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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);
}
}
}
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