@mui/x-data-grid/esm/hooks/utils/useGridSelector.js

The Community plan edition of the Data Grid components (MUI X).

import * as React from 'react';
import { fastObjectShallowCompare } from '@mui/x-internals/fastObjectShallowCompare';
import { warnOnce } from '@mui/x-internals/warning';
import { useSyncExternalStore } from 'use-sync-external-store/shim';
import { useLazyRef } from "./useLazyRef.js";
const defaultCompare = Object.is;
export const objectShallowCompare = fastObjectShallowCompare;
const arrayShallowCompare = (a, b) => {
  if (a === b) {
    return true;
  }
  return a.length === b.length && a.every((v, i) => v === b[i]);
};
export const argsEqual = (prev, curr) => {
  let fn = Object.is;
  if (curr instanceof Array) {
    fn = arrayShallowCompare;
  } else if (curr instanceof Object) {
    fn = objectShallowCompare;
  }
  return fn(prev, curr);
};
const createRefs = () => ({
  state: null,
  equals: null,
  selector: null,
  args: undefined
});
const EMPTY = [];
const emptyGetSnapshot = () => null;
export const useGridSelector = (apiRef, selector, args = undefined, equals = defaultCompare) => {
  if (process.env.NODE_ENV !== 'production') {
    if (!apiRef.current.state) {
      warnOnce(['MUI X: `useGridSelector` has been called before the initialization of the state.', 'This hook can only be used inside the context of the grid.']);
    }
  }
  const refs = useLazyRef(createRefs);
  const didInit = refs.current.selector !== null;
  const [state, setState] = React.useState(
  // We don't use an initialization function to avoid allocations
  didInit ? null : selector(apiRef, args));
  refs.current.state = state;
  refs.current.equals = equals;
  refs.current.selector = selector;
  const prevArgs = refs.current.args;
  refs.current.args = args;
  if (didInit && !argsEqual(prevArgs, args)) {
    const newState = refs.current.selector(apiRef, refs.current.args);
    if (!refs.current.equals(refs.current.state, newState)) {
      refs.current.state = newState;
      setState(newState);
    }
  }
  const subscribe = React.useCallback(() => {
    if (refs.current.subscription) {
      return null;
    }
    refs.current.subscription = apiRef.current.store.subscribe(() => {
      const newState = refs.current.selector(apiRef, refs.current.args);
      if (!refs.current.equals(refs.current.state, newState)) {
        refs.current.state = newState;
        setState(newState);
      }
    });
    return null;
  },
  // eslint-disable-next-line react-hooks/exhaustive-deps
  EMPTY);
  const unsubscribe = React.useCallback(() => {
    return () => {
      if (refs.current.subscription) {
        refs.current.subscription();
        refs.current.subscription = undefined;
      }
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, EMPTY);
  useSyncExternalStore(unsubscribe, subscribe, emptyGetSnapshot);
  return state;
};