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42 lines
1.8 KiB
42 lines
1.8 KiB
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
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function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
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function _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
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function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
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import { shallowEqual } from '@react-dnd/shallowequal';
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import { useState, useCallback } from 'react';
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import { useIsomorphicLayoutEffect } from './useIsomorphicLayoutEffect';
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/**
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*
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* @param monitor The monitor to collect state from
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* @param collect The collecting function
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* @param onUpdate A method to invoke when updates occur
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*/
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export function useCollector(monitor, collect, onUpdate) {
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var _useState = useState(function () {
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return collect(monitor);
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}),
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_useState2 = _slicedToArray(_useState, 2),
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collected = _useState2[0],
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setCollected = _useState2[1];
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var updateCollected = useCallback(function () {
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var nextValue = collect(monitor);
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if (!shallowEqual(collected, nextValue)) {
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setCollected(nextValue);
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if (onUpdate) {
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onUpdate();
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}
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}
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}, [collected, monitor, onUpdate]); // update the collected properties after the first render
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// and the components are attached to dnd-core
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useIsomorphicLayoutEffect(updateCollected, []);
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return [collected, updateCollected];
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} |