64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
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import * as React from 'react';
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import { useRef, useEffect } from 'react';
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import findDOMNode from "rc-util/es/Dom/findDOMNode";
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import raf from "rc-util/es/raf";
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import CacheMap from '../utils/CacheMap';
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export default function useHeights(getKey, onItemAdd, onItemRemove) {
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var _React$useState = React.useState(0),
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_React$useState2 = _slicedToArray(_React$useState, 2),
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updatedMark = _React$useState2[0],
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setUpdatedMark = _React$useState2[1];
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var instanceRef = useRef(new Map());
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var heightsRef = useRef(new CacheMap());
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var collectRafRef = useRef();
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function cancelRaf() {
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raf.cancel(collectRafRef.current);
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}
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function collectHeight() {
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var sync = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
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cancelRaf();
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var doCollect = function doCollect() {
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instanceRef.current.forEach(function (element, key) {
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if (element && element.offsetParent) {
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var htmlElement = findDOMNode(element);
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var offsetHeight = htmlElement.offsetHeight;
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if (heightsRef.current.get(key) !== offsetHeight) {
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heightsRef.current.set(key, htmlElement.offsetHeight);
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}
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}
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});
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// Always trigger update mark to tell parent that should re-calculate heights when resized
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setUpdatedMark(function (c) {
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return c + 1;
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});
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};
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if (sync) {
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doCollect();
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} else {
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collectRafRef.current = raf(doCollect);
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}
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}
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function setInstanceRef(item, instance) {
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var key = getKey(item);
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var origin = instanceRef.current.get(key);
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if (instance) {
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instanceRef.current.set(key, instance);
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collectHeight();
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} else {
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instanceRef.current.delete(key);
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}
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// Instance changed
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if (!origin !== !instance) {
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if (instance) {
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onItemAdd === null || onItemAdd === void 0 ? void 0 : onItemAdd(item);
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} else {
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onItemRemove === null || onItemRemove === void 0 ? void 0 : onItemRemove(item);
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}
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}
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}
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useEffect(function () {
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return cancelRaf;
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}, []);
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return [setInstanceRef, collectHeight, heightsRef.current, updatedMark];
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} |