1 files changed, 48 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/FontSizeConverter.cs b/Xamarin.Forms.Core/FontSizeConverter.cs
new file mode 100644
index 00000000..0d0a8865
--- /dev/null
+++ b/Xamarin.Forms.Core/FontSizeConverter.cs
@@ -0,0 +1,48 @@
+using System;
+using System.Globalization;
+using Xamarin.Forms.Xaml;
+
+namespace Xamarin.Forms
+{
+	public class FontSizeConverter : TypeConverter, IExtendedTypeConverter
+	{
+		[Obsolete("use ConvertFromInvariantString (string, IServiceProvider)")]
+		object IExtendedTypeConverter.ConvertFrom(CultureInfo culture, object value, IServiceProvider serviceProvider)
+		{
+			return ((IExtendedTypeConverter)this).ConvertFromInvariantString(value as string, serviceProvider);
+		}
+
+		object IExtendedTypeConverter.ConvertFromInvariantString(string value, IServiceProvider serviceProvider)
+		{
+			if (value != null)
+			{
+				double size;
+				if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out size))
+					return size;
+				NamedSize namedSize;
+				if (Enum.TryParse(value, out namedSize))
+				{
+					Type type;
+					var valueTargetProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
+					type = valueTargetProvider != null ? valueTargetProvider.TargetObject.GetType() : typeof(Label);
+					return Device.GetNamedSize(namedSize, type, false);
+				}
+			}
+			throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
+		}
+
+		public override object ConvertFromInvariantString(string value)
+		{
+			if (value != null)
+			{
+				double size;
+				if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out size))
+					return size;
+				NamedSize namedSize;
+				if (Enum.TryParse(value, out namedSize))
+					return Device.GetNamedSize(namedSize, typeof(Label), false);
+			}
+			throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double)));
+		}
+	}
+}
+\ No newline at end of file