BindableAttribute.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel;
 
[AttributeUsage(AttributeTargets.All)]
public sealed class BindableAttribute : Attribute
{
    public static readonly BindableAttribute Yes = new BindableAttribute(bindable: true);
 
    public static readonly BindableAttribute No = new BindableAttribute(bindable: false);
 
    public static readonly BindableAttribute Default = No;
 
    private readonly bool _isDefault;
 
    public bool Bindable { get; }
 
    public BindingDirection Direction { get; }
 
    public BindableAttribute(bool bindable)
        : this(bindable, BindingDirection.OneWay)
    {
    }
 
    public BindableAttribute(bool bindable, BindingDirection direction)
    {
        Bindable = bindable;
        Direction = direction;
    }
 
    public BindableAttribute(BindableSupport flags)
        : this(flags, BindingDirection.OneWay)
    {
    }
 
    public BindableAttribute(BindableSupport flags, BindingDirection direction)
    {
        Bindable = flags != BindableSupport.No;
        _isDefault = flags == BindableSupport.Default;
        Direction = direction;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj == this)
        {
            return true;
        }
        if (obj is BindableAttribute bindableAttribute)
        {
            return bindableAttribute.Bindable == Bindable;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return Bindable.GetHashCode();
    }
 
    public override bool IsDefaultAttribute()
    {
        if (!Equals(Default))
        {
            return _isDefault;
        }
        return true;
    }
}