/* ========================================================

* bootstrap-tab.js v2.0.2
* http://twitter.github.com/bootstrap/javascript.html#tabs
* ========================================================
* Copyright 2012 Twitter, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ======================================================== */

!function( $ ){

 "use strict"

/* TAB CLASS DEFINITION
 * ==================== */

 var Tab = function ( element ) {
   this.element = $(element)
 }

 Tab.prototype = {

   constructor: Tab

 , show: function () {
     var $this = this.element
       , $ul = $this.closest('ul:not(.dropdown-menu)')
       , selector = $this.attr('data-target')
       , previous
       , $target

     if (!selector) {
       selector = $this.attr('href')
       selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
     }

     if ( $this.parent('li').hasClass('active') ) return

     previous = $ul.find('.active a').last()[0]

     $this.trigger({
       type: 'show'
     , relatedTarget: previous
     })

     $target = $(selector)

     this.activate($this.parent('li'), $ul)
     this.activate($target, $target.parent(), function () {
       $this.trigger({
         type: 'shown'
       , relatedTarget: previous
       })
     })
   }

 , activate: function ( element, container, callback) {
     var $active = container.find('> .active')
       , transition = callback
           && $.support.transition
           && $active.hasClass('fade')

     function next() {
       $active
         .removeClass('active')
         .find('> .dropdown-menu > .active')
         .removeClass('active')

       element.addClass('active')

       if (transition) {
         element[0].offsetWidth // reflow for transition
         element.addClass('in')
       } else {
         element.removeClass('fade')
       }

       if ( element.parent('.dropdown-menu') ) {
         element.closest('li.dropdown').addClass('active')
       }

       callback && callback()
     }

     transition ?
       $active.one($.support.transition.end, next) :
       next()

     $active.removeClass('in')
   }
 }

/* TAB PLUGIN DEFINITION
 * ===================== */

 $.fn.tab = function ( option ) {
   return this.each(function () {
     var $this = $(this)
       , data = $this.data('tab')
     if (!data) $this.data('tab', (data = new Tab(this)))
     if (typeof option == 'string') data[option]()
   })
 }

 $.fn.tab.Constructor = Tab

/* TAB DATA-API
 * ============ */

 $(function () {
   $('body').on('click.tab.data-api', '[data-toggle="tab"], [data-toggle="pill"]', function (e) {
     e.preventDefault()
     $(this).tab('show')
   })
 })

}( window.jQuery );