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+import $ from 'jquery'
+import Util from './util'
+
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.1.3): carousel.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const Carousel = (($) => {
+ /**
+ * ------------------------------------------------------------------------
+ * Constants
+ * ------------------------------------------------------------------------
+ */
+
+ const NAME = 'carousel'
+ const VERSION = '4.1.3'
+ const DATA_KEY = 'bs.carousel'
+ const EVENT_KEY = `.${DATA_KEY}`
+ const DATA_API_KEY = '.data-api'
+ const JQUERY_NO_CONFLICT = $.fn[NAME]
+ const ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key
+ const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key
+ const TOUCHEVENT_COMPAT_WAIT = 500 // Time for mouse compat events to fire after touch
+
+ const Default = {
+ interval : 5000,
+ keyboard : true,
+ slide : false,
+ pause : 'hover',
+ wrap : true
+ }
+
+ const DefaultType = {
+ interval : '(number|boolean)',
+ keyboard : 'boolean',
+ slide : '(boolean|string)',
+ pause : '(string|boolean)',
+ wrap : 'boolean'
+ }
+
+ const Direction = {
+ NEXT : 'next',
+ PREV : 'prev',
+ LEFT : 'left',
+ RIGHT : 'right'
+ }
+
+ const Event = {
+ SLIDE : `slide${EVENT_KEY}`,
+ SLID : `slid${EVENT_KEY}`,
+ KEYDOWN : `keydown${EVENT_KEY}`,
+ MOUSEENTER : `mouseenter${EVENT_KEY}`,
+ MOUSELEAVE : `mouseleave${EVENT_KEY}`,
+ TOUCHEND : `touchend${EVENT_KEY}`,
+ LOAD_DATA_API : `load${EVENT_KEY}${DATA_API_KEY}`,
+ CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`
+ }
+
+ const ClassName = {
+ CAROUSEL : 'carousel',
+ ACTIVE : 'active',
+ SLIDE : 'slide',
+ RIGHT : 'carousel-item-right',
+ LEFT : 'carousel-item-left',
+ NEXT : 'carousel-item-next',
+ PREV : 'carousel-item-prev',
+ ITEM : 'carousel-item'
+ }
+
+ const Selector = {
+ ACTIVE : '.active',
+ ACTIVE_ITEM : '.active.carousel-item',
+ ITEM : '.carousel-item',
+ NEXT_PREV : '.carousel-item-next, .carousel-item-prev',
+ INDICATORS : '.carousel-indicators',
+ DATA_SLIDE : '[data-slide], [data-slide-to]',
+ DATA_RIDE : '[data-ride="carousel"]'
+ }
+
+ /**
+ * ------------------------------------------------------------------------
+ * Class Definition
+ * ------------------------------------------------------------------------
+ */
+
+ class Carousel {
+ constructor(element, config) {
+ this._items = null
+ this._interval = null
+ this._activeElement = null
+
+ this._isPaused = false
+ this._isSliding = false
+
+ this.touchTimeout = null
+
+ this._config = this._getConfig(config)
+ this._element = $(element)[0]
+ this._indicatorsElement = this._element.querySelector(Selector.INDICATORS)
+
+ this._addEventListeners()
+ }
+
+ // Getters
+
+ static get VERSION() {
+ return VERSION
+ }
+
+ static get Default() {
+ return Default
+ }
+
+ // Public
+
+ next() {
+ if (!this._isSliding) {
+ this._slide(Direction.NEXT)
+ }
+ }
+
+ nextWhenVisible() {
+ // Don't call next when the page isn't visible
+ // or the carousel or its parent isn't visible
+ if (!document.hidden &&
+ ($(this._element).is(':visible') && $(this._element).css('visibility') !== 'hidden')) {
+ this.next()
+ }
+ }
+
+ prev() {
+ if (!this._isSliding) {
+ this._slide(Direction.PREV)
+ }
+ }
+
+ pause(event) {
+ if (!event) {
+ this._isPaused = true
+ }
+
+ if (this._element.querySelector(Selector.NEXT_PREV)) {
+ Util.triggerTransitionEnd(this._element)
+ this.cycle(true)
+ }
+
+ clearInterval(this._interval)
+ this._interval = null
+ }
+
+ cycle(event) {
+ if (!event) {
+ this._isPaused = false
+ }
+
+ if (this._interval) {
+ clearInterval(this._interval)
+ this._interval = null
+ }
+
+ if (this._config.interval && !this._isPaused) {
+ this._interval = setInterval(
+ (document.visibilityState ? this.nextWhenVisible : this.next).bind(this),
+ this._config.interval
+ )
+ }
+ }
+
+ to(index) {
+ this._activeElement = this._element.querySelector(Selector.ACTIVE_ITEM)
+
+ const activeIndex = this._getItemIndex(this._activeElement)
+
+ if (index > this._items.length - 1 || index < 0) {
+ return
+ }
+
+ if (this._isSliding) {
+ $(this._element).one(Event.SLID, () => this.to(index))
+ return
+ }
+
+ if (activeIndex === index) {
+ this.pause()
+ this.cycle()
+ return
+ }
+
+ const direction = index > activeIndex
+ ? Direction.NEXT
+ : Direction.PREV
+
+ this._slide(direction, this._items[index])
+ }
+
+ dispose() {
+ $(this._element).off(EVENT_KEY)
+ $.removeData(this._element, DATA_KEY)
+
+ this._items = null
+ this._config = null
+ this._element = null
+ this._interval = null
+ this._isPaused = null
+ this._isSliding = null
+ this._activeElement = null
+ this._indicatorsElement = null
+ }
+
+ // Private
+
+ _getConfig(config) {
+ config = {
+ ...Default,
+ ...config
+ }
+ Util.typeCheckConfig(NAME, config, DefaultType)
+ return config
+ }
+
+ _addEventListeners() {
+ if (this._config.keyboard) {
+ $(this._element)
+ .on(Event.KEYDOWN, (event) => this._keydown(event))
+ }
+
+ if (this._config.pause === 'hover') {
+ $(this._element)
+ .on(Event.MOUSEENTER, (event) => this.pause(event))
+ .on(Event.MOUSELEAVE, (event) => this.cycle(event))
+ if ('ontouchstart' in document.documentElement) {
+ // If it's a touch-enabled device, mouseenter/leave are fired as
+ // part of the mouse compatibility events on first tap - the carousel
+ // would stop cycling until user tapped out of it;
+ // here, we listen for touchend, explicitly pause the carousel
+ // (as if it's the second time we tap on it, mouseenter compat event
+ // is NOT fired) and after a timeout (to allow for mouse compatibility
+ // events to fire) we explicitly restart cycling
+ $(this._element).on(Event.TOUCHEND, () => {
+ this.pause()
+ if (this.touchTimeout) {
+ clearTimeout(this.touchTimeout)
+ }
+ this.touchTimeout = setTimeout((event) => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval)
+ })
+ }
+ }
+ }
+
+ _keydown(event) {
+ if (/input|textarea/i.test(event.target.tagName)) {
+ return
+ }
+
+ switch (event.which) {
+ case ARROW_LEFT_KEYCODE:
+ event.preventDefault()
+ this.prev()
+ break
+ case ARROW_RIGHT_KEYCODE:
+ event.preventDefault()
+ this.next()
+ break
+ default:
+ }
+ }
+
+ _getItemIndex(element) {
+ this._items = element && element.parentNode
+ ? [].slice.call(element.parentNode.querySelectorAll(Selector.ITEM))
+ : []
+ return this._items.indexOf(element)
+ }
+
+ _getItemByDirection(direction, activeElement) {
+ const isNextDirection = direction === Direction.NEXT
+ const isPrevDirection = direction === Direction.PREV
+ const activeIndex = this._getItemIndex(activeElement)
+ const lastItemIndex = this._items.length - 1
+ const isGoingToWrap = isPrevDirection && activeIndex === 0 ||
+ isNextDirection && activeIndex === lastItemIndex
+
+ if (isGoingToWrap && !this._config.wrap) {
+ return activeElement
+ }
+
+ const delta = direction === Direction.PREV ? -1 : 1
+ const itemIndex = (activeIndex + delta) % this._items.length
+
+ return itemIndex === -1
+ ? this._items[this._items.length - 1] : this._items[itemIndex]
+ }
+
+ _triggerSlideEvent(relatedTarget, eventDirectionName) {
+ const targetIndex = this._getItemIndex(relatedTarget)
+ const fromIndex = this._getItemIndex(this._element.querySelector(Selector.ACTIVE_ITEM))
+ const slideEvent = $.Event(Event.SLIDE, {
+ relatedTarget,
+ direction: eventDirectionName,
+ from: fromIndex,
+ to: targetIndex
+ })
+
+ $(this._element).trigger(slideEvent)
+
+ return slideEvent
+ }
+
+ _setActiveIndicatorElement(element) {
+ if (this._indicatorsElement) {
+ const indicators = [].slice.call(this._indicatorsElement.querySelectorAll(Selector.ACTIVE))
+ $(indicators)
+ .removeClass(ClassName.ACTIVE)
+
+ const nextIndicator = this._indicatorsElement.children[
+ this._getItemIndex(element)
+ ]
+
+ if (nextIndicator) {
+ $(nextIndicator).addClass(ClassName.ACTIVE)
+ }
+ }
+ }
+
+ _slide(direction, element) {
+ const activeElement = this._element.querySelector(Selector.ACTIVE_ITEM)
+ const activeElementIndex = this._getItemIndex(activeElement)
+ const nextElement = element || activeElement &&
+ this._getItemByDirection(direction, activeElement)
+ const nextElementIndex = this._getItemIndex(nextElement)
+ const isCycling = Boolean(this._interval)
+
+ let directionalClassName
+ let orderClassName
+ let eventDirectionName
+
+ if (direction === Direction.NEXT) {
+ directionalClassName = ClassName.LEFT
+ orderClassName = ClassName.NEXT
+ eventDirectionName = Direction.LEFT
+ } else {
+ directionalClassName = ClassName.RIGHT
+ orderClassName = ClassName.PREV
+ eventDirectionName = Direction.RIGHT
+ }
+
+ if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) {
+ this._isSliding = false
+ return
+ }
+
+ const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName)
+ if (slideEvent.isDefaultPrevented()) {
+ return
+ }
+
+ if (!activeElement || !nextElement) {
+ // Some weirdness is happening, so we bail
+ return
+ }
+
+ this._isSliding = true
+
+ if (isCycling) {
+ this.pause()
+ }
+
+ this._setActiveIndicatorElement(nextElement)
+
+ const slidEvent = $.Event(Event.SLID, {
+ relatedTarget: nextElement,
+ direction: eventDirectionName,
+ from: activeElementIndex,
+ to: nextElementIndex
+ })
+
+ if ($(this._element).hasClass(ClassName.SLIDE)) {
+ $(nextElement).addClass(orderClassName)
+
+ Util.reflow(nextElement)
+
+ $(activeElement).addClass(directionalClassName)
+ $(nextElement).addClass(directionalClassName)
+
+ const transitionDuration = Util.getTransitionDurationFromElement(activeElement)
+
+ $(activeElement)
+ .one(Util.TRANSITION_END, () => {
+ $(nextElement)
+ .removeClass(`${directionalClassName} ${orderClassName}`)
+ .addClass(ClassName.ACTIVE)
+
+ $(activeElement).removeClass(`${ClassName.ACTIVE} ${orderClassName} ${directionalClassName}`)
+
+ this._isSliding = false
+
+ setTimeout(() => $(this._element).trigger(slidEvent), 0)
+ })
+ .emulateTransitionEnd(transitionDuration)
+ } else {
+ $(activeElement).removeClass(ClassName.ACTIVE)
+ $(nextElement).addClass(ClassName.ACTIVE)
+
+ this._isSliding = false
+ $(this._element).trigger(slidEvent)
+ }
+
+ if (isCycling) {
+ this.cycle()
+ }
+ }
+
+ // Static
+
+ static _jQueryInterface(config) {
+ return this.each(function () {
+ let data = $(this).data(DATA_KEY)
+ let _config = {
+ ...Default,
+ ...$(this).data()
+ }
+
+ if (typeof config === 'object') {
+ _config = {
+ ..._config,
+ ...config
+ }
+ }
+
+ const action = typeof config === 'string' ? config : _config.slide
+
+ if (!data) {
+ data = new Carousel(this, _config)
+ $(this).data(DATA_KEY, data)
+ }
+
+ if (typeof config === 'number') {
+ data.to(config)
+ } else if (typeof action === 'string') {
+ if (typeof data[action] === 'undefined') {
+ throw new TypeError(`No method named "${action}"`)
+ }
+ data[action]()
+ } else if (_config.interval) {
+ data.pause()
+ data.cycle()
+ }
+ })
+ }
+
+ static _dataApiClickHandler(event) {
+ const selector = Util.getSelectorFromElement(this)
+
+ if (!selector) {
+ return
+ }
+
+ const target = $(selector)[0]
+
+ if (!target || !$(target).hasClass(ClassName.CAROUSEL)) {
+ return
+ }
+
+ const config = {
+ ...$(target).data(),
+ ...$(this).data()
+ }
+ const slideIndex = this.getAttribute('data-slide-to')
+
+ if (slideIndex) {
+ config.interval = false
+ }
+
+ Carousel._jQueryInterface.call($(target), config)
+
+ if (slideIndex) {
+ $(target).data(DATA_KEY).to(slideIndex)
+ }
+
+ 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 = function () {
+ $.fn[NAME] = JQUERY_NO_CONFLICT
+ return Carousel._jQueryInterface
+ }
+
+ return Carousel
+})($)
+
+export default Carousel