e71eb183d8
* Use `curly_braces_in_flow_control_structures` for `rendering` * fix comments * fix dangling
358 lines
11 KiB
Dart
358 lines
11 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 'package:flutter/animation.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'rendering_tester.dart';
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class TestRenderSliverBoxChildManager extends RenderSliverBoxChildManager {
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TestRenderSliverBoxChildManager({
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required this.children,
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});
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late RenderSliverList _renderObject;
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List<RenderBox> children;
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RenderSliverList createRenderObject() {
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_renderObject = RenderSliverList(childManager: this);
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return _renderObject;
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}
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int? _currentlyUpdatingChildIndex;
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@override
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void createChild(int index, { required RenderBox? after }) {
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if (index < 0 || index >= children.length) {
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return;
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}
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try {
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_currentlyUpdatingChildIndex = index;
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_renderObject.insert(children[index], after: after);
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} finally {
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_currentlyUpdatingChildIndex = null;
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}
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}
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@override
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void removeChild(RenderBox child) {
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_renderObject.remove(child);
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}
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@override
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double estimateMaxScrollOffset(
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SliverConstraints constraints, {
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int? firstIndex,
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int? lastIndex,
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double? leadingScrollOffset,
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double? trailingScrollOffset,
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}) {
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assert(lastIndex! >= firstIndex!);
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return children.length * (trailingScrollOffset! - leadingScrollOffset!) / (lastIndex! - firstIndex! + 1);
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}
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@override
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int get childCount => children.length;
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@override
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void didAdoptChild(RenderBox child) {
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assert(_currentlyUpdatingChildIndex != null);
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final SliverMultiBoxAdaptorParentData childParentData = child.parentData! as SliverMultiBoxAdaptorParentData;
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childParentData.index = _currentlyUpdatingChildIndex;
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}
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@override
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void setDidUnderflow(bool value) { }
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}
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class ViewportOffsetSpy extends ViewportOffset {
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ViewportOffsetSpy(this._pixels);
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double _pixels;
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@override
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double get pixels => _pixels;
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@override
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bool get hasPixels => true;
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bool corrected = false;
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@override
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bool applyViewportDimension(double viewportDimension) => true;
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@override
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bool applyContentDimensions(double minScrollExtent, double maxScrollExtent) => true;
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@override
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void correctBy(double correction) {
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_pixels += correction;
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corrected = true;
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}
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@override
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void jumpTo(double pixels) {
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// Do nothing, not required in test.
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}
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@override
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Future<void> animateTo(
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double to, {
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required Duration duration,
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required Curve curve,
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}) async {
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// Do nothing, not required in test.
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}
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@override
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ScrollDirection get userScrollDirection => ScrollDirection.idle;
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@override
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bool get allowImplicitScrolling => false;
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}
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void main() {
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TestRenderingFlutterBinding.ensureInitialized();
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test('RenderSliverList basic test - down', () {
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RenderObject inner;
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RenderBox a, b, c, d, e;
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: <RenderBox>[
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a = RenderSizedBox(const Size(100.0, 400.0)),
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b = RenderSizedBox(const Size(100.0, 400.0)),
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c = RenderSizedBox(const Size(100.0, 400.0)),
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d = RenderSizedBox(const Size(100.0, 400.0)),
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e = RenderSizedBox(const Size(100.0, 400.0)),
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],
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);
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final RenderViewport root = RenderViewport(
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 0.0,
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children: <RenderSliver>[
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inner = childManager.createRenderObject(),
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],
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);
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layout(root);
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expect(root.size.width, equals(800.0));
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expect(root.size.height, equals(600.0));
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expect(a.localToGlobal(Offset.zero), Offset.zero);
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, 400.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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// make sure that layout is stable by laying out again
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inner.markNeedsLayout();
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), Offset.zero);
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, 400.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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// now try various scroll offsets
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root.offset = ViewportOffset.fixed(200.0);
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, -200.0));
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, 200.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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root.offset = ViewportOffset.fixed(600.0);
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pumpFrame();
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expect(a.attached, false);
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, -200.0));
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expect(c.localToGlobal(Offset.zero), const Offset(0.0, 200.0));
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expect(d.attached, false);
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expect(e.attached, false);
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root.offset = ViewportOffset.fixed(900.0);
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pumpFrame();
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expect(a.attached, false);
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expect(b.attached, false);
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expect(c.localToGlobal(Offset.zero), const Offset(0.0, -100.0));
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expect(d.localToGlobal(Offset.zero), const Offset(0.0, 300.0));
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expect(e.attached, false);
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// try going back up
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root.offset = ViewportOffset.fixed(200.0);
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, -200.0));
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, 200.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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});
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test('RenderSliverList basic test - up', () {
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RenderObject inner;
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RenderBox a, b, c, d, e;
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: <RenderBox>[
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a = RenderSizedBox(const Size(100.0, 400.0)),
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b = RenderSizedBox(const Size(100.0, 400.0)),
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c = RenderSizedBox(const Size(100.0, 400.0)),
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d = RenderSizedBox(const Size(100.0, 400.0)),
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e = RenderSizedBox(const Size(100.0, 400.0)),
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],
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);
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.up,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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children: <RenderSliver>[
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inner = childManager.createRenderObject(),
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],
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cacheExtent: 0.0,
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);
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layout(root);
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expect(root.size.width, equals(800.0));
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expect(root.size.height, equals(600.0));
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, 200.0));
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, -200.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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// make sure that layout is stable by laying out again
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inner.markNeedsLayout();
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, 200.0));
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, -200.0));
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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// now try various scroll offsets
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root.offset = ViewportOffset.fixed(200.0);
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, 400.0));
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expect(b.localToGlobal(Offset.zero), Offset.zero);
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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root.offset = ViewportOffset.fixed(600.0);
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pumpFrame();
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expect(a.attached, false);
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expect(b.localToGlobal(Offset.zero), const Offset(0.0, 400.0));
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expect(c.localToGlobal(Offset.zero), Offset.zero);
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expect(d.attached, false);
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expect(e.attached, false);
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root.offset = ViewportOffset.fixed(900.0);
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pumpFrame();
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expect(a.attached, false);
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expect(b.attached, false);
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expect(c.localToGlobal(Offset.zero), const Offset(0.0, 300.0));
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expect(d.localToGlobal(Offset.zero), const Offset(0.0, -100.0));
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expect(e.attached, false);
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// try going back up
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root.offset = ViewportOffset.fixed(200.0);
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pumpFrame();
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expect(a.localToGlobal(Offset.zero), const Offset(0.0, 400.0));
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expect(b.localToGlobal(Offset.zero), Offset.zero);
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expect(c.attached, false);
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expect(d.attached, false);
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expect(e.attached, false);
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});
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test('SliverList - no zero scroll offset correction', () {
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RenderSliverList inner;
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RenderBox a;
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: <RenderBox>[
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a = RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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],
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);
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final RenderViewport root = RenderViewport(
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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children: <RenderSliver>[
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inner = childManager.createRenderObject(),
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],
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);
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layout(root);
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final SliverMultiBoxAdaptorParentData parentData = a.parentData! as SliverMultiBoxAdaptorParentData;
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parentData.layoutOffset = 0.001;
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root.offset = ViewportOffset.fixed(900.0);
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pumpFrame();
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root.offset = ViewportOffset.fixed(0.0);
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pumpFrame();
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expect(inner.geometry?.scrollOffsetCorrection, isNull);
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});
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test('SliverList - no correction when tiny double precision error', () {
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RenderSliverList inner;
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RenderBox a;
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: <RenderBox>[
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a = RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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RenderSizedBox(const Size(100.0, 400.0)),
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],
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);
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inner = childManager.createRenderObject();
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final RenderViewport root = RenderViewport(
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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children: <RenderSliver>[
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inner,
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],
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);
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layout(root);
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final SliverMultiBoxAdaptorParentData parentData = a.parentData! as SliverMultiBoxAdaptorParentData;
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// Simulate double precision error.
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parentData.layoutOffset = -0.0000000000001;
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root.offset = ViewportOffset.fixed(900.0);
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pumpFrame();
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final ViewportOffsetSpy spy = ViewportOffsetSpy(0.0);
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root.offset = spy;
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pumpFrame();
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expect(spy.corrected, false);
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});
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test('SliverMultiBoxAdaptorParentData.toString', () {
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final SliverMultiBoxAdaptorParentData candidate = SliverMultiBoxAdaptorParentData();
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expect(candidate.keepAlive, isFalse);
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expect(candidate.index, isNull);
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expect(candidate.toString(), 'index=null; layoutOffset=None');
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candidate.keepAlive = true;
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expect(candidate.toString(), 'index=null; keepAlive; layoutOffset=None');
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candidate.keepAlive = false;
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expect(candidate.toString(), 'index=null; layoutOffset=None');
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candidate.index = 0;
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expect(candidate.toString(), 'index=0; layoutOffset=None');
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candidate.index = 1;
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expect(candidate.toString(), 'index=1; layoutOffset=None');
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candidate.index = -1;
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expect(candidate.toString(), 'index=-1; layoutOffset=None');
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candidate.layoutOffset = 100.0;
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expect(candidate.toString(), 'index=-1; layoutOffset=100.0');
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});
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}
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