fix TextPresenter text alignment with restricted height #4866

src/Avalonia.Controls/Presenters/TextPresenter.cs

@@ -4,6 +4,7 @@ using Avalonia.Media;
 using Avalonia.Metadata;
 using Avalonia.Threading;
 using Avalonia.VisualTree;
+using Avalonia.Layout;
 
 namespace Avalonia.Controls.Presenters
 {
@@ -312,7 +313,24 @@ namespace Avalonia.Controls.Presenters
                 context.FillRectangle(background, new Rect(Bounds.Size));
             }
 
-            context.DrawText(Foreground, new Point(), FormattedText);
+            double top = 0;
+            var textSize = FormattedText.Bounds.Size;
+
+            if (Bounds.Height < textSize.Height)
+            {
+                switch (VerticalAlignment)
+                {
+                    case VerticalAlignment.Center:
+                        top += (Bounds.Height - textSize.Height) / 2;
+                        break;
+
+                    case VerticalAlignment.Bottom:
+                        top += (Bounds.Height - textSize.Height);
+                        break;
+                }
+            }
+
+            context.DrawText(Foreground, new Point(0, top), FormattedText);
         }
 
         public override void Render(DrawingContext context)