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', function(name, request, response) {
  13     if (response && request.callback) {
  14       var callback = request.callback;
  15       var options = {};
  16       if (response.audioConstraints)
  17         options.audio = response.audioConstraints;
  18       if (response.videoConstraints)
  19         options.video = response.videoConstraints;
  20
  21       try {
  22         navigator.webkitGetUserMedia(options,
  23                                      function(stream) { callback(stream); },
  24                                      function() { callback(null); });
  25       } catch (e) {
  26         callback(null);
  27       }
  28     } else {
  29       request.callback(null);
  30     }
  31     request.callback = null;
  32   });
  33 });
  34
  35 exports.binding = binding.generate();