/*

 * jQuery UI Tabs

 *

 * 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

		};

	},

	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);

		});



		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)),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.element).triggerHandler('tabsshow',

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

				}; 



				// 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;

			});



		}



		// 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.element).triggerHandler('tabsshow',

					[self.ui(clicked, $show[0])], o.show);



			});

		}



		// 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.element).triggerHandler('tabsselect', [self.ui(this, $show[0])], o.select) === 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), 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 {

			$li.insertBefore(this.$lis[index]);

			$panel.insertBefore(this.$panels[index]);

		}

		

		o.disabled = $.map(o.disabled,

			function(n, i) { return n >= index ? ++n : n });

			

		this.tabify();



		if (this.$tabs.length == 1) {

			$li.addClass(o.selectedClass);

			$panel.removeClass(o.hideClass);

			var href = $.data(this.$tabs[0], 'load.tabs');

			if (href)

				this.load(index, href);

		}



		// callback

		this.element.triggerHandler('tabsadd',

			[this.ui(this.$tabs[index], this.$panels[index])], o.add

		);

	},

	remove: function(index) {

		var o = this.options, $li = this.$lis.eq(index).remove(),

			$panel = this.$panels.eq(index).remove();



		// If selected tab was removed focus tab to the right or

		// in case the last tab was removed the tab to the left.

		if ($li.hasClass(o.selectedClass) && this.$tabs.length > 1)

			this.select(index + (index + 1 < this.$tabs.length ? 1 : -1));



		o.disabled = $.map($.grep(o.disabled, function(n, i) { return n != index; }),

			function(n, i) { return n >= index ? --n : n });



		this.tabify();



		// callback

		this.element.triggerHandler('tabsremove',

			[this.ui($li.find('a')[0], $panel[0])], o.remove

		);

	},

	enable: function(index) {

		var o = this.options;

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

			return;

			

		var $li = this.$lis.eq(index).removeClass(o.disabledClass);

		if ($.browser.safari) { // fix disappearing tab (that used opacity indicating disabling) after enabling in Safari 2...

			$li.css('display', 'inline-block');

			setTimeout(function() {

				$li.css('display', 'block');

			}, 0);

		}



		o.disabled = $.grep(o.disabled, function(n, i) { return n != index; });



		// callback

		this.element.triggerHandler('tabsenable',

			[this.ui(this.$tabs[index], this.$panels[index])], o.enable

		);



	},

	disable: function(index) {

		var self = this, o = this.options;

		if (index != o.selected) { // cannot disable already selected tab

			this.$lis.eq(index).addClass(o.disabledClass);



			o.disabled.push(index);

			o.disabled.sort();



			// callback

			this.element.triggerHandler('tabsdisable',

				[this.ui(this.$tabs[index], this.$panels[index])], o.disable

			);

		}

	},

	select: function(index) {

		if (typeof index == 'string')

			index = this.$tabs.index( this.$tabs.filter('[href$=' + index + ']')[0] );

		this.$tabs.eq(index).trigger(this.options.event);

	},

	load: function(index, callback) { // callback is for internal usage only

		

		var self = this, o = this.options, $a = this.$tabs.eq(index), a = $a[0],

				bypassCache = callback == undefined || callback === false, url = $a.data('load.tabs');



		callback = callback || function() {};

		

		// no remote or from cache - just finish with callback

		if (!url || !bypassCache && $.data(a, 'cache.tabs')) {

			callback();

			return;

		}



		// load remote from here on

		

		var inner = function(parent) {

			var $parent = $(parent), $inner = $parent.find('*:last');

			return $inner.length && $inner || $parent;

		};

		var cleanup = function() {

			self.$tabs.filter('.' + o.loadingClass).removeClass(o.loadingClass)

						.each(function() {

							if (o.spinner)

								inner(this).parent().html(inner(this).data('label.tabs'));

						});

			self.xhr = null;

		};

		

		if (o.spinner) {

			var label = inner(a).html();

			inner(a).wrapInner('<em></em>')

				.find('em').data('label.tabs', label).html(o.spinner);

		}



		var ajaxOptions = $.extend({}, o.ajaxOptions, {

			url: url,

			success: function(r, s) {

				$(a.hash).html(r);

				cleanup();

				

				if (o.cache)

					$.data(a, 'cache.tabs', true); // if loaded once do not load them again



				// callbacks

				$(self.element).triggerHandler('tabsload',

					[self.ui(self.$tabs[index], self.$panels[index])], o.load

				);

				o.ajaxOptions.success && o.ajaxOptions.success(r, s);

				

				// This callback is required because the switch has to take

				// place after loading has completed. Call last in order to 

				// fire load before show callback...

				callback();

			}

		});

		if (this.xhr) {

			// terminate pending requests from other tabs and restore tab label

			this.xhr.abort();

			cleanup();

		}

		$a.addClass(o.loadingClass);

		setTimeout(function() { // timeout is again required in IE, "wait" for id being restored

			self.xhr = $.ajax(ajaxOptions);

		}, 0);



	},

	url: function(index, url) {

		this.$tabs.eq(index).removeData('cache.tabs').data('load.tabs', url);

	},

	destroy: function() {

		var o = this.options;

		this.element.unbind('.tabs')

			.removeClass(o.navClass).removeData('tabs');

		this.$tabs.each(function() {

			var href = $.data(this, 'href.tabs');

			if (href)

				this.href = href;

			var $this = $(this).unbind('.tabs');

			$.each(['href', 'load', 'cache'], function(i, prefix) {

				$this.removeData(prefix + '.tabs');

			});

		});

		this.$lis.add(this.$panels).each(function() {

			if ($.data(this, 'destroy.tabs'))

				$(this).remove();

			else

				$(this).removeClass([o.selectedClass, o.unselectClass,

					o.disabledClass, o.panelClass, o.hideClass].join(' '));

		});

	}

});



$.ui.tabs.defaults = {

	// basic setup

	unselect: false,

	event: 'click',

	disabled: [],

	cookie: null, // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }

	// TODO history: false,



	// Ajax

	spinner: 'Loading&#8230;',

	cache: false,

	idPrefix: 'ui-tabs-',

	ajaxOptions: {},



	// animations

	fx: null, // e.g. { height: 'toggle', opacity: 'toggle', duration: 200 }



	// templates

	tabTemplate: '<li><a href="#{href}"><span>#{label}</span></a></li>',

	panelTemplate: '<div></div>',



	// CSS classes

	navClass: 'ui-tabs-nav',

	selectedClass: 'ui-tabs-selected',

	unselectClass: 'ui-tabs-unselect',

	disabledClass: 'ui-tabs-disabled',

	panelClass: 'ui-tabs-panel',

	hideClass: 'ui-tabs-hide',

	loadingClass: 'ui-tabs-loading'

};



$.ui.tabs.getter = "length";



/*

 * Tabs Extensions

 */



/*

 * Rotate

 */

$.extend($.ui.tabs.prototype, {

	rotation: null,

	rotate: function(ms, continuing) {

		

		continuing = continuing || false;

		

		var self = this, t = this.options.selected;

		

		function start() {

			self.rotation = setInterval(function() {

				t = ++t < self.$tabs.length ? t : 0;

				self.select(t);

			}, ms); 

		}

		

		function stop(e) {

			if (!e || e.clientX) { // only in case of a true click

				clearInterval(self.rotation);

			}

		}

		

		// start interval

		if (ms) {

			start();

			if (!continuing)

				this.$tabs.bind(this.options.event, stop);

			else

				this.$tabs.bind(this.options.event, function() {

					stop();

					t = self.options.selected;

					start();

				});

		}

		// stop interval

		else {

			stop();

			this.$tabs.unbind(this.options.event, stop);

		}

	}

});



})(jQuery);