| // 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 'dart:convert' show jsonDecode; |
| import 'dart:io' as io; |
| |
| import 'package:args/command_runner.dart'; |
| import 'package:http/http.dart' as http; |
| import 'package:path/path.dart' as path; |
| |
| import 'environment.dart'; |
| import 'exceptions.dart'; |
| import 'utils.dart'; |
| |
| class GenerateFallbackFontDataCommand extends Command<bool> |
| with ArgUtils<bool> { |
| GenerateFallbackFontDataCommand() { |
| argParser.addOption( |
| 'key', |
| defaultsTo: '', |
| help: 'The Google Fonts API key. Used to get data about fonts hosted on ' |
| 'Google Fonts.', |
| ); |
| argParser.addFlag( |
| 'download-test-fonts', |
| defaultsTo: true, |
| help: 'Whether to download the Noto fonts into a local folder to use in' |
| 'tests.', |
| ); |
| } |
| |
| @override |
| final String name = 'generate-fallback-font-data'; |
| |
| @override |
| final String description = 'Generate fallback font data from GoogleFonts'; |
| |
| String get apiKey => stringArg('key'); |
| |
| bool get downloadTestFonts => boolArg('download-test-fonts'); |
| |
| @override |
| Future<bool> run() async { |
| await _generateFallbackFontData(); |
| return true; |
| } |
| |
| Future<void> _generateFallbackFontData() async { |
| if (apiKey.isEmpty) { |
| throw UsageException('No Google Fonts API key provided', argParser.usage); |
| } |
| final http.Client client = http.Client(); |
| final http.Response response = await client.get(Uri.parse( |
| 'https://www.googleapis.com/webfonts/v1/webfonts?key=$apiKey')); |
| if (response.statusCode != 200) { |
| throw ToolExit('Failed to download Google Fonts list.'); |
| } |
| final Map<String, dynamic> googleFontsResult = |
| jsonDecode(response.body) as Map<String, dynamic>; |
| final List<Map<String, dynamic>> fontDatas = |
| (googleFontsResult['items'] as List<dynamic>) |
| .cast<Map<String, dynamic>>(); |
| final Map<String, Uri> urlForFamily = <String, Uri>{}; |
| for (final Map<String, dynamic> fontData in fontDatas) { |
| if (fallbackFonts.contains(fontData['family'])) { |
| final Uri uri = Uri.parse(fontData['files']['regular'] as String).replace(scheme: 'https'); |
| urlForFamily[fontData['family'] as String] = uri; |
| } |
| } |
| final Map<String, String> charsetForFamily = <String, String>{}; |
| final io.Directory fontDir = downloadTestFonts |
| ? await io.Directory(path.join( |
| environment.webUiBuildDir.path, |
| 'assets', |
| 'noto', |
| )).create(recursive: true) |
| : await io.Directory.systemTemp.createTemp('fonts'); |
| // Delete old fonts in the font directory. |
| await for (final io.FileSystemEntity file in fontDir.list()) { |
| await file.delete(); |
| } |
| for (final String family in fallbackFonts) { |
| print('Downloading $family...'); |
| final Uri uri = urlForFamily[family]!; |
| final http.Response fontResponse = await client.get(uri); |
| if (fontResponse.statusCode != 200) { |
| throw ToolExit('Failed to download font for $family'); |
| } |
| final io.File fontFile = |
| io.File(path.join(fontDir.path, path.basename(uri.path))); |
| await fontFile.writeAsBytes(fontResponse.bodyBytes); |
| final io.ProcessResult fcQueryResult = |
| await io.Process.run('fc-query', <String>[ |
| '--format=%{charset}', |
| '--', |
| fontFile.path, |
| ]); |
| final String encodedCharset = fcQueryResult.stdout as String; |
| charsetForFamily[family] = encodedCharset; |
| } |
| |
| final StringBuffer sb = StringBuffer(); |
| |
| sb.writeln('// Copyright 2013 The Flutter Authors. All rights reserved.'); |
| sb.writeln('// Use of this source code is governed by a BSD-style license ' |
| 'that can be'); |
| sb.writeln('// found in the LICENSE file.'); |
| sb.writeln(); |
| sb.writeln('// DO NOT EDIT! This file is generated. See:'); |
| sb.writeln('// dev/generate_fallback_font_data.dart'); |
| sb.writeln("import 'noto_font.dart';"); |
| sb.writeln(); |
| sb.writeln('final List<NotoFont> fallbackFonts = <NotoFont>['); |
| for (final String family in fallbackFonts) { |
| sb.write(" NotoFont.fromFlatRanges('$family', '${urlForFamily[family]!}', " |
| '<int>['); |
| for (final String range in charsetForFamily[family]!.split(' ')) { |
| String? start; |
| String? end; |
| final List<String> parts = range.split('-'); |
| if (parts.length == 1) { |
| start = parts[0]; |
| end = parts[0]; |
| } else { |
| start = parts[0]; |
| end = parts[1]; |
| } |
| sb.write('0x$start,0x$end,'); |
| } |
| sb.writeln(']),'); |
| } |
| sb.writeln('];'); |
| |
| final io.File fontDataFile = io.File(path.join( |
| environment.webUiRootDir.path, |
| 'lib', |
| 'src', |
| 'engine', |
| 'canvaskit', |
| 'font_fallback_data.dart', |
| )); |
| await fontDataFile.writeAsString(sb.toString()); |
| } |
| } |
| |
| const List<String> fallbackFonts = <String>[ |
| 'Noto Sans', |
| 'Noto Emoji', |
| 'Noto Sans Symbols', |
| 'Noto Sans Symbols 2', |
| 'Noto Sans Adlam', |
| 'Noto Sans Anatolian Hieroglyphs', |
| 'Noto Sans Arabic', |
| 'Noto Sans Armenian', |
| 'Noto Sans Avestan', |
| 'Noto Sans Balinese', |
| 'Noto Sans Bamum', |
| 'Noto Sans Bassa Vah', |
| 'Noto Sans Batak', |
| 'Noto Sans Bengali', |
| 'Noto Sans Bhaiksuki', |
| 'Noto Sans Brahmi', |
| 'Noto Sans Buginese', |
| 'Noto Sans Buhid', |
| 'Noto Sans Canadian Aboriginal', |
| 'Noto Sans Carian', |
| 'Noto Sans Caucasian Albanian', |
| 'Noto Sans Chakma', |
| 'Noto Sans Cham', |
| 'Noto Sans Cherokee', |
| 'Noto Sans Coptic', |
| 'Noto Sans Cuneiform', |
| 'Noto Sans Cypriot', |
| 'Noto Sans Deseret', |
| 'Noto Sans Devanagari', |
| 'Noto Sans Duployan', |
| 'Noto Sans Egyptian Hieroglyphs', |
| 'Noto Sans Elbasan', |
| 'Noto Sans Elymaic', |
| 'Noto Sans Georgian', |
| 'Noto Sans Glagolitic', |
| 'Noto Sans Gothic', |
| 'Noto Sans Grantha', |
| 'Noto Sans Gujarati', |
| 'Noto Sans Gunjala Gondi', |
| 'Noto Sans Gurmukhi', |
| 'Noto Sans HK', |
| 'Noto Sans Hanunoo', |
| 'Noto Sans Hatran', |
| 'Noto Sans Hebrew', |
| 'Noto Sans Imperial Aramaic', |
| 'Noto Sans Indic Siyaq Numbers', |
| 'Noto Sans Inscriptional Pahlavi', |
| 'Noto Sans Inscriptional Parthian', |
| 'Noto Sans JP', |
| 'Noto Sans Javanese', |
| 'Noto Sans KR', |
| 'Noto Sans Kaithi', |
| 'Noto Sans Kannada', |
| 'Noto Sans Kayah Li', |
| 'Noto Sans Kharoshthi', |
| 'Noto Sans Khmer', |
| 'Noto Sans Khojki', |
| 'Noto Sans Khudawadi', |
| 'Noto Sans Lao', |
| 'Noto Sans Lepcha', |
| 'Noto Sans Limbu', |
| 'Noto Sans Linear A', |
| 'Noto Sans Linear B', |
| 'Noto Sans Lisu', |
| 'Noto Sans Lycian', |
| 'Noto Sans Lydian', |
| 'Noto Sans Mahajani', |
| 'Noto Sans Malayalam', |
| 'Noto Sans Mandaic', |
| 'Noto Sans Manichaean', |
| 'Noto Sans Marchen', |
| 'Noto Sans Masaram Gondi', |
| 'Noto Sans Math', |
| 'Noto Sans Mayan Numerals', |
| 'Noto Sans Medefaidrin', |
| 'Noto Sans Meetei Mayek', |
| 'Noto Sans Meroitic', |
| 'Noto Sans Miao', |
| 'Noto Sans Modi', |
| 'Noto Sans Mongolian', |
| 'Noto Sans Mro', |
| 'Noto Sans Multani', |
| 'Noto Sans Myanmar', |
| 'Noto Sans N Ko', |
| 'Noto Sans Nabataean', |
| 'Noto Sans New Tai Lue', |
| 'Noto Sans Newa', |
| 'Noto Sans Nushu', |
| 'Noto Sans Ogham', |
| 'Noto Sans Ol Chiki', |
| 'Noto Sans Old Hungarian', |
| 'Noto Sans Old Italic', |
| 'Noto Sans Old North Arabian', |
| 'Noto Sans Old Permic', |
| 'Noto Sans Old Persian', |
| 'Noto Sans Old Sogdian', |
| 'Noto Sans Old South Arabian', |
| 'Noto Sans Old Turkic', |
| 'Noto Sans Oriya', |
| 'Noto Sans Osage', |
| 'Noto Sans Osmanya', |
| 'Noto Sans Pahawh Hmong', |
| 'Noto Sans Palmyrene', |
| 'Noto Sans Pau Cin Hau', |
| 'Noto Sans Phags Pa', |
| 'Noto Sans Phoenician', |
| 'Noto Sans Psalter Pahlavi', |
| 'Noto Sans Rejang', |
| 'Noto Sans Runic', |
| 'Noto Sans SC', |
| 'Noto Sans Saurashtra', |
| 'Noto Sans Sharada', |
| 'Noto Sans Shavian', |
| 'Noto Sans Siddham', |
| 'Noto Sans Sinhala', |
| 'Noto Sans Sogdian', |
| 'Noto Sans Sora Sompeng', |
| 'Noto Sans Soyombo', |
| 'Noto Sans Sundanese', |
| 'Noto Sans Syloti Nagri', |
| 'Noto Sans Syriac', |
| 'Noto Sans TC', |
| 'Noto Sans Tagalog', |
| 'Noto Sans Tagbanwa', |
| 'Noto Sans Tai Le', |
| 'Noto Sans Tai Tham', |
| 'Noto Sans Tai Viet', |
| 'Noto Sans Takri', |
| 'Noto Sans Tamil', |
| 'Noto Sans Tamil Supplement', |
| 'Noto Sans Telugu', |
| 'Noto Sans Thaana', |
| 'Noto Sans Thai', |
| 'Noto Sans Tifinagh', |
| 'Noto Sans Tirhuta', |
| 'Noto Sans Ugaritic', |
| 'Noto Sans Vai', |
| 'Noto Sans Wancho', |
| 'Noto Sans Warang Citi', |
| 'Noto Sans Yi', |
| 'Noto Sans Zanabazar Square', |
| ]; |