handle mouse back button event

lib/components/components.dart

@@ -21,7 +21,6 @@ import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/image_provider/cached_image.dart';
 import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/res.dart';
-import 'package:venera/foundation/state_controller.dart';
 import 'package:venera/network/cloudflare.dart';
 import 'package:venera/pages/comic_page.dart';
 import 'package:venera/pages/favorites/favorites_page.dart';
@@ -46,3 +45,4 @@ part 'select.dart';
 part 'side_bar.dart';
 part 'comic.dart';
 part 'effects.dart';
+part 'gesture.dart';

lib/components/gesture.dart

@@ -0,0 +1,61 @@
+part of 'components.dart';
+
+class MouseBackRecognizer extends BaseTapGestureRecognizer {
+  GestureTapDownCallback? onTapDown;
+
+  MouseBackRecognizer({
+    super.debugOwner,
+    super.supportedDevices,
+    super.allowedButtonsFilter,
+  });
+
+  @override
+  void handleTapCancel({
+    required PointerDownEvent down,
+    PointerCancelEvent? cancel,
+    required String reason,
+  }) {}
+
+  @override
+  void handleTapDown({required PointerDownEvent down}) {
+    final TapDownDetails details = TapDownDetails(
+      globalPosition: down.position,
+      localPosition: down.localPosition,
+      kind: getKindForPointer(down.pointer),
+    );
+
+    if (down.buttons == kBackMouseButton && onTapDown != null) {
+      invokeCallback<void>('onTapDown', () => onTapDown!(details));
+    }
+  }
+
+  @override
+  void handleTapUp({
+    required PointerDownEvent down,
+    required PointerUpEvent up,
+  }) {}
+}
+
+class MouseBackDetector extends StatelessWidget {
+  const MouseBackDetector({super.key, required this.onTapDown, required this.child});
+
+  final Widget child;
+
+  final GestureTapDownCallback onTapDown;
+
+  @override
+  Widget build(BuildContext context) {
+    return RawGestureDetector(
+      gestures: <Type, GestureRecognizerFactory>{
+        MouseBackRecognizer: GestureRecognizerFactoryWithHandlers<MouseBackRecognizer>(
+          () => MouseBackRecognizer(),
+          (MouseBackRecognizer instance) {
+            instance.onTapDown = onTapDown;
+          },
+        ),
+      },
+      behavior: HitTestBehavior.translucent,
+      child: child,
+    );
+  }
+}

lib/main.dart

@@ -20,7 +20,7 @@ void main(List<String> args) {
   runZonedGuarded(() async {
     WidgetsFlutterBinding.ensureInitialized();
     await init();
-    if(App.isAndroid) {
+    if (App.isAndroid) {
       handleLinks();
     }
     FlutterError.onError = (details) {
@@ -73,6 +73,7 @@ class _MyAppState extends State<MyApp> {
       el.markNeedsBuild();
       el.visitChildren(rebuild);
     }
+
     (context as Element).visitChildren(rebuild);
     setState(() {});
   }
@@ -114,10 +115,10 @@ class _MyAppState extends State<MyApp> {
       ],
       locale: () {
         var lang = appdata.settings['language'];
-        if(lang == 'system') {
+        if (lang == 'system') {
           return null;
         }
-        return switch(lang) {
+        return switch (lang) {
           'zh-CN' => const Locale('zh', 'CN'),
           'zh-TW' => const Locale('zh', 'TW'),
           'en-US' => const Locale('en'),
@@ -148,7 +149,12 @@ class _MyAppState extends State<MyApp> {
                   App.pop,
                 ),
               },
-              child: WindowFrame(widget),
+              child: MouseBackDetector(
+                onTapDown: (event) {
+                  App.pop();
+                },
+                child: WindowFrame(widget),
+              ),
             );
           }
           return _SystemUiProvider(Material(