Widget build()

in webview_flutter/step_12/lib/src/menu.dart [53:159]
107 lines of code
13 McCabe index (conditional complexity)

  Widget build(BuildContext context) {
    return FutureBuilder<WebViewController>(
      future: widget.controller.future,
      builder: (context, controller) {
        return PopupMenuButton<_MenuOptions>(
          onSelected: (value) async {
            switch (value) {
              case _MenuOptions.navigationDelegate:
                controller.data!.loadUrl('https://youtube.com');
                break;
              case _MenuOptions.userAgent:
                final userAgent = await controller.data!
                    .runJavascriptReturningResult('navigator.userAgent');
                ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                  content: Text(userAgent),
                ));
                break;
              case _MenuOptions.javascriptChannel:
                await controller.data!.runJavascript('''
var req = new XMLHttpRequest();
req.open('GET', "https://api.ipify.org/?format=json");
req.onload = function() {
  if (req.status == 200) {
    let response = JSON.parse(req.responseText);
    SnackBar.postMessage("IP Address: " + response.ip);
  } else {
    SnackBar.postMessage("Error: " + req.status);
  }
}
req.send();''');
                break;
              case _MenuOptions.clearCookies:
                _onClearCookies();
                break;
              case _MenuOptions.listCookies:
                _onListCookies(controller.data!);
                break;
              case _MenuOptions.addCookie:
                _onAddCookie(controller.data!);
                break;
              case _MenuOptions.setCookie:
                _onSetCookie(controller.data!);
                break;
              case _MenuOptions.removeCookie:
                _onRemoveCookie(controller.data!);
                break;
              case _MenuOptions.loadFlutterAsset:
                _onLoadFlutterAssetExample(controller.data!, context);
                break;
              case _MenuOptions.loadLocalFile:
                _onLoadLocalFileExample(controller.data!, context);
                break;
              case _MenuOptions.loadHtmlString:
                _onLoadHtmlStringExample(controller.data!, context);
                break;
            }
          },
          itemBuilder: (context) => [
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.navigationDelegate,
              child: Text('Navigate to YouTube'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.userAgent,
              child: Text('Show user-agent'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.javascriptChannel,
              child: Text('Lookup IP Address'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.clearCookies,
              child: Text('Clear cookies'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.listCookies,
              child: Text('List cookies'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.addCookie,
              child: Text('Add cookie'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.setCookie,
              child: Text('Set cookie'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.removeCookie,
              child: Text('Remove cookie'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.loadFlutterAsset,
              child: Text('Load Flutter Asset'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.loadHtmlString,
              child: Text('Load HTML string'),
            ),
            const PopupMenuItem<_MenuOptions>(
              value: _MenuOptions.loadLocalFile,
              child: Text('Load local file'),
            ),
          ],
        );
      },
    );
  }