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Johann-S authoredeb81c39f
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 = (($) => { /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ const NAME = 'dropdown' const VERSION = '4.0.0-alpha.6' const DATA_KEY = 'bs.dropdown' const EVENT_KEY = `.${DATA_KEY}` const DATA_API_KEY = '.data-api' const JQUERY_NO_CONFLICT = $.fn[NAME] const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key const SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key const ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key const ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key const RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse) const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}|${SPACE_KEYCODE}`) const Event = { HIDE : `hide${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}`, FOCUSIN_DATA_API : `focusin${EVENT_KEY}${DATA_API_KEY}`, KEYDOWN_DATA_API : `keydown${EVENT_KEY}${DATA_API_KEY}` } const ClassName = { BACKDROP : 'dropdown-backdrop', DISABLED : 'disabled', SHOW : 'show' } const Selector = { BACKDROP : '.dropdown-backdrop', DATA_TOGGLE : '[data-toggle="dropdown"]', FORM_CHILD : '.dropdown form', ROLE_MENU : '[role="menu"]', ROLE_LISTBOX : '[role="listbox"]', NAVBAR_NAV : '.navbar-nav', VISIBLE_ITEMS : '[role="menu"] li:not(.disabled) a, ' + '[role="listbox"] li:not(.disabled) a' } /** * ------------------------------------------------------------------------ * Class Definition * ------------------------------------------------------------------------ */ class Dropdown { constructor(element) {7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
this._element = element
this._addEventListeners()
}
// getters
static get VERSION() {
return VERSION
}
// public
toggle() {
if (this.disabled || $(this).hasClass(ClassName.DISABLED)) {
return false
}
const parent = Dropdown._getParentFromElement(this)
const isActive = $(parent).hasClass(ClassName.SHOW)
Dropdown._clearMenus()
if (isActive) {
return false
}
const relatedTarget = {
relatedTarget : this
}
const showEvent = $.Event(Event.SHOW, relatedTarget)
$(parent).trigger(showEvent)
if (showEvent.isDefaultPrevented()) {
return false
}
// set the backdrop only if the dropdown menu will be opened
if ('ontouchstart' in document.documentElement &&
!$(parent).closest(Selector.NAVBAR_NAV).length) {
// if mobile we use a backdrop because click events don't delegate
const dropdown = document.createElement('div')
dropdown.className = ClassName.BACKDROP
$(dropdown).insertBefore(this)
$(dropdown).on('click', Dropdown._clearMenus)
}
this.focus()
this.setAttribute('aria-expanded', true)
$(parent).toggleClass(ClassName.SHOW)
$(parent).trigger($.Event(Event.SHOWN, relatedTarget))
return false
}
dispose() {
$.removeData(this._element, DATA_KEY)
$(this._element).off(EVENT_KEY)
this._element = null
}
// private
_addEventListeners() {
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$(this._element).on(Event.CLICK, this.toggle)
}
// static
static _jQueryInterface(config) {
return this.each(function () {
let data = $(this).data(DATA_KEY)
if (!data) {
data = new Dropdown(this)
$(this).data(DATA_KEY, data)
}
if (typeof config === 'string') {
if (data[config] === undefined) {
throw new Error(`No method named "${config}"`)
}
data[config].call(this)
}
})
}
static _clearMenus(event) {
if (event && event.which === RIGHT_MOUSE_BUTTON_WHICH) {
return
}
const toggles = $.makeArray($(Selector.DATA_TOGGLE))
for (let i = 0; i < toggles.length; i++) {
const parent = Dropdown._getParentFromElement(toggles[i])
const relatedTarget = {
relatedTarget : toggles[i]
}
if (!$(parent).hasClass(ClassName.SHOW)) {
continue
}
if (event && (event.type === 'click' &&
/input|textarea/i.test(event.target.tagName) || event.type === 'focusin')
&& $.contains(parent, event.target)) {
continue
}
const hideEvent = $.Event(Event.HIDE, relatedTarget)
$(parent).trigger(hideEvent)
if (hideEvent.isDefaultPrevented()) {
continue
}
// remove backdrop only if the dropdown menu will be hidden
const backdrop = $(parent).find(Selector.BACKDROP)[0]
if (backdrop) {
backdrop.parentNode.removeChild(backdrop)
}
toggles[i].setAttribute('aria-expanded', 'false')
$(parent)
.removeClass(ClassName.SHOW)
.trigger($.Event(Event.HIDDEN, relatedTarget))
}
}
static _getParentFromElement(element) {
let parent
const selector = Util.getSelectorFromElement(element)
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if (selector) {
parent = $(selector)[0]
}
return parent || element.parentNode
}
static _dataApiKeydownHandler(event) {
if (!REGEXP_KEYDOWN.test(event.which) ||
/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 ||
isActive && event.which === ESCAPE_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
}
items[index].focus()
}
}
/**
* ------------------------------------------------------------------------
* Data Api implementation
* ------------------------------------------------------------------------
*/
$(document)
.on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler)
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.on(Event.KEYDOWN_DATA_API, Selector.ROLE_MENU, Dropdown._dataApiKeydownHandler)
.on(Event.KEYDOWN_DATA_API, Selector.ROLE_LISTBOX, Dropdown._dataApiKeydownHandler)
.on(`${Event.CLICK_DATA_API} ${Event.FOCUSIN_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