// Copyright 2014 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. // The utility function `encodeKnArbFiles` replaces the material_kn.arb // and cupertino_kn.arb files in flutter_localizations/packages/lib/src/l10n // with versions where the contents of the localized strings have been // replaced by JSON escapes. This is done because some of those strings // contain characters that can crash Emacs on Linux. There is more information // here: https://github.com/flutter/flutter/issues/36704 and in the README // in flutter_localizations/packages/lib/src/l10n. // // This utility is run by `gen_localizations.dart` if --overwrite is passed // in as an option. // @dart = 2.8 import 'dart:convert'; import 'dart:io'; import 'package:path/path.dart' as path; import '../localizations_utils.dart'; Map<String, dynamic> _loadBundle(File file) { if (!FileSystemEntity.isFileSync(file.path)) exitWithError('Unable to find input file: ${file.path}'); return json.decode(file.readAsStringSync()) as Map<String, dynamic>; } void _encodeBundleTranslations(Map<String, dynamic> bundle) { for (final String key in bundle.keys) { // The ARB file resource "attributes" for foo are called @foo. Don't need // to encode them. if (key.startsWith('@')) continue; final String translation = bundle[key] as String; // Rewrite the string as a series of unicode characters in JSON format. // Like "\u0012\u0123\u1234". bundle[key] = translation.runes.map((int code) { final String codeString = '00${code.toRadixString(16)}'; return '\\u${codeString.substring(codeString.length - 4)}'; }).join(); } } void _checkEncodedTranslations(Map<String, dynamic> encodedBundle, Map<String, dynamic> bundle) { bool errorFound = false; const JsonDecoder decoder = JsonDecoder(); for (final String key in bundle.keys) { if (decoder.convert('"${encodedBundle[key]}"') != bundle[key]) { stderr.writeln(' encodedTranslation for $key does not match original value "${bundle[key]}"'); errorFound = true; } } if (errorFound) exitWithError('JSON unicode translation encoding failed'); } void _rewriteBundle(File file, Map<String, dynamic> bundle) { final StringBuffer contents = StringBuffer(); contents.writeln('{'); for (final String key in bundle.keys) { contents.writeln(' "$key": "${bundle[key]}"${key == bundle.keys.last ? '' : ','}'); } contents.writeln('}'); file.writeAsStringSync(contents.toString()); } void encodeKnArbFiles(Directory directory) { final File materialArbFile = File(path.join(directory.path, 'material_kn.arb')); final File cupertinoArbFile = File(path.join(directory.path, 'cupertino_kn.arb')); final Map<String, dynamic> materialBundle = _loadBundle(materialArbFile); final Map<String, dynamic> cupertinoBundle = _loadBundle(cupertinoArbFile); _encodeBundleTranslations(materialBundle); _encodeBundleTranslations(cupertinoBundle); _checkEncodedTranslations(materialBundle, _loadBundle(materialArbFile)); _checkEncodedTranslations(cupertinoBundle, _loadBundle(cupertinoArbFile)); _rewriteBundle(materialArbFile, materialBundle); _rewriteBundle(cupertinoArbFile, cupertinoBundle); }