Refactor PopupBuddyLayer

src/AtomUI.Controls/Popup/Popup.cs

@@ -18,6 +18,7 @@ using Avalonia.Layout;
 using Avalonia.LogicalTree;
 using Avalonia.Media;
 using Avalonia.Threading;
+using Avalonia.VisualTree;
 
 namespace AtomUI.Controls;
 
@@ -155,7 +156,7 @@ public class Popup : AvaloniaPopup,
     {
         this.BindWaveSpiritProperties();
         Closed                         += HandleClosed;
-        Opened                         += HandleOpened; 
+        Opened                         += HandleOpened;
     }
     
     // Popup 好像不加入视觉树，所以我们放在逻辑树
@@ -280,6 +281,10 @@ public class Popup : AvaloniaPopup,
     
     private void CreateBuddyLayer()
     {
+        if (_buddyLayer != null)
+        {
+            _buddyLayer.Detach();
+        }
         var topLevel = TopLevel.GetTopLevel(PlacementTarget ?? Parent as Visual);
         Debug.Assert(topLevel is not null);
         _buddyLayer = new PopupBuddyLayer(this, topLevel);
@@ -511,12 +516,9 @@ public class Popup : AvaloniaPopup,
         {
             return;
         }
-
         if (!IsMotionEnabled)
         {
             Open();
-            Debug.Assert(_buddyLayer != null);
-            _buddyLayer.Attach();
             opened?.Invoke();
             (Host as PopupRoot)?.PlatformImpl?.SetTopmost(true);
             return;
@@ -611,6 +613,14 @@ public class Popup : AvaloniaPopup,
         {
             _isNeedWaitFlipSync = true;
         }
+        else if (change.Property == PlacementTargetProperty)
+        {
+            var newTarget = change.GetNewValue<Control?>();
+            if (newTarget != null)
+            {
+                CreateBuddyLayer();
+            }
+        }
     }
 }
 

src/AtomUI.Controls/Popup/PopupBuddyLayer.cs

@@ -162,7 +162,8 @@ internal class PopupBuddyLayer : SceneLayer, IPopupBuddyLayer, IShadowAwareLayer
 
     public void Attach()
     {
-        _buddyDecorator.CaptureContentControl();
+        SetupPopupHost();
+        _buddyDecorator.ConfigureBlankContentControl();
         if (OperatingSystem.IsMacOS())
         {
             PlatformImpl?.SetTopmost(true);
@@ -182,8 +183,6 @@ internal class PopupBuddyLayer : SceneLayer, IPopupBuddyLayer, IShadowAwareLayer
         {
             Show();
         }
-       
-        SetupPopupHost();
     }
 
     public void Detach()