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Edit File: bootstrap-dropdown.js

/* ============================================================
 * 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);