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

  * 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);