mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
314 lines
12 KiB
Dart
314 lines
12 KiB
Dart
// Copyright 2016 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 'dart:io';
|
|
import 'dart:ui' as ui show TextBox;
|
|
|
|
import 'package:flutter/rendering.dart';
|
|
import 'package:flutter/services.dart';
|
|
import 'package:flutter_test/flutter_test.dart';
|
|
|
|
import 'rendering_tester.dart';
|
|
|
|
const String _kText = 'I polished up that handle so carefullee\nThat now I am the Ruler of the Queen\'s Navee!';
|
|
|
|
void main() {
|
|
test('getOffsetForCaret control test', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(text: _kText),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph);
|
|
|
|
final Rect caret = new Rect.fromLTWH(0.0, 0.0, 2.0, 20.0);
|
|
|
|
final Offset offset5 = paragraph.getOffsetForCaret(const TextPosition(offset: 5), caret);
|
|
expect(offset5.dx, greaterThan(0.0));
|
|
|
|
final Offset offset25 = paragraph.getOffsetForCaret(const TextPosition(offset: 25), caret);
|
|
expect(offset25.dx, greaterThan(offset5.dx));
|
|
|
|
final Offset offset50 = paragraph.getOffsetForCaret(const TextPosition(offset: 50), caret);
|
|
expect(offset50.dy, greaterThan(offset5.dy));
|
|
});
|
|
|
|
test('getPositionForOffset control test', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(text: _kText),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph);
|
|
|
|
final TextPosition position20 = paragraph.getPositionForOffset(const Offset(20.0, 5.0));
|
|
expect(position20.offset, greaterThan(0.0));
|
|
|
|
final TextPosition position40 = paragraph.getPositionForOffset(const Offset(40.0, 5.0));
|
|
expect(position40.offset, greaterThan(position20.offset));
|
|
|
|
final TextPosition positionBelow = paragraph.getPositionForOffset(const Offset(5.0, 20.0));
|
|
expect(positionBelow.offset, greaterThan(position40.offset));
|
|
});
|
|
|
|
test('getBoxesForSelection control test', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(text: _kText, style: const TextStyle(fontSize: 10.0)),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph);
|
|
|
|
List<ui.TextBox> boxes = paragraph.getBoxesForSelection(
|
|
const TextSelection(baseOffset: 5, extentOffset: 25)
|
|
);
|
|
|
|
expect(boxes.length, equals(1));
|
|
|
|
boxes = paragraph.getBoxesForSelection(
|
|
const TextSelection(baseOffset: 25, extentOffset: 50)
|
|
);
|
|
|
|
expect(boxes.any((ui.TextBox box) => box.left == 250 && box.top == 0), isTrue);
|
|
expect(boxes.any((ui.TextBox box) => box.right == 100 && box.top == 10), isTrue);
|
|
},
|
|
// Ahem-based tests don't yet quite work on Windows or some MacOS environments
|
|
skip: Platform.isWindows || Platform.isMacOS);
|
|
|
|
test('getWordBoundary control test', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(text: _kText),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph);
|
|
|
|
final TextRange range5 = paragraph.getWordBoundary(const TextPosition(offset: 5));
|
|
expect(range5.textInside(_kText), equals('polished'));
|
|
|
|
final TextRange range50 = paragraph.getWordBoundary(const TextPosition(offset: 50));
|
|
expect(range50.textInside(_kText), equals(' '));
|
|
|
|
final TextRange range85 = paragraph.getWordBoundary(const TextPosition(offset: 75));
|
|
expect(range85.textInside(_kText), equals('Queen\'s'));
|
|
});
|
|
|
|
test('overflow test', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(
|
|
text: 'This\n' // 4 characters * 10px font size = 40px width on the first line
|
|
'is a wrapping test. It should wrap at manual newlines, and if softWrap is true, also at spaces.',
|
|
style: const TextStyle(fontFamily: 'Ahem', fontSize: 10.0),
|
|
),
|
|
textDirection: TextDirection.ltr,
|
|
maxLines: 1,
|
|
softWrap: true,
|
|
);
|
|
|
|
void relayoutWith({ int maxLines, bool softWrap, TextOverflow overflow }) {
|
|
paragraph
|
|
..maxLines = maxLines
|
|
..softWrap = softWrap
|
|
..overflow = overflow;
|
|
pumpFrame();
|
|
}
|
|
|
|
// Lay out in a narrow box to force wrapping.
|
|
layout(paragraph, constraints: const BoxConstraints(maxWidth: 50.0)); // enough to fit "This" but not "This is"
|
|
final double lineHeight = paragraph.size.height;
|
|
|
|
relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.clip);
|
|
expect(paragraph.size.height, equals(3 * lineHeight));
|
|
|
|
relayoutWith(maxLines: null, softWrap: true, overflow: TextOverflow.clip);
|
|
expect(paragraph.size.height, greaterThan(5 * lineHeight));
|
|
|
|
// Try again with ellipsis overflow. We can't test that the ellipsis are
|
|
// drawn, but we can test the sizing.
|
|
relayoutWith(maxLines: 1, softWrap: true, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(lineHeight));
|
|
|
|
relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(3 * lineHeight));
|
|
|
|
// This is the one weird case. If maxLines is null, we would expect to allow
|
|
// infinite wrapping. However, if we did, we'd never know when to append an
|
|
// ellipsis, so this really means "append ellipsis as soon as we exceed the
|
|
// width".
|
|
relayoutWith(maxLines: null, softWrap: true, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(2 * lineHeight));
|
|
|
|
// Now with no soft wrapping.
|
|
relayoutWith(maxLines: 1, softWrap: false, overflow: TextOverflow.clip);
|
|
expect(paragraph.size.height, equals(lineHeight));
|
|
|
|
relayoutWith(maxLines: 3, softWrap: false, overflow: TextOverflow.clip);
|
|
expect(paragraph.size.height, equals(2 * lineHeight));
|
|
|
|
relayoutWith(maxLines: null, softWrap: false, overflow: TextOverflow.clip);
|
|
expect(paragraph.size.height, equals(2 * lineHeight));
|
|
|
|
relayoutWith(maxLines: 1, softWrap: false, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(lineHeight));
|
|
|
|
relayoutWith(maxLines: 3, softWrap: false, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(3 * lineHeight));
|
|
|
|
relayoutWith(maxLines: null, softWrap: false, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.size.height, equals(2 * lineHeight));
|
|
|
|
// Test presence of the fade effect.
|
|
relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.fade);
|
|
expect(paragraph.debugHasOverflowShader, isTrue);
|
|
|
|
// Change back to ellipsis and check that the fade shader is cleared.
|
|
relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.ellipsis);
|
|
expect(paragraph.debugHasOverflowShader, isFalse);
|
|
|
|
relayoutWith(maxLines: 100, softWrap: true, overflow: TextOverflow.fade);
|
|
expect(paragraph.debugHasOverflowShader, isFalse);
|
|
});
|
|
|
|
test('maxLines', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(
|
|
text: 'How do you write like you\'re running out of time? Write day and night like you\'re running out of time?',
|
|
// 0123456789 0123456789 012 345 0123456 012345 01234 012345678 012345678 0123 012 345 0123456 012345 01234
|
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12
|
|
style: const TextStyle(fontFamily: 'Ahem', fontSize: 10.0),
|
|
),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0));
|
|
void layoutAt(int maxLines) {
|
|
paragraph.maxLines = maxLines;
|
|
pumpFrame();
|
|
}
|
|
|
|
layoutAt(null);
|
|
expect(paragraph.size.height, 130.0);
|
|
|
|
layoutAt(1);
|
|
expect(paragraph.size.height, 10.0);
|
|
|
|
layoutAt(2);
|
|
expect(paragraph.size.height, 20.0);
|
|
|
|
layoutAt(3);
|
|
expect(paragraph.size.height, 30.0);
|
|
}, skip: Platform.isWindows); // Ahem-based tests don't yet quite work on Windows
|
|
|
|
test('changing color does not do layout', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(
|
|
text: 'Hello',
|
|
style: const TextStyle(color: const Color(0xFF000000)),
|
|
),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0), phase: EnginePhase.paint);
|
|
expect(paragraph.debugNeedsLayout, isFalse);
|
|
expect(paragraph.debugNeedsPaint, isFalse);
|
|
paragraph.text = const TextSpan(
|
|
text: 'Hello World',
|
|
style: const TextStyle(color: const Color(0xFF000000)),
|
|
);
|
|
expect(paragraph.debugNeedsLayout, isTrue);
|
|
expect(paragraph.debugNeedsPaint, isFalse);
|
|
pumpFrame(phase: EnginePhase.paint);
|
|
expect(paragraph.debugNeedsLayout, isFalse);
|
|
expect(paragraph.debugNeedsPaint, isFalse);
|
|
paragraph.text = const TextSpan(
|
|
text: 'Hello World',
|
|
style: const TextStyle(color: const Color(0xFFFFFFFF)),
|
|
);
|
|
expect(paragraph.debugNeedsLayout, isFalse);
|
|
expect(paragraph.debugNeedsPaint, isTrue);
|
|
pumpFrame(phase: EnginePhase.paint);
|
|
expect(paragraph.debugNeedsLayout, isFalse);
|
|
expect(paragraph.debugNeedsPaint, isFalse);
|
|
});
|
|
|
|
test('nested TextSpans in paragraph handle textScaleFactor correctly.', () {
|
|
const TextSpan testSpan = const TextSpan(
|
|
text: 'a',
|
|
style: const TextStyle(
|
|
fontSize: 10.0,
|
|
),
|
|
children: const <TextSpan>[
|
|
const TextSpan(
|
|
text: 'b',
|
|
children: const <TextSpan>[
|
|
const TextSpan(text: 'c'),
|
|
],
|
|
style: const TextStyle(
|
|
fontSize: 20.0,
|
|
),
|
|
),
|
|
const TextSpan(
|
|
text: 'd',
|
|
),
|
|
],
|
|
);
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
testSpan,
|
|
textDirection: TextDirection.ltr,
|
|
textScaleFactor: 1.3
|
|
);
|
|
paragraph.layout(const BoxConstraints());
|
|
// anyOf is needed here because Linux and Mac have different text
|
|
// rendering widths in tests.
|
|
// TODO(#12357): Figure out why this is, and fix it (if needed) once Blink
|
|
// text rendering is replaced.
|
|
expect(paragraph.size.width, anyOf(79.0, 78.0));
|
|
expect(paragraph.size.height, 26.0);
|
|
|
|
// Test the sizes of nested spans.
|
|
final List<ui.TextBox> boxes = <ui.TextBox>[];
|
|
final String text = testSpan.toStringDeep();
|
|
for (int i = 0; i < text.length; ++i) {
|
|
boxes.addAll(paragraph.getBoxesForSelection(
|
|
new TextSelection(baseOffset: i, extentOffset: i + 1)
|
|
));
|
|
}
|
|
expect(boxes.length, equals(4));
|
|
|
|
// anyOf is needed here and below because Linux and Mac have different text
|
|
// rendering widths in tests.
|
|
// TODO(#12357): Figure out why this is, and fix it (if needed) once Blink
|
|
// text rendering is replaced.
|
|
expect(boxes[0].toRect().width, anyOf(14.0, 13.0));
|
|
expect(boxes[0].toRect().height, closeTo(13.0, 0.0001));
|
|
expect(boxes[1].toRect().width, anyOf(27.0, 26.0));
|
|
expect(boxes[1].toRect().height, closeTo(26.0, 0.0001));
|
|
expect(boxes[2].toRect().width, anyOf(27.0, 26.0));
|
|
expect(boxes[2].toRect().height, closeTo(26.0, 0.0001));
|
|
expect(boxes[3].toRect().width, anyOf(14.0, 13.0));
|
|
expect(boxes[3].toRect().height, closeTo(13.0, 0.0001));
|
|
});
|
|
|
|
test('toStringDeep', () {
|
|
final RenderParagraph paragraph = new RenderParagraph(
|
|
const TextSpan(text: _kText),
|
|
textDirection: TextDirection.ltr,
|
|
);
|
|
expect(paragraph, hasAGoodToStringDeep);
|
|
expect(
|
|
paragraph.toStringDeep(minLevel: DiagnosticLevel.info),
|
|
equalsIgnoringHashCodes(
|
|
'RenderParagraph#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n'
|
|
' │ parentData: MISSING\n'
|
|
' │ constraints: MISSING\n'
|
|
' │ size: MISSING\n'
|
|
' │ textAlign: start\n'
|
|
' │ textDirection: ltr\n'
|
|
' │ softWrap: wrapping at box width\n'
|
|
' │ overflow: clip\n'
|
|
' │ maxLines: unlimited\n'
|
|
' ╘═╦══ text ═══\n'
|
|
' ║ TextSpan:\n'
|
|
' ║ "I polished up that handle so carefullee\n'
|
|
' ║ That now I am the Ruler of the Queen\'s Navee!"\n'
|
|
' ╚═══════════\n'
|
|
),
|
|
);
|
|
});
|
|
}
|