WordPress/wp-includes/js/mediaelement/wp-playlist.js

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/*globals window, document, jQuery, _, Backbone, _wpmejsSettings */
(function ($, _, Backbone) {
"use strict";
var WPPlaylistView = Backbone.View.extend({
index : 0,
itemTemplate : wp.template('wp-playlist-item'),
initialize : function () {
var settings = {};
this.data = $.parseJSON( this.$('script').html() );
this.playerNode = this.$( this.data.type );
this.tracks = new Backbone.Collection( this.data.tracks );
this.current = this.tracks.first();
if ( 'audio' === this.data.type ) {
this.currentTemplate = wp.template('wp-playlist-current-item');
this.currentNode = this.$( '.wp-playlist-current-item' );
}
this.renderCurrent();
if ( this.data.tracklist ) {
this.playingClass = 'wp-playlist-playing';
this.renderTracks();
}
this.playerNode.attr( 'src', this.current.get('src') );
_.bindAll( this, 'bindPlayer', 'ended', 'clickTrack' );
if ( ! _.isUndefined( window._wpmejsSettings ) ) {
settings.pluginPath = _wpmejsSettings.pluginPath;
}
settings.success = this.bindPlayer;
new MediaElementPlayer( this.playerNode.get(0), settings );
},
renderCurrent : function () {
var dimensions;
if ( 'video' === this.data.type ) {
if ( this.data.images && this.current.get( 'image' ) ) {
this.playerNode.attr( 'poster', this.current.get( 'image' ).src );
}
dimensions = this.current.get( 'dimensions' ).resized;
this.playerNode.attr( dimensions );
} else {
if ( ! this.data.images ) {
this.current.set( 'image', false );
}
this.currentNode.html( this.currentTemplate( this.current.toJSON() ) );
}
},
renderTracks : function () {
var self = this, i = 1, tracklist = $( '<div class="wp-playlist-tracks"></div>' );
this.tracks.each(function (model) {
if ( ! self.data.images ) {
model.set( 'image', false );
}
model.set( 'artists', self.data.artists );
model.set( 'index', self.data.tracknumbers ? i : false );
tracklist.append( self.itemTemplate( model.toJSON() ) );
i += 1;
});
this.$el.append( tracklist );
this.$( '.wp-playlist-item' ).eq(0).addClass( this.playingClass );
},
events : {
'click .wp-playlist-item' : 'clickTrack',
'click .wp-playlist-next' : 'next',
'click .wp-playlist-prev' : 'prev'
},
bindPlayer : function (mejs) {
this.player = mejs;
this.player.addEventListener( 'ended', this.ended );
},
clickTrack : function (e) {
this.index = this.$( '.wp-playlist-item' ).index( e.currentTarget );
this.setCurrent();
},
ended : function () {
if ( this.index + 1 < this.tracks.length ) {
this.next();
} else {
this.index = 0;
this.current = this.tracks.at( this.index );
this.loadCurrent();
}
},
next : function () {
this.index = this.index + 1 >= this.tracks.length ? 0 : this.index + 1;
this.setCurrent();
},
prev : function () {
this.index = this.index - 1 < 0 ? this.tracks.length - 1 : this.index - 1;
this.setCurrent();
},
loadCurrent : function () {
this.player.pause();
this.playerNode.attr( 'src', this.current.get( 'src' ) );
this.renderCurrent();
this.player.load();
},
setCurrent : function () {
this.current = this.tracks.at( this.index );
if ( this.data.tracklist ) {
this.$( '.wp-playlist-item' )
.removeClass( this.playingClass )
.eq( this.index )
.addClass( this.playingClass );
}
this.loadCurrent();
this.player.play();
}
});
$(document).ready(function () {
$('.wp-playlist').each(function () {
return new WPPlaylistView({ el: this });
});
});
}(jQuery, _, Backbone));