| // Copyright 2014 The Flutter 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 'package:flutter/material.dart'; |
| import 'package:flutter/rendering.dart'; |
| import '../flutter_test_alternative.dart'; |
| |
| import 'rendering_tester.dart'; |
| |
| class TestTree { |
| TestTree() { |
| // incoming constraints are tight 800x600 |
| root = RenderPositionedBox( |
| child: RenderConstrainedBox( |
| additionalConstraints: const BoxConstraints.tightFor(width: 800.0), |
| // Place the child to be evaluated within both a repaint boundary and a |
| // layout-root element (in this case a tightly constrained box). Otherwise |
| // the act of transplanting the root into a new container will cause the |
| // relayout/repaint of the new parent node to satisfy the test. |
| child: RenderRepaintBoundary( |
| child: RenderConstrainedBox( |
| additionalConstraints: const BoxConstraints.tightFor(height: 20.0, width: 20.0), |
| child: RenderRepaintBoundary( |
| child: RenderCustomPaint( |
| painter: TestCallbackPainter( |
| onPaint: () { painted = true; }, |
| ), |
| child: RenderPositionedBox( |
| child: child = RenderConstrainedBox( |
| additionalConstraints: const BoxConstraints.tightFor(height: 20.0, width: 20.0), |
| child: RenderSemanticsAnnotations(label: 'Hello there foo', textDirection: TextDirection.ltr), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| } |
| RenderBox root; |
| RenderConstrainedBox child; |
| bool painted = false; |
| } |
| |
| class MutableCompositor extends RenderProxyBox { |
| MutableCompositor({ RenderBox child }) : super(child); |
| bool _alwaysComposite = false; |
| @override |
| bool get alwaysNeedsCompositing => _alwaysComposite; |
| } |
| |
| class TestCompositingBitsTree { |
| TestCompositingBitsTree() { |
| // incoming constraints are tight 800x600 |
| root = RenderPositionedBox( |
| child: RenderConstrainedBox( |
| additionalConstraints: const BoxConstraints.tightFor(width: 800.0), |
| // Place the child to be evaluated within a repaint boundary. Otherwise |
| // the act of transplanting the root into a new container will cause the |
| // repaint of the new parent node to satisfy the test. |
| child: RenderRepaintBoundary( |
| child: compositor = MutableCompositor( |
| child: RenderCustomPaint( |
| painter: TestCallbackPainter( |
| onPaint: () { painted = true; }, |
| ), |
| child: child = RenderConstrainedBox( |
| additionalConstraints: const BoxConstraints.tightFor(height: 20.0, width: 20.0) |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| } |
| RenderBox root; |
| MutableCompositor compositor; |
| RenderConstrainedBox child; |
| bool painted = false; |
| } |
| |
| void main() { |
| test('objects can be detached and re-attached: layout', () { |
| final TestTree testTree = TestTree(); |
| // Lay out |
| layout(testTree.root, phase: EnginePhase.layout); |
| expect(testTree.child.size, equals(const Size(20.0, 20.0))); |
| // Remove testTree from the custom render view |
| renderer.renderView.child = null; |
| expect(testTree.child.owner, isNull); |
| // Dirty one of the elements |
| testTree.child.additionalConstraints = |
| const BoxConstraints.tightFor(height: 5.0, width: 5.0); |
| // Lay out again |
| layout(testTree.root, phase: EnginePhase.layout); |
| expect(testTree.child.size, equals(const Size(5.0, 5.0))); |
| }); |
| test('objects can be detached and re-attached: compositingBits', () { |
| final TestCompositingBitsTree testTree = TestCompositingBitsTree(); |
| // Lay out, composite, and paint |
| layout(testTree.root, phase: EnginePhase.paint); |
| expect(testTree.painted, isTrue); |
| // Remove testTree from the custom render view |
| renderer.renderView.child = null; |
| expect(testTree.child.owner, isNull); |
| // Dirty one of the elements |
| testTree.compositor._alwaysComposite = true; |
| testTree.child.markNeedsCompositingBitsUpdate(); |
| testTree.painted = false; |
| // Lay out, composite, and paint again |
| layout(testTree.root, phase: EnginePhase.paint); |
| expect(testTree.painted, isTrue); |
| }); |
| test('objects can be detached and re-attached: paint', () { |
| final TestTree testTree = TestTree(); |
| // Lay out, composite, and paint |
| layout(testTree.root, phase: EnginePhase.paint); |
| expect(testTree.painted, isTrue); |
| // Remove testTree from the custom render view |
| renderer.renderView.child = null; |
| expect(testTree.child.owner, isNull); |
| // Dirty one of the elements |
| testTree.child.markNeedsPaint(); |
| testTree.painted = false; |
| // Lay out, composite, and paint again |
| layout(testTree.root, phase: EnginePhase.paint); |
| expect(testTree.painted, isTrue); |
| }); |
| test('objects can be detached and re-attached: semantics (no change)', () { |
| final TestTree testTree = TestTree(); |
| int semanticsUpdateCount = 0; |
| final SemanticsHandle semanticsHandle = renderer.pipelineOwner.ensureSemantics( |
| listener: () { |
| ++semanticsUpdateCount; |
| } |
| ); |
| // Lay out, composite, paint, and update semantics |
| layout(testTree.root, phase: EnginePhase.flushSemantics); |
| expect(semanticsUpdateCount, 1); |
| // Remove testTree from the custom render view |
| renderer.renderView.child = null; |
| expect(testTree.child.owner, isNull); |
| // Dirty one of the elements |
| semanticsUpdateCount = 0; |
| testTree.child.markNeedsSemanticsUpdate(); |
| expect(semanticsUpdateCount, 0); |
| // Lay out, composite, paint, and update semantics again |
| layout(testTree.root, phase: EnginePhase.flushSemantics); |
| expect(semanticsUpdateCount, 0); // no semantics have changed. |
| semanticsHandle.dispose(); |
| }); |
| test('objects can be detached and re-attached: semantics (with change)', () { |
| final TestTree testTree = TestTree(); |
| int semanticsUpdateCount = 0; |
| final SemanticsHandle semanticsHandle = renderer.pipelineOwner.ensureSemantics( |
| listener: () { |
| ++semanticsUpdateCount; |
| } |
| ); |
| // Lay out, composite, paint, and update semantics |
| layout(testTree.root, phase: EnginePhase.flushSemantics); |
| expect(semanticsUpdateCount, 1); |
| // Remove testTree from the custom render view |
| renderer.renderView.child = null; |
| expect(testTree.child.owner, isNull); |
| // Dirty one of the elements |
| semanticsUpdateCount = 0; |
| testTree.child.additionalConstraints = const BoxConstraints.tightFor(height: 20.0, width: 30.0); |
| testTree.child.markNeedsSemanticsUpdate(); |
| expect(semanticsUpdateCount, 0); |
| // Lay out, composite, paint, and update semantics again |
| layout(testTree.root, phase: EnginePhase.flushSemantics); |
| expect(semanticsUpdateCount, 1); // semantics have changed. |
| semanticsHandle.dispose(); |
| }); |
| } |