src/ui/tests/e2e_flutter_tests/embedder/parent-view/parent_view.dart

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:ui';
import 'package:flutter/material.dart';

import 'package:args/args.dart';
import 'package:fidl_fuchsia_sys/fidl_async.dart';
import 'package:fidl_fuchsia_ui_app/fidl_async.dart';
import 'package:fidl_fuchsia_ui_views/fidl_async.dart';
import 'package:fuchsia_scenic_flutter/child_view.dart';
import 'package:fuchsia_scenic_flutter/child_view_connection.dart';
import 'package:fuchsia_services/services.dart';
import 'package:zircon/zircon.dart';

const _kChildAppUrl =
    'fuchsia-pkg://fuchsia.com/child-view#meta/child-view.cmx';

Future<void> main(List<String> args) async {
  WidgetsFlutterBinding.ensureInitialized();
  final parser = ArgParser()
    ..addFlag('showOverlay', defaultsTo: false)
    ..addFlag('hitTestable', defaultsTo: true)
    ..addFlag('focusable', defaultsTo: true)
    ..addFlag('usePlatformView', defaultsTo: true);
  final arguments = parser.parse(args);
  for (final option in arguments.options) {
    print('parent-view: $option: ${arguments[option]}');
  }

  final childViewToken = _launchApp(_kChildAppUrl);
  final connection = ChildViewConnection(
    childViewToken,
    usePlatformView: arguments['usePlatformView'],
  );

  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    home: TestApp(
      connection,
      showOverlay: arguments['showOverlay'],
      hitTestable: arguments['hitTestable'],
      focusable: arguments['focusable'],
    ),
  ));
}

class TestApp extends StatelessWidget {
  static const _black = Color.fromARGB(255, 0, 0, 0);
  static const _blue = Color.fromARGB(255, 0, 0, 255);

  final ChildViewConnection connection;
  final bool showOverlay;
  final bool hitTestable;
  final bool focusable;

  final _backgroundColor = ValueNotifier(_blue);

  TestApp(
    this.connection, {
    this.showOverlay = false,
    this.hitTestable = true,
    this.focusable = true,
  });

  @override
  Widget build(BuildContext context) {
    return Listener(
      onPointerDown: (_) => _backgroundColor.value = _black,
      child: AnimatedBuilder(
          animation: _backgroundColor,
          builder: (context, snapshot) {
            return Container(
              color: _backgroundColor.value,
              child: Stack(
                alignment: Alignment.center,
                children: [
                  SizedBox(
                    width: 200,
                    height: 200,
                    child: ChildView(
                      connection: connection,
                      hitTestable: hitTestable,
                      focusable: focusable,
                    ),
                  ),
                  if (showOverlay)
                    Container(
                      margin: EdgeInsets.only(left: 200, bottom: 200),
                      width: 200,
                      height: 200,
                      color: Color.fromARGB(255, 0, 255, 0),
                    ),
                ],
              ),
            );
          }),
    );
  }
}

ViewHolderToken _launchApp(String componentUrl) {
  final incoming = Incoming();
  final componentController = ComponentControllerProxy();

  final launcher = LauncherProxy();
  StartupContext.fromStartupInfo().incoming.connectToService(launcher);
  launcher.createComponent(
    LaunchInfo(
      url: componentUrl,
      directoryRequest: incoming.request().passChannel(),
    ),
    componentController.ctrl.request(),
  );
  launcher.ctrl.close();

  ViewProviderProxy viewProvider = ViewProviderProxy();
  incoming
    ..connectToService(viewProvider)
    ..close();

  final viewTokens = EventPairPair();
  assert(viewTokens.status == ZX.OK);
  final viewHolderToken = ViewHolderToken(value: viewTokens.first);
  final viewToken = ViewToken(value: viewTokens.second);

  viewProvider.createView(viewToken.value, null, null);
  viewProvider.ctrl.close();

  return viewHolderToken;
}