/*
 * 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($) {

   $.widget("ui.tabs", {
      _init: function() {
         // create tabs
         this._tabify(true);
      },
      _setData: function(key, value) {
         if ((/^selected/).test(key))
            this.select(value);
         else {
            this.options[key] = value;
            this._tabify();
         }
      },
      length: function() {
         return this.$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)
         };
      },
      _sanitizeSelector: function(hash) {
         return hash.replace(/:/g, '\\:'); // we need this because an id may contain a ":"
      },
      _cookie: function() {
         var cookie = this.cookie || (this.cookie = 'ui-tabs-' + $.data(this.element[0]));
         return $.cookie.apply(null, [cookie].concat($.makeArray(arguments)));
      },
      _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.$panels.add(self._sanitizeSelector(a.hash));
            // remote tab
            else if ($(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.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.$tabs.each(function(i, a) {
                     if (a.hash == location.hash) {
                        o.selected = i;
                        return false; // break
                     }
                  });
               }
               else if (o.cookie) {
                  var index = parseInt(self._cookie(), 10);
                  if (index && self.$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.$panels.eq(o.selected).removeClass(o.hideClass);
               var classes = [o.selectedClass];
               if (o.deselectable) classes.push(o.deselectableClass);
               this.$lis.eq(o.selected).addClass(classes.join(' '));
				
               // 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) this._cookie(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;
         if (o.fx) {
            if (o.fx.constructor == Array) {
               hideFx = o.fx[0];
               showFx = o.fx[1];
            }
            else hideFx = showFx = o.fx;
         }
		
         // Reset certain styles left over from animation
         // and prevent IE's ClearType bug...
         function resetStyle($el, fx) {
            $el.css({
               display: ''
            });
            if ($.browser.msie && fx.opacity) $el[0].style.removeAttribute('filter');
         }

         // Show a tab...
         var showTab = showFx ?
         function(clicked, $show) {
            $show.animate(showFx, showFx.duration || 'normal', function() {
               $show.removeClass(o.hideClass);
               resetStyle($show, showFx);
               self._trigger('show', null, self.ui(clicked, $show[0]));
            });
         } :
         function(clicked, $show) {
            $show.removeClass(o.hideClass);
            self._trigger('show', null, self.ui(clicked, $show[0]));
         };
		
         // Hide a tab, $show is optional...
         var hideTab = hideFx ?
         function(clicked, $hide, $show) {
            $hide.animate(hideFx, hideFx.duration || 'normal', function() {
               $hide.addClass(o.hideClass);
               resetStyle($hide, hideFx);
               if ($show) showTab(clicked, $show, $hide);
            });
         } :
         function(clicked, $hide, $show) {
            $hide.addClass(o.hideClass);
            if ($show) showTab(clicked, $show);
         };
		
         // Switch a tab...
         function switchTab(clicked, $li, $hide, $show) {
            var classes = [o.selectedClass];
            if (o.deselectable) classes.push(o.deselectableClass);
            $li.addClass(classes.join(' ')).siblings().removeClass(classes.join(' '));
            hideTab(clicked, $hide, $show);
         }
		
         // attach tab event handler, unbind to avoid duplicates from former tabifying...
         this.$tabs.unbind('.tabs').bind(o.event + '.tabs', 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 = $(self._sanitizeSelector(this.hash));
			
            // If tab is already selected and not deselectable 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.deselectable)
               || $li.hasClass(o.disabledClass)
               || $(this).hasClass(o.loadingClass)
               || self._trigger('select', null, self.ui(this, $show[0])) === false
               ) {
               this.blur();
               return false;
            }
			
            o.selected = self.$tabs.index(this);
			
            // if tab may be closed
            if (o.deselectable) {
               if ($li.hasClass(o.selectedClass)) {
                  self.options.selected = null;
                  $li.removeClass([o.selectedClass, o.deselectableClass].join(' '));
                  self.$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, o.deselectableClass].join(' '));
                     showTab(a, $show);
                  });
                  this.blur();
                  return false;
               }
            }
			
            if (o.cookie) self._cookie(o.selected, o.cookie);
			
            // stop possibly running animations
            self.$panels.stop();
			
            // show new tab
            if ($show.length) {
               var a = this;
               self.load(self.$tabs.index(this), $hide.length ?
                  function() {
                     switchTab(a, $li, $hide, $show);
                  } :
                  function() {
                     $li.addClass(o.selectedClass);
                     showTab(a, $show);
                  }
                  );
            } 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 via CSS
            // in modern browsers; blur() removes focus from address bar in Firefox
            // which can become a usability and annoying problem with tabs('rotate').
            if ($.browser.msie) this.blur();
			
            return false;
			
         });
		
         // disable click if event is configured to something else
         if (o.event != 'click') 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._trigger('add', null, this.ui(this.$tabs[index], this.$panels[index]));
      },
      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._trigger('remove', null, this.ui($li.find('a')[0], $panel[0]));
      },
      enable: function(index) {
         var o = this.options;
         if ($.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._trigger('enable', null, this.ui(this.$tabs[index], this.$panels[index]));
      },
      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._trigger('disable', null, this.ui(this.$tabs[index], this.$panels[index]));
         }
      },
      select: function(index) {
         // TODO make null as argument work
         if (typeof index == 'string')
            index = this.$tabs.index( this.$tabs.filter('[href$=' + index + ']')[0] );
         this.$tabs.eq(index).trigger(this.options.event + '.tabs');
      },
      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.is(':not(img)') && $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) {
               $(self._sanitizeSelector(a.hash)).html(r);
               cleanup();
				
               if (o.cache)
                  $.data(a, 'cache.tabs', true); // if loaded once do not load them again
				
               // callbacks
               self._trigger('load', null, self.ui(self.$tabs[index], self.$panels[index]));
               try {
                  o.ajaxOptions.success(r, s);
               }
               catch (e) {}
				
               // 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);
         self.xhr = $.ajax(ajaxOptions);
      },
      url: function(index, url) {
         this.$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.deselectableClass,
                  o.disabledClass, o.panelClass, o.hideClass].join(' '));
         });
         if (o.cookie)
            this._cookie(null, o.cookie);
      }
   });

   $.extend($.ui.tabs, {
      version: '@VERSION',
      getter: 'length',
      defaults: {
         // basic setup
         deselectable: false,
         event: 'click',
         disabled: [],
         cookie: null, // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
         // Ajax
         spinner: 'Loading&#8230;',
         cache: false,
         idPrefix: 'ui-tabs-',
         ajaxOptions: null,
         // 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 class names
         navClass: 'ui-tabs-nav',
         selectedClass: 'ui-tabs-selected',
         deselectableClass: 'ui-tabs-deselectable',
         disabledClass: 'ui-tabs-disabled',
         panelClass: 'ui-tabs-panel',
         hideClass: 'ui-tabs-hide',
         loadingClass: 'ui-tabs-loading',
         sel: null
      }
   });

   /*
 * 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.$tabs.bind(this.options.event + '.tabs', stop);
            else
               this.$tabs.bind(this.options.event + '.tabs', function() {
                  stop();
                  t = self.options.selected;
                  start();
               });
         }
         // stop interval
         else {
            stop();
            this.$tabs.unbind(this.options.event + '.tabs', stop);
         }
      }
   });

})(jQuery);