chrome/renderer/resources/extensions/tab_capture_custom_bindings.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Custom binding for the Tab Capture API.
   6
   7 var binding = require('binding').Binding.create('tabCapture');
   8
   9 binding.registerCustomHook(function(bindingsAPI, extensionId) {
  10   var apiFunctions = bindingsAPI.apiFunctions;
  11
  12   apiFunctions.setCustomCallback('capture',
  13       function(name, request, callback, response) {
  14     if (!callback)
  15       return;
  16
  17     if (response) {
  18       var options = {};
  19       if (response.audioConstraints)
  20         options.audio = response.audioConstraints;
  21       if (response.videoConstraints)
  22         options.video = response.videoConstraints;
  23
  24       try {
  25         navigator.webkitGetUserMedia(options,
  26                                      function(stream) { callback(stream); },
  27                                      function() { callback(null); });
  28       } catch (e) {
  29         callback(null);
  30       }
  31     } else {
  32       callback(null);
  33     }
  34   });
  35 });
  36
  37 exports.binding = binding.generate();