Add plumbing for the SceneObjectDeleter to wait for the script engine to

allow final deletion of objects. Meant to support the attach(NULL_KEY) event,

OpenSim/Region/Framework/Interfaces/IEntityInventory.cs

@@ -197,5 +197,7 @@ namespace OpenSim.Region.Framework.Interfaces
         /// A <see cref="Dictionary`2"/>
         /// </returns>
         Dictionary<UUID, string> GetScriptStates();
+
+        bool CanBeDeleted();
     }
 }

OpenSim/Region/Framework/Interfaces/IScriptModule.cs

@@ -36,6 +36,7 @@ namespace OpenSim.Region.Framework.Interfaces
 
         string GetAssemblyName(UUID itemID);
         string GetXMLState(UUID itemID);
+        bool CanBeDeleted(UUID itemID);
 
         bool PostScriptEvent(UUID itemID, string name, Object[] args);
         bool PostObjectEvent(UUID itemID, string name, Object[] args);

OpenSim/Region/Framework/Scenes/AsyncSceneObjectGroupDeleter.cs

@@ -109,7 +109,7 @@ namespace OpenSim.Region.Framework.Scenes
             
             while (InventoryDeQueueAndDelete())
             {
-                m_log.Debug("[SCENE]: Sent item successfully to inventory, continuing...");
+                //m_log.Debug("[SCENE]: Sent item successfully to inventory, continuing...");
             }
         }            
 
@@ -128,11 +128,16 @@ namespace OpenSim.Region.Framework.Scenes
                     int left = m_inventoryDeletes.Count;
                     if (left > 0)
                     {
+                        x = m_inventoryDeletes.Dequeue();
+                        if (!x.objectGroup.CanBeDeleted())
+                        {
+                            m_inventoryDeletes.Enqueue(x);
+                            return true;
+                        }
+
                         m_log.DebugFormat(
                             "[SCENE]: Sending object to user's inventory, {0} item(s) remaining.", left);
                         
-                        x = m_inventoryDeletes.Dequeue();
-
                         try
                         {
                             m_scene.DeleteToInventory(x.action, x.folderID, x.objectGroup, x.remoteClient);                            

OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs

@@ -3383,5 +3383,16 @@ namespace OpenSim.Region.Framework.Scenes
             SetFromAssetID(uuid);
         }
         #endregion 
+
+        public bool CanBeDeleted()
+        {
+            foreach (SceneObjectPart part in Children.Values)
+            {
+                if (!part.CanBeDeleted())
+                    return false;
+            }
+
+            return true;
+        }
     }
 }

OpenSim/Region/Framework/Scenes/SceneObjectPart.cs

@@ -3787,5 +3787,10 @@ if (m_shape != null) {
 
             Inventory.ApplyNextOwnerPermissions();
         }        
+
+        public bool CanBeDeleted()
+        {
+            return Inventory.CanBeDeleted();
+        }
     }        
 }

OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs

@@ -910,5 +910,30 @@ namespace OpenSim.Region.Framework.Scenes
             }
             return ret;
         }
+
+        public bool CanBeDeleted()
+        {
+            if (!ContainsScripts())
+                return true;
+
+            IScriptModule[] engines = m_part.ParentGroup.Scene.RequestModuleInterfaces<IScriptModule>();
+
+            if (engines == null) // No engine at all
+                return true;
+
+            foreach (TaskInventoryItem item in m_items.Values)
+            {
+                if (item.InvType == (int)InventoryType.LSL)
+                {
+                    foreach (IScriptModule e in engines)
+                    {
+                        if(!e.CanBeDeleted(item.ItemID))
+                            return false;
+                    }
+                }
+            }
+
+            return true;
+        }
     }
 }

OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs

@@ -476,5 +476,10 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
         {
             return "";
         }
+
+        public bool CanBeDeleted(UUID itemID)
+        {
+            return true;
+        }
     }
 }

OpenSim/Region/ScriptEngine/Interfaces/IScriptInstance.cs

@@ -95,6 +95,7 @@ namespace OpenSim.Region.ScriptEngine.Interfaces
         UUID GetDetectID(int idx);
         void SaveState(string assembly);
         void DestroyScriptInstance();
+        bool CanBeDeleted();
 
         IScriptApi GetApi(string name);
 

OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs

@@ -991,5 +991,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
         {
             get { return m_RegionID; }
         }
+
+        public bool CanBeDeleted()
+        {
+            return true;
+        }
     }
 }

OpenSim/Region/ScriptEngine/XEngine/XEngine.cs

@@ -1241,5 +1241,14 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                 return "";
             return instance.GetXMLState();
         }
+
+        public bool CanBeDeleted(UUID itemID)
+        {
+            IScriptInstance instance = GetInstance(itemID);
+            if (instance == null)
+                return true;
+
+            return instance.CanBeDeleted();
+        }
     }
 }