// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using SuppressMessageAttribute = System.Diagnostics.CodeAnalysis.SuppressMessageAttribute;

namespace System.Xml.Linq
{
    /// <summary>
    /// Provides data for the <see cref="XObject.Changing"/> and <see cref="XObject.Changed"/> events.
    /// </summary>
    public class XObjectChangeEventArgs : EventArgs
    {
        private readonly XObjectChange _objectChange;

        /// <summary>
        /// Event argument for a <see cref="XObjectChange.Add"/> change event.
        /// </summary>
        public static readonly XObjectChangeEventArgs Add = new XObjectChangeEventArgs(XObjectChange.Add);

        /// <summary>
        /// Event argument for a <see cref="XObjectChange.Remove"/> change event.
        /// </summary>
        public static readonly XObjectChangeEventArgs Remove = new XObjectChangeEventArgs(XObjectChange.Remove);

        /// <summary>
        /// Event argument for a <see cref="XObjectChange.Name"/> change event.
        /// </summary>
        public static readonly XObjectChangeEventArgs Name = new XObjectChangeEventArgs(XObjectChange.Name);

        /// <summary>
        /// Event argument for a <see cref="XObjectChange.Value"/> change event.
        /// </summary>
        public static readonly XObjectChangeEventArgs Value = new XObjectChangeEventArgs(XObjectChange.Value);

        /// <summary>
        /// Initializes a new instance of the <see cref="XObjectChangeEventArgs"/> class.
        /// </summary>
        public XObjectChangeEventArgs(XObjectChange objectChange)
        {
            _objectChange = objectChange;
        }

        /// <summary>
        /// Gets the type (<see cref="XObjectChange"/>) of change.
        /// </summary>
        public XObjectChange ObjectChange
        {
            get { return _objectChange; }
        }
    }
}