Tizian 「ティツィアーン」
80fa7b9628
A pub workspace of the Dart packages Halkyon's apps share: halkyon_ui, Halkyon's look (the theme, fonts, layout and shared widgets, with texts in English and German), halkyon_core's low-level primitives and halkyon_interop's cross-app contracts. Dart 3.13 with LeanCode's lints, configured once at the root; apps take a package by git, pinned to a signed commit. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
89 lines
3.1 KiB
Dart
89 lines
3.1 KiB
Dart
import 'dart:ui' as ui;
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import 'package:flutter/services.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:halkyon_ui/halkyon_ui.dart';
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import 'package:material_ui/material_ui.dart';
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/// How many pixels [text] inks in [family] at [weight]: heavier strokes ink
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/// more.
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Future<int> ink(String text, String family, FontWeight weight) async {
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final painter = TextPainter(
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text: TextSpan(
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text: text,
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style: TextStyle(
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fontFamily: family,
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fontSize: 40,
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fontWeight: weight,
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color: const Color(0xFF000000),
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),
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),
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textDirection: TextDirection.ltr,
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)..layout();
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final recorder = ui.PictureRecorder();
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painter.paint(Canvas(recorder), Offset.zero);
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final image = await recorder.endRecording().toImage(
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painter.width.ceil(),
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painter.height.ceil(),
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);
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final pixels = (await image.toByteData())!;
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var inked = 0;
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for (var alpha = 3; alpha < pixels.lengthInBytes; alpha += 4) {
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if (pixels.getUint8(alpha) > 128) {
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inked++;
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}
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}
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return inked;
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}
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void main() {
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TestWidgetsFlutterBinding.ensureInitialized();
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test("the font is the package's own, as an app finds a package's font", () {
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expect(appFontFamily, 'packages/halkyon_ui/Noto Sans');
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});
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test("the theme sets text in Noto Sans, with the apps' CJK fonts for what "
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'it lacks, named as an app declares them', () {
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for (final brightness in Brightness.values) {
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final style = appTheme(brightness).textTheme.bodyLarge!;
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expect(style.fontFamily, appFontFamily);
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expect(style.fontFamilyFallback, [
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'Noto Sans JP',
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'Noto Sans SC',
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'Noto Sans TC',
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'Noto Sans KR',
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]);
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}
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});
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test("a language's own CJK font comes first, so shared Han characters "
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'take its shapes', () {
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expect(appFontFallbackFor(null).first, 'Noto Sans JP');
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expect(appFontFallbackFor('en'), appFontFallback);
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expect(appFontFallbackFor('ja').first, 'Noto Sans JP');
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expect(appFontFallbackFor('zh-Hans').first, 'Noto Sans SC');
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expect(appFontFallbackFor('zh').first, 'Noto Sans SC');
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expect(appFontFallbackFor('zh-Hant').first, 'Noto Sans TC');
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expect(appFontFallbackFor('zh-TW').first, 'Noto Sans TC');
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expect(appFontFallbackFor('ko').first, 'Noto Sans KR');
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expect(hasOwnFont('ko'), isTrue);
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expect(hasOwnFont('de'), isFalse);
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// Every font stays, once.
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expect(appFontFallbackFor('ko').toSet(), appFontFallback.toSet());
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expect(appFontFallbackFor('ko'), hasLength(4));
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});
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test('Noto Sans draws every weight from its one file', () async {
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// In this package's own tests it is the root project, whose assets have
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// no `packages/` prefix; an app's test of the name is in example/.
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final loader = FontLoader(appFontFamily)
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..addFont(rootBundle.load('assets/fonts/NotoSans-Variable.ttf'));
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await loader.load();
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const text = 'Ἀθῆναι Halkyon';
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final regular = await ink(text, appFontFamily, FontWeight.w400);
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final bold = await ink(text, appFontFamily, FontWeight.w700);
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expect(bold, greaterThan(regular * 1.2));
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});
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}
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