539 lines
14 KiB
JavaScript
539 lines
14 KiB
JavaScript
/**
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* --------------------------------------------------------------------------
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* Bootstrap (v4.6.0): dropdown.js
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
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* --------------------------------------------------------------------------
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*/
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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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* Constants
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* ------------------------------------------------------------------------
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*/
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const NAME = 'dropdown'
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const VERSION = '4.6.0'
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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_HIDE = `hide${EVENT_KEY}`
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const EVENT_HIDDEN = `hidden${EVENT_KEY}`
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const EVENT_SHOW = `show${EVENT_KEY}`
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const EVENT_SHOWN = `shown${EVENT_KEY}`
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const EVENT_CLICK = `click${EVENT_KEY}`
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const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
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const EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY}${DATA_API_KEY}`
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const EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY}${DATA_API_KEY}`
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const CLASS_NAME_DISABLED = 'disabled'
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const CLASS_NAME_SHOW = 'show'
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const CLASS_NAME_DROPUP = 'dropup'
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const CLASS_NAME_DROPRIGHT = 'dropright'
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const CLASS_NAME_DROPLEFT = 'dropleft'
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const CLASS_NAME_MENURIGHT = 'dropdown-menu-right'
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const CLASS_NAME_POSITION_STATIC = 'position-static'
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const SELECTOR_DATA_TOGGLE = '[data-toggle="dropdown"]'
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const SELECTOR_FORM_CHILD = '.dropdown form'
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const SELECTOR_MENU = '.dropdown-menu'
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const SELECTOR_NAVBAR_NAV = '.navbar-nav'
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const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'
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const PLACEMENT_TOP = 'top-start'
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const PLACEMENT_TOPEND = 'top-end'
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const PLACEMENT_BOTTOM = 'bottom-start'
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const PLACEMENT_BOTTOMEND = 'bottom-end'
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const PLACEMENT_RIGHT = 'right-start'
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const PLACEMENT_LEFT = 'left-start'
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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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reference: 'toggle',
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display: 'dynamic',
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popperConfig: null
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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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reference: '(string|element)',
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display: 'string',
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popperConfig: '(null|object)'
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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(CLASS_NAME_DISABLED)) {
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return
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}
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const isActive = $(this._menu).hasClass(CLASS_NAME_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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this.show(true)
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}
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show(usePopper = false) {
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if (this._element.disabled || $(this._element).hasClass(CLASS_NAME_DISABLED) || $(this._menu).hasClass(CLASS_NAME_SHOW)) {
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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 = $.Event(EVENT_SHOW, relatedTarget)
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const parent = Dropdown._getParentFromElement(this._element)
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$(parent).trigger(showEvent)
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if (showEvent.isDefaultPrevented()) {
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return
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}
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// Totally disable Popper for Dropdowns in Navbar
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if (!this._inNavbar && usePopper) {
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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\'s dropdowns require Popper (https://popper.js.org)')
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}
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let referenceElement = this._element
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if (this._config.reference === 'parent') {
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referenceElement = parent
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} else if (Util.isElement(this._config.reference)) {
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referenceElement = this._config.reference
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// Check if it's jQuery element
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if (typeof this._config.reference.jquery !== 'undefined') {
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referenceElement = this._config.reference[0]
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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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$(parent).addClass(CLASS_NAME_POSITION_STATIC)
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}
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this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig())
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}
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// If this is a touch-enabled device we add extra
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// empty mouseover listeners to the body's immediate children;
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// only needed because of broken event delegation on iOS
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// https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
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if ('ontouchstart' in document.documentElement &&
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$(parent).closest(SELECTOR_NAVBAR_NAV).length === 0) {
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$(document.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(CLASS_NAME_SHOW)
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$(parent)
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.toggleClass(CLASS_NAME_SHOW)
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.trigger($.Event(EVENT_SHOWN, relatedTarget))
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}
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hide() {
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if (this._element.disabled || $(this._element).hasClass(CLASS_NAME_DISABLED) || !$(this._menu).hasClass(CLASS_NAME_SHOW)) {
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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 hideEvent = $.Event(EVENT_HIDE, relatedTarget)
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const parent = Dropdown._getParentFromElement(this._element)
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$(parent).trigger(hideEvent)
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if (hideEvent.isDefaultPrevented()) {
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return
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}
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if (this._popper) {
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this._popper.destroy()
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}
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$(this._menu).toggleClass(CLASS_NAME_SHOW)
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$(parent)
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.toggleClass(CLASS_NAME_SHOW)
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.trigger($.Event(EVENT_HIDDEN, relatedTarget))
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}
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dispose() {
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$.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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if (parent) {
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this._menu = parent.querySelector(SELECTOR_MENU)
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}
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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 = $(this._element.parentNode)
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let placement = PLACEMENT_BOTTOM
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// Handle dropup
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if ($parentDropdown.hasClass(CLASS_NAME_DROPUP)) {
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placement = $(this._menu).hasClass(CLASS_NAME_MENURIGHT) ?
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PLACEMENT_TOPEND :
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PLACEMENT_TOP
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} else if ($parentDropdown.hasClass(CLASS_NAME_DROPRIGHT)) {
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placement = PLACEMENT_RIGHT
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} else if ($parentDropdown.hasClass(CLASS_NAME_DROPLEFT)) {
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placement = PLACEMENT_LEFT
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} else if ($(this._menu).hasClass(CLASS_NAME_MENURIGHT)) {
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placement = PLACEMENT_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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_getOffset() {
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const offset = {}
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if (typeof this._config.offset === 'function') {
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offset.fn = data => {
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data.offsets = {
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...data.offsets,
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...(this._config.offset(data.offsets, this._element) || {})
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}
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return data
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}
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} else {
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offset.offset = this._config.offset
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}
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return offset
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}
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_getPopperConfig() {
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const popperConfig = {
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placement: this._getPlacement(),
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modifiers: {
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offset: this._getOffset(),
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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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// Disable Popper if we have a static display
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if (this._config.display === 'static') {
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popperConfig.modifiers.applyStyle = {
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enabled: false
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}
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}
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return {
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...popperConfig,
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...this._config.popperConfig
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}
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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 = [].slice.call(document.querySelectorAll(SELECTOR_DATA_TOGGLE))
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for (let i = 0, len = toggles.length; i < len; i++) {
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const parent = Dropdown._getParentFromElement(toggles[i])
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const context = $(toggles[i]).data(DATA_KEY)
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const relatedTarget = {
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relatedTarget: toggles[i]
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}
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if (event && event.type === 'click') {
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relatedTarget.clickEvent = event
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}
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if (!context) {
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continue
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}
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const dropdownMenu = context._menu
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if (!$(parent).hasClass(CLASS_NAME_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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$(document.body).children().off('mouseover', null, $.noop)
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}
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toggles[i].setAttribute('aria-expanded', 'false')
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if (context._popper) {
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context._popper.destroy()
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}
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$(dropdownMenu).removeClass(CLASS_NAME_SHOW)
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$(parent)
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.removeClass(CLASS_NAME_SHOW)
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.trigger($.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 = document.querySelector(selector)
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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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if (this.disabled || $(this).hasClass(CLASS_NAME_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 = $(parent).hasClass(CLASS_NAME_SHOW)
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if (!isActive && event.which === ESCAPE_KEYCODE) {
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return
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}
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event.preventDefault()
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event.stopPropagation()
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if (!isActive || (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
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if (event.which === ESCAPE_KEYCODE) {
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$(parent.querySelector(SELECTOR_DATA_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 = [].slice.call(parent.querySelectorAll(SELECTOR_VISIBLE_ITEMS))
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.filter(item => $(item).is(':visible'))
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if (items.length === 0) {
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return
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}
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let index = items.indexOf(event.target)
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if (event.which === ARROW_UP_KEYCODE && index > 0) { // Up
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index--
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}
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if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // Down
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index++
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}
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if (index < 0) {
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index = 0
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}
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items[index].focus()
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}
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}
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/**
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* ------------------------------------------------------------------------
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* Data Api implementation
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* ------------------------------------------------------------------------
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*/
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$(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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$.fn[NAME].noConflict = () => {
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$.fn[NAME] = JQUERY_NO_CONFLICT
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return Dropdown._jQueryInterface
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}
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export default Dropdown
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