DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d8847129d134)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* jshint esnext:true */
/* globals Components, Services, XPCOMUtils */

'use strict';

var EXPORTED_SYMBOLS = ['PdfjsContentUtils'];

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const Cu = Components.utils;

Cu.import('resource://gre/modules/XPCOMUtils.jsm');
Cu.import('resource://gre/modules/Services.jsm');

let PdfjsContentUtils = {
  _mm: null,

  /*
   * Public API
   */

  get isRemote() {
    return (Services.appinfo.processType ===
            Services.appinfo.PROCESS_TYPE_CONTENT);
  },

  init: function () {
    // child *process* mm, or when loaded into the parent for in-content
    // support the psuedo child process mm 'child PPMM'.
    if (!this._mm) {
      this._mm = Cc['@mozilla.org/childprocessmessagemanager;1'].
        getService(Ci.nsISyncMessageSender);
      this._mm.addMessageListener('PDFJS:Child:refreshSettings', this);
      Services.obs.addObserver(this, 'quit-application', false);
    }
  },

  uninit: function () {
    if (this._mm) {
      this._mm.removeMessageListener('PDFJS:Child:refreshSettings', this);
      Services.obs.removeObserver(this, 'quit-application');
    }
    this._mm = null;
  },

  /*
   * prefs utilities - the child does not have write access to prefs.
   * note, the pref names here are cross-checked against a list of
   * approved pdfjs prefs in chrome utils.
   */

  clearUserPref: function (aPrefName) {
    this._mm.sendSyncMessage('PDFJS:Parent:clearUserPref', {
      name: aPrefName
    });
  },

  setIntPref: function (aPrefName, aPrefValue) {
    this._mm.sendSyncMessage('PDFJS:Parent:setIntPref', {
      name: aPrefName,
      value: aPrefValue
    });
  },

  setBoolPref: function (aPrefName, aPrefValue) {
    this._mm.sendSyncMessage('PDFJS:Parent:setBoolPref', {
      name: aPrefName,
      value: aPrefValue
    });
  },

  setCharPref: function (aPrefName, aPrefValue) {
    this._mm.sendSyncMessage('PDFJS:Parent:setCharPref', {
      name: aPrefName,
      value: aPrefValue
    });
  },

  setStringPref: function (aPrefName, aPrefValue) {
    this._mm.sendSyncMessage('PDFJS:Parent:setStringPref', {
      name: aPrefName,
      value: aPrefValue
    });
  },

  /*
   * Forwards default app query to the parent where we check various
   * handler app settings only available in the parent process.
   */
  isDefaultHandlerApp: function () {
    return this._mm.sendSyncMessage('PDFJS:Parent:isDefaultHandlerApp')[0];
  },

  /*
   * Request the display of a notification warning in the associated window
   * when the renderer isn't sure a pdf displayed correctly.
   */
  displayWarning: function (aWindow, aMessage, aCallback, aLabel, accessKey) {
    // the child's dom frame mm associated with the window.
    let winmm = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                       .getInterface(Ci.nsIDocShell)
                       .QueryInterface(Ci.nsIInterfaceRequestor)
                       .getInterface(Ci.nsIContentFrameMessageManager);
    winmm.sendAsyncMessage('PDFJS:Parent:displayWarning', {
      message: aMessage,
      label: aLabel,
      accessKey: accessKey
    }, {
      callback: aCallback
    });
  },

  /*
   * Events
   */

  observe: function(aSubject, aTopic, aData) {
    if (aTopic === 'quit-application') {
      this.uninit();
    }
  },

  receiveMessage: function (aMsg) {
    switch (aMsg.name) {
      case 'PDFJS:Child:refreshSettings':
        // Only react to this if we are remote.
        if (Services.appinfo.processType ===
            Services.appinfo.PROCESS_TYPE_CONTENT) {
          let jsm = 'resource://pdf.js/PdfJs.jsm';
          let pdfjs = Components.utils.import(jsm, {}).PdfJs;
          pdfjs.updateRegistration();
        }
        break;
    }
  },

  /*
   * CPOWs
   */

  getChromeWindow: function (aWindow) {
    let winmm = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                        .getInterface(Ci.nsIDocShell)
                        .sameTypeRootTreeItem
                        .QueryInterface(Ci.nsIDocShell)
                        .QueryInterface(Ci.nsIInterfaceRequestor)
                        .getInterface(Ci.nsIContentFrameMessageManager);
    // Sync calls don't support cpow wrapping of returned results, so we
    // send over a small container for the object we want.
    let suitcase = {
      _window: null,
      setChromeWindow: function (aObj) {
        this._window = aObj;
      }
    };
    if (!winmm.sendSyncMessage('PDFJS:Parent:getChromeWindow', {},
                               { suitcase: suitcase })[0]) {
      Cu.reportError('A request for a CPOW wrapped chrome window ' +
                     'failed for unknown reasons.');
      return null;
    }
    return suitcase._window;
  },

  getFindBar: function (aWindow) {
    let winmm = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                        .getInterface(Ci.nsIDocShell)
                        .sameTypeRootTreeItem
                        .QueryInterface(Ci.nsIDocShell)
                        .QueryInterface(Ci.nsIInterfaceRequestor)
                        .getInterface(Ci.nsIContentFrameMessageManager);
    let suitcase = {
      _findbar: null,
      setFindBar: function (aObj) {
        this._findbar = aObj;
      }
    };
    if (!winmm.sendSyncMessage('PDFJS:Parent:getFindBar', {},
                               { suitcase: suitcase })[0]) {
      Cu.reportError('A request for a CPOW wrapped findbar ' +
                     'failed for unknown reasons.');
      return null;
    }
    return suitcase._findbar;
  }
};