blob: 546602ccb5732a518d7a3846982cc562381a0986 [file] [log] [blame]
// Copyright 2013 The Flutter 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:test/bootstrap/browser.dart';
import 'package:test/test.dart';
import 'package:ui/src/engine.dart';
import 'package:ui/ui.dart';
import 'html/paragraph/helper.dart';
import 'matchers.dart';
void main() {
internalBootstrapBrowserTest(() => testMain);
}
Future<void> testMain() async {
const double baselineRatio = 1.1662499904632568;
await initializeTestFlutterViewEmbedder();
late String fallback;
setUp(() {
if (operatingSystem == OperatingSystem.macOs ||
operatingSystem == OperatingSystem.iOs) {
if (isIOS15) {
fallback = 'BlinkMacSystemFont';
} else {
fallback = '-apple-system, BlinkMacSystemFont';
}
} else {
fallback = 'Arial';
}
});
test('predictably lays out a single-line paragraph', () {
for (final double fontSize in <double>[10.0, 20.0, 30.0, 40.0]) {
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'Ahem',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: fontSize,
));
builder.addText('Test');
final Paragraph paragraph = builder.build();
paragraph.layout(const ParagraphConstraints(width: 400.0));
expect(paragraph.height, fontSize);
expect(paragraph.width, 400.0);
expect(paragraph.minIntrinsicWidth, fontSize * 4.0);
expect(paragraph.maxIntrinsicWidth, fontSize * 4.0);
expect(paragraph.alphabeticBaseline, fontSize * .8);
expect(
paragraph.ideographicBaseline,
within(
distance: 0.001,
from: paragraph.alphabeticBaseline * baselineRatio),
);
}
});
test('predictably lays out a multi-line paragraph', () {
for (final double fontSize in <double>[10.0, 20.0, 30.0, 40.0]) {
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'Ahem',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: fontSize,
));
builder.addText('Test Ahem');
final Paragraph paragraph = builder.build();
paragraph.layout(ParagraphConstraints(width: fontSize * 5.0));
expect(paragraph.height, fontSize * 2.0); // because it wraps
expect(paragraph.width, fontSize * 5.0);
expect(paragraph.minIntrinsicWidth, fontSize * 4.0);
// TODO(yjbanov): due to https://github.com/flutter/flutter/issues/21965
// Flutter reports a different number. Ours is correct
// though.
expect(paragraph.maxIntrinsicWidth, fontSize * 9.0);
expect(paragraph.alphabeticBaseline, fontSize * .8);
expect(
paragraph.ideographicBaseline,
within(
distance: 0.001,
from: paragraph.alphabeticBaseline * baselineRatio),
);
}
});
test('lay out unattached paragraph', () {
final CanvasParagraph paragraph = plain(EngineParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 14.0,
), 'How do you do this fine morning?');
expect(paragraph.height, 0.0);
expect(paragraph.width, -1.0);
expect(paragraph.minIntrinsicWidth, 0.0);
expect(paragraph.maxIntrinsicWidth, 0.0);
expect(paragraph.alphabeticBaseline, -1.0);
expect(paragraph.ideographicBaseline, -1.0);
paragraph.layout(const ParagraphConstraints(width: 60.0));
expect(paragraph.height, greaterThan(0.0));
expect(paragraph.width, greaterThan(0.0));
expect(paragraph.minIntrinsicWidth, greaterThan(0.0));
expect(paragraph.maxIntrinsicWidth, greaterThan(0.0));
expect(paragraph.minIntrinsicWidth, lessThan(paragraph.maxIntrinsicWidth));
expect(paragraph.alphabeticBaseline, greaterThan(0.0));
expect(paragraph.ideographicBaseline, greaterThan(0.0));
});
Paragraph measure(
{String text = 'Hello', double fontSize = 14.0, double width = 50.0}) {
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: fontSize,
));
builder.addText(text);
final Paragraph paragraph = builder.build();
paragraph.layout(ParagraphConstraints(width: width));
return paragraph;
}
test('baseline increases with font size', () {
Paragraph previousParagraph = measure(fontSize: 10.0);
for (int i = 0; i < 6; i++) {
final double fontSize = 20.0 + 10.0 * i;
final Paragraph paragraph = measure(fontSize: fontSize);
expect(paragraph.alphabeticBaseline,
greaterThan(previousParagraph.alphabeticBaseline));
expect(paragraph.ideographicBaseline,
greaterThan(previousParagraph.ideographicBaseline));
previousParagraph = paragraph;
}
});
test('baseline does not depend on text', () {
final Paragraph golden = measure(fontSize: 30.0);
for (int i = 1; i < 30; i++) {
final Paragraph paragraph = measure(text: 'hello ' * i, fontSize: 30.0);
expect(paragraph.alphabeticBaseline, golden.alphabeticBaseline);
expect(paragraph.ideographicBaseline, golden.ideographicBaseline);
}
});
test('$ParagraphBuilder detects plain text', () {
ParagraphBuilder builder = ParagraphBuilder(EngineParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 15.0,
));
builder.addText('hi');
CanvasParagraph paragraph = builder.build() as CanvasParagraph;
expect(paragraph.plainText, isNotNull);
expect(paragraph.paragraphStyle.fontWeight, FontWeight.normal);
builder = ParagraphBuilder(EngineParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 15.0,
));
builder.pushStyle(TextStyle(fontWeight: FontWeight.bold));
builder.addText('hi');
paragraph = builder.build() as CanvasParagraph;
expect(paragraph.plainText, isNotNull);
});
test('$ParagraphBuilder detects rich text', () {
final ParagraphBuilder builder = ParagraphBuilder(EngineParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 15.0,
));
builder.addText('h');
builder.pushStyle(TextStyle(fontWeight: FontWeight.bold));
builder.addText('i');
final CanvasParagraph paragraph = builder.build() as CanvasParagraph;
expect(paragraph.plainText, 'hi');
});
test('$ParagraphBuilder treats empty text as plain', () {
final ParagraphBuilder builder = ParagraphBuilder(EngineParagraphStyle(
fontFamily: 'sans-serif',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 15.0,
));
builder.pushStyle(TextStyle(fontWeight: FontWeight.bold));
final CanvasParagraph paragraph = builder.build() as CanvasParagraph;
expect(paragraph.plainText, '');
});
// Regression test for https://github.com/flutter/flutter/issues/38972
test(
'should not set fontFamily to effectiveFontFamily for spans in rich text',
() {
final ParagraphBuilder builder = ParagraphBuilder(EngineParagraphStyle(
fontFamily: 'Roboto',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: 15.0,
));
builder
.pushStyle(TextStyle(fontFamily: 'Menlo', fontWeight: FontWeight.bold));
const String firstSpanText = 'abc';
builder.addText(firstSpanText);
builder.pushStyle(TextStyle(fontSize: 30.0, fontWeight: FontWeight.normal));
const String secondSpanText = 'def';
builder.addText(secondSpanText);
final CanvasParagraph paragraph = builder.build() as CanvasParagraph;
paragraph.layout(const ParagraphConstraints(width: 800.0));
expect(paragraph.plainText, 'abcdef');
final List<DomElement> spans =
paragraph.toDomElement().querySelectorAll('flt-span').toList();
expect(spans[0].style.fontFamily, 'Ahem, $fallback, sans-serif');
// The nested span here should not set it's family to default sans-serif.
expect(spans[1].style.fontFamily, 'Ahem, $fallback, sans-serif');
},
// TODO(mdebbar): https://github.com/flutter/flutter/issues/50771
// TODO(mdebbar): https://github.com/flutter/flutter/issues/46638
skip: browserEngine == BrowserEngine.firefox ||
browserEngine == BrowserEngine.edge);
test('adds Arial and sans-serif as fallback fonts', () {
// Set this to false so it doesn't default to 'Ahem' font.
debugEmulateFlutterTesterEnvironment = false;
final CanvasParagraph paragraph = plain(EngineParagraphStyle(
fontFamily: 'SomeFont',
fontSize: 12.0,
), 'Hello');
paragraph.layout(constrain(double.infinity));
expect(paragraph.toDomElement().children.single.style.fontFamily,
'SomeFont, $fallback, sans-serif');
debugEmulateFlutterTesterEnvironment = true;
},
// TODO(mdebbar): https://github.com/flutter/flutter/issues/50771
// TODO(mdebbar): https://github.com/flutter/flutter/issues/46638
skip: browserEngine == BrowserEngine.firefox ||
browserEngine == BrowserEngine.edge);
test('does not add fallback fonts to generic families', () {
// Set this to false so it doesn't default to 'Ahem' font.
debugEmulateFlutterTesterEnvironment = false;
final CanvasParagraph paragraph = plain(EngineParagraphStyle(
fontFamily: 'serif',
fontSize: 12.0,
), 'Hello');
paragraph.layout(constrain(double.infinity));
expect(paragraph.toDomElement().children.single.style.fontFamily, 'serif');
debugEmulateFlutterTesterEnvironment = true;
});
test('can set font families that need to be quoted', () {
// Set this to false so it doesn't default to 'Ahem' font.
debugEmulateFlutterTesterEnvironment = false;
final CanvasParagraph paragraph = plain(EngineParagraphStyle(
fontFamily: 'MyFont 2000',
fontSize: 12.0,
), 'Hello');
paragraph.layout(constrain(double.infinity));
expect(paragraph.toDomElement().children.single.style.fontFamily,
'"MyFont 2000", $fallback, sans-serif');
debugEmulateFlutterTesterEnvironment = true;
},
// TODO(mdebbar): https://github.com/flutter/flutter/issues/50771
skip: browserEngine == BrowserEngine.edge);
group('TextRange', () {
test('empty ranges are correct', () {
const TextRange range = TextRange(start: -1, end: -1);
expect(range, equals(const TextRange.collapsed(-1)));
expect(range, equals(TextRange.empty));
});
test('isValid works', () {
expect(TextRange.empty.isValid, isFalse);
expect(const TextRange(start: 0, end: 0).isValid, isTrue);
expect(const TextRange(start: 0, end: 10).isValid, isTrue);
expect(const TextRange(start: 10, end: 10).isValid, isTrue);
expect(const TextRange(start: -1, end: 10).isValid, isFalse);
expect(const TextRange(start: 10, end: 0).isValid, isTrue);
expect(const TextRange(start: 10, end: -1).isValid, isFalse);
});
test('isCollapsed works', () {
expect(TextRange.empty.isCollapsed, isTrue);
expect(const TextRange(start: 0, end: 0).isCollapsed, isTrue);
expect(const TextRange(start: 0, end: 10).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: 10).isCollapsed, isTrue);
expect(const TextRange(start: -1, end: 10).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: 0).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: -1).isCollapsed, isFalse);
});
test('isNormalized works', () {
expect(TextRange.empty.isNormalized, isTrue);
expect(const TextRange(start: 0, end: 0).isNormalized, isTrue);
expect(const TextRange(start: 0, end: 10).isNormalized, isTrue);
expect(const TextRange(start: 10, end: 10).isNormalized, isTrue);
expect(const TextRange(start: -1, end: 10).isNormalized, isTrue);
expect(const TextRange(start: 10, end: 0).isNormalized, isFalse);
expect(const TextRange(start: 10, end: -1).isNormalized, isFalse);
});
test('textBefore works', () {
expect(const TextRange(start: 0, end: 0).textBefore('hello'), isEmpty);
expect(
const TextRange(start: 1, end: 1).textBefore('hello'), equals('h'));
expect(
const TextRange(start: 1, end: 2).textBefore('hello'), equals('h'));
expect(const TextRange(start: 5, end: 5).textBefore('hello'),
equals('hello'));
expect(const TextRange(start: 0, end: 5).textBefore('hello'), isEmpty);
});
test('textAfter works', () {
expect(const TextRange(start: 0, end: 0).textAfter('hello'),
equals('hello'));
expect(
const TextRange(start: 1, end: 1).textAfter('hello'), equals('ello'));
expect(
const TextRange(start: 1, end: 2).textAfter('hello'), equals('llo'));
expect(const TextRange(start: 5, end: 5).textAfter('hello'), isEmpty);
expect(const TextRange(start: 0, end: 5).textAfter('hello'), isEmpty);
});
test('textInside works', () {
expect(const TextRange(start: 0, end: 0).textInside('hello'), isEmpty);
expect(const TextRange(start: 1, end: 1).textInside('hello'), isEmpty);
expect(
const TextRange(start: 1, end: 2).textInside('hello'), equals('e'));
expect(const TextRange(start: 5, end: 5).textInside('hello'), isEmpty);
expect(const TextRange(start: 0, end: 5).textInside('hello'),
equals('hello'));
});
});
}