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XhmikosR authoreda950d564
/* global Popper */import Util from './util'/** * -------------------------------------------------------------------------- * Bootstrap (v4.0.0-alpha.6): dropdown.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */const Dropdown = (($) => { /** * Check for Popper dependency * Popper - https://popper.js.org */ if (typeof Popper === 'undefined') { throw new Error('Bootstrap dropdown require Popper.js (https://popper.js.org)') } /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ const NAME = 'dropdown' const VERSION = '4.0.0-alpha.6' const DATA_KEY = 'bs.dropdown' const EVENT_KEY = `.${DATA_KEY}` const DATA_API_KEY = '.data-api' const JQUERY_NO_CONFLICT = $.fn[NAME] const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key const SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key const TAB_KEYCODE = 9 // KeyboardEvent.which value for tab key const ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key const ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key const RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse) const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`) const Event = { HIDE : `hide${EVENT_KEY}`, HIDDEN : `hidden${EVENT_KEY}`, SHOW : `show${EVENT_KEY}`, SHOWN : `shown${EVENT_KEY}`, CLICK : `click${EVENT_KEY}`, CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`, KEYDOWN_DATA_API : `keydown${EVENT_KEY}${DATA_API_KEY}`, KEYUP_DATA_API : `keyup${EVENT_KEY}${DATA_API_KEY}` } const ClassName = { DISABLED : 'disabled', SHOW : 'show' } const Selector = { DATA_TOGGLE : '[data-toggle="dropdown"]', FORM_CHILD : '.dropdown form', MENU : '.dropdown-menu', NAVBAR_NAV : '.navbar-nav', VISIBLE_ITEMS : '.dropdown-menu .dropdown-item:not(.disabled)' } const AttachmentMap = { TOP : 'top-start', BOTTOM : 'bottom-start' }7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
const Default = {
placement : AttachmentMap.BOTTOM,
offset : 0
}
const DefaultType = {
placement : 'string',
offset : '(number|string)'
}
/**
* ------------------------------------------------------------------------
* Class Definition
* ------------------------------------------------------------------------
*/
class Dropdown {
constructor(element, config) {
this._element = element
this._popper = null
this._config = this._getConfig(config)
this._menu = this._getMenuElement()
this._addEventListeners()
}
// getters
static get VERSION() {
return VERSION
}
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
// public
toggle() {
let context = $(this).data(DATA_KEY)
if (!context) {
context = new Dropdown(this)
$(this).data(DATA_KEY, context)
}
if (context.disabled || $(this).hasClass(ClassName.DISABLED)) {
return false
}
const parent = Dropdown._getParentFromElement(this)
const isActive = $(context._menu).hasClass(ClassName.SHOW)
Dropdown._clearMenus()
if (isActive) {
return false
}
const relatedTarget = {
relatedTarget : this
}
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const showEvent = $.Event(Event.SHOW, relatedTarget)
$(parent).trigger(showEvent)
if (showEvent.isDefaultPrevented()) {
return false
}
// Handle dropup
const dropdownPlacement = $(this).parent().hasClass('dropup') ? AttachmentMap.TOP : context._config.placement
this._popper = new Popper(this, context._menu, {
placement : dropdownPlacement,
modifiers : {
offset : {
offset : context._config.offset
}
}
})
// if this is a touch-enabled device we add extra
// empty mouseover listeners to the body's immediate children;
// only needed because of broken event delegation on iOS
// https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
if ('ontouchstart' in document.documentElement &&
!$(parent).closest(Selector.NAVBAR_NAV).length) {
$('body').children().on('mouseover', null, $.noop)
}
this.focus()
this.setAttribute('aria-expanded', true)
$(context._menu).toggleClass(ClassName.SHOW)
$(parent)
.toggleClass(ClassName.SHOW)
.trigger($.Event(Event.SHOWN, relatedTarget))
return false
}
dispose() {
$.removeData(this._element, DATA_KEY)
$(this._element).off(EVENT_KEY)
this._element = null
this._menu = null
if (this._popper !== null) {
this._popper.destroy()
}
}
// private
_addEventListeners() {
$(this._element).on(Event.CLICK, this.toggle)
}
_getConfig(config) {
config = $.extend(
{},
this.constructor.Default,
$(this._element).data(),
config
)
Util.typeCheckConfig(
NAME,
config,
this.constructor.DefaultType
)
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return config
}
_getMenuElement() {
if (!this._menu) {
const parent = Dropdown._getParentFromElement(this._element)
this._menu = $(parent).find(Selector.MENU)[0]
}
return this._menu
}
// static
static _jQueryInterface(config) {
return this.each(function () {
let data = $(this).data(DATA_KEY)
const _config = typeof config === 'object' ? config : null
if (!data) {
data = new Dropdown(this, _config)
$(this).data(DATA_KEY, data)
}
if (typeof config === 'string') {
if (data[config] === undefined) {
throw new Error(`No method named "${config}"`)
}
data[config].call(this)
}
})
}
static _clearMenus(event) {
if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH ||
event.type === 'keyup' && event.which !== TAB_KEYCODE)) {
return
}
const toggles = $.makeArray($(Selector.DATA_TOGGLE))
for (let i = 0; i < toggles.length; i++) {
const parent = Dropdown._getParentFromElement(toggles[i])
const context = $(toggles[i]).data(DATA_KEY)
const relatedTarget = {
relatedTarget : toggles[i]
}
if (!context) {
continue
}
const dropdownMenu = context._menu
if (!$(parent).hasClass(ClassName.SHOW)) {
continue
}
if (event && (event.type === 'click' &&
/input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE)
&& $.contains(parent, event.target)) {
continue
}
const hideEvent = $.Event(Event.HIDE, relatedTarget)
$(parent).trigger(hideEvent)
if (hideEvent.isDefaultPrevented()) {
continue
}
// if this is a touch-enabled device we remove the extra
// empty mouseover listeners we added for iOS support
if ('ontouchstart' in document.documentElement) {
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$('body').children().off('mouseover', null, $.noop)
}
toggles[i].setAttribute('aria-expanded', 'false')
$(dropdownMenu).removeClass(ClassName.SHOW)
$(parent)
.removeClass(ClassName.SHOW)
.trigger($.Event(Event.HIDDEN, relatedTarget))
}
}
static _getParentFromElement(element) {
let parent
const selector = Util.getSelectorFromElement(element)
if (selector) {
parent = $(selector)[0]
}
return parent || element.parentNode
}
static _dataApiKeydownHandler(event) {
if (!REGEXP_KEYDOWN.test(event.which) || /button/i.test(event.target.tagName) && event.which === SPACE_KEYCODE ||
/input|textarea/i.test(event.target.tagName)) {
return
}
event.preventDefault()
event.stopPropagation()
if (this.disabled || $(this).hasClass(ClassName.DISABLED)) {
return
}
const parent = Dropdown._getParentFromElement(this)
const isActive = $(parent).hasClass(ClassName.SHOW)
if (!isActive && (event.which !== ESCAPE_KEYCODE || event.which !== SPACE_KEYCODE) ||
isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
if (event.which === ESCAPE_KEYCODE) {
const toggle = $(parent).find(Selector.DATA_TOGGLE)[0]
$(toggle).trigger('focus')
}
$(this).trigger('click')
return
}
const items = $(parent).find(Selector.VISIBLE_ITEMS).get()
if (!items.length) {
return
}
let index = items.indexOf(event.target)
if (event.which === ARROW_UP_KEYCODE && index > 0) { // up
index--
}
if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // down
index++
}
if (index < 0) {
index = 0
}
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items[index].focus()
}
}
/**
* ------------------------------------------------------------------------
* Data Api implementation
* ------------------------------------------------------------------------
*/
$(document)
.on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler)
.on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler)
.on(`${Event.CLICK_DATA_API} ${Event.KEYUP_DATA_API}`, Dropdown._clearMenus)
.on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, Dropdown.prototype.toggle)
.on(Event.CLICK_DATA_API, Selector.FORM_CHILD, (e) => {
e.stopPropagation()
})
/**
* ------------------------------------------------------------------------
* jQuery
* ------------------------------------------------------------------------
*/
$.fn[NAME] = Dropdown._jQueryInterface
$.fn[NAME].Constructor = Dropdown
$.fn[NAME].noConflict = function () {
$.fn[NAME] = JQUERY_NO_CONFLICT
return Dropdown._jQueryInterface
}
return Dropdown
})(jQuery)
export default Dropdown