614 lines
16 KiB
JavaScript
614 lines
16 KiB
JavaScript
/**
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* --------------------------------------------------------------------------
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* Bootstrap (v4.6.0): carousel.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 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 = 'carousel'
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const VERSION = '4.6.0'
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const DATA_KEY = 'bs.carousel'
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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 ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key
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const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key
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const TOUCHEVENT_COMPAT_WAIT = 500 // Time for mouse compat events to fire after touch
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const SWIPE_THRESHOLD = 40
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const Default = {
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interval: 5000,
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keyboard: true,
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slide: false,
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pause: 'hover',
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wrap: true,
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touch: true
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}
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const DefaultType = {
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interval: '(number|boolean)',
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keyboard: 'boolean',
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slide: '(boolean|string)',
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pause: '(string|boolean)',
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wrap: 'boolean',
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touch: 'boolean'
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}
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const DIRECTION_NEXT = 'next'
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const DIRECTION_PREV = 'prev'
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const DIRECTION_LEFT = 'left'
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const DIRECTION_RIGHT = 'right'
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const EVENT_SLIDE = `slide${EVENT_KEY}`
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const EVENT_SLID = `slid${EVENT_KEY}`
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const EVENT_KEYDOWN = `keydown${EVENT_KEY}`
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const EVENT_MOUSEENTER = `mouseenter${EVENT_KEY}`
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const EVENT_MOUSELEAVE = `mouseleave${EVENT_KEY}`
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const EVENT_TOUCHSTART = `touchstart${EVENT_KEY}`
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const EVENT_TOUCHMOVE = `touchmove${EVENT_KEY}`
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const EVENT_TOUCHEND = `touchend${EVENT_KEY}`
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const EVENT_POINTERDOWN = `pointerdown${EVENT_KEY}`
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const EVENT_POINTERUP = `pointerup${EVENT_KEY}`
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const EVENT_DRAG_START = `dragstart${EVENT_KEY}`
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const EVENT_LOAD_DATA_API = `load${EVENT_KEY}${DATA_API_KEY}`
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const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
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const CLASS_NAME_CAROUSEL = 'carousel'
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const CLASS_NAME_ACTIVE = 'active'
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const CLASS_NAME_SLIDE = 'slide'
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const CLASS_NAME_RIGHT = 'carousel-item-right'
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const CLASS_NAME_LEFT = 'carousel-item-left'
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const CLASS_NAME_NEXT = 'carousel-item-next'
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const CLASS_NAME_PREV = 'carousel-item-prev'
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const CLASS_NAME_POINTER_EVENT = 'pointer-event'
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const SELECTOR_ACTIVE = '.active'
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const SELECTOR_ACTIVE_ITEM = '.active.carousel-item'
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const SELECTOR_ITEM = '.carousel-item'
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const SELECTOR_ITEM_IMG = '.carousel-item img'
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const SELECTOR_NEXT_PREV = '.carousel-item-next, .carousel-item-prev'
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const SELECTOR_INDICATORS = '.carousel-indicators'
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const SELECTOR_DATA_SLIDE = '[data-slide], [data-slide-to]'
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const SELECTOR_DATA_RIDE = '[data-ride="carousel"]'
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const PointerType = {
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TOUCH: 'touch',
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PEN: 'pen'
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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 Carousel {
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constructor(element, config) {
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this._items = null
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this._interval = null
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this._activeElement = null
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this._isPaused = false
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this._isSliding = false
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this.touchTimeout = null
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this.touchStartX = 0
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this.touchDeltaX = 0
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this._config = this._getConfig(config)
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this._element = element
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this._indicatorsElement = this._element.querySelector(SELECTOR_INDICATORS)
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this._touchSupported = 'ontouchstart' in document.documentElement || navigator.maxTouchPoints > 0
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this._pointerEvent = Boolean(window.PointerEvent || window.MSPointerEvent)
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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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// Public
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next() {
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if (!this._isSliding) {
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this._slide(DIRECTION_NEXT)
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}
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}
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nextWhenVisible() {
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const $element = $(this._element)
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// Don't call next when the page isn't visible
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// or the carousel or its parent isn't visible
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if (!document.hidden &&
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($element.is(':visible') && $element.css('visibility') !== 'hidden')) {
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this.next()
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}
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}
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prev() {
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if (!this._isSliding) {
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this._slide(DIRECTION_PREV)
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}
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}
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pause(event) {
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if (!event) {
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this._isPaused = true
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}
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if (this._element.querySelector(SELECTOR_NEXT_PREV)) {
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Util.triggerTransitionEnd(this._element)
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this.cycle(true)
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}
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clearInterval(this._interval)
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this._interval = null
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}
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cycle(event) {
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if (!event) {
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this._isPaused = false
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}
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if (this._interval) {
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clearInterval(this._interval)
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this._interval = null
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}
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if (this._config.interval && !this._isPaused) {
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this._updateInterval()
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this._interval = setInterval(
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(document.visibilityState ? this.nextWhenVisible : this.next).bind(this),
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this._config.interval
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)
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}
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}
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to(index) {
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this._activeElement = this._element.querySelector(SELECTOR_ACTIVE_ITEM)
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const activeIndex = this._getItemIndex(this._activeElement)
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if (index > this._items.length - 1 || index < 0) {
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return
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}
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if (this._isSliding) {
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$(this._element).one(EVENT_SLID, () => this.to(index))
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return
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}
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if (activeIndex === index) {
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this.pause()
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this.cycle()
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return
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}
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const direction = index > activeIndex ?
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DIRECTION_NEXT :
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DIRECTION_PREV
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this._slide(direction, this._items[index])
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}
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dispose() {
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$(this._element).off(EVENT_KEY)
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$.removeData(this._element, DATA_KEY)
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this._items = null
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this._config = null
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this._element = null
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this._interval = null
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this._isPaused = null
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this._isSliding = null
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this._activeElement = null
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this._indicatorsElement = null
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}
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// Private
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_getConfig(config) {
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config = {
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...Default,
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...config
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}
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Util.typeCheckConfig(NAME, config, DefaultType)
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return config
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}
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_handleSwipe() {
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const absDeltax = Math.abs(this.touchDeltaX)
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if (absDeltax <= SWIPE_THRESHOLD) {
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return
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}
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const direction = absDeltax / this.touchDeltaX
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this.touchDeltaX = 0
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// swipe left
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if (direction > 0) {
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this.prev()
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}
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// swipe right
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if (direction < 0) {
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this.next()
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}
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}
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_addEventListeners() {
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if (this._config.keyboard) {
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$(this._element).on(EVENT_KEYDOWN, event => this._keydown(event))
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}
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if (this._config.pause === 'hover') {
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$(this._element)
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.on(EVENT_MOUSEENTER, event => this.pause(event))
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.on(EVENT_MOUSELEAVE, event => this.cycle(event))
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}
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if (this._config.touch) {
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this._addTouchEventListeners()
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}
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}
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_addTouchEventListeners() {
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if (!this._touchSupported) {
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return
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}
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const start = event => {
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if (this._pointerEvent && PointerType[event.originalEvent.pointerType.toUpperCase()]) {
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this.touchStartX = event.originalEvent.clientX
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} else if (!this._pointerEvent) {
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this.touchStartX = event.originalEvent.touches[0].clientX
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}
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}
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const move = event => {
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// ensure swiping with one touch and not pinching
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if (event.originalEvent.touches && event.originalEvent.touches.length > 1) {
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this.touchDeltaX = 0
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} else {
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this.touchDeltaX = event.originalEvent.touches[0].clientX - this.touchStartX
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}
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}
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const end = event => {
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if (this._pointerEvent && PointerType[event.originalEvent.pointerType.toUpperCase()]) {
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this.touchDeltaX = event.originalEvent.clientX - this.touchStartX
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}
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this._handleSwipe()
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if (this._config.pause === 'hover') {
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// If it's a touch-enabled device, mouseenter/leave are fired as
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// part of the mouse compatibility events on first tap - the carousel
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// would stop cycling until user tapped out of it;
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// here, we listen for touchend, explicitly pause the carousel
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// (as if it's the second time we tap on it, mouseenter compat event
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// is NOT fired) and after a timeout (to allow for mouse compatibility
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// events to fire) we explicitly restart cycling
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this.pause()
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if (this.touchTimeout) {
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clearTimeout(this.touchTimeout)
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}
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this.touchTimeout = setTimeout(event => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval)
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}
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}
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$(this._element.querySelectorAll(SELECTOR_ITEM_IMG))
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.on(EVENT_DRAG_START, e => e.preventDefault())
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if (this._pointerEvent) {
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$(this._element).on(EVENT_POINTERDOWN, event => start(event))
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$(this._element).on(EVENT_POINTERUP, event => end(event))
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this._element.classList.add(CLASS_NAME_POINTER_EVENT)
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} else {
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$(this._element).on(EVENT_TOUCHSTART, event => start(event))
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$(this._element).on(EVENT_TOUCHMOVE, event => move(event))
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$(this._element).on(EVENT_TOUCHEND, event => end(event))
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}
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}
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_keydown(event) {
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if (/input|textarea/i.test(event.target.tagName)) {
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return
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}
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switch (event.which) {
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case ARROW_LEFT_KEYCODE:
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event.preventDefault()
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this.prev()
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break
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case ARROW_RIGHT_KEYCODE:
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event.preventDefault()
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this.next()
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break
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default:
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}
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}
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_getItemIndex(element) {
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this._items = element && element.parentNode ?
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[].slice.call(element.parentNode.querySelectorAll(SELECTOR_ITEM)) :
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[]
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return this._items.indexOf(element)
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}
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_getItemByDirection(direction, activeElement) {
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const isNextDirection = direction === DIRECTION_NEXT
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const isPrevDirection = direction === DIRECTION_PREV
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const activeIndex = this._getItemIndex(activeElement)
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const lastItemIndex = this._items.length - 1
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const isGoingToWrap = isPrevDirection && activeIndex === 0 ||
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isNextDirection && activeIndex === lastItemIndex
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if (isGoingToWrap && !this._config.wrap) {
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return activeElement
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}
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const delta = direction === DIRECTION_PREV ? -1 : 1
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const itemIndex = (activeIndex + delta) % this._items.length
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return itemIndex === -1 ?
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this._items[this._items.length - 1] : this._items[itemIndex]
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}
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_triggerSlideEvent(relatedTarget, eventDirectionName) {
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const targetIndex = this._getItemIndex(relatedTarget)
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const fromIndex = this._getItemIndex(this._element.querySelector(SELECTOR_ACTIVE_ITEM))
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const slideEvent = $.Event(EVENT_SLIDE, {
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relatedTarget,
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direction: eventDirectionName,
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from: fromIndex,
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to: targetIndex
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})
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$(this._element).trigger(slideEvent)
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return slideEvent
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}
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_setActiveIndicatorElement(element) {
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if (this._indicatorsElement) {
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const indicators = [].slice.call(this._indicatorsElement.querySelectorAll(SELECTOR_ACTIVE))
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$(indicators).removeClass(CLASS_NAME_ACTIVE)
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const nextIndicator = this._indicatorsElement.children[
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this._getItemIndex(element)
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]
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if (nextIndicator) {
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$(nextIndicator).addClass(CLASS_NAME_ACTIVE)
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}
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}
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}
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_updateInterval() {
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const element = this._activeElement || this._element.querySelector(SELECTOR_ACTIVE_ITEM)
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if (!element) {
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return
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}
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const elementInterval = parseInt(element.getAttribute('data-interval'), 10)
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if (elementInterval) {
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this._config.defaultInterval = this._config.defaultInterval || this._config.interval
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this._config.interval = elementInterval
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} else {
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this._config.interval = this._config.defaultInterval || this._config.interval
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}
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}
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_slide(direction, element) {
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const activeElement = this._element.querySelector(SELECTOR_ACTIVE_ITEM)
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const activeElementIndex = this._getItemIndex(activeElement)
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const nextElement = element || activeElement &&
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this._getItemByDirection(direction, activeElement)
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const nextElementIndex = this._getItemIndex(nextElement)
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const isCycling = Boolean(this._interval)
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let directionalClassName
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let orderClassName
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let eventDirectionName
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if (direction === DIRECTION_NEXT) {
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directionalClassName = CLASS_NAME_LEFT
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orderClassName = CLASS_NAME_NEXT
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eventDirectionName = DIRECTION_LEFT
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} else {
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directionalClassName = CLASS_NAME_RIGHT
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orderClassName = CLASS_NAME_PREV
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eventDirectionName = DIRECTION_RIGHT
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}
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if (nextElement && $(nextElement).hasClass(CLASS_NAME_ACTIVE)) {
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this._isSliding = false
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return
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}
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const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName)
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if (slideEvent.isDefaultPrevented()) {
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return
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}
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if (!activeElement || !nextElement) {
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// Some weirdness is happening, so we bail
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return
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}
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this._isSliding = true
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if (isCycling) {
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this.pause()
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}
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this._setActiveIndicatorElement(nextElement)
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this._activeElement = nextElement
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const slidEvent = $.Event(EVENT_SLID, {
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relatedTarget: nextElement,
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direction: eventDirectionName,
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from: activeElementIndex,
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to: nextElementIndex
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})
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if ($(this._element).hasClass(CLASS_NAME_SLIDE)) {
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$(nextElement).addClass(orderClassName)
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Util.reflow(nextElement)
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$(activeElement).addClass(directionalClassName)
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$(nextElement).addClass(directionalClassName)
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const transitionDuration = Util.getTransitionDurationFromElement(activeElement)
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$(activeElement)
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.one(Util.TRANSITION_END, () => {
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$(nextElement)
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.removeClass(`${directionalClassName} ${orderClassName}`)
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.addClass(CLASS_NAME_ACTIVE)
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$(activeElement).removeClass(`${CLASS_NAME_ACTIVE} ${orderClassName} ${directionalClassName}`)
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this._isSliding = false
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setTimeout(() => $(this._element).trigger(slidEvent), 0)
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})
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.emulateTransitionEnd(transitionDuration)
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} else {
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$(activeElement).removeClass(CLASS_NAME_ACTIVE)
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$(nextElement).addClass(CLASS_NAME_ACTIVE)
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this._isSliding = false
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$(this._element).trigger(slidEvent)
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}
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if (isCycling) {
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this.cycle()
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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 = $(this).data(DATA_KEY)
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let _config = {
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...Default,
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...$(this).data()
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}
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if (typeof config === 'object') {
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_config = {
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..._config,
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...config
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}
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}
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const action = typeof config === 'string' ? config : _config.slide
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if (!data) {
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data = new Carousel(this, _config)
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$(this).data(DATA_KEY, data)
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}
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if (typeof config === 'number') {
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data.to(config)
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} else if (typeof action === 'string') {
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if (typeof data[action] === 'undefined') {
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throw new TypeError(`No method named "${action}"`)
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}
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data[action]()
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} else if (_config.interval && _config.ride) {
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data.pause()
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data.cycle()
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}
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})
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}
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static _dataApiClickHandler(event) {
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const selector = Util.getSelectorFromElement(this)
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if (!selector) {
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return
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}
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const target = $(selector)[0]
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if (!target || !$(target).hasClass(CLASS_NAME_CAROUSEL)) {
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return
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}
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const config = {
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...$(target).data(),
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...$(this).data()
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}
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const slideIndex = this.getAttribute('data-slide-to')
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if (slideIndex) {
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config.interval = false
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}
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Carousel._jQueryInterface.call($(target), config)
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if (slideIndex) {
|
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$(target).data(DATA_KEY).to(slideIndex)
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|
}
|
|
|
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event.preventDefault()
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ------------------------------------------------------------------------
|
|
* Data Api implementation
|
|
* ------------------------------------------------------------------------
|
|
*/
|
|
|
|
$(document).on(EVENT_CLICK_DATA_API, SELECTOR_DATA_SLIDE, Carousel._dataApiClickHandler)
|
|
|
|
$(window).on(EVENT_LOAD_DATA_API, () => {
|
|
const carousels = [].slice.call(document.querySelectorAll(SELECTOR_DATA_RIDE))
|
|
for (let i = 0, len = carousels.length; i < len; i++) {
|
|
const $carousel = $(carousels[i])
|
|
Carousel._jQueryInterface.call($carousel, $carousel.data())
|
|
}
|
|
})
|
|
|
|
/**
|
|
* ------------------------------------------------------------------------
|
|
* jQuery
|
|
* ------------------------------------------------------------------------
|
|
*/
|
|
|
|
$.fn[NAME] = Carousel._jQueryInterface
|
|
$.fn[NAME].Constructor = Carousel
|
|
$.fn[NAME].noConflict = () => {
|
|
$.fn[NAME] = JQUERY_NO_CONFLICT
|
|
return Carousel._jQueryInterface
|
|
}
|
|
|
|
export default Carousel
|