mirror of
https://github.com/twbs/bootstrap.git
synced 2024-11-29 11:24:18 +01:00
471 lines
14 KiB
JavaScript
471 lines
14 KiB
JavaScript
import $ from 'jquery'
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import Popper from 'popper.js'
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import Util from './util'
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/**
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* --------------------------------------------------------------------------
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* Bootstrap (v4.0.0-beta.3): dropdown.js
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
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* --------------------------------------------------------------------------
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*/
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const Dropdown = (($) => {
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/**
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* ------------------------------------------------------------------------
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* Constants
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* ------------------------------------------------------------------------
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*/
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const NAME = 'dropdown'
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const VERSION = '4.0.0-beta.3'
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const DATA_KEY = 'bs.dropdown'
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const EVENT_KEY = `.${DATA_KEY}`
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const DATA_API_KEY = '.data-api'
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const JQUERY_NO_CONFLICT = $.fn[NAME]
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const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key
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const SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key
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const TAB_KEYCODE = 9 // KeyboardEvent.which value for tab key
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const ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key
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const ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key
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const RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse)
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const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`)
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const Event = {
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HIDE : `hide${EVENT_KEY}`,
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HIDDEN : `hidden${EVENT_KEY}`,
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SHOW : `show${EVENT_KEY}`,
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SHOWN : `shown${EVENT_KEY}`,
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CLICK : `click${EVENT_KEY}`,
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CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`,
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KEYDOWN_DATA_API : `keydown${EVENT_KEY}${DATA_API_KEY}`,
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KEYUP_DATA_API : `keyup${EVENT_KEY}${DATA_API_KEY}`
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}
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const ClassName = {
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DISABLED : 'disabled',
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SHOW : 'show',
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DROPUP : 'dropup',
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DROPRIGHT : 'dropright',
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DROPLEFT : 'dropleft',
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MENURIGHT : 'dropdown-menu-right',
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MENULEFT : 'dropdown-menu-left',
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POSITION_STATIC : 'position-static'
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}
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const Selector = {
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DATA_TOGGLE : '[data-toggle="dropdown"]',
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FORM_CHILD : '.dropdown form',
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MENU : '.dropdown-menu',
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NAVBAR_NAV : '.navbar-nav',
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VISIBLE_ITEMS : '.dropdown-menu .dropdown-item:not(.disabled)'
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}
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const AttachmentMap = {
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TOP : 'top-start',
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TOPEND : 'top-end',
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BOTTOM : 'bottom-start',
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BOTTOMEND : 'bottom-end',
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RIGHT : 'right-start',
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RIGHTEND : 'right-end',
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LEFT : 'left-start',
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LEFTEND : 'left-end'
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}
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const Default = {
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offset : 0,
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flip : true,
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boundary : 'scrollParent'
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}
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const DefaultType = {
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offset : '(number|string|function)',
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flip : 'boolean',
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boundary : '(string|element)'
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}
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/**
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* ------------------------------------------------------------------------
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* Class Definition
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* ------------------------------------------------------------------------
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*/
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class Dropdown {
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constructor(element, config) {
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this._element = element
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this._popper = null
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this._config = this._getConfig(config)
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this._menu = this._getMenuElement()
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this._inNavbar = this._detectNavbar()
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this._addEventListeners()
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}
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// Getters
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static get VERSION() {
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return VERSION
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}
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static get Default() {
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return Default
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}
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static get DefaultType() {
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return DefaultType
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}
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// Public
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toggle() {
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if (this._element.disabled || $(this._element).hasClass(ClassName.DISABLED)) {
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return
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}
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const parent = Dropdown._getParentFromElement(this._element)
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const isActive = $(this._menu).hasClass(ClassName.SHOW)
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Dropdown._clearMenus()
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if (isActive) {
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return
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}
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const relatedTarget = {
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relatedTarget: this._element
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}
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const showEvent = $.Event(Event.SHOW, relatedTarget)
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$(parent).trigger(showEvent)
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if (showEvent.isDefaultPrevented()) {
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return
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}
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// Disable totally Popper.js for Dropdown in Navbar
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if (!this._inNavbar) {
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/**
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* Check for Popper dependency
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* Popper - https://popper.js.org
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*/
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if (typeof Popper === 'undefined') {
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throw new TypeError('Bootstrap dropdown require Popper.js (https://popper.js.org)')
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}
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let element = this._element
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// For dropup with alignment we use the parent as popper container
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if ($(parent).hasClass(ClassName.DROPUP)) {
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if ($(this._menu).hasClass(ClassName.MENULEFT) || $(this._menu).hasClass(ClassName.MENURIGHT)) {
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element = parent
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}
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}
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// If boundary is not `scrollParent`, then set position to `static`
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// to allow the menu to "escape" the scroll parent's boundaries
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// https://github.com/twbs/bootstrap/issues/24251
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if (this._config.boundary !== 'scrollParent') {
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$(parent).addClass(ClassName.POSITION_STATIC)
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}
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this._popper = new Popper(element, this._menu, this._getPopperConfig())
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}
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// If this is a touch-enabled device we add extra
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// empty mouseover listeners to the body's immediate children;
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// only needed because of broken event delegation on iOS
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// https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
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if ('ontouchstart' in document.documentElement &&
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$(parent).closest(Selector.NAVBAR_NAV).length === 0) {
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$('body').children().on('mouseover', null, $.noop)
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}
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this._element.focus()
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this._element.setAttribute('aria-expanded', true)
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$(this._menu).toggleClass(ClassName.SHOW)
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$(parent)
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.toggleClass(ClassName.SHOW)
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.trigger($.Event(Event.SHOWN, relatedTarget))
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}
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dispose() {
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$.removeData(this._element, DATA_KEY)
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$(this._element).off(EVENT_KEY)
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this._element = null
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this._menu = null
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if (this._popper !== null) {
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this._popper.destroy()
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this._popper = null
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}
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}
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update() {
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this._inNavbar = this._detectNavbar()
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if (this._popper !== null) {
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this._popper.scheduleUpdate()
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}
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}
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// Private
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_addEventListeners() {
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$(this._element).on(Event.CLICK, (event) => {
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event.preventDefault()
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event.stopPropagation()
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this.toggle()
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})
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}
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_getConfig(config) {
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config = {
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...this.constructor.Default,
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...$(this._element).data(),
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...config
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}
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Util.typeCheckConfig(
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NAME,
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config,
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this.constructor.DefaultType
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)
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return config
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}
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_getMenuElement() {
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if (!this._menu) {
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const parent = Dropdown._getParentFromElement(this._element)
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this._menu = $(parent).find(Selector.MENU)[0]
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}
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return this._menu
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}
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_getPlacement() {
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const $parentDropdown = $(this._element).parent()
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let placement = AttachmentMap.BOTTOM
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// Handle dropup
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if ($parentDropdown.hasClass(ClassName.DROPUP)) {
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placement = AttachmentMap.TOP
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if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
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placement = AttachmentMap.TOPEND
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}
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} else if ($parentDropdown.hasClass(ClassName.DROPRIGHT)) {
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placement = AttachmentMap.RIGHT
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} else if ($parentDropdown.hasClass(ClassName.DROPLEFT)) {
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placement = AttachmentMap.LEFT
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} else if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
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placement = AttachmentMap.BOTTOMEND
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}
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return placement
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}
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_detectNavbar() {
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return $(this._element).closest('.navbar').length > 0
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}
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_getPopperConfig() {
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const offsetConf = {}
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if (typeof this._config.offset === 'function') {
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offsetConf.fn = (data) => {
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data.offsets = {
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...data.offsets,
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...this._config.offset(data.offsets) || {}
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}
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return data
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}
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} else {
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offsetConf.offset = this._config.offset
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}
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const popperConfig = {
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placement: this._getPlacement(),
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modifiers: {
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offset: offsetConf,
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flip: {
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enabled: this._config.flip
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},
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preventOverflow: {
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boundariesElement: this._config.boundary
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}
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}
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}
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return popperConfig
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}
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// Static
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static _jQueryInterface(config) {
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return this.each(function () {
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let data = $(this).data(DATA_KEY)
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const _config = typeof config === 'object' ? config : null
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if (!data) {
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data = new Dropdown(this, _config)
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$(this).data(DATA_KEY, data)
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}
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if (typeof config === 'string') {
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if (typeof data[config] === 'undefined') {
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throw new TypeError(`No method named "${config}"`)
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}
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data[config]()
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}
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})
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}
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static _clearMenus(event) {
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if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH ||
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event.type === 'keyup' && event.which !== TAB_KEYCODE)) {
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return
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}
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const toggles = $.makeArray($(Selector.DATA_TOGGLE))
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for (let i = 0; i < toggles.length; i++) {
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const parent = Dropdown._getParentFromElement(toggles[i])
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const context = $(toggles[i]).data(DATA_KEY)
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const relatedTarget = {
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relatedTarget: toggles[i]
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}
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if (!context) {
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continue
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}
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const dropdownMenu = context._menu
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if (!$(parent).hasClass(ClassName.SHOW)) {
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continue
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}
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if (event && (event.type === 'click' &&
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/input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) &&
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$.contains(parent, event.target)) {
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continue
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}
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const hideEvent = $.Event(Event.HIDE, relatedTarget)
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$(parent).trigger(hideEvent)
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if (hideEvent.isDefaultPrevented()) {
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continue
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}
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// If this is a touch-enabled device we remove the extra
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// empty mouseover listeners we added for iOS support
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if ('ontouchstart' in document.documentElement) {
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$('body').children().off('mouseover', null, $.noop)
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}
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toggles[i].setAttribute('aria-expanded', 'false')
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$(dropdownMenu).removeClass(ClassName.SHOW)
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$(parent)
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.removeClass(ClassName.SHOW)
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.trigger($.Event(Event.HIDDEN, relatedTarget))
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}
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}
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static _getParentFromElement(element) {
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let parent
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const selector = Util.getSelectorFromElement(element)
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if (selector) {
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parent = $(selector)[0]
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}
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return parent || element.parentNode
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}
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// eslint-disable-next-line complexity
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static _dataApiKeydownHandler(event) {
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// If not input/textarea:
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// - And not a key in REGEXP_KEYDOWN => not a dropdown command
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// If input/textarea:
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// - If space key => not a dropdown command
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// - If key is other than escape
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// - If key is not up or down => not a dropdown command
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// - If trigger inside the menu => not a dropdown command
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if (/input|textarea/i.test(event.target.tagName)
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? event.which === SPACE_KEYCODE || event.which !== ESCAPE_KEYCODE &&
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(event.which !== ARROW_DOWN_KEYCODE && event.which !== ARROW_UP_KEYCODE ||
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$(event.target).closest(Selector.MENU).length) : !REGEXP_KEYDOWN.test(event.which)) {
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return
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}
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event.preventDefault()
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event.stopPropagation()
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if (this.disabled || $(this).hasClass(ClassName.DISABLED)) {
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return
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}
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const parent = Dropdown._getParentFromElement(this)
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const isActive = $(parent).hasClass(ClassName.SHOW)
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if (!isActive && (event.which !== ESCAPE_KEYCODE || event.which !== SPACE_KEYCODE) ||
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isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
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if (event.which === ESCAPE_KEYCODE) {
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const toggle = $(parent).find(Selector.DATA_TOGGLE)[0]
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$(toggle).trigger('focus')
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}
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$(this).trigger('click')
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return
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}
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const items = $(parent).find(Selector.VISIBLE_ITEMS).get()
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if (items.length === 0) {
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return
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}
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let index = items.indexOf(event.target)
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if (event.which === ARROW_UP_KEYCODE && index > 0) { // Up
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index--
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}
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if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // Down
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index++
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}
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if (index < 0) {
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index = 0
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}
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items[index].focus()
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}
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}
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/**
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* ------------------------------------------------------------------------
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* Data Api implementation
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* ------------------------------------------------------------------------
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*/
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$(document)
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.on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler)
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.on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler)
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.on(`${Event.CLICK_DATA_API} ${Event.KEYUP_DATA_API}`, Dropdown._clearMenus)
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.on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
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event.preventDefault()
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event.stopPropagation()
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Dropdown._jQueryInterface.call($(this), 'toggle')
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})
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.on(Event.CLICK_DATA_API, Selector.FORM_CHILD, (e) => {
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e.stopPropagation()
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})
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/**
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* ------------------------------------------------------------------------
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* jQuery
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* ------------------------------------------------------------------------
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*/
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$.fn[NAME] = Dropdown._jQueryInterface
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$.fn[NAME].Constructor = Dropdown
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$.fn[NAME].noConflict = function () {
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$.fn[NAME] = JQUERY_NO_CONFLICT
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return Dropdown._jQueryInterface
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}
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return Dropdown
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})($, Popper)
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export default Dropdown
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