Class UndoActionObject

Source/Editor/History/UndoActionObject.cs:16–226

Undo action object.

    /// </summary>
    /// <seealso cref="IUndoAction" />
    [Serializable]
    public class UndoActionObject : UndoActionBase<UndoActionObject.DataStorage>
    {
        /// <summary>
        /// The data value storage to solve issue for flax objects and editor scene tree nodes which are serialized by ref id.
        /// </summary>
        [Serializable]
        public struct DataValue
        {
            /// <summary>
            /// The generic value (anything).
            /// </summary>
            public object Generic;

            /// <summary>
            /// The flax object.
            /// </summary>
            public FlaxEngine.Object FlaxObject;

            /// <summary>
            /// The editor node object.
            /// </summary>
            public SceneGraph.SceneGraphNode EditorNode;

            /// <summary>
            /// The id.
            /// </summary>
            public Guid? Id;

            /// <summary>
            /// Gets the proper value.
            /// </summary>
            [NoSerialize]
            public object Value => EditorNode ?? FlaxObject ?? Generic ?? Id;

            /// <summary>
            /// Initializes a new instance of the <see cref="DataValue"/> struct.
            /// </summary>
            /// <param name="value">The value.</param>
            public DataValue(object value)
            {
                Generic = null;
                FlaxObject = null;
                EditorNode = null;
                Id = null;

                if (value is SceneGraph.SceneGraphNode editorNode)
                {
                    EditorNode = editorNode;
                }
                else if (value is FlaxEngine.Object flaxObject)
                {
                    FlaxObject = flaxObject;
                }
                else if (value is Guid guid)
                {
                    Id = guid;
                }