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.
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);
16 var media = document.getElementsByTagName('video');
17 if (media.length > 0) {
20 media = document.getElementsByTagName('audio');
21 if (media.length > 0) {
26 console.error('Could not find any media elements matching: ' + selector);
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'])
40 window.__registerHTML5ErrorEvents = function(element) {
41 // Listens to HTML5 media errors.
43 window.__error = 'Media error: ' + e.type + ', code:' + e.target.error.code;
44 throw new Error(window.__error);
46 element.addEventListener('error', onError);
47 element.addEventListener('abort', onError);
50 window.__registerHTML5EventCompleted = function(element, event_name) {
51 // Logs |even_name| on element when completed.
52 var logEventHappened = function(e) {
53 element[e.type + '_completed'] = true;
54 element.removeEventListener(event_name, logEventHappened);
56 element.addEventListener(event_name, logEventHappened);
59 window.__error = null;