/*

 * jQuery UI Tabs @VERSION

 *

 * Copyright (c) 2007, 2008 Klaus Hartl (stilbuero.de)

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://docs.jquery.com/UI/Tabs

 *

 * Depends:

 *	ui.core.js

 */

(function($) {

$.widget("ui.tabs", {

	_init: function() {

		this.options.event += '.tabs'; // namespace event

		// create tabs

		this._tabify(true);

	},

	_setData: function(key, value) {

		if ((/^selected/).test(key))

			this.select(value);

		else {

			this.options[key] = value;

			this._tabify();

		}

	},

	length: function() {

		return this.$tabs.length;

	},

	_tabId: function(a) {

		return a.title && a.title.replace(/\s/g, '_').replace(/[^A-Za-z0-9\-_:\.]/g, '')

			|| this.options.idPrefix + $.data(a);

	},

	ui: function(tab, panel) {

		return {

			options: this.options,

			tab: tab,

			panel: panel,

			index: this.$tabs.index(tab)

		};

	},

	_tabify: function(init) {

		this.$lis = $('li:has(a[href])', this.element);

		this.$tabs = this.$lis.map(function() { return $('a', this)[0]; });

		this.$panels = $([]);

		var self = this, o = this.options;

		this.$tabs.each(function(i, a) {

			// inline tab

			if (a.hash && a.hash.replace('#', '')) // Safari 2 reports '#' for an empty hash

				self.$panels = self.$panels.add(a.hash);

			// remote tab

			else if ($(a).attr('href') != '#') { // prevent loading the page itself if href is just "#"

				$.data(a, 'href.tabs', a.href); // required for restore on destroy

				$.data(a, 'load.tabs', a.href); // mutable

				var id = self._tabId(a);

				a.href = '#' + id;

				var $panel = $('#' + id);

				if (!$panel.length) {

					$panel = $(o.panelTemplate).attr('id', id).addClass(o.panelClass)

						.insertAfter( self.$panels[i - 1] || self.element );

					$panel.data('destroy.tabs', true);

				}

				self.$panels = self.$panels.add( $panel );

			}

			// invalid tab href

			else

				o.disabled.push(i + 1);

		});

		// initialization from scratch

		if (init) {

			// attach necessary classes for styling if not present

			this.element.addClass(o.navClass);

			this.$panels.each(function() {

				var $this = $(this);

				$this.addClass(o.panelClass);

			});

			// Selected tab

			// use "selected" option or try to retrieve:

			// 1. from fragment identifier in url

			// 2. from cookie

			// 3. from selected class attribute on <li>

			if (o.selected === undefined) {

				if (location.hash) {

					this.$tabs.each(function(i, a) {

						if (a.hash == location.hash) {

							o.selected = i;

							// prevent page scroll to fragment

							if ($.browser.msie || $.browser.opera) { // && !o.remote

								var $toShow = $(location.hash), toShowId = $toShow.attr('id');

								$toShow.attr('id', '');

								setTimeout(function() {

									$toShow.attr('id', toShowId); // restore id

								}, 500);

							}

							scrollTo(0, 0);

							return false; // break

						}

					});

				}

				else if (o.cookie) {

					var index = parseInt($.cookie('ui-tabs-' + $.data(self.element[0])), 10);

					if (index && self.$tabs[index])

						o.selected = index;

				}

				else if (self.$lis.filter('.' + o.selectedClass).length)

					o.selected = self.$lis.index( self.$lis.filter('.' + o.selectedClass)[0] );

			}

			o.selected = o.selected === null || o.selected !== undefined ? o.selected : 0; // first tab selected by default

			// Take disabling tabs via class attribute from HTML

			// into account and update option properly.

			// A selected tab cannot become disabled.

			o.disabled = $.unique(o.disabled.concat(

				$.map(this.$lis.filter('.' + o.disabledClass),

					function(n, i) { return self.$lis.index(n); } )

			)).sort();

			if ($.inArray(o.selected, o.disabled) != -1)

				o.disabled.splice($.inArray(o.selected, o.disabled), 1);

			// highlight selected tab

			this.$panels.addClass(o.hideClass);

			this.$lis.removeClass(o.selectedClass);

			if (o.selected !== null) {

				this.$panels.eq(o.selected).show().removeClass(o.hideClass); // use show and remove class to show in any case no matter how it has been hidden before

				this.$lis.eq(o.selected).addClass(o.selectedClass);

				// seems to be expected behavior that the show callback is fired

				var onShow = function() {

					self._trigger('show', null,

						self.ui(self.$tabs[o.selected], self.$panels[o.selected]));

				};

				// load if remote tab

				if ($.data(this.$tabs[o.selected], 'load.tabs'))

					this.load(o.selected, onShow);

				// just trigger show event

				else

					onShow();

			}

			// clean up to avoid memory leaks in certain versions of IE 6

			$(window).bind('unload', function() {

				self.$tabs.unbind('.tabs');

				self.$lis = self.$tabs = self.$panels = null;

			});

		}

		// update selected after add/remove

		else

			o.selected = this.$lis.index( this.$lis.filter('.' + o.selectedClass)[0] );

		// set or update cookie after init and add/remove respectively

		if (o.cookie)

			$.cookie('ui-tabs-' + $.data(self.element[0]), o.selected, o.cookie);

		// disable tabs

		for (var i = 0, li; li = this.$lis[i]; i++)

			$(li)[$.inArray(i, o.disabled) != -1 && !$(li).hasClass(o.selectedClass) ? 'addClass' : 'removeClass'](o.disabledClass);

		// reset cache if switching from cached to not cached

		if (o.cache === false)

			this.$tabs.removeData('cache.tabs');

		// set up animations

		var hideFx, showFx, baseFx = { 'min-width': 0, duration: 1 }, baseDuration = 'normal';

		if (o.fx && o.fx.constructor == Array)

			hideFx = o.fx[0] || baseFx, showFx = o.fx[1] || baseFx;

		else

			hideFx = showFx = o.fx || baseFx;

		// reset some styles to maintain print style sheets etc.

		var resetCSS = { display: '', overflow: '', height: '' };

		if (!$.browser.msie) // not in IE to prevent ClearType font issue

			resetCSS.opacity = '';

		// Hide a tab, animation prevents browser scrolling to fragment,

		// $show is optional.

		function hideTab(clicked, $hide, $show) {

			$hide.animate(hideFx, hideFx.duration || baseDuration, function() { //

				$hide.addClass(o.hideClass).css(resetCSS); // maintain flexible height and accessibility in print etc.

				if ($.browser.msie && hideFx.opacity)

					$hide[0].style.filter = '';

				if ($show)

					showTab(clicked, $show, $hide);

			});

		}

		// Show a tab, animation prevents browser scrolling to fragment,

		// $hide is optional.

		function showTab(clicked, $show, $hide) {

			if (showFx === baseFx)

				$show.css('display', 'block'); // prevent occasionally occuring flicker in Firefox cause by gap between showing and hiding the tab panels

			$show.animate(showFx, showFx.duration || baseDuration, function() {

				$show.removeClass(o.hideClass).css(resetCSS); // maintain flexible height and accessibility in print etc.

				if ($.browser.msie && showFx.opacity)

					$show[0].style.filter = '';

				// callback

				self._trigger('show', null, self.ui(clicked, $show[0]));

			});

		}

		// switch a tab

		function switchTab(clicked, $li, $hide, $show) {

			/*if (o.bookmarkable && trueClick) { // add to history only if true click occured, not a triggered click

				$.ajaxHistory.update(clicked.hash);

			}*/

			$li.addClass(o.selectedClass)

				.siblings().removeClass(o.selectedClass);

			hideTab(clicked, $hide, $show);

		}

		// attach tab event handler, unbind to avoid duplicates from former tabifying...

		this.$tabs.unbind('.tabs').bind(o.event, function() {

			//var trueClick = e.clientX; // add to history only if true click occured, not a triggered click

			var $li = $(this).parents('li:eq(0)'),

				$hide = self.$panels.filter(':visible'),

				$show = $(this.hash);

			// If tab is already selected and not unselectable or tab disabled or 

			// or is already loading or click callback returns false stop here.

			// Check if click handler returns false last so that it is not executed

			// for a disabled or loading tab!

			if (($li.hasClass(o.selectedClass) && !o.unselect)

				|| $li.hasClass(o.disabledClass) 

				|| $(this).hasClass(o.loadingClass)

				|| self._trigger('select', null, self.ui(this, $show[0])) === false

				) {

				this.blur();

				return false;

			}

			self.options.selected = self.$tabs.index(this);

			// if tab may be closed

			if (o.unselect) {

				if ($li.hasClass(o.selectedClass)) {

					self.options.selected = null;

					$li.removeClass(o.selectedClass);

					self.$panels.stop();

					hideTab(this, $hide);

					this.blur();

					return false;

				} else if (!$hide.length) {

					self.$panels.stop();

					var a = this;

					self.load(self.$tabs.index(this), function() {

						$li.addClass(o.selectedClass).addClass(o.unselectClass);

						showTab(a, $show);

					});

					this.blur();

					return false;

				}

			}

			if (o.cookie)

				$.cookie('ui-tabs-' + $.data(self.element[0]), self.options.selected, o.cookie);

			// stop possibly running animations

			self.$panels.stop();

			// show new tab

			if ($show.length) {

				// prevent scrollbar scrolling to 0 and than back in IE7, happens only if bookmarking/history is enabled

				/*if ($.browser.msie && o.bookmarkable) {

					var showId = this.hash.replace('#', '');

					$show.attr('id', '');

					setTimeout(function() {

						$show.attr('id', showId); // restore id

					}, 0);

				}*/

				var a = this;

				self.load(self.$tabs.index(this), $hide.length ? 

					function() {

						switchTab(a, $li, $hide, $show);

					} :

					function() {

						$li.addClass(o.selectedClass);

						showTab(a, $show);

					}

				);

				// Set scrollbar to saved position - need to use timeout with 0 to prevent browser scroll to target of hash

				/*var scrollX = window.pageXOffset || document.documentElement && document.documentElement.scrollLeft || document.body.scrollLeft || 0;

				var scrollY = window.pageYOffset || document.documentElement && document.documentElement.scrollTop || document.body.scrollTop || 0;

				setTimeout(function() {

					scrollTo(scrollX, scrollY);

				}, 0);*/

			} else

				throw 'jQuery UI Tabs: Mismatching fragment identifier.';

			// Prevent IE from keeping other link focussed when using the back button

			// and remove dotted border from clicked link. This is controlled in modern

			// browsers via CSS, also blur removes focus from address bar in Firefox

			// which can become a usability and annoying problem with tabsRotate.

			if ($.browser.msie)

				this.blur();

			//return o.bookmarkable && !!trueClick; // convert trueClick == undefined to Boolean required in IE

			return false;

		});

		// disable click if event is configured to something else

		if (!(/^click/).test(o.event))

			this.$tabs.bind('click.tabs', function() { return false; });

	},

	add: function(url, label, index) {

		if (index == undefined) 

			index = this.$tabs.length; // append by default

		var o = this.options;

		var $li = $(o.tabTemplate.replace(/#\{href\}/g, url).replace(/#\{label\}/g, label));

		$li.data('destroy.tabs', true);

		var id = url.indexOf('#') == 0 ? url.replace('#', '') : this._tabId( $('a:first-child', $li)[0] );

		// try to find an existing element before creating a new one

		var $panel = $('#' + id);

		if (!$panel.length) {

			$panel = $(o.panelTemplate).attr('id', id)

				.addClass(o.hideClass)

				.data('destroy.tabs', true);

		}

		$panel.addClass(o.panelClass);

		if (index >= this.$lis.length) {

			$li.appendTo(this.element);

			$panel.appendTo(this.element[0].parentNode);

		} else {