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f5bd8976de
The underlying TextPainter is not exposed, so this patch exposes some useful metrics that clients might want to read.
76 lines
2.6 KiB
Dart
76 lines
2.6 KiB
Dart
// Copyright 2016 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 'dart:ui' as ui show TextBox;
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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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const String _kText = 'I polished up that handle so carefullee\nThat now I am the Ruler of the Queen\'s Navee!';
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void main() {
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test('getOffsetForCaret control test', () {
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RenderParagraph paragraph = new RenderParagraph(new TextSpan(text: _kText));
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layout(paragraph);
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Rect caret = new Rect.fromLTWH(0.0, 0.0, 2.0, 20.0);
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Offset offset5 = paragraph.getOffsetForCaret(new TextPosition(offset: 5), caret);
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expect(offset5.dx, greaterThan(0.0));
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Offset offset25 = paragraph.getOffsetForCaret(new TextPosition(offset: 25), caret);
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expect(offset25.dx, greaterThan(offset5.dx));
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Offset offset50 = paragraph.getOffsetForCaret(new TextPosition(offset: 50), caret);
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expect(offset50.dy, greaterThan(offset5.dy));
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});
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test('getPositionForOffset control test', () {
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RenderParagraph paragraph = new RenderParagraph(new TextSpan(text: _kText));
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layout(paragraph);
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TextPosition position20 = paragraph.getPositionForOffset(new Offset(20.0, 5.0));
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expect(position20.offset, greaterThan(0.0));
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TextPosition position40 = paragraph.getPositionForOffset(new Offset(40.0, 5.0));
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expect(position40.offset, greaterThan(position20.offset));
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TextPosition positionBelow = paragraph.getPositionForOffset(new Offset(5.0, 20.0));
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expect(positionBelow.offset, greaterThan(position40.offset));
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});
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test('getBoxesForSelection control test', () {
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RenderParagraph paragraph = new RenderParagraph(new TextSpan(text: _kText));
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layout(paragraph);
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List<ui.TextBox> boxes = paragraph.getBoxesForSelection(
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new TextSelection(baseOffset: 5, extentOffset: 25)
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);
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expect(boxes.length, equals(1));
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boxes = paragraph.getBoxesForSelection(
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new TextSelection(baseOffset: 25, extentOffset: 50)
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);
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expect(boxes.length, equals(3));
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});
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test('getWordBoundary control test', () {
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RenderParagraph paragraph = new RenderParagraph(new TextSpan(text: _kText));
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layout(paragraph);
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TextRange range5 = paragraph.getWordBoundary(new TextPosition(offset: 5));
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expect(range5.textInside(_kText), equals('polished'));
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TextRange range50 = paragraph.getWordBoundary(new TextPosition(offset: 50));
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expect(range50.textInside(_kText), equals(' '));
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TextRange range85 = paragraph.getWordBoundary(new TextPosition(offset: 75));
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expect(range85.textInside(_kText), equals('Queen\'s'));
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});
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}
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