1 files changed, 74 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/GridLength.cs b/Xamarin.Forms.Core/GridLength.cs
new file mode 100644
index 00000000..5d569d08
--- /dev/null
+++ b/Xamarin.Forms.Core/GridLength.cs
@@ -0,0 +1,74 @@
+using System;
+using System.Diagnostics;
+
+namespace Xamarin.Forms
+{
+	[TypeConverter(typeof(GridLengthTypeConverter))]
+	[DebuggerDisplay("{Value}.{GridUnitType}")]
+	public struct GridLength
+	{
+		public static GridLength Auto
+		{
+			get { return new GridLength(1, GridUnitType.Auto); }
+		}
+
+		public double Value { get; }
+
+		public GridUnitType GridUnitType { get; }
+
+		public bool IsAbsolute
+		{
+			get { return GridUnitType == GridUnitType.Absolute; }
+		}
+
+		public bool IsAuto
+		{
+			get { return GridUnitType == GridUnitType.Auto; }
+		}
+
+		public bool IsStar
+		{
+			get { return GridUnitType == GridUnitType.Star; }
+		}
+
+		public GridLength(double value) : this(value, GridUnitType.Absolute)
+		{
+		}
+
+		public GridLength(double value, GridUnitType type)
+		{
+			if (value < 0 || double.IsNaN(value))
+				throw new ArgumentException("value is less than 0 or is not a number", "value");
+			if ((int)type < (int)GridUnitType.Absolute || (int)type > (int)GridUnitType.Auto)
+				throw new ArgumentException("type is not a valid GridUnitType", "type");
+
+			Value = value;
+			GridUnitType = type;
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj != null && obj is GridLength && Equals((GridLength)obj);
+		}
+
+		bool Equals(GridLength other)
+		{
+			return GridUnitType == other.GridUnitType && Math.Abs(Value - other.Value) < double.Epsilon;
+		}
+
+		public override int GetHashCode()
+		{
+			return GridUnitType.GetHashCode() * 397 ^ Value.GetHashCode();
+		}
+
+		public static implicit operator GridLength(double absoluteValue)
+		{
+			return new GridLength(absoluteValue);
+		}
+
+		public override string ToString()
+		{
+			return string.Format("{0}.{1}", Value, GridUnitType);
+		}
+	}
+}
+\ No newline at end of file