lixin-web/webapp/js/plugins/dropdown.js

vue and bootstrap

/* ========================================================================
 * Bootstrap: dropdown.js v3.0.0
 * http://twbs.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.
 * ======================================================================== */
import {throttle}  from 'lodash'
export default function ($,hoverBreakpoint) { "use strict";

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

//  var backdrop = '.toggle-backdrop'
  var toggle   = '[data-toggle="dropdown"]'
  var toggleHover   = '[data-toggle=dropdown-hover]'
  var mouseEnterStart;
  var $doc = $(document)
  var Dropdown = function (element) {
    $(element).on('click.bs.dropdown', this.toggle);
  }
  Dropdown.hoverBreakpoint = hoverBreakpoint || 768;

  Dropdown.TRANSITION_DURATION = 300

  Dropdown.prototype.toggle = function(e){
    var $this = $(this)

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

    var $parent  = getParent($this)
    var $menu = $parent.find('.dropdown-menu')
    var isActive = $parent.hasClass('open')
    if ($this.data('toggle') == 'dropdown'){
      //data-toggle="dropdown" click
      //data-toggle="dropdown-hover" mouseenter
      clearMenus(toggle)
    }else{
      mouseEnterStart = true;
      $parent.one('mouseleave.bs.toggle.data-api',throttle ? throttle(function () {
        mouseleave($this)
      },100) : function () {
        mouseleave($this)
      })
    }

    if (!isActive) {
      var relatedTarget = { relatedTarget: this }
      $parent.trigger(e = $.Event('show.bs.toggle',relatedTarget))

      if (e.isDefaultPrevented()) return

      $this.trigger('focus')
          .attr('aria-expanded', 'true')
      $parent
        .addClass('open')
        .trigger($.Event('shown.bs.dropdown', relatedTarget))
      $menu.hasClass('fade') && setTimeout(function () {
        $menu.addClass('in')
      })
    }
    return false
  }
  Dropdown.prototype.keydown = function (e) {
    if (!/(38|40|27)/.test(e.keyCode)) return

    var $this = $(this)

    e.preventDefault()
    e.stopPropagation()

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

    var $parent  = getParent($this)
    var isActive = $parent.hasClass('open')
    if (!isActive || (isActive && e.keyCode == 27)) {
      if (e.which == 27) {
        $parent.find(toggle + ',' + toggleHover).trigger('focus')
      }
      return $this.trigger($this.data('toggle') === 'dropdown-hover' ? 'mouseenter':'click');
    }

    var desc = ' li:not(.divider):visible a'
    var $items = $parent.find('[role="menu"]' + desc + ', [role="listbox"]' + desc)

    if (!$items.length) return

    var 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).trigger('focus')
  }

   function mouseleave ($ele) {
    clearMenus(toggleHover);
    mouseEnterStart = false
    // $ele.blur();
  }

  Dropdown.prototype.mouseleave = mouseleave

  function clearMenus(toggle) {
//    $(backdrop).remove()
    $(toggle).each(function (e) {
      var $this         = $(this)
      var $parent = getParent($this)
      var $menu = $parent.find('.dropdown-menu')
      var relatedTarget = { relatedTarget: this }
      if (!$parent.hasClass('open')) return
      $parent.trigger(e = $.Event('hide.bs.toggle',relatedTarget))
      if (e.isDefaultPrevented()) return
      $this.attr('aria-expanded', 'false')
      if ($.support.transition && $menu.hasClass('fade')) {
        $menu.removeClass('in').one('bsTransitionEnd', function () {
          $parent.removeClass('open').trigger($.Event('hidden.bs.dropdown', relatedTarget))
        })
          .emulateTransitionEnd(Dropdown.TRANSITION_DURATION)

      }else{
        $parent.removeClass('open').trigger($.Event('hidden.bs.dropdown', relatedTarget))
      }
    })
  }

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

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

    var $parent = selector && $(selector)

    return $parent && $parent.length ? $parent : $this.parent()
  }


  // dropdown PLUGIN DEFINITION
  // ==========================

  var old = $.fn.dropdown

  $.fn.dropdown = function (option) {
    return this.each(function () {
      var $this = $(this)
      var 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.toggle = old
    return this
  }


  // APPLY TO STANDARD dropdown ELEMENTS
  // ===================================

  $doc
    .on('click.bs.toggle.data-api', function(e){
      !mouseEnterStart && clearMenus(toggle)//click only
    })
    .on('click.bs.toggle.data-api', '.toggle form', function (e) { e.stopPropagation() })
    .on('click.bs.toggle.data-api'  , toggle, Dropdown.prototype.toggle)
    .on('keydown.bs.toggle.data-api', toggle + ', [role=menu] ,' + toggle, Dropdown.prototype.keydown);
  (screen ? screen.width : document.documentElement.clientWidth) > Dropdown.hoverBreakpoint && 
    $doc.on('mouseenter.bs.dropdown.data-api', toggleHover, throttle ? throttle(Dropdown.prototype.toggle,100) : Dropdown.prototype.toggle)



}