Fix CarouselView layout constraint issues on Mac Catalyst (#30714)

* Initial plan

* Fix CarouselView layout constraint issues on Mac Catalyst

Co-authored-by: mattleibow <[email protected]>

* Add missing image

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: mattleibow <[email protected]>
Co-authored-by: Rui Marinho <[email protected]>

Author: 3 people

src/Controls/src/Core/Handlers/Items/CarouselViewHandler.iOS.cs

@@ -71,7 +71,22 @@ public static void MapLoop(CarouselViewHandler handler, CarouselView carouselVie
 			(handler.Controller as CarouselViewController)?.UpdateLoop();
 		}
 
-		public override Size GetDesiredSize(double widthConstraint, double heightConstraint) =>
-			this.GetDesiredSizeFromHandler(widthConstraint, heightConstraint);
+		public override Size GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			var size = this.GetDesiredSizeFromHandler(widthConstraint, heightConstraint);
+
+			// Clamp size to constraints to prevent exceeding them on Mac Catalyst
+			if (!double.IsInfinity(widthConstraint) && size.Width > widthConstraint)
+			{
+				size.Width = widthConstraint;
+			}
+
+			if (!double.IsInfinity(heightConstraint) && size.Height > heightConstraint)
+			{
+				size.Height = heightConstraint;
+			}
+
+			return size;
+		}
 	}
 }

src/Controls/tests/TestCases.Mac.Tests/snapshots/mac/AddItemsToCarouselViewWorks.png

@@ -1,4 +1,4 @@
-#if TEST_FAILS_ON_WINDOWS && TEST_FAILS_ON_CATALYST //This test is failing, likely due to product issue, for more information: https://github.com/dotnet/maui/issues/27059
+#if TEST_FAILS_ON_WINDOWS //This test is failing, likely due to product issue, for more information: https://github.com/dotnet/maui/issues/27059
 using NUnit.Framework;
 using UITest.Appium;
 using UITest.Core;