hxgksystemapp/node_modules/element-plus/es/components/carousel/src/use-carousel.mjs.map

{"version":3,"file":"use-carousel.mjs","sources":["../../../../../../packages/components/carousel/src/use-carousel.ts"],"sourcesContent":["import {\n  computed,\n  getCurrentInstance,\n  isVNode,\n  onBeforeUnmount,\n  onMounted,\n  provide,\n  ref,\n  shallowRef,\n  unref,\n  useSlots,\n  watch,\n} from 'vue'\nimport { throttle } from 'lodash-unified'\nimport { useResizeObserver } from '@vueuse/core'\nimport { debugWarn, flattedChildren, isString } from '@element-plus/utils'\nimport { useOrderedChildren } from '@element-plus/hooks'\nimport { carouselContextKey } from './constants'\n\nimport type { SetupContext } from 'vue'\nimport type { CarouselItemContext } from './constants'\nimport type { CarouselEmits, CarouselProps } from './carousel'\n\nconst THROTTLE_TIME = 300\n\nexport const useCarousel = (\n  props: CarouselProps,\n  emit: SetupContext<CarouselEmits>['emit'],\n  componentName: string\n) => {\n  const {\n    children: items,\n    addChild: addItem,\n    removeChild: removeItem,\n  } = useOrderedChildren<CarouselItemContext>(\n    getCurrentInstance()!,\n    'ElCarouselItem'\n  )\n\n  const slots = useSlots()\n\n  // refs\n  const activeIndex = ref(-1)\n  const timer = ref<ReturnType<typeof setInterval> | null>(null)\n  const hover = ref(false)\n  const root = ref<HTMLDivElement>()\n  const containerHeight = ref<number>(0)\n  const isItemsTwoLength = ref(true)\n\n  // computed\n  const arrowDisplay = computed(\n    () => props.arrow !== 'never' && !unref(isVertical)\n  )\n\n  const hasLabel = computed(() => {\n    return items.value.some((item) => item.props.label.toString().length > 0)\n  })\n\n  const isCardType = computed(() => props.type === 'card')\n  const isVertical = computed(() => props.direction === 'vertical')\n\n  const containerStyle = computed(() => {\n    if (props.height !== 'auto') {\n      return {\n        height: props.height,\n      }\n    }\n    return {\n      height: `${containerHeight.value}px`,\n      overflow: 'hidden',\n    }\n  })\n\n  // methods\n  const throttledArrowClick = throttle(\n    (index: number) => {\n      setActiveItem(index)\n    },\n    THROTTLE_TIME,\n    { trailing: true }\n  )\n\n  const throttledIndicatorHover = throttle((index: number) => {\n    handleIndicatorHover(index)\n  }, THROTTLE_TIME)\n\n  const isTwoLengthShow = (index: number) => {\n    if (!isItemsTwoLength.value) return true\n    return activeIndex.value <= 1 ? index <= 1 : index > 1\n  }\n\n  function pauseTimer() {\n    if (timer.value) {\n      clearInterval(timer.value)\n      timer.value = null\n    }\n  }\n\n  function startTimer() {\n    if (props.interval <= 0 || !props.autoplay || timer.value) return\n    timer.value = setInterval(() => playSlides(), props.interval)\n  }\n\n  const playSlides = () => {\n    if (activeIndex.value < items.value.length - 1) {\n      activeIndex.value = activeIndex.value + 1\n    } else if (props.loop) {\n      activeIndex.value = 0\n    }\n  }\n\n  function setActiveItem(index: number | string) {\n    if (isString(index)) {\n      const filteredItems = items.value.filter(\n        (item) => item.props.name === index\n      )\n      if (filteredItems.length > 0) {\n        index = items.value.indexOf(filteredItems[0])\n      }\n    }\n    index = Number(index)\n    if (Number.isNaN(index) || index !== Math.floor(index)) {\n      debugWarn(componentName, 'index must be integer.')\n      return\n    }\n    const itemCount = items.value.length\n    const oldIndex = activeIndex.value\n    if (index < 0) {\n      activeIndex.value = props.loop ? itemCount - 1 : 0\n    } else if (index >= itemCount) {\n      activeIndex.value = props.loop ? 0 : itemCount - 1\n    } else {\n      activeIndex.value = index\n    }\n    if (oldIndex === activeIndex.value) {\n      resetItemPosition(oldIndex)\n    }\n    resetTimer()\n  }\n\n  function resetItemPosition(oldIndex?: number) {\n    items.value.forEach((item, index) => {\n      item.translateItem(index, activeIndex.value, oldIndex)\n    })\n  }\n\n  function itemInStage(item: CarouselItemContext, index: number) {\n    const