ecomp-sdk-app/src/main/webapp/app/fusion/scripts/webrtc/getSourceId.html

   1
   2 <script>
   3
   4 var DetectRTC = {};
   5
   6 var screenCallback;
   7
   8 DetectRTC.screen = {
   9     chromeMediaSource: 'screen',
  10     getSourceId: function (callback) {
  11         screenCallback = callback;
  12         window.postMessage('get-sourceId', '*');
  13     },
  14     onMessageCallback: function (data) {
  15         // "cancel" button is clicked
  16         if (data == 'PermissionDeniedError') {
  17             DetectRTC.screen.chromeMediaSource = 'PermissionDeniedError';
  18             if (screenCallback) return screenCallback('PermissionDeniedError');
  19             else throw new Error('PermissionDeniedError');
  20         }
  21
  22         // extension notified his presence
  23         if (data == 'rtcmulticonnection-extension-loaded') {
  24             DetectRTC.screen.chromeMediaSource = 'desktop';
  25         }
  26
  27         // extension shared temp sourceId
  28         if (data.sourceId) {
  29             DetectRTC.screen.sourceId = data.sourceId;
  30             if (screenCallback) screenCallback(DetectRTC.screen.sourceId);
  31         }
  32     },
  33     getChromeExtensionStatus: function (callback) {
  34         // https://chrome.google.com/webstore/detail/screen-capturing-private/icgmlogfeajbfdffajhoebcfbibfhaen
  35         var extensionid = 'icgmlogfeajbfdffajhoebcfbibfhaen';
  36
  37         var image = document.createElement('img');
  38         image.src = 'chrome-extension://' + extensionid + '/icon.png';
  39         image.onload = function () {
  40             DetectRTC.screen.chromeMediaSource = 'screen';
  41             window.postMessage('are-you-there', '*');
  42             setTimeout(function () {
  43                 if (DetectRTC.screen.chromeMediaSource == 'screen') {
  44                     callback('installed-disabled');
  45                 } else callback('installed-enabled');
  46             }, 2000);
  47         };
  48         image.onerror = function () {
  49             callback('not-installed');
  50         };
  51     }
  52 };
  53
  54 window.addEventListener('message', function (event) {
  55     if (!event.data || !(typeof event.data == 'string' || event.data.sourceId || event.data.captureSourceId)) return;
  56     if (event.data.captureSourceId) captureSourceId();
  57
  58     DetectRTC.screen.onMessageCallback(event.data);
  59 });
  60
  61 function captureSourceId() {
  62     // check if desktop-capture extension installed.
  63     DetectRTC.screen.getChromeExtensionStatus(function (status) {
  64         if (status != 'installed-enabled') {
  65             window.parent.postMessage({
  66                 chromeExtensionStatus: status
  67             }, '*');
  68             return;
  69         }
  70
  71         DetectRTC.screen.getSourceId(function (sourceId) {
  72             window.parent.postMessage({
  73                 chromeMediaSourceId: sourceId
  74             }, '*');
  75         });
  76     });
  77 }
  78 </script>