jquery-ui/ui/jquery.ui.tabs.js

/*!
 * jQuery UI Tabs @VERSION
 *
 * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Tabs
 *
 * Depends:
 *	jquery.ui.core.js
 *	jquery.ui.widget.js
 */
(function( $, undefined ) {

var tabId = 0,
	rhash = /#.*$/;

function getNextTabId() {
	return ++tabId;
}

function isLocal( anchor ) {
	// clone the node to work around IE 6 not normalizing the href property
	// if it's manually set, i.e., a.href = "#foo" kills the normalization
	anchor = anchor.cloneNode( false );
	return anchor.hash.length > 1 &&
		anchor.href.replace( rhash, "" ) === location.href.replace( rhash, "" );
}

$.widget( "ui.tabs", {
	version: "@VERSION",
	options: {
		active: null,
		collapsible: false,
		event: "click",
		hide: null,
		show: null,

		// callbacks
		activate: null,
		beforeActivate: null,
		beforeLoad: null,
		load: null
	},

	_create: function() {
		var panel,
			that = this,
			options = this.options,
			active = options.active;

		this.running = false;

		this.element.addClass( "ui-tabs ui-widget ui-widget-content ui-corner-all" );

		this._processTabs();

		if ( active === null ) {
			// check the fragment identifier in the URL
			if ( location.hash ) {
				this.anchors.each(function( i, anchor ) {
					if ( anchor.hash === location.hash ) {
						active = i;
						return false;
					}
				});
			}

			// check for a tab marked active via a class
			if ( active === null ) {
				active = this.lis.filter( ".ui-tabs-active" ).index();
			}

			// no active tab, set to false
			if ( active === null || active === -1 ) {
				active = this.lis.length ? 0 : false;
			}
		}

		// handle numbers: negative, out of range
		if ( active !== false ) {
			active = this.lis.eq( active ).index();
			if ( active === -1 ) {
				active = options.collapsible ? false : 0;
			}
		}
		options.active = active;

		// don't allow collapsible: false and active: false
		if ( !options.collapsible && options.active === false && this.anchors.length ) {
			options.active = 0;
		}

		// Take disabling tabs via class attribute from HTML
		// into account and update option properly.
		if ( $.isArray( options.disabled ) ) {
			options.disabled = $.unique( options.disabled.concat(
				$.map( this.lis.filter( ".ui-state-disabled" ), function( li ) {
					return that.lis.index( li );
				})
			) ).sort();
		}

		this._refresh();

		// highlight selected tab
		this.panels.hide();
		this.lis.removeClass( "ui-tabs-active ui-state-active" );
		// check for length avoids error when initializing empty list
		if ( options.active !== false && this.anchors.length ) {
			this.active = this._findActive( options.active );
			panel = this._getPanelForTab( this.active );

			panel.show();
			this.lis.eq( options.active ).addClass( "ui-tabs-active ui-state-active" );
			this.load( options.active );
		} else {
			this.active = $();
		}
	},

	_getCreateEventData: function() {
		return {
			tab: this.active,
			panel: !this.active.length ? $() : this._getPanelForTab( this.active )
		};
	},

	_setOption: function( key, value ) {
		if ( key === "active" ) {
			// _activate() will handle invalid values and update this.options
			this._activate( value );
			return;
		}

		if ( key === "disabled" ) {
			// don't use the widget factory's disabled handling
			this._setupDisabled( value );
			return;
		}

		this._super( key, value);

		// setting collapsible: false while collapsed; open first panel
		if ( key === "collapsible" && !value && this.options.active === false ) {
			this._activate( 0 );
		}

		if ( key === "event" ) {
			this._setupEvents( value );
		}
	},

	_tabId: function( tab ) {
		return tab.attr( "aria-controls" ) || "ui-tabs-" + getNextTabId();
	},

	_sanitizeSelector: function( hash ) {
		return hash ? hash.replace( /[!"$%&'()*+,.\/:;<=>?@\[\]\^`{|}~]/g, "\\$&" ) : "";
	},

	refresh: function() {
		var next,
			options = this.options,
			lis = this.list.children( ":has(a[href])" );

		// get disabled tabs from class attribute from HTML
		// this will get converted to a boolean if needed in _refresh()
		options.disabled = $.map( lis.filter( ".ui-state-disabled" ), function( tab ) {
			return lis.index( tab );
		});

		this._processTabs();
		this._refresh();
		this.panels.not( this._getPanelForTab( this.active ) ).hide();

		// was collapsed or no tabs
		if ( options.active === false || !this.anchors.length ) {
			options.active = false;
			this.active = $();
		// was active, but active tab is gone
		} else if ( this.active.length && !$.contains( this.list[ 0 ], this.active[ 0 ] ) ) {
			// activate previous tab
			next = options.active - 1;
			this._activate( next >= 0 ? next : 0 );
		// was active, active tab still exists
		} else {
			// make sure active index is correct
			options.active = this.lis.index( this.active );
		}
	},

	_refresh: function() {
		var options = this.options;

		this.element.toggleClass( "ui-tabs-collapsible", options.collapsible );
		this.list.addClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" );
		this.lis.addClass( "ui-state-default ui-corner-top" );
		this.anchors.addClass( "ui-tabs-anchor" );
		this.panels.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" );

		this._setupDisabled( options.disabled );
		this._setupEvents( options.event );

		// remove all handlers, may run on existing tabs
		this.lis.unbind( ".tabs" );
		this._focusable( this.lis );
		this._hoverable( this.lis );
	},

	_processTabs: function() {
		var that = this;

		this.list = this._getList();
		this.lis = this.list.find( "> li:has(a[href])" );
		this.anchors = this.lis.map(function() {
			return $( "a", this )[ 0 ];
		});
		this.panels = $();

		this.anchors.each(function( i, a ) {
			var selector, panel, id,
				tab = $( a ).closest( "li" );

			// inline tab
			if ( isLocal( a ) ) {
				selector = a.hash;
				panel = that.element.find( that._sanitizeSelector( selector ) );
			// remote tab
			} else {
				id = that._tabId( tab );
				selector = "#" + id;
				panel = that.element.find( selector );
				if ( !panel.length ) {
					panel = that._createPanel( id );
					panel.insertAfter( that.panels[ i - 1 ] || that.list );
				}
			}

			if ( panel.length) {
				that.panels = that.panels.add( panel );
			}
			tab.attr( "aria-controls", selector.substring( 1 ) );
		});
	},

	// allow overriding how to find the list for rare usage scenarios (#7715)
	_getList: function() {
		return this.element.find( "ol,ul" ).eq( 0 );
	},

	_createPanel: function( id ) {
		return $( "<div>" )
			.attr( "id", id )
			.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
			.data( "ui-tabs-destroy", true );
	},

	_setupDisabled: function( disabled ) {
		if ( $.isArray( disabled ) ) {
			if ( !disabled.length ) {
				disabled = false;
			} else if ( disabled.length === this.anchors.length ) {
				disabled = true;
			}
		}

		// disable tabs
		for ( var i = 0, li; ( li = this.lis[ i ] ); i++ ) {
			$( li ).toggleClass( "ui-state-disabled",
				( disabled === true || $.inArray( i, disabled ) !== -1 ) );
		}

		this.options.disabled = disabled;
	},

	_setupEvents: function( event ) {
		var events = {
			click: function( event ) {
				event.preventDefault();
			}
		};
		if ( event ) {
			$.each( event.split(" "), function( index, eventName ) {
				events[ eventName ] = "_eventHandler";
			});
		}
		this.anchors.unbind( ".tabs" );
		this._bind( this.anchors, events );
	},

	_eventHandler: function( event ) {
		var options = this.options,
			active = this.active,
			anchor = $( event.currentTarget ),
			tab = anchor.closest( "li" ),
			clickedIsActive = tab[ 0 ] === active[ 0 ],
			collapsing = clickedIsActive && options.collapsible,
			toShow = collapsing ? $() : this._getPanelForTab( tab ),
			toHide = !active.length ? $() : this._getPanelForTab( active ),
			eventData = {
				oldTab: active,
				oldPanel: toHide,
				newTab: collapsing ? $() : tab,
				newPanel: toShow
			};

		event.preventDefault();

		if ( tab.hasClass( "ui-state-disabled" ) ||
				// tab is already loading
				tab.hasClass( "ui-tabs-loading" ) ||
				// can't switch durning an animation
				this.running ||
				// click on active header, but not collapsible
				( clickedIsActive && !options.collapsible ) ||
				// allow canceling activation
				( this._trigger( "beforeActivate", event, eventData ) === false ) ) {
			return;
		}

		options.active = collapsing ? false : this.lis.index( tab );

		this.active = clickedIsActive ? $() : tab;
		if ( this.xhr ) {
			this.xhr.abort();
		}

		if ( !toHide.length && !toShow.length ) {
			$.error( "jQuery UI Tabs: Mismatching fragment identifier." );
		}

		if ( toShow.length ) {
			// TODO make passing in node possible
			this.load( this.lis.index( tab ), event );
		}
		this._toggle( event, eventData );
	},

	// handles show/hide for selecting tabs
	_toggle: function( event, eventData ) {
		var that = this,
			toShow = eventData.newPanel,
			toHide = eventData.oldPanel;

		this.running = true;

		function complete() {
			that.running = false;
			that._trigger( "activate", event, eventData );
		}

		function show() {
			eventData.newTab.closest( "li" ).addClass( "ui-tabs-active ui-state-active" );

			if ( toShow.length && that.options.show ) {
				that._show( toShow, that.options.show, complete );
			} else {
				toShow.show();
				complete();
			}
		}

		// start out by hiding, then showing, then completing
		if ( toHide.length && this.options.hide ) {
			this._hide( toHide, this.options.hide, function() {
				eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
				show();
			});
		} else {
			eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
			toHide.hide();
			show();
		}
	},

	_activate: function( index ) {
		var anchor,
			active = this._findActive( index );

		// trying to activate the already active panel
		if ( active[ 0 ] === this.active[ 0 ] ) {
			return;
		}

		// trying to collapse, simulate a click on the current active header
		if ( !active.length ) {
			active = this.active;
		}

		anchor = active.find( ".ui-tabs-anchor" )[ 0 ];
		this._eventHandler({
			target: anchor,
			currentTarget: anchor,
			preventDefault: $.noop
		});
	},

	_findActive: function( selector ) {
		if ( typeof selector === "number" ) {
			return this.lis.eq( selector );
		}
		if ( typeof selector === "string" ) {
			return this.anchors.filter( "[href$='" + selector + "']" ).closest( "li" );
		}
		return $();
	},

	_getIndex: function( index ) {
		// meta-function to give users option to provide a href string instead of a numerical index.
		if ( typeof index === "string" ) {
			index = this.anchors.index( this.anchors.filter( "[href$='" + index + "']" ) );
		}

		return index;
	},

	_destroy: function() {
		if ( this.xhr ) {
			this.xhr.abort();
		}

		this.element.removeClass( "ui-tabs ui-widget ui-widget-content ui-corner-all ui-tabs-collapsible" );

		this.list.removeClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" );

		this.anchors
			.removeClass( "ui-tabs-anchor" )
			.unbind( ".tabs" )
			.removeData( "href.tabs" )
			.removeData( "load.tabs" );

		this.lis.unbind( ".tabs" ).add( this.panels ).each(function() {
			if ( $.data( this, "ui-tabs-destroy" ) ) {
				$( this ).remove();
			} else {
				$( this ).removeClass([
					"ui-state-default",
					"ui-corner-top",
					"ui-tabs-active",
					"ui-state-active",
					"ui-state-disabled",
					"ui-tabs-panel",
					"ui-widget-content",
					"ui-corner-bottom"
				].join( " " ) );
			}
		});

		return this;
	},

	enable: function( index ) {
		var disabled = this.options.disabled;
		if ( disabled === false ) {
			return;
		}

		if ( index === undefined ) {
			disabled = false;
		} else {
			index = this._getIndex( index );
			if ( $.isArray( disabled ) ) {
				disabled = $.map( disabled, function( num ) {
					return num !== index ? num : null;
				});
			} else {
				disabled = $.map( this.lis, function( li, num ) {
					return num !== index ? num : null;
				});
			}
		}
		this._setupDisabled( disabled );
	},

	disable: function( index ) {
		var disabled = this.options.disabled;
		if ( disabled === true ) {
			return;
		}

		if ( index === undefined ) {
			disabled = true;
		} else {
			index = this._getIndex( index );
			if ( $.inArray( index, disabled ) !== -1 ) {
				return;
			}
			if ( $.isArray( disabled ) ) {
				disabled = $.merge( [ index ], disabled ).sort();
			} else {
				disabled = [ index ];
			}
		}
		this._setupDisabled( disabled );
	},

	load: function( index, event ) {
		index = this._getIndex( index );
		var that = this,
			tab = this.lis.eq( index ),
			anchor = tab.find( ".ui-tabs-anchor" ),
			panel = this._getPanelForTab( tab ),
			eventData = {
				tab: tab,
				panel: panel
			};

		// not remote
		if ( isLocal( anchor[ 0 ] ) ) {
			return;
		}

		this.xhr = $.ajax({
			url: anchor.attr( "href" ),
			beforeSend: function( jqXHR, settings ) {
				return that._trigger( "beforeLoad", event,
					$.extend( { jqXHR : jqXHR, ajaxSettings: settings }, eventData ) );
			}
		});

		// support: jQuery <1.8
		// jQuery <1.8 returns false if the request is canceled in beforeSend,
		// but as of 1.8, $.ajax() always returns a jqXHR object.
		if ( this.xhr && this.xhr.statusText !== "canceled" ) {
			tab.addClass( "ui-tabs-loading" );

			this.xhr
				.success(function( response ) {
					// support: jQuery <1.8
					// http://bugs.jquery.com/ticket/11778
					setTimeout(function() {
						panel.html( response );
						that._trigger( "load", event, eventData );
					}, 1 );
				})
				.complete(function( jqXHR, status ) {
					// support: jQuery <1.8
					// http://bugs.jquery.com/ticket/11778
					setTimeout(function() {
						if ( status === "abort" ) {
							that.panels.stop( false, true );
						}

						tab.removeClass( "ui-tabs-loading" );

						if ( jqXHR === that.xhr ) {
							delete that.xhr;
						}
					}, 1 );
				});
		}
	},

	_getPanelForTab: function( tab ) {
		var id = $( tab ).attr( "aria-controls" );
		return this.element.find( this._sanitizeSelector( "#" + id ) );
	}
});

// DEPRECATED
if ( $.uiBackCompat !== false ) {

	// helper method for a lot of the back compat extensions
	$.ui.tabs.prototype._ui = function( tab, panel ) {
		return {
			tab: tab,
			panel: panel,
			index: this.anchors.index( tab )
		};
	};

	// url method
	$.widget( "ui.tabs", $.ui.tabs, {
		url: function( index, url ) {
			this.anchors.eq( index ).attr( "href", url );
		}
	});

	// ajaxOptions and cache options
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			ajaxOptions: null,
			cache: false
		},

		_create: function() {
			this._super();

			var that = this;

			this.element.bind( "tabsbeforeload.tabs", function( event, ui ) {
				// tab is already cached
				if ( $.data( ui.tab[ 0 ], "cache.tabs" ) ) {
					event.preventDefault();
					return;
				}

				$.extend( ui.ajaxSettings, that.options.ajaxOptions, {
					error: function( xhr, s, e ) {
						try {
							// Passing index avoid a race condition when this method is
							// called after the user has selected another tab.
							// Pass the anchor that initiated this request allows
							// loadError to manipulate the tab content panel via $(a.hash)
							that.options.ajaxOptions.error( xhr, s, ui.tab.closest( "li" ).index(), ui.tab[ 0 ] );
						}
						catch ( e ) {}
					}
				});

				ui.jqXHR.success(function() {
					if ( that.options.cache ) {
						$.data( ui.tab[ 0 ], "cache.tabs", true );
					}
				});
			});
		},

		_setOption: function( key, value ) {
			// reset cache if switching from cached to not cached
			if ( key === "cache" && value === false ) {
				this.anchors.removeData( "cache.tabs" );
			}
			this._super( key, value );
		},

		_destroy: function() {
			this.anchors.removeData( "cache.tabs" );
			this._super();
		},

		url: function( index, url ){
			this.anchors.eq( index ).removeData( "cache.tabs" );
			this._superApply( arguments );
		}
	});

	// abort method
	$.widget( "ui.tabs", $.ui.tabs, {
		abort: function() {
			if ( this.xhr ) {
				this.xhr.abort();
			}
		}
	});

	// spinner
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			spinner: "<em>Loading&#8230;</em>"
		},
		_create: function() {
			this._super();
			this._bind({
				tabsbeforeload: function( event, ui ) {
					if ( !this.options.spinner ) {
						return;
					}

					var span = ui.tab.find( "span" ),
						html = span.html();
					span.html( this.options.spinner );
					ui.jqXHR.complete(function() {
						span.html( html );
					});
				}
			});
		}
	});

	// enable/disable events
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			enable: null,
			disable: null
		},

		enable: function( index ) {
			var options = this.options,
				trigger;

			if ( index && options.disabled === true ||
					( $.isArray( options.disabled ) && $.inArray( index, options.disabled ) !== -1 ) ) {
				trigger = true;
			}

			this._superApply( arguments );

			if ( trigger ) {
				this._trigger( "enable", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
			}
		},

		disable: function( index ) {
			var options = this.options,
				trigger;

			if ( index && options.disabled === false ||
					( $.isArray( options.disabled ) && $.inArray( index, options.disabled ) === -1 ) ) {
				trigger = true;
			}

			this._superApply( arguments );

			if ( trigger ) {
				this._trigger( "disable", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
			}
		}
	});

	// add/remove methods and events
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			add: null,
			remove: null,
			tabTemplate: "<li><a href='#{href}'><span>#{label}</span></a></li>"
		},

		add: function( url, label, index ) {
			if ( index === undefined ) {
				index = this.anchors.length;
			}

			var doInsertAfter, panel,
				options = this.options,
				li = $( options.tabTemplate
					.replace( /#\{href\}/g, url )
					.replace( /#\{label\}/g, label ) ),
				id = !url.indexOf( "#" ) ?
					url.replace( "#", "" ) :
					this._tabId( li );

			li.addClass( "ui-state-default ui-corner-top" ).data( "ui-tabs-destroy", true );
			li.attr( "aria-controls", id );

			doInsertAfter = index >= this.lis.length;

			// try to find an existing element before creating a new one
			panel = this.element.find( "#" + id );
			if ( !panel.length ) {
				panel = this._createPanel( id );
				if ( doInsertAfter ) {
					if ( index > 0 ) {
						panel.insertAfter( this.panels.eq( -1 ) );
					} else {
						panel.appendTo( this.element );
					}
				} else {
					panel.insertBefore( this.panels[ index ] );
				}
			}
			panel.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" ).hide();

			if ( doInsertAfter ) {
				li.appendTo( this.list );
			} else {
				li.insertBefore( this.lis[ index ] );
			}

			options.disabled = $.map( options.disabled, function( n ) {
				return n >= index ? ++n : n;
			});

			this.refresh();
			if ( this.lis.length === 1 && options.active === false ) {
				this.option( "active", 0 );
			}

			this._trigger( "add", null, this._ui( this.anchors[ index ], this.panels[ index ] ) );
			return this;
		},

		remove: function( index ) {
			index = this._getIndex( index );
			var options = this.options,
				tab = this.lis.eq( index ).remove(),
				panel = this._getPanelForTab( tab ).remove();

			// If selected tab was removed focus tab to the right or
			// in case the last tab was removed the tab to the left.
			// We check for more than 2 tabs, because if there are only 2,
			// then when we remove this tab, there will only be one tab left
			// so we don't need to detect which tab to activate.
			if ( tab.hasClass( "ui-tabs-active" ) && this.anchors.length > 2 ) {
				this._activate( index + ( index + 1 < this.anchors.length ? 1 : -1 ) );
			}

			options.disabled = $.map(
				$.grep( options.disabled, function( n ) {
					return n !== index;
				}),
				function( n ) {
					return n >= index ? --n : n;
				});

			this.refresh();

			this._trigger( "remove", null, this._ui( tab.find( "a" )[ 0 ], panel[ 0 ] ) );
			return this;
		}
	});

	// length method
	$.widget( "ui.tabs", $.ui.tabs, {
		length: function() {
			return this.anchors.length;
		}
	});

	// panel ids (idPrefix option + title attribute)
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			idPrefix: "ui-tabs-"
		},

		_tabId: function( tab ) {
			var a = tab.is( "li" ) ? tab.find( "a[href]" ) : tab;
			a = a[0];
			return $( a ).closest( "li" ).attr( "aria-controls" ) ||
				a.title && a.title.replace( /\s/g, "_" ).replace( /[^\w\u00c0-\uFFFF\-]/g, "" ) ||
				this.options.idPrefix + getNextTabId();
		}
	});

	// _createPanel method
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			panelTemplate: "<div></div>"
		},

		_createPanel: function( id ) {
			return $( this.options.panelTemplate )
				.attr( "id", id )
				.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
				.data( "ui-tabs-destroy", true );
		}
	});

	// selected option
	$.widget( "ui.tabs", $.ui.tabs, {
		_create: function() {
			var options = this.options;
			if ( options.active === null && options.selected !== undefined ) {
				options.active = options.selected === -1 ? false : options.selected;
			}
			this._super();
			options.selected = options.active;
			if ( options.selected === false ) {
				options.selected = -1;
			}
		},

		_setOption: function( key, value ) {
			if ( key !== "selected" ) {
				return this._super( key, value );
			}

			var options = this.options;
			this._super( "active", value === -1 ? false : value );
			options.selected = options.active;
			if ( options.selected === false ) {
				options.selected = -1;
			}
		},

		_eventHandler: function( event ) {
			this._superApply( arguments );
			this.options.selected = this.options.active;
			if ( this.options.selected === false ) {
				this.options.selected = -1;
			}
		}
	});

	// show and select event
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			show: null,
			select: null
		},
		_create: function() {
			this._super();
			if ( this.options.active !== false ) {
				this._trigger( "show", null, this._ui(
					this.active.find( ".ui-tabs-anchor" )[ 0 ],
					this._getPanelForTab( this.active )[ 0 ] ) );
			}
		},
		_trigger: function( type, event, data ) {
			var ret = this._superApply( arguments );
			if ( !ret ) {
				return false;
			}
			if ( type === "beforeActivate" && data.newTab.length ) {
				ret = this._super( "select", event, {
					tab: data.newTab.find( ".ui-tabs-anchor" )[ 0],
					panel: data.newPanel[ 0 ],
					index: data.newTab.closest( "li" ).index()
				});
			} else if ( type === "activate" && data.newTab.length ) {
				ret = this._super( "show", event, {
					tab: data.newTab.find( ".ui-tabs-anchor" )[ 0 ],
					panel: data.newPanel[ 0 ],
					index: data.newTab.closest( "li" ).index()
				});
			}
			return ret;
		}
	});

	// select method
	$.widget( "ui.tabs", $.ui.tabs, {
		select: function( index ) {
			index = this._getIndex( index );
			if ( index === -1 ) {
				if ( this.options.collapsible && this.options.selected !== -1 ) {
					index = this.options.selected;
				} else {
					return;
				}
			}
			this.anchors.eq( index ).trigger( this.options.event + ".tabs" );
		}
	});

	// cookie option
	(function() {

	var listId = 0;

	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			cookie: null // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
		},
		_create: function() {
			var options = this.options,
				active;
			if ( options.active == null && options.cookie ) {
				active = parseInt( this._cookie(), 10 );
				if ( active === -1 ) {
					active = false;
				}
				options.active = active;
			}
			this._super();
		},
		_cookie: function( active ) {
			var cookie = [ this.cookie ||
				( this.cookie = this.options.cookie.name || "ui-tabs-" + (++listId) ) ];
			if ( arguments.length ) {
				cookie.push( active === false ? -1 : active );
				cookie.push( this.options.cookie );
			}
			return $.cookie.apply( null, cookie );
		},
		_refresh: function() {
			this._super();
			if ( this.options.cookie ) {
				this._cookie( this.options.active, this.options.cookie );
			}
		},
		_eventHandler: function( event ) {
			this._superApply( arguments );
			if ( this.options.cookie ) {
				this._cookie( this.options.active, this.options.cookie );
			}
		},
		_destroy: function() {
			this._super();
			if ( this.options.cookie ) {
				this._cookie( null, this.options.cookie );
			}
		}
	});

	})();

	// load event
	$.widget( "ui.tabs", $.ui.tabs, {
		_trigger: function( type, event, data ) {
			var _data = $.extend( {}, data );
			if ( type === "load" ) {
				_data.panel = _data.panel[ 0 ];
				_data.tab = _data.tab.find( ".ui-tabs-anchor" )[ 0 ];
			}
			return this._super( type, event, _data );
		}
	});

	// fx option
	// The new animation options (show, hide) conflict with the old show callback.
	// The old fx option wins over show/hide anyway (always favor back-compat).
	// If a user wants to use the new animation API, they must give up the old API.
	$.widget( "ui.tabs", $.ui.tabs, {
		options: {
			fx: null // e.g. { height: "toggle", opacity: "toggle", duration: 200 }
		},

		_getFx: function() {
			var hide, show,
				fx = this.options.fx;

			if ( fx ) {
				if ( $.isArray( fx ) ) {
					hide = fx[ 0 ];
					show = fx[ 1 ];
				} else {
					hide = show = fx;
				}
			}

			return fx ? { show: show, hide: hide } : null;
		},

		_toggle: function( event, eventData ) {
			var that = this,
				toShow = eventData.newPanel,
				toHide = eventData.oldPanel,
				fx = this._getFx();

			if ( !fx ) {
				return this._super( event, eventData );
			}

			that.running = true;

			function complete() {
				that.running = false;
				that._trigger( "activate", event, eventData );
			}

			function show() {
				eventData.newTab.closest( "li" ).addClass( "ui-tabs-active ui-state-active" );

				if ( toShow.length && fx.show ) {
					toShow
						.animate( fx.show, fx.show.duration, function() {
							complete();
						});
				} else {
					toShow.show();
					complete();
				}
			}

			// start out by hiding, then showing, then completing
			if ( toHide.length && fx.hide ) {
				toHide.animate( fx.hide, fx.hide.duration, function() {
					eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
					show();
				});
			} else {
				eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
				toHide.hide();
				show();
			}
		}
	});
}

})( jQuery );