of<T extends INuRouter> static method

NuvigatorState<T>? of<T extends INuRouter>(BuildContext context, { bool rootNuvigator = false, bool nullOk = false, })

Fetches a NuvigatorState from the current BuildContext.

Implementation

static NuvigatorState<T>? of<T extends INuRouter>(
  BuildContext context, {
  bool rootNuvigator = false,
  bool nullOk = false,
}) {
  if (rootNuvigator) {
    return context.findRootAncestorStateOfType<NuvigatorState<T>>();
  } else {
    final closestNuvigator =
        context.findAncestorStateOfType<NuvigatorState<T>>();
    if (closestNuvigator != null) return closestNuvigator;
    assert(() {
      if (!nullOk) {
        throw FlutterError(
            'Nuvigator operation requested with a context that does not include a Nuvigator.\n'
            'The context used to push or pop routes from the Nuvigator must be that of a '
            'widget that is a descendant of a Nuvigator widget.'
            'Also check if the provided Router [T] type exists withing a the Nuvigator context.');
      }
      return true;
    }());
    return null;
  }
}