refactor: Add secondary window support in Launcher class

- Introduced `IsSecondaryWindow` property and `OnRequestClose` event in the `Launcher` view model.
- Updated the constructor to accept a boolean for secondary window status.
- Modified `Quit` method to handle close requests for secondary windows.
- Refactored `MoveToNewWindow` and `CopyToNewWindow` methods to streamline window creation.
- Added `RegisterOnRequestClose` method in the `Launcher` view to manage close requests.
- Updated `using` directives in `Launcher.axaml.cs` to include `Avalonia.Threading`.

Author: massimopaganigh

src/ViewModels/Launcher.cs

@@ -50,7 +50,15 @@ public IDisposable Switcher
             private set => SetProperty(ref _switcher, value);
         }
 
-        public Launcher(string startupRepo)
+        public bool IsSecondaryWindow
+        {
+            get => _isSecondaryWindow;
+            set => SetProperty(ref _isSecondaryWindow, value);
+        }
+
+        public event Action OnRequestClose;
+
+        public Launcher(string startupRepo, bool isSecondaryWindow = false)
         {
             _ignoreIndexChange = true;
 
@@ -116,6 +124,8 @@ public Launcher(string startupRepo)
 
             if (string.IsNullOrEmpty(_title))
                 UpdateTitle();
+
+            IsSecondaryWindow = isSecondaryWindow;
         }
 
         public void Quit()
@@ -273,7 +283,10 @@ public void CloseTab(LauncherPage page)
                 }
                 else
                 {
-                    App.Quit(0);
+                    if (IsSecondaryWindow)
+                        OnRequestClose?.Invoke();
+                    else
+                        App.Quit(0);
                 }
 
                 return;
@@ -554,15 +567,16 @@ public ContextMenu CreateContextForPageTab(LauncherPage page)
 
         public void MoveToNewWindow(LauncherPage page)
         {
+            NewWindow(page);
             CloseTab(page);
-
-            var newWindow = new Views.Launcher() { DataContext = new Launcher(page.Node.Id) };
-            newWindow.Show();
         }
 
-        public void CopyToNewWindow(LauncherPage page)
+        public void CopyToNewWindow(LauncherPage page) => NewWindow(page);
+
+        private void NewWindow(LauncherPage page)
         {
-            var newWindow = new Views.Launcher() { DataContext = new Launcher(page.Node.Id) };
+            var newWindow = new Views.Launcher() { DataContext = new Launcher(page.Node.Id, true) };
+            newWindow.RegisterOnRequestClose();
             newWindow.Show();
         }
 
@@ -643,5 +657,6 @@ private void UpdateTitle()
         private bool _ignoreIndexChange = false;
         private string _title = string.Empty;
         private IDisposable _switcher = null;
+        private bool _isSecondaryWindow = false;
     }
 }

src/Views/Launcher.axaml.cs

@@ -5,6 +5,7 @@
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Platform;
+using Avalonia.Threading;
 using Avalonia.VisualTree;
 
 namespace SourceGit.Views
@@ -85,6 +86,12 @@ public Launcher()
             WindowStartupLocation = WindowStartupLocation.CenterScreen;
         }
 
+        public void RegisterOnRequestClose()
+        {
+            if (DataContext is ViewModels.Launcher vm)
+                vm.OnRequestClose += () => Dispatcher.UIThread.Post(Close);
+        }
+
         public void BringToTop()
         {
             if (WindowState == WindowState.Minimized)