mirror of https://github.com/twbs/bootstrap.git
156 lines
4.4 KiB
JavaScript
156 lines
4.4 KiB
JavaScript
/* ========================================================================
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* Bootstrap: dropdown.js v3.0.0
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* http://twitter.github.com/bootstrap/javascript.html#dropdowns
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* ========================================================================
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* Copyright 2012 Twitter, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ======================================================================== */
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+function ($) { "use strict";
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// DROPDOWN CLASS DEFINITION
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// =========================
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var backdrop = '.dropdown-backdrop'
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var toggle = '[data-toggle=dropdown]'
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var Dropdown = function (element) {
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var $el = $(element).on('click.bs.dropdown', this.toggle)
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}
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Dropdown.prototype.toggle = function (e) {
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var $this = $(this)
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if ($this.is('.disabled, :disabled')) return
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var $parent = getParent($this)
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var isActive = $parent.hasClass('open')
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clearMenus()
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if (!isActive) {
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if ('ontouchstart' in document.documentElement) {
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// if mobile we we use a backdrop because click events don't delegate
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$('<div class="dropdown-backdrop"/>').insertBefore($(this)).on('click', clearMenus)
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}
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$parent.trigger(e = $.Event('show.bs.dropdown'))
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if (e.isDefaultPrevented()) return
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$parent
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.toggleClass('open')
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.trigger('shown.bs.dropdown')
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}
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$this.focus()
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return false
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}
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Dropdown.prototype.keydown = function (e) {
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if (!/(38|40|27)/.test(e.keyCode)) return
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var $this = $(this)
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e.preventDefault()
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e.stopPropagation()
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if ($this.is('.disabled, :disabled')) return
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var $parent = getParent($this)
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var isActive = $parent.hasClass('open')
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if (!isActive || (isActive && e.keyCode == 27)) {
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if (e.which == 27) $parent.find(toggle).focus()
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return $this.click()
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}
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var $items = $('[role=menu] li:not(.divider):visible a', $parent)
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if (!$items.length) return
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var index = $items.index($items.filter(':focus'))
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if (e.keyCode == 38 && index > 0) index-- // up
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if (e.keyCode == 40 && index < $items.length - 1) index++ // down
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if (!~index) index=0
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$items.eq(index).focus()
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}
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function clearMenus() {
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$(backdrop).remove()
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$(toggle).each(function (e) {
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var $parent = getParent($(this))
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if (!$parent.hasClass('open')) return
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$parent.trigger(e = $.Event('hide.bs.dropdown'))
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if (e.isDefaultPrevented()) return
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$parent.removeClass('open').trigger('hidden.bs.dropdown')
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})
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}
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function getParent($this) {
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var selector = $this.attr('data-target')
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if (!selector) {
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selector = $this.attr('href')
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selector = selector && /#/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
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}
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var $parent = selector && $(selector)
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return $parent && $parent.length ? $parent : $this.parent()
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}
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// DROPDOWN PLUGIN DEFINITION
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// ==========================
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var old = $.fn.dropdown
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$.fn.dropdown = function (option) {
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return this.each(function () {
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var $this = $(this)
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var data = $this.data('dropdown')
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if (!data) $this.data('dropdown', (data = new Dropdown(this)))
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if (typeof option == 'string') data[option].call($this)
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})
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}
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$.fn.dropdown.Constructor = Dropdown
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// DROPDOWN NO CONFLICT
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// ====================
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$.fn.dropdown.noConflict = function () {
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$.fn.dropdown = old
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return this
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}
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// APPLY TO STANDARD DROPDOWN ELEMENTS
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// ===================================
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$(document)
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.on('click.bs.dropdown.data-api', clearMenus)
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.on('click.bs.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
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.on('click.bs.dropdown.data-api' , toggle, Dropdown.prototype.toggle)
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.on('keydown.bs.dropdown.data-api', toggle + ', [role=menu]' , Dropdown.prototype.keydown)
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}(window.jQuery);
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