@mui/x-charts/internals/plugins/utils/selectors.js

The community edition of MUI X Charts components.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.createSelector = void 0;
var _reselect = require("reselect");
const reselectCreateSelector = (0, _reselect.createSelectorCreator)({
  memoize: _reselect.lruMemoize,
  memoizeOptions: {
    maxSize: 1,
    equalityCheck: Object.is
  }
});
const cache = new WeakMap();
/**
 * Method wrapping reselect's createSelector to provide caching for chart instances.
 *
 */
const createSelector = (...createSelectorArgs) => {
  const selector = (state, selectorArgs) => {
    const cacheKey = state.cacheKey;

    // If there is no cache for the current chart instance, create one.
    let cacheForCurrentChartInstance = cache.get(cacheKey);
    if (!cacheForCurrentChartInstance) {
      cacheForCurrentChartInstance = new Map();
      cache.set(cacheKey, cacheForCurrentChartInstance);
    }

    // If there is a cached selector, execute it.
    const cachedSelector = cacheForCurrentChartInstance.get(createSelectorArgs);
    if (cachedSelector) {
      return cachedSelector(state, selectorArgs);
    }

    // Otherwise, create a new selector and cache it and execute it.
    const fn = reselectCreateSelector(...createSelectorArgs);
    cacheForCurrentChartInstance.set(createSelectorArgs, fn);
    return fn(state, selectorArgs);
  };
  return selector;
};
exports.createSelector = createSelector;