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// 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 'constants.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) {
final int plane = getPlane(entry.value);
if (plane == kUnprintablePlane.value) {
for (final String name in entry.webNames) {
lines.add(name, " '$name': ${toHex(entry.value, digits: 11)},");
}
}
}
return lines.sortedJoin().trimRight();
}
/// This generates the map of Web KeyboardEvent codes to physical key USB HID codes.
String get _webPhysicalKeyCodeMap {
final OutputLines<String> lines = OutputLines<String>('Web physical map');
for (final PhysicalKeyEntry entry in keyData.entries) {
if (entry.name != null) {
lines.add(entry.name,
" '${entry.name}': ${toHex(entry.usbHidCode)}, // ${entry.constantName}");
}
}
return lines.sortedJoin().trimRight();
}
/// This generates the map of Web number pad codes to logical key ids.
String get _webLogicalLocationMap {
final OutputLines<String> lines = OutputLines<String>('Web logical location map');
_logicalLocationMap.forEach((String webKey, List<String?> locations) {
final String valuesString = locations.map((String? value) {
return value == null ? 'null' : toHex(logicalData.entryByName(value).value, digits: 11);
}).join(', ');
final String namesString = locations.map((String? value) {
return value == null ? 'null' : logicalData.entryByName(value).constantName;
}).join(', ');
lines.add(webKey, " '$webKey': <int?>[$valuesString], // $namesString");
});
return lines.sortedJoin().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,
};
}
}