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fb4dbf4584
Now we just have one TextSpan class that handles both simple strings, trees of children, and styling both. This approach simplifies the interface for most clients. This patch also removes StyledText, which was weakly typed and tricky to use correctly. The replacement is RichText, which is strongly typed and uses TextSpan.
87 lines
3.4 KiB
Dart
87 lines
3.4 KiB
Dart
// Copyright 2015 The Chromium 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/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:test/test.dart';
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import 'rendering_tester.dart';
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class TestBlockPainter extends Painter {
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void paint(PaintingContext context, Offset offset) { }
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}
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void main() {
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test('block intrinsics', () {
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RenderParagraph paragraph = new RenderParagraph(
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new TextSpan(
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style: new TextStyle(height: 1.0),
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text: 'Hello World'
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)
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);
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const BoxConstraints unconstrained = const BoxConstraints();
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double textWidth = paragraph.getMaxIntrinsicWidth(unconstrained);
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double oneLineTextHeight = paragraph.getMinIntrinsicHeight(unconstrained);
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final BoxConstraints constrained = new BoxConstraints(maxWidth: textWidth * 0.9);
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double wrappedTextWidth = paragraph.getMinIntrinsicWidth(unconstrained);
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double twoLinesTextHeight = paragraph.getMinIntrinsicHeight(constrained);
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// controls
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expect(wrappedTextWidth, lessThan(textWidth));
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expect(paragraph.getMinIntrinsicWidth(unconstrained), equals(wrappedTextWidth));
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expect(paragraph.getMaxIntrinsicWidth(constrained), equals(constrained.maxWidth));
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expect(oneLineTextHeight, lessThan(twoLinesTextHeight));
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expect(twoLinesTextHeight, lessThan(oneLineTextHeight * 3.0));
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expect(paragraph.getMaxIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(paragraph.getMaxIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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RenderBox testBlock = new RenderBlock(
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children: <RenderBox>[
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paragraph,
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]
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);
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expect(testBlock.getMinIntrinsicWidth(unconstrained), equals(wrappedTextWidth));
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expect(testBlock.getMinIntrinsicWidth(constrained), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(unconstrained), equals(textWidth));
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expect(testBlock.getMaxIntrinsicWidth(constrained), equals(constrained.maxWidth));
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expect(testBlock.getMinIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(testBlock.getMinIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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final BoxConstraints empty = new BoxConstraints.tight(Size.zero);
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expect(testBlock.getMinIntrinsicWidth(empty), equals(0.0));
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expect(testBlock.getMaxIntrinsicWidth(empty), equals(0.0));
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expect(testBlock.getMinIntrinsicHeight(empty), equals(0.0));
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expect(testBlock.getMaxIntrinsicHeight(empty), equals(0.0));
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});
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test('overlay painters can attach and detach', () {
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TestBlockPainter first = new TestBlockPainter();
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TestBlockPainter second = new TestBlockPainter();
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RenderBlockViewport block = new RenderBlockViewport(overlayPainter: first);
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// The first painter isn't attached because we haven't attached block.
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expect(first.renderObject, isNull);
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expect(second.renderObject, isNull);
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block.overlayPainter = second;
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expect(first.renderObject, isNull);
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expect(second.renderObject, isNull);
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layout(block);
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expect(first.renderObject, isNull);
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expect(second.renderObject, equals(block));
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block.overlayPainter = first;
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expect(first.renderObject, equals(block));
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expect(second.renderObject, isNull);
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});
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}
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