The Tor Browser: webapprt/WebRTCHandler.jsm@4ab42b5ab56c

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 "use strict";

     7 this.EXPORTED_SYMBOLS = [];

     9 let Cc = Components.classes;

    10 let Ci = Components.interfaces;

    11 let Cu = Components.utils;

    13 Cu.import("resource://gre/modules/Services.jsm");

    14 Cu.import("resource://gre/modules/XPCOMUtils.jsm");

    16 function handleRequest(aSubject, aTopic, aData) {

    17   let { windowID, callID } = aSubject;

    18   let constraints = aSubject.getConstraints();

    19   let contentWindow = Services.wm.getOuterWindowWithId(windowID);

    21   contentWindow.navigator.mozGetUserMediaDevices(

    22     constraints,

    23     function (devices) {

    24       prompt(contentWindow, callID, constraints.audio,

    25              constraints.video || constraints.picture,

    26              devices);

    27     },

    28     function (error) {

    29       denyRequest(callID, error);

    30     });

    31 }

    33 function prompt(aWindow, aCallID, aAudioRequested, aVideoRequested, aDevices) {

    34   let audioDevices = [];

    35   let videoDevices = [];

    36   for (let device of aDevices) {

    37     device = device.QueryInterface(Ci.nsIMediaDevice);

    38     switch (device.type) {

    39       case "audio":

    40         if (aAudioRequested) {

    41           audioDevices.push(device);

    42         }

    43         break;

    45       case "video":

    46         if (aVideoRequested) {

    47           videoDevices.push(device);

    48         }

    49         break;

    50     }

    51   }

    53   if (audioDevices.length == 0 && videoDevices.length == 0) {

    54     denyRequest(aCallID);

    55     return;

    56   }

    58   let params = {

    59                  videoDevices: videoDevices,

    60                  audioDevices: audioDevices,

    61                  out: null

    62                };

    63   aWindow.openDialog("chrome://webapprt/content/getUserMediaDialog.xul", "",

    64                      "chrome, dialog, modal", params).focus();

    66   if (!params.out) {

    67     denyRequest(aCallID);

    68     return;

    69   }

    71   let allowedDevices = Cc["@mozilla.org/supports-array;1"].

    72                        createInstance(Ci.nsISupportsArray);

    73   let videoIndex = params.out.video;

    74   let audioIndex = params.out.audio;

    76   if (videoIndex != -1) {

    77     allowedDevices.AppendElement(videoDevices[videoIndex]);

    78   }

    80   if (audioIndex != -1) {

    81     allowedDevices.AppendElement(audioDevices[audioIndex]);

    82   }

    84   if (allowedDevices.Count()) {

    85     Services.obs.notifyObservers(allowedDevices, "getUserMedia:response:allow",

    86                                  aCallID);

    87   } else {

    88     denyRequest(aCallID);

    89   }

    90 }

    92 function denyRequest(aCallID, aError) {

    93   let msg = null;

    94   if (aError) {

    95     msg = Cc["@mozilla.org/supports-string;1"].

    96           createInstance(Ci.nsISupportsString);

    97     msg.data = aError;

    98   }

   100   Services.obs.notifyObservers(msg, "getUserMedia:response:deny", aCallID);

   101 }

   103 Services.obs.addObserver(handleRequest, "getUserMedia:request", false);

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