1 files changed, 250 insertions, 0 deletions

diff --git a/OpenSim/Region/Framework/Scenes/UndoState.cs b/OpenSim/Region/Framework/Scenes/UndoState.cs
new file mode 100644
index 0000000..860172c
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+++ b/OpenSim/Region/Framework/Scenes/UndoState.cs
@@ -0,0 +1,250 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Reflection;
+using log4net;
+using OpenMetaverse;
+using OpenSim.Region.Framework.Interfaces;
+
+namespace OpenSim.Region.Framework.Scenes
+{
+    public class UndoState
+    {
+//        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public Vector3 Position = Vector3.Zero;
+        public Vector3 Scale = Vector3.Zero;
+        public Quaternion Rotation = Quaternion.Identity;
+
+        /// <summary>
+        /// Is this undo state for an entire group?
+        /// </summary>
+        public bool ForGroup;
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="part"></param>
+        /// <param name="forGroup">True if the undo is for an entire group</param>
+        public UndoState(SceneObjectPart part, bool forGroup)
+        {
+            if (part.ParentID == 0)
+            {
+                ForGroup = forGroup;
+
+//                    if (ForGroup)
+                    Position = part.ParentGroup.AbsolutePosition;
+//                    else
+//                        Position = part.OffsetPosition;
+
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo position {0} for root part", Position);
+
+                Rotation = part.RotationOffset;
+
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo rotation {0} for root part", Rotation);
+
+                Scale = part.Shape.Scale;
+
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo scale {0} for root part", Scale);
+            }
+            else
+            {
+                Position = part.OffsetPosition;
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo position {0} for child part", Position);
+
+                Rotation = part.RotationOffset;
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo rotation {0} for child part", Rotation);
+
+                Scale = part.Shape.Scale;
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Storing undo scale {0} for child part", Scale);
+            }
+        }
+
+        /// <summary>
+        /// Compare the relevant state in the given part to this state.
+        /// </summary>
+        /// <param name="part"></param>
+        /// <returns>true if both the part's position, rotation and scale match those in this undo state.  False otherwise.</returns>
+        public bool Compare(SceneObjectPart part)
+        {
+            if (part != null)
+            {
+                if (part.ParentID == 0)
+                    return
+                        Position == part.ParentGroup.AbsolutePosition
+                            && Rotation == part.RotationOffset
+                            && Scale == part.Shape.Scale;
+                else
+                    return
+                        Position == part.OffsetPosition
+                            && Rotation == part.RotationOffset
+                            && Scale == part.Shape.Scale;
+            }
+
+            return false;
+        }
+
+        public void PlaybackState(SceneObjectPart part)
+        {
+            part.Undoing = true;
+
+            if (part.ParentID == 0)
+            {
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Undoing position to {0} for root part {1} {2}",
+//                        Position, part.Name, part.LocalId);
+
+                if (Position != Vector3.Zero)
+                {
+                    if (ForGroup)
+                        part.ParentGroup.AbsolutePosition = Position;
+                    else
+                        part.ParentGroup.UpdateRootPosition(Position);
+                }
+
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Undoing rotation {0} to {1} for root part {2} {3}",
+//                        part.RotationOffset, Rotation, part.Name, part.LocalId);
+
+                if (ForGroup)
+                    part.UpdateRotation(Rotation);
+                else
+                    part.ParentGroup.UpdateRootRotation(Rotation);
+
+                if (Scale != Vector3.Zero)
+                {
+//                        m_log.DebugFormat(
+//                            "[UNDO STATE]: Undoing scale {0} to {1} for root part {2} {3}",
+//                            part.Shape.Scale, Scale, part.Name, part.LocalId);
+
+                    if (ForGroup)
+                        part.ParentGroup.GroupResize(Scale);
+                    else
+                        part.Resize(Scale);
+                }
+
+                part.ParentGroup.ScheduleGroupForTerseUpdate();
+            }
+            else
+            {
+                // Note: Updating these properties on sop automatically schedules an update if needed
+                if (Position != Vector3.Zero)
+                {
+//                        m_log.DebugFormat(
+//                            "[UNDO STATE]: Undoing position {0} to {1} for child part {2} {3}",
+//                            part.OffsetPosition, Position, part.Name, part.LocalId);
+
+                    part.OffsetPosition = Position;
+                }
+
+//                    m_log.DebugFormat(
+//                        "[UNDO STATE]: Undoing rotation {0} to {1} for child part {2} {3}",
+//                        part.RotationOffset, Rotation, part.Name, part.LocalId);
+
+                part.UpdateRotation(Rotation);
+
+                if (Scale != Vector3.Zero)
+                {
+//                        m_log.DebugFormat(
+//                            "[UNDO STATE]: Undoing scale {0} to {1} for child part {2} {3}",
+//                            part.Shape.Scale, Scale, part.Name, part.LocalId);
+
+                    part.Resize(Scale);
+                }
+            }
+
+            part.Undoing = false;
+        }
+
+        public void PlayfwdState(SceneObjectPart part)
+        {
+            part.Undoing = true;
+
+            if (part.ParentID == 0)
+            {
+                if (Position != Vector3.Zero)
+                    part.ParentGroup.AbsolutePosition = Position;
+
+                if (Rotation != Quaternion.Identity)
+                    part.UpdateRotation(Rotation);
+
+                if (Scale != Vector3.Zero)
+                {
+                    if (ForGroup)
+                        part.ParentGroup.GroupResize(Scale);
+                    else
+                        part.Resize(Scale);
+                }
+
+                part.ParentGroup.ScheduleGroupForTerseUpdate();
+            }
+            else
+            {
+                // Note: Updating these properties on sop automatically schedules an update if needed
+                if (Position != Vector3.Zero)
+                    part.OffsetPosition = Position;
+
+                if (Rotation != Quaternion.Identity)
+                    part.UpdateRotation(Rotation);
+
+                if (Scale != Vector3.Zero)
+                    part.Resize(Scale);
+            }
+
+            part.Undoing = false;
+        }
+    }
+
+    public class LandUndoState
+    {
+        public ITerrainModule m_terrainModule;
+        public ITerrainChannel m_terrainChannel;
+
+        public LandUndoState(ITerrainModule terrainModule, ITerrainChannel terrainChannel)
+        {
+            m_terrainModule = terrainModule;
+            m_terrainChannel = terrainChannel;
+        }
+
+        public bool Compare(ITerrainChannel terrainChannel)
+        {
+            return m_terrainChannel == terrainChannel;
+        }
+
+        public void PlaybackState()
+        {
+            m_terrainModule.UndoTerrain(m_terrainChannel);
+        }
+    }
+}
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