feat: DataTransferManager support on macOS

src/Uno.UWP/ApplicationModel/DataTransfer/DataTransferManager.cs

@@ -1,6 +1,6 @@
 #nullable enable
 
-#if __WASM__ || __IOS__ || __ANDROID__
+#if __WASM__ || __IOS__ || __ANDROID__ || __SKIA__ || __MACOS__
 using System;
 using Windows.Foundation;
 using Uno.Logging;

src/Uno.UWP/ApplicationModel/DataTransfer/DataTransferManager.macOS.cs

@@ -0,0 +1,63 @@
+#nullable enable
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using AppKit;
+using CoreGraphics;
+using Foundation;
+using Windows.Foundation;
+
+namespace Windows.ApplicationModel.DataTransfer
+{
+	public partial class DataTransferManager
+	{
+		public static bool IsSupported() => true;
+
+		private static async Task<bool> ShowShareUIAsync(ShareUIOptions options, DataPackage dataPackage)
+		{
+			var window = NSApplication.SharedApplication.MainWindow;
+
+			if (window == null)
+			{
+				throw new InvalidOperationException("Sharing is not possible when no window is active.");
+			}
+
+			var view = window.ContentView;
+
+			var dataPackageView = dataPackage.GetView();
+
+			var sharedData = new List<NSObject>();
+
+			var title = dataPackage.Properties.Title ?? string.Empty;
+
+			if (dataPackageView.Contains(StandardDataFormats.Text))
+			{
+				var text = await dataPackageView.GetTextAsync();
+				sharedData.Add(new NSString(text));
+			}
+
+			var uri = await GetSharedUriAsync(dataPackageView);
+			if (uri != null)
+			{
+				sharedData.Add(NSUrl.FromString(uri.ToString()));
+			}
+
+			CGRect rect = options.SelectionRect ?? Rect.Empty;
+			rect.Y = view.Bounds.Height - rect.Bottom;
+
+			var picker = new NSSharingServicePicker(sharedData.ToArray());
+
+			var completionSource = new TaskCompletionSource<bool>();
+
+			picker.DidChooseSharingService += (s, e) =>
+			{
+				completionSource.SetResult(e.Service != null);
+			};
+
+			picker.ShowRelativeToRect(rect, view, NSRectEdge.MinYEdge);
+
+			return await completionSource.Task;
+		}
+	}
+}

src/Uno.UWP/ApplicationModel/DataTransfer/DataTransferManager.other.cs

@@ -1,4 +1,4 @@
-#if !__WASM__ && !__IOS__ && !__ANDROID__
+#if !__WASM__ && !__IOS__ && !__ANDROID__ && !__SKIA__ && !__MACOS__
 
 namespace Windows.ApplicationModel.DataTransfer
 {

src/Uno.UWP/Generated/3.0.0.0/Windows.ApplicationModel.DataTransfer/DataTransferManager.cs

@@ -13,7 +13,7 @@ public  partial class DataTransferManager
 		// Forced skipping of method Windows.ApplicationModel.DataTransfer.DataTransferManager.TargetApplicationChosen.remove
 		// Forced skipping of method Windows.ApplicationModel.DataTransfer.DataTransferManager.ShareProvidersRequested.add
 		// Forced skipping of method Windows.ApplicationModel.DataTransfer.DataTransferManager.ShareProvidersRequested.remove
-		#if false || false || NET461 || false || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+		#if false || false || NET461 || false || false || __NETSTD_REFERENCE__ || false
 		[global::Uno.NotImplemented("NET461", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public static void ShowShareUI( global::Windows.ApplicationModel.DataTransfer.ShareUIOptions options)
 		{
@@ -27,7 +27,7 @@ public static bool IsSupported()
 			throw new global::System.NotImplementedException("The member bool DataTransferManager.IsSupported() is not implemented in Uno.");
 		}
 		#endif
-		#if false || false || NET461 || false || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+		#if false || false || NET461 || false || false || __NETSTD_REFERENCE__ || false
 		[global::Uno.NotImplemented("NET461", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public static void ShowShareUI()
 		{