react-bkoi-gl/dist/components/use-control.js

React components for Barikoi GL JS

import { useContext, useMemo, useEffect } from "react";
import { MapContext } from "./map.js";
export function useControl(onCreate, arg1, arg2, arg3) {
  const context = useContext(MapContext);
  const ctrl = useMemo(() => onCreate(context), []);
  useEffect(() => {
    const opts = arg3 || arg2 || arg1;
    const onAdd = typeof arg1 === "function" && typeof arg2 === "function" ? arg1 : null;
    const onRemove = typeof arg2 === "function" ? arg2 : typeof arg1 === "function" ? arg1 : null;
    const {
      map
    } = context;
    if (!map.hasControl(ctrl)) {
      map.addControl(ctrl, opts?.position);
      if (onAdd) {
        onAdd(context);
      }
    }
    return () => {
      if (onRemove) {
        onRemove(context);
      }
      if (map.hasControl(ctrl)) {
        map.removeControl(ctrl);
      }
    };
  }, []);
  return ctrl;
}
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