ExtendedPropertyDescriptor.cs

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using System.Collections.Generic;
 
namespace System.ComponentModel;
 
internal sealed class ExtendedPropertyDescriptor : PropertyDescriptor
{
    private readonly ReflectPropertyDescriptor _extenderInfo;
 
    private readonly IExtenderProvider _provider;
 
    public override Type ComponentType => _extenderInfo.ComponentType;
 
    public override bool IsReadOnly => Attributes[typeof(ReadOnlyAttribute)].Equals(ReadOnlyAttribute.Yes);
 
    public override Type PropertyType => _extenderInfo.ExtenderGetType(_provider);
 
    public override string DisplayName
    {
        get
        {
            string text = base.DisplayName;
            if (!(Attributes[typeof(DisplayNameAttribute)] is DisplayNameAttribute displayNameAttribute) || displayNameAttribute.IsDefaultAttribute())
            {
                string text2 = MemberDescriptor.GetSite(_provider)?.Name;
                if (text2 != null && text2.Length > 0)
                {
                    text = System.SR.Format(System.SR.MetaExtenderName, text, text2);
                }
            }
            return text;
        }
    }
 
    public ExtendedPropertyDescriptor(ReflectPropertyDescriptor extenderInfo, Type receiverType, IExtenderProvider provider, Attribute[] attributes)
        : base(extenderInfo, attributes)
    {
        List<Attribute> list = new List<Attribute>(AttributeArray) { ExtenderProvidedPropertyAttribute.Create(extenderInfo, receiverType, provider) };
        if (extenderInfo.IsReadOnly)
        {
            list.Add(ReadOnlyAttribute.Yes);
        }
        Attribute[] array = new Attribute[list.Count];
        list.CopyTo(array, 0);
        AttributeArray = array;
        _extenderInfo = extenderInfo;
        _provider = provider;
    }
 
    public ExtendedPropertyDescriptor(PropertyDescriptor extender, Attribute[] attributes)
        : base(extender, attributes)
    {
        ExtenderProvidedPropertyAttribute extenderProvidedPropertyAttribute = extender.Attributes[typeof(ExtenderProvidedPropertyAttribute)] as ExtenderProvidedPropertyAttribute;
        ReflectPropertyDescriptor extenderInfo = extenderProvidedPropertyAttribute.ExtenderProperty as ReflectPropertyDescriptor;
        _extenderInfo = extenderInfo;
        _provider = extenderProvidedPropertyAttribute.Provider;
    }
 
    public override bool CanResetValue(object comp)
    {
        return _extenderInfo.ExtenderCanResetValue(_provider, comp);
    }
 
    public override object GetValue(object comp)
    {
        return _extenderInfo.ExtenderGetValue(_provider, comp);
    }
 
    public override void ResetValue(object comp)
    {
        _extenderInfo.ExtenderResetValue(_provider, comp, this);
    }
 
    public override void SetValue(object component, object value)
    {
        _extenderInfo.ExtenderSetValue(_provider, component, value, this);
    }
 
    public override bool ShouldSerializeValue(object comp)
    {
        return _extenderInfo.ExtenderShouldSerializeValue(_provider, comp);
    }
}