chrome/test/data/extensions/tray_cast/background.js

   1 // Copyright (c) 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 var backgroundSetup = {}
   6
   7 // If all required activity information is available, then this will return an
   8 // activity structure; otherwise, it will return null. This lets us
   9 // unconditionally assign to the 'activity' field in a JSON object.
  10 tryCreateActivity_ = function(id, title, tabId) {
  11   if (id === undefined || title === undefined || tabId === undefined)
  12     return null;
  13
  14   return {
  15     'id': id,
  16     'title': title,
  17     'tabId': tabId
  18   };
  19 }
  20
  21 var receiversActivities = [];
  22 var sendDevices = function() {
  23   chrome.cast.devicesPrivate.updateDevices(receiversActivities);
  24 }
  25 chrome.cast.devicesPrivate.updateDevicesRequested.addListener(sendDevices);
  26
  27 // Add a new receiver. |activityTitle| and |activityTabId| are optional
  28 // parameters.
  29 var addReceiver = function(id, receiverName, activityTitle, activityTabId) {
  30   receiversActivities.push({
  31     'receiver': {
  32       'id': id,
  33       'name': receiverName
  34     },
  35     'activity': tryCreateActivity_(id, activityTitle, activityTabId)
  36   });
  37
  38   sendDevices();
  39 }
  40
  41 var stopMirroringCalled = false;
  42 chrome.cast.devicesPrivate.stopCast.addListener(function(reason) {
  43   if (reason !== 'user-stop')
  44     throw 'expected reason to be "user-stop"';
  45
  46   var foundActivity = false;
  47   for (item of receiversActivities) {
  48     if (item.activity != null) {
  49       item.activity = null;
  50       foundActivity = true;
  51     }
  52   }
  53   if (foundActivity === false)
  54     throw 'stopMirroring called when there was nothing being mirrored'
  55
  56   stopMirroringCalled = true;
  57   sendDevices();
  58 });
  59
  60
  61 var launchDesktopMirroringReceiverId = '';
  62 chrome.cast.devicesPrivate.startCast.addListener(function(receiverId) {
  63   launchDesktopMirroringReceiverId = receiverId;
  64
  65   var tabTitle = 'Tab Title';
  66   var tabId = 1;
  67
  68   for (item of receiversActivities) {
  69     if (item.receiver.id == receiverId) {
  70       item.activity = tryCreateActivity_(receiverId, tabTitle, tabId);
  71       break;
  72     }
  73   }
  74
  75   sendDevices();
  76 });