react-bkoi-gl/dist/components/source.js

React components for Barikoi GL JS

import * as React from "react";
import { useContext, useEffect, useMemo, useState, useRef, cloneElement } from "react";
import { MapContext } from "./map.js";
import assert from "../utils/assert.js";
import { deepEqual } from "../utils/deep-equal.js";
let sourceCounter = 0;
function createSource(map, id, props) {
  if (map.style && map.style._loaded) {
    const options = {
      ...props
    };
    delete options.id;
    delete options.children;
    map.addSource(id, options);
    return map.getSource(id);
  }
  return null;
}
function updateSource(source, props, prevProps) {
  assert(props.id === prevProps.id, "source id changed");
  assert(props.type === prevProps.type, "source type changed");
  let changedKey = "";
  let changedKeyCount = 0;
  for (const key in props) {
    if (key !== "children" && key !== "id" && !deepEqual(prevProps[key], props[key])) {
      changedKey = key;
      changedKeyCount++;
    }
  }
  if (!changedKeyCount) {
    return;
  }
  const type = props.type;
  if (type === "geojson") {
    source.setData(props.data);
  } else if (type === "image") {
    source.updateImage({
      url: props.url,
      coordinates: props.coordinates
    });
  } else {
    switch (changedKey) {
      case "coordinates":
        source.setCoordinates?.(props.coordinates);
        break;
      case "url":
        source.setUrl?.(props.url);
        break;
      case "tiles":
        source.setTiles?.(props.tiles);
        break;
      default:
        console.warn(`Unable to update <Source> prop: ${changedKey}`);
    }
  }
}
export function Source(props) {
  const map = useContext(MapContext).map.getMap();
  const propsRef = useRef(props);
  const [, setStyleLoaded] = useState(0);
  const id = useMemo(() => props.id || `jsx-source-${sourceCounter++}`, []);
  useEffect(() => {
    if (map) {
      const forceUpdate = () => setTimeout(() => setStyleLoaded(version => version + 1), 0);
      map.on("styledata", forceUpdate);
      forceUpdate();
      return () => {
        map.off("styledata", forceUpdate);
        if (map.style && map.style._loaded && map.getSource(id)) {
          const allLayers = map.getStyle()?.layers;
          if (allLayers) {
            for (const layer of allLayers) {
              if (layer.source === id) {
                map.removeLayer(layer.id);
              }
            }
          }
          map.removeSource(id);
        }
      };
    }
    return undefined;
  }, [map]);
  let source = map && map.style && map.getSource(id);
  if (source) {
    updateSource(source, props, propsRef.current);
  } else {
    source = createSource(map, id, props);
  }
  propsRef.current = props;
  return source && React.Children.map(props.children, child => child && cloneElement(child, {
    source: id
  })) || null;
}
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