mirror of
https://github.com/flutter/flutter.git
synced 2025-06-03 00:51:18 +00:00
72 lines
2.4 KiB
Dart
72 lines
2.4 KiB
Dart
// 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 'dart:io';
|
|
import 'package:path/path.dart' as path;
|
|
|
|
import 'key_data.dart';
|
|
import 'utils.dart';
|
|
|
|
String _injectDictionary(String template, Map<String, String> dictionary) {
|
|
String result = template;
|
|
for (final String key in dictionary.keys) {
|
|
result = result.replaceAll('@@@$key@@@', dictionary[key]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// Generates a file based on the information in the key data structure given to
|
|
/// it.
|
|
///
|
|
/// [BaseCodeGenerator] finds tokens in the template file that has the form of
|
|
/// `@@@TOKEN@@@`, and replace them by looking up the key `TOKEN` from the map
|
|
/// returned by [mappings].
|
|
///
|
|
/// Subclasses must implement [templatePath] and [mappings].
|
|
abstract class BaseCodeGenerator {
|
|
/// Create a code generator while providing [keyData] to be used in [mappings].
|
|
BaseCodeGenerator(this.keyData);
|
|
|
|
/// Absolute path to the template file that this file is generated on.
|
|
String get templatePath;
|
|
|
|
/// A mapping from tokens to be replaced in the template to the result string.
|
|
Map<String, String> mappings();
|
|
|
|
/// Substitutes the various platform specific maps into the template file for
|
|
/// keyboard_maps.dart.
|
|
String generate() {
|
|
final String template = File(templatePath).readAsStringSync();
|
|
return _injectDictionary(template, mappings());
|
|
}
|
|
|
|
/// The database of keys loaded from disk.
|
|
final KeyData keyData;
|
|
}
|
|
|
|
/// A code generator which also defines platform-based behavior.
|
|
abstract class PlatformCodeGenerator extends BaseCodeGenerator {
|
|
PlatformCodeGenerator(KeyData keyData) : super(keyData);
|
|
|
|
// Used by platform code generators.
|
|
List<Key> get numpadKeyData {
|
|
return keyData.data.where((Key entry) {
|
|
return entry.constantName.startsWith('numpad') && entry.keyLabel != null;
|
|
}).toList();
|
|
}
|
|
|
|
// Used by platform code generators.
|
|
List<Key> get functionKeyData {
|
|
final RegExp functionKeyRe = RegExp(r'^f[0-9]+$');
|
|
return keyData.data.where((Key entry) {
|
|
return functionKeyRe.hasMatch(entry.constantName);
|
|
}).toList();
|
|
}
|
|
|
|
/// Absolute path to the output file.
|
|
///
|
|
/// How this value will be used is based on the callee.
|
|
String outputPath(String platform) => path.join(flutterRoot.path, '..', path.join('engine', 'src', 'flutter', 'shell', 'platform', platform, 'keycodes', 'keyboard_map_$platform.h'));
|
|
}
|