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

* bootstrap-dropdown.js v2.3.1
* http://twitter.github.com/bootstrap/javascript.html#dropdowns
* ============================================================
* 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"; // jshint ;_;

/* DROPDOWN CLASS DEFINITION
 * ========================= */

 var toggle = '[data-toggle=dropdown]'
   , Dropdown = function (element) {
       var $el = $(element).on('click.dropdown.data-api', this.toggle)
       $('html').on('click.dropdown.data-api', function () {
         $el.parent().removeClass('open')
       })
     }

 Dropdown.prototype = {

   constructor: Dropdown

 , toggle: function (e) {
     var $this = $(this)
       , $parent
       , isActive

     if ($this.is('.disabled, :disabled')) return

     $parent = getParent($this)

     isActive = $parent.hasClass('open')

     clearMenus()

     if (!isActive) {
       $parent.toggleClass('open')
     }

     $this.focus()

     return false
   }

 , keydown: function (e) {
     var $this
       , $items
       , $active
       , $parent
       , isActive
       , index

     if (!/(38|40|27)/.test(e.keyCode)) return

     $this = $(this)

     e.preventDefault()
     e.stopPropagation()

     if ($this.is('.disabled, :disabled')) return

     $parent = getParent($this)

     isActive = $parent.hasClass('open')

     if (!isActive || (isActive && e.keyCode == 27)) {
       if (e.which == 27) $parent.find(toggle).focus()
       return $this.click()
     }

     $items = $('[role=menu] li:not(.divider):visible a', $parent)

     if (!$items.length) return

     index = $items.index($items.filter(':focus'))

     if (e.keyCode == 38 && index > 0) index--                                        // up
     if (e.keyCode == 40 && index < $items.length - 1) index++                        // down
     if (!~index) index = 0

     $items
       .eq(index)
       .focus()
   }

 }

 function clearMenus() {
   $(toggle).each(function () {
     getParent($(this)).removeClass('open')
   })
 }

 function getParent($this) {
   var selector = $this.attr('data-target')
     , $parent

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

   $parent = selector && $(selector)

   if (!$parent || !$parent.length) $parent = $this.parent()

   return $parent
 }

 /* DROPDOWN PLUGIN DEFINITION
  * ========================== */

 var old = $.fn.dropdown

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

 $.fn.dropdown.Constructor = Dropdown

/* DROPDOWN NO CONFLICT
 * ==================== */

 $.fn.dropdown.noConflict = function () {
   $.fn.dropdown = old
   return this
 }

 /* APPLY TO STANDARD DROPDOWN ELEMENTS
  * =================================== */

 $(document)
   .on('click.dropdown.data-api', clearMenus)
   .on('click.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
   .on('click.dropdown-menu', function (e) { e.stopPropagation() })
   .on('click.dropdown.data-api'  , toggle, Dropdown.prototype.toggle)
   .on('keydown.dropdown.data-api', toggle + ', [role=menu]' , Dropdown.prototype.keydown)

}(window.jQuery);