1 files changed, 44 insertions, 0 deletions
diff --git a/Xamarin.Forms.Xaml/MarkupExtensions/StaticResourceExtension.cs b/Xamarin.Forms.Xaml/MarkupExtensions/StaticResourceExtension.cs
new file mode 100644
index 00000000..e5a7aef7
--- /dev/null
+++ b/Xamarin.Forms.Xaml/MarkupExtensions/StaticResourceExtension.cs
@@ -0,0 +1,44 @@
+using System;
+
+namespace Xamarin.Forms.Xaml
+{
+	[ContentProperty("Key")]
+	public sealed class StaticResourceExtension : IMarkupExtension
+	{
+		public string Key { get; set; }
+
+		public object ProvideValue(IServiceProvider serviceProvider)
+		{
+			if (serviceProvider == null)
+				throw new ArgumentNullException("serviceProvider");
+			if (Key == null)
+			{
+				var lineInfoProvider = serviceProvider.GetService(typeof (IXmlLineInfoProvider)) as IXmlLineInfoProvider;
+				var lineInfo = (lineInfoProvider != null) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
+				throw new XamlParseException("you must specify a key in {StaticResource}", lineInfo);
+			}
+			var valueProvider = serviceProvider.GetService(typeof (IProvideValueTarget)) as IProvideParentValues;
+			if (valueProvider == null)
+				throw new ArgumentException();
+			var xmlLineInfoProvider = serviceProvider.GetService(typeof (IXmlLineInfoProvider)) as IXmlLineInfoProvider;
+			var xmlLineInfo = xmlLineInfoProvider != null ? xmlLineInfoProvider.XmlLineInfo : null;
+
+			foreach (var p in valueProvider.ParentObjects)
+			{
+				var ve = p as VisualElement;
+				if (ve == null)
+					continue;
+				if (ve.Resources == null)
+					continue;
+				object res;
+				if (ve.Resources.TryGetValue(Key, out res))
+					return res;
+			}
+			if (Application.Current != null && Application.Current.Resources != null &&
+			    Application.Current.Resources.ContainsKey(Key))
+				return Application.Current.Resources[Key];
+
+			throw new XamlParseException(string.Format("StaticResource not found for key {0}", Key), xmlLineInfo);
+		}
+	}
+}
+\ No newline at end of file