRequests[xhrId] = true; - - var chunk = getArrayBuffer(xhr); - if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { - var rangeHeader = xhr.getResponseHeader('Content-Range'); - var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); - var begin = parseInt(matches[1], 10); - pendingRequest.onDone({ - begin: begin, - chunk: chunk - }); - } else { - pendingRequest.onDone({ - begin: 0, - chunk: chunk - }); - } - }, - - hasPendingRequests: function NetworkManager_hasPendingRequests() { - for (var xhrId in this.pendingRequests) { - return true; - } - return false; - }, - - getRequestXhr: function NetworkManager_getXhr(xhrId) { - return this.pendingRequests[xhrId].xhr; - }, + ensureHelper(); + }); + }; - isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { - return xhrId in this.pendingRequests; - }, + NetworkPdfManager.prototype.requestRange = + function NetworkPdfManager_requestRange(begin, end) { + return new Promise(function (resolve) { + this.streamManager.requestRange(begin, end, function() { + resolve(); + }); + }.bind(this)); + }; - isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { - return xhrId in this.loadedRequests; - }, + NetworkPdfManager.prototype.requestLoadedStream = + function NetworkPdfManager_requestLoadedStream() { + this.streamManager.requestAllChunks(); + }; - abortAllRequests: function NetworkManager_abortAllRequests() { - for (var xhrId in this.pendingRequests) { - this.abortRequest(xhrId | 0); - } - }, + NetworkPdfManager.prototype.onLoadedStream = + function NetworkPdfManager_getLoadedStream() { + return this.streamManager.onLoadedStream(); + }; - abortRequest: function NetworkManager_abortRequest(xhrId) { - var xhr = this.pendingRequests[xhrId].xhr; - delete this.pendingRequests[xhrId]; - xhr.abort(); - } + NetworkPdfManager.prototype.terminate = + function NetworkPdfManager_terminate() { + this.streamManager.networkManager.abortAllRequests(); }; - return NetworkManager; + return NetworkPdfManager; })(); -var ChunkedStream = (function ChunkedStreamClosure() { - function ChunkedStream(length, chunkSize, manager) { - this.bytes = new Uint8Array(length); - this.start = 0; - this.pos = 0; - this.end = length; - this.chunkSize = chunkSize; - this.loadedChunks = []; - this.numChunksLoaded = 0; - this.numChunks = Math.ceil(length / chunkSize); - this.manager = manager; - this.initialDataLength = 0; - this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache +var Page = (function PageClosure() { + + var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792]; + + function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) { + this.pdfManager = pdfManager; + this.pageIndex = pageIndex; + this.pageDict = pageDict; + this.xref = xref; + this.ref = ref; + this.fontCache = fontCache; + this.idCounters = { + obj: 0 + }; + this.resourcesPromise = null; } - // required methods for a stream. if a particular stream does not - // implement these, an error should be thrown - ChunkedStream.prototype = { + Page.prototype = { + getPageProp: function Page_getPageProp(key) { + return this.pageDict.get(key); + }, - getMissingChunks: function ChunkedStream_getMissingChunks() { - var chunks = []; - for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { - if (!(chunk in this.loadedChunks)) { - chunks.push(chunk); + getInheritedPageProp: function Page_inheritPageProp(key) { + var dict = this.pageDict; + var value = dict.get(key); + while (value === undefined) { + dict = dict.get('Parent'); + if (!dict) { + break; } + value = dict.get(key); } - return chunks; - }, - - getBaseStreams: function ChunkedStream_getBaseStreams() { - return [this]; + return value; }, - allChunksLoaded: function ChunkedStream_allChunksLoaded() { - return this.numChunksLoaded === this.numChunks; + get content() { + return this.getPageProp('Contents'); }, - onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { - var end = begin + chunk.byteLength; - - assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); - // Using this.length is inaccurate here since this.start can be moved - // See ChunkedStream.moveStart() - var length = this.bytes.length; - assert(end % this.chunkSize === 0 || end === length, - 'Bad end offset: ' + end); - - this.bytes.set(new Uint8Array(chunk), begin); - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - var curChunk; - - for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { - if (!(curChunk in this.loadedChunks)) { - this.loadedChunks[curChunk] = true; - ++this.numChunksLoaded; - } + get resources() { + var value = this.getInheritedPageProp('Resources'); + // For robustness: The spec states that a \Resources entry has to be + // present, but can be empty. Some document omit it still. In this case + // return an empty dictionary: + if (value === undefined) { + value = Dict.empty; } + return shadow(this, 'resources', value); }, - onReceiveInitialData: function ChunkedStream_onReceiveInitialData(data) { - this.bytes.set(data); - this.initialDataLength = data.length; - var endChunk = (this.end === data.length ? - this.numChunks : Math.floor(data.length / this.chunkSize)); - for (var i = 0; i < endChunk; i++) { - this.loadedChunks[i] = true; - ++this.numChunksLoaded; + get mediaBox() { + var obj = this.getInheritedPageProp('MediaBox'); + // Reset invalid media box to letter size. + if (!isArray(obj) || obj.length !== 4) { + obj = LETTER_SIZE_MEDIABOX; } + return shadow(this, 'mediaBox', obj); }, - ensureByte: function ChunkedStream_ensureRange(pos) { - var chunk = Math.floor(pos / this.chunkSize); - if (chunk === this.lastSuccessfulEnsureByteChunk) { - return; + get view() { + var mediaBox = this.mediaBox; + var cropBox = this.getInheritedPageProp('CropBox'); + if (!isArray(cropBox) || cropBox.length !== 4) { + return shadow(this, 'view', mediaBox); } - if (!(chunk in this.loadedChunks)) { - throw new MissingDataException(pos, pos + 1); + // From the spec, 6th ed., p.963: + // "The crop, bleed, trim, and art boxes should not ordinarily + // extend beyond the boundaries of the media box. If they do, they are + // effectively reduced to their intersection with the media box." + cropBox = Util.intersect(cropBox, mediaBox); + if (!cropBox) { + return shadow(this, 'view', mediaBox); } - this.lastSuccessfulEnsureByteChunk = chunk; + return shadow(this, 'view', cropBox); }, - ensureRange: function ChunkedStream_ensureRange(begin, end) { - if (begin >= end) { - return; - } - - if (end <= this.initialDataLength) { - return; - } + get annotationRefs() { + return shadow(this, 'annotationRefs', + this.getInheritedPageProp('Annots')); + }, - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - throw new MissingDataException(begin, end); - } + get rotate() { + var rotate = this.getInheritedPageProp('Rotate') || 0; + // Normalize rotation so it's a multiple of 90 and between 0 and 270 + if (rotate % 90 !== 0) { + rotate = 0; + } else if (rotate >= 360) { + rotate = rotate % 360; + } else if (rotate < 0) { + // The spec doesn't cover negatives, assume its counterclockwise + // rotation. The following is the other implementation of modulo. + rotate = ((rotate % 360) + 360) % 360; } + return shadow(this, 'rotate', rotate); }, - nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { - var chunk, n; - for (chunk = beginChunk, n = this.numChunks; chunk < n; ++chunk) { - if (!(chunk in this.loadedChunks)) { - return chunk; - } - } - // Wrap around to beginning - for (chunk = 0; chunk < beginChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - return chunk; + getContentStream: function Page_getContentStream() { + var content = this.content; + var stream; + if (isArray(content)) { + // fetching items + var xref = this.xref; + var i, n = content.length; + var streams = []; + for (i = 0; i < n; ++i) { + streams.push(xref.fetchIfRef(content[i])); } + stream = new StreamsSequenceStream(streams); + } else if (isStream(content)) { + stream = content; + } else { + // replacing non-existent page content with empty one + stream = new NullStream(); } - return null; - }, - - hasChunk: function ChunkedStream_hasChunk(chunk) { - return chunk in this.loadedChunks; + return stream; }, - get length() { - return this.end - this.start; + loadResources: function Page_loadResources(keys) { + if (!this.resourcesPromise) { + // TODO: add async getInheritedPageProp and remove this. + this.resourcesPromise = this.pdfManager.ensure(this, 'resources'); + } + return this.resourcesPromise.then(function resourceSuccess() { + var objectLoader = new ObjectLoader(this.resources.map, + keys, + this.xref); + return objectLoader.load(); + }.bind(this)); }, - get isEmpty() { - return this.length === 0; - }, + getOperatorList: function Page_getOperatorList(handler, intent) { + var self = this; - getByte: function ChunkedStream_getByte() { - var pos = this.pos; - if (pos >= this.end) { - return -1; - } - this.ensureByte(pos); - return this.bytes[this.pos++]; - }, + var pdfManager = this.pdfManager; + var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', + []); + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'ColorSpace', + 'Pattern', + 'Shading', + 'XObject', + 'Font' + // ProcSet + // Properties + ]); - getUint16: function ChunkedStream_getUint16() { - var b0 = this.getByte(); - var b1 = this.getByte(); - return (b0 << 8) + b1; - }, + var partialEvaluator = new PartialEvaluator(pdfManager, this.xref, + handler, this.pageIndex, + 'p' + this.pageIndex + '_', + this.idCounters, + this.fontCache); - getInt32: function ChunkedStream_getInt32() { - var b0 = this.getByte(); - var b1 = this.getByte(); - var b2 = this.getByte(); - var b3 = this.getByte(); - return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; - }, + var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]); + var pageListPromise = dataPromises.then(function(data) { + var contentStream = data[0]; + var opList = new OperatorList(intent, handler, self.pageIndex); - // returns subarray of original buffer - // should only be read - getBytes: function ChunkedStream_getBytes(length) { - var bytes = this.bytes; - var pos = this.pos; - var strEnd = this.end; + handler.send('StartRenderPage', { + transparency: partialEvaluator.hasBlendModes(self.resources), + pageIndex: self.pageIndex, + intent: intent + }); + return partialEvaluator.getOperatorList(contentStream, self.resources, + opList).then(function () { + return opList; + }); + }); - if (!length) { - this.ensureRange(pos, strEnd); - return bytes.subarray(pos, strEnd); - } + var annotationsPromise = pdfManager.ensure(this, 'annotations'); + return Promise.all([pageListPromise, annotationsPromise]).then( + function(datas) { + var pageOpList = datas[0]; + var annotations = datas[1]; - var end = pos + length; - if (end > strEnd) { - end = strEnd; - } - this.ensureRange(pos, end); + if (annotations.length === 0) { + pageOpList.flush(true); + return pageOpList; + } - this.pos = end; - return bytes.subarray(pos, end); + var annotationsReadyPromise = Annotation.appendToOperatorList( + annotations, pageOpList, pdfManager, partialEvaluator, intent); + return annotationsReadyPromise.then(function () { + pageOpList.flush(true); + return pageOpList; + }); + }); }, - peekBytes: function ChunkedStream_peekBytes(length) { - var bytes = this.getBytes(length); - this.pos -= bytes.length; - return bytes; - }, + extractTextContent: function Page_extractTextContent() { + var handler = { + on: function nullHandlerOn() {}, + send: function nullHandlerSend() {} + }; - getByteRange: function ChunkedStream_getBytes(begin, end) { - this.ensureRange(begin, end); - return this.bytes.subarray(begin, end); - }, + var self = this; - skip: function ChunkedStream_skip(n) { - if (!n) { - n = 1; - } - this.pos += n; - }, + var pdfManager = this.pdfManager; + var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', + []); - reset: function ChunkedStream_reset() { - this.pos = this.start; - }, + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'XObject', + 'Font' + ]); - moveStart: function ChunkedStream_moveStart() { - this.start = this.pos; - }, + var dataPromises = Promise.all([contentStreamPromise, + resourcesPromise]); + return dataPromises.then(function(data) { + var contentStream = data[0]; + var partialEvaluator = new PartialEvaluator(pdfManager, self.xref, + handler, self.pageIndex, + 'p' + self.pageIndex + '_', + self.idCounters, + self.fontCache); - makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { - this.ensureRange(start, start + length); + return partialEvaluator.getTextContent(contentStream, + self.resources); + }); + }, - function ChunkedStreamSubstream() {} - ChunkedStreamSubstream.prototype = Object.create(this); - ChunkedStreamSubstream.prototype.getMissingChunks = function() { - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(this.start / chunkSize); - var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; - var missingChunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!(chunk in this.loadedChunks)) { - missingChunks.push(chunk); - } - } - return missingChunks; - }; - var subStream = new ChunkedStreamSubstream(); - subStream.pos = subStream.start = start; - subStream.end = start + length || this.end; - subStream.dict = dict; - return subStream; + getAnnotationsData: function Page_getAnnotationsData() { + var annotations = this.annotations; + var annotationsData = []; + for (var i = 0, n = annotations.length; i < n; ++i) { + annotationsData.push(annotations[i].getData()); + } + return annotationsData; }, - isStream: true + get annotations() { + var annotations = []; + var annotationRefs = (this.annotationRefs || []); + for (var i = 0, n = annotationRefs.length; i < n; ++i) { + var annotationRef = annotationRefs[i]; + var annotation = Annotation.fromRef(this.xref, annotationRef); + if (annotation) { + annotations.push(annotation); + } + } + return shadow(this, 'annotations', annotations); + } }; - return ChunkedStream; + return Page; })(); -var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { - - function ChunkedStreamManager(length, chunkSize, url, args) { - this.stream = new ChunkedStream(length, chunkSize, this); - this.length = length; - this.chunkSize = chunkSize; - this.url = url; - this.disableAutoFetch = args.disableAutoFetch; - var msgHandler = this.msgHandler = args.msgHandler; - - if (args.chunkedViewerLoading) { - msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); - msgHandler.on('OnDataProgress', this.onProgress.bind(this)); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - msgHandler.send('RequestDataRange', { begin: begin, end: end }); - }; +/** + * The `PDFDocument` holds all the data of the PDF file. Compared to the + * `PDFDoc`, this one doesn't have any job management code. + * Right now there exists one PDFDocument on the main thread + one object + * for each worker. If there is no worker support enabled, there are two + * `PDFDocument` objects on the main thread created. + */ +var PDFDocument = (function PDFDocumentClosure() { + function PDFDocument(pdfManager, arg, password) { + if (isStream(arg)) { + init.call(this, pdfManager, arg, password); + } else if (isArrayBuffer(arg)) { + init.call(this, pdfManager, new Stream(arg), password); } else { + error('PDFDocument: Unknown argument type'); + } + } - var getXhr = function getXhr() { - return new XMLHttpRequest(); - }; - this.networkManager = new NetworkManager(this.url, { - getXhr: getXhr, - httpHeaders: args.httpHeaders, - withCredentials: args.withCredentials - }); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - this.networkManager.requestRange(begin, end, { - onDone: this.onReceiveData.bind(this), - onProgress: this.onProgress.bind(this) - }); - }; - } - - this.currRequestId = 0; - - this.chunksNeededByRequest = {}; - this.requestsByChunk = {}; - this.callbacksByRequest = {}; - - this._loadedStreamCapability = createPromiseCapability(); + function init(pdfManager, stream, password) { + assert(stream.length > 0, 'stream must have data'); + this.pdfManager = pdfManager; + this.stream = stream; + var xref = new XRef(this.stream, password, pdfManager); + this.xref = xref; + } - if (args.initialData) { - this.setInitialData(args.initialData); + function find(stream, needle, limit, backwards) { + var pos = stream.pos; + var end = stream.end; + var strBuf = []; + if (pos + limit > end) { + limit = end - pos; + } + for (var n = 0; n < limit; ++n) { + strBuf.push(String.fromCharCode(stream.getByte())); + } + var str = strBuf.join(''); + stream.pos = pos; + var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle); + if (index == -1) { + return false; /* not found */ } + stream.pos += index; + return true; /* found */ } - ChunkedStreamManager.prototype = { + var DocumentInfoValidators = { + get entries() { + // Lazily build this since all the validation functions below are not + // defined until after this file loads. + return shadow(this, 'entries', { + Title: isString, + Author: isString, + Subject: isString, + Keywords: isString, + Creator: isString, + Producer: isString, + CreationDate: isString, + ModDate: isString, + Trapped: isName + }); + } + }; - setInitialData: function ChunkedStreamManager_setInitialData(data) { - this.stream.onReceiveInitialData(data); - if (this.stream.allChunksLoaded()) { - this._loadedStreamCapability.resolve(this.stream); - } else if (this.msgHandler) { - this.msgHandler.send('DocProgress', { - loaded: data.length, - total: this.length - }); + PDFDocument.prototype = { + parse: function PDFDocument_parse(recoveryMode) { + this.setup(recoveryMode); + try { + // checking if AcroForm is present + this.acroForm = this.catalog.catDict.get('AcroForm'); + if (this.acroForm) { + this.xfa = this.acroForm.get('XFA'); + var fields = this.acroForm.get('Fields'); + if ((!fields || !isArray(fields) || fields.length === 0) && + !this.xfa) { + // no fields and no XFA -- not a form (?) + this.acroForm = null; + } + } + } catch (ex) { + info('Something wrong with AcroForm entry'); + this.acroForm = null; } }, - onLoadedStream: function ChunkedStreamManager_getLoadedStream() { - return this._loadedStreamCapability.promise; - }, - - // Get all the chunks that are not yet loaded and groups them into - // contiguous ranges to load in as few requests as possible - requestAllChunks: function ChunkedStreamManager_requestAllChunks() { - var missingChunks = this.stream.getMissingChunks(); - this.requestChunks(missingChunks); - return this._loadedStreamCapability.promise; - }, - - requestChunks: function ChunkedStreamManager_requestChunks(chunks, - callback) { - var requestId = this.currRequestId++; + get linearization() { + var length = this.stream.length; + var linearization = false; + if (length) { + try { + linearization = new Linearization(this.stream); + if (linearization.length != length) { + linearization = false; + } + } catch (err) { + if (err instanceof MissingDataException) { + throw err; + } - var chunksNeeded; - var i, ii; - this.chunksNeededByRequest[requestId] = chunksNeeded = {}; - for (i = 0, ii = chunks.length; i < ii; i++) { - if (!this.stream.hasChunk(chunks[i])) { - chunksNeeded[chunks[i]] = true; + info('The linearization data is not available ' + + 'or unreadable PDF data is found'); + linearization = false; } } - - if (isEmptyObj(chunksNeeded)) { - if (callback) { - callback(); + // shadow the prototype getter with a data property + return shadow(this, 'linearization', linearization); + }, + get startXRef() { + var stream = this.stream; + var startXRef = 0; + var linearization = this.linearization; + if (linearization) { + // Find end of first obj. + stream.reset(); + if (find(stream, 'endobj', 1024)) { + startXRef = stream.pos + 6; } - return; - } - - this.callbacksByRequest[requestId] = callback; - - var chunksToRequest = []; - for (var chunk in chunksNeeded) { - chunk = chunk | 0; - if (!(chunk in this.requestsByChunk)) { - this.requestsByChunk[chunk] = []; - chunksToRequest.push(chunk); + } else { + // Find startxref by jumping backward from the end of the file. + var step = 1024; + var found = false, pos = stream.end; + while (!found && pos > 0) { + pos -= step - 'startxref'.length; + if (pos < 0) { + pos = 0; + } + stream.pos = pos; + found = find(stream, 'startxref', step, true); + } + if (found) { + stream.skip(9); + var ch; + do { + ch = stream.getByte(); + } while (Lexer.isSpace(ch)); + var str = ''; + while (ch >= 0x20 && ch <= 0x39) { // < '9' + str += String.fromCharCode(ch); + ch = stream.getByte(); + } + startXRef = parseInt(str, 10); + if (isNaN(startXRef)) { + startXRef = 0; + } } - this.requestsByChunk[chunk].push(requestId); - } - - if (!chunksToRequest.length) { - return; - } - - var groupedChunksToRequest = this.groupChunks(chunksToRequest); - - for (i = 0; i < groupedChunksToRequest.length; ++i) { - var groupedChunk = groupedChunksToRequest[i]; - var begin = groupedChunk.beginChunk * this.chunkSize; - var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); - this.sendRequest(begin, end); } + // shadow the prototype getter with a data property + return shadow(this, 'startXRef', startXRef); }, - - getStream: function ChunkedStreamManager_getStream() { - return this.stream; - }, - - // Loads any chunks in the requested range that are not yet loaded - requestRange: function ChunkedStreamManager_requestRange( - begin, end, callback) { - - end = Math.min(end, this.length); - - var beginChunk = this.getBeginChunk(begin); - var endChunk = this.getEndChunk(end); - - var chunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - chunks.push(chunk); + get mainXRefEntriesOffset() { + var mainXRefEntriesOffset = 0; + var linearization = this.linearization; + if (linearization) { + mainXRefEntriesOffset = linearization.mainXRefEntriesOffset; } - - this.requestChunks(chunks, callback); + // shadow the prototype getter with a data property + return shadow(this, 'mainXRefEntriesOffset', mainXRefEntriesOffset); }, - - requestRanges: function ChunkedStreamManager_requestRanges(ranges, - callback) { - ranges = ranges || []; - var chunksToRequest = []; - - for (var i = 0; i < ranges.length; i++) { - var beginChunk = this.getBeginChunk(ranges[i].begin); - var endChunk = this.getEndChunk(ranges[i].end); - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (chunksToRequest.indexOf(chunk) < 0) { - chunksToRequest.push(chunk); + // Find the header, remove leading garbage and setup the stream + // starting from the header. + checkHeader: function PDFDocument_checkHeader() { + var stream = this.stream; + stream.reset(); + if (find(stream, '%PDF-', 1024)) { + // Found the header, trim off any garbage before it. + stream.moveStart(); + // Reading file format version + var MAX_VERSION_LENGTH = 12; + var version = '', ch; + while ((ch = stream.getByte()) > 0x20) { // SPACE + if (version.length >= MAX_VERSION_LENGTH) { + break; } + version += String.fromCharCode(ch); } + // removing "%PDF-"-prefix + this.pdfFormatVersion = version.substring(5); + return; } - - chunksToRequest.sort(function(a, b) { return a - b; }); - this.requestChunks(chunksToRequest, callback); + // May not be a PDF file, continue anyway. }, - - // Groups a sorted array of chunks into as few continguous larger - // chunks as possible - groupChunks: function ChunkedStreamManager_groupChunks(chunks) { - var groupedChunks = []; - var beginChunk = -1; - var prevChunk = -1; - for (var i = 0; i < chunks.length; ++i) { - var chunk = chunks[i]; - - if (beginChunk < 0) { - beginChunk = chunk; - } - - if (prevChunk >= 0 && prevChunk + 1 !== chunk) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: prevChunk + 1 }); - beginChunk = chunk; - } - if (i + 1 === chunks.length) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: chunk + 1 }); - } - - prevChunk = chunk; - } - return groupedChunks; + parseStartXRef: function PDFDocument_parseStartXRef() { + var startXRef = this.startXRef; + this.xref.setStartXRef(startXRef); }, - - onProgress: function ChunkedStreamManager_onProgress(args) { - var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + - args.loaded); - this.msgHandler.send('DocProgress', { - loaded: bytesLoaded, - total: this.length - }); + setup: function PDFDocument_setup(recoveryMode) { + this.xref.parse(recoveryMode); + this.catalog = new Catalog(this.pdfManager, this.xref); }, - - onReceiveData: function ChunkedStreamManager_onReceiveData(args) { - var chunk = args.chunk; - var begin = args.begin; - var end = begin + chunk.byteLength; - - var beginChunk = this.getBeginChunk(begin); - var endChunk = this.getEndChunk(end); - - this.stream.onReceiveData(begin, chunk); - if (this.stream.allChunksLoaded()) { - this._loadedStreamCapability.resolve(this.stream); + get numPages() { + var linearization = this.linearization; + var num = linearization ? linearization.numPages : this.catalog.numPages; + // shadow the prototype getter + return shadow(this, 'numPages', num); + }, + get documentInfo() { + var docInfo = { + PDFFormatVersion: this.pdfFormatVersion, + IsAcroFormPresent: !!this.acroForm, + IsXFAPresent: !!this.xfa + }; + var infoDict; + try { + infoDict = this.xref.trailer.get('Info'); + } catch (err) { + info('The document information dictionary is invalid.'); } - - var loadedRequests = []; - var i, requestId; - for (chunk = beginChunk; chunk < endChunk; ++chunk) { - // The server might return more chunks than requested - var requestIds = this.requestsByChunk[chunk] || []; - delete this.requestsByChunk[chunk]; - - for (i = 0; i < requestIds.length; ++i) { - requestId = requestIds[i]; - var chunksNeeded = this.chunksNeededByRequest[requestId]; - if (chunk in chunksNeeded) { - delete chunksNeeded[chunk]; - } - - if (!isEmptyObj(chunksNeeded)) { - continue; + if (infoDict) { + var validEntries = DocumentInfoValidators.entries; + // Only fill the document info with valid entries from the spec. + for (var key in validEntries) { + if (infoDict.has(key)) { + var value = infoDict.get(key); + // Make sure the value conforms to the spec. + if (validEntries[key](value)) { + docInfo[key] = (typeof value !== 'string' ? + value : stringToPDFString(value)); + } else { + info('Bad value in document info for "' + key + '"'); + } } - - loadedRequests.push(requestId); } } + return shadow(this, 'documentInfo', docInfo); + }, + get fingerprint() { + var xref = this.xref, hash, fileID = ''; - // If there are no pending requests, automatically fetch the next - // unfetched chunk of the PDF - if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { - var nextEmptyChunk; - if (this.stream.numChunksLoaded === 1) { - // This is a special optimization so that after fetching the first - // chunk, rather than fetching the second chunk, we fetch the last - // chunk. - var lastChunk = this.stream.numChunks - 1; - if (!this.stream.hasChunk(lastChunk)) { - nextEmptyChunk = lastChunk; - } - } else { - nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); - } - if (isInt(nextEmptyChunk)) { - this.requestChunks([nextEmptyChunk]); - } + if (xref.trailer.has('ID')) { + hash = stringToBytes(xref.trailer.get('ID')[0]); + } else { + hash = calculateMD5(this.stream.bytes.subarray(0, 100), 0, 100); } - for (i = 0; i < loadedRequests.length; ++i) { - requestId = loadedRequests[i]; - var callback = this.callbacksByRequest[requestId]; - delete this.callbacksByRequest[requestId]; - if (callback) { - callback(); - } + for (var i = 0, n = hash.length; i < n; i++) { + fileID += hash[i].toString(16); } - this.msgHandler.send('DocProgress', { - loaded: this.stream.numChunksLoaded * this.chunkSize, - total: this.length - }); - }, - - onError: function ChunkedStreamManager_onError(err) { - this._loadedStreamCapability.reject(err); + return shadow(this, 'fingerprint', fileID); }, - getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { - var chunk = Math.floor(begin / this.chunkSize); - return chunk; + getPage: function PDFDocument_getPage(pageIndex) { + return this.catalog.getPage(pageIndex); }, - getEndChunk: function ChunkedStreamManager_getEndChunk(end) { - if (end % this.chunkSize === 0) { - return end / this.chunkSize; - } - - // 0 -> 0 - // 1 -> 1 - // 99 -> 1 - // 100 -> 1 - // 101 -> 2 - var chunk = Math.floor((end - 1) / this.chunkSize) + 1; - return chunk; + cleanup: function PDFDocument_cleanup() { + return this.catalog.cleanup(); } }; - return ChunkedStreamManager; + return PDFDocument; })(); -// The maximum number of bytes fetched per range request -var RANGE_CHUNK_SIZE = 65536; - -// TODO(mack): Make use of PDFJS.Util.inherit() when it becomes available -var BasePdfManager = (function BasePdfManagerClosure() { - function BasePdfManager() { - throw new Error('Cannot initialize BaseManagerManager'); +var Name = (function NameClosure() { + function Name(name) { + this.name = name; } - BasePdfManager.prototype = { - onLoadedStream: function BasePdfManager_onLoadedStream() { - throw new NotImplementedException(); - }, + Name.prototype = {}; - ensureDoc: function BasePdfManager_ensureDoc(prop, args) { - return this.ensure(this.pdfDocument, prop, args); - }, + var nameCache = {}; - ensureXRef: function BasePdfManager_ensureXRef(prop, args) { - return this.ensure(this.pdfDocument.xref, prop, args); - }, + Name.get = function Name_get(name) { + var nameValue = nameCache[name]; + return (nameValue ? nameValue : (nameCache[name] = new Name(name))); + }; - ensureCatalog: function BasePdfManager_ensureCatalog(prop, args) { - return this.ensure(this.pdfDocument.catalog, prop, args); - }, + return Name; +})(); - getPage: function BasePdfManager_pagePage(pageIndex) { - return this.pdfDocument.getPage(pageIndex); - }, +var Cmd = (function CmdClosure() { + function Cmd(cmd) { + this.cmd = cmd; + } - cleanup: function BasePdfManager_cleanup() { - return this.pdfDocument.cleanup(); - }, + Cmd.prototype = {}; - ensure: function BasePdfManager_ensure(obj, prop, args) { - return new NotImplementedException(); - }, + var cmdCache = {}; - requestRange: function BasePdfManager_ensure(begin, end) { - return new NotImplementedException(); - }, + Cmd.get = function Cmd_get(cmd) { + var cmdValue = cmdCache[cmd]; + return (cmdValue ? cmdValue : (cmdCache[cmd] = new Cmd(cmd))); + }; - requestLoadedStream: function BasePdfManager_requestLoadedStream() { - return new NotImplementedException(); - }, + return Cmd; +})(); - updatePassword: function BasePdfManager_updatePassword(password) { - this.pdfDocument.xref.password = this.password = password; - if (this._passwordChangedCapability) { - this._passwordChangedCapability.resolve(); - } - }, +var Dict = (function DictClosure() { + var nonSerializable = function nonSerializableClosure() { + return nonSerializable; // creating closure on some variable + }; - passwordChanged: function BasePdfManager_passwordChanged() { - this._passwordChangedCapability = createPromiseCapability(); - return this._passwordChangedCapability.promise; - }, + var GETALL_DICTIONARY_TYPES_WHITELIST = { + 'Background': true, + 'ExtGState': true, + 'Halftone': true, + 'Layout': true, + 'Mask': true, + 'Pagination': true, + 'Printing': true + }; - terminate: function BasePdfManager_terminate() { - return new NotImplementedException(); + function isRecursionAllowedFor(dict) { + if (!isName(dict.Type)) { + return true; } - }; + var dictType = dict.Type.name; + return GETALL_DICTIONARY_TYPES_WHITELIST[dictType] === true; + } - return BasePdfManager; -})(); - -var LocalPdfManager = (function LocalPdfManagerClosure() { - function LocalPdfManager(data, password) { - var stream = new Stream(data); - this.pdfDocument = new PDFDocument(this, stream, password); - this._loadedStreamCapability = createPromiseCapability(); - this._loadedStreamCapability.resolve(stream); + // xref is optional + function Dict(xref) { + // Map should only be used internally, use functions below to access. + this.map = Object.create(null); + this.xref = xref; + this.objId = null; + this.__nonSerializable__ = nonSerializable; // disable cloning of the Dict } - LocalPdfManager.prototype = Object.create(BasePdfManager.prototype); - LocalPdfManager.prototype.constructor = LocalPdfManager; + Dict.prototype = { + assignXref: function Dict_assignXref(newXref) { + this.xref = newXref; + }, - LocalPdfManager.prototype.ensure = - function LocalPdfManager_ensure(obj, prop, args) { - return new Promise(function (resolve, reject) { - try { - var value = obj[prop]; - var result; - if (typeof value === 'function') { - result = value.apply(obj, args); - } else { - result = value; - } - resolve(result); - } catch (e) { - reject(e); + // automatically dereferences Ref objects + get: function Dict_get(key1, key2, key3) { + var value; + var xref = this.xref; + if (typeof (value = this.map[key1]) != 'undefined' || key1 in this.map || + typeof key2 == 'undefined') { + return xref ? xref.fetchIfRef(value) : value; } - }); - }; - - LocalPdfManager.prototype.requestRange = - function LocalPdfManager_requestRange(begin, end) { - return Promise.resolve(); - }; - - LocalPdfManager.prototype.requestLoadedStream = - function LocalPdfManager_requestLoadedStream() { - }; - - LocalPdfManager.prototype.onLoadedStream = - function LocalPdfManager_getLoadedStream() { - return this._loadedStreamCapability.promise; - }; - - LocalPdfManager.prototype.terminate = - function LocalPdfManager_terminate() { - return; - }; - - return LocalPdfManager; -})(); - -var NetworkPdfManager = (function NetworkPdfManagerClosure() { - function NetworkPdfManager(args, msgHandler) { - - this.msgHandler = msgHandler; - - var params = { - msgHandler: msgHandler, - httpHeaders: args.httpHeaders, - withCredentials: args.withCredentials, - chunkedViewerLoading: args.chunkedViewerLoading, - disableAutoFetch: args.disableAutoFetch, - initialData: args.initialData - }; - this.streamManager = new ChunkedStreamManager(args.length, RANGE_CHUNK_SIZE, - args.url, params); - - this.pdfDocument = new PDFDocument(this, this.streamManager.getStream(), - args.password); - } + if (typeof (value = this.map[key2]) != 'undefined' || key2 in this.map || + typeof key3 == 'undefined') { + return xref ? xref.fetchIfRef(value) : value; + } + value = this.map[key3] || null; + return xref ? xref.fetchIfRef(value) : value; + }, - NetworkPdfManager.prototype = Object.create(BasePdfManager.prototype); - NetworkPdfManager.prototype.constructor = NetworkPdfManager; + // Same as get(), but returns a promise and uses fetchIfRefAsync(). + getAsync: function Dict_getAsync(key1, key2, key3) { + var value; + var xref = this.xref; + if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || + typeof key2 === 'undefined') { + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + } + if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || + typeof key3 === 'undefined') { + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + } + value = this.map[key3] || null; + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + }, - NetworkPdfManager.prototype.ensure = - function NetworkPdfManager_ensure(obj, prop, args) { - var pdfManager = this; + // no dereferencing + getRaw: function Dict_getRaw(key) { + return this.map[key]; + }, - return new Promise(function (resolve, reject) { - function ensureHelper() { - try { - var result; - var value = obj[prop]; - if (typeof value === 'function') { - result = value.apply(obj, args); + // creates new map and dereferences all Refs + getAll: function Dict_getAll() { + var all = Object.create(null); + var queue = null; + var key, obj; + for (key in this.map) { + obj = this.get(key); + if (obj instanceof Dict) { + if (isRecursionAllowedFor(obj)) { + (queue || (queue = [])).push({target: all, key: key, obj: obj}); } else { - result = value; - } - resolve(result); - } catch(e) { - if (!(e instanceof MissingDataException)) { - reject(e); - return; + all[key] = this.getRaw(key); } - pdfManager.streamManager.requestRange(e.begin, e.end, ensureHelper); + } else { + all[key] = obj; } } + if (!queue) { + return all; + } - ensureHelper(); - }); - }; + // trying to take cyclic references into the account + var processed = Object.create(null); + while (queue.length > 0) { + var item = queue.shift(); + var itemObj = item.obj; + var objId = itemObj.objId; + if (objId && objId in processed) { + item.target[item.key] = processed[objId]; + continue; + } + var dereferenced = Object.create(null); + for (key in itemObj.map) { + obj = itemObj.get(key); + if (obj instanceof Dict) { + if (isRecursionAllowedFor(obj)) { + queue.push({target: dereferenced, key: key, obj: obj}); + } else { + dereferenced[key] = itemObj.getRaw(key); + } + } else { + dereferenced[key] = obj; + } + } + if (objId) { + processed[objId] = dereferenced; + } + item.target[item.key] = dereferenced; + } + return all; + }, - NetworkPdfManager.prototype.requestRange = - function NetworkPdfManager_requestRange(begin, end) { - return new Promise(function (resolve) { - this.streamManager.requestRange(begin, end, function() { - resolve(); - }); - }.bind(this)); - }; + set: function Dict_set(key, value) { + this.map[key] = value; + }, - NetworkPdfManager.prototype.requestLoadedStream = - function NetworkPdfManager_requestLoadedStream() { - this.streamManager.requestAllChunks(); - }; + has: function Dict_has(key) { + return key in this.map; + }, - NetworkPdfManager.prototype.onLoadedStream = - function NetworkPdfManager_getLoadedStream() { - return this.streamManager.onLoadedStream(); + forEach: function Dict_forEach(callback) { + for (var key in this.map) { + callback(key, this.get(key)); + } + } }; - NetworkPdfManager.prototype.terminate = - function NetworkPdfManager_terminate() { - this.streamManager.networkManager.abortAllRequests(); - }; + Dict.empty = new Dict(null); - return NetworkPdfManager; + return Dict; })(); +var Ref = (function RefClosure() { + function Ref(num, gen) { + this.num = num; + this.gen = gen; + } + Ref.prototype = {}; -var Page = (function PageClosure() { - - var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792]; + return Ref; +})(); - function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) { - this.pdfManager = pdfManager; - this.pageIndex = pageIndex; - this.pageDict = pageDict; - this.xref = xref; - this.ref = ref; - this.fontCache = fontCache; - this.idCounters = { - obj: 0 - }; - this.resourcesPromise = null; +// The reference is identified by number and generation. +// This structure stores only one instance of the reference. +var RefSet = (function RefSetClosure() { + function RefSet() { + this.dict = {}; } - Page.prototype = { - getPageProp: function Page_getPageProp(key) { - return this.pageDict.get(key); + RefSet.prototype = { + has: function RefSet_has(ref) { + return ('R' + ref.num + '.' + ref.gen) in this.dict; }, - getInheritedPageProp: function Page_inheritPageProp(key) { - var dict = this.pageDict; - var value = dict.get(key); - while (value === undefined) { - dict = dict.get('Parent'); - if (!dict) { - break; - } - value = dict.get(key); - } - return value; - }, - - get content() { - return this.getPageProp('Contents'); + put: function RefSet_put(ref) { + this.dict['R' + ref.num + '.' + ref.gen] = true; }, - get resources() { - var value = this.getInheritedPageProp('Resources'); - // For robustness: The spec states that a \Resources entry has to be - // present, but can be empty. Some document omit it still. In this case - // return an empty dictionary: - if (value === undefined) { - value = Dict.empty; - } - return shadow(this, 'resources', value); - }, + remove: function RefSet_remove(ref) { + delete this.dict['R' + ref.num + '.' + ref.gen]; + } + }; - get mediaBox() { - var obj = this.getInheritedPageProp('MediaBox'); - // Reset invalid media box to letter size. - if (!isArray(obj) || obj.length !== 4) { - obj = LETTER_SIZE_MEDIABOX; - } - return shadow(this, 'mediaBox', obj); - }, + return RefSet; +})(); - get view() { - var mediaBox = this.mediaBox; - var cropBox = this.getInheritedPageProp('CropBox'); - if (!isArray(cropBox) || cropBox.length !== 4) { - return shadow(this, 'view', mediaBox); - } +var RefSetCache = (function RefSetCacheClosure() { + function RefSetCache() { + this.dict = Object.create(null); + } - // From the spec, 6th ed., p.963: - // "The crop, bleed, trim, and art boxes should not ordinarily - // extend beyond the boundaries of the media box. If they do, they are - // effectively reduced to their intersection with the media box." - cropBox = Util.intersect(cropBox, mediaBox); - if (!cropBox) { - return shadow(this, 'view', mediaBox); - } - return shadow(this, 'view', cropBox); + RefSetCache.prototype = { + get: function RefSetCache_get(ref) { + return this.dict['R' + ref.num + '.' + ref.gen]; }, - get annotationRefs() { - return shadow(this, 'annotationRefs', - this.getInheritedPageProp('Annots')); + has: function RefSetCache_has(ref) { + return ('R' + ref.num + '.' + ref.gen) in this.dict; }, - get rotate() { - var rotate = this.getInheritedPageProp('Rotate') || 0; - // Normalize rotation so it's a multiple of 90 and between 0 and 270 - if (rotate % 90 !== 0) { - rotate = 0; - } else if (rotate >= 360) { - rotate = rotate % 360; - } else if (rotate < 0) { - // The spec doesn't cover negatives, assume its counterclockwise - // rotation. The following is the other implementation of modulo. - rotate = ((rotate % 360) + 360) % 360; - } - return shadow(this, 'rotate', rotate); + put: function RefSetCache_put(ref, obj) { + this.dict['R' + ref.num + '.' + ref.gen] = obj; }, - getContentStream: function Page_getContentStream() { - var content = this.content; - var stream; - if (isArray(content)) { - // fetching items - var xref = this.xref; - var i, n = content.length; - var streams = []; - for (i = 0; i < n; ++i) { - streams.push(xref.fetchIfRef(content[i])); - } - stream = new StreamsSequenceStream(streams); - } else if (isStream(content)) { - stream = content; - } else { - // replacing non-existent page content with empty one - stream = new NullStream(); - } - return stream; + putAlias: function RefSetCache_putAlias(ref, aliasRef) { + this.dict['R' + ref.num + '.' + ref.gen] = this.get(aliasRef); }, - loadResources: function Page_loadResources(keys) { - if (!this.resourcesPromise) { - // TODO: add async getInheritedPageProp and remove this. - this.resourcesPromise = this.pdfManager.ensure(this, 'resources'); + forEach: function RefSetCache_forEach(fn, thisArg) { + for (var i in this.dict) { + fn.call(thisArg, this.dict[i]); } - return this.resourcesPromise.then(function resourceSuccess() { - var objectLoader = new ObjectLoader(this.resources.map, - keys, - this.xref); - return objectLoader.load(); - }.bind(this)); }, - getOperatorList: function Page_getOperatorList(handler, intent) { - var self = this; - - var pdfManager = this.pdfManager; - var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', - []); - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'ColorSpace', - 'Pattern', - 'Shading', - 'XObject', - 'Font' - // ProcSet - // Properties - ]); - - var partialEvaluator = new PartialEvaluator(pdfManager, this.xref, - handler, this.pageIndex, - 'p' + this.pageIndex + '_', - this.idCounters, - this.fontCache); - - var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]); - var pageListPromise = dataPromises.then(function(data) { - var contentStream = data[0]; - var opList = new OperatorList(intent, handler, self.pageIndex); - - handler.send('StartRenderPage', { - transparency: partialEvaluator.hasBlendModes(self.resources), - pageIndex: self.pageIndex, - intent: intent - }); - return partialEvaluator.getOperatorList(contentStream, self.resources, - opList).then(function () { - return opList; - }); - }); - - var annotationsPromise = pdfManager.ensure(this, 'annotations'); - return Promise.all([pageListPromise, annotationsPromise]).then( - function(datas) { - var pageOpList = datas[0]; - var annotations = datas[1]; + clear: function RefSetCache_clear() { + this.dict = Object.create(null); + } + }; - if (annotations.length === 0) { - pageOpList.flush(true); - return pageOpList; - } + return RefSetCache; +})(); - var annotationsReadyPromise = Annotation.appendToOperatorList( - annotations, pageOpList, pdfManager, partialEvaluator, intent); - return annotationsReadyPromise.then(function () { - pageOpList.flush(true); - return pageOpList; - }); - }); - }, +var Catalog = (function CatalogClosure() { + function Catalog(pdfManager, xref) { + this.pdfManager = pdfManager; + this.xref = xref; + this.catDict = xref.getCatalogObj(); + this.fontCache = new RefSetCache(); + assert(isDict(this.catDict), + 'catalog object is not a dictionary'); - extractTextContent: function Page_extractTextContent() { - var handler = { - on: function nullHandlerOn() {}, - send: function nullHandlerSend() {} - }; + this.pagePromises = []; + } - var self = this; + Catalog.prototype = { + get metadata() { + var streamRef = this.catDict.getRaw('Metadata'); + if (!isRef(streamRef)) { + return shadow(this, 'metadata', null); + } - var pdfManager = this.pdfManager; - var contentStreamPromise = pdfManager.ensure(this, 'getContentStream', - []); + var encryptMetadata = (!this.xref.encrypt ? false : + this.xref.encrypt.encryptMetadata); - var resourcesPromise = this.loadResources([ - 'ExtGState', - 'XObject', - 'Font' - ]); + var stream = this.xref.fetch(streamRef, !encryptMetadata); + var metadata; + if (stream && isDict(stream.dict)) { + var type = stream.dict.get('Type'); + var subtype = stream.dict.get('Subtype'); - var dataPromises = Promise.all([contentStreamPromise, - resourcesPromise]); - return dataPromises.then(function(data) { - var contentStream = data[0]; - var partialEvaluator = new PartialEvaluator(pdfManager, self.xref, - handler, self.pageIndex, - 'p' + self.pageIndex + '_', - self.idCounters, - self.fontCache); + if (isName(type) && isName(subtype) && + type.name === 'Metadata' && subtype.name === 'XML') { + // XXX: This should examine the charset the XML document defines, + // however since there are currently no real means to decode + // arbitrary charsets, let's just hope that the author of the PDF + // was reasonable enough to stick with the XML default charset, + // which is UTF-8. + try { + metadata = stringToUTF8String(bytesToString(stream.getBytes())); + } catch (e) { + info('Skipping invalid metadata.'); + } + } + } - return partialEvaluator.getTextContent(contentStream, - self.resources); - }); + return shadow(this, 'metadata', metadata); }, - - getAnnotationsData: function Page_getAnnotationsData() { - var annotations = this.annotations; - var annotationsData = []; - for (var i = 0, n = annotations.length; i < n; ++i) { - annotationsData.push(annotations[i].getData()); - } - return annotationsData; + get toplevelPagesDict() { + var pagesObj = this.catDict.get('Pages'); + assert(isDict(pagesObj), 'invalid top-level pages dictionary'); + // shadow the prototype getter + return shadow(this, 'toplevelPagesDict', pagesObj); }, - - get annotations() { - var annotations = []; - var annotationRefs = (this.annotationRefs || []); - for (var i = 0, n = annotationRefs.length; i < n; ++i) { - var annotationRef = annotationRefs[i]; - var annotation = Annotation.fromRef(this.xref, annotationRef); - if (annotation) { - annotations.push(annotation); + get documentOutline() { + var obj = null; + try { + obj = this.readDocumentOutline(); + } catch (ex) { + if (ex instanceof MissingDataException) { + throw ex; } + warn('Unable to read document outline'); } - return shadow(this, 'annotations', annotations); - } - }; - - return Page; -})(); - -/** - * The `PDFDocument` holds all the data of the PDF file. Compared to the - * `PDFDoc`, this one doesn't have any job management code. - * Right now there exists one PDFDocument on the main thread + one object - * for each worker. If there is no worker support enabled, there are two - * `PDFDocument` objects on the main thread created. - */ -var PDFDocument = (function PDFDocumentClosure() { - function PDFDocument(pdfManager, arg, password) { - if (isStream(arg)) { - init.call(this, pdfManager, arg, password); - } else if (isArrayBuffer(arg)) { - init.call(this, pdfManager, new Stream(arg), password); - } else { - error('PDFDocument: Unknown argument type'); - } - } - - function init(pdfManager, stream, password) { - assert(stream.length > 0, 'stream must have data'); - this.pdfManager = pdfManager; - this.stream = stream; - var xref = new XRef(this.stream, password, pdfManager); - this.xref = xref; - } - - function find(stream, needle, limit, backwards) { - var pos = stream.pos; - var end = stream.end; - var strBuf = []; - if (pos + limit > end) { - limit = end - pos; - } - for (var n = 0; n < limit; ++n) { - strBuf.push(String.fromCharCode(stream.getByte())); - } - var str = strBuf.join(''); - stream.pos = pos; - var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle); - if (index == -1) { - return false; /* not found */ - } - stream.pos += index; - return true; /* found */ - } - - var DocumentInfoValidators = { - get entries() { - // Lazily build this since all the validation functions below are not - // defined until after this file loads. - return shadow(this, 'entries', { - Title: isString, - Author: isString, - Subject: isString, - Keywords: isString, - Creator: isString, - Producer: isString, - CreationDate: isString, - ModDate: isString, - Trapped: isName - }); - } - }; - - PDFDocument.prototype = { - parse: function PDFDocument_parse(recoveryMode) { - this.setup(recoveryMode); - try { - // checking if AcroForm is present - this.acroForm = this.catalog.catDict.get('AcroForm'); - if (this.acroForm) { - this.xfa = this.acroForm.get('XFA'); - var fields = this.acroForm.get('Fields'); - if ((!fields || !isArray(fields) || fields.length === 0) && - !this.xfa) { - // no fields and no XFA -- not a form (?) - this.acroForm = null; + return shadow(this, 'documentOutline', obj); + }, + readDocumentOutline: function Catalog_readDocumentOutline() { + var xref = this.xref; + var obj = this.catDict.get('Outlines'); + var root = { items: [] }; + if (isDict(obj)) { + obj = obj.getRaw('First'); + var processed = new RefSet(); + if (isRef(obj)) { + var queue = [{obj: obj, parent: root}]; + // to avoid recursion keeping track of the items + // in the processed dictionary + processed.put(obj); + while (queue.length > 0) { + var i = queue.shift(); + var outlineDict = xref.fetchIfRef(i.obj); + if (outlineDict === null) { + continue; + } + if (!outlineDict.has('Title')) { + error('Invalid outline item'); + } + var dest = outlineDict.get('A'); + if (dest) { + dest = dest.get('D'); + } else if (outlineDict.has('Dest')) { + dest = outlineDict.getRaw('Dest'); + if (isName(dest)) { + dest = dest.name; + } + } + var title = outlineDict.get('Title'); + var outlineItem = { + dest: dest, + title: stringToPDFString(title), + color: outlineDict.get('C') || [0, 0, 0], + count: outlineDict.get('Count'), + bold: !!(outlineDict.get('F') & 2), + italic: !!(outlineDict.get('F') & 1), + items: [] + }; + i.parent.items.push(outlineItem); + obj = outlineDict.getRaw('First'); + if (isRef(obj) && !processed.has(obj)) { + queue.push({obj: obj, parent: outlineItem}); + processed.put(obj); + } + obj = outlineDict.getRaw('Next'); + if (isRef(obj) && !processed.has(obj)) { + queue.push({obj: obj, parent: i.parent}); + processed.put(obj); + } } } - } catch (ex) { - info('Something wrong with AcroForm entry'); - this.acroForm = null; } + return (root.items.length > 0 ? root.items : null); + }, + get numPages() { + var obj = this.toplevelPagesDict.get('Count'); + assert( + isInt(obj), + 'page count in top level pages object is not an integer' + ); + // shadow the prototype getter + return shadow(this, 'num', obj); }, + get destinations() { + function fetchDestination(dest) { + return isDict(dest) ? dest.get('D') : dest; + } - get linearization() { - var length = this.stream.length; - var linearization = false; - if (length) { - try { - linearization = new Linearization(this.stream); - if (linearization.length != length) { - linearization = false; + var xref = this.xref; + var dests = {}, nameTreeRef, nameDictionaryRef; + var obj = this.catDict.get('Names'); + if (obj && obj.has('Dests')) { + nameTreeRef = obj.getRaw('Dests'); + } else if (this.catDict.has('Dests')) { + nameDictionaryRef = this.catDict.get('Dests'); + } + + if (nameDictionaryRef) { + // reading simple destination dictionary + obj = nameDictionaryRef; + obj.forEach(function catalogForEach(key, value) { + if (!value) { + return; } - } catch (err) { - if (err instanceof MissingDataException) { - throw err; + dests[key] = fetchDestination(value); + }); + } + if (nameTreeRef) { + var nameTree = new NameTree(nameTreeRef, xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; } - - info('The linearization data is not available ' + - 'or unreadable PDF data is found'); - linearization = false; + dests[name] = fetchDestination(names[name]); } } - // shadow the prototype getter with a data property - return shadow(this, 'linearization', linearization); + return shadow(this, 'destinations', dests); }, - get startXRef() { - var stream = this.stream; - var startXRef = 0; - var linearization = this.linearization; - if (linearization) { - // Find end of first obj. - stream.reset(); - if (find(stream, 'endobj', 1024)) { - startXRef = stream.pos + 6; - } - } else { - // Find startxref by jumping backward from the end of the file. - var step = 1024; - var found = false, pos = stream.end; - while (!found && pos > 0) { - pos -= step - 'startxref'.length; - if (pos < 0) { - pos = 0; + get attachments() { + var xref = this.xref; + var attachments = null, nameTreeRef; + var obj = this.catDict.get('Names'); + if (obj) { + nameTreeRef = obj.getRaw('EmbeddedFiles'); + } + + if (nameTreeRef) { + var nameTree = new NameTree(nameTreeRef, xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; } - stream.pos = pos; - found = find(stream, 'startxref', step, true); + var fs = new FileSpec(names[name], xref); + if (!attachments) { + attachments = {}; + } + attachments[stringToPDFString(name)] = fs.serializable; } - if (found) { - stream.skip(9); - var ch; - do { - ch = stream.getByte(); - } while (Lexer.isSpace(ch)); - var str = ''; - while (ch >= 0x20 && ch <= 0x39) { // < '9' - str += String.fromCharCode(ch); - ch = stream.getByte(); - } - startXRef = parseInt(str, 10); - if (isNaN(startXRef)) { - startXRef = 0; - } - } - } - // shadow the prototype getter with a data property - return shadow(this, 'startXRef', startXRef); - }, - get mainXRefEntriesOffset() { - var mainXRefEntriesOffset = 0; - var linearization = this.linearization; - if (linearization) { - mainXRefEntriesOffset = linearization.mainXRefEntriesOffset; } - // shadow the prototype getter with a data property - return shadow(this, 'mainXRefEntriesOffset', mainXRefEntriesOffset); + return shadow(this, 'attachments', attachments); }, - // Find the header, remove leading garbage and setup the stream - // starting from the header. - checkHeader: function PDFDocument_checkHeader() { - var stream = this.stream; - stream.reset(); - if (find(stream, '%PDF-', 1024)) { - // Found the header, trim off any garbage before it. - stream.moveStart(); - // Reading file format version - var MAX_VERSION_LENGTH = 12; - var version = '', ch; - while ((ch = stream.getByte()) > 0x20) { // SPACE - if (version.length >= MAX_VERSION_LENGTH) { - break; + get javaScript() { + var xref = this.xref; + var obj = this.catDict.get('Names'); + + var javaScript = []; + if (obj && obj.has('JavaScript')) { + var nameTree = new NameTree(obj.getRaw('JavaScript'), xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; } - version += String.fromCharCode(ch); - } - // removing "%PDF-"-prefix - this.pdfFormatVersion = version.substring(5); - return; - } - // May not be a PDF file, continue anyway. - }, - parseStartXRef: function PDFDocument_parseStartXRef() { - var startXRef = this.startXRef; - this.xref.setStartXRef(startXRef); - }, - setup: function PDFDocument_setup(recoveryMode) { - this.xref.parse(recoveryMode); - this.catalog = new Catalog(this.pdfManager, this.xref); - }, - get numPages() { - var linearization = this.linearization; - var num = linearization ? linearization.numPages : this.catalog.numPages; - // shadow the prototype getter - return shadow(this, 'numPages', num); - }, - get documentInfo() { - var docInfo = { - PDFFormatVersion: this.pdfFormatVersion, - IsAcroFormPresent: !!this.acroForm, - IsXFAPresent: !!this.xfa - }; - var infoDict; - try { - infoDict = this.xref.trailer.get('Info'); - } catch (err) { - info('The document information dictionary is invalid.'); - } - if (infoDict) { - var validEntries = DocumentInfoValidators.entries; - // Only fill the document info with valid entries from the spec. - for (var key in validEntries) { - if (infoDict.has(key)) { - var value = infoDict.get(key); - // Make sure the value conforms to the spec. - if (validEntries[key](value)) { - docInfo[key] = (typeof value !== 'string' ? - value : stringToPDFString(value)); - } else { - info('Bad value in document info for "' + key + '"'); - } + // We don't really use the JavaScript right now. This code is + // defensive so we don't cause errors on document load. + var jsDict = names[name]; + if (!isDict(jsDict)) { + continue; + } + var type = jsDict.get('S'); + if (!isName(type) || type.name !== 'JavaScript') { + continue; + } + var js = jsDict.get('JS'); + if (!isString(js) && !isStream(js)) { + continue; + } + if (isStream(js)) { + js = bytesToString(js.getBytes()); } + javaScript.push(stringToPDFString(js)); } } - return shadow(this, 'documentInfo', docInfo); - }, - get fingerprint() { - var xref = this.xref, hash, fileID = ''; - - if (xref.trailer.has('ID')) { - hash = stringToBytes(xref.trailer.get('ID')[0]); - } else { - hash = calculateMD5(this.stream.bytes.subarray(0, 100), 0, 100); - } - for (var i = 0, n = hash.length; i < n; i++) { - fileID += hash[i].toString(16); + // Append OpenAction actions to javaScript array + var openactionDict = this.catDict.get('OpenAction'); + if (isDict(openactionDict)) { + var objType = openactionDict.get('Type'); + var actionType = openactionDict.get('S'); + var action = openactionDict.get('N'); + var isPrintAction = (isName(objType) && objType.name === 'Action' && + isName(actionType) && actionType.name === 'Named' && + isName(action) && action.name === 'Print'); + + if (isPrintAction) { + javaScript.push('print(true);'); + } } - return shadow(this, 'fingerprint', fileID); + return shadow(this, 'javaScript', javaScript); }, - getPage: function PDFDocument_getPage(pageIndex) { - return this.catalog.getPage(pageIndex); + cleanup: function Catalog_cleanup() { + var promises = []; + this.fontCache.forEach(function (promise) { + promises.push(promise); + }); + return Promise.all(promises).then(function (translatedFonts) { + for (var i = 0, ii = translatedFonts.length; i < ii; i++) { + var font = translatedFonts[i].dict; + delete font.translated; + } + this.fontCache.clear(); + }.bind(this)); }, - cleanup: function PDFDocument_cleanup() { - return this.catalog.cleanup(); - } - }; - - return PDFDocument; -})(); - - - -var Name = (function NameClosure() { - function Name(name) { - this.name = name; - } - - Name.prototype = {}; + getPage: function Catalog_getPage(pageIndex) { + if (!(pageIndex in this.pagePromises)) { + this.pagePromises[pageIndex] = this.getPageDict(pageIndex).then( + function (a) { + var dict = a[0]; + var ref = a[1]; + return new Page(this.pdfManager, this.xref, pageIndex, dict, ref, + this.fontCache); + }.bind(this) + ); + } + return this.pagePromises[pageIndex]; + }, - var nameCache = {}; + getPageDict: function Catalog_getPageDict(pageIndex) { + var capability = createPromiseCapability(); + var nodesToVisit = [this.catDict.getRaw('Pages')]; + var currentPageIndex = 0; + var xref = this.xref; - Name.get = function Name_get(name) { - var nameValue = nameCache[name]; - return (nameValue ? nameValue : (nameCache[name] = new Name(name))); - }; + function next() { + while (nodesToVisit.length) { + var currentNode = nodesToVisit.pop(); - return Name; -})(); + if (isRef(currentNode)) { + xref.fetchAsync(currentNode).then(function (obj) { + if ((isDict(obj, 'Page') || (isDict(obj) && !obj.has('Kids')))) { + if (pageIndex === currentPageIndex) { + capability.resolve([obj, currentNode]); + } else { + currentPageIndex++; + next(); + } + return; + } + nodesToVisit.push(obj); + next(); + }.bind(this), capability.reject.bind(capability)); + return; + } -var Cmd = (function CmdClosure() { - function Cmd(cmd) { - this.cmd = cmd; - } + // must be a child page dictionary + assert( + isDict(currentNode), + 'page dictionary kid reference points to wrong type of object' + ); + var count = currentNode.get('Count'); + // Skip nodes where the page can't be. + if (currentPageIndex + count <= pageIndex) { + currentPageIndex += count; + continue; + } - Cmd.prototype = {}; + var kids = currentNode.get('Kids'); + assert(isArray(kids), 'page dictionary kids object is not an array'); + if (count === kids.length) { + // Nodes that don't have the page have been skipped and this is the + // bottom of the tree which means the page requested must be a + // descendant of this pages node. Ideally we would just resolve the + // promise with the page ref here, but there is the case where more + // pages nodes could link to single a page (see issue 3666 pdf). To + // handle this push it back on the queue so if it is a pages node it + // will be descended into. + nodesToVisit = [kids[pageIndex - currentPageIndex]]; + currentPageIndex = pageIndex; + continue; + } else { + for (var last = kids.length - 1; last >= 0; last--) { + nodesToVisit.push(kids[last]); + } + } + } + capability.reject('Page index ' + pageIndex + ' not found.'); + } + next(); + return capability.promise; + }, - var cmdCache = {}; - - Cmd.get = function Cmd_get(cmd) { - var cmdValue = cmdCache[cmd]; - return (cmdValue ? cmdValue : (cmdCache[cmd] = new Cmd(cmd))); - }; - - return Cmd; -})(); + getPageIndex: function Catalog_getPageIndex(ref) { + // The page tree nodes have the count of all the leaves below them. To get + // how many pages are before we just have to walk up the tree and keep + // adding the count of siblings to the left of the node. + var xref = this.xref; + function pagesBeforeRef(kidRef) { + var total = 0; + var parentRef; + return xref.fetchAsync(kidRef).then(function (node) { + if (!node) { + return null; + } + parentRef = node.getRaw('Parent'); + return node.getAsync('Parent'); + }).then(function (parent) { + if (!parent) { + return null; + } + return parent.getAsync('Kids'); + }).then(function (kids) { + if (!kids) { + return null; + } + var kidPromises = []; + var found = false; + for (var i = 0; i < kids.length; i++) { + var kid = kids[i]; + assert(isRef(kid), 'kids must be a ref'); + if (kid.num == kidRef.num) { + found = true; + break; + } + kidPromises.push(xref.fetchAsync(kid).then(function (kid) { + if (kid.has('Count')) { + var count = kid.get('Count'); + total += count; + } else { // page leaf node + total++; + } + })); + } + if (!found) { + error('kid ref not found in parents kids'); + } + return Promise.all(kidPromises).then(function () { + return [total, parentRef]; + }); + }); + } -var Dict = (function DictClosure() { - var nonSerializable = function nonSerializableClosure() { - return nonSerializable; // creating closure on some variable - }; + var total = 0; + function next(ref) { + return pagesBeforeRef(ref).then(function (args) { + if (!args) { + return total; + } + var count = args[0]; + var parentRef = args[1]; + total += count; + return next(parentRef); + }); + } - var GETALL_DICTIONARY_TYPES_WHITELIST = { - 'Background': true, - 'ExtGState': true, - 'Halftone': true, - 'Layout': true, - 'Mask': true, - 'Pagination': true, - 'Printing': true + return next(ref); + } }; - function isRecursionAllowedFor(dict) { - if (!isName(dict.Type)) { - return true; - } - var dictType = dict.Type.name; - return GETALL_DICTIONARY_TYPES_WHITELIST[dictType] === true; - } + return Catalog; +})(); - // xref is optional - function Dict(xref) { - // Map should only be used internally, use functions below to access. - this.map = Object.create(null); - this.xref = xref; - this.objId = null; - this.__nonSerializable__ = nonSerializable; // disable cloning of the Dict +var XRef = (function XRefClosure() { + function XRef(stream, password) { + this.stream = stream; + this.entries = []; + this.xrefstms = {}; + // prepare the XRef cache + this.cache = []; + this.password = password; + this.stats = { + streamTypes: [], + fontTypes: [] + }; } - Dict.prototype = { - assignXref: function Dict_assignXref(newXref) { - this.xref = newXref; + XRef.prototype = { + setStartXRef: function XRef_setStartXRef(startXRef) { + // Store the starting positions of xref tables as we process them + // so we can recover from missing data errors + this.startXRefQueue = [startXRef]; }, - // automatically dereferences Ref objects - get: function Dict_get(key1, key2, key3) { - var value; - var xref = this.xref; - if (typeof (value = this.map[key1]) != 'undefined' || key1 in this.map || - typeof key2 == 'undefined') { - return xref ? xref.fetchIfRef(value) : value; + parse: function XRef_parse(recoveryMode) { + var trailerDict; + if (!recoveryMode) { + trailerDict = this.readXRef(); + } else { + warn('Indexing all PDF objects'); + trailerDict = this.indexObjects(); } - if (typeof (value = this.map[key2]) != 'undefined' || key2 in this.map || - typeof key3 == 'undefined') { - return xref ? xref.fetchIfRef(value) : value; + trailerDict.assignXref(this); + this.trailer = trailerDict; + var encrypt = trailerDict.get('Encrypt'); + if (encrypt) { + var ids = trailerDict.get('ID'); + var fileId = (ids && ids.length) ? ids[0] : ''; + this.encrypt = new CipherTransformFactory(encrypt, fileId, + this.password); + } + + // get the root dictionary (catalog) object + if (!(this.root = trailerDict.get('Root'))) { + error('Invalid root reference'); } - value = this.map[key3] || null; - return xref ? xref.fetchIfRef(value) : value; }, - // Same as get(), but returns a promise and uses fetchIfRefAsync(). - getAsync: function Dict_getAsync(key1, key2, key3) { - var value; - var xref = this.xref; - if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || - typeof key2 === 'undefined') { - if (xref) { - return xref.fetchIfRefAsync(value); - } - return Promise.resolve(value); + processXRefTable: function XRef_processXRefTable(parser) { + if (!('tableState' in this)) { + // Stores state of the table as we process it so we can resume + // from middle of table in case of missing data error + this.tableState = { + entryNum: 0, + streamPos: parser.lexer.stream.pos, + parserBuf1: parser.buf1, + parserBuf2: parser.buf2 + }; } - if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || - typeof key3 === 'undefined') { - if (xref) { - return xref.fetchIfRefAsync(value); - } - return Promise.resolve(value); + + var obj = this.readXRefTable(parser); + + // Sanity check + if (!isCmd(obj, 'trailer')) { + error('Invalid XRef table: could not find trailer dictionary'); } - value = this.map[key3] || null; - if (xref) { - return xref.fetchIfRefAsync(value); + // Read trailer dictionary, e.g. + // trailer + // << /Size 22 + // /Root 20R + // /Info 10R + // /ID [ <81b14aafa313db63dbd6f981e49f94f4> ] + // >> + // The parser goes through the entire stream << ... >> and provides + // a getter interface for the key-value table + var dict = parser.getObj(); + + // The pdflib PDF generator can generate a nested trailer dictionary + if (!isDict(dict) && dict.dict) { + dict = dict.dict; } - return Promise.resolve(value); - }, + if (!isDict(dict)) { + error('Invalid XRef table: could not parse trailer dictionary'); + } + delete this.tableState; - // no dereferencing - getRaw: function Dict_getRaw(key) { - return this.map[key]; + return dict; }, - // creates new map and dereferences all Refs - getAll: function Dict_getAll() { - var all = Object.create(null); - var queue = null; - var key, obj; - for (key in this.map) { - obj = this.get(key); - if (obj instanceof Dict) { - if (isRecursionAllowedFor(obj)) { - (queue || (queue = [])).push({target: all, key: key, obj: obj}); - } else { - all[key] = this.getRaw(key); + readXRefTable: function XRef_readXRefTable(parser) { + // Example of cross-reference table: + // xref + // 0 1 <-- subsection header (first obj #, obj count) + // 0000000000 65535 f <-- actual object (offset, generation #, f/n) + // 23 2 <-- subsection header ... and so on ... + // 0000025518 00002 n + // 0000025635 00000 n + // trailer + // ... + + var stream = parser.lexer.stream; + var tableState = this.tableState; + stream.pos = tableState.streamPos; + parser.buf1 = tableState.parserBuf1; + parser.buf2 = tableState.parserBuf2; + + // Outer loop is over subsection headers + var obj; + + while (true) { + if (!('firstEntryNum' in tableState) || !('entryCount' in tableState)) { + if (isCmd(obj = parser.getObj(), 'trailer')) { + break; } - } else { - all[key] = obj; + tableState.firstEntryNum = obj; + tableState.entryCount = parser.getObj(); } - } - if (!queue) { - return all; - } - // trying to take cyclic references into the account - var processed = Object.create(null); - while (queue.length > 0) { - var item = queue.shift(); - var itemObj = item.obj; - var objId = itemObj.objId; - if (objId && objId in processed) { - item.target[item.key] = processed[objId]; - continue; - } - var dereferenced = Object.create(null); - for (key in itemObj.map) { - obj = itemObj.get(key); - if (obj instanceof Dict) { - if (isRecursionAllowedFor(obj)) { - queue.push({target: dereferenced, key: key, obj: obj}); - } else { - dereferenced[key] = itemObj.getRaw(key); - } - } else { - dereferenced[key] = obj; - } - } - if (objId) { - processed[objId] = dereferenced; + var first = tableState.firstEntryNum; + var count = tableState.entryCount; + if (!isInt(first) || !isInt(count)) { + error('Invalid XRef table: wrong types in subsection header'); } - item.target[item.key] = dereferenced; - } - return all; - }, - - set: function Dict_set(key, value) { - this.map[key] = value; - }, - - has: function Dict_has(key) { - return key in this.map; - }, - - forEach: function Dict_forEach(callback) { - for (var key in this.map) { - callback(key, this.get(key)); - } - } - }; + // Inner loop is over objects themselves + for (var i = tableState.entryNum; i < count; i++) { + tableState.streamPos = stream.pos; + tableState.entryNum = i; + tableState.parserBuf1 = parser.buf1; + tableState.parserBuf2 = parser.buf2; - Dict.empty = new Dict(null); + var entry = {}; + entry.offset = parser.getObj(); + entry.gen = parser.getObj(); + var type = parser.getObj(); - return Dict; -})(); + if (isCmd(type, 'f')) { + entry.free = true; + } else if (isCmd(type, 'n')) { + entry.uncompressed = true; + } -var Ref = (function RefClosure() { - function Ref(num, gen) { - this.num = num; - this.gen = gen; - } + // Validate entry obj + if (!isInt(entry.offset) || !isInt(entry.gen) || + !(entry.free || entry.uncompressed)) { + console.log(entry.offset, entry.gen, entry.free, + entry.uncompressed); + error('Invalid entry in XRef subsection: ' + first + ', ' + count); + } - Ref.prototype = {}; + if (!this.entries[i + first]) { + this.entries[i + first] = entry; + } + } - return Ref; -})(); + tableState.entryNum = 0; + tableState.streamPos = stream.pos; + tableState.parserBuf1 = parser.buf1; + tableState.parserBuf2 = parser.buf2; + delete tableState.firstEntryNum; + delete tableState.entryCount; + } -// The reference is identified by number and generation. -// This structure stores only one instance of the reference. -var RefSet = (function RefSetClosure() { - function RefSet() { - this.dict = {}; - } + // Per issue 3248: hp scanners generate bad XRef + if (first === 1 && this.entries[1] && this.entries[1].free) { + // shifting the entries + this.entries.shift(); + } - RefSet.prototype = { - has: function RefSet_has(ref) { - return ('R' + ref.num + '.' + ref.gen) in this.dict; + // Sanity check: as per spec, first object must be free + if (this.entries[0] && !this.entries[0].free) { + error('Invalid XRef table: unexpected first object'); + } + return obj; }, - put: function RefSet_put(ref) { - this.dict['R' + ref.num + '.' + ref.gen] = true; - }, + processXRefStream: function XRef_processXRefStream(stream) { + if (!('streamState' in this)) { + // Stores state of the stream as we process it so we can resume + // from middle of stream in case of missing data error + var streamParameters = stream.dict; + var byteWidths = streamParameters.get('W'); + var range = streamParameters.get('Index'); + if (!range) { + range = [0, streamParameters.get('Size')]; + } - remove: function RefSet_remove(ref) { - delete this.dict['R' + ref.num + '.' + ref.gen]; - } - }; + this.streamState = { + entryRanges: range, + byteWidths: byteWidths, + entryNum: 0, + streamPos: stream.pos + }; + } + this.readXRefStream(stream); + delete this.streamState; - return RefSet; -})(); + return stream.dict; + }, -var RefSetCache = (function RefSetCacheClosure() { - function RefSetCache() { - this.dict = Object.create(null); - } + readXRefStream: function XRef_readXRefStream(stream) { + var i, j; + var streamState = this.streamState; + stream.pos = streamState.streamPos; - RefSetCache.prototype = { - get: function RefSetCache_get(ref) { - return this.dict['R' + ref.num + '.' + ref.gen]; - }, + var byteWidths = streamState.byteWidths; + var typeFieldWidth = byteWidths[0]; + var offsetFieldWidth = byteWidths[1]; + var generationFieldWidth = byteWidths[2]; - has: function RefSetCache_has(ref) { - return ('R' + ref.num + '.' + ref.gen) in this.dict; - }, + var entryRanges = streamState.entryRanges; + while (entryRanges.length > 0) { + var first = entryRanges[0]; + var n = entryRanges[1]; - put: function RefSetCache_put(ref, obj) { - this.dict['R' + ref.num + '.' + ref.gen] = obj; - }, + if (!isInt(first) || !isInt(n)) { + error('Invalid XRef range fields: ' + first + ', ' + n); + } + if (!isInt(typeFieldWidth) || !isInt(offsetFieldWidth) || + !isInt(generationFieldWidth)) { + error('Invalid XRef entry fields length: ' + first + ', ' + n); + } + for (i = streamState.entryNum; i < n; ++i) { + streamState.entryNum = i; + streamState.streamPos = stream.pos; - putAlias: function RefSetCache_putAlias(ref, aliasRef) { - this.dict['R' + ref.num + '.' + ref.gen] = this.get(aliasRef); - }, + var type = 0, offset = 0, generation = 0; + for (j = 0; j < typeFieldWidth; ++j) { + type = (type << 8) | stream.getByte(); + } + // if type field is absent, its default value is 1 + if (typeFieldWidth === 0) { + type = 1; + } + for (j = 0; j < offsetFieldWidth; ++j) { + offset = (offset << 8) | stream.getByte(); + } + for (j = 0; j < generationFieldWidth; ++j) { + generation = (generation << 8) | stream.getByte(); + } + var entry = {}; + entry.offset = offset; + entry.gen = generation; + switch (type) { + case 0: + entry.free = true; + break; + case 1: + entry.uncompressed = true; + break; + case 2: + break; + default: + error('Invalid XRef entry type: ' + type); + } + if (!this.entries[first + i]) { + this.entries[first + i] = entry; + } + } - forEach: function RefSetCache_forEach(fn, thisArg) { - for (var i in this.dict) { - fn.call(thisArg, this.dict[i]); + streamState.entryNum = 0; + streamState.streamPos = stream.pos; + entryRanges.splice(0, 2); } }, - clear: function RefSetCache_clear() { - this.dict = Object.create(null); - } - }; - - return RefSetCache; -})(); - -var Catalog = (function CatalogClosure() { - function Catalog(pdfManager, xref) { - this.pdfManager = pdfManager; - this.xref = xref; - this.catDict = xref.getCatalogObj(); - this.fontCache = new RefSetCache(); - assert(isDict(this.catDict), - 'catalog object is not a dictionary'); - - this.pagePromises = []; - } - - Catalog.prototype = { - get metadata() { - var streamRef = this.catDict.getRaw('Metadata'); - if (!isRef(streamRef)) { - return shadow(this, 'metadata', null); + indexObjects: function XRef_indexObjects() { + // Simple scan through the PDF content to find objects, + // trailers and XRef streams. + function readToken(data, offset) { + var token = '', ch = data[offset]; + while (ch !== 13 && ch !== 10) { + if (++offset >= data.length) { + break; + } + token += String.fromCharCode(ch); + ch = data[offset]; + } + return token; } - - var encryptMetadata = (!this.xref.encrypt ? false : - this.xref.encrypt.encryptMetadata); - - var stream = this.xref.fetch(streamRef, !encryptMetadata); - var metadata; - if (stream && isDict(stream.dict)) { - var type = stream.dict.get('Type'); - var subtype = stream.dict.get('Subtype'); - - if (isName(type) && isName(subtype) && - type.name === 'Metadata' && subtype.name === 'XML') { - // XXX: This should examine the charset the XML document defines, - // however since there are currently no real means to decode - // arbitrary charsets, let's just hope that the author of the PDF - // was reasonable enough to stick with the XML default charset, - // which is UTF-8. - try { - metadata = stringToUTF8String(bytesToString(stream.getBytes())); - } catch (e) { - info('Skipping invalid metadata.'); + function skipUntil(data, offset, what) { + var length = what.length, dataLength = data.length; + var skipped = 0; + // finding byte sequence + while (offset < dataLength) { + var i = 0; + while (i < length && data[offset + i] == what[i]) { + ++i; } + if (i >= length) { + break; // sequence found + } + offset++; + skipped++; } + return skipped; } + var trailerBytes = new Uint8Array([116, 114, 97, 105, 108, 101, 114]); + var startxrefBytes = new Uint8Array([115, 116, 97, 114, 116, 120, 114, + 101, 102]); + var endobjBytes = new Uint8Array([101, 110, 100, 111, 98, 106]); + var xrefBytes = new Uint8Array([47, 88, 82, 101, 102]); - return shadow(this, 'metadata', metadata); - }, - get toplevelPagesDict() { - var pagesObj = this.catDict.get('Pages'); - assert(isDict(pagesObj), 'invalid top-level pages dictionary'); - // shadow the prototype getter - return shadow(this, 'toplevelPagesDict', pagesObj); - }, - get documentOutline() { - var obj = null; - try { - obj = this.readDocumentOutline(); - } catch (ex) { - if (ex instanceof MissingDataException) { - throw ex; + var stream = this.stream; + stream.pos = 0; + var buffer = stream.getBytes(); + var position = stream.start, length = buffer.length; + var trailers = [], xrefStms = []; + while (position < length) { + var ch = buffer[position]; + if (ch === 32 || ch === 9 || ch === 13 || ch === 10) { + ++position; + continue; } - warn('Unable to read document outline'); - } - return shadow(this, 'documentOutline', obj); - }, - readDocumentOutline: function Catalog_readDocumentOutline() { - var xref = this.xref; - var obj = this.catDict.get('Outlines'); - var root = { items: [] }; - if (isDict(obj)) { - obj = obj.getRaw('First'); - var processed = new RefSet(); - if (isRef(obj)) { - var queue = [{obj: obj, parent: root}]; - // to avoid recursion keeping track of the items - // in the processed dictionary - processed.put(obj); - while (queue.length > 0) { - var i = queue.shift(); - var outlineDict = xref.fetchIfRef(i.obj); - if (outlineDict === null) { - continue; - } - if (!outlineDict.has('Title')) { - error('Invalid outline item'); - } - var dest = outlineDict.get('A'); - if (dest) { - dest = dest.get('D'); - } else if (outlineDict.has('Dest')) { - dest = outlineDict.getRaw('Dest'); - if (isName(dest)) { - dest = dest.name; - } - } - var title = outlineDict.get('Title'); - var outlineItem = { - dest: dest, - title: stringToPDFString(title), - color: outlineDict.get('C') || [0, 0, 0], - count: outlineDict.get('Count'), - bold: !!(outlineDict.get('F') & 2), - italic: !!(outlineDict.get('F') & 1), - items: [] - }; - i.parent.items.push(outlineItem); - obj = outlineDict.getRaw('First'); - if (isRef(obj) && !processed.has(obj)) { - queue.push({obj: obj, parent: outlineItem}); - processed.put(obj); - } - obj = outlineDict.getRaw('Next'); - if (isRef(obj) && !processed.has(obj)) { - queue.push({obj: obj, parent: i.parent}); - processed.put(obj); + if (ch === 37) { // %-comment + do { + ++position; + if (position >= length) { + break; } - } + ch = buffer[position]; + } while (ch !== 13 && ch !== 10); + continue; } - } - return (root.items.length > 0 ? root.items : null); - }, - get numPages() { - var obj = this.toplevelPagesDict.get('Count'); - assert( - isInt(obj), - 'page count in top level pages object is not an integer' - ); - // shadow the prototype getter - return shadow(this, 'num', obj); - }, - get destinations() { - function fetchDestination(dest) { - return isDict(dest) ? dest.get('D') : dest; - } + var token = readToken(buffer, position); + var m; + if (token === 'xref') { + position += skipUntil(buffer, position, trailerBytes); + trailers.push(position); + position += skipUntil(buffer, position, startxrefBytes); + } else if ((m = /^(\d+)\s+(\d+)\s+obj\b/.exec(token))) { + this.entries[m[1]] = { + offset: position, + gen: m[2] | 0, + uncompressed: true + }; - var xref = this.xref; - var dests = {}, nameTreeRef, nameDictionaryRef; - var obj = this.catDict.get('Names'); - if (obj && obj.has('Dests')) { - nameTreeRef = obj.getRaw('Dests'); - } else if (this.catDict.has('Dests')) { - nameDictionaryRef = this.catDict.get('Dests'); - } + var contentLength = skipUntil(buffer, position, endobjBytes) + 7; + var content = buffer.subarray(position, position + contentLength); - if (nameDictionaryRef) { - // reading simple destination dictionary - obj = nameDictionaryRef; - obj.forEach(function catalogForEach(key, value) { - if (!value) { - return; - } - dests[key] = fetchDestination(value); - }); - } - if (nameTreeRef) { - var nameTree = new NameTree(nameTreeRef, xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; + // checking XRef stream suspect + // (it shall have '/XRef' and next char is not a letter) + var xrefTagOffset = skipUntil(content, 0, xrefBytes); + if (xrefTagOffset < contentLength && + content[xrefTagOffset + 5] < 64) { + xrefStms.push(position); + this.xrefstms[position] = 1; // don't read it recursively } - dests[name] = fetchDestination(names[name]); + + position += contentLength; + } else { + position += token.length + 1; } } - return shadow(this, 'destinations', dests); - }, - get attachments() { - var xref = this.xref; - var attachments = null, nameTreeRef; - var obj = this.catDict.get('Names'); - if (obj) { - nameTreeRef = obj.getRaw('EmbeddedFiles'); + // reading XRef streams + var i, ii; + for (i = 0, ii = xrefStms.length; i < ii; ++i) { + this.startXRefQueue.push(xrefStms[i]); + this.readXRef(/* recoveryMode */ true); } - - if (nameTreeRef) { - var nameTree = new NameTree(nameTreeRef, xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; - } - var fs = new FileSpec(names[name], xref); - if (!attachments) { - attachments = {}; - } - attachments[stringToPDFString(name)] = fs.serializable; + // finding main trailer + var dict; + for (i = 0, ii = trailers.length; i < ii; ++i) { + stream.pos = trailers[i]; + var parser = new Parser(new Lexer(stream), true, this); + var obj = parser.getObj(); + if (!isCmd(obj, 'trailer')) { + continue; + } + // read the trailer dictionary + if (!isDict(dict = parser.getObj())) { + continue; + } + // taking the first one with 'ID' + if (dict.has('ID')) { + return dict; } } - return shadow(this, 'attachments', attachments); + // no tailer with 'ID', taking last one (if exists) + if (dict) { + return dict; + } + // nothing helps + // calling error() would reject worker with an UnknownErrorException. + throw new InvalidPDFException('Invalid PDF structure'); }, - get javaScript() { - var xref = this.xref; - var obj = this.catDict.get('Names'); - var javaScript = []; - if (obj && obj.has('JavaScript')) { - var nameTree = new NameTree(obj.getRaw('JavaScript'), xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; - } - // We don't really use the JavaScript right now. This code is - // defensive so we don't cause errors on document load. - var jsDict = names[name]; - if (!isDict(jsDict)) { - continue; - } - var type = jsDict.get('S'); - if (!isName(type) || type.name !== 'JavaScript') { - continue; - } - var js = jsDict.get('JS'); - if (!isString(js) && !isStream(js)) { - continue; + readXRef: function XRef_readXRef(recoveryMode) { + var stream = this.stream; + + try { + while (this.startXRefQueue.length) { + var startXRef = this.startXRefQueue[0]; + + stream.pos = startXRef + stream.start; + + var parser = new Parser(new Lexer(stream), true, this); + var obj = parser.getObj(); + var dict; + + // Get dictionary + if (isCmd(obj, 'xref')) { + // Parse end-of-file XRef + dict = this.processXRefTable(parser); + if (!this.topDict) { + this.topDict = dict; + } + + // Recursively get other XRefs 'XRefStm', if any + obj = dict.get('XRefStm'); + if (isInt(obj)) { + var pos = obj; + // ignore previously loaded xref streams + // (possible infinite recursion) + if (!(pos in this.xrefstms)) { + this.xrefstms[pos] = 1; + this.startXRefQueue.push(pos); + } + } + } else if (isInt(obj)) { + // Parse in-stream XRef + if (!isInt(parser.getObj()) || + !isCmd(parser.getObj(), 'obj') || + !isStream(obj = parser.getObj())) { + error('Invalid XRef stream'); + } + dict = this.processXRefStream(obj); + if (!this.topDict) { + this.topDict = dict; + } + if (!dict) { + error('Failed to read XRef stream'); + } + } else { + error('Invalid XRef stream header'); } - if (isStream(js)) { - js = bytesToString(js.getBytes()); + + // Recursively get previous dictionary, if any + obj = dict.get('Prev'); + if (isInt(obj)) { + this.startXRefQueue.push(obj); + } else if (isRef(obj)) { + // The spec says Prev must not be a reference, i.e. "/Prev NNN" + // This is a fallback for non-compliant PDFs, i.e. "/Prev NNN 0 R" + this.startXRefQueue.push(obj.num); } - javaScript.push(stringToPDFString(js)); + + this.startXRefQueue.shift(); } - } - // Append OpenAction actions to javaScript array - var openactionDict = this.catDict.get('OpenAction'); - if (isDict(openactionDict)) { - var objType = openactionDict.get('Type'); - var actionType = openactionDict.get('S'); - var action = openactionDict.get('N'); - var isPrintAction = (isName(objType) && objType.name === 'Action' && - isName(actionType) && actionType.name === 'Named' && - isName(action) && action.name === 'Print'); - - if (isPrintAction) { - javaScript.push('print(true);'); + return this.topDict; + } catch (e) { + if (e instanceof MissingDataException) { + throw e; } + info('(while reading XRef): ' + e); } - return shadow(this, 'javaScript', javaScript); + if (recoveryMode) { + return; + } + throw new XRefParseException(); }, - cleanup: function Catalog_cleanup() { - var promises = []; - this.fontCache.forEach(function (promise) { - promises.push(promise); - }); - return Promise.all(promises).then(function (translatedFonts) { - for (var i = 0, ii = translatedFonts.length; i < ii; i++) { - var font = translatedFonts[i].dict; - delete font.translated; - } - this.fontCache.clear(); - }.bind(this)); + getEntry: function XRef_getEntry(i) { + var xrefEntry = this.entries[i]; + if (xrefEntry && !xrefEntry.free && xrefEntry.offset) { + return xrefEntry; + } + return null; }, - getPage: function Catalog_getPage(pageIndex) { - if (!(pageIndex in this.pagePromises)) { - this.pagePromises[pageIndex] = this.getPageDict(pageIndex).then( - function (a) { - var dict = a[0]; - var ref = a[1]; - return new Page(this.pdfManager, this.xref, pageIndex, dict, ref, - this.fontCache); - }.bind(this) - ); + fetchIfRef: function XRef_fetchIfRef(obj) { + if (!isRef(obj)) { + return obj; } - return this.pagePromises[pageIndex]; + return this.fetch(obj); }, - getPageDict: function Catalog_getPageDict(pageIndex) { - var capability = createPromiseCapability(); - var nodesToVisit = [this.catDict.getRaw('Pages')]; - var currentPageIndex = 0; - var xref = this.xref; + fetch: function XRef_fetch(ref, suppressEncryption) { + assert(isRef(ref), 'ref object is not a reference'); + var num = ref.num; + if (num in this.cache) { + var cacheEntry = this.cache[num]; + return cacheEntry; + } - function next() { - while (nodesToVisit.length) { - var currentNode = nodesToVisit.pop(); + var xrefEntry = this.getEntry(num); - if (isRef(currentNode)) { - xref.fetchAsync(currentNode).then(function (obj) { - if ((isDict(obj, 'Page') || (isDict(obj) && !obj.has('Kids')))) { - if (pageIndex === currentPageIndex) { - capability.resolve([obj, currentNode]); - } else { - currentPageIndex++; - next(); - } - return; - } - nodesToVisit.push(obj); - next(); - }.bind(this), capability.reject.bind(capability)); - return; - } + // the referenced entry can be free + if (xrefEntry === null) { + return (this.cache[num] = null); + } - // must be a child page dictionary - assert( - isDict(currentNode), - 'page dictionary kid reference points to wrong type of object' - ); - var count = currentNode.get('Count'); - // Skip nodes where the page can't be. - if (currentPageIndex + count <= pageIndex) { - currentPageIndex += count; - continue; - } + if (xrefEntry.uncompressed) { + xrefEntry = this.fetchUncompressed(ref, xrefEntry, suppressEncryption); + } else { + xrefEntry = this.fetchCompressed(xrefEntry, suppressEncryption); + } + if (isDict(xrefEntry)){ + xrefEntry.objId = 'R' + ref.num + '.' + ref.gen; + } else if (isStream(xrefEntry)) { + xrefEntry.dict.objId = 'R' + ref.num + '.' + ref.gen; + } + return xrefEntry; + }, - var kids = currentNode.get('Kids'); - assert(isArray(kids), 'page dictionary kids object is not an array'); - if (count === kids.length) { - // Nodes that don't have the page have been skipped and this is the - // bottom of the tree which means the page requested must be a - // descendant of this pages node. Ideally we would just resolve the - // promise with the page ref here, but there is the case where more - // pages nodes could link to single a page (see issue 3666 pdf). To - // handle this push it back on the queue so if it is a pages node it - // will be descended into. - nodesToVisit = [kids[pageIndex - currentPageIndex]]; - currentPageIndex = pageIndex; - continue; - } else { - for (var last = kids.length - 1; last >= 0; last--) { - nodesToVisit.push(kids[last]); - } + fetchUncompressed: function XRef_fetchUncompressed(ref, xrefEntry, + suppressEncryption) { + var gen = ref.gen; + var num = ref.num; + if (xrefEntry.gen !== gen) { + error('inconsistent generation in XRef'); + } + var stream = this.stream.makeSubStream(xrefEntry.offset + + this.stream.start); + var parser = new Parser(new Lexer(stream), true, this); + var obj1 = parser.getObj(); + var obj2 = parser.getObj(); + var obj3 = parser.getObj(); + if (!isInt(obj1) || parseInt(obj1, 10) !== num || + !isInt(obj2) || parseInt(obj2, 10) !== gen || + !isCmd(obj3)) { + error('bad XRef entry'); + } + if (!isCmd(obj3, 'obj')) { + // some bad PDFs use "obj1234" and really mean 1234 + if (obj3.cmd.indexOf('obj') === 0) { + num = parseInt(obj3.cmd.substring(3), 10); + if (!isNaN(num)) { + return num; } } - capability.reject('Page index ' + pageIndex + ' not found.'); + error('bad XRef entry'); } - next(); - return capability.promise; + if (this.encrypt && !suppressEncryption) { + try { + xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, + gen)); + } catch (ex) { + // Almost all streams must be encrypted, but sometimes + // they are not, probably due to some broken generators. + // Retrying without encryption... + return this.fetch(ref, true); + } + } else { + xrefEntry = parser.getObj(); + } + if (!isStream(xrefEntry)) { + this.cache[num] = xrefEntry; + } + return xrefEntry; }, - getPageIndex: function Catalog_getPageIndex(ref) { - // The page tree nodes have the count of all the leaves below them. To get - // how many pages are before we just have to walk up the tree and keep - // adding the count of siblings to the left of the node. - var xref = this.xref; - function pagesBeforeRef(kidRef) { - var total = 0; - var parentRef; - return xref.fetchAsync(kidRef).then(function (node) { - if (!node) { - return null; - } - parentRef = node.getRaw('Parent'); - return node.getAsync('Parent'); - }).then(function (parent) { - if (!parent) { - return null; - } - return parent.getAsync('Kids'); - }).then(function (kids) { - if (!kids) { - return null; - } - var kidPromises = []; - var found = false; - for (var i = 0; i < kids.length; i++) { - var kid = kids[i]; - assert(isRef(kid), 'kids must be a ref'); - if (kid.num == kidRef.num) { - found = true; - break; - } - kidPromises.push(xref.fetchAsync(kid).then(function (kid) { - if (kid.has('Count')) { - var count = kid.get('Count'); - total += count; - } else { // page leaf node - total++; - } - })); - } - if (!found) { - error('kid ref not found in parents kids'); - } - return Promise.all(kidPromises).then(function () { - return [total, parentRef]; - }); - }); + fetchCompressed: function XRef_fetchCompressed(xrefEntry, + suppressEncryption) { + var tableOffset = xrefEntry.offset; + var stream = this.fetch(new Ref(tableOffset, 0)); + if (!isStream(stream)) { + error('bad ObjStm stream'); } - - var total = 0; - function next(ref) { - return pagesBeforeRef(ref).then(function (args) { - if (!args) { - return total; - } - var count = args[0]; - var parentRef = args[1]; - total += count; - return next(parentRef); - }); + var first = stream.dict.get('First'); + var n = stream.dict.get('N'); + if (!isInt(first) || !isInt(n)) { + error('invalid first and n parameters for ObjStm stream'); } - - return next(ref); - } - }; - - return Catalog; -})(); - -var XRef = (function XRefClosure() { - function XRef(stream, password) { - this.stream = stream; - this.entries = []; - this.xrefstms = {}; - // prepare the XRef cache - this.cache = []; - this.password = password; - this.stats = { - streamTypes: [], - fontTypes: [] - }; - } - - XRef.prototype = { - setStartXRef: function XRef_setStartXRef(startXRef) { - // Store the starting positions of xref tables as we process them - // so we can recover from missing data errors - this.startXRefQueue = [startXRef]; - }, - - parse: function XRef_parse(recoveryMode) { - var trailerDict; - if (!recoveryMode) { - trailerDict = this.readXRef(); - } else { - warn('Indexing all PDF objects'); - trailerDict = this.indexObjects(); + var parser = new Parser(new Lexer(stream), false, this); + parser.allowStreams = true; + var i, entries = [], num, nums = []; + // read the object numbers to populate cache + for (i = 0; i < n; ++i) { + num = parser.getObj(); + if (!isInt(num)) { + error('invalid object number in the ObjStm stream: ' + num); + } + nums.push(num); + var offset = parser.getObj(); + if (!isInt(offset)) { + error('invalid object offset in the ObjStm stream: ' + offset); + } } - trailerDict.assignXref(this); - this.trailer = trailerDict; - var encrypt = trailerDict.get('Encrypt'); - if (encrypt) { - var ids = trailerDict.get('ID'); - var fileId = (ids && ids.length) ? ids[0] : ''; - this.encrypt = new CipherTransformFactory(encrypt, fileId, - this.password); + // read stream objects for cache + for (i = 0; i < n; ++i) { + entries.push(parser.getObj()); + num = nums[i]; + var entry = this.entries[num]; + if (entry && entry.offset === tableOffset && entry.gen === i) { + this.cache[num] = entries[i]; + } } - - // get the root dictionary (catalog) object - if (!(this.root = trailerDict.get('Root'))) { - error('Invalid root reference'); + xrefEntry = entries[xrefEntry.gen]; + if (xrefEntry === undefined) { + error('bad XRef entry for compressed object'); } + return xrefEntry; }, - processXRefTable: function XRef_processXRefTable(parser) { - if (!('tableState' in this)) { - // Stores state of the table as we process it so we can resume - // from middle of table in case of missing data error - this.tableState = { - entryNum: 0, - streamPos: parser.lexer.stream.pos, - parserBuf1: parser.buf1, - parserBuf2: parser.buf2 - }; + fetchIfRefAsync: function XRef_fetchIfRefAsync(obj) { + if (!isRef(obj)) { + return Promise.resolve(obj); } + return this.fetchAsync(obj); + }, - var obj = this.readXRefTable(parser); + fetchAsync: function XRef_fetchAsync(ref, suppressEncryption) { + return new Promise(function (resolve, reject) { + var tryFetch = function () { + try { + resolve(this.fetch(ref, suppressEncryption)); + } catch (e) { + if (e instanceof MissingDataException) { + this.stream.manager.requestRange(e.begin, e.end, tryFetch); + return; + } + reject(e); + } + }.bind(this); + tryFetch(); + }.bind(this)); + }, - // Sanity check - if (!isCmd(obj, 'trailer')) { - error('Invalid XRef table: could not find trailer dictionary'); - } - // Read trailer dictionary, e.g. - // trailer - // << /Size 22 - // /Root 20R - // /Info 10R - // /ID [ <81b14aafa313db63dbd6f981e49f94f4> ] - // >> - // The parser goes through the entire stream << ... >> and provides - // a getter interface for the key-value table - var dict = parser.getObj(); + getCatalogObj: function XRef_getCatalogObj() { + return this.root; + } + }; - // The pdflib PDF generator can generate a nested trailer dictionary - if (!isDict(dict) && dict.dict) { - dict = dict.dict; + return XRef; +})(); + +/** + * A NameTree is like a Dict but has some advantageous properties, see the + * spec (7.9.6) for more details. + * TODO: implement all the Dict functions and make this more efficent. + */ +var NameTree = (function NameTreeClosure() { + function NameTree(root, xref) { + this.root = root; + this.xref = xref; + } + + NameTree.prototype = { + getAll: function NameTree_getAll() { + var dict = {}; + if (!this.root) { + return dict; } - if (!isDict(dict)) { - error('Invalid XRef table: could not parse trailer dictionary'); + var xref = this.xref; + // reading name tree + var processed = new RefSet(); + processed.put(this.root); + var queue = [this.root]; + while (queue.length > 0) { + var i, n; + var obj = xref.fetchIfRef(queue.shift()); + if (!isDict(obj)) { + continue; + } + if (obj.has('Kids')) { + var kids = obj.get('Kids'); + for (i = 0, n = kids.length; i < n; i++) { + var kid = kids[i]; + if (processed.has(kid)) { + error('invalid destinations'); + } + queue.push(kid); + processed.put(kid); + } + continue; + } + var names = obj.get('Names'); + if (names) { + for (i = 0, n = names.length; i < n; i += 2) { + dict[names[i]] = xref.fetchIfRef(names[i + 1]); + } + } } - delete this.tableState; - return dict; - }, + } + }; + return NameTree; +})(); - readXRefTable: function XRef_readXRefTable(parser) { - // Example of cross-reference table: - // xref - // 0 1 <-- subsection header (first obj #, obj count) - // 0000000000 65535 f <-- actual object (offset, generation #, f/n) - // 23 2 <-- subsection header ... and so on ... - // 0000025518 00002 n - // 0000025635 00000 n - // trailer - // ... - - var stream = parser.lexer.stream; - var tableState = this.tableState; - stream.pos = tableState.streamPos; - parser.buf1 = tableState.parserBuf1; - parser.buf2 = tableState.parserBuf2; - - // Outer loop is over subsection headers - var obj; +/** + * "A PDF file can refer to the contents of another file by using a File + * Specification (PDF 1.1)", see the spec (7.11) for more details. + * NOTE: Only embedded files are supported (as part of the attachments support) + * TODO: support the 'URL' file system (with caching if !/V), portable + * collections attributes and related files (/RF) + */ +var FileSpec = (function FileSpecClosure() { + function FileSpec(root, xref) { + if (!root || !isDict(root)) { + return; + } + this.xref = xref; + this.root = root; + if (root.has('FS')) { + this.fs = root.get('FS'); + } + this.description = root.has('Desc') ? + stringToPDFString(root.get('Desc')) : + ''; + if (root.has('RF')) { + warn('Related file specifications are not supported'); + } + this.contentAvailable = true; + if (!root.has('EF')) { + this.contentAvailable = false; + warn('Non-embedded file specifications are not supported'); + } + } - while (true) { - if (!('firstEntryNum' in tableState) || !('entryCount' in tableState)) { - if (isCmd(obj = parser.getObj(), 'trailer')) { - break; - } - tableState.firstEntryNum = obj; - tableState.entryCount = parser.getObj(); - } + function pickPlatformItem(dict) { + // Look for the filename in this order: + // UF, F, Unix, Mac, DOS + if (dict.has('UF')) { + return dict.get('UF'); + } else if (dict.has('F')) { + return dict.get('F'); + } else if (dict.has('Unix')) { + return dict.get('Unix'); + } else if (dict.has('Mac')) { + return dict.get('Mac'); + } else if (dict.has('DOS')) { + return dict.get('DOS'); + } else { + return null; + } + } - var first = tableState.firstEntryNum; - var count = tableState.entryCount; - if (!isInt(first) || !isInt(count)) { - error('Invalid XRef table: wrong types in subsection header'); + FileSpec.prototype = { + get filename() { + if (!this._filename && this.root) { + var filename = pickPlatformItem(this.root) || 'unnamed'; + this._filename = stringToPDFString(filename). + replace(/\\\\/g, '\\'). + replace(/\\\//g, '/'). + replace(/\\/g, '/'); + } + return this._filename; + }, + get content() { + if (!this.contentAvailable) { + return null; + } + if (!this.contentRef && this.root) { + this.contentRef = pickPlatformItem(this.root.get('EF')); + } + var content = null; + if (this.contentRef) { + var xref = this.xref; + var fileObj = xref.fetchIfRef(this.contentRef); + if (fileObj && isStream(fileObj)) { + content = fileObj.getBytes(); + } else { + warn('Embedded file specification points to non-existing/invalid ' + + 'content'); } - // Inner loop is over objects themselves - for (var i = tableState.entryNum; i < count; i++) { - tableState.streamPos = stream.pos; - tableState.entryNum = i; - tableState.parserBuf1 = parser.buf1; - tableState.parserBuf2 = parser.buf2; - - var entry = {}; - entry.offset = parser.getObj(); - entry.gen = parser.getObj(); - var type = parser.getObj(); - - if (isCmd(type, 'f')) { - entry.free = true; - } else if (isCmd(type, 'n')) { - entry.uncompressed = true; - } + } else { + warn('Embedded file specification does not have a content'); + } + return content; + }, + get serializable() { + return { + filename: this.filename, + content: this.content + }; + } + }; + return FileSpec; +})(); - // Validate entry obj - if (!isInt(entry.offset) || !isInt(entry.gen) || - !(entry.free || entry.uncompressed)) { - console.log(entry.offset, entry.gen, entry.free, - entry.uncompressed); - error('Invalid entry in XRef subsection: ' + first + ', ' + count); - } +/** + * A helper for loading missing data in object graphs. It traverses the graph + * depth first and queues up any objects that have missing data. Once it has + * has traversed as many objects that are available it attempts to bundle the + * missing data requests and then resume from the nodes that weren't ready. + * + * NOTE: It provides protection from circular references by keeping track of + * of loaded references. However, you must be careful not to load any graphs + * that have references to the catalog or other pages since that will cause the + * entire PDF document object graph to be traversed. + */ +var ObjectLoader = (function() { + function mayHaveChildren(value) { + return isRef(value) || isDict(value) || isArray(value) || isStream(value); + } - if (!this.entries[i + first]) { - this.entries[i + first] = entry; - } + function addChildren(node, nodesToVisit) { + var value; + if (isDict(node) || isStream(node)) { + var map; + if (isDict(node)) { + map = node.map; + } else { + map = node.dict.map; + } + for (var key in map) { + value = map[key]; + if (mayHaveChildren(value)) { + nodesToVisit.push(value); } - - tableState.entryNum = 0; - tableState.streamPos = stream.pos; - tableState.parserBuf1 = parser.buf1; - tableState.parserBuf2 = parser.buf2; - delete tableState.firstEntryNum; - delete tableState.entryCount; } - - // Per issue 3248: hp scanners generate bad XRef - if (first === 1 && this.entries[1] && this.entries[1].free) { - // shifting the entries - this.entries.shift(); + } else if (isArray(node)) { + for (var i = 0, ii = node.length; i < ii; i++) { + value = node[i]; + if (mayHaveChildren(value)) { + nodesToVisit.push(value); + } } + } + } - // Sanity check: as per spec, first object must be free - if (this.entries[0] && !this.entries[0].free) { - error('Invalid XRef table: unexpected first object'); - } - return obj; - }, + function ObjectLoader(obj, keys, xref) { + this.obj = obj; + this.keys = keys; + this.xref = xref; + this.refSet = null; + } - processXRefStream: function XRef_processXRefStream(stream) { - if (!('streamState' in this)) { - // Stores state of the stream as we process it so we can resume - // from middle of stream in case of missing data error - var streamParameters = stream.dict; - var byteWidths = streamParameters.get('W'); - var range = streamParameters.get('Index'); - if (!range) { - range = [0, streamParameters.get('Size')]; - } + ObjectLoader.prototype = { + load: function ObjectLoader_load() { + var keys = this.keys; + this.capability = createPromiseCapability(); + // Don't walk the graph if all the data is already loaded. + if (!(this.xref.stream instanceof ChunkedStream) || + this.xref.stream.getMissingChunks().length === 0) { + this.capability.resolve(); + return this.capability.promise; + } - this.streamState = { - entryRanges: range, - byteWidths: byteWidths, - entryNum: 0, - streamPos: stream.pos - }; + this.refSet = new RefSet(); + // Setup the initial nodes to visit. + var nodesToVisit = []; + for (var i = 0; i < keys.length; i++) { + nodesToVisit.push(this.obj[keys[i]]); } - this.readXRefStream(stream); - delete this.streamState; - return stream.dict; + this.walk(nodesToVisit); + return this.capability.promise; }, - readXRefStream: function XRef_readXRefStream(stream) { - var i, j; - var streamState = this.streamState; - stream.pos = streamState.streamPos; - - var byteWidths = streamState.byteWidths; - var typeFieldWidth = byteWidths[0]; - var offsetFieldWidth = byteWidths[1]; - var generationFieldWidth = byteWidths[2]; - - var entryRanges = streamState.entryRanges; - while (entryRanges.length > 0) { - var first = entryRanges[0]; - var n = entryRanges[1]; + walk: function ObjectLoader_walk(nodesToVisit) { + var nodesToRevisit = []; + var pendingRequests = []; + // DFS walk of the object graph. + while (nodesToVisit.length) { + var currentNode = nodesToVisit.pop(); - if (!isInt(first) || !isInt(n)) { - error('Invalid XRef range fields: ' + first + ', ' + n); - } - if (!isInt(typeFieldWidth) || !isInt(offsetFieldWidth) || - !isInt(generationFieldWidth)) { - error('Invalid XRef entry fields length: ' + first + ', ' + n); - } - for (i = streamState.entryNum; i < n; ++i) { - streamState.entryNum = i; - streamState.streamPos = stream.pos; - - var type = 0, offset = 0, generation = 0; - for (j = 0; j < typeFieldWidth; ++j) { - type = (type << 8) | stream.getByte(); - } - // if type field is absent, its default value is 1 - if (typeFieldWidth === 0) { - type = 1; - } - for (j = 0; j < offsetFieldWidth; ++j) { - offset = (offset << 8) | stream.getByte(); - } - for (j = 0; j < generationFieldWidth; ++j) { - generation = (generation << 8) | stream.getByte(); - } - var entry = {}; - entry.offset = offset; - entry.gen = generation; - switch (type) { - case 0: - entry.free = true; - break; - case 1: - entry.uncompressed = true; - break; - case 2: - break; - default: - error('Invalid XRef entry type: ' + type); - } - if (!this.entries[first + i]) { - this.entries[first + i] = entry; + // Only references or chunked streams can cause missing data exceptions. + if (isRef(currentNode)) { + // Skip nodes that have already been visited. + if (this.refSet.has(currentNode)) { + continue; } - } - - streamState.entryNum = 0; - streamState.streamPos = stream.pos; - entryRanges.splice(0, 2); - } - }, - - indexObjects: function XRef_indexObjects() { - // Simple scan through the PDF content to find objects, - // trailers and XRef streams. - function readToken(data, offset) { - var token = '', ch = data[offset]; - while (ch !== 13 && ch !== 10) { - if (++offset >= data.length) { - break; + try { + var ref = currentNode; + this.refSet.put(ref); + currentNode = this.xref.fetch(currentNode); + } catch (e) { + if (!(e instanceof MissingDataException)) { + throw e; + } + nodesToRevisit.push(currentNode); + pendingRequests.push({ begin: e.begin, end: e.end }); } - token += String.fromCharCode(ch); - ch = data[offset]; } - return token; - } - function skipUntil(data, offset, what) { - var length = what.length, dataLength = data.length; - var skipped = 0; - // finding byte sequence - while (offset < dataLength) { - var i = 0; - while (i < length && data[offset + i] == what[i]) { - ++i; + if (currentNode && currentNode.getBaseStreams) { + var baseStreams = currentNode.getBaseStreams(); + var foundMissingData = false; + for (var i = 0; i < baseStreams.length; i++) { + var stream = baseStreams[i]; + if (stream.getMissingChunks && stream.getMissingChunks().length) { + foundMissingData = true; + pendingRequests.push({ + begin: stream.start, + end: stream.end + }); + } } - if (i >= length) { - break; // sequence found + if (foundMissingData) { + nodesToRevisit.push(currentNode); } - offset++; - skipped++; } - return skipped; + + addChildren(currentNode, nodesToVisit); } - var trailerBytes = new Uint8Array([116, 114, 97, 105, 108, 101, 114]); - var startxrefBytes = new Uint8Array([115, 116, 97, 114, 116, 120, 114, - 101, 102]); - var endobjBytes = new Uint8Array([101, 110, 100, 111, 98, 106]); - var xrefBytes = new Uint8Array([47, 88, 82, 101, 102]); - var stream = this.stream; - stream.pos = 0; - var buffer = stream.getBytes(); - var position = stream.start, length = buffer.length; - var trailers = [], xrefStms = []; - while (position < length) { - var ch = buffer[position]; - if (ch === 32 || ch === 9 || ch === 13 || ch === 10) { - ++position; - continue; - } - if (ch === 37) { // %-comment - do { - ++position; - if (position >= length) { - break; + if (pendingRequests.length) { + this.xref.stream.manager.requestRanges(pendingRequests, + function pendingRequestCallback() { + nodesToVisit = nodesToRevisit; + for (var i = 0; i < nodesToRevisit.length; i++) { + var node = nodesToRevisit[i]; + // Remove any reference nodes from the currrent refset so they + // aren't skipped when we revist them. + if (isRef(node)) { + this.refSet.remove(node); } - ch = buffer[position]; - } while (ch !== 13 && ch !== 10); - continue; - } - var token = readToken(buffer, position); - var m; - if (token === 'xref') { - position += skipUntil(buffer, position, trailerBytes); - trailers.push(position); - position += skipUntil(buffer, position, startxrefBytes); - } else if ((m = /^(\d+)\s+(\d+)\s+obj\b/.exec(token))) { - this.entries[m[1]] = { - offset: position, - gen: m[2] | 0, - uncompressed: true - }; - - var contentLength = skipUntil(buffer, position, endobjBytes) + 7; - var content = buffer.subarray(position, position + contentLength); - - // checking XRef stream suspect - // (it shall have '/XRef' and next char is not a letter) - var xrefTagOffset = skipUntil(content, 0, xrefBytes); - if (xrefTagOffset < contentLength && - content[xrefTagOffset + 5] < 64) { - xrefStms.push(position); - this.xrefstms[position] = 1; // don't read it recursively } - - position += contentLength; - } else { - position += token.length + 1; - } - } - // reading XRef streams - var i, ii; - for (i = 0, ii = xrefStms.length; i < ii; ++i) { - this.startXRefQueue.push(xrefStms[i]); - this.readXRef(/* recoveryMode */ true); - } - // finding main trailer - var dict; - for (i = 0, ii = trailers.length; i < ii; ++i) { - stream.pos = trailers[i]; - var parser = new Parser(new Lexer(stream), true, this); - var obj = parser.getObj(); - if (!isCmd(obj, 'trailer')) { - continue; - } - // read the trailer dictionary - if (!isDict(dict = parser.getObj())) { - continue; - } - // taking the first one with 'ID' - if (dict.has('ID')) { - return dict; - } - } - // no tailer with 'ID', taking last one (if exists) - if (dict) { - return dict; + this.walk(nodesToVisit); + }.bind(this)); + return; } - // nothing helps - // calling error() would reject worker with an UnknownErrorException. - throw new InvalidPDFException('Invalid PDF structure'); - }, - - readXRef: function XRef_readXRef(recoveryMode) { - var stream = this.stream; + // Everything is loaded. + this.refSet = null; + this.capability.resolve(); + } + }; - try { - while (this.startXRefQueue.length) { - var startXRef = this.startXRefQueue[0]; + return ObjectLoader; +})(); - stream.pos = startXRef + stream.start; - var parser = new Parser(new Lexer(stream), true, this); - var obj = parser.getObj(); - var dict; +var ISOAdobeCharset = [ + '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', + 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', + 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', + 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', + 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', + 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', + 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', + 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', + 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', + 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', + 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', + 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', + 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', + 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', + 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', + 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', + 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', + 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', + 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', + 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', + 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', + 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', + 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', + 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', + 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', + 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', + 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', + 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', + 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', + 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', + 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', + 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', + 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', + 'ugrave', 'yacute', 'ydieresis', 'zcaron' +]; - // Get dictionary - if (isCmd(obj, 'xref')) { - // Parse end-of-file XRef - dict = this.processXRefTable(parser); - if (!this.topDict) { - this.topDict = dict; - } - - // Recursively get other XRefs 'XRefStm', if any - obj = dict.get('XRefStm'); - if (isInt(obj)) { - var pos = obj; - // ignore previously loaded xref streams - // (possible infinite recursion) - if (!(pos in this.xrefstms)) { - this.xrefstms[pos] = 1; - this.startXRefQueue.push(pos); - } - } - } else if (isInt(obj)) { - // Parse in-stream XRef - if (!isInt(parser.getObj()) || - !isCmd(parser.getObj(), 'obj') || - !isStream(obj = parser.getObj())) { - error('Invalid XRef stream'); - } - dict = this.processXRefStream(obj); - if (!this.topDict) { - this.topDict = dict; - } - if (!dict) { - error('Failed to read XRef stream'); - } - } else { - error('Invalid XRef stream header'); - } - - // Recursively get previous dictionary, if any - obj = dict.get('Prev'); - if (isInt(obj)) { - this.startXRefQueue.push(obj); - } else if (isRef(obj)) { - // The spec says Prev must not be a reference, i.e. "/Prev NNN" - // This is a fallback for non-compliant PDFs, i.e. "/Prev NNN 0 R" - this.startXRefQueue.push(obj.num); - } - - this.startXRefQueue.shift(); - } - - return this.topDict; - } catch (e) { - if (e instanceof MissingDataException) { - throw e; - } - info('(while reading XRef): ' + e); - } - - if (recoveryMode) { - return; - } - throw new XRefParseException(); - }, - - getEntry: function XRef_getEntry(i) { - var xrefEntry = this.entries[i]; - if (xrefEntry && !xrefEntry.free && xrefEntry.offset) { - return xrefEntry; - } - return null; - }, - - fetchIfRef: function XRef_fetchIfRef(obj) { - if (!isRef(obj)) { - return obj; - } - return this.fetch(obj); - }, - - fetch: function XRef_fetch(ref, suppressEncryption) { - assert(isRef(ref), 'ref object is not a reference'); - var num = ref.num; - if (num in this.cache) { - var cacheEntry = this.cache[num]; - return cacheEntry; - } - - var xrefEntry = this.getEntry(num); - - // the referenced entry can be free - if (xrefEntry === null) { - return (this.cache[num] = null); - } +var ExpertCharset = [ + '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', + 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', + 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', + 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', + 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', + 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', + 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', + 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', + 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', + 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', + 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', + 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', + 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', + 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', + 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', + 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', + 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', + 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', + 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', + 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', + 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', + 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', + 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', + 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', + 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', + 'Ydieresissmall' +]; - if (xrefEntry.uncompressed) { - xrefEntry = this.fetchUncompressed(ref, xrefEntry, suppressEncryption); - } else { - xrefEntry = this.fetchCompressed(xrefEntry, suppressEncryption); - } - if (isDict(xrefEntry)){ - xrefEntry.objId = 'R' + ref.num + '.' + ref.gen; - } else if (isStream(xrefEntry)) { - xrefEntry.dict.objId = 'R' + ref.num + '.' + ref.gen; - } - return xrefEntry; - }, - - fetchUncompressed: function XRef_fetchUncompressed(ref, xrefEntry, - suppressEncryption) { - var gen = ref.gen; - var num = ref.num; - if (xrefEntry.gen !== gen) { - error('inconsistent generation in XRef'); - } - var stream = this.stream.makeSubStream(xrefEntry.offset + - this.stream.start); - var parser = new Parser(new Lexer(stream), true, this); - var obj1 = parser.getObj(); - var obj2 = parser.getObj(); - var obj3 = parser.getObj(); - if (!isInt(obj1) || parseInt(obj1, 10) !== num || - !isInt(obj2) || parseInt(obj2, 10) !== gen || - !isCmd(obj3)) { - error('bad XRef entry'); - } - if (!isCmd(obj3, 'obj')) { - // some bad PDFs use "obj1234" and really mean 1234 - if (obj3.cmd.indexOf('obj') === 0) { - num = parseInt(obj3.cmd.substring(3), 10); - if (!isNaN(num)) { - return num; - } - } - error('bad XRef entry'); - } - if (this.encrypt && !suppressEncryption) { - try { - xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, - gen)); - } catch (ex) { - // Almost all streams must be encrypted, but sometimes - // they are not, probably due to some broken generators. - // Retrying without encryption... - return this.fetch(ref, true); - } - } else { - xrefEntry = parser.getObj(); - } - if (!isStream(xrefEntry)) { - this.cache[num] = xrefEntry; - } - return xrefEntry; - }, - - fetchCompressed: function XRef_fetchCompressed(xrefEntry, - suppressEncryption) { - var tableOffset = xrefEntry.offset; - var stream = this.fetch(new Ref(tableOffset, 0)); - if (!isStream(stream)) { - error('bad ObjStm stream'); - } - var first = stream.dict.get('First'); - var n = stream.dict.get('N'); - if (!isInt(first) || !isInt(n)) { - error('invalid first and n parameters for ObjStm stream'); - } - var parser = new Parser(new Lexer(stream), false, this); - parser.allowStreams = true; - var i, entries = [], num, nums = []; - // read the object numbers to populate cache - for (i = 0; i < n; ++i) { - num = parser.getObj(); - if (!isInt(num)) { - error('invalid object number in the ObjStm stream: ' + num); - } - nums.push(num); - var offset = parser.getObj(); - if (!isInt(offset)) { - error('invalid object offset in the ObjStm stream: ' + offset); - } - } - // read stream objects for cache - for (i = 0; i < n; ++i) { - entries.push(parser.getObj()); - num = nums[i]; - var entry = this.entries[num]; - if (entry && entry.offset === tableOffset && entry.gen === i) { - this.cache[num] = entries[i]; - } - } - xrefEntry = entries[xrefEntry.gen]; - if (xrefEntry === undefined) { - error('bad XRef entry for compressed object'); - } - return xrefEntry; - }, - - fetchIfRefAsync: function XRef_fetchIfRefAsync(obj) { - if (!isRef(obj)) { - return Promise.resolve(obj); - } - return this.fetchAsync(obj); - }, - - fetchAsync: function XRef_fetchAsync(ref, suppressEncryption) { - return new Promise(function (resolve, reject) { - var tryFetch = function () { - try { - resolve(this.fetch(ref, suppressEncryption)); - } catch (e) { - if (e instanceof MissingDataException) { - this.stream.manager.requestRange(e.begin, e.end, tryFetch); - return; - } - reject(e); - } - }.bind(this); - tryFetch(); - }.bind(this)); - }, - - getCatalogObj: function XRef_getCatalogObj() { - return this.root; - } - }; - - return XRef; -})(); - -/** - * A NameTree is like a Dict but has some advantageous properties, see the - * spec (7.9.6) for more details. - * TODO: implement all the Dict functions and make this more efficent. - */ -var NameTree = (function NameTreeClosure() { - function NameTree(root, xref) { - this.root = root; - this.xref = xref; - } - - NameTree.prototype = { - getAll: function NameTree_getAll() { - var dict = {}; - if (!this.root) { - return dict; - } - var xref = this.xref; - // reading name tree - var processed = new RefSet(); - processed.put(this.root); - var queue = [this.root]; - while (queue.length > 0) { - var i, n; - var obj = xref.fetchIfRef(queue.shift()); - if (!isDict(obj)) { - continue; - } - if (obj.has('Kids')) { - var kids = obj.get('Kids'); - for (i = 0, n = kids.length; i < n; i++) { - var kid = kids[i]; - if (processed.has(kid)) { - error('invalid destinations'); - } - queue.push(kid); - processed.put(kid); - } - continue; - } - var names = obj.get('Names'); - if (names) { - for (i = 0, n = names.length; i < n; i += 2) { - dict[names[i]] = xref.fetchIfRef(names[i + 1]); - } - } - } - return dict; - } - }; - return NameTree; -})(); - -/** - * "A PDF file can refer to the contents of another file by using a File - * Specification (PDF 1.1)", see the spec (7.11) for more details. - * NOTE: Only embedded files are supported (as part of the attachments support) - * TODO: support the 'URL' file system (with caching if !/V), portable - * collections attributes and related files (/RF) - */ -var FileSpec = (function FileSpecClosure() { - function FileSpec(root, xref) { - if (!root || !isDict(root)) { - return; - } - this.xref = xref; - this.root = root; - if (root.has('FS')) { - this.fs = root.get('FS'); - } - this.description = root.has('Desc') ? - stringToPDFString(root.get('Desc')) : - ''; - if (root.has('RF')) { - warn('Related file specifications are not supported'); - } - this.contentAvailable = true; - if (!root.has('EF')) { - this.contentAvailable = false; - warn('Non-embedded file specifications are not supported'); - } - } - - function pickPlatformItem(dict) { - // Look for the filename in this order: - // UF, F, Unix, Mac, DOS - if (dict.has('UF')) { - return dict.get('UF'); - } else if (dict.has('F')) { - return dict.get('F'); - } else if (dict.has('Unix')) { - return dict.get('Unix'); - } else if (dict.has('Mac')) { - return dict.get('Mac'); - } else if (dict.has('DOS')) { - return dict.get('DOS'); - } else { - return null; - } - } - - FileSpec.prototype = { - get filename() { - if (!this._filename && this.root) { - var filename = pickPlatformItem(this.root) || 'unnamed'; - this._filename = stringToPDFString(filename). - replace(/\\\\/g, '\\'). - replace(/\\\//g, '/'). - replace(/\\/g, '/'); - } - return this._filename; - }, - get content() { - if (!this.contentAvailable) { - return null; - } - if (!this.contentRef && this.root) { - this.contentRef = pickPlatformItem(this.root.get('EF')); - } - var content = null; - if (this.contentRef) { - var xref = this.xref; - var fileObj = xref.fetchIfRef(this.contentRef); - if (fileObj && isStream(fileObj)) { - content = fileObj.getBytes(); - } else { - warn('Embedded file specification points to non-existing/invalid ' + - 'content'); - } - } else { - warn('Embedded file specification does not have a content'); - } - return content; - }, - get serializable() { - return { - filename: this.filename, - content: this.content - }; - } - }; - return FileSpec; -})(); - -/** - * A helper for loading missing data in object graphs. It traverses the graph - * depth first and queues up any objects that have missing data. Once it has - * has traversed as many objects that are available it attempts to bundle the - * missing data requests and then resume from the nodes that weren't ready. - * - * NOTE: It provides protection from circular references by keeping track of - * of loaded references. However, you must be careful not to load any graphs - * that have references to the catalog or other pages since that will cause the - * entire PDF document object graph to be traversed. - */ -var ObjectLoader = (function() { - function mayHaveChildren(value) { - return isRef(value) || isDict(value) || isArray(value) || isStream(value); - } - - function addChildren(node, nodesToVisit) { - var value; - if (isDict(node) || isStream(node)) { - var map; - if (isDict(node)) { - map = node.map; - } else { - map = node.dict.map; - } - for (var key in map) { - value = map[key]; - if (mayHaveChildren(value)) { - nodesToVisit.push(value); - } - } - } else if (isArray(node)) { - for (var i = 0, ii = node.length; i < ii; i++) { - value = node[i]; - if (mayHaveChildren(value)) { - nodesToVisit.push(value); - } - } - } - } - - function ObjectLoader(obj, keys, xref) { - this.obj = obj; - this.keys = keys; - this.xref = xref; - this.refSet = null; - } - - ObjectLoader.prototype = { - load: function ObjectLoader_load() { - var keys = this.keys; - this.capability = createPromiseCapability(); - // Don't walk the graph if all the data is already loaded. - if (!(this.xref.stream instanceof ChunkedStream) || - this.xref.stream.getMissingChunks().length === 0) { - this.capability.resolve(); - return this.capability.promise; - } - - this.refSet = new RefSet(); - // Setup the initial nodes to visit. - var nodesToVisit = []; - for (var i = 0; i < keys.length; i++) { - nodesToVisit.push(this.obj[keys[i]]); - } - - this.walk(nodesToVisit); - return this.capability.promise; - }, - - walk: function ObjectLoader_walk(nodesToVisit) { - var nodesToRevisit = []; - var pendingRequests = []; - // DFS walk of the object graph. - while (nodesToVisit.length) { - var currentNode = nodesToVisit.pop(); - - // Only references or chunked streams can cause missing data exceptions. - if (isRef(currentNode)) { - // Skip nodes that have already been visited. - if (this.refSet.has(currentNode)) { - continue; - } - try { - var ref = currentNode; - this.refSet.put(ref); - currentNode = this.xref.fetch(currentNode); - } catch (e) { - if (!(e instanceof MissingDataException)) { - throw e; - } - nodesToRevisit.push(currentNode); - pendingRequests.push({ begin: e.begin, end: e.end }); - } - } - if (currentNode && currentNode.getBaseStreams) { - var baseStreams = currentNode.getBaseStreams(); - var foundMissingData = false; - for (var i = 0; i < baseStreams.length; i++) { - var stream = baseStreams[i]; - if (stream.getMissingChunks && stream.getMissingChunks().length) { - foundMissingData = true; - pendingRequests.push({ - begin: stream.start, - end: stream.end - }); - } - } - if (foundMissingData) { - nodesToRevisit.push(currentNode); - } - } - - addChildren(currentNode, nodesToVisit); - } - - if (pendingRequests.length) { - this.xref.stream.manager.requestRanges(pendingRequests, - function pendingRequestCallback() { - nodesToVisit = nodesToRevisit; - for (var i = 0; i < nodesToRevisit.length; i++) { - var node = nodesToRevisit[i]; - // Remove any reference nodes from the currrent refset so they - // aren't skipped when we revist them. - if (isRef(node)) { - this.refSet.remove(node); - } - } - this.walk(nodesToVisit); - }.bind(this)); - return; - } - // Everything is loaded. - this.refSet = null; - this.capability.resolve(); - } - }; - - return ObjectLoader; -})(); - - -var ISOAdobeCharset = [ - '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', - 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', - 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', - 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', - 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', - 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', - 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', - 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', - 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', - 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', - 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', - 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', - 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', - 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', - 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', - 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', - 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', - 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', - 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', - 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', - 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', - 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', - 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', - 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', - 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', - 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', - 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', - 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', - 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', - 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', - 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', - 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', - 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', - 'ugrave', 'yacute', 'ydieresis', 'zcaron' -]; - -var ExpertCharset = [ - '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', - 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', - 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', - 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', - 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', - 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', - 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', - 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', - 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', - 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', - 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', - 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', - 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', - 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', - 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', - 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', - 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', - 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', - 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', - 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', - 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', - 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', - 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', - 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', - 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', - 'Ydieresissmall' -]; - -var ExpertSubsetCharset = [ - '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', - 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', - 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', - 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', - 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', - 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', - 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', - 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', - 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior' -]; +var ExpertSubsetCharset = [ + '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', + 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', + 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', + 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', + 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', + 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', + 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', + 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', + 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior' +]; @@ -12424,6 +11623,522 @@ var CIDToUnicodeMaps = { +var DEFAULT_ICON_SIZE = 22; // px +var SUPPORTED_TYPES = ['Link', 'Text', 'Widget']; + +var Annotation = (function AnnotationClosure() { + // 12.5.5: Algorithm: Appearance streams + function getTransformMatrix(rect, bbox, matrix) { + var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix); + var minX = bounds[0]; + var minY = bounds[1]; + var maxX = bounds[2]; + var maxY = bounds[3]; + + if (minX === maxX || minY === maxY) { + // From real-life file, bbox was [0, 0, 0, 0]. In this case, + // just apply the transform for rect + return [1, 0, 0, 1, rect[0], rect[1]]; + } + + var xRatio = (rect[2] - rect[0]) / (maxX - minX); + var yRatio = (rect[3] - rect[1]) / (maxY - minY); + return [ + xRatio, + 0, + 0, + yRatio, + rect[0] - minX * xRatio, + rect[1] - minY * yRatio + ]; + } + + function getDefaultAppearance(dict) { + var appearanceState = dict.get('AP'); + if (!isDict(appearanceState)) { + return; + } + + var appearance; + var appearances = appearanceState.get('N'); + if (isDict(appearances)) { + var as = dict.get('AS'); + if (as && appearances.has(as.name)) { + appearance = appearances.get(as.name); + } + } else { + appearance = appearances; + } + return appearance; + } + + function Annotation(params) { + var dict = params.dict; + var data = this.data = {}; + + data.subtype = dict.get('Subtype').name; + var rect = dict.get('Rect') || [0, 0, 0, 0]; + data.rect = Util.normalizeRect(rect); + data.annotationFlags = dict.get('F'); + + var color = dict.get('C'); + if (isArray(color) && color.length === 3) { + // TODO(mack): currently only supporting rgb; need support different + // colorspaces + data.color = color; + } else { + data.color = [0, 0, 0]; + } + + // Some types of annotations have border style dict which has more + // info than the border array + if (dict.has('BS')) { + var borderStyle = dict.get('BS'); + data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1; + } else { + var borderArray = dict.get('Border') || [0, 0, 1]; + data.borderWidth = borderArray[2] || 0; + + // TODO: implement proper support for annotations with line dash patterns. + var dashArray = borderArray[3]; + if (data.borderWidth > 0 && dashArray) { + if (!isArray(dashArray)) { + // Ignore the border if dashArray is not actually an array, + // this is consistent with the behaviour in Adobe Reader. + data.borderWidth = 0; + } else { + var dashArrayLength = dashArray.length; + if (dashArrayLength > 0) { + // According to the PDF specification: the elements in a dashArray + // shall be numbers that are nonnegative and not all equal to zero. + var isInvalid = false; + var numPositive = 0; + for (var i = 0; i < dashArrayLength; i++) { + var validNumber = (+dashArray[i] >= 0); + if (!validNumber) { + isInvalid = true; + break; + } else if (dashArray[i] > 0) { + numPositive++; + } + } + if (isInvalid || numPositive === 0) { + data.borderWidth = 0; + } + } + } + } + } + + this.appearance = getDefaultAppearance(dict); + data.hasAppearance = !!this.appearance; + data.id = params.ref.num; + } + + Annotation.prototype = { + + getData: function Annotation_getData() { + return this.data; + }, + + isInvisible: function Annotation_isInvisible() { + var data = this.data; + if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) { + return false; + } else { + return !!(data && + data.annotationFlags && // Default: not invisible + data.annotationFlags & 0x1); // Invisible + } + }, + + isViewable: function Annotation_isViewable() { + var data = this.data; + return !!(!this.isInvisible() && + data && + (!data.annotationFlags || + !(data.annotationFlags & 0x22)) && // Hidden or NoView + data.rect); // rectangle is necessary + }, + + isPrintable: function Annotation_isPrintable() { + var data = this.data; + return !!(!this.isInvisible() && + data && + data.annotationFlags && // Default: not printable + data.annotationFlags & 0x4 && // Print + !(data.annotationFlags & 0x2) && // Hidden + data.rect); // rectangle is necessary + }, + + loadResources: function Annotation_loadResources(keys) { + return new Promise(function (resolve, reject) { + this.appearance.dict.getAsync('Resources').then(function (resources) { + if (!resources) { + resolve(); + return; + } + var objectLoader = new ObjectLoader(resources.map, + keys, + resources.xref); + objectLoader.load().then(function() { + resolve(resources); + }, reject); + }, reject); + }.bind(this)); + }, + + getOperatorList: function Annotation_getOperatorList(evaluator) { + + if (!this.appearance) { + return Promise.resolve(new OperatorList()); + } + + var data = this.data; + + var appearanceDict = this.appearance.dict; + var resourcesPromise = this.loadResources([ + 'ExtGState', + 'ColorSpace', + 'Pattern', + 'Shading', + 'XObject', + 'Font' + // ProcSet + // Properties + ]); + var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1]; + var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0]; + var transform = getTransformMatrix(data.rect, bbox, matrix); + var self = this; + + return resourcesPromise.then(function(resources) { + var opList = new OperatorList(); + opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]); + return evaluator.getOperatorList(self.appearance, resources, opList). + then(function () { + opList.addOp(OPS.endAnnotation, []); + self.appearance.reset(); + return opList; + }); + }); + } + }; + + Annotation.getConstructor = + function Annotation_getConstructor(subtype, fieldType) { + + if (!subtype) { + return; + } + + // TODO(mack): Implement FreeText annotations + if (subtype === 'Link') { + return LinkAnnotation; + } else if (subtype === 'Text') { + return TextAnnotation; + } else if (subtype === 'Widget') { + if (!fieldType) { + return; + } + + if (fieldType === 'Tx') { + return TextWidgetAnnotation; + } else { + return WidgetAnnotation; + } + } else { + return Annotation; + } + }; + + Annotation.fromRef = function Annotation_fromRef(xref, ref) { + + var dict = xref.fetchIfRef(ref); + if (!isDict(dict)) { + return; + } + + var subtype = dict.get('Subtype'); + subtype = isName(subtype) ? subtype.name : ''; + if (!subtype) { + return; + } + + var fieldType = Util.getInheritableProperty(dict, 'FT'); + fieldType = isName(fieldType) ? fieldType.name : ''; + + var Constructor = Annotation.getConstructor(subtype, fieldType); + if (!Constructor) { + return; + } + + var params = { + dict: dict, + ref: ref, + }; + + var annotation = new Constructor(params); + + if (annotation.isViewable() || annotation.isPrintable()) { + return annotation; + } else { + if (SUPPORTED_TYPES.indexOf(subtype) === -1) { + warn('unimplemented annotation type: ' + subtype); + } + } + }; + + Annotation.appendToOperatorList = function Annotation_appendToOperatorList( + annotations, opList, pdfManager, partialEvaluator, intent) { + + function reject(e) { + annotationsReadyCapability.reject(e); + } + + var annotationsReadyCapability = createPromiseCapability(); + + var annotationPromises = []; + for (var i = 0, n = annotations.length; i < n; ++i) { + if (intent === 'display' && annotations[i].isViewable() || + intent === 'print' && annotations[i].isPrintable()) { + annotationPromises.push( + annotations[i].getOperatorList(partialEvaluator)); + } + } + Promise.all(annotationPromises).then(function(datas) { + opList.addOp(OPS.beginAnnotations, []); + for (var i = 0, n = datas.length; i < n; ++i) { + var annotOpList = datas[i]; + opList.addOpList(annotOpList); + } + opList.addOp(OPS.endAnnotations, []); + annotationsReadyCapability.resolve(); + }, reject); + + return annotationsReadyCapability.promise; + }; + + return Annotation; +})(); +PDFJS.Annotation = Annotation; + + +var WidgetAnnotation = (function WidgetAnnotationClosure() { + + function WidgetAnnotation(params) { + Annotation.call(this, params); + + var dict = params.dict; + var data = this.data; + + data.fieldValue = stringToPDFString( + Util.getInheritableProperty(dict, 'V') || ''); + data.alternativeText = stringToPDFString(dict.get('TU') || ''); + data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || ''; + var fieldType = Util.getInheritableProperty(dict, 'FT'); + data.fieldType = isName(fieldType) ? fieldType.name : ''; + data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0; + this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty; + + // Building the full field name by collecting the field and + // its ancestors 'T' data and joining them using '.'. + var fieldName = []; + var namedItem = dict; + var ref = params.ref; + while (namedItem) { + var parent = namedItem.get('Parent'); + var parentRef = namedItem.getRaw('Parent'); + var name = namedItem.get('T'); + if (name) { + fieldName.unshift(stringToPDFString(name)); + } else { + // The field name is absent, that means more than one field + // with the same name may exist. Replacing the empty name + // with the '`' plus index in the parent's 'Kids' array. + // This is not in the PDF spec but necessary to id the + // the input controls. + var kids = parent.get('Kids'); + var j, jj; + for (j = 0, jj = kids.length; j < jj; j++) { + var kidRef = kids[j]; + if (kidRef.num == ref.num && kidRef.gen == ref.gen) { + break; + } + } + fieldName.unshift('`' + j); + } + namedItem = parent; + ref = parentRef; + } + data.fullName = fieldName.join('.'); + } + + var parent = Annotation.prototype; + Util.inherit(WidgetAnnotation, Annotation, { + isViewable: function WidgetAnnotation_isViewable() { + if (this.data.fieldType === 'Sig') { + warn('unimplemented annotation type: Widget signature'); + return false; + } + + return parent.isViewable.call(this); + } + }); + + return WidgetAnnotation; +})(); + +var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() { + function TextWidgetAnnotation(params) { + WidgetAnnotation.call(this, params); + + this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q'); + this.data.annotationType = AnnotationType.WIDGET; + this.data.hasHtml = !this.data.hasAppearance && !!this.data.fieldValue; + } + + Util.inherit(TextWidgetAnnotation, WidgetAnnotation, { + getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) { + if (this.appearance) { + return Annotation.prototype.getOperatorList.call(this, evaluator); + } + + var opList = new OperatorList(); + var data = this.data; + + // Even if there is an appearance stream, ignore it. This is the + // behaviour used by Adobe Reader. + if (!data.defaultAppearance) { + return Promise.resolve(opList); + } + + var stream = new Stream(stringToBytes(data.defaultAppearance)); + return evaluator.getOperatorList(stream, this.fieldResources, opList). + then(function () { + return opList; + }); + } + }); + + return TextWidgetAnnotation; +})(); + +var InteractiveAnnotation = (function InteractiveAnnotationClosure() { + function InteractiveAnnotation(params) { + Annotation.call(this, params); + + this.data.hasHtml = true; + } + + Util.inherit(InteractiveAnnotation, Annotation, { }); + + return InteractiveAnnotation; +})(); + +var TextAnnotation = (function TextAnnotationClosure() { + function TextAnnotation(params) { + InteractiveAnnotation.call(this, params); + + var dict = params.dict; + var data = this.data; + + var content = dict.get('Contents'); + var title = dict.get('T'); + data.annotationType = AnnotationType.TEXT; + data.content = stringToPDFString(content || ''); + data.title = stringToPDFString(title || ''); + + if (data.hasAppearance) { + data.name = 'NoIcon'; + } else { + data.rect[1] = data.rect[3] - DEFAULT_ICON_SIZE; + data.rect[2] = data.rect[0] + DEFAULT_ICON_SIZE; + data.name = dict.has('Name') ? dict.get('Name').name : 'Note'; + } + + if (dict.has('C')) { + data.hasBgColor = true; + } + } + + Util.inherit(TextAnnotation, InteractiveAnnotation, { }); + + return TextAnnotation; +})(); + +var LinkAnnotation = (function LinkAnnotationClosure() { + function LinkAnnotation(params) { + InteractiveAnnotation.call(this, params); + + var dict = params.dict; + var data = this.data; + data.annotationType = AnnotationType.LINK; + + var action = dict.get('A'); + if (action) { + var linkType = action.get('S').name; + if (linkType === 'URI') { + var url = action.get('URI'); + if (isName(url)) { + // Some bad PDFs do not put parentheses around relative URLs. + url = '/' + url.name; + } else if (url) { + url = addDefaultProtocolToUrl(url); + } + // TODO: pdf spec mentions urls can be relative to a Base + // entry in the dictionary. + if (!isValidUrl(url, false)) { + url = ''; + } + data.url = url; + } else if (linkType === 'GoTo') { + data.dest = action.get('D'); + } else if (linkType === 'GoToR') { + var urlDict = action.get('F'); + if (isDict(urlDict)) { + // We assume that the 'url' is a Filspec dictionary + // and fetch the url without checking any further + url = urlDict.get('F') || ''; + } + + // TODO: pdf reference says that GoToR + // can also have 'NewWindow' attribute + if (!isValidUrl(url, false)) { + url = ''; + } + data.url = url; + data.dest = action.get('D'); + } else if (linkType === 'Named') { + data.action = action.get('N').name; + } else { + warn('unrecognized link type: ' + linkType); + } + } else if (dict.has('Dest')) { + // simple destination link + var dest = dict.get('Dest'); + data.dest = isName(dest) ? dest.name : dest; + } + } + + // Lets URLs beginning with 'www.' default to using the 'http://' protocol. + function addDefaultProtocolToUrl(url) { + if (url && url.indexOf('www.') === 0) { + return ('http://' + url); + } + return url; + } + + Util.inherit(LinkAnnotation, InteractiveAnnotation, { + hasOperatorList: function LinkAnnotation_hasOperatorList() { + return false; + } + }); + + return LinkAnnotation; +})(); + + var PDFFunction = (function PDFFunctionClosure() { var CONSTRUCT_SAMPLED = 0; var CONSTRUCT_INTERPOLATED = 2; diff --git a/package.json b/package.json index 671c60df0..b7daac640 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "pdfjs-dist", - "version": "1.0.391", + "version": "1.0.393", "description": "Generic build of Mozilla's PDF.js library.", "keywords": [ "Mozilla",