@pansy/react-mapbox-gl/es/components/Layer/layer.js

🌍 基于 Mapbox GL 封装的 React 组件库

// src/components/Layer/layer.tsx
import { useRef, useState, useMemo, useEffect } from "react";
import { createLayer, updateLayer } from "./utils";
import { useMap } from "../../hooks/useMap";
import { isStyleLoaded } from "../../utils/isStyleLoaded";
var layerCounter = 0;
var Layer = (props) => {
  const { map } = useMap();
  const propsRef = useRef(props);
  const [, setStyleLoaded] = useState(0);
  const id = useMemo(() => props.id || `jsx-layer-${layerCounter++}`, []);
  useEffect(() => {
    if (map) {
      const forceUpdate = () => setStyleLoaded((version) => version + 1);
      map.on("styledata", forceUpdate);
      forceUpdate();
      return () => {
        map.off("styledata", forceUpdate);
        if (isStyleLoaded(map) && map.getLayer(id)) {
          map.removeLayer(id);
        }
      };
    }
    return void 0;
  }, [map]);
  const layer = isStyleLoaded(map) && map.getLayer(id);
  if (layer) {
    try {
      updateLayer(map, id, props, propsRef.current);
    } catch (error) {
      console.warn(error);
    }
  } else {
    createLayer(map, id, props);
  }
  propsRef.current = props;
  return null;
};
export {
  Layer
};