Fix popup shadow layer bug on macos

src/AtomUI.Base/MotionScene/SceneLayer.cs

@@ -11,7 +11,7 @@ namespace AtomUI.MotionScene;
 
 internal class SceneLayer : WindowBase, IHostedVisualTreeRoot, IDisposable
 {
-    private readonly IManagedPopupPositionerPopup? _managedPopupPositionerPopup;
+    protected readonly IManagedPopupPositionerPopup? ManagedPopupPositionerPopup;
     private readonly Canvas _layout;
     private SceneMotionActorControl? _motionActorControl;
 
@@ -49,7 +49,7 @@ internal class SceneLayer : WindowBase, IHostedVisualTreeRoot, IDisposable
         this.SetWindowIgnoreMouseEvents(true);
         if (PlatformImpl?.PopupPositioner is ManagedPopupPositioner managedPopupPositioner)
         {
-            _managedPopupPositionerPopup = managedPopupPositioner.GetManagedPopupPositionerPopup();
+            ManagedPopupPositionerPopup = managedPopupPositioner.GetManagedPopupPositionerPopup();
         }
 
         _layout   = new Canvas();
@@ -155,7 +155,7 @@ internal class SceneLayer : WindowBase, IHostedVisualTreeRoot, IDisposable
     {
         Width  = size.Width;
         Height = size.Height;
-        _managedPopupPositionerPopup?.MoveAndResize(new Point(Math.Round(point.X), Math.Floor(point.Y + 0.5)), size);
+        ManagedPopupPositionerPopup?.MoveAndResize(new Point(Math.Round(point.X), Math.Floor(point.Y + 0.5)), size);
     }
 
     protected override void OnOpened(EventArgs e)

src/AtomUI.Controls/Popup/PopupBuddyLayer.cs

@@ -113,10 +113,32 @@ internal class PopupBuddyLayer : SceneLayer, IPopupBuddyLayer, IShadowAwareLayer
         {
             scaling = windowBase.DesktopScaling;
         }
-        var offset = new Point(popupOffset.X, popupOffset.Y);
+        var offset         = new Point(popupOffset.X, popupOffset.Y);
+        
         var maskShadowsThickness = MaskShadows.Thickness();
         var layerOffset = new Point(offset.X - maskShadowsThickness.Left * scaling,
             offset.Y - maskShadowsThickness.Top * scaling);
+        if (OperatingSystem.IsMacOS())
+        {
+            var topOffsetMark = 0d;
+            if (ManagedPopupPositionerPopup != null)
+            {
+                var screens        = ManagedPopupPositionerPopup.Screens;
+                foreach (var screen in screens)
+                {
+                    topOffsetMark = Math.Max(topOffsetMark, screen.WorkingArea.Top);
+                }
+            }
+            var delta = layerOffset.Y - topOffsetMark;
+            if (delta < 0)
+            {
+                RenderTransform = new TranslateTransform(0, delta);
+            }
+            else
+            {
+                RenderTransform = null;
+            }
+        }
         MoveAndResize(layerOffset, popupRoot.ClientSize.Inflate(MaskShadows.Thickness()));
     }
 

src/AtomUI.Controls/TextBlock/TextBlock.cs

@@ -34,13 +34,7 @@ public class TextBlock : AvaloniaTextBlock, IResourceBindingManager
         base.OnDetachedFromVisualTree(e);
         this.DisposeTokenBindings();
     }
-
-    protected override Size MeasureOverride(Size availableSize)
-    {
-        var size = base.MeasureOverride(availableSize);
-        return new Size(size.Width, size.Height + Math.Abs(_deltaOffsetY));
-    }
-
+    
     protected override void RenderTextLayout(DrawingContext context, Point origin)
     {
         base.RenderTextLayout(context, new Point(origin.X, origin.Y + _deltaOffsetY));