MWClash/lib/widgets/pop_scope.dart

import 'dart:async';

import 'package:fl_clash/state.dart';
import 'package:flutter/widgets.dart';

class CommonPopScope extends StatelessWidget {
  final Widget child;
  final FutureOr<bool> Function(BuildContext context)? onPop;
  final FutureOr<void> Function()? onPopSuccess;

  const CommonPopScope({
    super.key,
    required this.child,
    this.onPop,
    this.onPopSuccess,
  });

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: onPop == null ? true : false,
      onPopInvokedWithResult: onPop == null
          ? null
          : (didPop, _) async {
              if (didPop) {
                return;
              }
              final res = await onPop!(context);
              if (!context.mounted) {
                return;
              }
              if (!res) {
                return;
              }
              Navigator.of(context).pop();
              if (onPopSuccess != null) {
                await onPopSuccess!();
              }
            },
      child: child,
    );
  }
}

class SystemBackBlock extends StatefulWidget {
  final Widget child;

  const SystemBackBlock({super.key, required this.child});

  @override
  State<SystemBackBlock> createState() => _SystemBackBlockState();
}

class _SystemBackBlockState extends State<SystemBackBlock> {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      globalState.appController.backBlock();
    });
  }

  @override
  void dispose() {
    super.dispose();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      globalState.appController.unBackBlock();
    });
  }

  @override
  Widget build(BuildContext context) {
    return widget.child;
  }
}