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 6 // This file provides common functions for media actions. 7 window.__findMediaElements = function(selector) { 8 // Returns elements matching the selector, otherwise returns the first video 9 // or audio tag element that can be found. 10 // If selector == 'all', returns all media elements. 11 if (selector == 'all') { 12 return document.querySelectorAll('video, audio'); 13 } else if (selector) { 14 return document.querySelectorAll(selector); 15 } else { 16 var media = document.getElementsByTagName('video'); 17 if (media.length > 0) { 18 return [media[0]]; 19 } else { 20 media = document.getElementsByTagName('audio'); 21 if (media.length > 0) { 22 return [media[0]]; 23 } 24 } 25 } 26 console.error('Could not find any media elements matching: ' + selector); 27 return []; 28 }; 29 30 window.__hasEventCompleted = function(selector, event_name) { 31 // Return true if the event_name fired for media satisfying the selector. 32 var mediaElements = window.__findMediaElements(selector); 33 for (var i = 0; i < mediaElements.length; i++) { 34 if (!mediaElements[i][event_name + '_completed']) 35 return false; 36 } 37 return true; 38 }; 39
