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/*
* Playlist Object for the jPlayer Plugin
* http://www.jplayer.org
*
* Copyright (c) 2009 - 2014 Happyworm Ltd
* Licensed under the MIT license.
* http://www.opensource.org/licenses/MIT
*
* Author: Mark J Panaghiston
* Version: 2.4.1
* Date: 19th November 2014
*
* Requires:
* - jQuery 1.7.0+
* - jPlayer 2.8.2+
*/
/*global jPlayerPlaylist:true */
(function($, undefined) {
jPlayerPlaylist = function(cssSelector, playlist, options) {
var self = this;
var doc = document;
this.current = 0;
this.loop = false; // Flag used with the jPlayer repeat event
this.shuffled = false;
this.removing = false; // Flag is true during remove animation, disabling the remove() method until complete.
this.cssSelector = $.extend({}, this._cssSelector, cssSelector); // Object: Containing the css selectors for jPlayer and its cssSelectorAncestor
this.options = $.extend(true, {
keyBindings: {
next: {
key: 221, // ]
fn: function() {
self.next();
}
},
previous: {
key: 219, // [
fn: function() {
self.previous();
}
},
shuffle: {
key: 83, // s
fn: function() {
self.shuffle();
}
}
},
stateClass: {
shuffled: "jp-state-shuffled"
}
}, this._options, options); // Object: The jPlayer constructor options for this playlist and the playlist options
this.playlist = []; // Array of Objects: The current playlist displayed (Un-shuffled or Shuffled)
this.original = []; // Array of Objects: The original playlist
this._initPlaylist(playlist); // Copies playlist to this.original. Then mirrors this.original to this.playlist. Creating two arrays, where the element pointers match. (Enables pointer comparison.)
// Setup the css selectors for the extra interface items used by the playlist.
this.cssSelector.details = this.cssSelector.cssSelectorAncestor + " .jp-details"; // Note that jPlayer controls the text in the title element.
this.cssSelector.playlist = this.cssSelector.cssSelectorAncestor + " .jp-playlist";
this.cssSelector.next = this.cssSelector.cssSelectorAncestor + " .jp-next";
this.cssSelector.previous = this.cssSelector.cssSelectorAncestor + " .jp-previous";
this.cssSelector.shuffle = this.cssSelector.cssSelectorAncestor + " .jp-shuffle";
this.cssSelector.shuffleOff = this.cssSelector.cssSelectorAncestor + " .jp-shuffle-off";
// Override the cssSelectorAncestor given in options
this.options.cssSelectorAncestor = this.cssSelector.cssSelectorAncestor;
// Override the default repeat event handler
this.options.repeat = function(event) {
self.loop = event.jPlayer.options.loop;
};
// Create a ready event handler to initialize the playlist
$(this.cssSelector.jPlayer).bind($.jPlayer.event.ready, function() {
self._init();
});
// Create an ended event handler to move to the next item
$(this.cssSelector.jPlayer).bind($.jPlayer.event.ended, function() {
self.next();
});
// Create a play event handler to pause other instances
$(this.cssSelector.jPlayer).bind($.jPlayer.event.play, function() {
$(this).jPlayer("pauseOthers");
});
// Create a resize event handler to show the title in full screen mode.
$(this.cssSelector.jPlayer).bind($.jPlayer.event.resize, function(event) {
if(event.jPlayer.options.fullScreen) {
$(self.cssSelector.details).show();
} else {
$(self.cssSelector.details).hide();
}
});
// Create click handlers for the extra buttons that do playlist functions.
$(this.cssSelector.previous).click(function(e) {
e.preventDefault();
self.previous();
self.blur(this);
});
$(this.cssSelector.next).click(function(e) {
e.preventDefault();
self.next();
self.blur(this);
});
$(this.cssSelector.shuffle).click(function(e) {
e.preventDefault();
if(self.shuffled && $(self.cssSelector.jPlayer).jPlayer("option", "useStateClassSkin")) {
self.shuffle(false);
} else {
self.shuffle(true);
}
self.blur(this);
});
$(this.cssSelector.shuffleOff).click(function(e) {
e.preventDefault();
self.shuffle(false);
self.blur(this);
}).hide();
// Put the title in its initial display state
if(!this.options.fullScreen) {
$(this.cssSelector.details).hide();
}
// Remove the empty <li> from the page HTML. Allows page to be valid HTML, while not interfereing with display animations
$(this.cssSelector.playlist + " ul").empty();
// Create .on() handlers for the playlist items along with the free media and remove controls.
this._createItemHandlers();
// Instance jPlayer
$(this.cssSelector.jPlayer).jPlayer(this.options);
};
jPlayerPlaylist.prototype = {
_cssSelector: { // static object, instanced in constructor
jPlayer: "#jquery_jplayer_1",
cssSelectorAncestor: "#jp_container_1"
},
_options: { // static object, instanced in constructor
playlistOptions: {
autoPlay: false,
loopOnPrevious: false,
shuffleOnLoop: true,
enableRemoveControls: false,
displayTime: 'slow',
addTime: 'fast',
removeTime: 'fast',
shuffleTime: 'slow',
itemClass: "jp-playlist-item",
freeGroupClass: "jp-free-media",
freeItemClass: "jp-playlist-item-free",
removeItemClass: "jp-playlist-item-remove"
}
},
option: function(option, value) { // For changing playlist options only
if(value === undefined) {
return this.options.playlistOptions[option];
}
this.options.playlistOptions[option] = value;
switch(option) {
case "enableRemoveControls":
this._updateControls();
break;
case "itemClass":
case "freeGroupClass":
case "freeItemClass":
case "removeItemClass":
this._refresh(true); // Instant
this._createItemHandlers();
break;
}
return this;
},
_init: function() {
var self = this;
this._refresh(function() {
if(self.options.playlistOptions.autoPlay) {
self.play(self.current);
} else {
self.select(self.current);
}
});
},
_initPlaylist: function(playlist) {
this.current = 0;
this.shuffled = false;
this.removing = false;
this.original = $.extend(true, [], playlist); // Copy the Array of Objects
this._originalPlaylist();
},
_originalPlaylist: function() {
var self = this;
this.playlist = [];
// Make both arrays point to the same object elements. Gives us 2 different arrays, each pointing to the same actual object. ie., Not copies of the object.
$.each(this.original, function(i) {
self.playlist[i] = self.original[i];
});
},
_refresh: function(instant) {
/* instant: Can be undefined, true or a function.
* undefined -> use animation timings
* true -> no animation
* function -> use animation timings and excute function at half way point.
*/
var self = this;
if(instant && !$.isFunction(instant)) {
$(this.cssSelector.playlist + " ul").empty();
$.each(this.playlist, function(i) {
$(self.cssSelector.playlist + " ul").append(self._createListItem(self.playlist[i]));
});
this._updateControls();
} else {
var displayTime = $(this.cssSelector.playlist + " ul").children().length ? this.options.playlistOptions.displayTime : 0;
$(this.cssSelector.playlist + " ul").slideUp(displayTime, function() {
var $this = $(this);
$(this).empty();
$.each(self.playlist, function(i) {
$this.append(self._createListItem(self.playlist[i]));
});
self._updateControls();
if($.isFunction(instant)) {
instant();
}
if(self.playlist.length) {
$(this).slideDown(self.options.playlistOptions.displayTime);
} else {
$(this).show();
}
});
}
},
_createListItem: function(media) {
var self = this;
// Wrap the <li> contents in a <div>
var listItem = "<li><div>";
// Create remove control
listItem += "<a href='javascript:;' class='" + this.options.playlistOptions.removeItemClass + "'>×</a>";
// Create links to free media
if(media.free) {
var first = true;
listItem += "<span class='" + this.options.playlistOptions.freeGroupClass + "'>(";
$.each(media, function(property,value) {
if($.jPlayer.prototype.format[property]) { // Check property is a media format.
if(first) {
first = false;
} else {
listItem += " | ";
}
listItem += "<a class='" + self.options.playlistOptions.freeItemClass + "' href='" + value + "' tabindex='-1'>" + property + "</a>";
}
});
listItem += ")</span>";
}
// The title is given next in the HTML otherwise the float:right on the free media corrupts in IE6/7
listItem += "<a href='javascript:;' class='" + this.options.playlistOptions.itemClass + "' tabindex='0'>" + media.title + (media.artist ? " <span class='jp-artist'>by " + media.artist + "</span>" : "") + "</a>";
listItem += "</div></li>";
return listItem;
},
_createItemHandlers: function() {
var self = this;
// Create live handlers for the playlist items
$(this.cssSelector.playlist).off("click", "a." + this.options.playlistOptions.itemClass).on("click", "a." + this.options.playlistOptions.itemClass, function(e) {
e.preventDefault();
var index = $(this).parent().parent().index();
if(self.current !== index) {
self.play(index);
scrollJS(index);
} else {
$(self.cssSelector.jPlayer).jPlayer("play");
}
self.blur(this);
});
// Create live handlers that disable free media links to force access via right click
$(this.cssSelector.playlist).off("click", "a." + this.options.playlistOptions.freeItemClass).on("click", "a." + this.options.playlistOptions.freeItemClass, function(e) {
e.preventDefault();
$(this).parent().parent().find("." + self.options.playlistOptions.itemClass).click();
self.blur(this);
});
// Create live handlers for the remove controls
$(this.cssSelector.playlist).off("click", "a." + this.options.playlistOptions.removeItemClass).on("click", "a." + this.options.playlistOptions.removeItemClass, function(e) {
e.preventDefault();
var index = $(this).parent().parent().index();
self.remove(index);
self.blur(this);
});
},
_updateControls: function() {
if(this.options.playlistOptions.enableRemoveControls) {
$(this.cssSelector.playlist + " ." + this.options.playlistOptions.removeItemClass).show();
} else {
$(this.cssSelector.playlist + " ." + this.options.playlistOptions.removeItemClass).hide();
}
if(this.shuffled) {
$(this.cssSelector.jPlayer).jPlayer("addStateClass", "shuffled");
} else {
$(this.cssSelector.jPlayer).jPlayer("removeStateClass", "shuffled");
}
if($(this.cssSelector.shuffle).length && $(this.cssSelector.shuffleOff).length) {
if(this.shuffled) {
$(this.cssSelector.shuffleOff).show();
$(this.cssSelector.shuffle).hide();
} else {
$(this.cssSelector.shuffleOff).hide();
$(this.cssSelector.shuffle).show();
}
}
},
_highlight: function(index) {
if(this.playlist.length && index !== undefined) {
$(this.cssSelector.playlist + " .jp-playlist-current").removeClass("jp-playlist-current");
$(this.cssSelector.playlist + " li:nth-child(" + (index + 1) + ")").addClass("jp-playlist-current").find(".jp-playlist-item").addClass("jp-playlist-current");
// $(this.cssSelector.details + " li").html("<span class='jp-title'>" + this.playlist[index].title + "</span>" + (this.playlist[index].artist ? " <span class='jp-artist'>by " + this.playlist[index].artist + "</span>" : ""));
}
},
setPlaylist: function(playlist) {
this._initPlaylist(playlist);
this._init();
},
add: function(media, playNow) {
$(this.cssSelector.playlist + " ul").append(this._createListItem(media)).find("li:last-child").hide().slideDown(this.options.playlistOptions.addTime);
this._updateControls();
this.original.push(media);
this.playlist.push(media); // Both array elements share the same object pointer. Comforms with _initPlaylist(p) system.
if(playNow) {
this.play(this.playlist.length - 1);
} else {
if(this.original.length === 1) {
this.select(0);
scrollJS(0);
}
}
},
remove: function(index) {
var self = this;
if(index === undefined) {
this._initPlaylist([]);
this._refresh(function() {
$(self.cssSelector.jPlayer).jPlayer("clearMedia");
});
return true;
} else {
if(this.removing) {
return false;
} else {
index = (index < 0) ? self.original.length + index : index; // Negative index relates to end of array.
if(0 <= index && index < this.playlist.length) {
this.removing = true;
$(this.cssSelector.playlist + " li:nth-child(" + (index + 1) + ")").slideUp(this.options.playlistOptions.removeTime, function() {
$(this).remove();
if(self.shuffled) {
var item = self.playlist[index];
$.each(self.original, function(i) {
if(self.original[i] === item) {
self.original.splice(i, 1);
return false; // Exit $.each
}
});
self.playlist.splice(index, 1);
} else {
self.original.splice(index, 1);
self.playlist.splice(index, 1);
}
if(self.original.length) {
if(index === self.current) {
self.current = (index < self.original.length) ? self.current : self.original.length - 1; // To cope when last element being selected when it was removed
self.select(self.current);
} else if(index < self.current) {
self.current--;
}
} else {
$(self.cssSelector.jPlayer).jPlayer("clearMedia");
self.current = 0;
self.shuffled = false;
self._updateControls();
}
self.removing = false;
});
}
return true;
}
}
},
select: function(index) {
index = (index < 0) ? this.original.length + index : index; // Negative index relates to end of array.
if(0 <= index && index < this.playlist.length) {
this.current = index;
this._highlight(index);
$(this.cssSelector.jPlayer).jPlayer("setMedia", this.playlist[this.current]);
} else {
this.current = 0;
}
},
play: function(index) {
index = (index < 0) ? this.original.length + index : index; // Negative index relates to end of array.
if(0 <= index && index < this.playlist.length) {
if(this.playlist.length) {
this.select(index);
$(this.cssSelector.jPlayer).jPlayer("play");
scrollJS(index);
}
} else if(index === undefined) {
$(this.cssSelector.jPlayer).jPlayer("play");
}
},
pause: function() {
$(this.cssSelector.jPlayer).jPlayer("pause");
},
next: function() {
var index = (this.current + 1 < this.playlist.length) ? this.current + 1 : 0;
if(this.loop) {
// See if we need to shuffle before looping to start, and only shuffle if more than 1 item.
if(index === 0 && this.shuffled && this.options.playlistOptions.shuffleOnLoop && this.playlist.length > 1) {
this.shuffle(true, true); // playNow
} else {
this.play(index);
scrollJS(index);
}
} else {
// The index will be zero if it just looped round
if(index > 0) {
this.play(index);
scrollJS(index);
}
}
},
previous: function() {
var index = (this.current - 1 >= 0) ? this.current - 1 : this.playlist.length - 1;
if(this.loop && this.options.playlistOptions.loopOnPrevious || index < this.playlist.length - 1) {
this.play(index);
scrollJS(index);
}
},
shuffle: function(shuffled, playNow) {
var self = this;
if(shuffled === undefined) {
shuffled = !this.shuffled;
}
if(shuffled || shuffled !== this.shuffled) {
$(this.cssSelector.playlist + " ul").slideUp(this.options.playlistOptions.shuffleTime, function() {
self.shuffled = shuffled;
if(shuffled) {
self.playlist.sort(function() {
return 0.5 - Math.random();
});
} else {
self._originalPlaylist();
}
self._refresh(true); // Instant
if(playNow || !$(self.cssSelector.jPlayer).data("jPlayer").status.paused) {
self.play(0);
scrollJS(0);
} else {
self.select(0);
scrollJS(0);
}
$(this).slideDown(self.options.playlistOptions.shuffleTime);
});
}
},
blur: function(that) {
if($(this.cssSelector.jPlayer).jPlayer("option", "autoBlur")) {
$(that).blur();
}
}
};
})(jQuery);