react-native-mapsforge-vtm/lib/module/components/LayerBitmapTile.js

React Native components to build vector maps using Mapsforges fork of vtm. Offline rendering of OpenStreetMap data. Android only

"use strict";

/**
 * External dependencies
 */
import { useEffect, useState } from 'react';

/**
 * Internal dependencies
 */
import useRefState from "../compose/useRefState.js";
import promiseQueue from "../promiseQueue.js";
import { MapLayerBitmapTileModule } from "../nativeMapModules.js";
const Module = MapLayerBitmapTileModule;
const LayerBitmapTile = ({
  nativeNodeHandle,
  reactTreeIndex,
  url = 'https://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
  alpha = 1,
  zoomMin = 1,
  zoomMax = 20,
  enabledZoomMin = 1,
  enabledZoomMax = 20,
  cacheSize = 0,
  cacheDirBase = '/',
  // if `/`, will fallback to java getReactApplicationContext().getCacheDir();
  cacheDirChild = '',
  // if ``, will fallback to slugify url;
  onCreate,
  onRemove,
  onChange,
  onError
}) => {
  // @ts-ignore
  const [random, setRandom] = useState(0);
  const [uuid, setUuid] = useRefState(null);
  const [triggerCreateNew, setTriggerCreateNew] = useState(null);
  const createLayer = () => {
    setUuid(false);
    promiseQueue.enqueue(() => {
      return Module.createLayer(nativeNodeHandle, url, alpha,
      // The BitmapTileLayer will ensure its between 0 and 1.
      Math.round(zoomMin), Math.round(zoomMax), Math.round(enabledZoomMin), Math.round(enabledZoomMax), Math.round(cacheSize), cacheDirBase.trim(), cacheDirChild.trim(), reactTreeIndex).then(response => {
        setUuid(response.uuid);
        setRandom(Math.random());
        null === triggerCreateNew ? onCreate ? onCreate(response) : null : onChange ? onChange(response) : null;
      }).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    });
  };
  useEffect(() => {
    if (uuid === null && nativeNodeHandle) {
      createLayer();
    }
    return () => {
      if (uuid && nativeNodeHandle) {
        promiseQueue.enqueue(() => {
          return Module.removeLayer(nativeNodeHandle, uuid).then(removedUuid => {
            onRemove ? onRemove({
              uuid: removedUuid
            }) : null;
          }).catch(err => {
            console.log('ERROR', err);
            onError ? onError(err) : null;
          });
        });
      }
    };
  }, [nativeNodeHandle, !!uuid]);

  // enabledZoomMin enabledZoomMax changed.
  useEffect(() => {
    if (nativeNodeHandle && uuid) {
      Module.updateEnabledZoomMinMax(nativeNodeHandle, uuid, Math.round(enabledZoomMin), Math.round(enabledZoomMax)).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    }
  }, [enabledZoomMin, enabledZoomMax]);
  useEffect(() => {
    if (nativeNodeHandle && uuid) {
      Module.setAlpha(nativeNodeHandle, uuid, alpha).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    }
  }, [alpha]);
  useEffect(() => {
    if (nativeNodeHandle && uuid) {
      promiseQueue.enqueue(() => {
        return Module.removeLayer(nativeNodeHandle, uuid).then(() => {
          setUuid(null);
          setTriggerCreateNew(Math.random());
        }).catch(err => {
          console.log('ERROR', err);
          onError ? onError(err) : null;
        });
      });
    }
  }, [url, zoomMin, zoomMax, cacheSize, cacheDirBase, cacheDirChild]);
  return null;
};
LayerBitmapTile.isMapLayer = true;
export default LayerBitmapTile;
//# sourceMappingURL=LayerBitmapTile.js.map