class WebMenuContentViewer extends StatefulWidget {
  final String _webUrl;

  WebMenuContentViewer(this._webUrl);

  @override
  _WebMenuContentViewerState createState() => _WebMenuContentViewerState();
}

class _WebMenuContentViewerState extends State<WebMenuContentViewer> {
  MarkModeBloc _bloc;

  Completer<WebViewController> _controller = Completer<WebViewController>();

  @override
  Widget build(BuildContext context) {
    return Expanded(
        child: StreamBuilder(
            stream: _bloc.state,
            initialData: MarkModeState.navigateMode(),
            builder: (BuildContext context, AsyncSnapshot<MarkModeState>snapshot) {
              return Visibility(
                visible: snapshot.data.isNavigateMode() == true,
                child: WebView(
                  initialUrl: widget._webUrl,
                  onWebViewCreated: (WebViewController webViewController) {
                    if(_controller.isCompleted == false)
                      _controller.complete(webViewController);
                  },),
              );
            }
        ),
    );
  }

  @override
  void initState() {
    super.initState();
    _bloc = BlocProvider.of<MarkModeBloc>(context);
  }