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/* global _wpmejsSettings, MediaElementPlayer */ (function ($, _, Backbone) { 'use strict'; /** @namespace wp */ window.wp = window.wp || {}; var WPPlaylistView = Backbone.View.extend(/** @lends WPPlaylistView.prototype */{ /** * @constructs * * @param {Object} options The options to create this playlist view with. * @param {Object} options.metadata The metadata */ initialize : function (options) { this.index = 0; this.settings = {}; this.data = options.metadata || $.parseJSON( this.$('script.wp-playlist-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.itemTemplate = wp.template( 'wp-playlist-item' ); this.playingClass = 'wp-playlist-playing'; this.renderTracks(); } this.playerNode.attr( 'src', this.current.get( 'src' ) ); _.bindAll( this, 'bindPlayer', 'bindResetPlayer', 'setPlayer', 'ended', 'clickTrack' ); if ( ! _.isUndefined( window._wpmejsSettings ) ) { this.settings = _.clone( _wpmejsSettings ); } this.settings.success = this.bindPlayer; this.setPlayer(); }, bindPlayer : function (mejs) { this.mejs = mejs; this.mejs.addEventListener( 'ended', this.ended ); }, bindResetPlayer : function (mejs) { this.bindPlayer( mejs ); this.playCurrentSrc(); }, setPlayer: function (force) { if ( this.player ) { this.player.pause(); this.player.remove(); this.playerNode = this.$( this.data.type ); } if (force) { this.playerNode.attr( 'src', this.current.get( 'src' ) ); this.settings.success = this.bindResetPlayer; } // This is also our bridge to the outside world. this.player = new MediaElementPlayer( this.playerNode.get(0), this.settings ); }, playCurrentSrc : function () { this.renderCurrent(); this.mejs.setSrc( this.playerNode.attr( 'src' ) ); this.mejs.load(); this.mejs.play(); }, renderCurrent : function () { var dimensions, defaultImage = 'wp-includes/images/media/video.svg'; if ( 'video' === this.data.type ) { if ( this.data.images && this.current.get( 'image' ) && -1 === this.current.get( 'image' ).src.indexOf( defaultImage ) ) { this.playerNode.attr( 'poster', this.current.get( 'image' ).src ); } dimensions = this.current.get( 'dimensions' ); if ( dimensions && dimensions.resized ) { this.playerNode.attr( dimensions.resized ); } } 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.$( '.wp-playlist-item' ).eq(0).addClass( this.playingClass ); }, events : { 'click .wp-playlist-item' : 'clickTrack', 'click .wp-playlist-next' : 'next', 'click .wp-playlist-prev' : 'prev' }, clickTrack : function (e) { e.preventDefault(); this.index = this.$( '.wp-playlist-item' ).index( e.currentTarget ); this.setCurrent(); }, ended : function () { if ( this.index + 1 < this.tracks.length ) { this.next(); } else { this.index = 0; this.setCurrent(); } }, 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 () { var last = this.playerNode.attr( 'src' ) && this.playerNode.attr( 'src' ).split('.').pop(), current = this.current.get( 'src' ).split('.').pop(); this.mejs && this.mejs.pause(); if ( last !== current ) { this.setPlayer( true ); } else { this.playerNode.attr( 'src', this.current.get( 'src' ) ); this.playCurrentSrc(); } }, 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(); } }); /** * Initialize media playlists in the document. * * Only initializes new playlists not previously-initialized. * * @since 4.9.3 * @return {void} */ function initialize() { $( '.wp-playlist:not(:has(.mejs-container))' ).each( function() { new WPPlaylistView( { el: this } ); } ); } /** * Expose the API publicly on window.wp.playlist. * * @namespace wp.playlist * @since 4.9.3 * @type {object} */ window.wp.playlist = { initialize: initialize }; $( document ).ready( initialize ); window.WPPlaylistView = WPPlaylistView; }(jQuery, _, Backbone));