element-plus
Version:
A Component Library for Vue 3
101 lines (99 loc) • 3.88 kB
JavaScript
import { isUndefined } from "../../../utils/types.mjs";
import { debugWarn } from "../../../utils/error.mjs";
import { CAROUSEL_ITEM_NAME, carouselContextKey } from "./constants.mjs";
import { getCurrentInstance, inject, onBeforeUnmount, reactive, ref, unref } from "vue";
//#region ../../packages/components/carousel/src/use-carousel-item.ts
const useCarouselItem = (props) => {
const carouselContext = inject(carouselContextKey);
const instance = getCurrentInstance();
if (!carouselContext) debugWarn(CAROUSEL_ITEM_NAME, "usage: <el-carousel></el-carousel-item></el-carousel>");
if (!instance) debugWarn(CAROUSEL_ITEM_NAME, "compositional hook can only be invoked inside setups");
const carouselItemRef = ref();
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);
const { isCardType, isVertical, cardScale } = carouselContext;
function processIndex(index, activeIndex, length) {
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, activeIndex) {
const parentWidth = unref(isVertical) ? carouselContext.root.value?.offsetHeight || 0 : carouselContext.root.value?.offsetWidth || 0;
if (inStage.value) return parentWidth * ((2 - cardScale) * (index - activeIndex) + 1) / 4;
else if (index < activeIndex) return -(1 + cardScale) * parentWidth / 4;
else return (3 + cardScale) * parentWidth / 4;
}
function calcTranslate(index, activeIndex, isVertical) {
const rootEl = carouselContext.root.value;
if (!rootEl) return 0;
return ((isVertical ? rootEl.offsetHeight : rootEl.offsetWidth) || 0) * (index - activeIndex);
}
const translateItem = (index, activeIndex, oldIndex) => {
const _isCardType = unref(isCardType);
const carouselItemLength = carouselContext.items.value.length ?? 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) {
inStage.value = Math.round(Math.abs(index - activeIndex)) <= 1;
translate.value = calcCardTranslate(index, activeIndex);
scale.value = unref(active) ? 1 : cardScale;
} else translate.value = calcTranslate(index, activeIndex, _isVertical);
ready.value = true;
if (isActive && carouselItemRef.value) carouselContext.setContainerHeight(carouselItemRef.value.offsetHeight);
};
function handleItemClick() {
if (carouselContext && unref(isCardType)) {
const index = carouselContext.items.value.findIndex(({ uid }) => uid === instance.uid);
carouselContext.setActiveItem(index);
}
}
const carouselItemContext = {
props,
states: reactive({
hover,
translate,
scale,
active,
ready,
inStage,
animating
}),
uid: instance.uid,
getVnode: () => instance.vnode,
translateItem
};
carouselContext.addItem(carouselItemContext);
onBeforeUnmount(() => {
carouselContext.removeItem(carouselItemContext);
});
return {
carouselItemRef,
active,
animating,
hover,
inStage,
isVertical,
translate,
isCardType,
scale,
ready,
handleItemClick
};
};
//#endregion
export { useCarouselItem };
//# sourceMappingURL=use-carousel-item.mjs.map