[MIG] attachment_preview: Migration to 11.0

[FIX] Lint [FIX] lint and flake [ADD] tests [ADD] tests [ADD] tests [ADD] Tests [ADD] Package python-magic [ADD] Tests [FIX] Lint
2025-12-22 21:32:18 -06:00 · 2018-07-11 14:13:08 +02:00
parent ae0c4ac2e9
commit ce2e7eba67
35 changed files with 2241 additions and 1374 deletions
--- a/attachment_preview/static/lib/ViewerJS/pdf.js
+++ b/attachment_preview/static/lib/ViewerJS/pdf.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
  (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }

-PDFJS.version = '1.0.1040';
-PDFJS.build = '997096f';
+PDFJS.version = '1.1.114';
+PDFJS.build = '3fd44fd';

 (function pdfjsWrapper() {
  // Use strict in our context only - users might not want it
@@ -239,17 +239,10 @@ function warn(msg) {
 // Fatal errors that should trigger the fallback UI and halt execution by
 // throwing an exception.
 function error(msg) {
-  // If multiple arguments were passed, pass them all to the log function.
-  if (arguments.length > 1) {
-    var logArguments = ['Error:'];
-    logArguments.push.apply(logArguments, arguments);
-    console.log.apply(console, logArguments);
-    // Join the arguments into a single string for the lines below.
-    msg = [].join.call(arguments, ' ');
-  } else {
+  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) {
    console.log('Error: ' + msg);
+    console.log(backtrace());
  }
-  console.log(backtrace());
  UnsupportedManager.notify(UNSUPPORTED_FEATURES.unknown);
  throw new Error(msg);
 }
@@ -341,6 +334,7 @@ function isValidUrl(url, allowRelative) {
    case 'https':
    case 'ftp':
    case 'mailto':
+    case 'tel':
      return true;
    default:
      return false;
@@ -355,6 +349,7 @@ function shadow(obj, prop, value) {
                                     writable: false });
  return value;
 }
+PDFJS.shadow = shadow;

 var PasswordResponses = PDFJS.PasswordResponses = {
  NEED_PASSWORD: 1,
@@ -470,6 +465,8 @@ var XRefParseException = (function XRefParseExceptionClosure() {


 function bytesToString(bytes) {
+  assert(bytes !== null && typeof bytes === 'object' &&
+         bytes.length !== undefined, 'Invalid argument for bytesToString');
  var length = bytes.length;
  var MAX_ARGUMENT_COUNT = 8192;
  if (length < MAX_ARGUMENT_COUNT) {
@@ -485,6 +482,7 @@ function bytesToString(bytes) {
 }

 function stringToBytes(str) {
+  assert(typeof str === 'string', 'Invalid argument for stringToBytes');
  var length = str.length;
  var bytes = new Uint8Array(length);
  for (var i = 0; i < length; ++i) {
@@ -1002,10 +1000,6 @@ function isString(v) {
  return typeof v === 'string';
 }

-function isNull(v) {
-  return v === null;
-}
-
 function isName(v) {
  return v instanceof Name;
 }
@@ -1639,7 +1633,7 @@ PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);
 */
 PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;

-/*
+/**
 * By default fonts are converted to OpenType fonts and loaded via font face
 * rules. If disabled, the font will be rendered using a built in font renderer
 * that constructs the glyphs with primitive path commands.
@@ -1694,6 +1688,9 @@ PDFJS.disableStream = (PDFJS.disableStream === undefined ?
 * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
 * will automatically keep fetching more data even if it isn't needed to display
 * the current page. This default behavior can be disabled.
+ *
+ * NOTE: It is also necessary to disable streaming, see above,
+ *       in order for disabling of pre-fetching to work correctly.
 * @var {boolean}
 */
 PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
@@ -1726,6 +1723,14 @@ PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
 PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
                      true : PDFJS.disableWebGL);

+/**
+ * Disables fullscreen support, and by extension Presentation Mode,
+ * in browsers which support the fullscreen API.
+ * @var {boolean}
+ */
+PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?
+                           false : PDFJS.disableFullscreen);
+
 /**
 * Enables CSS only zooming.
 * @var {boolean}
@@ -1745,19 +1750,30 @@ PDFJS.verbosity = (PDFJS.verbosity === undefined ?
                   PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);

 /**
- * The maximum supported canvas size in total pixels e.g. width * height. 
+ * 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);

+/**
+ * Opens external links in a new window if enabled. The default behavior opens
+ * external links in the PDF.js window.
+ * @var {boolean}
+ */
+PDFJS.openExternalLinksInNewWindow = (
+  PDFJS.openExternalLinksInNewWindow === undefined ?
+    false : PDFJS.openExternalLinksInNewWindow);
+
 /**
 * 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 {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
+ *   (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
+ *   use atob() to convert it to a binary string first.
 * @property {Object}     httpHeaders - Basic authentication headers.
 * @property {boolean}    withCredentials - Indicates whether or not cross-site
 *   Access-Control requests should be made using credentials such as cookies
@@ -1766,6 +1782,9 @@ PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
 * @property {TypedArray} initialData - A typed array with the first portion or
 *   all of the pdf data. Used by the extension since some data is already
 *   loaded before the switch to range requests.
+ * @property {number}     length - The PDF file length. It's used for progress
+ *   reports and range requests operations.
+ * @property {PDFDataRangeTransport} range
 */

 /**
@@ -1782,68 +1801,226 @@ PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
 * 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 {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
+ * Can be a url to where a PDF is located, a typed array (Uint8Array)
+ * already populated with data or parameter object.
 *
- * @param {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 {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
+ * if you want to manually serve range requests for data in the PDF.
 *
- * @param {function} passwordCallback is optional. It is used to request a
+ * @param {function} passwordCallback (deprecated) It is used to request a
 * password if wrong or no password was provided. The callback receives two
 * parameters: function that needs to be called with new password and reason
 * (see {PasswordResponses}).
 *
- * @param {function} progressCallback is optional. It is used to be able to
+ * @param {function} progressCallback (deprecated) It is used to be able to
 * monitor the loading progress of the PDF file (necessary to implement e.g.
 * a loading bar). The callback receives an {Object} with the properties:
 * {number} loaded and {number} total.
 *
- * @return {Promise} A promise that is resolved with {@link PDFDocumentProxy}
- *   object.
+ * @return {PDFDocumentLoadingTask}
 */
-PDFJS.getDocument = function getDocument(source,
+PDFJS.getDocument = function getDocument(src,
                                         pdfDataRangeTransport,
                                         passwordCallback,
                                         progressCallback) {
-  var workerInitializedCapability, workerReadyCapability, transport;
+  var task = new PDFDocumentLoadingTask();

-  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');
+  // Support of the obsolete arguments (for compatibility with API v1.0)
+  if (pdfDataRangeTransport) {
+    if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
+      // Not a PDFDataRangeTransport instance, trying to add missing properties.
+      pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
+      pdfDataRangeTransport.length = src.length;
+      pdfDataRangeTransport.initialData = src.initialData;
+    }
+    src = Object.create(src);
+    src.range = pdfDataRangeTransport;
+  }
+  task.onPassword = passwordCallback || null;
+  task.onProgress = progressCallback || null;
+
+  var workerInitializedCapability, transport;
+  var source;
+  if (typeof src === 'string') {
+    source = { url: src };
+  } else if (isArrayBuffer(src)) {
+    source = { data: src };
+  } else if (src instanceof PDFDataRangeTransport) {
+    source = { range: src };
+  } else {
+    if (typeof src !== 'object') {
+      error('Invalid parameter in getDocument, need either Uint8Array, ' +
+        'string or a parameter object');
+    }
+    if (!src.url && !src.data && !src.range) {
+      error('Invalid parameter object: need either .data, .range or .url');
+    }
+
+    source = src;
  }

-  if (!source.url && !source.data) {
-    error('Invalid parameter array, need either .data or .url');
-  }
-
-  // copy/use all keys as is except 'url' -- full path is required
  var params = {};
  for (var key in source) {
    if (key === 'url' && typeof window !== 'undefined') {
+      // The full path is required in the 'url' field.
      params[key] = combineUrl(window.location.href, source[key]);
      continue;
+    } else if (key === 'range') {
+      continue;
+    } else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
+      // Converting string or array-like data to Uint8Array.
+      var pdfBytes = source[key];
+      if (typeof pdfBytes === 'string') {
+        params[key] = stringToBytes(pdfBytes);
+      } else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
+                 !isNaN(pdfBytes.length)) {
+        params[key] = new Uint8Array(pdfBytes);
+      } else {
+        error('Invalid PDF binary data: either typed array, string or ' +
+              'array-like object is expected in the data property.');
+      }
+      continue;
    }
    params[key] = source[key];
  }

  workerInitializedCapability = createPromiseCapability();
-  workerReadyCapability = createPromiseCapability();
-  transport = new WorkerTransport(workerInitializedCapability,
-                                  workerReadyCapability, pdfDataRangeTransport,
-                                  progressCallback);
+  transport = new WorkerTransport(workerInitializedCapability, source.range);
  workerInitializedCapability.promise.then(function transportInitialized() {
-    transport.passwordCallback = passwordCallback;
-    transport.fetchDocument(params);
+    transport.fetchDocument(task, params);
  });
-  return workerReadyCapability.promise;
+
+  return task;
 };

+/**
+ * PDF document loading operation.
+ * @class
+ */
+var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
+  /** @constructs PDFDocumentLoadingTask */
+  function PDFDocumentLoadingTask() {
+    this._capability = createPromiseCapability();
+
+    /**
+     * Callback to request a password if wrong or no password was provided.
+     * The callback receives two parameters: function that needs to be called
+     * with new password and reason (see {PasswordResponses}).
+     */
+    this.onPassword = null;
+
+    /**
+     * Callback to be able to monitor the loading progress of the PDF file
+     * (necessary to implement e.g. a loading bar). The callback receives
+     * an {Object} with the properties: {number} loaded and {number} total.
+     */
+    this.onProgress = null;
+  }
+
+  PDFDocumentLoadingTask.prototype =
+      /** @lends PDFDocumentLoadingTask.prototype */ {
+    /**
+     * @return {Promise}
+     */
+    get promise() {
+      return this._capability.promise;
+    },
+
+    // TODO add cancel or abort method
+
+    /**
+     * Registers callbacks to indicate the document loading completion.
+     *
+     * @param {function} onFulfilled The callback for the loading completion.
+     * @param {function} onRejected The callback for the loading failure.
+     * @return {Promise} A promise that is resolved after the onFulfilled or
+     *                   onRejected callback.
+     */
+    then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
+      return this.promise.then.apply(this.promise, arguments);
+    }
+  };
+
+  return PDFDocumentLoadingTask;
+})();
+
+/**
+ * Abstract class to support range requests file loading.
+ * @class
+ */
+var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
+  /**
+   * @constructs PDFDataRangeTransport
+   * @param {number} length
+   * @param {Uint8Array} initialData
+   */
+  function PDFDataRangeTransport(length, initialData) {
+    this.length = length;
+    this.initialData = initialData;
+
+    this._rangeListeners = [];
+    this._progressListeners = [];
+    this._progressiveReadListeners = [];
+    this._readyCapability = createPromiseCapability();
+  }
+  PDFDataRangeTransport.prototype =
+      /** @lends PDFDataRangeTransport.prototype */ {
+    addRangeListener:
+        function PDFDataRangeTransport_addRangeListener(listener) {
+      this._rangeListeners.push(listener);
+    },
+
+    addProgressListener:
+        function PDFDataRangeTransport_addProgressListener(listener) {
+      this._progressListeners.push(listener);
+    },
+
+    addProgressiveReadListener:
+        function PDFDataRangeTransport_addProgressiveReadListener(listener) {
+      this._progressiveReadListeners.push(listener);
+    },
+
+    onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
+      var listeners = this._rangeListeners;
+      for (var i = 0, n = listeners.length; i < n; ++i) {
+        listeners[i](begin, chunk);
+      }
+    },
+
+    onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
+      this._readyCapability.promise.then(function () {
+        var listeners = this._progressListeners;
+        for (var i = 0, n = listeners.length; i < n; ++i) {
+          listeners[i](loaded);
+        }
+      }.bind(this));
+    },
+
+    onDataProgressiveRead:
+        function PDFDataRangeTransport_onDataProgress(chunk) {
+      this._readyCapability.promise.then(function () {
+        var listeners = this._progressiveReadListeners;
+        for (var i = 0, n = listeners.length; i < n; ++i) {
+          listeners[i](chunk);
+        }
+      }.bind(this));
+    },
+
+    transportReady: function PDFDataRangeTransport_transportReady() {
+      this._readyCapability.resolve();
+    },
+
+    requestDataRange:
+        function PDFDataRangeTransport_requestDataRange(begin, end) {
+      throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
+    }
+  };
+  return PDFDataRangeTransport;
+})();
+
+PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;
+
 /**
 * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
 * properties that can be read synchronously.
@@ -1959,7 +2136,7 @@ var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
      return this.transport.downloadInfoCapability.promise;
    },
    /**
-     * @returns {Promise} A promise this is resolved with current stats about
+     * @return {Promise} A promise this is resolved with current stats about
     * document structures (see {@link PDFDocumentStats}).
     */
    getStats: function PDFDocumentProxy_getStats() {
@@ -2023,12 +2200,12 @@ var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
 *                    (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
+ * @property {function} continueCallback - (deprecated) A function that will be
 *                      called each time the rendering is paused.  To continue
 *                      rendering call the function that is the first argument
 *                      to the callback.
 */
- 
+
 /**
 * PDF page operator list.
 *
@@ -2156,7 +2333,12 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
        intentState.renderTasks = [];
      }
      intentState.renderTasks.push(internalRenderTask);
-      var renderTask = new RenderTask(internalRenderTask);
+      var renderTask = internalRenderTask.task;
+
+      // Obsolete parameter support
+      if (params.continueCallback) {
+        renderTask.onContinue = params.continueCallback;
+      }

      var self = this;
      intentState.displayReadyCapability.promise.then(
@@ -2321,19 +2503,16 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
 * @ignore
 */
 var WorkerTransport = (function WorkerTransportClosure() {
-  function WorkerTransport(workerInitializedCapability, workerReadyCapability,
-                           pdfDataRangeTransport, progressCallback) {
+  function WorkerTransport(workerInitializedCapability, pdfDataRangeTransport) {
    this.pdfDataRangeTransport = pdfDataRangeTransport;
-
    this.workerInitializedCapability = workerInitializedCapability;
-    this.workerReadyCapability = workerReadyCapability;
-    this.progressCallback = progressCallback;
    this.commonObjs = new PDFObjects();

+    this.loadingTask = null;
+
    this.pageCache = [];
    this.pagePromises = [];
    this.downloadInfoCapability = createPromiseCapability();
-    this.passwordCallback = null;

    // 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
@@ -2482,48 +2661,50 @@ var WorkerTransport = (function WorkerTransportClosure() {
        this.numPages = data.pdfInfo.numPages;
        var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
        this.pdfDocument = pdfDocument;
-        this.workerReadyCapability.resolve(pdfDocument);
+        this.loadingTask._capability.resolve(pdfDocument);
      }, this);

      messageHandler.on('NeedPassword',
                        function transportNeedPassword(exception) {
-        if (this.passwordCallback) {
-          return this.passwordCallback(updatePassword,
-                                       PasswordResponses.NEED_PASSWORD);
+        var loadingTask = this.loadingTask;
+        if (loadingTask.onPassword) {
+          return loadingTask.onPassword(updatePassword,
+                                        PasswordResponses.NEED_PASSWORD);
        }
-        this.workerReadyCapability.reject(
+        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

      messageHandler.on('IncorrectPassword',
                        function transportIncorrectPassword(exception) {
-        if (this.passwordCallback) {
-          return this.passwordCallback(updatePassword,
-                                       PasswordResponses.INCORRECT_PASSWORD);
+        var loadingTask = this.loadingTask;
+        if (loadingTask.onPassword) {
+          return loadingTask.onPassword(updatePassword,
+                                        PasswordResponses.INCORRECT_PASSWORD);
        }
-        this.workerReadyCapability.reject(
+        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

      messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
-        this.workerReadyCapability.reject(
+        this.loadingTask._capability.reject(
          new InvalidPDFException(exception.message));
      }, this);

      messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
-        this.workerReadyCapability.reject(
+        this.loadingTask._capability.reject(
          new MissingPDFException(exception.message));
      }, this);

      messageHandler.on('UnexpectedResponse',
                        function transportUnexpectedResponse(exception) {
-        this.workerReadyCapability.reject(
+        this.loadingTask._capability.reject(
          new UnexpectedResponseException(exception.message, exception.status));
      }, this);

      messageHandler.on('UnknownError',
                        function transportUnknownError(exception) {
-        this.workerReadyCapability.reject(
+        this.loadingTask._capability.reject(
          new UnknownErrorException(exception.message, exception.details));
      }, this);

@@ -2618,8 +2799,9 @@ var WorkerTransport = (function WorkerTransportClosure() {
      }, this);

      messageHandler.on('DocProgress', function transportDocProgress(data) {
-        if (this.progressCallback) {
-          this.progressCallback({
+        var loadingTask = this.loadingTask;
+        if (loadingTask.onProgress) {
+          loadingTask.onProgress({
            loaded: data.loaded,
            total: data.total
          });
@@ -2679,10 +2861,16 @@ var WorkerTransport = (function WorkerTransportClosure() {
      });
    },

-    fetchDocument: function WorkerTransport_fetchDocument(source) {
+    fetchDocument: function WorkerTransport_fetchDocument(loadingTask, source) {
+      this.loadingTask = loadingTask;
+
      source.disableAutoFetch = PDFJS.disableAutoFetch;
      source.disableStream = PDFJS.disableStream;
      source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
+      if (this.pdfDataRangeTransport) {
+        source.length = this.pdfDataRangeTransport.length;
+        source.initialData = this.pdfDataRangeTransport.initialData;
+      }
      this.messageHandler.send('GetDocRequest', {
        source: source,
        disableRange: PDFJS.disableRange,
@@ -2893,26 +3081,37 @@ var PDFObjects = (function PDFObjectsClosure() {
 */
 var RenderTask = (function RenderTaskClosure() {
  function RenderTask(internalRenderTask) {
-    this.internalRenderTask = internalRenderTask;
+    this._internalRenderTask = internalRenderTask;
+
    /**
-     * Promise for rendering task completion.
-     * @type {Promise}
+     * Callback for incremental rendering -- a function that will be called
+     * each time the rendering is paused.  To continue rendering call the
+     * function that is the first argument to the callback.
+     * @type {function}
     */
-    this.promise = this.internalRenderTask.capability.promise;
+    this.onContinue = null;
  }

  RenderTask.prototype = /** @lends RenderTask.prototype */ {
+    /**
+     * Promise for rendering task completion.
+     * @return {Promise}
+     */
+    get promise() {
+      return this._internalRenderTask.capability.promise;
+    },
+
    /**
     * Cancels the rendering task. If the task is currently rendering it will
     * not be cancelled until graphics pauses with a timeout. The promise that
     * this object extends will resolved when cancelled.
     */
    cancel: function RenderTask_cancel() {
-      this.internalRenderTask.cancel();
+      this._internalRenderTask.cancel();
    },

    /**
-     * Registers callback to indicate the rendering task completion.
+     * Registers callbacks to indicate the rendering task completion.
     *
     * @param {function} onFulfilled The callback for the rendering completion.
     * @param {function} onRejected The callback for the rendering failure.
@@ -2920,7 +3119,7 @@ var RenderTask = (function RenderTaskClosure() {
     *                   onRejected callback.
     */
    then: function RenderTask_then(onFulfilled, onRejected) {
-      return this.promise.then(onFulfilled, onRejected);
+      return this.promise.then.apply(this.promise, arguments);
    }
  };

@@ -2947,6 +3146,7 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
    this.graphicsReady = false;
    this.cancelled = false;
    this.capability = createPromiseCapability();
+    this.task = new RenderTask(this);
    // caching this-bound methods
    this._continueBound = this._continue.bind(this);
    this._scheduleNextBound = this._scheduleNext.bind(this);
@@ -3009,8 +3209,8 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
      if (this.cancelled) {
        return;
      }
-      if (this.params.continueCallback) {
-        this.params.continueCallback(this._scheduleNextBound);
+      if (this.task.onContinue) {
+        this.task.onContinue.call(this.task, this._scheduleNextBound);
      } else {
        this._scheduleNext();
      }
@@ -3149,11 +3349,8 @@ function createScratchCanvas(width, height) {
 }

 function addContextCurrentTransform(ctx) {
-  // If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
+  // If the context doesn't expose a `mozCurrentTransform`, add a JS based one.
  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;
@@ -3162,7 +3359,7 @@ function addContextCurrentTransform(ctx) {
    ctx._originalTransform = ctx.transform;
    ctx._originalSetTransform = ctx.setTransform;

-    ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0];
+    ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];
    ctx._transformStack = [];

    Object.defineProperty(ctx, 'mozCurrentTransform', {
@@ -3538,6 +3735,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
    this.smaskCounter = 0;
    this.tempSMask = null;
    if (canvasCtx) {
+      // NOTE: if mozCurrentTransform is polyfilled, then the current state of
+      // the transformation must already be set in canvasCtx._transformMatrix.
      addContextCurrentTransform(canvasCtx);
    }
    this.cachedGetSinglePixelWidth = null;
@@ -5254,7 +5453,6 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
 })();


-
 var WebGLUtils = (function WebGLUtilsClosure() {
  function loadShader(gl, code, shaderType) {
    var shader = gl.createShader(shaderType);
@@ -6165,7 +6363,8 @@ var FontLoader = {

  nativeFontFaces: [],

-  isFontLoadingAPISupported: !isWorker && !!document.fonts,
+  isFontLoadingAPISupported: (!isWorker && typeof document !== 'undefined' &&
+                              !!document.fonts),

  addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) {
    this.nativeFontFaces.push(nativeFontFace);
@@ -6634,6 +6833,9 @@ var AnnotationUtils = (function AnnotationUtilsClosure() {

    var link = document.createElement('a');
    link.href = link.title = item.url || '';
+    if (item.url && PDFJS.openExternalLinksInNewWindow) {
+      link.target = '_blank';
+    }

    container.appendChild(link);

@@ -6893,7 +7095,7 @@ var SVGExtraState = (function SVGExtraStateClosure() {
    this.lineJoin = '';
    this.lineCap = '';
    this.miterLimit = 0;
-    
+
    this.dashArray = [];
    this.dashPhase = 0;

@@ -7120,7 +7322,7 @@ var SVGGraphics = (function SVGGraphicsClosure() {
      }
      return opListToTree(opList);
    },
-    
+
    executeOpTree: function SVGGraphics_executeOpTree(opTree) {
      var opTreeLen = opTree.length;
      for(var x = 0; x < opTreeLen; x++) {
@@ -7159,6 +7361,9 @@ var SVGGraphics = (function SVGGraphicsClosure() {
          case OPS.setWordSpacing:
            this.setWordSpacing(args[0]);
            break;
+          case OPS.setHScale:
+            this.setHScale(args[0]);
+            break;
          case OPS.setTextMatrix:
            this.setTextMatrix(args[0], args[1], args[2],
                               args[3], args[4], args[5]);