54 lines
1.3 KiB
Dart
54 lines
1.3 KiB
Dart
import 'package:collection/collection.dart';
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import 'package:flutter/widgets.dart';
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// this widget combines multiple pop handlers with a guaranteed order
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class AvesPopScope extends StatelessWidget {
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final List<PopHandler> handlers;
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final Widget child;
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const AvesPopScope({
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super.key,
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required this.handlers,
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required this.child,
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});
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@override
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Widget build(BuildContext context) {
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final blocker = handlers.firstWhereOrNull((v) => !v.canPop(context));
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return PopScope(
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canPop: blocker == null,
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onPopInvoked: (didPop) {
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if (!didPop) {
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blocker?.onPopBlocked(context);
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}
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},
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child: child,
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);
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}
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}
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abstract class PopHandler {
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bool canPop(BuildContext context);
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void onPopBlocked(BuildContext context);
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}
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class APopHandler implements PopHandler {
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final bool Function(BuildContext context) _canPop;
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final void Function(BuildContext context) _onPopBlocked;
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APopHandler({
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required bool Function(BuildContext context) canPop,
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required void Function(BuildContext context) onPopBlocked,
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}) : _canPop = canPop,
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_onPopBlocked = onPopBlocked;
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@override
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bool canPop(BuildContext context) => _canPop(context);
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@override
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void onPopBlocked(BuildContext context) => _onPopBlocked(context);
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}
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@immutable
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class PopExitNotification extends Notification {}
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