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/*!
* jQuery & Zepto Lazy - AV Plugin - v1.4
* http://jquery.eisbehr.de/lazy/
*
* Copyright 2012 - 2018, Daniel 'Eisbehr' Kern
*
* Dual licensed under the MIT and GPL-2.0 licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl-2.0.html
*/
;(function($) {
// loads audio and video tags including tracks by two ways, like:
// <audio>
// <data-src src="audio.ogg" type="video/ogg"></data-src>
// <data-src src="audio.mp3" type="video/mp3"></data-src>
// </audio>
// <video data-poster="poster.jpg">
// <data-src src="video.ogv" type="video/ogv"></data-src>
// <data-src src="video.webm" type="video/webm"></data-src>
// <data-src src="video.mp4" type="video/mp4"></data-src>
// <data-track kind="captions" src="captions.vtt" srclang="en"></data-track>
// <data-track kind="descriptions" src="descriptions.vtt" srclang="en"></data-track>
// <data-track kind="subtitles" src="subtitles.vtt" srclang="de"></data-track>
// </video>
//
// or:
// <audio data-src="audio.ogg|video/ogg,video.mp3|video/mp3"></video>
// <video data-poster="poster.jpg" data-src="video.ogv|video/ogv,video.webm|video/webm,video.mp4|video/mp4">
// <data-track kind="captions" src="captions.vtt" srclang="en"></data-track>
// <data-track kind="descriptions" src="descriptions.vtt" srclang="en"></data-track>
// <data-track kind="subtitles" src="subtitles.vtt" srclang="de"></data-track>
// </video>
$.lazy(['av', 'audio', 'video'], ['audio', 'video'], function(element, response) {
var elementTagName = element[0].tagName.toLowerCase();
if (elementTagName === 'audio' || elementTagName === 'video') {
var srcAttr = 'data-src',
sources = element.find(srcAttr),
tracks = element.find('data-track'),
sourcesInError = 0,
// create on error callback for sources
onError = function() {
if (++sourcesInError === sources.length) {
response(false);
}
},
// create callback to handle a source or track entry
handleSource = function() {
var source = $(this),
type = source[0].tagName.toLowerCase(),
attributes = source.prop('attributes'),
target = $(type === srcAttr ? '<source>' : '<track>');
if (type === srcAttr) {
target.one('error', onError);
}
$.each(attributes, function(index, attribute) {
target.attr(attribute.name, attribute.value);
});
source.replaceWith(target);
};
// create event for successfull load
element.one('loadedmetadata', function() {
response(true);
})
// remove default callbacks to ignore loading poster image
.off('load error')
// load poster image
.attr('poster', element.attr('data-poster'));
// load by child tags
if (sources.length) {
sources.each(handleSource);
}
// load by attribute
else if (element.attr(srcAttr)) {
// split for every entry by comma
$.each(element.attr(srcAttr).split(','), function(index, value) {
// split again for file and file type
var parts = value.split('|');
// create a source entry
element.append($('<source>')
.one('error', onError)
.attr({src: parts[0].trim(), type: parts[1].trim()}));
});
// remove now obsolete attribute
if (this.config('removeAttribute')) {
element.removeAttr(srcAttr);
}
}
else {
// pass error state
// use response function for Zepto
response(false);
}
// load optional tracks
if (tracks.length) {
tracks.each(handleSource);
}
}
else {
// pass error state
// use response function for Zepto
response(false);
}
});
})(window.jQuery || window.Zepto);