Function useMapInstance

src/components/map/use-map-instance.ts:53–249

(
  props: MapProps,
  context: APIProviderContextValue
)

 * @internal
 */
export function useMapInstance(
  props: MapProps,
  context: APIProviderContextValue
): readonly [
  map: google.maps.Map | null,
  containerRef: Ref<HTMLDivElement>,
  cameraStateRef: CameraStateRef
] {
  const apiIsLoaded = useApiIsLoaded();
  const [map, setMap] = useState<google.maps.Map | null>(null);
  const [container, containerRef] = useCallbackRef<HTMLDivElement>();

  const cameraStateRef = useTrackedCameraStateRef(map);

  const {
    id,
    defaultBounds,
    defaultCenter,
    defaultZoom,
    defaultHeading,
    defaultTilt,
    reuseMaps,
    renderingType,
    colorScheme,

    ...mapOptions
  } = props;

  const hasZoom = props.zoom !== undefined || props.defaultZoom !== undefined;
  const hasCenter =
    props.center !== undefined || props.defaultCenter !== undefined;

  if (!defaultBounds && (!hasZoom || !hasCenter)) {
    console.warn(
      '<Map> component is missing configuration. ' +
        'You have to provide zoom and center (via the `zoom`/`defaultZoom` and ' +
        '`center`/`defaultCenter` props) or specify the region to show using ' +
        '`defaultBounds`. See ' +
        'https://visgl.github.io/react-google-maps/docs/api-reference/components/map#required'
    );
  }

  // apply default camera props if available and not overwritten by controlled props
  if (!mapOptions.center && defaultCenter) mapOptions.center = defaultCenter;
  if (!mapOptions.zoom && Number.isFinite(defaultZoom))
    mapOptions.zoom = defaultZoom;
  if (!mapOptions.heading && Number.isFinite(defaultHeading))
    mapOptions.heading = defaultHeading;
  if (!mapOptions.tilt && Number.isFinite(defaultTilt))
    mapOptions.tilt = defaultTilt;

  // Handle internalUsageAttributionIds
  const customIds = mapOptions.internalUsageAttributionIds;

  if (customIds == null) {
    // Not specified - use context default (which may be null if disabled)
    mapOptions.internalUsageAttributionIds =
      context.internalUsageAttributionIds;