chrome/renderer/resources/extensions/webrtc_desktop_capture_private_custom_bindings.js

   1 // Copyright 2015 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 webrtcDesktopCapturePrivate API.
   6
   7 var binding = require('binding').Binding.create('webrtcDesktopCapturePrivate');
   8 var sendRequest = require('sendRequest').sendRequest;
   9 var idGenerator = requireNative('id_generator');
  10
  11 binding.registerCustomHook(function(bindingsAPI) {
  12   var apiFunctions = bindingsAPI.apiFunctions;
  13
  14   var pendingRequests = {};
  15
  16   function onRequestResult(id, result) {
  17     if (id in pendingRequests) {
  18       var callback = pendingRequests[id];
  19       delete pendingRequests[id];
  20       callback(result);
  21     }
  22   }
  23
  24   apiFunctions.setHandleRequest('chooseDesktopMedia',
  25                                 function(sources, request, callback) {
  26     var id = idGenerator.GetNextId();
  27     pendingRequests[id] = callback;
  28     sendRequest(this.name,
  29                 [id, sources, request, onRequestResult.bind(null, id)],
  30                 this.definition.parameters, {});
  31     return id;
  32   });
  33
  34   apiFunctions.setHandleRequest('cancelChooseDesktopMedia', function(id) {
  35     if (id in pendingRequests) {
  36       delete pendingRequests[id];
  37       sendRequest(this.name, [id], this.definition.parameters, {});
  38     }
  39   });
  40 });
  41
  42 exports.binding = binding.generate();