// A cross-browser javascript shim for html5 audio
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(function(audiojs, audiojsInstance, container) {
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// Use the path to the audio.js file to create relative paths to the swf and player graphics
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// Remember that some systems (e.g. ruby on rails) append strings like '?1301478336' to asset paths
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var path = (function() {
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var re = new RegExp('audio(\.min)?\.js.*'),
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scripts = document.getElementsByTagName('script');
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for (var i = 0, ii = scripts.length; i < ii; i++) {
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var path = scripts[i].getAttribute('src');
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if(re.test(path))
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{
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var f = path.split ( '/' );
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f.pop ();
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return f.join ( '/' ) + '/';
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}
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}
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// when no script found, an empty string causes the least confusion.
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return '';
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})();
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// ##The audiojs interface
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// This is the global object which provides an interface for creating new `audiojs` instances.
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// It also stores all of the construction helper methods and variables.
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container[audiojs] = {
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instanceCount: 0,
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instances: {},
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// The markup for the swf. It is injected into the page if there is not support for the `<audio>` element. The `$n`s are placeholders.
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// `$1` The name of the flash movie
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// `$2` The path to the swf
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// `$3` Cache invalidation
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flashSource: '\
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<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="$1" width="1" height="1" name="$1" style="position: absolute; left: -1px;"> \
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<param name="movie" value="$2?playerInstance='+audiojs+'.instances[\'$1\']&datetime=$3"> \
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<param name="allowscriptaccess" value="always"> \
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<embed name="$1" src="$2?playerInstance='+audiojs+'.instances[\'$1\']&datetime=$3" width="1" height="1" allowscriptaccess="always"> \
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</object>',
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// ### The main settings object
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// Where all the default settings are stored. Each of these variables and methods can be overwritten by the user-provided `options` object.
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settings: {
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autoplay: false,
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loop: false,
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preload: true,
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imageLocation: path + 'player-graphics.gif',
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retinaImageLocation: path + 'player-graphics@2x.gif',
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swfLocation: path + 'audiojs.swf',
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useFlash: (function() {
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var a = document.createElement('audio');
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return !(a.canPlayType && a.canPlayType('audio/mpeg;').replace(/no/, ''));
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})(),
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hasFlash: (function() {
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if (navigator.plugins && navigator.plugins.length && navigator.plugins['Shockwave Flash']) {
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return true;
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} else if (navigator.mimeTypes && navigator.mimeTypes.length) {
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var mimeType = navigator.mimeTypes['application/x-shockwave-flash'];
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return mimeType && mimeType.enabledPlugin;
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} else {
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try {
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var ax = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
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return true;
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} catch (e) {}
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}
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return false;
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})(),
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// The default markup and classes for creating the player:
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createPlayer: {
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markup: '\
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<div class="play-pause"> \
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<p class="play"></p> \
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<p class="pause"></p> \
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<p class="loading"></p> \
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<p class="error"></p> \
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</div> \
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<div class="scrubber"> \
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<div class="progress"></div> \
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<div class="loaded"></div> \
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</div> \
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<div class="time"> \
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<em class="played">00:00</em>/<strong class="duration">00:00</strong> \
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</div> \
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<div class="error-message"></div>',
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playPauseClass: 'play-pause',
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scrubberClass: 'scrubber',
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progressClass: 'progress',
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loaderClass: 'loaded',
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timeClass: 'time',
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durationClass: 'duration',
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playedClass: 'played',
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errorMessageClass: 'error-message',
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playingClass: 'playing',
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loadingClass: 'loading',
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errorClass: 'error'
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},
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// The css used by the default player. This is is dynamically injected into a `<style>` tag in the top of the head.
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css: '\
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.audiojs audio { position: absolute; left: -1px; } \
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.audiojs { width: 460px; height: 36px; background: #404040; overflow: hidden; font-family: monospace; font-size: 12px; \
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background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #444), color-stop(0.5, #555), color-stop(0.51, #444), color-stop(1, #444)); \
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background-image: -moz-linear-gradient(center top, #444 0%, #555 50%, #444 51%, #444 100%); \
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-webkit-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); -moz-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); \
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-o-box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.3); } \
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.audiojs .play-pause { width: 25px; height: 40px; padding: 4px 6px; margin: 0px; float: left; overflow: hidden; border-right: 1px solid #000; } \
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.audiojs p { display: none; width: 25px; height: 40px; margin: 0px; cursor: pointer; } \
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.audiojs .play { display: block; } \
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.audiojs .scrubber { position: relative; float: left; width: 280px; background: #5a5a5a; height: 14px; margin: 10px; border-top: 1px solid #3f3f3f; border-left: 0px; border-bottom: 0px; overflow: hidden; } \
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.audiojs .progress { position: absolute; top: 0px; left: 0px; height: 14px; width: 0px; background: #ccc; z-index: 1; \
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background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #ccc), color-stop(0.5, #ddd), color-stop(0.51, #ccc), color-stop(1, #ccc)); \
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background-image: -moz-linear-gradient(center top, #ccc 0%, #ddd 50%, #ccc 51%, #ccc 100%); } \
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.audiojs .loaded { position: absolute; top: 0px; left: 0px; height: 14px; width: 0px; background: #000; \
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background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #222), color-stop(0.5, #333), color-stop(0.51, #222), color-stop(1, #222)); \
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background-image: -moz-linear-gradient(center top, #222 0%, #333 50%, #222 51%, #222 100%); } \
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.audiojs .time { float: left; height: 36px; line-height: 36px; margin: 0px 0px 0px 6px; padding: 0px 6px 0px 12px; border-left: 1px solid #000; color: #ddd; text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.5); } \
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.audiojs .time em { padding: 0px 2px 0px 0px; color: #f9f9f9; font-style: normal; } \
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.audiojs .time strong { padding: 0px 0px 0px 2px; font-weight: normal; } \
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.audiojs .error-message { float: left; display: none; margin: 0px 10px; height: 36px; width: 400px; overflow: hidden; line-height: 36px; white-space: nowrap; color: #fff; \
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text-overflow: ellipsis; -o-text-overflow: ellipsis; -icab-text-overflow: ellipsis; -khtml-text-overflow: ellipsis; -moz-text-overflow: ellipsis; -webkit-text-overflow: ellipsis; } \
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.audiojs .error-message a { color: #eee; text-decoration: none; padding-bottom: 1px; border-bottom: 1px solid #999; white-space: wrap; } \
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\
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.audiojs .play { background: url("$1") -2px -1px no-repeat; } \
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.audiojs .loading { background: url("$1") -2px -31px no-repeat; } \
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.audiojs .error { background: url("$1") -2px -61px no-repeat; } \
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.audiojs .pause { background: url("$1") -2px -91px no-repeat; } \
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\
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@media only screen and (-webkit-min-device-pixel-ratio: 2), \
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only screen and (min--moz-device-pixel-ratio: 2), \
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only screen and (min-moz-device-pixel-ratio: 2), \
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only screen and (-o-min-device-pixel-ratio: 2/1), \
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only screen and (min-device-pixel-ratio: 2) { \
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.audiojs .play, .audiojs .loading, .audiojs .error, .audiojs .pause { \
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background-image: url("$2"); \
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-webkit-background-size: 30px 120px; \
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-moz-background-size: 30px 120px; \
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-o-background-size: 30px 120px; \
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background-size: 30px 120px; \
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} \
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} \
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\
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.playing .play, .playing .loading, .playing .error { display: none; } \
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.playing .pause { display: block; } \
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\
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.loading .play, .loading .pause, .loading .error { display: none; } \
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.loading .loading { display: block; } \
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\
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.error .time, .error .play, .error .pause, .error .scrubber, .error .loading { display: none; } \
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.error .error { display: block; } \
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.error .play-pause p { cursor: auto; } \
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.error .error-message { display: block; }',
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// The default event callbacks:
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trackEnded: function(e) {},
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flashError: function() {
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var player = this.settings.createPlayer,
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errorMessage = getByClass(player.errorMessageClass, this.wrapper),
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html = 'Missing <a href="http://get.adobe.com/flashplayer/">flash player</a> plugin.';
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if (this.mp3) html += ' <a href="'+this.mp3+'">Download audio file</a>.';
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container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
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container[audiojs].helpers.addClass(this.wrapper, player.errorClass);
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errorMessage.innerHTML = html;
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},
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loadError: function(e) {
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var player = this.settings.createPlayer,
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errorMessage = getByClass(player.errorMessageClass, this.wrapper);
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container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
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container[audiojs].helpers.addClass(this.wrapper, player.errorClass);
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errorMessage.innerHTML = 'Error loading: "'+this.mp3+'"';
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},
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init: function() {
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var player = this.settings.createPlayer;
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container[audiojs].helpers.addClass(this.wrapper, player.loadingClass);
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},
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loadStarted: function() {
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var player = this.settings.createPlayer,
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duration = getByClass(player.durationClass, this.wrapper),
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m = Math.floor(this.duration / 60),
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s = Math.floor(this.duration % 60);
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container[audiojs].helpers.removeClass(this.wrapper, player.loadingClass);
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duration.innerHTML = ((m<10?'0':'')+m+':'+(s<10?'0':'')+s);
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},
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loadProgress: function(percent) {
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var player = this.settings.createPlayer,
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loaded = getByClass(player.loaderClass, this.wrapper);
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loaded.style.width = Math.round(100 * percent) + '%';
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},
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playPause: function() {
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if (this.playing) this.settings.play();
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else this.settings.pause();
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},
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play: function() {
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var player = this.settings.createPlayer;
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container[audiojs].helpers.removeClass(this.wrapper, player.errorClass);
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container[audiojs].helpers.addClass(this.wrapper, player.playingClass);
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},
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pause: function() {
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var player = this.settings.createPlayer;
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container[audiojs].helpers.removeClass(this.wrapper, player.playingClass);
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},
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updatePlayhead: function(percent) {
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var player = this.settings.createPlayer,
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progress = getByClass(player.progressClass, this.wrapper);
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progress.style.width = Math.round(100 * percent) + '%';
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var played = getByClass(player.playedClass, this.wrapper),
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p = this.duration * percent,
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m = Math.floor(p / 60),
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s = Math.floor(p % 60);
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played.innerHTML = ((m<10?'0':'')+m+':'+(s<10?'0':'')+s);
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}
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},
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// ### Contructor functions
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// `create()`
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// Used to create a single `audiojs` instance.
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// If an array is passed then it calls back to `createAll()`.
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// Otherwise, it creates a single instance and returns it.
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create: function(element, options) {
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var options = options || {}
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if (element.length) {
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return this.createAll(options, element);
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} else {
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return this.newInstance(element, options);
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}
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},
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// `createAll()`
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// Creates multiple `audiojs` instances.
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// If `elements` is `null`, then automatically find any `<audio>` tags on the page and create `audiojs` instances for them.
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createAll: function(options, elements) {
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var audioElements = elements || document.getElementsByTagName('audio'),
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instances = []
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options = options || {};
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for (var i = 0, ii = audioElements.length; i < ii; i++) {
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if ((" " + audioElements[i].parentNode.className + " ").replace(/[\n\t]/g, " ").indexOf(" audiojs ") > -1)
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continue;
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instances.push(this.newInstance(audioElements[i], options));
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}
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return instances;
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},
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// ### Creating and returning a new instance
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// This goes through all the steps required to build out a usable `audiojs` instance.
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newInstance: function(element, options) {
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var element = element,
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s = this.helpers.clone(this.settings),
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id = 'audiojs'+this.instanceCount,
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wrapperId = 'audiojs_wrapper'+this.instanceCount,
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instanceCount = this.instanceCount++;
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// Check for `autoplay`, `loop` and `preload` attributes and write them into the settings.
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if (element.getAttribute('autoplay') != null) s.autoplay = true;
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if (element.getAttribute('loop') != null) s.loop = true;
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if (element.getAttribute('preload') == 'none') s.preload = false;
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// Merge the default settings with the user-defined `options`.
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if (options) this.helpers.merge(s, options);
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// Inject the player html if required.
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if (s.createPlayer.markup) element = this.createPlayer(element, s.createPlayer, wrapperId);
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else element.parentNode.setAttribute('id', wrapperId);
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// Return a new `audiojs` instance.
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var audio = new container[audiojsInstance](element, s);
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// If css has been passed in, dynamically inject it into the `<head>`.
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if (s.css) this.helpers.injectCss(audio, s.css);
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// If `<audio>` or mp3 playback isn't supported, insert the swf & attach the required events for it.
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if (s.useFlash && s.hasFlash) {
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this.injectFlash(audio, id);
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this.attachFlashEvents(audio.wrapper, audio);
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} else if (s.useFlash && !s.hasFlash) {
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s.flashError.apply(audio);
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}
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// Attach event callbacks to the new audiojs instance.
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if (!s.useFlash || (s.useFlash && s.hasFlash)) this.attachEvents(audio.wrapper, audio);
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// Store the newly-created `audiojs` instance.
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this.instances[id] = audio;
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return audio;
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},
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// ### Helper methods for constructing a working player
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// Inject a wrapping div and the markup for the html player.
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createPlayer: function(element, player, id) {
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var wrapper = document.createElement('div'),
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newElement = element.cloneNode(true);
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wrapper.setAttribute('class', 'audiojs');
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wrapper.setAttribute('className', 'audiojs');
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wrapper.setAttribute('id', id);
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// Fix IE's broken implementation of `innerHTML` & `cloneNode` for HTML5 elements.
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if (newElement.outerHTML && !document.createElement('audio').canPlayType) {
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newElement = this.helpers.cloneHtml5Node(element);
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wrapper.innerHTML = player.markup;
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wrapper.appendChild(newElement);
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element.outerHTML = wrapper.outerHTML;
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wrapper = document.getElementById(id);
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} else {
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wrapper.appendChild(newElement);
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wrapper.innerHTML = wrapper.innerHTML + player.markup;
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element.parentNode.replaceChild(wrapper, element);
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}
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return wrapper.getElementsByTagName('audio')[0];
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},
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// Attaches useful event callbacks to an `audiojs` instance.
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attachEvents: function(wrapper, audio) {
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if (!audio.settings.createPlayer) return;
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var player = audio.settings.createPlayer,
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playPause = getByClass(player.playPauseClass, wrapper),
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scrubber = getByClass(player.scrubberClass, wrapper);
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container[audiojs].events.addListener(playPause, 'click', function(e) {
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audio.playPause.apply(audio);
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});
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container[audiojs].events.addListener(scrubber, 'click', function(e) {
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var relativeLeft = e.clientX - this.getBoundingClientRect().left;
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audio.skipTo(relativeLeft / scrubber.offsetWidth);
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});
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// _If flash is being used, then the following handlers don't need to be registered._
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if (audio.settings.useFlash) return;
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// Start tracking the load progress of the track.
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container[audiojs].events.trackLoadProgress(audio);
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container[audiojs].events.addListener(audio.element, 'timeupdate', function(e) {
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audio.updatePlayhead.apply(audio);
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});
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container[audiojs].events.addListener(audio.element, 'ended', function(e) {
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audio.trackEnded.apply(audio);
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});
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container[audiojs].events.addListener(audio.source, 'error', function(e) {
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// on error, cancel any load timers that are running.
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clearInterval(audio.readyTimer);
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clearInterval(audio.loadTimer);
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audio.settings.loadError.apply(audio);
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});
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},
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// Flash requires a slightly different API to the `<audio>` element, so this method is used to overwrite the standard event handlers.
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attachFlashEvents: function(element, audio) {
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audio['swfReady'] = false;
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audio['load'] = function(mp3) {
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// If the swf isn't ready yet then just set `audio.mp3`. `init()` will load it in once the swf is ready.
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audio.mp3 = mp3;
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if (audio.swfReady) audio.element.load(mp3);
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}
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audio['loadProgress'] = function(percent, duration) {
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audio.loadedPercent = percent;
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audio.duration = duration;
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audio.settings.loadStarted.apply(audio);
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audio.settings.loadProgress.apply(audio, [percent]);
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}
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audio['skipTo'] = function(percent) {
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if (percent > audio.loadedPercent) return;
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audio.updatePlayhead.call(audio, [percent])
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audio.element.skipTo(percent);
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}
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audio['updatePlayhead'] = function(percent) {
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audio.settings.updatePlayhead.apply(audio, [percent]);
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}
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audio['play'] = function() {
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// If the audio hasn't started preloading, then start it now.
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// Then set `preload` to `true`, so that any tracks loaded in subsequently are loaded straight away.
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if (!audio.settings.preload) {
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audio.settings.preload = true;
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audio.element.init(audio.mp3);
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}
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audio.playing = true;
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// IE doesn't allow a method named `play()` to be exposed through `ExternalInterface`, so lets go with `pplay()`.
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// <http://dev.nuclearrooster.com/2008/07/27/externalinterfaceaddcallback-can-cause-ie-js-errors-with-certain-keyworkds/>
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audio.element.pplay();
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audio.settings.play.apply(audio);
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}
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audio['pause'] = function() {
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audio.playing = false;
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// Use `ppause()` for consistency with `pplay()`, even though it isn't really required.
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audio.element.ppause();
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audio.settings.pause.apply(audio);
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}
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audio['setVolume'] = function(v) {
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audio.element.setVolume(v);
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}
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audio['loadStarted'] = function() {
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// Load the mp3 specified by the audio element into the swf.
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audio.swfReady = true;
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if (audio.settings.preload) audio.element.init(audio.mp3);
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if (audio.settings.autoplay) audio.play.apply(audio);
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}
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},
|
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// ### Injecting an swf from a string
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// Build up the swf source by replacing the `$keys` and then inject the markup into the page.
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injectFlash: function(audio, id) {
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var flashSource = this.flashSource.replace(/\$1/g, id);
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flashSource = flashSource.replace(/\$2/g, audio.settings.swfLocation);
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// `(+new Date)` ensures the swf is not pulled out of cache. The fixes an issue with Firefox running multiple players on the same page.
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flashSource = flashSource.replace(/\$3/g, (+new Date + Math.random()));
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// Inject the player markup using a more verbose `innerHTML` insertion technique that works with IE.
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var html = audio.wrapper.innerHTML,
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div = document.createElement('div');
|
div.innerHTML = flashSource + html;
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audio.wrapper.innerHTML = div.innerHTML;
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audio.element = this.helpers.getSwf(id);
|
},
|
|
// ## Helper functions
|
helpers: {
|
// **Merge two objects, with `obj2` overwriting `obj1`**
|
// The merge is shallow, but that's all that is required for our purposes.
|
merge: function(obj1, obj2) {
|
for (attr in obj2) {
|
if (obj1.hasOwnProperty(attr) || obj2.hasOwnProperty(attr)) {
|
obj1[attr] = obj2[attr];
|
}
|
}
|
},
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// **Clone a javascript object (recursively)**
|
clone: function(obj){
|
if (obj == null || typeof(obj) !== 'object') return obj;
|
var temp = new obj.constructor();
|
for (var key in obj) temp[key] = arguments.callee(obj[key]);
|
return temp;
|
},
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// **Adding/removing classnames from elements**
|
addClass: function(element, className) {
|
var re = new RegExp('(\\s|^)'+className+'(\\s|$)');
|
if (re.test(element.className)) return;
|
element.className += ' ' + className;
|
},
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removeClass: function(element, className) {
|
var re = new RegExp('(\\s|^)'+className+'(\\s|$)');
|
element.className = element.className.replace(re,' ');
|
},
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// **Dynamic CSS injection**
|
// Takes a string of css, inserts it into a `<style>`, then injects it in at the very top of the `<head>`. This ensures any user-defined styles will take precedence.
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injectCss: function(audio, string) {
|
|
// If an `audiojs` `<style>` tag already exists, then append to it rather than creating a whole new `<style>`.
|
var prepend = '',
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styles = document.getElementsByTagName('style'),
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css = string.replace(/\$1/g, audio.settings.imageLocation);
|
css = css.replace(/\$2/g, audio.settings.retinaImageLocation);
|
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for (var i = 0, ii = styles.length; i < ii; i++) {
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var title = styles[i].getAttribute('title');
|
if (title && ~title.indexOf('audiojs')) {
|
style = styles[i];
|
if (style.innerHTML === css) return;
|
prepend = style.innerHTML;
|
break;
|
}
|
};
|
|
var head = document.getElementsByTagName('head')[0],
|
firstchild = head.firstChild,
|
style = document.createElement('style');
|
|
if (!head) return;
|
|
style.setAttribute('type', 'text/css');
|
style.setAttribute('title', 'audiojs');
|
|
if (style.styleSheet) style.styleSheet.cssText = prepend + css;
|
else style.appendChild(document.createTextNode(prepend + css));
|
|
if (firstchild) head.insertBefore(style, firstchild);
|
else head.appendChild(style);
|
},
|
// **Handle all the IE6+7 requirements for cloning `<audio>` nodes**
|
// Create a html5-safe document fragment by injecting an `<audio>` element into the document fragment.
|
cloneHtml5Node: function(audioTag) {
|
var fragment = document.createDocumentFragment(),
|
doc = fragment.createElement ? fragment : document;
|
doc.createElement('audio');
|
var div = doc.createElement('div');
|
fragment.appendChild(div);
|
div.innerHTML = audioTag.outerHTML;
|
return div.firstChild;
|
},
|
// **Cross-browser `<object>` / `<embed>` element selection**
|
getSwf: function(name) {
|
var swf = document[name] || window[name];
|
return swf.length > 1 ? swf[swf.length - 1] : swf;
|
}
|
},
|
// ## Event-handling
|
events: {
|
memoryLeaking: false,
|
listeners: [],
|
// **A simple cross-browser event handler abstraction**
|
addListener: function(element, eventName, func) {
|
// For modern browsers use the standard DOM-compliant `addEventListener`.
|
if (element.addEventListener) {
|
element.addEventListener(eventName, func, false);
|
// For older versions of Internet Explorer, use `attachEvent`.
|
// Also provide a fix for scoping `this` to the calling element and register each listener so the containing elements can be purged on page unload.
|
} else if (element.attachEvent) {
|
this.listeners.push(element);
|
if (!this.memoryLeaking) {
|
window.attachEvent('onunload', function() {
|
if(this.listeners) {
|
for (var i = 0, ii = this.listeners.length; i < ii; i++) {
|
container[audiojs].events.purge(this.listeners[i]);
|
}
|
}
|
});
|
this.memoryLeaking = true;
|
}
|
element.attachEvent('on' + eventName, function() {
|
func.call(element, window.event);
|
});
|
}
|
},
|
|
trackLoadProgress: function(audio) {
|
// If `preload` has been set to `none`, then we don't want to start loading the track yet.
|
if (!audio.settings.preload) return;
|
|
var readyTimer,
|
loadTimer,
|
audio = audio,
|
ios = (/(ipod|iphone|ipad)/i).test(navigator.userAgent);
|
|
// Use timers here rather than the official `progress` event, as Chrome has issues calling `progress` when loading mp3 files from cache.
|
readyTimer = setInterval(function() {
|
if (audio.element.readyState > -1) {
|
// iOS doesn't start preloading the mp3 until the user interacts manually, so this stops the loader being displayed prematurely.
|
if (!ios) audio.init.apply(audio);
|
}
|
if (audio.element.readyState > 1) {
|
if (audio.settings.autoplay) audio.play.apply(audio);
|
clearInterval(readyTimer);
|
// Once we have data, start tracking the load progress.
|
loadTimer = setInterval(function() {
|
audio.loadProgress.apply(audio);
|
if (audio.loadedPercent >= 1) clearInterval(loadTimer);
|
}, 200);
|
}
|
}, 200);
|
audio.readyTimer = readyTimer;
|
audio.loadTimer = loadTimer;
|
},
|
|
// **Douglas Crockford's IE6 memory leak fix**
|
// <http://javascript.crockford.com/memory/leak.html>
|
// This is used to release the memory leak created by the circular references created when fixing `this` scoping for IE. It is called on page unload.
|
purge: function(d) {
|
var a = d.attributes, i;
|
if (a) {
|
for (i = 0; i < a.length; i += 1) {
|
if (typeof d[a[i].name] === 'function') d[a[i].name] = null;
|
}
|
}
|
a = d.childNodes;
|
if (a) {
|
for (i = 0; i < a.length; i += 1) purge(d.childNodes[i]);
|
}
|
},
|
|
// **DOMready function**
|
// As seen here: <https://github.com/dperini/ContentLoaded/>.
|
ready: (function() { return function(fn) {
|
var win = window, done = false, top = true,
|
doc = win.document, root = doc.documentElement,
|
add = doc.addEventListener ? 'addEventListener' : 'attachEvent',
|
rem = doc.addEventListener ? 'removeEventListener' : 'detachEvent',
|
pre = doc.addEventListener ? '' : 'on',
|
init = function(e) {
|
if (e.type == 'readystatechange' && doc.readyState != 'complete') return;
|
(e.type == 'load' ? win : doc)[rem](pre + e.type, init, false);
|
if (!done && (done = true)) fn.call(win, e.type || e);
|
},
|
poll = function() {
|
try { root.doScroll('left'); } catch(e) { setTimeout(poll, 50); return; }
|
init('poll');
|
};
|
if (doc.readyState == 'complete') fn.call(win, 'lazy');
|
else {
|
if (doc.createEventObject && root.doScroll) {
|
try { top = !win.frameElement; } catch(e) { }
|
if (top) poll();
|
}
|
doc[add](pre + 'DOMContentLoaded', init, false);
|
doc[add](pre + 'readystatechange', init, false);
|
win[add](pre + 'load', init, false);
|
}
|
}
|
})()
|
|
}
|
}
|
|
// ## The audiojs class
|
// We create one of these per `<audio>` and then push them into `audiojs['instances']`.
|
container[audiojsInstance] = function(element, settings) {
|
// Each audio instance returns an object which contains an API back into the `<audio>` element.
|
this.element = element;
|
this.wrapper = element.parentNode;
|
this.source = element.getElementsByTagName('source')[0] || element;
|
// First check the `<audio>` element directly for a src and if one is not found, look for a `<source>` element.
|
this.mp3 = (function(element) {
|
var source = element.getElementsByTagName('source')[0];
|
return element.getAttribute('src') || (source ? source.getAttribute('src') : null);
|
})(element);
|
this.settings = settings;
|
this.loadStartedCalled = false;
|
this.loadedPercent = 0;
|
this.duration = 1;
|
this.playing = false;
|
}
|
|
container[audiojsInstance].prototype = {
|
// API access events:
|
// Each of these do what they need do and then call the matching methods defined in the settings object.
|
updatePlayhead: function() {
|
var percent = this.element.currentTime / this.duration;
|
this.settings.updatePlayhead.apply(this, [percent]);
|
},
|
skipTo: function(percent) {
|
if (percent > this.loadedPercent) return;
|
this.element.currentTime = this.duration * percent;
|
this.updatePlayhead();
|
},
|
load: function(mp3) {
|
this.loadStartedCalled = false;
|
this.source.setAttribute('src', mp3);
|
// The now outdated `load()` method is required for Safari 4
|
this.element.load();
|
this.mp3 = mp3;
|
container[audiojs].events.trackLoadProgress(this);
|
},
|
loadError: function() {
|
this.settings.loadError.apply(this);
|
},
|
init: function() {
|
this.settings.init.apply(this);
|
},
|
loadStarted: function() {
|
// Wait until `element.duration` exists before setting up the audio player.
|
if (!this.element.duration) return false;
|
|
this.duration = this.element.duration;
|
this.updatePlayhead();
|
this.settings.loadStarted.apply(this);
|
},
|
loadProgress: function() {
|
if (this.element.buffered != null && this.element.buffered.length) {
|
// Ensure `loadStarted()` is only called once.
|
if (!this.loadStartedCalled) {
|
this.loadStartedCalled = this.loadStarted();
|
}
|
var durationLoaded = this.element.buffered.end(this.element.buffered.length - 1);
|
this.loadedPercent = durationLoaded / this.duration;
|
|
this.settings.loadProgress.apply(this, [this.loadedPercent]);
|
}
|
},
|
playPause: function() {
|
if (this.playing) this.pause();
|
else this.play();
|
},
|
play: function() {
|
var ios = (/(ipod|iphone|ipad)/i).test(navigator.userAgent);
|
// On iOS this interaction will trigger loading the mp3, so run `init()`.
|
if (ios && this.element.readyState == 0) this.init.apply(this);
|
// If the audio hasn't started preloading, then start it now.
|
// Then set `preload` to `true`, so that any tracks loaded in subsequently are loaded straight away.
|
if (!this.settings.preload) {
|
this.settings.preload = true;
|
this.element.setAttribute('preload', 'auto');
|
container[audiojs].events.trackLoadProgress(this);
|
}
|
this.playing = true;
|
this.element.play();
|
this.settings.play.apply(this);
|
},
|
pause: function() {
|
this.playing = false;
|
this.element.pause();
|
this.settings.pause.apply(this);
|
},
|
setVolume: function(v) {
|
this.element.volume = v;
|
},
|
trackEnded: function(e) {
|
this.skipTo.apply(this, [0]);
|
if (!this.settings.loop) this.pause.apply(this);
|
this.settings.trackEnded.apply(this);
|
}
|
}
|
|
// **getElementsByClassName**
|
// Having to rely on `getElementsByTagName` is pretty inflexible internally, so a modified version of Dustin Diaz's `getElementsByClassName` has been included.
|
// This version cleans things up and prefers the native DOM method if it's available.
|
var getByClass = function(searchClass, node) {
|
var matches = [];
|
node = node || document;
|
|
if (node.getElementsByClassName) {
|
matches = node.getElementsByClassName(searchClass);
|
} else {
|
var i, l,
|
els = node.getElementsByTagName("*"),
|
pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
|
|
for (i = 0, l = els.length; i < l; i++) {
|
if (pattern.test(els[i].className)) {
|
matches.push(els[i]);
|
}
|
}
|
}
|
return matches.length > 1 ? matches : matches[0];
|
};
|
// The global variable names are passed in here and can be changed if they conflict with anything else.
|
})('audiojs', 'audiojsInstance', this);
|
