import Util from './util' /** * -------------------------------------------------------------------------- * Bootstrap (v4.0.0-alpha.4): carousel.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */ const Carousel = (($) => { /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ const NAME = 'carousel' const VERSION = '4.0.0-alpha.4' const DATA_KEY = 'bs.carousel' const EVENT_KEY = `.${DATA_KEY}` const DATA_API_KEY = '.data-api' const JQUERY_NO_CONFLICT = $.fn[NAME] const TRANSITION_DURATION = 600 const ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key const Default = { interval : 5000, keyboard : true, slide : false, pause : 'hover', wrap : true } const DefaultType = { interval : '(number|boolean)', keyboard : 'boolean', slide : '(boolean|string)', pause : '(string|boolean)', wrap : 'boolean' } const Direction = { NEXT : 'next', PREVIOUS : 'prev' } const Event = { SLIDE : `slide${EVENT_KEY}`, SLID : `slid${EVENT_KEY}`, KEYDOWN : `keydown${EVENT_KEY}`, MOUSEENTER : `mouseenter${EVENT_KEY}`, MOUSELEAVE : `mouseleave${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 : 'right', LEFT : 'left', ITEM : 'carousel-item' } const Selector = { ACTIVE : '.active', ACTIVE_ITEM : '.active.carousel-item', ITEM : '.carousel-item', NEXT_PREV : '.next, .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._config = this._getConfig(config) this._element = $(element)[0] this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0] this._addEventListeners() } // getters static get VERSION() { return VERSION } static get Default() { return Default } // public next() { if (!this._isSliding) { this._slide(Direction.NEXT) } } nextWhenVisible() { // Don't call next when the page isn't visible if (!document.hidden) { this.next() } } prev() { if (!this._isSliding) { this._slide(Direction.PREVIOUS) } } pause(event) { if (!event) { this._isPaused = true } if ($(this._element).find(Selector.NEXT_PREV)[0] && Util.supportsTransitionEnd()) { 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( $.proxy(document.visibilityState ? this.nextWhenVisible : this.next, this), this._config.interval ) } } to(index) { this._activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0] let 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 } let direction = index > activeIndex ? Direction.NEXT : Direction.PREVIOUS 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 = $.extend({}, Default, config) Util.typeCheckConfig(NAME, config, DefaultType) return config } _addEventListeners() { if (this._config.keyboard) { $(this._element) .on(Event.KEYDOWN, $.proxy(this._keydown, this)) } if (this._config.pause === 'hover' && !('ontouchstart' in document.documentElement)) { $(this._element) .on(Event.MOUSEENTER, $.proxy(this.pause, this)) .on(Event.MOUSELEAVE, $.proxy(this.cycle, this)) } } _keydown(event) { event.preventDefault() if (/input|textarea/i.test(event.target.tagName)) { return } switch (event.which) { case ARROW_LEFT_KEYCODE: this.prev() break case ARROW_RIGHT_KEYCODE: this.next() break default: return } } _getItemIndex(element) { this._items = $.makeArray($(element).parent().find(Selector.ITEM)) return this._items.indexOf(element) } _getItemByDirection(direction, activeElement) { let isNextDirection = direction === Direction.NEXT let isPrevDirection = direction === Direction.PREVIOUS let activeIndex = this._getItemIndex(activeElement) let lastItemIndex = (this._items.length - 1) let isGoingToWrap = (isPrevDirection && activeIndex === 0) || (isNextDirection && activeIndex === lastItemIndex) if (isGoingToWrap && !this._config.wrap) { return activeElement } let delta = direction === Direction.PREVIOUS ? -1 : 1 let itemIndex = (activeIndex + delta) % this._items.length return itemIndex === -1 ? this._items[this._items.length - 1] : this._items[itemIndex] } _triggerSlideEvent(relatedTarget, directionalClassname) { let slideEvent = $.Event(Event.SLIDE, { relatedTarget, direction: directionalClassname }) $(this._element).trigger(slideEvent) return slideEvent } _setActiveIndicatorElement(element) { if (this._indicatorsElement) { $(this._indicatorsElement) .find(Selector.ACTIVE) .removeClass(ClassName.ACTIVE) let nextIndicator = this._indicatorsElement.children[ this._getItemIndex(element) ] if (nextIndicator) { $(nextIndicator).addClass(ClassName.ACTIVE) } } } _slide(direction, element) { let activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0] let nextElement = element || activeElement && this._getItemByDirection(direction, activeElement) let isCycling = Boolean(this._interval) let directionalClassName = direction === Direction.NEXT ? ClassName.LEFT : ClassName.RIGHT if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) { this._isSliding = false return } let slideEvent = this._triggerSlideEvent(nextElement, directionalClassName) 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) let slidEvent = $.Event(Event.SLID, { relatedTarget: nextElement, direction: directionalClassName }) if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.SLIDE)) { $(nextElement).addClass(direction) Util.reflow(nextElement) $(activeElement).addClass(directionalClassName) $(nextElement).addClass(directionalClassName) $(activeElement) .one(Util.TRANSITION_END, () => { $(nextElement) .removeClass(directionalClassName + ' ' + direction) .addClass(ClassName.ACTIVE) $(activeElement).removeClass(ClassName.ACTIVE + ' ' + direction + ' ' + directionalClassName) this._isSliding = false setTimeout(() => $(this._element).trigger(slidEvent), 0) }) .emulateTransitionEnd(TRANSITION_DURATION) } 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 = $.extend({}, Default, $(this).data()) if (typeof config === 'object') { $.extend(_config, config) } let action = typeof config === 'string' ? config : _config.slide if (!data) { data = new Carousel(this, _config) $(this).data(DATA_KEY, data) } if (typeof config === 'number') { data.to(config) } else if (typeof action === 'string') { if (data[action] === undefined) { throw new Error(`No method named "${action}"`) } data[action]() } else if (_config.interval) { data.pause() data.cycle() } }) } static _dataApiClickHandler(event) { let selector = Util.getSelectorFromElement(this) if (!selector) { return } let target = $(selector)[0] if (!target || !$(target).hasClass(ClassName.CAROUSEL)) { return } let config = $.extend({}, $(target).data(), $(this).data()) let slideIndex = this.getAttribute('data-slide-to') if (slideIndex) { config.interval = false } Carousel._jQueryInterface.call($(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, () => { $(Selector.DATA_RIDE).each(function () { let $carousel = $(this) Carousel._jQueryInterface.call($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 })(jQuery) export default Carousel