removed duplicated code

Author: vgromfeld

Microsoft.Toolkit.Uwp.UI.Controls/WrapPanel/WrapPanel.Data.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Runtime.InteropServices.WindowsRuntime;
 using Windows.Foundation;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
@@ -87,34 +88,28 @@ public UvRect WithVerticalAlignment(VerticalAlignment alignment, double maxHeigh
 
             public UvRect WithHorizontalAlignment(HorizontalAlignment alignment, double maxHeight)
             {
+                // Since (U,V) coordinates are flipped, we can use the exact same logic as for the vertical alignment
+                // We just convert the HorizontalAlignment values to VerticalAlignment values (more or less a no-op
+                // since the integer values are the same).
+                VerticalAlignment verticalAlignment;
                 switch (alignment)
                 {
                     case HorizontalAlignment.Center:
-                        return new UvRect
-                        {
-                            Position = Position.Add(
-                                u: 0,
-                                v: Math.Max((maxHeight - Size.V) / 2.0, 0.0)),
-                            Size = Size,
-                        };
+                        verticalAlignment = VerticalAlignment.Center;
+                        break;
                     case HorizontalAlignment.Right:
-                        return new UvRect
-                        {
-                            Position = Position.Add(
-                                u: 0,
-                                v: Math.Max(maxHeight - Size.V, 0.0)),
-                            Size = Size,
-                        };
+                        verticalAlignment = VerticalAlignment.Bottom;
+                        break;
                     case HorizontalAlignment.Stretch:
-                        return new UvRect
-                        {
-                            Position = Position,
-                            Size = new UvMeasure { U = Size.U, V = maxHeight },
-                        };
+                        verticalAlignment = VerticalAlignment.Stretch;
+                        break;
                     case HorizontalAlignment.Left:
                     default:
-                        return this;
+                        verticalAlignment = VerticalAlignment.Top;
+                        break;
                 }
+
+                return WithVerticalAlignment(verticalAlignment, maxHeight);
             }
 
             public Rect ToRect(Orientation orientation)