element-plus
Version:
A Component Library for Vue 3
229 lines (227 loc) • 7.26 kB
JavaScript
import { CHANGE_EVENT } from "../../../constants/event.mjs";
import { isString } from "../../../utils/types.mjs";
import { debugWarn } from "../../../utils/error.mjs";
import { flattedChildren } from "../../../utils/vue/vnode.mjs";
import { useOrderedChildren } from "../../../hooks/use-ordered-children/index.mjs";
import { CAROUSEL_ITEM_NAME, carouselContextKey } from "./constants.mjs";
import { useResizeObserver } from "@vueuse/core";
import { throttle } from "lodash-unified";
import { computed, getCurrentInstance, isVNode, onBeforeUnmount, onMounted, provide, ref, shallowRef, unref, useSlots, watch } from "vue";
//#region ../../packages/components/carousel/src/use-carousel.ts
const THROTTLE_TIME = 300;
const useCarousel = (props, emit, componentName) => {
const { children: items, addChild: addItem, removeChild: removeItem, ChildrenSorter: ItemsSorter } = useOrderedChildren(getCurrentInstance(), CAROUSEL_ITEM_NAME);
const slots = useSlots();
const activeIndex = ref(-1);
const timer = ref(null);
const hover = ref(false);
const root = ref();
const containerHeight = ref(0);
const isItemsTwoLength = ref(true);
const arrowDisplay = computed(() => props.arrow !== "never" && !unref(isVertical));
const hasLabel = computed(() => {
return items.value.some((item) => item.props.label.toString().length > 0);
});
const isCardType = computed(() => props.type === "card");
const isVertical = computed(() => props.direction === "vertical");
const containerStyle = computed(() => {
if (props.height !== "auto") return { height: props.height };
return {
height: `${containerHeight.value}px`,
overflow: "hidden"
};
});
const throttledArrowClick = throttle((index) => {
setActiveItem(index);
}, THROTTLE_TIME, { trailing: true });
const throttledIndicatorHover = throttle((index) => {
handleIndicatorHover(index);
}, THROTTLE_TIME);
const isTwoLengthShow = (index) => {
if (!isItemsTwoLength.value) return true;
return activeIndex.value <= 1 ? index <= 1 : index > 1;
};
function pauseTimer() {
if (timer.value) {
clearInterval(timer.value);
timer.value = null;
}
}
function startTimer() {
if (props.interval <= 0 || !props.autoplay || timer.value) return;
timer.value = setInterval(() => playSlides(), props.interval);
}
const playSlides = () => {
if (activeIndex.value < items.value.length - 1) activeIndex.value = activeIndex.value + 1;
else if (props.loop) activeIndex.value = 0;
};
function setActiveItem(index) {
if (isString(index)) {
const filteredItems = items.value.filter((item) => item.props.name === index);
if (filteredItems.length > 0) index = items.value.indexOf(filteredItems[0]);
}
index = Number(index);
if (Number.isNaN(index) || index !== Math.floor(index)) {
debugWarn(componentName, "index must be integer.");
return;
}
const itemCount = items.value.length;
const oldIndex = activeIndex.value;
if (index < 0) activeIndex.value = props.loop ? itemCount - 1 : 0;
else if (index >= itemCount) activeIndex.value = props.loop ? 0 : itemCount - 1;
else activeIndex.value = index;
if (oldIndex === activeIndex.value) resetItemPosition(oldIndex);
resetTimer();
}
function resetItemPosition(oldIndex) {
items.value.forEach((item, index) => {
item.translateItem(index, activeIndex.value, oldIndex);
});
}
function itemInStage(item, index) {
const _items = unref(items);
const itemCount = _items.length;
if (itemCount === 0 || !item.states.inStage) return false;
const nextItemIndex = index + 1;
const prevItemIndex = index - 1;
const lastItemIndex = itemCount - 1;
const isLastItemActive = _items[lastItemIndex].states.active;
const isFirstItemActive = _items[0].states.active;
const isNextItemActive = _items[nextItemIndex]?.states?.active;
const isPrevItemActive = _items[prevItemIndex]?.states?.active;
if (index === lastItemIndex && isFirstItemActive || isNextItemActive) return "left";
else if (index === 0 && isLastItemActive || isPrevItemActive) return "right";
return false;
}
function handleMouseEnter() {
hover.value = true;
if (props.pauseOnHover) pauseTimer();
}
function handleMouseLeave() {
hover.value = false;
startTimer();
}
function handleButtonEnter(arrow) {
if (unref(isVertical)) return;
items.value.forEach((item, index) => {
if (arrow === itemInStage(item, index)) item.states.hover = true;
});
}
function handleButtonLeave() {
if (unref(isVertical)) return;
items.value.forEach((item) => {
item.states.hover = false;
});
}
function handleIndicatorClick(index) {
activeIndex.value = index;
}
function handleIndicatorHover(index) {
if (props.trigger === "hover" && index !== activeIndex.value) activeIndex.value = index;
}
function prev() {
setActiveItem(activeIndex.value - 1);
}
function next() {
setActiveItem(activeIndex.value + 1);
}
function resetTimer() {
pauseTimer();
if (!props.pauseOnHover || !hover.value) startTimer();
}
function setContainerHeight(height) {
if (props.height !== "auto") return;
containerHeight.value = height;
}
function PlaceholderItem() {
const defaultSlots = slots.default?.();
if (!defaultSlots) return null;
const normalizeSlots = flattedChildren(defaultSlots).filter((slot) => {
return isVNode(slot) && slot.type.name === CAROUSEL_ITEM_NAME;
});
if (normalizeSlots?.length === 2 && props.loop && !isCardType.value) {
isItemsTwoLength.value = true;
return normalizeSlots;
}
isItemsTwoLength.value = false;
return null;
}
watch(() => activeIndex.value, (current, prev) => {
resetItemPosition(prev);
if (isItemsTwoLength.value) {
current = current % 2;
prev = prev % 2;
}
if (prev > -1) emit(CHANGE_EVENT, current, prev);
});
const exposeActiveIndex = computed({
get: () => {
return isItemsTwoLength.value ? activeIndex.value % 2 : activeIndex.value;
},
set: (value) => activeIndex.value = value
});
watch(() => props.autoplay, (autoplay) => {
autoplay ? startTimer() : pauseTimer();
});
watch(() => props.loop, () => {
setActiveItem(activeIndex.value);
});
watch(() => props.interval, () => {
resetTimer();
});
const resizeObserver = shallowRef();
onMounted(() => {
watch(() => items.value, () => {
if (items.value.length > 0) setActiveItem(props.initialIndex);
}, { immediate: true });
resizeObserver.value = useResizeObserver(root.value, () => {
resetItemPosition();
});
startTimer();
});
onBeforeUnmount(() => {
pauseTimer();
if (root.value && resizeObserver.value) resizeObserver.value.stop();
});
provide(carouselContextKey, {
root,
isCardType,
isVertical,
items,
loop: props.loop,
cardScale: props.cardScale,
addItem,
removeItem,
setActiveItem,
setContainerHeight
});
return {
root,
activeIndex,
exposeActiveIndex,
arrowDisplay,
hasLabel,
hover,
isCardType,
items,
isVertical,
containerStyle,
isItemsTwoLength,
handleButtonEnter,
handleButtonLeave,
handleIndicatorClick,
handleMouseEnter,
handleMouseLeave,
setActiveItem,
prev,
next,
PlaceholderItem,
isTwoLengthShow,
ItemsSorter,
throttledArrowClick,
throttledIndicatorHover
};
};
//#endregion
export { useCarousel };
//# sourceMappingURL=use-carousel.mjs.map