feat(skia): Enable StorageFile.GetFileFromApplicationUri

src/Uno.UWP/Storage/StorageFile.cs

@@ -24,11 +24,11 @@ public static IAsyncOperation<StorageFile> GetFileFromPathAsync(string path)
 		internal static StorageFile GetFileFromPath(string path)
 			=> new StorageFile(new Local(path));
 
-		[NotImplemented("NET461", "__SKIA__", "__NETSTD_REFERENCE__")]
+		[NotImplemented("NET461", "__NETSTD_REFERENCE__")]
 		public static IAsyncOperation<StorageFile> GetFileFromApplicationUriAsync(Uri uri)
 			=> AsyncOperation.FromTask(ct => GetFileFromApplicationUri(ct, uri));
 
-#if NET461 || __SKIA__ || __NETSTD_REFERENCE__
+#if NET461 || __NETSTD_REFERENCE__
 		private static Task<StorageFile> GetFileFromApplicationUri(CancellationToken ct, Uri uri)
 			=> throw new NotImplementedException();
 #endif

src/Uno.UWP/Storage/StorageFile.skia.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Windows.Storage
+{
+	partial class StorageFile
+	{
+		private static async Task<StorageFile> GetFileFromApplicationUri(CancellationToken ct, Uri uri)
+		{
+			if (uri.Scheme != "ms-appx")
+			{
+				throw new InvalidOperationException("Uri is not using the ms-appx scheme");
+			}
+
+			var path = uri.PathAndQuery.TrimStart(new char[] { '/' });
+
+			var baseDir = global::System.IO.Path.GetDirectoryName(global::System.Reflection.Assembly.GetExecutingAssembly().Location);
+			var resourcePathname = global::System.IO.Path.Combine(baseDir, path);
+
+			if (resourcePathname != null)
+			{
+				return await StorageFile.GetFileFromPathAsync(resourcePathname);
+			}
+			else
+			{
+				throw new FileNotFoundException($"The file [{path}] cannot be found  in the package directory");
+			}
+		}
+	}
+}