Make sure Popups do not attempt to take focus when they are shown (#16365)

Co-authored-by: Max Katz <maxkatz6@outlook.com>

native/Avalonia.Native/src/OSX/AvnView.mm

@@ -297,7 +297,22 @@
                             )
             )
             )
-        [self becomeFirstResponder];
+    {
+        WindowBaseImpl* windowBase = dynamic_cast<WindowBaseImpl*>(_parent.getRaw());
+        
+        if(windowBase != nullptr){
+            WindowBaseImpl* parent = windowBase->Parent;
+            
+            if(parent != nullptr){
+                auto parentWindow = parent->Window;
+                
+                [parentWindow makeFirstResponder:parent->View];
+            }
+        } else{
+            [self becomeFirstResponder];
+        }
+    }
+       
 
     if(_parent != nullptr)
     {

src/Avalonia.Native/PopupImpl.cs

@@ -8,8 +8,6 @@ namespace Avalonia.Native
     class PopupImpl : WindowBaseImpl, IPopupImpl
     {
         private readonly ITopLevelImpl _parent;
-        private readonly IAvnPopup _native;
-        private readonly AvaloniaNativeTextInputMethod _inputMethod;
 
         public PopupImpl(IAvaloniaNativeFactory factory,
             ITopLevelImpl parent) : base(factory)
@@ -18,7 +16,7 @@ namespace Avalonia.Native
             
             using (var e = new PopupEvents(this))
             {
-                Init(new MacOSTopLevelHandle(_native = factory.CreatePopup(e)));
+                Init(new MacOSTopLevelHandle(factory.CreatePopup(e)));
             }
             
             PopupPositioner = new ManagedPopupPositioner(new ManagedPopupPositionerPopupImplHelper(parent, MoveResize));
@@ -28,13 +26,25 @@ namespace Avalonia.Native
                 parent = popupImpl._parent;
             }
 
+            if (parent is WindowBaseImpl windowBaseImpl)
+            {
+                Native!.SetParent(windowBaseImpl.Native);
+            }
+            
             //Use the parent's input context to process events
             if (parent is TopLevelImpl topLevelImpl)
             {
-                _inputMethod = topLevelImpl.InputMethod;
+                InputMethod = topLevelImpl.InputMethod;
             }
         }
 
+        public override void Dispose()
+        {
+            Native!.SetParent(null);
+            
+            base.Dispose();
+        }
+
         internal sealed override void Init(MacOSTopLevelHandle handle)
         {
             base.Init(handle);
@@ -71,16 +81,6 @@ namespace Avalonia.Native
             }
         }
 
-        public override void Show(bool activate, bool isDialog)
-        {
-            var parent = _parent;
-            while (parent is PopupImpl p) 
-                parent = p._parent;
-            if (parent is WindowImpl w)
-                w.Native.TakeFocusFromChildren();
-            base.Show(false, isDialog);
-        }
-
         public override IPopupImpl CreatePopup() => new PopupImpl(Factory, this);
 
         public void SetWindowManagerAddShadowHint(bool enabled)

src/Avalonia.Native/TopLevelImpl.cs

@@ -106,7 +106,7 @@ internal class TopLevelImpl : ITopLevelImpl, IFramebufferPlatformSurface
 
     public IAvnTopLevel? Native => _handle?.Native;
     public IPlatformHandle? Handle => _handle;
-    public AvaloniaNativeTextInputMethod? InputMethod { get; private set; }
+    public AvaloniaNativeTextInputMethod? InputMethod { get; protected set; }
     public Size ClientSize
     {
         get

src/Windows/Avalonia.Win32/PopupImpl.cs

@@ -22,25 +22,6 @@ namespace Avalonia.Win32
         {
             // Popups are always shown non-activated.
             UnmanagedMethods.ShowWindow(Handle.Handle, UnmanagedMethods.ShowWindowCommand.ShowNoActivate);
-
-            // We need to steal focus if it's held by a child window of our toplevel window
-            var parent = _parent;
-            while(parent != null)
-            {
-                if(parent is PopupImpl pi)
-                   parent = pi._parent;
-                else
-                    break;
-            }
-
-            if(parent == null)
-                return;
-
-            var focusOwner = UnmanagedMethods.GetFocus();
-            if (focusOwner != IntPtr.Zero &&
-                UnmanagedMethods.GetAncestor(focusOwner, UnmanagedMethods.GetAncestorFlags.GA_ROOT)
-                == parent.Handle?.Handle)
-                UnmanagedMethods.SetFocus(parent.Handle.Handle);
         }
 
         protected override bool ShouldTakeFocusOnClick => false;