Add OnPasted to Visject Surface nodes for custom post-paste logic

Source/Editor/Surface/SurfaceNode.cs

@@ -395,6 +395,14 @@ namespace FlaxEditor.Surface
         /// </summary>
         public virtual SurfaceNode[] SealedNodes => null;
 
+        /// <summary>
+        /// Called after adding the control to the surface after paste.
+        /// </summary>
+        /// <param name="idsMapping">The nodes IDs mapping (original node ID to pasted node ID). Can be sued to update internal node's data after paste operation from the original data.</param>
+        public virtual void OnPasted(System.Collections.Generic.Dictionary<uint, uint> idsMapping)
+        {
+        }
+
         /// <summary>
         /// Gets a value indicating whether this node uses dependent boxes.
         /// </summary>

Source/Editor/Surface/VisjectSurface.CopyPaste.cs

@@ -419,6 +419,10 @@ namespace FlaxEditor.Surface
                 {
                     node.Value.OnSpawned(SurfaceNodeActions.Paste);
                 }
+                foreach (var node in nodes)
+                {
+                    node.Value.OnPasted(idsMapping);
+                }
 
                 // Add undo action
                 if (Undo != null && nodes.Count > 0)