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449f4a6673
* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
973 lines
27 KiB
Dart
973 lines
27 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/foundation.dart';
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import 'package:flutter/rendering.dart';
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import '../flutter_test_alternative.dart';
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import 'rendering_tester.dart';
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void main() {
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test('RenderViewport calculates correct constraints, RenderSliverToBoxAdapter calculates correct geometry', () {
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final List<RenderSliver> children = List<RenderSliver>.generate(30, (int index) {
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return RenderSliverToBoxAdapter(
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child: RenderSizedBox(const Size(400.0, 100.0)),
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);
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});
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// Viewport is 800x600, can show 6 children at a time.
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.down,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 250.0,
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children: children,
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);
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layout(root);
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RenderSliver firstVisible = children[0];
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expectSliverConstraints(
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sliver: firstVisible,
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cacheOrigin: 0.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 600.0 + 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: firstVisible,
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paintExtent: 100.0,
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cacheExtent: 100.0,
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visible: true,
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);
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RenderSliver lastVisible = children[5];
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expectSliverConstraints(
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sliver: lastVisible,
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cacheOrigin: 0.0,
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remainingPaintExtent: 100.0,
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remainingCacheExtent: 350.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: lastVisible,
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paintExtent: 100.0,
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cacheExtent: 100.0,
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visible: true,
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);
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RenderSliver firstInCache = children[6];
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expectSliverConstraints(
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sliver: firstInCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: firstInCache,
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paintExtent: 0.0,
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cacheExtent: 100.0,
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visible: false,
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);
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RenderSliver lastInCache = children[8];
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expectSliverConstraints(
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sliver: lastInCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 50.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: lastInCache,
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paintExtent: 0.0,
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cacheExtent: 50.0,
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visible: false,
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);
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RenderSliver outsideCache = children[9];
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expectSliverConstraints(
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sliver: outsideCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 0.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: outsideCache,
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paintExtent: 0.0,
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cacheExtent: 0.0,
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visible: false,
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);
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// scroll down half a sliver
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root.offset = ViewportOffset.fixed(50.0);
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pumpFrame();
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firstVisible = children[0];
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expectSliverConstraints(
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sliver: firstVisible,
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cacheOrigin: -50.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 50.0 + 600.0 + 250.0,
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scrollOffset: 50.0,
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);
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expectSliverGeometry(
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sliver: firstVisible,
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paintExtent: 50.0,
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cacheExtent: 100.0,
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visible: true,
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);
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lastVisible = children[6];
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expectSliverConstraints(
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sliver: lastVisible,
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cacheOrigin: 0.0,
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remainingPaintExtent: 50.0,
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remainingCacheExtent: 300.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: lastVisible,
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paintExtent: 50.0,
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cacheExtent: 100.0,
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visible: true,
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);
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firstInCache = children[7];
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expectSliverConstraints(
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sliver: firstInCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 200.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: firstInCache,
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paintExtent: 0.0,
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cacheExtent: 100.0,
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visible: false,
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);
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lastInCache = children[8];
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expectSliverConstraints(
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sliver: lastInCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 100.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: lastInCache,
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paintExtent: 0.0,
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cacheExtent: 100.0,
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visible: false,
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);
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outsideCache = children[9];
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expectSliverConstraints(
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sliver: outsideCache,
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cacheOrigin: 0.0,
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remainingPaintExtent: 0.0,
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remainingCacheExtent: 0.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: outsideCache,
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paintExtent: 0.0,
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cacheExtent: 0.0,
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visible: false,
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);
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// scroll down 1.5 slivers
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root.offset = ViewportOffset.fixed(150.0);
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pumpFrame();
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RenderSliver firstInPreCache = children[0];
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expectSliverConstraints(
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sliver: firstInPreCache,
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cacheOrigin: -150.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 150.0 + 600.0 + 250.0,
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scrollOffset: 150.0,
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);
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expectSliverGeometry(
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sliver: firstInPreCache,
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paintExtent: 0.0,
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cacheExtent: 100.0,
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visible: false,
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);
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firstVisible = children[1];
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expectSliverConstraints(
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sliver: firstVisible,
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cacheOrigin: -50.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 50.0 + 600.0 + 250.0,
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scrollOffset: 50.0,
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);
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expectSliverGeometry(
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sliver: firstVisible,
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paintExtent: 50.0,
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cacheExtent: 100.0,
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visible: true,
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);
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// scroll down 10 slivers
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root.offset = ViewportOffset.fixed(1000.0);
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pumpFrame();
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final RenderSliver first = children[0];
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expectSliverConstraints(
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sliver: first,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 1000.0,
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);
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expectSliverGeometry(
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sliver: first,
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paintExtent: 0.0,
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cacheExtent: 0.0,
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visible: false,
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);
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firstInPreCache = children[7];
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expectSliverConstraints(
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sliver: firstInPreCache,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 300.0,
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);
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expectSliverGeometry(
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sliver: firstInPreCache,
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paintExtent: 0.0,
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cacheExtent: 50.0,
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visible: false,
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);
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final RenderSliver lastInPreCache = children[9];
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expectSliverConstraints(
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sliver: lastInPreCache,
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cacheOrigin: -100.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 100.0 + 600.0 + 250.0,
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scrollOffset: 100.0,
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);
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expectSliverGeometry(
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sliver: lastInPreCache,
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paintExtent: 0.0,
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cacheExtent: 100.0,
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visible: false,
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);
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firstVisible = children[10];
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expectSliverConstraints(
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sliver: firstVisible,
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cacheOrigin: 0.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 600.0 + 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: firstVisible,
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paintExtent: 100.0,
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cacheExtent: 100.0,
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visible: true,
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);
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});
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test('RenderSliverFixedExtentList calculates correct geometry', () {
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// Viewport is 800x600, can show 6 full children at a time
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final List<RenderBox> children = List<RenderBox>.generate(30, (int index) {
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return RenderSizedBox(const Size(400.0, 100.0));
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});
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: children,
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);
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RenderSliverFixedExtentList inner;
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.down,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 250.0,
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children: <RenderSliver>[
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inner = childManager.createRenderSliverFixedExtentList(),
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],
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);
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layout(root);
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: 0.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 600.0 + 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 850.0,
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visible: true,
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);
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expect(children.sublist(0, 9).every((RenderBox r) => r.attached), true);
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expect(children.sublist(9, 30).any((RenderBox r) => r.attached), false);
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// scroll half an item down
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root.offset = ViewportOffset.fixed(50.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -50.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 50.0 + 600.0 + 250.0,
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scrollOffset: 50.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 900.0,
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visible: true,
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);
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expect(children.sublist(0, 9).every((RenderBox r) => r.attached), true);
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expect(children.sublist(9, 30).any((RenderBox r) => r.attached), false);
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// scroll to the middle
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root.offset = ViewportOffset.fixed(1500.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 1500.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 1100.0,
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visible: true,
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);
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expect(children.sublist(0, 12).any((RenderBox r) => r.attached), false);
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expect(children.sublist(12, 24).every((RenderBox r) => r.attached), true);
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expect(children.sublist(24, 30).any((RenderBox r) => r.attached), false);
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// scroll to the end
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root.offset = ViewportOffset.fixed(2400.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 2400.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 850.0,
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visible: true,
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);
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expect(children.sublist(0, 21).any((RenderBox r) => r.attached), false);
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expect(children.sublist(21, 30).every((RenderBox r) => r.attached), true);
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});
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test('RenderSliverList calculates correct geometry', () {
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// Viewport is 800x600, can show 6 full children at a time
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final List<RenderBox> children = List<RenderBox>.generate(30, (int index) {
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return RenderSizedBox(const Size(400.0, 100.0));
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});
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: children,
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);
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RenderSliverList inner;
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.down,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 250.0,
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children: <RenderSliver>[
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inner = childManager.createRenderSliverList(),
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],
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);
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layout(root);
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: 0.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 600.0 + 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 850.0,
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visible: true,
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);
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expect(children.sublist(0, 9).every((RenderBox r) => r.attached), true);
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expect(children.sublist(9, 30).any((RenderBox r) => r.attached), false);
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// scroll half an item down
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root.offset = ViewportOffset.fixed(50.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -50.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 50.0 + 600.0 + 250.0,
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scrollOffset: 50.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 900.0,
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visible: true,
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);
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expect(children.sublist(0, 9).every((RenderBox r) => r.attached), true);
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expect(children.sublist(9, 30).any((RenderBox r) => r.attached), false);
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// scroll to the middle
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root.offset = ViewportOffset.fixed(1500.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 1500.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 1100.0,
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visible: true,
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);
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expect(children.sublist(0, 12).any((RenderBox r) => r.attached), false);
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expect(children.sublist(12, 24).every((RenderBox r) => r.attached), true);
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expect(children.sublist(24, 30).any((RenderBox r) => r.attached), false);
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// scroll to the end
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root.offset = ViewportOffset.fixed(2400.0);
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pumpFrame();
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: -250.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 250.0 + 600.0 + 250.0,
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scrollOffset: 2400.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 850.0,
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visible: true,
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);
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expect(children.sublist(0, 21).any((RenderBox r) => r.attached), false);
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expect(children.sublist(21, 30).every((RenderBox r) => r.attached), true);
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}, skip: isBrowser);
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test('RenderSliverGrid calculates correct geometry', () {
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// Viewport is 800x600, each grid element is 400x100, giving us space for 12 visible children
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final List<RenderBox> children = List<RenderBox>.generate(60, (int index) {
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return RenderSizedBox(const Size(400.0, 100.0));
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});
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final TestRenderSliverBoxChildManager childManager = TestRenderSliverBoxChildManager(
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children: children,
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);
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RenderSliverGrid inner;
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.down,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 250.0,
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children: <RenderSliver>[
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inner = childManager.createRenderSliverGrid(),
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],
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);
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layout(root);
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expectSliverConstraints(
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sliver: inner,
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cacheOrigin: 0.0,
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remainingPaintExtent: 600.0,
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remainingCacheExtent: 600.0 + 250.0,
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scrollOffset: 0.0,
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);
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expectSliverGeometry(
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sliver: inner,
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paintExtent: 600.0,
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cacheExtent: 850.0,
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visible: true,
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);
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expect(children.sublist(0, 18).every((RenderBox r) => r.attached), true);
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expect(children.sublist(18, 60).any((RenderBox r) => r.attached), false);
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// scroll half an item down
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root.offset = ViewportOffset.fixed(50.0);
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pumpFrame();
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|
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expectSliverConstraints(
|
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sliver: inner,
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cacheOrigin: -50.0,
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remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 50.0 + 600.0 + 250.0,
|
|
scrollOffset: 50.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: inner,
|
|
paintExtent: 600.0,
|
|
cacheExtent: 900.0,
|
|
visible: true,
|
|
);
|
|
expect(children.sublist(0, 18).every((RenderBox r) => r.attached), true);
|
|
expect(children.sublist(18, 60).any((RenderBox r) => r.attached), false);
|
|
|
|
|
|
// scroll to the middle
|
|
root.offset = ViewportOffset.fixed(1500.0);
|
|
pumpFrame();
|
|
|
|
expectSliverConstraints(
|
|
sliver: inner,
|
|
cacheOrigin: -250.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 1500.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: inner,
|
|
paintExtent: 600.0,
|
|
cacheExtent: 1100.0,
|
|
visible: true,
|
|
);
|
|
|
|
expect(children.sublist(0, 24).any((RenderBox r) => r.attached), false);
|
|
expect(children.sublist(24, 48).every((RenderBox r) => r.attached), true);
|
|
expect(children.sublist(48, 60).any((RenderBox r) => r.attached), false);
|
|
|
|
// scroll to the end
|
|
root.offset = ViewportOffset.fixed(2400.0);
|
|
pumpFrame();
|
|
|
|
expectSliverConstraints(
|
|
sliver: inner,
|
|
cacheOrigin: -250.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 2400.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: inner,
|
|
paintExtent: 600.0,
|
|
cacheExtent: 850.0,
|
|
visible: true,
|
|
);
|
|
expect(children.sublist(0, 42).any((RenderBox r) => r.attached), false);
|
|
expect(children.sublist(42, 60).every((RenderBox r) => r.attached), true);
|
|
});
|
|
|
|
test('RenderSliverPadding calculates correct geometry', () {
|
|
// Viewport is 800x600, each item is 100px high with 50px before and after = 200px
|
|
|
|
final List<RenderSliverToBoxAdapter> adapters = <RenderSliverToBoxAdapter>[];
|
|
final List<RenderSliverPadding> paddings = List<RenderSliverPadding>.generate(30, (int index) {
|
|
RenderSliverToBoxAdapter adapter;
|
|
final RenderSliverPadding padding = RenderSliverPadding(
|
|
padding: const EdgeInsets.symmetric(vertical: 50.0),
|
|
child: adapter = RenderSliverToBoxAdapter(
|
|
child: RenderSizedBox(const Size(400.0, 100.0)),
|
|
),
|
|
);
|
|
adapters.add(adapter);
|
|
return padding;
|
|
});
|
|
|
|
|
|
final RenderViewport root = RenderViewport(
|
|
axisDirection: AxisDirection.down,
|
|
crossAxisDirection: AxisDirection.right,
|
|
offset: ViewportOffset.zero(),
|
|
cacheExtent: 250.0,
|
|
children: paddings,
|
|
);
|
|
layout(root);
|
|
|
|
RenderSliverPadding firstVisiblePadding = paddings[0];
|
|
expectSliverConstraints(
|
|
sliver: firstVisiblePadding,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 600.0 + 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstVisiblePadding,
|
|
paintExtent: 200.0,
|
|
cacheExtent: 200.0,
|
|
visible: true,
|
|
);
|
|
RenderSliverToBoxAdapter firstVisiblePadded = adapters[0];
|
|
expectSliverConstraints(
|
|
sliver: firstVisiblePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 550.0,
|
|
remainingCacheExtent: 600.0 + 250.0 - 50.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstVisiblePadded,
|
|
paintExtent: 100.0,
|
|
cacheExtent: 100.0,
|
|
visible: true,
|
|
);
|
|
|
|
RenderSliverPadding lastVisiblePadding = paddings[2];
|
|
expectSliverConstraints(
|
|
sliver: lastVisiblePadding,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 200.0,
|
|
remainingCacheExtent: 200.0 + 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastVisiblePadding,
|
|
paintExtent: 200.0,
|
|
cacheExtent: 200.0,
|
|
visible: true,
|
|
);
|
|
RenderSliverToBoxAdapter lastVisiblePadded = adapters[2];
|
|
expectSliverConstraints(
|
|
sliver: lastVisiblePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 150.0,
|
|
remainingCacheExtent: 200.0 + 250.0 - 50.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastVisiblePadded,
|
|
paintExtent: 100.0,
|
|
cacheExtent: 100.0,
|
|
visible: true,
|
|
);
|
|
|
|
final RenderSliverPadding firstCachePadding = paddings[3];
|
|
expectSliverConstraints(
|
|
sliver: firstCachePadding,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 0.0,
|
|
remainingCacheExtent: 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstCachePadding,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 200.0,
|
|
visible: false,
|
|
);
|
|
final RenderSliverToBoxAdapter firstCachePadded = adapters[3];
|
|
expectSliverConstraints(
|
|
sliver: firstCachePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 0.0,
|
|
remainingCacheExtent: 250.0 - 50.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstCachePadded,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 100.0,
|
|
visible: false,
|
|
);
|
|
|
|
final RenderSliverPadding lastCachePadding = paddings[4];
|
|
expectSliverConstraints(
|
|
sliver: lastCachePadding,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 0.0,
|
|
remainingCacheExtent: 50.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastCachePadding,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 50.0,
|
|
visible: false,
|
|
);
|
|
final RenderSliverToBoxAdapter lastCachePadded = adapters[4];
|
|
expectSliverConstraints(
|
|
sliver: lastCachePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 0.0,
|
|
remainingCacheExtent: 0.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastCachePadded,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 0.0,
|
|
visible: false,
|
|
);
|
|
|
|
// scroll first padding off screen
|
|
root.offset = ViewportOffset.fixed(50.0);
|
|
pumpFrame();
|
|
|
|
firstVisiblePadding = paddings[0];
|
|
expectSliverConstraints(
|
|
sliver: firstVisiblePadding,
|
|
cacheOrigin: -50.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 50.0 + 600.0 + 250.0,
|
|
scrollOffset: 50.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstVisiblePadding,
|
|
paintExtent: 150.0,
|
|
cacheExtent: 200.0,
|
|
visible: true,
|
|
);
|
|
firstVisiblePadded = adapters[0];
|
|
expectSliverConstraints(
|
|
sliver: firstVisiblePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 600.0 + 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstVisiblePadded,
|
|
paintExtent: 100.0,
|
|
cacheExtent: 100.0,
|
|
visible: true,
|
|
);
|
|
|
|
// scroll to the end
|
|
root.offset = ViewportOffset.fixed(5400.0);
|
|
pumpFrame();
|
|
|
|
|
|
final RenderSliverPadding firstPadding = paddings[0];
|
|
expectSliverConstraints(
|
|
sliver: firstPadding,
|
|
cacheOrigin: -250.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 5400.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstPadding,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 0.0,
|
|
visible: false,
|
|
);
|
|
final RenderSliverToBoxAdapter firstPadded = adapters[0];
|
|
expectSliverConstraints(
|
|
sliver: firstPadded,
|
|
cacheOrigin: -200.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 5350.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstPadded,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 0.0,
|
|
visible: false,
|
|
);
|
|
|
|
final RenderSliverPadding firstPreCachePadding = paddings[25];
|
|
expectSliverConstraints(
|
|
sliver: firstPreCachePadding,
|
|
cacheOrigin: -250.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 400.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstPreCachePadding,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 50.0,
|
|
visible: false,
|
|
);
|
|
final RenderSliverToBoxAdapter firstPreCachePadded = adapters[25];
|
|
expectSliverConstraints(
|
|
sliver: firstPreCachePadded,
|
|
cacheOrigin: -200.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 250.0 + 600.0 + 250.0,
|
|
scrollOffset: 350.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: firstPreCachePadded,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 0.0,
|
|
visible: false,
|
|
);
|
|
|
|
final RenderSliverPadding lastPreCachePadding = paddings[26];
|
|
expectSliverConstraints(
|
|
sliver: lastPreCachePadding,
|
|
cacheOrigin: -200.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 200.0 + 600.0 + 250.0,
|
|
scrollOffset: 200.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastPreCachePadding,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 200.0,
|
|
visible: false,
|
|
);
|
|
final RenderSliverToBoxAdapter lastPreCachePadded = adapters[26];
|
|
expectSliverConstraints(
|
|
sliver: lastPreCachePadded,
|
|
cacheOrigin: -150.0,
|
|
remainingPaintExtent: 600.0,
|
|
remainingCacheExtent: 150.0 + 600.0 + 250.0,
|
|
scrollOffset: 150.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastPreCachePadded,
|
|
paintExtent: 0.0,
|
|
cacheExtent: 100.0,
|
|
visible: false,
|
|
);
|
|
|
|
lastVisiblePadding = paddings[29];
|
|
expectSliverConstraints(
|
|
sliver: lastVisiblePadding,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 200.0,
|
|
remainingCacheExtent: 200.0 + 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastVisiblePadding,
|
|
paintExtent: 200.0,
|
|
cacheExtent: 200.0,
|
|
visible: true,
|
|
);
|
|
lastVisiblePadded = adapters[29];
|
|
expectSliverConstraints(
|
|
sliver: lastVisiblePadded,
|
|
cacheOrigin: 0.0,
|
|
remainingPaintExtent: 150.0,
|
|
remainingCacheExtent: 150.0 + 250.0,
|
|
scrollOffset: 0.0,
|
|
);
|
|
expectSliverGeometry(
|
|
sliver: lastVisiblePadded,
|
|
paintExtent: 100.0,
|
|
cacheExtent: 100.0,
|
|
visible: true,
|
|
);
|
|
});
|
|
}
|
|
|
|
void expectSliverConstraints({ RenderSliver sliver, double cacheOrigin, double remainingPaintExtent, double remainingCacheExtent, double scrollOffset }) {
|
|
expect(sliver.constraints.cacheOrigin, cacheOrigin, reason: 'cacheOrigin');
|
|
expect(sliver.constraints.remainingPaintExtent, remainingPaintExtent, reason: 'remainingPaintExtent');
|
|
expect(sliver.constraints.remainingCacheExtent, remainingCacheExtent, reason: 'remainingCacheExtent');
|
|
expect(sliver.constraints.scrollOffset, scrollOffset, reason: 'scrollOffset');
|
|
}
|
|
|
|
void expectSliverGeometry({ RenderSliver sliver, double paintExtent, double cacheExtent, bool visible }) {
|
|
expect(sliver.geometry.paintExtent, paintExtent, reason: 'paintExtent');
|
|
expect(sliver.geometry.cacheExtent, cacheExtent, reason: 'cacheExtent');
|
|
expect(sliver.geometry.visible, visible, reason: 'visible');
|
|
}
|
|
|
|
class TestRenderSliverBoxChildManager extends RenderSliverBoxChildManager {
|
|
TestRenderSliverBoxChildManager({
|
|
this.children,
|
|
});
|
|
|
|
RenderSliverMultiBoxAdaptor _renderObject;
|
|
List<RenderBox> children;
|
|
|
|
RenderSliverList createRenderSliverList() {
|
|
assert(_renderObject == null);
|
|
_renderObject = RenderSliverList(childManager: this);
|
|
return _renderObject;
|
|
}
|
|
|
|
RenderSliverFixedExtentList createRenderSliverFixedExtentList() {
|
|
assert(_renderObject == null);
|
|
_renderObject = RenderSliverFixedExtentList(
|
|
childManager: this,
|
|
itemExtent: 100.0,
|
|
);
|
|
return _renderObject;
|
|
}
|
|
|
|
RenderSliverGrid createRenderSliverGrid() {
|
|
assert(_renderObject == null);
|
|
_renderObject = RenderSliverGrid(
|
|
childManager: this,
|
|
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
|
|
crossAxisCount: 2,
|
|
childAspectRatio: 4.0,
|
|
),
|
|
);
|
|
return _renderObject;
|
|
}
|
|
|
|
int _currentlyUpdatingChildIndex;
|
|
|
|
@override
|
|
void createChild(int index, { @required RenderBox after }) {
|
|
if (index < 0 || index >= children.length)
|
|
return;
|
|
try {
|
|
_currentlyUpdatingChildIndex = index;
|
|
_renderObject.insert(children[index], after: after);
|
|
} finally {
|
|
_currentlyUpdatingChildIndex = null;
|
|
}
|
|
}
|
|
|
|
@override
|
|
void removeChild(RenderBox child) {
|
|
_renderObject.remove(child);
|
|
}
|
|
|
|
@override
|
|
double estimateMaxScrollOffset(
|
|
SliverConstraints constraints, {
|
|
int firstIndex,
|
|
int lastIndex,
|
|
double leadingScrollOffset,
|
|
double trailingScrollOffset,
|
|
}) {
|
|
assert(lastIndex >= firstIndex);
|
|
return children.length * (trailingScrollOffset - leadingScrollOffset) / (lastIndex - firstIndex + 1);
|
|
}
|
|
|
|
@override
|
|
int get childCount => children.length;
|
|
|
|
@override
|
|
void didAdoptChild(RenderBox child) {
|
|
assert(_currentlyUpdatingChildIndex != null);
|
|
final SliverMultiBoxAdaptorParentData childParentData = child.parentData;
|
|
childParentData.index = _currentlyUpdatingChildIndex;
|
|
}
|
|
|
|
@override
|
|
void setDidUnderflow(bool value) { }
|
|
}
|