959 lines
32 KiB
JavaScript
959 lines
32 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* jshint esnext:true */
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/* globals Components, Services, XPCOMUtils, NetUtil, PrivateBrowsingUtils,
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dump, NetworkManager, PdfJsTelemetry */
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'use strict';
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var EXPORTED_SYMBOLS = ['PdfStreamConverter'];
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cr = Components.results;
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const Cu = Components.utils;
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// True only if this is the version of pdf.js that is included with firefox.
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const MOZ_CENTRAL = JSON.parse('PDFJSSCRIPT_MOZ_CENTRAL');
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const PDFJS_EVENT_ID = 'pdf.js.message';
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const PDF_CONTENT_TYPE = 'application/pdf';
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const PREF_PREFIX = 'PDFJSSCRIPT_PREF_PREFIX';
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const PDF_VIEWER_WEB_PAGE = 'resource://pdf.js/web/viewer.html';
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const MAX_NUMBER_OF_PREFS = 50;
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const MAX_STRING_PREF_LENGTH = 128;
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Cu.import('resource://gre/modules/XPCOMUtils.jsm');
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Cu.import('resource://gre/modules/Services.jsm');
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Cu.import('resource://gre/modules/NetUtil.jsm');
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XPCOMUtils.defineLazyModuleGetter(this, 'NetworkManager',
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'resource://pdf.js/network.js');
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XPCOMUtils.defineLazyModuleGetter(this, 'PrivateBrowsingUtils',
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'resource://gre/modules/PrivateBrowsingUtils.jsm');
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XPCOMUtils.defineLazyModuleGetter(this, 'PdfJsTelemetry',
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'resource://pdf.js/PdfJsTelemetry.jsm');
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var Svc = {};
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XPCOMUtils.defineLazyServiceGetter(Svc, 'mime',
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'@mozilla.org/mime;1',
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'nsIMIMEService');
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function getChromeWindow(domWindow) {
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var containingBrowser = domWindow.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation)
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.QueryInterface(Ci.nsIDocShell)
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.chromeEventHandler;
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return containingBrowser.ownerDocument.defaultView;
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}
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function setBoolPref(pref, value) {
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Services.prefs.setBoolPref(pref, value);
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}
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function getBoolPref(pref, def) {
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try {
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return Services.prefs.getBoolPref(pref);
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} catch (ex) {
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return def;
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}
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}
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function setIntPref(pref, value) {
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Services.prefs.setIntPref(pref, value);
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}
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function getIntPref(pref, def) {
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try {
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return Services.prefs.getIntPref(pref);
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} catch (ex) {
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return def;
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}
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}
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function setStringPref(pref, value) {
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var str = Cc['@mozilla.org/supports-string;1']
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.createInstance(Ci.nsISupportsString);
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str.data = value;
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Services.prefs.setComplexValue(pref, Ci.nsISupportsString, str);
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}
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function getStringPref(pref, def) {
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try {
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return Services.prefs.getComplexValue(pref, Ci.nsISupportsString).data;
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} catch (ex) {
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return def;
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}
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}
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function log(aMsg) {
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if (!getBoolPref(PREF_PREFIX + '.pdfBugEnabled', false))
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return;
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var msg = 'PdfStreamConverter.js: ' + (aMsg.join ? aMsg.join('') : aMsg);
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Services.console.logStringMessage(msg);
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dump(msg + '\n');
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}
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function getDOMWindow(aChannel) {
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var requestor = aChannel.notificationCallbacks ?
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aChannel.notificationCallbacks :
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aChannel.loadGroup.notificationCallbacks;
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var win = requestor.getInterface(Components.interfaces.nsIDOMWindow);
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return win;
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}
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function getLocalizedStrings(path) {
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var stringBundle = Cc['@mozilla.org/intl/stringbundle;1'].
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getService(Ci.nsIStringBundleService).
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createBundle('chrome://pdf.js/locale/' + path);
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var map = {};
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var enumerator = stringBundle.getSimpleEnumeration();
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while (enumerator.hasMoreElements()) {
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var string = enumerator.getNext().QueryInterface(Ci.nsIPropertyElement);
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var key = string.key, property = 'textContent';
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var i = key.lastIndexOf('.');
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if (i >= 0) {
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property = key.substring(i + 1);
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key = key.substring(0, i);
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}
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if (!(key in map))
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map[key] = {};
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map[key][property] = string.value;
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}
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return map;
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}
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function getLocalizedString(strings, id, property) {
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property = property || 'textContent';
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if (id in strings)
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return strings[id][property];
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return id;
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}
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// PDF data storage
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function PdfDataListener(length) {
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this.length = length; // less than 0, if length is unknown
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this.data = new Uint8Array(length >= 0 ? length : 0x10000);
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this.loaded = 0;
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}
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PdfDataListener.prototype = {
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append: function PdfDataListener_append(chunk) {
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var willBeLoaded = this.loaded + chunk.length;
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if (this.length >= 0 && this.length < willBeLoaded) {
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this.length = -1; // reset the length, server is giving incorrect one
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}
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if (this.length < 0 && this.data.length < willBeLoaded) {
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// data length is unknown and new chunk will not fit in the existing
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// buffer, resizing the buffer by doubling the its last length
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var newLength = this.data.length;
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for (; newLength < willBeLoaded; newLength *= 2) {}
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var newData = new Uint8Array(newLength);
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newData.set(this.data);
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this.data = newData;
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}
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this.data.set(chunk, this.loaded);
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this.loaded = willBeLoaded;
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this.onprogress(this.loaded, this.length >= 0 ? this.length : void(0));
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},
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getData: function PdfDataListener_getData() {
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var data = this.data;
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if (this.loaded != data.length)
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data = data.subarray(0, this.loaded);
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delete this.data; // releasing temporary storage
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return data;
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},
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finish: function PdfDataListener_finish() {
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this.isDataReady = true;
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if (this.oncompleteCallback) {
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this.oncompleteCallback(this.getData());
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}
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},
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error: function PdfDataListener_error(errorCode) {
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this.errorCode = errorCode;
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if (this.oncompleteCallback) {
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this.oncompleteCallback(null, errorCode);
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}
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},
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onprogress: function() {},
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get oncomplete() {
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return this.oncompleteCallback;
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},
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set oncomplete(value) {
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this.oncompleteCallback = value;
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if (this.isDataReady) {
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value(this.getData());
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}
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if (this.errorCode) {
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value(null, this.errorCode);
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}
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}
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};
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// All the priviledged actions.
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function ChromeActions(domWindow, contentDispositionFilename) {
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this.domWindow = domWindow;
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this.contentDispositionFilename = contentDispositionFilename;
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this.telemetryState = {
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documentInfo: false,
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firstPageInfo: false,
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streamTypesUsed: [],
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startAt: Date.now()
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};
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}
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ChromeActions.prototype = {
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isInPrivateBrowsing: function() {
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return PrivateBrowsingUtils.isWindowPrivate(this.domWindow);
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},
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download: function(data, sendResponse) {
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var self = this;
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var originalUrl = data.originalUrl;
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// The data may not be downloaded so we need just retry getting the pdf with
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// the original url.
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var originalUri = NetUtil.newURI(data.originalUrl);
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var filename = data.filename;
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if (typeof filename !== 'string' || !/\.pdf$/i.test(filename)) {
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filename = 'document.pdf';
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}
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var blobUri = data.blobUrl ? NetUtil.newURI(data.blobUrl) : originalUri;
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var extHelperAppSvc =
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Cc['@mozilla.org/uriloader/external-helper-app-service;1'].
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getService(Ci.nsIExternalHelperAppService);
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var frontWindow = Cc['@mozilla.org/embedcomp/window-watcher;1'].
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getService(Ci.nsIWindowWatcher).activeWindow;
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var docIsPrivate = this.isInPrivateBrowsing();
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var netChannel = NetUtil.newChannel(blobUri);
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if ('nsIPrivateBrowsingChannel' in Ci &&
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netChannel instanceof Ci.nsIPrivateBrowsingChannel) {
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netChannel.setPrivate(docIsPrivate);
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}
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NetUtil.asyncFetch(netChannel, function(aInputStream, aResult) {
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if (!Components.isSuccessCode(aResult)) {
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if (sendResponse)
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sendResponse(true);
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return;
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}
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// Create a nsIInputStreamChannel so we can set the url on the channel
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// so the filename will be correct.
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var channel = Cc['@mozilla.org/network/input-stream-channel;1'].
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createInstance(Ci.nsIInputStreamChannel);
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channel.QueryInterface(Ci.nsIChannel);
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try {
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// contentDisposition/contentDispositionFilename is readonly before FF18
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channel.contentDisposition = Ci.nsIChannel.DISPOSITION_ATTACHMENT;
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if (self.contentDispositionFilename) {
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channel.contentDispositionFilename = self.contentDispositionFilename;
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} else {
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channel.contentDispositionFilename = filename;
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}
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} catch (e) {}
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channel.setURI(originalUri);
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channel.contentStream = aInputStream;
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if ('nsIPrivateBrowsingChannel' in Ci &&
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channel instanceof Ci.nsIPrivateBrowsingChannel) {
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channel.setPrivate(docIsPrivate);
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}
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var listener = {
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extListener: null,
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onStartRequest: function(aRequest, aContext) {
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this.extListener = extHelperAppSvc.doContent('application/pdf',
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aRequest, frontWindow, false);
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this.extListener.onStartRequest(aRequest, aContext);
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},
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onStopRequest: function(aRequest, aContext, aStatusCode) {
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if (this.extListener)
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this.extListener.onStopRequest(aRequest, aContext, aStatusCode);
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// Notify the content code we're done downloading.
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if (sendResponse)
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sendResponse(false);
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},
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onDataAvailable: function(aRequest, aContext, aInputStream, aOffset,
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aCount) {
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this.extListener.onDataAvailable(aRequest, aContext, aInputStream,
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aOffset, aCount);
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}
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};
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channel.asyncOpen(listener, null);
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});
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},
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getLocale: function() {
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return getStringPref('general.useragent.locale', 'en-US');
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},
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getStrings: function(data) {
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try {
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// Lazy initialization of localizedStrings
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if (!('localizedStrings' in this))
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this.localizedStrings = getLocalizedStrings('viewer.properties');
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var result = this.localizedStrings[data];
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return JSON.stringify(result || null);
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} catch (e) {
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log('Unable to retrive localized strings: ' + e);
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return 'null';
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}
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},
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pdfBugEnabled: function() {
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return getBoolPref(PREF_PREFIX + '.pdfBugEnabled', false);
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},
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supportsIntegratedFind: function() {
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// Integrated find is only supported when we're not in a frame and when the
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// new find events code exists.
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return this.domWindow.frameElement === null &&
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getChromeWindow(this.domWindow).gFindBar &&
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'updateControlState' in getChromeWindow(this.domWindow).gFindBar;
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},
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supportsDocumentFonts: function() {
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var prefBrowser = getIntPref('browser.display.use_document_fonts', 1);
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var prefGfx = getBoolPref('gfx.downloadable_fonts.enabled', true);
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return (!!prefBrowser && prefGfx);
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},
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supportsDocumentColors: function() {
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return getBoolPref('browser.display.use_document_colors', true);
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},
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reportTelemetry: function (data) {
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var probeInfo = JSON.parse(data);
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switch (probeInfo.type) {
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case 'documentInfo':
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if (!this.telemetryState.documentInfo) {
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PdfJsTelemetry.onDocumentVersion(probeInfo.version | 0);
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PdfJsTelemetry.onDocumentGenerator(probeInfo.generator | 0);
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if (probeInfo.formType) {
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PdfJsTelemetry.onForm(probeInfo.formType === 'acroform');
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}
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this.telemetryState.documentInfo = true;
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}
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break;
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case 'pageInfo':
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if (!this.telemetryState.firstPageInfo) {
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var duration = Date.now() - this.telemetryState.startAt;
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PdfJsTelemetry.onTimeToView(duration);
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this.telemetryState.firstPageInfo = true;
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}
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break;
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case 'streamInfo':
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if (!Array.isArray(probeInfo.streamTypes)) {
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break;
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}
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for (var i = 0; i < probeInfo.streamTypes.length; i++) {
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var streamTypeId = probeInfo.streamTypes[i] | 0;
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if (streamTypeId >= 0 && streamTypeId < 10 &&
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!this.telemetryState.streamTypesUsed[streamTypeId]) {
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PdfJsTelemetry.onStreamType(streamTypeId);
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this.telemetryState.streamTypesUsed[streamTypeId] = true;
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}
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}
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break;
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}
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},
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fallback: function(args, sendResponse) {
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var featureId = args.featureId;
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var url = args.url;
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var self = this;
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var domWindow = this.domWindow;
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var strings = getLocalizedStrings('chrome.properties');
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var message;
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if (featureId === 'forms') {
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message = getLocalizedString(strings, 'unsupported_feature_forms');
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} else {
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message = getLocalizedString(strings, 'unsupported_feature');
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}
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PdfJsTelemetry.onFallback();
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var notificationBox = null;
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try {
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// Based on MDN's "Working with windows in chrome code"
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var mainWindow = domWindow
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.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsIDocShellTreeItem)
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.rootTreeItem
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.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIDOMWindow);
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var browser = mainWindow.gBrowser
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.getBrowserForDocument(domWindow.top.document);
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notificationBox = mainWindow.gBrowser.getNotificationBox(browser);
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} catch (e) {
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log('Unable to get a notification box for the fallback message');
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return;
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}
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// Flag so we don't call the response callback twice, since if the user
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// clicks open with different viewer both the button callback and
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// eventCallback will be called.
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var sentResponse = false;
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var buttons = [{
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label: getLocalizedString(strings, 'open_with_different_viewer'),
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accessKey: getLocalizedString(strings, 'open_with_different_viewer',
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'accessKey'),
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callback: function() {
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sentResponse = true;
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sendResponse(true);
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}
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}];
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notificationBox.appendNotification(message, 'pdfjs-fallback', null,
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notificationBox.PRIORITY_INFO_LOW,
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buttons,
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function eventsCallback(eventType) {
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// Currently there is only one event "removed" but if there are any other
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// added in the future we still only care about removed at the moment.
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if (eventType !== 'removed')
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return;
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// Don't send a response again if we already responded when the button was
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// clicked.
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if (!sentResponse)
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sendResponse(false);
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});
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},
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updateFindControlState: function(data) {
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if (!this.supportsIntegratedFind())
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return;
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// Verify what we're sending to the findbar.
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var result = data.result;
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var findPrevious = data.findPrevious;
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var findPreviousType = typeof findPrevious;
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if ((typeof result !== 'number' || result < 0 || result > 3) ||
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(findPreviousType !== 'undefined' && findPreviousType !== 'boolean')) {
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return;
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}
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getChromeWindow(this.domWindow).gFindBar
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.updateControlState(result, findPrevious);
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},
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setPreferences: function(prefs, sendResponse) {
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var defaultBranch = Services.prefs.getDefaultBranch(PREF_PREFIX + '.');
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var numberOfPrefs = 0;
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var prefValue, prefName;
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for (var key in prefs) {
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if (++numberOfPrefs > MAX_NUMBER_OF_PREFS) {
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log('setPreferences - Exceeded the maximum number of preferences ' +
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'that is allowed to be set at once.');
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break;
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} else if (!defaultBranch.getPrefType(key)) {
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continue;
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}
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prefValue = prefs[key];
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prefName = (PREF_PREFIX + '.' + key);
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switch (typeof prefValue) {
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case 'boolean':
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setBoolPref(prefName, prefValue);
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break;
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case 'number':
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setIntPref(prefName, prefValue);
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break;
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case 'string':
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if (prefValue.length > MAX_STRING_PREF_LENGTH) {
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log('setPreferences - Exceeded the maximum allowed length ' +
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'for a string preference.');
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} else {
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setStringPref(prefName, prefValue);
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}
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break;
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}
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}
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if (sendResponse) {
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sendResponse(true);
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}
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},
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getPreferences: function(prefs, sendResponse) {
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var defaultBranch = Services.prefs.getDefaultBranch(PREF_PREFIX + '.');
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var currentPrefs = {}, numberOfPrefs = 0;
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var prefValue, prefName;
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for (var key in prefs) {
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if (++numberOfPrefs > MAX_NUMBER_OF_PREFS) {
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log('getPreferences - Exceeded the maximum number of preferences ' +
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'that is allowed to be fetched at once.');
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break;
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} else if (!defaultBranch.getPrefType(key)) {
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continue;
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}
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prefValue = prefs[key];
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prefName = (PREF_PREFIX + '.' + key);
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switch (typeof prefValue) {
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case 'boolean':
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currentPrefs[key] = getBoolPref(prefName, prefValue);
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break;
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case 'number':
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currentPrefs[key] = getIntPref(prefName, prefValue);
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break;
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case 'string':
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currentPrefs[key] = getStringPref(prefName, prefValue);
|
|
break;
|
|
}
|
|
}
|
|
if (sendResponse) {
|
|
sendResponse(JSON.stringify(currentPrefs));
|
|
} else {
|
|
return JSON.stringify(currentPrefs);
|
|
}
|
|
}
|
|
};
|
|
|
|
var RangedChromeActions = (function RangedChromeActionsClosure() {
|
|
/**
|
|
* This is for range requests
|
|
*/
|
|
function RangedChromeActions(
|
|
domWindow, contentDispositionFilename, originalRequest,
|
|
dataListener) {
|
|
|
|
ChromeActions.call(this, domWindow, contentDispositionFilename);
|
|
this.dataListener = dataListener;
|
|
this.originalRequest = originalRequest;
|
|
|
|
this.pdfUrl = originalRequest.URI.spec;
|
|
this.contentLength = originalRequest.contentLength;
|
|
|
|
// Pass all the headers from the original request through
|
|
var httpHeaderVisitor = {
|
|
headers: {},
|
|
visitHeader: function(aHeader, aValue) {
|
|
if (aHeader === 'Range') {
|
|
// When loading the PDF from cache, firefox seems to set the Range
|
|
// request header to fetch only the unfetched portions of the file
|
|
// (e.g. 'Range: bytes=1024-'). However, we want to set this header
|
|
// manually to fetch the PDF in chunks.
|
|
return;
|
|
}
|
|
this.headers[aHeader] = aValue;
|
|
}
|
|
};
|
|
originalRequest.visitRequestHeaders(httpHeaderVisitor);
|
|
|
|
var self = this;
|
|
var xhr_onreadystatechange = function xhr_onreadystatechange() {
|
|
if (this.readyState === 1) { // LOADING
|
|
var netChannel = this.channel;
|
|
if ('nsIPrivateBrowsingChannel' in Ci &&
|
|
netChannel instanceof Ci.nsIPrivateBrowsingChannel) {
|
|
var docIsPrivate = self.isInPrivateBrowsing();
|
|
netChannel.setPrivate(docIsPrivate);
|
|
}
|
|
}
|
|
};
|
|
var getXhr = function getXhr() {
|
|
const XMLHttpRequest = Components.Constructor(
|
|
'@mozilla.org/xmlextras/xmlhttprequest;1');
|
|
var xhr = new XMLHttpRequest();
|
|
xhr.addEventListener('readystatechange', xhr_onreadystatechange);
|
|
return xhr;
|
|
};
|
|
|
|
this.networkManager = new NetworkManager(this.pdfUrl, {
|
|
httpHeaders: httpHeaderVisitor.headers,
|
|
getXhr: getXhr
|
|
});
|
|
|
|
// If we are in range request mode, this means we manually issued xhr
|
|
// requests, which we need to abort when we leave the page
|
|
domWindow.addEventListener('unload', function unload(e) {
|
|
self.networkManager.abortAllRequests();
|
|
domWindow.removeEventListener(e.type, unload);
|
|
});
|
|
}
|
|
|
|
RangedChromeActions.prototype = Object.create(ChromeActions.prototype);
|
|
var proto = RangedChromeActions.prototype;
|
|
proto.constructor = RangedChromeActions;
|
|
|
|
proto.initPassiveLoading = function RangedChromeActions_initPassiveLoading() {
|
|
this.originalRequest.cancel(Cr.NS_BINDING_ABORTED);
|
|
this.originalRequest = null;
|
|
this.domWindow.postMessage({
|
|
pdfjsLoadAction: 'supportsRangedLoading',
|
|
pdfUrl: this.pdfUrl,
|
|
length: this.contentLength,
|
|
data: this.dataListener.getData()
|
|
}, '*');
|
|
this.dataListener = null;
|
|
|
|
return true;
|
|
};
|
|
|
|
proto.requestDataRange = function RangedChromeActions_requestDataRange(args) {
|
|
var begin = args.begin;
|
|
var end = args.end;
|
|
var domWindow = this.domWindow;
|
|
// TODO(mack): Support error handler. We're not currently not handling
|
|
// errors from chrome code for non-range requests, so this doesn't
|
|
// seem high-pri
|
|
this.networkManager.requestRange(begin, end, {
|
|
onDone: function RangedChromeActions_onDone(args) {
|
|
domWindow.postMessage({
|
|
pdfjsLoadAction: 'range',
|
|
begin: args.begin,
|
|
chunk: args.chunk
|
|
}, '*');
|
|
},
|
|
onProgress: function RangedChromeActions_onProgress(evt) {
|
|
domWindow.postMessage({
|
|
pdfjsLoadAction: 'rangeProgress',
|
|
loaded: evt.loaded,
|
|
}, '*');
|
|
}
|
|
});
|
|
};
|
|
|
|
return RangedChromeActions;
|
|
})();
|
|
|
|
var StandardChromeActions = (function StandardChromeActionsClosure() {
|
|
|
|
/**
|
|
* This is for a single network stream
|
|
*/
|
|
function StandardChromeActions(domWindow, contentDispositionFilename,
|
|
dataListener) {
|
|
|
|
ChromeActions.call(this, domWindow, contentDispositionFilename);
|
|
this.dataListener = dataListener;
|
|
}
|
|
|
|
StandardChromeActions.prototype = Object.create(ChromeActions.prototype);
|
|
var proto = StandardChromeActions.prototype;
|
|
proto.constructor = StandardChromeActions;
|
|
|
|
proto.initPassiveLoading =
|
|
function StandardChromeActions_initPassiveLoading() {
|
|
|
|
if (!this.dataListener) {
|
|
return false;
|
|
}
|
|
|
|
var self = this;
|
|
|
|
this.dataListener.onprogress = function ChromeActions_dataListenerProgress(
|
|
loaded, total) {
|
|
self.domWindow.postMessage({
|
|
pdfjsLoadAction: 'progress',
|
|
loaded: loaded,
|
|
total: total
|
|
}, '*');
|
|
};
|
|
|
|
this.dataListener.oncomplete = function ChromeActions_dataListenerComplete(
|
|
data, errorCode) {
|
|
self.domWindow.postMessage({
|
|
pdfjsLoadAction: 'complete',
|
|
data: data,
|
|
errorCode: errorCode
|
|
}, '*');
|
|
|
|
delete self.dataListener;
|
|
};
|
|
|
|
return true;
|
|
};
|
|
|
|
return StandardChromeActions;
|
|
})();
|
|
|
|
// Event listener to trigger chrome privedged code.
|
|
function RequestListener(actions) {
|
|
this.actions = actions;
|
|
}
|
|
// Receive an event and synchronously or asynchronously responds.
|
|
RequestListener.prototype.receive = function(event) {
|
|
var message = event.target;
|
|
var doc = message.ownerDocument;
|
|
var action = event.detail.action;
|
|
var data = event.detail.data;
|
|
var sync = event.detail.sync;
|
|
var actions = this.actions;
|
|
if (!(action in actions)) {
|
|
log('Unknown action: ' + action);
|
|
return;
|
|
}
|
|
if (sync) {
|
|
var response = actions[action].call(this.actions, data);
|
|
var detail = event.detail;
|
|
detail.__exposedProps__ = {response: 'r'};
|
|
detail.response = response;
|
|
} else {
|
|
var response;
|
|
if (!event.detail.callback) {
|
|
doc.documentElement.removeChild(message);
|
|
response = null;
|
|
} else {
|
|
response = function sendResponse(response) {
|
|
try {
|
|
var listener = doc.createEvent('CustomEvent');
|
|
listener.initCustomEvent('pdf.js.response', true, false,
|
|
{response: response,
|
|
__exposedProps__: {response: 'r'}});
|
|
return message.dispatchEvent(listener);
|
|
} catch (e) {
|
|
// doc is no longer accessible because the requestor is already
|
|
// gone. unloaded content cannot receive the response anyway.
|
|
return false;
|
|
}
|
|
};
|
|
}
|
|
actions[action].call(this.actions, data, response);
|
|
}
|
|
};
|
|
|
|
// Forwards events from the eventElement to the contentWindow only if the
|
|
// content window matches the currently selected browser window.
|
|
function FindEventManager(eventElement, contentWindow, chromeWindow) {
|
|
this.types = ['find',
|
|
'findagain',
|
|
'findhighlightallchange',
|
|
'findcasesensitivitychange'];
|
|
this.chromeWindow = chromeWindow;
|
|
this.contentWindow = contentWindow;
|
|
this.eventElement = eventElement;
|
|
}
|
|
|
|
FindEventManager.prototype.bind = function() {
|
|
var unload = function(e) {
|
|
this.unbind();
|
|
this.contentWindow.removeEventListener(e.type, unload);
|
|
}.bind(this);
|
|
this.contentWindow.addEventListener('unload', unload);
|
|
|
|
for (var i = 0; i < this.types.length; i++) {
|
|
var type = this.types[i];
|
|
this.eventElement.addEventListener(type, this, true);
|
|
}
|
|
};
|
|
|
|
FindEventManager.prototype.handleEvent = function(e) {
|
|
var chromeWindow = this.chromeWindow;
|
|
var contentWindow = this.contentWindow;
|
|
// Only forward the events if they are for our dom window.
|
|
if (chromeWindow.gBrowser.selectedBrowser.contentWindow === contentWindow) {
|
|
var detail = e.detail;
|
|
detail.__exposedProps__ = {
|
|
query: 'r',
|
|
caseSensitive: 'r',
|
|
highlightAll: 'r',
|
|
findPrevious: 'r'
|
|
};
|
|
var forward = contentWindow.document.createEvent('CustomEvent');
|
|
forward.initCustomEvent(e.type, true, true, detail);
|
|
contentWindow.dispatchEvent(forward);
|
|
e.preventDefault();
|
|
}
|
|
};
|
|
|
|
FindEventManager.prototype.unbind = function() {
|
|
for (var i = 0; i < this.types.length; i++) {
|
|
var type = this.types[i];
|
|
this.eventElement.removeEventListener(type, this, true);
|
|
}
|
|
};
|
|
|
|
function PdfStreamConverter() {
|
|
}
|
|
|
|
PdfStreamConverter.prototype = {
|
|
|
|
// properties required for XPCOM registration:
|
|
classID: Components.ID('{PDFJSSCRIPT_STREAM_CONVERTER_ID}'),
|
|
classDescription: 'pdf.js Component',
|
|
contractID: '@mozilla.org/streamconv;1?from=application/pdf&to=*/*',
|
|
|
|
QueryInterface: XPCOMUtils.generateQI([
|
|
Ci.nsISupports,
|
|
Ci.nsIStreamConverter,
|
|
Ci.nsIStreamListener,
|
|
Ci.nsIRequestObserver
|
|
]),
|
|
|
|
/*
|
|
* This component works as such:
|
|
* 1. asyncConvertData stores the listener
|
|
* 2. onStartRequest creates a new channel, streams the viewer
|
|
* 3. If range requests are supported:
|
|
* 3.1. Leave the request open until the viewer is ready to switch to
|
|
* range requests.
|
|
*
|
|
* If range rquests are not supported:
|
|
* 3.1. Read the stream as it's loaded in onDataAvailable to send
|
|
* to the viewer
|
|
*
|
|
* The convert function just returns the stream, it's just the synchronous
|
|
* version of asyncConvertData.
|
|
*/
|
|
|
|
// nsIStreamConverter::convert
|
|
convert: function(aFromStream, aFromType, aToType, aCtxt) {
|
|
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
|
|
},
|
|
|
|
// nsIStreamConverter::asyncConvertData
|
|
asyncConvertData: function(aFromType, aToType, aListener, aCtxt) {
|
|
// Store the listener passed to us
|
|
this.listener = aListener;
|
|
},
|
|
|
|
// nsIStreamListener::onDataAvailable
|
|
onDataAvailable: function(aRequest, aContext, aInputStream, aOffset, aCount) {
|
|
if (!this.dataListener) {
|
|
return;
|
|
}
|
|
|
|
var binaryStream = this.binaryStream;
|
|
binaryStream.setInputStream(aInputStream);
|
|
var chunk = binaryStream.readByteArray(aCount);
|
|
this.dataListener.append(chunk);
|
|
},
|
|
|
|
// nsIRequestObserver::onStartRequest
|
|
onStartRequest: function(aRequest, aContext) {
|
|
// Setup the request so we can use it below.
|
|
var isHttpRequest = false;
|
|
try {
|
|
aRequest.QueryInterface(Ci.nsIHttpChannel);
|
|
isHttpRequest = true;
|
|
} catch (e) {}
|
|
|
|
var rangeRequest = false;
|
|
if (isHttpRequest) {
|
|
var contentEncoding = 'identity';
|
|
try {
|
|
contentEncoding = aRequest.getResponseHeader('Content-Encoding');
|
|
} catch (e) {}
|
|
|
|
var acceptRanges;
|
|
try {
|
|
acceptRanges = aRequest.getResponseHeader('Accept-Ranges');
|
|
} catch (e) {}
|
|
|
|
var hash = aRequest.URI.ref;
|
|
rangeRequest = contentEncoding === 'identity' &&
|
|
acceptRanges === 'bytes' &&
|
|
aRequest.contentLength >= 0 &&
|
|
hash.indexOf('disableRange=true') < 0;
|
|
}
|
|
|
|
aRequest.QueryInterface(Ci.nsIChannel);
|
|
|
|
aRequest.QueryInterface(Ci.nsIWritablePropertyBag);
|
|
|
|
var contentDispositionFilename;
|
|
try {
|
|
contentDispositionFilename = aRequest.contentDispositionFilename;
|
|
} catch (e) {}
|
|
|
|
// Change the content type so we don't get stuck in a loop.
|
|
aRequest.setProperty('contentType', aRequest.contentType);
|
|
aRequest.contentType = 'text/html';
|
|
if (isHttpRequest) {
|
|
// We trust PDF viewer, using no CSP
|
|
aRequest.setResponseHeader('Content-Security-Policy', '', false);
|
|
aRequest.setResponseHeader('Content-Security-Policy-Report-Only', '',
|
|
false);
|
|
aRequest.setResponseHeader('X-Content-Security-Policy', '', false);
|
|
aRequest.setResponseHeader('X-Content-Security-Policy-Report-Only', '',
|
|
false);
|
|
}
|
|
|
|
PdfJsTelemetry.onViewerIsUsed();
|
|
PdfJsTelemetry.onDocumentSize(aRequest.contentLength);
|
|
|
|
|
|
// Creating storage for PDF data
|
|
var contentLength = aRequest.contentLength;
|
|
this.dataListener = new PdfDataListener(contentLength);
|
|
this.binaryStream = Cc['@mozilla.org/binaryinputstream;1']
|
|
.createInstance(Ci.nsIBinaryInputStream);
|
|
|
|
// Create a new channel that is viewer loaded as a resource.
|
|
var ioService = Services.io;
|
|
var channel = ioService.newChannel(
|
|
PDF_VIEWER_WEB_PAGE, null, null);
|
|
|
|
var listener = this.listener;
|
|
var dataListener = this.dataListener;
|
|
// Proxy all the request observer calls, when it gets to onStopRequest
|
|
// we can get the dom window. We also intentionally pass on the original
|
|
// request(aRequest) below so we don't overwrite the original channel and
|
|
// trigger an assertion.
|
|
var proxy = {
|
|
onStartRequest: function(request, context) {
|
|
listener.onStartRequest(aRequest, context);
|
|
},
|
|
onDataAvailable: function(request, context, inputStream, offset, count) {
|
|
listener.onDataAvailable(aRequest, context, inputStream, offset, count);
|
|
},
|
|
onStopRequest: function(request, context, statusCode) {
|
|
// We get the DOM window here instead of before the request since it
|
|
// may have changed during a redirect.
|
|
var domWindow = getDOMWindow(channel);
|
|
var actions;
|
|
if (rangeRequest) {
|
|
actions = new RangedChromeActions(
|
|
domWindow, contentDispositionFilename, aRequest, dataListener);
|
|
} else {
|
|
actions = new StandardChromeActions(
|
|
domWindow, contentDispositionFilename, dataListener);
|
|
}
|
|
var requestListener = new RequestListener(actions);
|
|
domWindow.addEventListener(PDFJS_EVENT_ID, function(event) {
|
|
requestListener.receive(event);
|
|
}, false, true);
|
|
if (actions.supportsIntegratedFind()) {
|
|
var chromeWindow = getChromeWindow(domWindow);
|
|
var findEventManager = new FindEventManager(chromeWindow.gFindBar,
|
|
domWindow,
|
|
chromeWindow);
|
|
findEventManager.bind();
|
|
}
|
|
listener.onStopRequest(aRequest, context, statusCode);
|
|
}
|
|
};
|
|
|
|
// Keep the URL the same so the browser sees it as the same.
|
|
channel.originalURI = aRequest.URI;
|
|
channel.loadGroup = aRequest.loadGroup;
|
|
|
|
// We can use resource principal when data is fetched by the chrome
|
|
// e.g. useful for NoScript
|
|
var securityManager = Cc['@mozilla.org/scriptsecuritymanager;1']
|
|
.getService(Ci.nsIScriptSecurityManager);
|
|
var uri = ioService.newURI(PDF_VIEWER_WEB_PAGE, null, null);
|
|
// FF16 and below had getCodebasePrincipal, it was replaced by
|
|
// getNoAppCodebasePrincipal (bug 758258).
|
|
var resourcePrincipal = 'getNoAppCodebasePrincipal' in securityManager ?
|
|
securityManager.getNoAppCodebasePrincipal(uri) :
|
|
securityManager.getCodebasePrincipal(uri);
|
|
aRequest.owner = resourcePrincipal;
|
|
channel.asyncOpen(proxy, aContext);
|
|
},
|
|
|
|
// nsIRequestObserver::onStopRequest
|
|
onStopRequest: function(aRequest, aContext, aStatusCode) {
|
|
if (!this.dataListener) {
|
|
// Do nothing
|
|
return;
|
|
}
|
|
|
|
if (Components.isSuccessCode(aStatusCode))
|
|
this.dataListener.finish();
|
|
else
|
|
this.dataListener.error(aStatusCode);
|
|
delete this.dataListener;
|
|
delete this.binaryStream;
|
|
}
|
|
};
|