// Copyright 2015 The Chromium 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/rendering.dart'; import 'package:meta/meta.dart'; import 'package:test/test.dart'; import 'rendering_tester.dart'; class TestRenderSliverBoxChildManager extends RenderSliverBoxChildManager { TestRenderSliverBoxChildManager({ this.children, }); RenderSliverList _renderObject; List<RenderBox> children; RenderSliverList createRenderObject() { assert(_renderObject == null); _renderObject = new RenderSliverList(childManager: this); return _renderObject; } int _currentlyUpdatingChildIndex; @override void createChild(int index, { @required RenderBox after }) { if (index < 0 || index >= children.length) return null; 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 void didAdoptChild(RenderBox child) { assert(_currentlyUpdatingChildIndex != null); final SliverMultiBoxAdaptorParentData childParentData = child.parentData; childParentData.index = _currentlyUpdatingChildIndex; } @override void setDidUnderflow(bool value) { } } void main() { test('RenderSliverList basic test - down', () { RenderObject inner; RenderBox a, b, c, d, e; final TestRenderSliverBoxChildManager childManager = new TestRenderSliverBoxChildManager( children: <RenderBox>[ a = new RenderSizedBox(const Size(100.0, 400.0)), b = new RenderSizedBox(const Size(100.0, 400.0)), c = new RenderSizedBox(const Size(100.0, 400.0)), d = new RenderSizedBox(const Size(100.0, 400.0)), e = new RenderSizedBox(const Size(100.0, 400.0)), ], ); final RenderViewport root = new RenderViewport( axisDirection: AxisDirection.down, offset: new ViewportOffset.zero(), children: <RenderSliver>[ inner = childManager.createRenderObject(), ], ); layout(root); expect(root.size.width, equals(800.0)); expect(root.size.height, equals(600.0)); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 400.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); // make sure that layout is stable by laying out again inner.markNeedsLayout(); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 400.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); // now try various scroll offsets root.offset = new ViewportOffset.fixed(200.0); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -200.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 200.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); root.offset = new ViewportOffset.fixed(600.0); pumpFrame(); expect(a.attached, false); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -200.0)); expect(c.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 200.0)); expect(d.attached, false); expect(e.attached, false); root.offset = new ViewportOffset.fixed(900.0); pumpFrame(); expect(a.attached, false); expect(b.attached, false); expect(c.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -100.0)); expect(d.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 300.0)); expect(e.attached, false); // try going back up root.offset = new ViewportOffset.fixed(200.0); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -200.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 200.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); }); test('RenderSliverList basic test - up', () { RenderObject inner; RenderBox a, b, c, d, e; final TestRenderSliverBoxChildManager childManager = new TestRenderSliverBoxChildManager( children: <RenderBox>[ a = new RenderSizedBox(const Size(100.0, 400.0)), b = new RenderSizedBox(const Size(100.0, 400.0)), c = new RenderSizedBox(const Size(100.0, 400.0)), d = new RenderSizedBox(const Size(100.0, 400.0)), e = new RenderSizedBox(const Size(100.0, 400.0)), ], ); final RenderViewport root = new RenderViewport( axisDirection: AxisDirection.up, offset: new ViewportOffset.zero(), children: <RenderSliver>[ inner = childManager.createRenderObject(), ], ); layout(root); expect(root.size.width, equals(800.0)); expect(root.size.height, equals(600.0)); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 200.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -200.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); // make sure that layout is stable by laying out again inner.markNeedsLayout(); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 200.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -200.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); // now try various scroll offsets root.offset = new ViewportOffset.fixed(200.0); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 400.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); root.offset = new ViewportOffset.fixed(600.0); pumpFrame(); expect(a.attached, false); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 400.0)); expect(c.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0)); expect(d.attached, false); expect(e.attached, false); root.offset = new ViewportOffset.fixed(900.0); pumpFrame(); expect(a.attached, false); expect(b.attached, false); expect(c.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 300.0)); expect(d.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, -100.0)); expect(e.attached, false); // try going back up root.offset = new ViewportOffset.fixed(200.0); pumpFrame(); expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 400.0)); expect(b.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0)); expect(c.attached, false); expect(d.attached, false); expect(e.attached, false); }); test('SliverList - no zero scroll offset correction', () { RenderSliverList inner; RenderBox a; final TestRenderSliverBoxChildManager childManager = new TestRenderSliverBoxChildManager( children: <RenderBox>[ a = new RenderSizedBox(const Size(100.0, 400.0)), new RenderSizedBox(const Size(100.0, 400.0)), new RenderSizedBox(const Size(100.0, 400.0)), new RenderSizedBox(const Size(100.0, 400.0)), new RenderSizedBox(const Size(100.0, 400.0)), ], ); final RenderViewport root = new RenderViewport( axisDirection: AxisDirection.down, offset: new ViewportOffset.zero(), children: <RenderSliver>[ inner = childManager.createRenderObject(), ], ); layout(root); final SliverMultiBoxAdaptorParentData parentData = a.parentData; parentData.layoutOffset = 0.001; root.offset = new ViewportOffset.fixed(900.0); pumpFrame(); root.offset = new ViewportOffset.fixed(0.0); pumpFrame(); expect(inner.geometry.scrollOffsetCorrection, isNull); }); }