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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
114 lines
3.7 KiB
Dart
114 lines
3.7 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:math' as math;
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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/widgets.dart';
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void verifyPaintPosition(GlobalKey key, Offset ideal) {
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final RenderObject target = key.currentContext.findRenderObject();
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expect(target.parent, isInstanceOf<RenderViewport>());
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final SliverPhysicalParentData parentData = target.parentData;
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final Offset actual = parentData.paintOffset;
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expect(actual, ideal);
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}
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void main() {
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testWidgets('Sliver protocol', (WidgetTester tester) async {
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GlobalKey key1, key2, key3, key4, key5;
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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slivers: <Widget>[
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BigSliver(key: key1 = GlobalKey()),
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OverlappingSliver(key: key2 = GlobalKey()),
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OverlappingSliver(key: key3 = GlobalKey()),
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BigSliver(key: key4 = GlobalKey()),
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BigSliver(key: key5 = GlobalKey()),
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],
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),
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),
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);
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final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position;
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const double max = RenderBigSliver.height * 3.0 + (RenderOverlappingSliver.totalHeight) * 2.0 - 600.0; // 600 is the height of the test viewport
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assert(max < 10000.0);
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expect(max, 1450.0);
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expect(position.pixels, 0.0);
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expect(position.minScrollExtent, 0.0);
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expect(position.maxScrollExtent, max);
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position.animateTo(10000.0, curve: Curves.linear, duration: const Duration(minutes: 1));
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await tester.pumpAndSettle(const Duration(milliseconds: 10));
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expect(position.pixels, max);
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expect(position.minScrollExtent, 0.0);
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expect(position.maxScrollExtent, max);
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verifyPaintPosition(key1, const Offset(0.0, 0.0));
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verifyPaintPosition(key2, const Offset(0.0, 0.0));
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verifyPaintPosition(key3, const Offset(0.0, 0.0));
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verifyPaintPosition(key4, const Offset(0.0, 0.0));
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verifyPaintPosition(key5, const Offset(0.0, 50.0));
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});
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}
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class RenderBigSliver extends RenderSliver {
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static const double height = 550.0;
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double get paintExtent => (height - constraints.scrollOffset).clamp(0.0, constraints.remainingPaintExtent);
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@override
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void performLayout() {
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geometry = SliverGeometry(
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scrollExtent: height,
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paintExtent: paintExtent,
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maxPaintExtent: height,
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);
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}
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}
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class BigSliver extends LeafRenderObjectWidget {
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const BigSliver({ Key key }) : super(key: key);
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@override
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RenderBigSliver createRenderObject(BuildContext context) {
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return RenderBigSliver();
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}
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}
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class RenderOverlappingSliver extends RenderSliver {
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static const double totalHeight = 200.0;
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static const double fixedHeight = 100.0;
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double get paintExtent {
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return math.min(
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math.max(
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fixedHeight,
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totalHeight - constraints.scrollOffset,
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),
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constraints.remainingPaintExtent,
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);
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}
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double get layoutExtent {
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return (totalHeight - constraints.scrollOffset).clamp(0.0, constraints.remainingPaintExtent);
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}
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@override
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void performLayout() {
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geometry = SliverGeometry(
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scrollExtent: totalHeight,
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paintExtent: paintExtent,
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layoutExtent: layoutExtent,
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maxPaintExtent: totalHeight,
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);
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}
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}
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class OverlappingSliver extends LeafRenderObjectWidget {
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const OverlappingSliver({ Key key }) : super(key: key);
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@override
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RenderOverlappingSliver createRenderObject(BuildContext context) {
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return RenderOverlappingSliver();
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}
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}
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