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// 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/foundation.dart';
import 'package:flutter/rendering.dart';
import '../flutter_test_alternative.dart';
import 'rendering_tester.dart';
void main() {
test('nested repaint boundaries - smoke test', () {
RenderOpacity a, b, c;
a = RenderOpacity(
opacity: 1.0,
child: RenderRepaintBoundary(
child: b = RenderOpacity(
opacity: 1.0,
child: RenderRepaintBoundary(
child: c = RenderOpacity(
opacity: 1.0
)
),
),
),
);
layout(a, phase: EnginePhase.flushSemantics);
c.opacity = 0.9;
pumpFrame(phase: EnginePhase.flushSemantics);
a.opacity = 0.8;
c.opacity = 0.8;
pumpFrame(phase: EnginePhase.flushSemantics);
a.opacity = 0.7;
b.opacity = 0.7;
c.opacity = 0.7;
pumpFrame(phase: EnginePhase.flushSemantics);
});
test('Repaint boundary can get new parent after markNeedsCompositingBitsUpdate', () {
// Regression test for https://github.com/flutter/flutter/issues/24029.
final RenderRepaintBoundary repaintBoundary = RenderRepaintBoundary();
layout(repaintBoundary, phase: EnginePhase.flushSemantics);
repaintBoundary.markNeedsCompositingBitsUpdate();
renderer.renderView.child = null;
final RenderPadding padding = RenderPadding(
padding: const EdgeInsets.all(50),
);
renderer.renderView.child = padding;
padding.child = repaintBoundary;
pumpFrame(phase: EnginePhase.flushSemantics);
});
test('Framework creates an OffsetLayer for a repaint boundary', () {
final _TestRepaintBoundary repaintBoundary = _TestRepaintBoundary();
final RenderOpacity opacity = RenderOpacity(
opacity: 1.0,
child: repaintBoundary,
);
layout(opacity, phase: EnginePhase.flushSemantics);
expect(repaintBoundary.debugLayer, isA<OffsetLayer>());
});
test('Framework does not create an OffsetLayer for a non-repaint boundary', () {
final _TestNonCompositedBox nonCompositedBox = _TestNonCompositedBox();
final RenderOpacity opacity = RenderOpacity(
opacity: 1.0,
child: nonCompositedBox,
);
layout(opacity, phase: EnginePhase.flushSemantics);
expect(nonCompositedBox.debugLayer, null);
});
test('Framework allows a non-repaint boundary to create own layer', () {
final _TestCompositedBox compositedBox = _TestCompositedBox();
final RenderOpacity opacity = RenderOpacity(
opacity: 1.0,
child: compositedBox,
);
layout(opacity, phase: EnginePhase.flushSemantics);
expect(compositedBox.debugLayer, isA<OpacityLayer>());
});
test('Framework ensures repaint boundary layer is not overwritten', () {
final _TestRepaintBoundaryThatOverwritesItsLayer faultyRenderObject = _TestRepaintBoundaryThatOverwritesItsLayer();
final RenderOpacity opacity = RenderOpacity(
opacity: 1.0,
child: faultyRenderObject,
);
FlutterErrorDetails error;
layout(opacity, phase: EnginePhase.flushSemantics, onErrors: () {
error = renderer.takeFlutterErrorDetails();
});
expect('${error.exception}', contains('Attempted to set a layer to a repaint boundary render object.'));
});
}
// A plain render object that's a repaint boundary.
class _TestRepaintBoundary extends RenderBox {
@override
bool get isRepaintBoundary => true;
@override
void performLayout() {
size = constraints.smallest;
}
}
// A render object that's a repaint boundary and (incorrectly) creates its own layer.
class _TestRepaintBoundaryThatOverwritesItsLayer extends RenderBox {
@override
bool get isRepaintBoundary => true;
@override
void performLayout() {
size = constraints.smallest;
}
@override
void paint(PaintingContext context, Offset offset) {
layer = OpacityLayer(alpha: 50);
}
}
// A render object that's neither a repaint boundary nor creates its own layer.
class _TestNonCompositedBox extends RenderBox {
@override
bool get isRepaintBoundary => false;
@override
void performLayout() {
size = constraints.smallest;
}
}
// A render object that's not a repaint boundary but creates its own layer.
class _TestCompositedBox extends RenderBox {
@override
bool get isRepaintBoundary => false;
@override
void performLayout() {
size = constraints.smallest;
}
@override
void paint(PaintingContext context, Offset offset) {
layer = OpacityLayer(alpha: 50);
}
}