Migrate to GSettings 0.2

lib/services/settings_service.dart

@@ -1,14 +1,17 @@
 import 'dart:ui';
 
+import 'package:dbus/dbus.dart';
 import 'package:gsettings/gsettings.dart';
 
 class SettingsService {
   final _settings = <String, Settings?>{};
 
   Settings? lookup(String schemaId, {String? path}) {
-    return _settings[schemaId] ??= GSettingsSchema.lookup(schemaId) != null
-        ? Settings(schemaId, path: path)
-        : null;
+    try {
+      return _settings[schemaId] ??= Settings(schemaId, path: path);
+    } on GSettingsSchemaNotInstalledException catch (_) {
+      return null;
+    }
   }
 
   void dispose() {
@@ -20,9 +23,16 @@ class SettingsService {
 
 class Settings {
   Settings(String schemaId, {String? path})
-      : _settings = GSettings(schemaId: schemaId, path: path);
+      : _settings = GSettings(schemaId, path: path) {
+    _settings.keysChanged.listen((keys) {
+      for (final key in keys) {
+        _updateValue(key);
+      }
+    });
+  }
 
   final GSettings _settings;
+  final _values = <String, dynamic>{};
   final _listeners = <VoidCallback>{};
 
   void addListener(VoidCallback listener) => _listeners.add(listener);
@@ -33,7 +43,7 @@ class Settings {
     }
   }
 
-  void dispose() => _settings.dispose();
+  void dispose() => _settings.close();
 
   bool? boolValue(String key) => getValue<bool>(key);
   int? intValue(String key) => getValue<int>(key);
@@ -42,9 +52,44 @@ class Settings {
   Iterable<String>? stringArrayValue(String key) =>
       getValue<Iterable>(key)?.cast<String>();
 
-  T? getValue<T>(String key) => _settings.value(key) as T?;
-  void setValue<T>(String key, Object value) => _settings.setValue(key, value);
-  void resetValue(String key) => _settings.resetValue(key);
+  T? getValue<T>(String key) => _values[key] ?? _updateValue(key);
+
+  T? _updateValue<T>(String key) {
+    try {
+      _settings.get(key).then((v) {
+        final value = v.toNative() as T?;
+        if (_values[key] != value) {
+          _values[key] = value;
+          notifyListeners();
+        }
+      });
+    } on GSettingsUnknownKeyException catch (_) {}
+  }
+
+  Future<void> setValue<T>(String key, T value) async {
+    if (_values[key] == key) {
+      return;
+    }
+    _values[key] = value;
+    switch (T) {
+      case bool:
+        return _settings.set(key, DBusBoolean(value as bool));
+      case int:
+        return _settings.set(key, DBusInt32(value as int));
+      case double:
+        return _settings.set(key, DBusDouble(value as double));
+      case String:
+        return _settings.set(key, DBusString(value as String));
+      default:
+        break;
+    }
+    if (value is List<String>) {
+      return _settings.set(key, DBusArray.string(value));
+    }
+    throw UnsupportedError('Unsupported type: $T');
+  }
 
-  void sync() => _settings.sync();
+  Future<void> resetValue(String key) {
+    return _settings.setAll(<String, DBusValue?>{key: null});
+  }
 }

lib/view/app_theme.dart

@@ -17,7 +17,6 @@ class AppTheme extends ValueNotifier<ThemeMode> {
         _settings.setValue('gtk-theme', 'Yaru');
         break;
     }
-    _settings.sync();
   }
 
   @override

pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
       path: package
   flutter:
     sdk: flutter
-  gsettings: ^0.1.2+1
+  gsettings: ^0.2.3
   linux_system_info: ^0.0.7
   mime: ^1.0.0
   bluez: ^0.7.4

test/widgets/app_theme_test.dart

@@ -15,7 +15,7 @@ void main() {
       AppTheme theme = AppTheme(settings);
 
       when(settings.setValue('gtk-theme', 'Yaru-dark')).thenAnswer(
-        (realInvocation) => true,
+        (realInvocation) async {},
       );
 
       theme.apply(Brightness.dark);
@@ -30,7 +30,7 @@ void main() {
       AppTheme theme = AppTheme(settings);
 
       when(settings.setValue('gtk-theme', 'Yaru')).thenAnswer(
-        (realInvocation) => true,
+        (realInvocation) async {},
       );
 
       theme.apply(Brightness.light);

test/widgets/app_theme_test.mocks.dart

@@ -2,6 +2,7 @@
 // in settings/test/widgets/app_theme_test.dart.
 // Do not manually edit this file.
 
+import 'dart:async' as _i4;
 import 'dart:ui' as _i3;
 
 import 'package:mockito/mockito.dart' as _i1;
@@ -59,16 +60,15 @@ class MockSettings extends _i1.Mock implements _i2.Settings {
   T? getValue<T>(String? key) =>
       (super.noSuchMethod(Invocation.method(#getValue, [key])) as T?);
   @override
-  void setValue<T>(String? key, Object? value) =>
-      super.noSuchMethod(Invocation.method(#setValue, [key, value]),
-          returnValueForMissingStub: null);
-  @override
-  void resetValue(String? key) =>
-      super.noSuchMethod(Invocation.method(#resetValue, [key]),
-          returnValueForMissingStub: null);
+  _i4.Future<void> setValue<T>(String? key, T? value) =>
+      (super.noSuchMethod(Invocation.method(#setValue, [key, value]),
+          returnValue: Future<void>.value(),
+          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
   @override
-  void sync() => super.noSuchMethod(Invocation.method(#sync, []),
-      returnValueForMissingStub: null);
+  _i4.Future<void> resetValue(String? key) =>
+      (super.noSuchMethod(Invocation.method(#resetValue, [key]),
+          returnValue: Future<void>.value(),
+          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
   @override
   String toString() => super.toString();
 }