@mui/x-charts/legacy/context/HighlightProvider.js

The community edition of the charts components (MUI X).

import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
import _extends from "@babel/runtime/helpers/esm/extends";
import * as React from 'react';
import { jsx as _jsx } from "react/jsx-runtime";
var defaultScope = {
  highlighted: 'none',
  faded: 'none'
};
export var HighlighContext = /*#__PURE__*/React.createContext({
  item: null,
  scope: defaultScope,
  dispatch: function dispatch() {
    return null;
  }
});
var dataReducer = function dataReducer(prevState, action) {
  switch (action.type) {
    case 'enterItem':
      return _extends({}, prevState, {
        item: action.item,
        scope: _extends({}, defaultScope, action.scope)
      });
    case 'leaveItem':
      if (prevState.item === null || Object.keys(action.item).some(function (key) {
        return action.item[key] !== prevState.item[key];
      })) {
        // The item is already something else
        return prevState;
      }
      return _extends({}, prevState, {
        item: null
      });
    default:
      return prevState;
  }
};
export function HighlightProvider(_ref) {
  var children = _ref.children;
  var _React$useReducer = React.useReducer(dataReducer, {
      item: null,
      scope: defaultScope
    }),
    _React$useReducer2 = _slicedToArray(_React$useReducer, 2),
    data = _React$useReducer2[0],
    dispatch = _React$useReducer2[1];
  var value = React.useMemo(function () {
    return _extends({}, data, {
      dispatch: dispatch
    });
  }, [data]);
  return /*#__PURE__*/_jsx(HighlighContext.Provider, {
    value: value,
    children: children
  });
}