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using System;
using System.Collections.Generic;
namespace Xamarin.PropertyEditing
{
/// <remarks>
/// <para>The <see cref="Source"/> and <see cref="ValueDescriptor"/> for the value must match for two ValueInfos to be considered equal.</para>
/// </remarks>
public class ValueInfo<T> : IEquatable<ValueInfo<T>>
{
public T Value
{
get;
set;
}
/// <summary>
/// Gets or sets a descriptor of the value source, such as a resource reference or binding description.
/// </summary>
public object ValueDescriptor
{
get;
set;
}
public ValueSource Source
{
get;
set;
}
public string CustomExpression
{
get;
set;
}
public bool Equals (ValueInfo<T> other)
{
if (ReferenceEquals (null, other))
return false;
if (ReferenceEquals (this, other))
return true;
return EqualityComparer<T>.Default.Equals (Value, other.Value) && Equals (ValueDescriptor, other.ValueDescriptor) && Source == other.Source && CustomExpression == other.CustomExpression;
}
public override bool Equals (object obj)
{
if (ReferenceEquals (null, obj))
return false;
if (ReferenceEquals (this, obj))
return true;
if (obj.GetType () != GetType ())
return false;
return Equals ((ValueInfo<T>) obj);
}
public override int GetHashCode ()
{
unchecked {
var hashCode = EqualityComparer<T>.Default.GetHashCode (Value);
hashCode = (hashCode * 397) ^ (ValueDescriptor?.GetHashCode () ?? 0);
hashCode = (hashCode * 397) ^ (int) Source;
hashCode = (hashCode * 397) ^ (CustomExpression?.GetHashCode() ?? 0);
return hashCode;
}
}
public static bool operator == (ValueInfo<T> left, ValueInfo<T> right)
{
return Equals (left, right);
}
public static bool operator != (ValueInfo<T> left, ValueInfo<T> right)
{
return !Equals (left, right);
}
}
}
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