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

 * 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);