1 files changed, 39 insertions, 0 deletions
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/ReferenceExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/ReferenceExtension.cs
new file mode 100644
index 00000000..6dc8280d
--- /dev/null
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/ReferenceExtension.cs
@@ -0,0 +1,39 @@
+using System;
+using Xamarin.Forms.Internals;
+using Xamarin.Forms.Xaml.Internals;
+
+namespace Xamarin.Forms.Xaml
+{
+	[ContentProperty("Name")]
+	public class ReferenceExtension : IMarkupExtension
+	{
+		public string Name { get; set; }
+
+		public object ProvideValue(IServiceProvider serviceProvider)
+		{
+			if (serviceProvider == null)
+				throw new ArgumentNullException("serviceProvider");
+			var valueProvider = serviceProvider.GetService(typeof (IProvideValueTarget)) as IProvideParentValues;
+			if (valueProvider == null)
+				throw new ArgumentException("serviceProvider does not provide an IProvideValueTarget");
+			var namescopeprovider = serviceProvider.GetService(typeof (INameScopeProvider)) as INameScopeProvider;
+			if (namescopeprovider != null && namescopeprovider.NameScope != null)
+			{
+				var value = namescopeprovider.NameScope.FindByName(Name);
+				if (value != null)
+					return value;
+			}
+
+			foreach (var target in valueProvider.ParentObjects)
+			{
+				var ns = target as INameScope;
+				if (ns == null)
+					continue;
+				var value = ns.FindByName(Name);
+				if (value != null)
+					return value;
+			}
+			throw new Exception("Can't resolve name on Element");
+		}
+	}
+}
+\ No newline at end of file