perf(WindowManager): Add MeasureViewNativeFast binding

Author: ebariche

src/Uno.UI/UI/Xaml/WindowManagerInterop.wasm.cs

@@ -13,6 +13,10 @@
 using Windows.UI;
 using Windows.UI.Xaml;
 
+#if NET7_0_OR_GREATER
+using System.Runtime.InteropServices.JavaScript;
+#endif
+
 namespace Uno.UI.Xaml
 {
 	/// <summary>
@@ -268,6 +272,15 @@ internal static Size MeasureView(IntPtr htmlId, Size availableSize, bool measure
 			}
 			else
 			{
+#if NET7_0_OR_GREATER
+				using var pReturn = TSInteropMarshaller.AllocateBlittableStructure(typeof(WindowManagerMeasureViewReturn));
+				
+				NativeMethods.MeasureView(htmlId, availableSize.Width, availableSize.Height, measureContent, pReturn);
+
+				var result = TSInteropMarshaller.UnmarshalStructure<WindowManagerMeasureViewReturn>(pReturn);
+
+				return new Size(result.DesiredWidth, result.DesiredHeight);
+#else
 				var parms = new WindowManagerMeasureViewParams
 				{
 					HtmlId = htmlId,
@@ -279,6 +292,7 @@ internal static Size MeasureView(IntPtr htmlId, Size availableSize, bool measure
 				var ret = (WindowManagerMeasureViewReturn)TSInteropMarshaller.InvokeJS("Uno:measureViewNative", parms, typeof(WindowManagerMeasureViewReturn));
 
 				return new Size(ret.DesiredWidth, ret.DesiredHeight);
+#endif
 			}
 		}
 
@@ -1462,5 +1476,13 @@ internal enum HtmlPointerButtonUpdate
 			Eraser = 5
 		}
 		#endregion
+
+#if NET7_0_OR_GREATER
+		internal static partial class NativeMethods
+		{
+			[JSImport("globalThis.Uno.UI.WindowManager.current.measureViewNativeFast")]
+			internal static partial void MeasureView(IntPtr htmlId, double availableWidth, double availableHeight, bool measureContent, IntPtr pReturn);
+		}
+#endif
 	}
 }

src/Uno.UI/ts/WindowManager.ts

@@ -1328,6 +1328,17 @@ namespace Uno.UI {
 			return true;
 		}
 
+		public measureViewNativeFast(htmlId: number, availableWidth: number, availableHeight: number, measureContent: boolean, pReturn: number) {
+
+			const result = this.measureViewInternal(htmlId, availableWidth, availableHeight, measureContent);
+
+			const desiredSize = new WindowManagerMeasureViewReturn();
+			desiredSize.DesiredWidth = result[0];
+			desiredSize.DesiredHeight = result[1];
+
+			desiredSize.marshal(pReturn);
+		}
+
 		private static MAX_WIDTH = `${Number.MAX_SAFE_INTEGER}vw`;
 		private static MAX_HEIGHT = `${Number.MAX_SAFE_INTEGER}vh`;