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WIP Commits separated as follows: - Update lints in analysis_options files - Run `dart fix --apply` - Clean up leftover analysis issues - Run `dart format .` in the right places. Local analysis and testing passes. Checking CI now. Part of https://github.com/flutter/flutter/issues/178827 - Adoption of flutter_lints in examples/api coming in a separate change (cc @loic-sharma) ## Pre-launch Checklist - [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [ ] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [ ] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [ ] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
556 lines
35 KiB
Dart
556 lines
35 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:io' show Platform;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class Leaf extends StatefulWidget {
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const Leaf({super.key, required this.child});
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final Widget child;
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@override
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State<Leaf> createState() => _LeafState();
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}
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class _LeafState extends State<Leaf> {
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bool _keepAlive = false;
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void setKeepAlive(bool value) {
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setState(() {
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_keepAlive = value;
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});
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}
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@override
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Widget build(BuildContext context) {
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return KeepAlive(keepAlive: _keepAlive, child: widget.child);
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}
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}
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List<Widget> generateList(Widget child) {
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return List<Widget>.generate(
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100,
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(int index) => Leaf(key: GlobalObjectKey<_LeafState>(index), child: child),
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growable: false,
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);
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}
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void main() {
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test('KeepAlive debugTypicalAncestorWidgetClass', () {
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final keepAlive = KeepAlive(keepAlive: false, child: Container());
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expect(
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keepAlive.debugTypicalAncestorWidgetDescription,
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'SliverWithKeepAliveWidget or TwoDimensionalViewport',
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);
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});
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testWidgets('KeepAlive with ListView with itemExtent', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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cacheExtent: 0.0,
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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itemExtent: 12.3, // about 50 widgets visible
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children: generateList(const Placeholder()),
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(ListView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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testWidgets('KeepAlive with ListView without itemExtent', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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cacheExtent: 0.0,
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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children: generateList(
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const SizedBox(height: 12.3, child: Placeholder()),
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), // about 50 widgets visible
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(ListView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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testWidgets('KeepAlive with GridView', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: GridView.count(
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cacheExtent: 0.0,
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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crossAxisCount: 2,
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childAspectRatio: 400.0 / 24.6, // about 50 widgets visible
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children: generateList(const Placeholder()),
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(GridView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(GridView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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testWidgets('KeepAlive render tree description', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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itemExtent: 400.0, // 2 visible children
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children: generateList(const Placeholder()),
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),
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),
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);
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// The important lines below are the ones marked with "<----"
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expect(
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tester.binding.renderView.toStringDeep(minLevel: DiagnosticLevel.info, wrapWidth: 600),
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equalsIgnoringHashCodes(
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'_ReusableRenderView#00000\n'
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' │ debug mode enabled - ${Platform.operatingSystem}\n'
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' │ view size: Size(2400.0, 1800.0) (in physical pixels)\n'
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' │ device pixel ratio: 3.0 (physical pixels per logical pixel)\n'
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' │ configuration: BoxConstraints(w=800.0, h=600.0) at 3.0x (in logical pixels)\n'
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' │\n'
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' └─child: RenderRepaintBoundary#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none>\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ layer: OffsetLayer#00000\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ metrics: 0.0% useful (1 bad vs 0 good)\n'
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' │ diagnosis: insufficient data to draw conclusion (less than five repaints)\n'
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' │\n'
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' └─child: RenderCustomPaint#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ painter: null\n'
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' │ foregroundPainter: _GlowingOverscrollIndicatorPainter(_GlowController(color: ${const Color(0xffffffff)}, axis: vertical), _GlowController(color: ${const Color(0xffffffff)}, axis: vertical))\n'
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' │\n'
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' └─child: RenderRepaintBoundary#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ layer: OffsetLayer#00000\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ metrics: 0.0% useful (1 bad vs 0 good)\n'
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' │ diagnosis: insufficient data to draw conclusion (less than five repaints)\n'
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' │\n'
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' └─child: _RenderScrollSemantics#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ semantics node: SemanticsNode#1\n'
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' │ semantic boundary\n'
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' │ size: Size(800.0, 600.0)\n'
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' │\n'
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' └─child: RenderPointerListener#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ behavior: deferToChild\n'
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' │ listeners: signal\n'
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' │\n'
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' └─child: RenderSemanticsGestureHandler#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ behavior: opaque\n'
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' │ gestures: vertical scroll\n'
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' │\n'
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' └─child: RenderPointerListener#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ behavior: opaque\n'
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' │ listeners: down, panZoomStart\n'
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' │\n'
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' └─child: RenderSemanticsAnnotations#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │\n'
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' └─child: RenderIgnorePointer#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ ignoring: false\n'
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' │ ignoringSemantics: null\n'
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' │\n'
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' └─child: RenderViewport#00000\n'
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' │ needs compositing\n'
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' │ parentData: <none> (can use size)\n'
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' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
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' │ layer: OffsetLayer#00000\n'
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' │ size: Size(800.0, 600.0)\n'
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' │ axisDirection: down\n'
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' │ crossAxisDirection: right\n'
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' │ offset: ScrollPositionWithSingleContext#00000(offset: 0.0, range: 0.0..39400.0, viewport: 600.0, ScrollableState, AlwaysScrollableScrollPhysics -> ClampingScrollPhysics -> RangeMaintainingScrollPhysics, IdleScrollActivity#00000, ScrollDirection.idle)\n'
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' │ anchor: 0.0\n'
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' │\n'
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' └─center child: RenderSliverPadding#00000 relayoutBoundary=up1\n'
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' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n'
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' │ constraints: SliverConstraints(AxisDirection.down, GrowthDirection.forward, ScrollDirection.idle, scrollOffset: 0.0, precedingScrollExtent: 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0, crossAxisDirection: AxisDirection.right, viewportMainAxisExtent: 600.0, remainingCacheExtent: 850.0, cacheOrigin: 0.0)\n'
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' │ geometry: SliverGeometry(scrollExtent: 40000.0, paintExtent: 600.0, maxPaintExtent: 40000.0, hasVisualOverflow: true, cacheExtent: 850.0)\n'
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' │ padding: EdgeInsets.zero\n'
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' │ textDirection: ltr\n'
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' │\n'
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' └─child: RenderSliverFixedExtentList#00000 relayoutBoundary=up2\n'
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' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n'
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' │ constraints: SliverConstraints(AxisDirection.down, GrowthDirection.forward, ScrollDirection.idle, scrollOffset: 0.0, precedingScrollExtent: 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0, crossAxisDirection: AxisDirection.right, viewportMainAxisExtent: 600.0, remainingCacheExtent: 850.0, cacheOrigin: 0.0)\n'
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' │ geometry: SliverGeometry(scrollExtent: 40000.0, paintExtent: 600.0, maxPaintExtent: 40000.0, hasVisualOverflow: true, cacheExtent: 850.0)\n'
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' │ currently live children: 0 to 2\n'
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' │\n'
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' ├─child with index 0: RenderLimitedBox#00000\n'
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' │ │ parentData: index=0; layoutOffset=0.0\n'
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' │ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
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' │ │ size: Size(800.0, 400.0)\n'
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' │ │ maxWidth: 400.0\n'
|
|
' │ │ maxHeight: 400.0\n'
|
|
' │ │\n'
|
|
' │ └─child: RenderCustomPaint#00000\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ painter: _PlaceholderPainter#00000()\n'
|
|
' │ preferredSize: Size(Infinity, Infinity)\n'
|
|
' │\n'
|
|
' ├─child with index 1: RenderLimitedBox#00000\n' // <----- no dashed line starts here
|
|
' │ │ parentData: index=1; layoutOffset=400.0\n'
|
|
' │ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ │ size: Size(800.0, 400.0)\n'
|
|
' │ │ maxWidth: 400.0\n'
|
|
' │ │ maxHeight: 400.0\n'
|
|
' │ │\n'
|
|
' │ └─child: RenderCustomPaint#00000\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ painter: _PlaceholderPainter#00000()\n'
|
|
' │ preferredSize: Size(Infinity, Infinity)\n'
|
|
' │\n'
|
|
' └─child with index 2: RenderLimitedBox#00000 NEEDS-PAINT\n'
|
|
' │ parentData: index=2; layoutOffset=800.0\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ maxWidth: 400.0\n'
|
|
' │ maxHeight: 400.0\n'
|
|
' │\n'
|
|
' └─child: RenderCustomPaint#00000 NEEDS-PAINT\n'
|
|
' parentData: <none> (can use size)\n'
|
|
' constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' size: Size(800.0, 400.0)\n'
|
|
' painter: _PlaceholderPainter#00000()\n'
|
|
' preferredSize: Size(Infinity, Infinity)\n',
|
|
),
|
|
);
|
|
const GlobalObjectKey<_LeafState>(0).currentState!.setKeepAlive(true);
|
|
await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0));
|
|
await tester.pump();
|
|
const GlobalObjectKey<_LeafState>(3).currentState!.setKeepAlive(true);
|
|
await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0));
|
|
await tester.pump();
|
|
expect(
|
|
tester.binding.renderView.toStringDeep(minLevel: DiagnosticLevel.info, wrapWidth: 600),
|
|
equalsIgnoringHashCodes(
|
|
'_ReusableRenderView#00000\n'
|
|
' │ debug mode enabled - ${Platform.operatingSystem}\n'
|
|
' │ view size: Size(2400.0, 1800.0) (in physical pixels)\n'
|
|
' │ device pixel ratio: 3.0 (physical pixels per logical pixel)\n'
|
|
' │ configuration: BoxConstraints(w=800.0, h=600.0) at 3.0x (in logical pixels)\n'
|
|
' │\n'
|
|
' └─child: RenderRepaintBoundary#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none>\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ layer: OffsetLayer#00000\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ metrics: 0.0% useful (1 bad vs 0 good)\n'
|
|
' │ diagnosis: insufficient data to draw conclusion (less than five repaints)\n'
|
|
' │\n'
|
|
' └─child: RenderCustomPaint#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ painter: null\n'
|
|
' │ foregroundPainter: _GlowingOverscrollIndicatorPainter(_GlowController(color: ${const Color(0xffffffff)}, axis: vertical), _GlowController(color: ${const Color(0xffffffff)}, axis: vertical))\n'
|
|
' │\n'
|
|
' └─child: RenderRepaintBoundary#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ layer: OffsetLayer#00000\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ metrics: 0.0% useful (1 bad vs 0 good)\n'
|
|
' │ diagnosis: insufficient data to draw conclusion (less than five repaints)\n'
|
|
' │\n'
|
|
' └─child: _RenderScrollSemantics#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ semantics node: SemanticsNode#1\n'
|
|
' │ semantic boundary\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │\n'
|
|
' └─child: RenderPointerListener#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ behavior: deferToChild\n'
|
|
' │ listeners: signal\n'
|
|
' │\n'
|
|
' └─child: RenderSemanticsGestureHandler#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ behavior: opaque\n'
|
|
' │ gestures: vertical scroll\n'
|
|
' │\n'
|
|
' └─child: RenderPointerListener#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ behavior: opaque\n'
|
|
' │ listeners: down, panZoomStart\n'
|
|
' │\n'
|
|
' └─child: RenderSemanticsAnnotations#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │\n'
|
|
' └─child: RenderIgnorePointer#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ ignoring: false\n'
|
|
' │ ignoringSemantics: null\n'
|
|
' │\n'
|
|
' └─child: RenderViewport#00000\n'
|
|
' │ needs compositing\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
|
|
' │ layer: OffsetLayer#00000\n'
|
|
' │ size: Size(800.0, 600.0)\n'
|
|
' │ axisDirection: down\n'
|
|
' │ crossAxisDirection: right\n'
|
|
' │ offset: ScrollPositionWithSingleContext#00000(offset: 2000.0, range: 0.0..39400.0, viewport: 600.0, ScrollableState, AlwaysScrollableScrollPhysics -> ClampingScrollPhysics -> RangeMaintainingScrollPhysics, IdleScrollActivity#00000, ScrollDirection.idle)\n'
|
|
' │ anchor: 0.0\n'
|
|
' │\n'
|
|
' └─center child: RenderSliverPadding#00000 relayoutBoundary=up1\n'
|
|
' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n'
|
|
' │ constraints: SliverConstraints(AxisDirection.down, GrowthDirection.forward, ScrollDirection.idle, scrollOffset: 2000.0, precedingScrollExtent: 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0, crossAxisDirection: AxisDirection.right, viewportMainAxisExtent: 600.0, remainingCacheExtent: 1100.0, cacheOrigin: -250.0)\n'
|
|
' │ geometry: SliverGeometry(scrollExtent: 40000.0, paintExtent: 600.0, maxPaintExtent: 40000.0, hasVisualOverflow: true, cacheExtent: 1100.0)\n'
|
|
' │ padding: EdgeInsets.zero\n'
|
|
' │ textDirection: ltr\n'
|
|
' │\n'
|
|
' └─child: RenderSliverFixedExtentList#00000 relayoutBoundary=up2\n'
|
|
' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n'
|
|
' │ constraints: SliverConstraints(AxisDirection.down, GrowthDirection.forward, ScrollDirection.idle, scrollOffset: 2000.0, precedingScrollExtent: 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0, crossAxisDirection: AxisDirection.right, viewportMainAxisExtent: 600.0, remainingCacheExtent: 1100.0, cacheOrigin: -250.0)\n'
|
|
' │ geometry: SliverGeometry(scrollExtent: 40000.0, paintExtent: 600.0, maxPaintExtent: 40000.0, hasVisualOverflow: true, cacheExtent: 1100.0)\n'
|
|
' │ currently live children: 4 to 7\n'
|
|
' │\n'
|
|
' ├─child with index 4: RenderLimitedBox#00000 NEEDS-PAINT\n'
|
|
' │ │ parentData: index=4; layoutOffset=1600.0\n'
|
|
' │ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ │ size: Size(800.0, 400.0)\n'
|
|
' │ │ maxWidth: 400.0\n'
|
|
' │ │ maxHeight: 400.0\n'
|
|
' │ │\n'
|
|
' │ └─child: RenderCustomPaint#00000 NEEDS-PAINT\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ painter: _PlaceholderPainter#00000()\n'
|
|
' │ preferredSize: Size(Infinity, Infinity)\n'
|
|
' │\n'
|
|
' ├─child with index 5: RenderLimitedBox#00000\n' // <----- this is index 5, not 0
|
|
' │ │ parentData: index=5; layoutOffset=2000.0\n'
|
|
' │ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ │ size: Size(800.0, 400.0)\n'
|
|
' │ │ maxWidth: 400.0\n'
|
|
' │ │ maxHeight: 400.0\n'
|
|
' │ │\n'
|
|
' │ └─child: RenderCustomPaint#00000\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ painter: _PlaceholderPainter#00000()\n'
|
|
' │ preferredSize: Size(Infinity, Infinity)\n'
|
|
' │\n'
|
|
' ├─child with index 6: RenderLimitedBox#00000\n'
|
|
' │ │ parentData: index=6; layoutOffset=2400.0\n'
|
|
' │ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ │ size: Size(800.0, 400.0)\n'
|
|
' │ │ maxWidth: 400.0\n'
|
|
' │ │ maxHeight: 400.0\n'
|
|
' │ │\n'
|
|
' │ └─child: RenderCustomPaint#00000\n'
|
|
' │ parentData: <none> (can use size)\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ painter: _PlaceholderPainter#00000()\n'
|
|
' │ preferredSize: Size(Infinity, Infinity)\n'
|
|
' │\n'
|
|
' ├─child with index 7: RenderLimitedBox#00000 NEEDS-PAINT\n'
|
|
' ╎ │ parentData: index=7; layoutOffset=2800.0\n'
|
|
' ╎ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' ╎ │ size: Size(800.0, 400.0)\n'
|
|
' ╎ │ maxWidth: 400.0\n'
|
|
' ╎ │ maxHeight: 400.0\n'
|
|
' ╎ │\n'
|
|
' ╎ └─child: RenderCustomPaint#00000 NEEDS-PAINT\n'
|
|
' ╎ parentData: <none> (can use size)\n'
|
|
' ╎ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' ╎ size: Size(800.0, 400.0)\n'
|
|
' ╎ painter: _PlaceholderPainter#00000()\n'
|
|
' ╎ preferredSize: Size(Infinity, Infinity)\n'
|
|
' ╎\n'
|
|
' ╎╌child with index 0 (kept alive but not laid out): RenderLimitedBox#00000\n' // <----- this one is index 0 and is marked as being kept alive but not laid out
|
|
' ╎ │ parentData: index=0; keepAlive; layoutOffset=0.0\n'
|
|
' ╎ │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' ╎ │ size: Size(800.0, 400.0)\n'
|
|
' ╎ │ maxWidth: 400.0\n'
|
|
' ╎ │ maxHeight: 400.0\n'
|
|
' ╎ │\n'
|
|
' ╎ └─child: RenderCustomPaint#00000\n'
|
|
' ╎ parentData: <none> (can use size)\n'
|
|
' ╎ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' ╎ size: Size(800.0, 400.0)\n'
|
|
' ╎ painter: _PlaceholderPainter#00000()\n'
|
|
' ╎ preferredSize: Size(Infinity, Infinity)\n'
|
|
' ╎\n'
|
|
' └╌child with index 3 (kept alive but not laid out): RenderLimitedBox#00000\n'
|
|
' │ parentData: index=3; keepAlive; layoutOffset=1200.0\n'
|
|
' │ constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' │ size: Size(800.0, 400.0)\n'
|
|
' │ maxWidth: 400.0\n'
|
|
' │ maxHeight: 400.0\n'
|
|
' │\n'
|
|
' └─child: RenderCustomPaint#00000\n'
|
|
' parentData: <none> (can use size)\n'
|
|
' constraints: BoxConstraints(w=800.0, h=400.0)\n'
|
|
' size: Size(800.0, 400.0)\n'
|
|
' painter: _PlaceholderPainter#00000()\n'
|
|
' preferredSize: Size(Infinity, Infinity)\n',
|
|
),
|
|
);
|
|
}, skip: kIsWeb); // https://github.com/flutter/flutter/issues/87876
|
|
}
|