1 // Copyright 2013 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 // This file performs actions on media elements. 6 (function() { 7 function playMedia(selector) { 8 // Performs the "Play" action on media satisfying selector. 9 var mediaElements = window.__findMediaElements(selector); 10 for (var i = 0; i < mediaElements.length; i++) { 11 console.log('Playing element: ' + mediaElements[i].src); 12 play(mediaElements[i]); 13 } 14 } 15 16 function play(element) { 17 if (element instanceof HTMLMediaElement) 18 playHTML5Element(element); 19 else 20 throw new Error('Can not play non HTML5 media elements.'); 21 } 22 23 function playHTML5Element(element) { 24 function logEventHappened(e) { 25 element[e.type + '_completed'] = true; 26 } 27 function onError(e) { 28 throw new Error('Error playing media :' + e.type); 29 } 30 element.addEventListener('playing', logEventHappened); 31 element.addEventListener('ended', logEventHappened); 32 element.addEventListener('error', onError); 33 element.addEventListener('abort', onError); 34 35 var willPlayEvent = document.createEvent('Event'); 36 willPlayEvent.initEvent('willPlay', false, false); 37 element.dispatchEvent(willPlayEvent); 38 element.play(); 39 } 40 41 window.__playMedia = playMedia; 42 })(); 43
