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refactor(components): [carousel-item] (#10219)
Co-authored-by: JeremyWuuuuu <15975785+JeremyWuuuuu@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,5 @@ | ||
| import type Carousel from './carousel.vue' | ||
| import type CarouselItem from './carousel-item.vue' | ||
|
|
||
| export type CarouselInstance = InstanceType<typeof Carousel> | ||
| export type CarouselItemInstance = InstanceType<typeof CarouselItem> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| import { | ||
| getCurrentInstance, | ||
| inject, | ||
| onMounted, | ||
| onUnmounted, | ||
| reactive, | ||
| ref, | ||
| unref, | ||
| } from 'vue' | ||
| import { debugWarn, isUndefined } from '@element-plus/utils' | ||
| import { carouselContextKey } from '@element-plus/tokens' | ||
|
|
||
| import type { CarouselItemProps } from './carousel-item' | ||
|
|
||
| export const useCarouselItem = ( | ||
| props: CarouselItemProps, | ||
| componentName: string | ||
| ) => { | ||
| const carouselContext = inject(carouselContextKey)! | ||
| // instance | ||
| const instance = getCurrentInstance()! | ||
| if (!carouselContext) { | ||
| debugWarn( | ||
| componentName, | ||
| 'usage: <el-carousel></el-carousel-item></el-carousel>' | ||
| ) | ||
| } | ||
|
|
||
| if (!instance) { | ||
| debugWarn( | ||
| componentName, | ||
| 'compositional hook can only be invoked inside setups' | ||
| ) | ||
| } | ||
|
|
||
| const CARD_SCALE = 0.83 | ||
|
|
||
| const hover = ref(false) | ||
| const translate = ref(0) | ||
| const scale = ref(1) | ||
| const active = ref(false) | ||
| const ready = ref(false) | ||
| const inStage = ref(false) | ||
| const animating = ref(false) | ||
|
|
||
| // computed | ||
| const { isCardType, isVertical } = carouselContext | ||
|
|
||
| // methods | ||
|
|
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| function processIndex(index: number, activeIndex: number, length: number) { | ||
| const lastItemIndex = length - 1 | ||
| const prevItemIndex = activeIndex - 1 | ||
| const nextItemIndex = activeIndex + 1 | ||
| const halfItemIndex = length / 2 | ||
|
|
||
| if (activeIndex === 0 && index === lastItemIndex) { | ||
| return -1 | ||
| } else if (activeIndex === lastItemIndex && index === 0) { | ||
| return length | ||
| } else if (index < prevItemIndex && activeIndex - index >= halfItemIndex) { | ||
| return length + 1 | ||
| } else if (index > nextItemIndex && index - activeIndex >= halfItemIndex) { | ||
| return -2 | ||
| } | ||
| return index | ||
| } | ||
|
|
||
| function calcCardTranslate(index: number, activeIndex: number) { | ||
| const parentWidth = carouselContext.root.value?.offsetWidth || 0 | ||
| if (inStage.value) { | ||
| return (parentWidth * ((2 - CARD_SCALE) * (index - activeIndex) + 1)) / 4 | ||
| } else if (index < activeIndex) { | ||
| return (-(1 + CARD_SCALE) * parentWidth) / 4 | ||
| } else { | ||
| return ((3 + CARD_SCALE) * parentWidth) / 4 | ||
| } | ||
| } | ||
|
|
||
| function calcTranslate( | ||
| index: number, | ||
| activeIndex: number, | ||
| isVertical: boolean | ||
| ) { | ||
| const rootEl = carouselContext.root.value | ||
| if (!rootEl) return 0 | ||
|
|
||
| const distance = | ||
| (isVertical ? rootEl.offsetHeight : rootEl.offsetWidth) || 0 | ||
| return distance * (index - activeIndex) | ||
| } | ||
|
|
||
| const translateItem = ( | ||
| index: number, | ||
| activeIndex: number, | ||
| oldIndex?: number | ||
| ) => { | ||
| const _isCardType = unref(isCardType) | ||
| const carouselItemLength = carouselContext.items.value.length ?? Number.NaN | ||
|
|
||
| const isActive = index === activeIndex | ||
| if (!_isCardType && !isUndefined(oldIndex)) { | ||
| animating.value = isActive || index === oldIndex | ||
| } | ||
|
|
||
| if (!isActive && carouselItemLength > 2 && carouselContext.loop) { | ||
| index = processIndex(index, activeIndex, carouselItemLength) | ||
| } | ||
|
|
||
| const _isVertical = unref(isVertical) | ||
| active.value = isActive | ||
|
|
||
| if (_isCardType) { | ||
| if (_isVertical) { | ||
| debugWarn( | ||
| 'Carousel', | ||
| 'vertical direction is not supported for card mode' | ||
| ) | ||
| } | ||
| inStage.value = Math.round(Math.abs(index - activeIndex)) <= 1 | ||
| translate.value = calcCardTranslate(index, activeIndex) | ||
| scale.value = unref(active) ? 1 : CARD_SCALE | ||
| } else { | ||
| translate.value = calcTranslate(index, activeIndex, _isVertical) | ||
| } | ||
|
|
||
| ready.value = true | ||
| } | ||
|
|
||
| function handleItemClick() { | ||
| if (carouselContext && unref(isCardType)) { | ||
| const index = carouselContext.items.value.findIndex( | ||
| ({ uid }) => uid === instance.uid | ||
| ) | ||
| carouselContext.setActiveItem(index) | ||
| } | ||
| } | ||
|
|
||
| // lifecycle | ||
| onMounted(() => { | ||
| carouselContext.addItem({ | ||
| props, | ||
| states: reactive({ | ||
| hover, | ||
| translate, | ||
| scale, | ||
| active, | ||
| ready, | ||
| inStage, | ||
| animating, | ||
| }), | ||
| uid: instance.uid, | ||
| translateItem, | ||
| }) | ||
| }) | ||
|
|
||
| onUnmounted(() => { | ||
| carouselContext.removeItem(instance.uid) | ||
| }) | ||
|
|
||
| return { | ||
| active, | ||
| animating, | ||
| hover, | ||
| inStage, | ||
| isVertical, | ||
| translate, | ||
| isCardType, | ||
| scale, | ||
| ready, | ||
| handleItemClick, | ||
| } | ||
| } |