return to the original file structure to avoid breaking modularity

1 files changed, 637 insertions, 0 deletions

diff --git a/js/src/carousel.js b/js/src/carousel.js
new file mode 100644
index 0000000000..5034f17984
--- /dev/null
+++ b/js/src/carousel.js
@@ -0,0 +1,637 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): carousel.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+import {
+  getjQuery,
+  TRANSITION_END,
+  emulateTransitionEnd,
+  getElementFromSelector,
+  getTransitionDurationFromElement,
+  isVisible,
+  makeArray,
+  reflow,
+  triggerTransitionEnd,
+  typeCheckConfig
+} from './util/index'
+import Data from './dom/data'
+import EventHandler from './dom/event-handler'
+import Manipulator from './dom/manipulator'
+import SelectorEngine from './dom/selector-engine'
+
+/**
+ * ------------------------------------------------------------------------
+ * Constants
+ * ------------------------------------------------------------------------
+ */
+
+const NAME = 'carousel'
+const VERSION = '4.3.1'
+const DATA_KEY = 'bs.carousel'
+const EVENT_KEY = `.${DATA_KEY}`
+const DATA_API_KEY = '.data-api'
+const ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key
+const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key
+const TOUCHEVENT_COMPAT_WAIT = 500 // Time for mouse compat events to fire after touch
+const SWIPE_THRESHOLD = 40
+
+const Default = {
+  interval: 5000,
+  keyboard: true,
+  slide: false,
+  pause: 'hover',
+  wrap: true,
+  touch: true
+}
+
+const DefaultType = {
+  interval: '(number|boolean)',
+  keyboard: 'boolean',
+  slide: '(boolean|string)',
+  pause: '(string|boolean)',
+  wrap: 'boolean',
+  touch: 'boolean'
+}
+
+const Direction = {
+  NEXT: 'next',
+  PREV: 'prev',
+  LEFT: 'left',
+  RIGHT: 'right'
+}
+
+const Event = {
+  SLIDE: `slide${EVENT_KEY}`,
+  SLID: `slid${EVENT_KEY}`,
+  KEYDOWN: `keydown${EVENT_KEY}`,
+  MOUSEENTER: `mouseenter${EVENT_KEY}`,
+  MOUSELEAVE: `mouseleave${EVENT_KEY}`,
+  TOUCHSTART: `touchstart${EVENT_KEY}`,
+  TOUCHMOVE: `touchmove${EVENT_KEY}`,
+  TOUCHEND: `touchend${EVENT_KEY}`,
+  POINTERDOWN: `pointerdown${EVENT_KEY}`,
+  POINTERUP: `pointerup${EVENT_KEY}`,
+  DRAG_START: `dragstart${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',
+  POINTER_EVENT: 'pointer-event'
+}
+
+const Selector = {
+  ACTIVE: '.active',
+  ACTIVE_ITEM: '.active.carousel-item',
+  ITEM: '.carousel-item',
+  ITEM_IMG: '.carousel-item img',
+  NEXT_PREV: '.carousel-item-next, .carousel-item-prev',
+  INDICATORS: '.carousel-indicators',
+  DATA_SLIDE: '[data-slide], [data-slide-to]',
+  DATA_RIDE: '[data-ride="carousel"]'
+}
+
+const PointerType = {
+  TOUCH: 'touch',
+  PEN: 'pen'
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * 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.touchStartX = 0
+    this.touchDeltaX = 0
+
+    this._config = this._getConfig(config)
+    this._element = element
+    this._indicatorsElement = SelectorEngine.findOne(Selector.INDICATORS, this._element)
+    this._touchSupported = 'ontouchstart' in document.documentElement || navigator.maxTouchPoints > 0
+    this._pointerEvent = Boolean(window.PointerEvent || window.MSPointerEvent)
+
+    this._addEventListeners()
+    Data.setData(element, DATA_KEY, this)
+  }
+
+  // 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 && isVisible(this._element)) {
+      this.next()
+    }
+  }
+
+  prev() {
+    if (!this._isSliding) {
+      this._slide(Direction.PREV)
+    }
+  }
+
+  pause(event) {
+    if (!event) {
+      this._isPaused = true
+    }
+
+    if (SelectorEngine.findOne(Selector.NEXT_PREV, this._element)) {
+      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 && this._config.interval && !this._isPaused) {
+      this._interval = setInterval(
+        (document.visibilityState ? this.nextWhenVisible : this.next).bind(this),
+        this._config.interval
+      )
+    }
+  }
+
+  to(index) {
+    this._activeElement = SelectorEngine.findOne(Selector.ACTIVE_ITEM, this._element)
+    const activeIndex = this._getItemIndex(this._activeElement)
+
+    if (index > this._items.length - 1 || index < 0) {
+      return
+    }
+
+    if (this._isSliding) {
+      EventHandler.one(this._element, 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() {
+    EventHandler.off(this._element, EVENT_KEY)
+    Data.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
+    }
+    typeCheckConfig(NAME, config, DefaultType)
+    return config
+  }
+
+  _handleSwipe() {
+    const absDeltax = Math.abs(this.touchDeltaX)
+
+    if (absDeltax <= SWIPE_THRESHOLD) {
+      return
+    }
+
+    const direction = absDeltax / this.touchDeltaX
+
+    this.touchDeltaX = 0
+
+    // swipe left
+    if (direction > 0) {
+      this.prev()
+    }
+
+    // swipe right
+    if (direction < 0) {
+      this.next()
+    }
+  }
+
+  _addEventListeners() {
+    if (this._config.keyboard) {
+      EventHandler
+        .on(this._element, Event.KEYDOWN, event => this._keydown(event))
+    }
+
+    if (this._config.pause === 'hover') {
+      EventHandler
+        .on(this._element, Event.MOUSEENTER, event => this.pause(event))
+      EventHandler
+        .on(this._element, Event.MOUSELEAVE, event => this.cycle(event))
+    }
+
+    if (this._config.touch && this._touchSupported) {
+      this._addTouchEventListeners()
+    }
+  }
+
+  _addTouchEventListeners() {
+    const start = event => {
+      if (this._pointerEvent && PointerType[event.pointerType.toUpperCase()]) {
+        this.touchStartX = event.clientX
+      } else if (!this._pointerEvent) {
+        this.touchStartX = event.touches[0].clientX
+      }
+    }
+
+    const move = event => {
+      // ensure swiping with one touch and not pinching
+      if (event.touches && event.touches.length > 1) {
+        this.touchDeltaX = 0
+      } else {
+        this.touchDeltaX = event.touches[0].clientX - this.touchStartX
+      }
+    }
+
+    const end = event => {
+      if (this._pointerEvent && PointerType[event.pointerType.toUpperCase()]) {
+        this.touchDeltaX = event.clientX - this.touchStartX
+      }
+
+      this._handleSwipe()
+      if (this._config.pause === 'hover') {
+        // 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.pause()
+        if (this.touchTimeout) {
+          clearTimeout(this.touchTimeout)
+        }
+
+        this.touchTimeout = setTimeout(event => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval)
+      }
+    }
+
+    makeArray(SelectorEngine.find(Selector.ITEM_IMG, this._element)).forEach(itemImg => {
+      EventHandler.on(itemImg, Event.DRAG_START, e => e.preventDefault())
+    })
+
+    if (this._pointerEvent) {
+      EventHandler.on(this._element, Event.POINTERDOWN, event => start(event))
+      EventHandler.on(this._element, Event.POINTERUP, event => end(event))
+
+      this._element.classList.add(ClassName.POINTER_EVENT)
+    } else {
+      EventHandler.on(this._element, Event.TOUCHSTART, event => start(event))
+      EventHandler.on(this._element, Event.TOUCHMOVE, event => move(event))
+      EventHandler.on(this._element, Event.TOUCHEND, event => end(event))
+    }
+  }
+
+  _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 ?
+      makeArray(SelectorEngine.find(Selector.ITEM, element.parentNode)) :
+      []
+
+    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(SelectorEngine.findOne(Selector.ACTIVE_ITEM, this._element))
+
+    return EventHandler.trigger(this._element, Event.SLIDE, {
+      relatedTarget,
+      direction: eventDirectionName,
+      from: fromIndex,
+      to: targetIndex
+    })
+  }
+
+  _setActiveIndicatorElement(element) {
+    if (this._indicatorsElement) {
+      const indicators = SelectorEngine.find(Selector.ACTIVE, this._indicatorsElement)
+      for (let i = 0; i < indicators.length; i++) {
+        indicators[i].classList.remove(ClassName.ACTIVE)
+      }
+
+      const nextIndicator = this._indicatorsElement.children[
+        this._getItemIndex(element)
+      ]
+
+      if (nextIndicator) {
+        nextIndicator.classList.add(ClassName.ACTIVE)
+      }
+    }
+  }
+
+  _slide(direction, element) {
+    const activeElement = SelectorEngine.findOne(Selector.ACTIVE_ITEM, this._element)
+    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.classList.contains(ClassName.ACTIVE)) {
+      this._isSliding = false
+      return
+    }
+
+    const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName)
+    if (slideEvent.defaultPrevented) {
+      return
+    }
+
+    if (!activeElement || !nextElement) {
+      // Some weirdness is happening, so we bail
+      return
+    }
+
+    this._isSliding = true
+
+    if (isCycling) {
+      this.pause()
+    }
+
+    this._setActiveIndicatorElement(nextElement)
+
+    if (this._element.classList.contains(ClassName.SLIDE)) {
+      nextElement.classList.add(orderClassName)
+
+      reflow(nextElement)
+
+      activeElement.classList.add(directionalClassName)
+      nextElement.classList.add(directionalClassName)
+
+      const nextElementInterval = parseInt(nextElement.getAttribute('data-interval'), 10)
+      if (nextElementInterval) {
+        this._config.defaultInterval = this._config.defaultInterval || this._config.interval
+        this._config.interval = nextElementInterval
+      } else {
+        this._config.interval = this._config.defaultInterval || this._config.interval
+      }
+
+      const transitionDuration = getTransitionDurationFromElement(activeElement)
+
+      EventHandler
+        .one(activeElement, TRANSITION_END, () => {
+          nextElement.classList.remove(directionalClassName)
+          nextElement.classList.remove(orderClassName)
+          nextElement.classList.add(ClassName.ACTIVE)
+
+          activeElement.classList.remove(ClassName.ACTIVE)
+          activeElement.classList.remove(orderClassName)
+          activeElement.classList.remove(directionalClassName)
+
+          this._isSliding = false
+
+          setTimeout(() => {
+            EventHandler.trigger(this._element, Event.SLID, {
+              relatedTarget: nextElement,
+              direction: eventDirectionName,
+              from: activeElementIndex,
+              to: nextElementIndex
+            })
+          }, 0)
+        })
+
+      emulateTransitionEnd(activeElement, transitionDuration)
+    } else {
+      activeElement.classList.remove(ClassName.ACTIVE)
+      nextElement.classList.add(ClassName.ACTIVE)
+
+      this._isSliding = false
+      EventHandler.trigger(this._element, Event.SLID, {
+        relatedTarget: nextElement,
+        direction: eventDirectionName,
+        from: activeElementIndex,
+        to: nextElementIndex
+      })
+    }
+
+    if (isCycling) {
+      this.cycle()
+    }
+  }
+
+  // Static
+
+  static carouselInterface(element, config) {
+    let data = Data.getData(element, DATA_KEY)
+    let _config = {
+      ...Default,
+      ...Manipulator.getDataAttributes(element)
+    }
+
+    if (typeof config === 'object') {
+      _config = {
+        ..._config,
+        ...config
+      }
+    }
+
+    const action = typeof config === 'string' ? config : _config.slide
+
+    if (!data) {
+      data = new Carousel(element, _config)
+    }
+
+    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 && _config.ride) {
+      data.pause()
+      data.cycle()
+    }
+  }
+
+  static jQueryInterface(config) {
+    return this.each(function () {
+      Carousel.carouselInterface(this, config)
+    })
+  }
+
+  static dataApiClickHandler(event) {
+    const target = getElementFromSelector(this)
+
+    if (!target || !target.classList.contains(ClassName.CAROUSEL)) {
+      return
+    }
+
+    const config = {
+      ...Manipulator.getDataAttributes(target),
+      ...Manipulator.getDataAttributes(this)
+    }
+    const slideIndex = this.getAttribute('data-slide-to')
+
+    if (slideIndex) {
+      config.interval = false
+    }
+
+    Carousel.carouselInterface(target, config)
+
+    if (slideIndex) {
+      Data.getData(target, DATA_KEY).to(slideIndex)
+    }
+
+    event.preventDefault()
+  }
+
+  static getInstance(element) {
+    return Data.getData(element, DATA_KEY)
+  }
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * Data Api implementation
+ * ------------------------------------------------------------------------
+ */
+
+EventHandler
+  .on(document, Event.CLICK_DATA_API, Selector.DATA_SLIDE, Carousel.dataApiClickHandler)
+
+EventHandler.on(window, Event.LOAD_DATA_API, () => {
+  const carousels = makeArray(SelectorEngine.find(Selector.DATA_RIDE))
+  for (let i = 0, len = carousels.length; i < len; i++) {
+    Carousel.carouselInterface(carousels[i], Data.getData(carousels[i], DATA_KEY))
+  }
+})
+
+const $ = getjQuery()
+
+/**
+ * ------------------------------------------------------------------------
+ * jQuery
+ * ------------------------------------------------------------------------
+ * add .carousel to jQuery only if jQuery is present
+ */
+/* istanbul ignore if */
+if ($) {
+  const JQUERY_NO_CONFLICT = $.fn[NAME]
+  $.fn[NAME] = Carousel.jQueryInterface
+  $.fn[NAME].Constructor = Carousel
+  $.fn[NAME].noConflict = () => {
+    $.fn[NAME] = JQUERY_NO_CONFLICT
+    return Carousel.jQueryInterface
+  }
+}
+
+export default Carousel