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28 KiB
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Util from './util'\n\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v4.0.0-beta): carousel.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nconst Carousel = (($) => {\n\n\n /**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\n const NAME = 'carousel'\n const VERSION = '4.0.0-beta'\n const DATA_KEY = 'bs.carousel'\n const EVENT_KEY = `.${DATA_KEY}`\n const DATA_API_KEY = '.data-api'\n const JQUERY_NO_CONFLICT = $.fn[NAME]\n const TRANSITION_DURATION = 600\n const ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key\n const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key\n const TOUCHEVENT_COMPAT_WAIT = 500 // Time for mouse compat events to fire after touch\n\n const Default = {\n interval : 5000,\n keyboard : true,\n slide : false,\n pause : 'hover',\n wrap : true\n }\n\n const DefaultType = {\n interval : '(number|boolean)',\n keyboard : 'boolean',\n slide : '(boolean|string)',\n pause : '(string|boolean)',\n wrap : 'boolean'\n }\n\n const Direction = {\n NEXT : 'next',\n PREV : 'prev',\n LEFT : 'left',\n RIGHT : 'right'\n }\n\n const Event = {\n SLIDE : `slide${EVENT_KEY}`,\n SLID : `slid${EVENT_KEY}`,\n KEYDOWN : `keydown${EVENT_KEY}`,\n MOUSEENTER : `mouseenter${EVENT_KEY}`,\n MOUSELEAVE : `mouseleave${EVENT_KEY}`,\n TOUCHEND : `touchend${EVENT_KEY}`,\n LOAD_DATA_API : `load${EVENT_KEY}${DATA_API_KEY}`,\n CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`\n }\n\n const ClassName = {\n CAROUSEL : 'carousel',\n ACTIVE : 'active',\n SLIDE : 'slide',\n RIGHT : 'carousel-item-right',\n LEFT : 'carousel-item-left',\n NEXT : 'carousel-item-next',\n PREV : 'carousel-item-prev',\n ITEM : 'carousel-item'\n }\n\n const Selector = {\n ACTIVE : '.active',\n ACTIVE_ITEM : '.active.carousel-item',\n ITEM : '.carousel-item',\n NEXT_PREV : '.carousel-item-next, .carousel-item-prev',\n INDICATORS : '.carousel-indicators',\n DATA_SLIDE : '[data-slide], [data-slide-to]',\n DATA_RIDE : '[data-ride=\"carousel\"]'\n }\n\n\n /**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\n class Carousel {\n\n constructor(element, config) {\n this._items = null\n this._interval = null\n this._activeElement = null\n\n this._isPaused = false\n this._isSliding = false\n\n this.touchTimeout = null\n\n this._config = this._getConfig(config)\n this._element = $(element)[0]\n this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0]\n\n this._addEventListeners()\n }\n\n\n // getters\n\n static get VERSION() {\n return VERSION\n }\n\n static get Default() {\n return Default\n }\n\n\n // public\n\n next() {\n if (!this._isSliding) {\n this._slide(Direction.NEXT)\n }\n }\n\n nextWhenVisible() {\n // Don't call next when the page isn't visible\n // or the carousel or its parent isn't visible\n if (!document.hidden &&\n ($(this._element).is(':visible') && $(this._element).css('visibility') !== 'hidden')) {\n this.next()\n }\n }\n\n prev() {\n if (!this._isSliding) {\n this._slide(Direction.PREV)\n }\n }\n\n pause(event) {\n if (!event) {\n this._isPaused = true\n }\n\n if ($(this._element).find(Selector.NEXT_PREV)[0] &&\n Util.supportsTransitionEnd()) {\n Util.triggerTransitionEnd(this._element)\n this.cycle(true)\n }\n\n clearInterval(this._interval)\n this._interval = null\n }\n\n cycle(event) {\n if (!event) {\n this._isPaused = false\n }\n\n if (this._interval) {\n clearInterval(this._interval)\n this._interval = null\n }\n\n if (this._config.interval && !this._isPaused) {\n this._interval = setInterval(\n (document.visibilityState ? this.nextWhenVisible : this.next).bind(this),\n this._config.interval\n )\n }\n }\n\n to(index) {\n this._activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0]\n\n const activeIndex = this._getItemIndex(this._activeElement)\n\n if (index > this._items.length - 1 || index < 0) {\n return\n }\n\n if (this._isSliding) {\n $(this._element).one(Event.SLID, () => this.to(index))\n return\n }\n\n if (activeIndex === index) {\n this.pause()\n this.cycle()\n return\n }\n\n const direction = index > activeIndex ?\n Direction.NEXT :\n Direction.PREV\n\n this._slide(direction, this._items[index])\n }\n\n dispose() {\n $(this._element).off(EVENT_KEY)\n $.removeData(this._element, DATA_KEY)\n\n this._items = null\n this._config = null\n this._element = null\n this._interval = null\n this._isPaused = null\n this._isSliding = null\n this._activeElement = null\n this._indicatorsElement = null\n }\n\n\n // private\n\n _getConfig(config) {\n config = $.extend({}, Default, config)\n Util.typeCheckConfig(NAME, config, DefaultType)\n return config\n }\n\n _addEventListeners() {\n if (this._config.keyboard) {\n $(this._element)\n .on(Event.KEYDOWN, (event) => this._keydown(event))\n }\n\n if (this._config.pause === 'hover') {\n $(this._element)\n .on(Event.MOUSEENTER, (event) => this.pause(event))\n .on(Event.MOUSELEAVE, (event) => this.cycle(event))\n if ('ontouchstart' in document.documentElement) {\n // if it's a touch-enabled device, mouseenter/leave are fired as\n // part of the mouse compatibility events on first tap - the carousel\n // would stop cycling until user tapped out of it;\n // here, we listen for touchend, explicitly pause the carousel\n // (as if it's the second time we tap on it, mouseenter compat event\n // is NOT fired) and after a timeout (to allow for mouse compatibility\n // events to fire) we explicitly restart cycling\n $(this._element).on(Event.TOUCHEND, () => {\n this.pause()\n if (this.touchTimeout) {\n clearTimeout(this.touchTimeout)\n }\n this.touchTimeout = setTimeout((event) => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval)\n })\n }\n }\n }\n\n _keydown(event) {\n if (/input|textarea/i.test(event.target.tagName)) {\n return\n }\n\n switch (event.which) {\n case ARROW_LEFT_KEYCODE:\n event.preventDefault()\n this.prev()\n break\n case ARROW_RIGHT_KEYCODE:\n event.preventDefault()\n this.next()\n break\n default:\n return\n }\n }\n\n _getItemIndex(element) {\n this._items = $.makeArray($(element).parent().find(Selector.ITEM))\n return this._items.indexOf(element)\n }\n\n _getItemByDirection(direction, activeElement) {\n const isNextDirection = direction === Direction.NEXT\n const isPrevDirection = direction === Direction.PREV\n const activeIndex = this._getItemIndex(activeElement)\n const lastItemIndex = this._items.length - 1\n const isGoingToWrap = isPrevDirection && activeIndex === 0 ||\n isNextDirection && activeIndex === lastItemIndex\n\n if (isGoingToWrap && !this._config.wrap) {\n return activeElement\n }\n\n const delta = direction === Direction.PREV ? -1 : 1\n const itemIndex = (activeIndex + delta) % this._items.length\n\n return itemIndex === -1 ?\n this._items[this._items.length - 1] : this._items[itemIndex]\n }\n\n\n _triggerSlideEvent(relatedTarget, eventDirectionName) {\n const targetIndex = this._getItemIndex(relatedTarget)\n const fromIndex = this._getItemIndex($(this._element).find(Selector.ACTIVE_ITEM)[0])\n const slideEvent = $.Event(Event.SLIDE, {\n relatedTarget,\n direction: eventDirectionName,\n from: fromIndex,\n to: targetIndex\n })\n\n $(this._element).trigger(slideEvent)\n\n return slideEvent\n }\n\n _setActiveIndicatorElement(element) {\n if (this._indicatorsElement) {\n $(this._indicatorsElement)\n .find(Selector.ACTIVE)\n .removeClass(ClassName.ACTIVE)\n\n const nextIndicator = this._indicatorsElement.children[\n this._getItemIndex(element)\n ]\n\n if (nextIndicator) {\n $(nextIndicator).addClass(ClassName.ACTIVE)\n }\n }\n }\n\n _slide(direction, element) {\n const activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0]\n const activeElementIndex = this._getItemIndex(activeElement)\n const nextElement = element || activeElement &&\n this._getItemByDirection(direction, activeElement)\n const nextElementIndex = this._getItemIndex(nextElement)\n const isCycling = Boolean(this._interval)\n\n let directionalClassName\n let orderClassName\n let eventDirectionName\n\n if (direction === Direction.NEXT) {\n directionalClassName = ClassName.LEFT\n orderClassName = ClassName.NEXT\n eventDirectionName = Direction.LEFT\n } else {\n directionalClassName = ClassName.RIGHT\n orderClassName = ClassName.PREV\n eventDirectionName = Direction.RIGHT\n }\n\n if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) {\n this._isSliding = false\n return\n }\n\n const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName)\n if (slideEvent.isDefaultPrevented()) {\n return\n }\n\n if (!activeElement || !nextElement) {\n // some weirdness is happening, so we bail\n return\n }\n\n this._isSliding = true\n\n if (isCycling) {\n this.pause()\n }\n\n this._setActiveIndicatorElement(nextElement)\n\n const slidEvent = $.Event(Event.SLID, {\n relatedTarget: nextElement,\n direction: eventDirectionName,\n from: activeElementIndex,\n to: nextElementIndex\n })\n\n if (Util.supportsTransitionEnd() &&\n $(this._element).hasClass(ClassName.SLIDE)) {\n\n $(nextElement).addClass(orderClassName)\n\n Util.reflow(nextElement)\n\n $(activeElement).addClass(directionalClassName)\n $(nextElement).addClass(directionalClassName)\n\n $(activeElement)\n .one(Util.TRANSITION_END, () => {\n $(nextElement)\n .removeClass(`${directionalClassName} ${orderClassName}`)\n .addClass(ClassName.ACTIVE)\n\n $(activeElement).removeClass(`${ClassName.ACTIVE} ${orderClassName} ${directionalClassName}`)\n\n this._isSliding = false\n\n setTimeout(() => $(this._element).trigger(slidEvent), 0)\n\n })\n .emulateTransitionEnd(TRANSITION_DURATION)\n\n } else {\n $(activeElement).removeClass(ClassName.ACTIVE)\n $(nextElement).addClass(ClassName.ACTIVE)\n\n this._isSliding = false\n $(this._element).trigger(slidEvent)\n }\n\n if (isCycling) {\n this.cycle()\n }\n }\n\n\n // static\n\n static _jQueryInterface(config) {\n return this.each(function () {\n let data = $(this).data(DATA_KEY)\n const _config = $.extend({}, Default, $(this).data())\n\n if (typeof config === 'object') {\n $.extend(_config, config)\n }\n\n const action = typeof config === 'string' ? config : _config.slide\n\n if (!data) {\n data = new Carousel(this, _config)\n $(this).data(DATA_KEY, data)\n }\n\n if (typeof config === 'number') {\n data.to(config)\n } else if (typeof action === 'string') {\n if (data[action] === undefined) {\n throw new Error(`No method named \"${action}\"`)\n }\n data[action]()\n } else if (_config.interval) {\n data.pause()\n data.cycle()\n }\n })\n }\n\n static _dataApiClickHandler(event) {\n const selector = Util.getSelectorFromElement(this)\n\n if (!selector) {\n return\n }\n\n const target = $(selector)[0]\n\n if (!target || !$(target).hasClass(ClassName.CAROUSEL)) {\n return\n }\n\n const config = $.extend({}, $(target).data(), $(this).data())\n const slideIndex = this.getAttribute('data-slide-to')\n\n if (slideIndex) {\n config.interval = false\n }\n\n Carousel._jQueryInterface.call($(target), config)\n\n if (slideIndex) {\n $(target).data(DATA_KEY).to(slideIndex)\n }\n\n event.preventDefault()\n }\n\n }\n\n\n /**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n $(document)\n .on(Event.CLICK_DATA_API, Selector.DATA_SLIDE, Carousel._dataApiClickHandler)\n\n $(window).on(Event.LOAD_DATA_API, () => {\n $(Selector.DATA_RIDE).each(function () {\n const $carousel = $(this)\n Carousel._jQueryInterface.call($carousel, $carousel.data())\n })\n })\n\n\n /**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n */\n\n $.fn[NAME] = Carousel._jQueryInterface\n $.fn[NAME].Constructor = Carousel\n $.fn[NAME].noConflict = function () {\n $.fn[NAME] = JQUERY_NO_CONFLICT\n return Carousel._jQueryInterface\n }\n\n return Carousel\n\n})(jQuery)\n\nexport default Carousel\n"]} |