// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.Windows.Forms;
 
public partial class Control
{
    /// <summary>
    ///  Contains a single ambient property, including DISPID, name and value.
    /// </summary>
    private class AmbientProperty
    {
        private object? _value;
 
        /// <summary>
        ///  Creates a new, empty ambient property.
        /// </summary>
        internal AmbientProperty(string name, int dispID)
        {
            Name = name;
            DispID = dispID;
            _value = null;
            Empty = true;
        }
 
        /// <summary>
        ///  The windows forms property name.
        /// </summary>
        internal string Name { get; }
 
        /// <summary>
        ///  The DispID for the property.
        /// </summary>
        internal int DispID { get; }
 
        /// <summary>
        ///  Returns true if this property has not been set.
        /// </summary>
        internal bool Empty { get; private set; }
 
        /// <summary>
        ///  The current value of the property.
        /// </summary>
        internal object? Value
        {
            get => _value;
            set
            {
                _value = value;
                Empty = false;
            }
        }
 
        /// <summary>
        ///  Resets the property.
        /// </summary>
        internal void ResetValue()
        {
            Empty = true;
            _value = null;
        }
    }
}