1 files changed, 72 insertions, 4 deletions

diff --git a/OpenSim/Region/Framework/Scenes/UndoState.cs b/OpenSim/Region/Framework/Scenes/UndoState.cs
index d34d8e5..81f41db 100644
--- a/OpenSim/Region/Framework/Scenes/UndoState.cs
+++ b/OpenSim/Region/Framework/Scenes/UndoState.cs
@@ -30,9 +30,24 @@ using System.Reflection;
 using log4net;
 using OpenMetaverse;
 using OpenSim.Region.Framework.Interfaces;
+using System;
 
 namespace OpenSim.Region.Framework.Scenes
 {
+    [Flags]
+    public enum UndoType
+    {
+        STATE_PRIM_POSITION = 1,
+        STATE_PRIM_ROTATION = 2,
+        STATE_PRIM_SCALE = 4,
+        STATE_PRIM_ALL = 7,
+        STATE_GROUP_POSITION = 8,
+        STATE_GROUP_ROTATION = 16,
+        STATE_GROUP_SCALE = 32,
+        STATE_GROUP_ALL = 56,
+        STATE_ALL = 63       
+    }
+
     public class UndoState
     {
 //        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
@@ -40,6 +55,11 @@ namespace OpenSim.Region.Framework.Scenes
         public Vector3 Position = Vector3.Zero;
         public Vector3 Scale = Vector3.Zero;
         public Quaternion Rotation = Quaternion.Identity;
+        public Vector3 GroupPosition = Vector3.Zero;
+        public Quaternion GroupRotation = Quaternion.Identity;
+        public Vector3 GroupScale = Vector3.Zero;
+        public DateTime LastUpdated = DateTime.Now;
+        public UndoType Type;
 
         /// <summary>
         /// Is this undo state for an entire group?
@@ -58,7 +78,13 @@ namespace OpenSim.Region.Framework.Scenes
                 ForGroup = forGroup;
 
 //                    if (ForGroup)
-                    Position = part.ParentGroup.AbsolutePosition;
+                    GroupScale = part.ParentGroup.RootPart.Shape.Scale;
+
+                    //FUBAR WARNING: Do NOT get the group's absoluteposition here 
+                    //or you'll experience a loop and/or a stack issue
+                    GroupPosition = part.ParentGroup.RootPart.AbsolutePosition;
+                    GroupRotation = part.ParentGroup.GroupRotation;
+                    Position = part.ParentGroup.RootPart.AbsolutePosition;
 //                    else
 //                        Position = part.OffsetPosition;
 
@@ -90,7 +116,49 @@ namespace OpenSim.Region.Framework.Scenes
 //                        "[UNDO STATE]: Storing undo scale {0} for child part", Scale);
             }
         }
-
+        public void Merge(UndoState last)
+        {
+            if ((Type & UndoType.STATE_GROUP_POSITION) == 0 || ((last.Type & UndoType.STATE_GROUP_POSITION) >= (Type & UndoType.STATE_GROUP_POSITION)))
+            {
+                GroupPosition = last.GroupPosition;
+                Position = last.Position;
+            }
+            if ((Type & UndoType.STATE_GROUP_SCALE) == 0 || ((last.Type & UndoType.STATE_GROUP_SCALE) >= (Type & UndoType.STATE_GROUP_SCALE)))
+            {
+                GroupScale = last.GroupScale;
+                Scale = last.Scale;
+            }
+            if ((Type & UndoType.STATE_GROUP_ROTATION) == 0 || ((last.Type & UndoType.STATE_GROUP_ROTATION) >= (Type & UndoType.STATE_GROUP_ROTATION)))
+            {
+                GroupRotation = last.GroupRotation;
+                Rotation = last.Rotation;
+            }
+            if ((Type & UndoType.STATE_PRIM_POSITION) == 0 || ((last.Type & UndoType.STATE_PRIM_POSITION) >= (Type & UndoType.STATE_PRIM_POSITION)))
+            {
+                Position = last.Position;
+            }
+            if ((Type & UndoType.STATE_PRIM_SCALE) == 0 || ((last.Type & UndoType.STATE_PRIM_SCALE) >= (Type & UndoType.STATE_PRIM_SCALE)))
+            {
+                Scale = last.Scale;
+            }
+            if ((Type & UndoType.STATE_PRIM_ROTATION) == 0 || ((last.Type & UndoType.STATE_PRIM_ROTATION) >= (Type & UndoType.STATE_PRIM_ROTATION)))
+            {
+                Rotation = last.Rotation;
+            }
+            Type = Type | last.Type;
+        }
+        public bool Compare(UndoState undo)
+        {
+            if (undo == null || Position == null) return false;
+            if (undo.Position == Position && undo.Rotation == Rotation && undo.Scale == Scale && undo.GroupPosition == GroupPosition && undo.GroupScale == GroupScale && undo.GroupRotation == GroupRotation)
+            {
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
         /// <summary>
         /// Compare the relevant state in the given part to this state.
         /// </summary>
@@ -115,7 +183,7 @@ namespace OpenSim.Region.Framework.Scenes
             return false;
         }
 
-        public void PlaybackState(SceneObjectPart part)
+        private void RestoreState(SceneObjectPart part)
         {
             part.Undoing = true;
 
@@ -249,4 +317,4 @@ namespace OpenSim.Region.Framework.Scenes
             m_terrainModule.UndoTerrain(m_terrainChannel);
         }
     }
-}
\ No newline at end of file
+}