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YouTube pauser

Pauses youtube videos when they start

  1. // ==UserScript==
  2. // @name       YouTube pauser
  3. // @namespace  http://dannywhittaker.com
  4. // @version    0.1
  5. // @description  Pauses youtube videos when they start
  6. // @match      https://www.youtube.com/watch*
  7. // @copyright  2014, You
  8. // ==/UserScript==
  9.  
  10. (function() {
  11.     // Build a worker from an anonymous function body
  12.     var blobURL = URL.createObjectURL(new Blob(['(',
  13.  
  14.         function() {
  15.             var interval;
  16.  
  17.             self.addEventListener('message', function(e) {
  18.                 switch (e.data) {
  19.                     case 'start':
  20.                         interval = setInterval(function() {
  21.                             self.postMessage('tick');
  22.                         }, 100);
  23.                         break;
  24.                     case 'stop':
  25.                         clearInterval(interval);
  26.                         break;
  27.                 };
  28.             }, false);
  29.         }.toString(),
  30.  
  31.         ')()'
  32.     ], {
  33.         type: 'application/javascript'
  34.     }));
  35.     
  36.     var worker = new Worker(blobURL);
  37.  
  38.     // Won't be needing this anymore
  39.     URL.revokeObjectURL(blobURL);
  40.  
  41.     var playerReference;
  42.  
  43.     var start = new Date().getTime();
  44.     var interval = 50;
  45.  
  46.     function getPlayerReference() {
  47.         if (!playerReference) {
  48.             playerReference = document.getElementById('movie_player');
  49.         }
  50.  
  51.         return playerReference;
  52.     }
  53.  
  54.     function windowIsHidden() {
  55.         return document.hidden;
  56.     }
  57.  
  58.     function clearInterval() {
  59.         worker.postMessage('stop');
  60.     }
  61.  
  62.     function fnInterval() {
  63.         if (new Date().getTime() - start > 1000 * 10) {
  64.             clearInterval();
  65.         } else if (!windowIsHidden()) {
  66.             clearInterval();
  67.         } else {
  68.             try {
  69.                 var ref = getPlayerReference();
  70.                 if (ref && ref.pauseVideo) {
  71.                     ref.pauseVideo();
  72.                 }
  73.             } catch (ex) {}
  74.         }
  75.     }
  76.  
  77.     worker.addEventListener('message', fnInterval);
  78.     worker.postMessage('start');
  79. })();