fix(macOS): Traffic lights sometimes become horizontal

Use NotificationCenter as a workaround of rewrite BitsdojoWindow

lib/utils/get_dir_path.dart

@@ -1,15 +1,6 @@
-import 'dart:io';
-
 import 'package:file_selector/file_selector.dart';
 
-import 'macos_window_control_button_manager.dart';
-
-// TODO(hexagram): This is a temporary solution, not the best way to handle this callback.
-// Once BitsdojoWindow is forked and rewritten, using NSWindowDelagate to listen for windowDidEndSheet and windowWillBeginSheet will be a more general and better solution to handle this.
 Future<String?> getDirPath() async {
   final path = await getDirectoryPath();
-  if (Platform.isMacOS) {
-    MacOSWindowControlButtonManager.setVertical();
-  }
   return path;
 }

lib/widgets/title_bar/window_frame_for_macos.dart

@@ -1,11 +1,10 @@
 import 'dart:io';
 
-import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import 'package:fluent_ui/fluent_ui.dart';
-import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 
 import '../../utils/macos_window_control_button_manager.dart';
+import '../../providers/full_screen.dart';
 import '../../providers/router_path.dart';
 import '../../providers/responsive_providers.dart';
 
@@ -22,25 +21,30 @@ class WindowFrameForMacOS extends StatefulWidget {
   State<WindowFrameForMacOS> createState() => _WindowFrameForMacOSState();
 }
 
-class _WindowFrameForMacOSState extends State<WindowFrameForMacOS>
-    with FullScreenListener {
+class _WindowFrameForMacOSState extends State<WindowFrameForMacOS> {
+  late FullScreenProvider _fullscreen;
+  late ResponsiveProvider _responsiveProvider;
+
   @override
-  void initState() {
-    super.initState();
-    FullScreen.addListener(this);
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    _fullscreen = Provider.of<FullScreenProvider>(context, listen: false);
+    _responsiveProvider = Provider.of<ResponsiveProvider>(context, listen: false);
+
+    _fullscreen.addListener(updateWindowControlButtons);
+    _responsiveProvider.addListener(updateWindowControlButtons);
+    $router.addListener(updateWindowControlButtons);
   }
 
   @override
   dispose() {
     super.dispose();
-    FullScreen.removeListener(this);
+    _fullscreen.removeListener(updateWindowControlButtons);
+    _responsiveProvider.removeListener(updateWindowControlButtons);
+    $router.removeListener(updateWindowControlButtons);
   }
 
-  @override
-  void onFullScreenChanged(bool enabled, SystemUiMode? systemUiMode) {
-    if (!enabled) {
-      MacOSWindowControlButtonManager.setVertical();
-    }
+  void updateWindowControlButtons() {
     setState(() => {});
   }
 

macos/Runner/MainFlutterWindow.swift

@@ -30,8 +30,50 @@ class MainFlutterWindow: BitsdojoWindow {
 
     WindowButtonPositioner.shared.mainFlutterWindow = self
 
+    NotificationCenter.default.addObserver(
+      self,
+      selector: #selector(windowDidEnterFullScreen),
+      name: NSWindow.didEnterFullScreenNotification,
+      object: self)
+
+    NotificationCenter.default.addObserver(
+      self,
+      selector: #selector(windowDidExitFullScreen),
+      name: NSWindow.didExitFullScreenNotification,
+      object: self)
+
+    NotificationCenter.default.addObserver(
+      self,
+      selector: #selector(windowWillBeginSheet),
+      name: NSWindow.willBeginSheetNotification,
+      object: self)
+
+    NotificationCenter.default.addObserver(
+      self,
+      selector: #selector(windowDidEndSheet),
+      name: NSWindow.didEndSheetNotification,
+      object: self)
+
     super.awakeFromNib()
   }
+
+  @objc private func windowDidEnterFullScreen(_ notification: Notification) {}
+
+  @objc private func windowDidExitFullScreen(_ notification: Notification) {
+    WindowButtonPositioner.shared.setVertical()
+  }
+
+  @objc private func windowWillBeginSheet(_ notification: Notification) {
+    WindowButtonPositioner.shared.setVertical()
+  }
+
+  @objc private func windowDidEndSheet(_ notification: Notification) {
+    WindowButtonPositioner.shared.setVertical()
+  }
+
+  deinit {
+    NotificationCenter.default.removeObserver(self)
+  }
 }
 
 class WindowButtonPositioner {