/*
 * 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'
   }
});

/*
 * 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);