sgauthier
6e64e138e2
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48 lines
2.7 KiB
JavaScript
48 lines
2.7 KiB
JavaScript
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
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function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
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function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
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function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
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function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_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 equal from 'fast-deep-equal';
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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); // This needs to be a deep-equality check because some monitor-collected values
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// include XYCoord objects that may be equivalent, but do not have instance equality.
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if (!equal(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 react renders.
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// Note that the "Dustbin Stress Test" fails if this is not
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// done when the component updates
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useIsomorphicLayoutEffect(updateCollected);
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return [collected, updateCollected];
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} |