// 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. import 'package:path/path.dart' as path; import 'base_code_gen.dart'; import 'logical_key_data.dart'; import 'physical_key_data.dart'; import 'utils.dart'; /// Generates the key mapping for Web, based on the information in the key /// data structure given to it. class WebCodeGenerator extends PlatformCodeGenerator { WebCodeGenerator( PhysicalKeyData keyData, LogicalKeyData logicalData, String logicalLocationMap, ) : _logicalLocationMap = parseMapOfListOfNullableString(logicalLocationMap), super(keyData, logicalData); /// This generates the map of Web KeyboardEvent codes to logical key ids. String get _webLogicalKeyCodeMap { final OutputLines<String> lines = OutputLines<String>('Web logical map'); for (final LogicalKeyEntry entry in logicalData.entries) { for (final String name in entry.webNames) { lines.add(name, " '$name': ${toHex(entry.value, digits: 11)},"); } } return lines.sortedJoin().trimRight(); } /// This generates the map of Web KeyboardEvent codes to physical key USB HID codes. String get _webPhysicalKeyCodeMap { final StringBuffer result = StringBuffer(); for (final PhysicalKeyEntry entry in keyData.entries) { if (entry.name != null) { result.writeln(" '${entry.name}': ${toHex(entry.usbHidCode)},"); } } return result.toString().trimRight(); } /// This generates the map of Web number pad codes to logical key ids. String get _webLogicalLocationMap { final StringBuffer result = StringBuffer(); _logicalLocationMap.forEach((String webKey, List<String?> locations) { final String valuesString = locations.map((String? value) { return value == null ? 'null' : toHex(logicalData.entryByName(value).value, digits: 10); }).join(', '); result.writeln(" '$webKey': <int?>[$valuesString],"); }); return result.toString().trimRight(); } final Map<String, List<String?>> _logicalLocationMap; @override String get templatePath => path.join(dataRoot, 'web_key_map_dart.tmpl'); @override String outputPath(String platform) => path.join(PlatformCodeGenerator.engineRoot, 'lib', 'web_ui', 'lib', 'src', 'engine', 'key_map.dart'); @override Map<String, String> mappings() { return <String, String>{ 'WEB_LOGICAL_KEY_CODE_MAP': _webLogicalKeyCodeMap, 'WEB_PHYSICAL_KEY_CODE_MAP': _webPhysicalKeyCodeMap, 'WEB_LOGICAL_LOCATION_MAP': _webLogicalLocationMap, }; } }