5 files changed, 45 insertions, 13 deletions

diff --git a/OpenSim/Framework/Communications/Cache/InventoryFolder.cs b/OpenSim/Framework/Communications/Cache/InventoryFolder.cs
index 3495e55..6161c5a 100644
--- a/OpenSim/Framework/Communications/Cache/InventoryFolder.cs
+++ b/OpenSim/Framework/Communications/Cache/InventoryFolder.cs
@@ -36,6 +36,13 @@ namespace OpenSim.Framework.Communications.Cache
         public Dictionary<LLUUID, InventoryItemBase> Items = new Dictionary<LLUUID, InventoryItemBase>();
         public Dictionary<LLUUID, InventoryFolderImpl> SubFolders = new Dictionary<LLUUID, InventoryFolderImpl>();
 
+        // Accessors
+        public int SubFoldersCount
+        {
+            get { return SubFolders.Count; }
+        }
+
+        // Constructors
         public InventoryFolderImpl(InventoryFolderBase folderbase)
         {
             agentID = folderbase.agentID;
@@ -132,4 +139,4 @@ namespace OpenSim.Framework.Communications.Cache
             return itemList;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/Communications/Cache/UserProfileCache.cs b/OpenSim/Framework/Communications/Cache/UserProfileCache.cs
index 117ed36..379ac9d 100644
--- a/OpenSim/Framework/Communications/Cache/UserProfileCache.cs
+++ b/OpenSim/Framework/Communications/Cache/UserProfileCache.cs
@@ -111,6 +111,15 @@ namespace OpenSim.Framework.Communications.Cache
             }
         }
 
+        /// <summary>
+        /// Tell the client about the various child items and folders contained in the requested folder.
+        /// </summary>
+        /// <param name="remoteClient"></param>
+        /// <param name="folderID"></param>
+        /// <param name="ownerID"></param>
+        /// <param name="fetchFolders"></param>
+        /// <param name="fetchItems"></param>
+        /// <param name="sortOrder"></param>
         public void HandleFecthInventoryDescendents(IClientAPI remoteClient, LLUUID folderID, LLUUID ownerID,
                                                     bool fetchFolders, bool fetchItems, int sortOrder)
         {
@@ -118,14 +127,14 @@ namespace OpenSim.Framework.Communications.Cache
             if (folderID == libraryRoot.folderID)
             {
                 remoteClient.SendInventoryFolderDetails(libraryRoot.agentID, libraryRoot.folderID,
-                                                        libraryRoot.RequestListOfItems());
+                                                        libraryRoot.RequestListOfItems(), libraryRoot.SubFoldersCount);
 
                 return;
             }
 
             if ((fold = libraryRoot.HasSubFolder(folderID)) != null)
             {
-                remoteClient.SendInventoryFolderDetails(libraryRoot.agentID, folderID, fold.RequestListOfItems());
+                remoteClient.SendInventoryFolderDetails(libraryRoot.agentID, folderID, fold.RequestListOfItems(), fold.SubFoldersCount);
 
                 return;
             }
@@ -140,16 +149,16 @@ namespace OpenSim.Framework.Communications.Cache
                         if (fetchItems)
                         {
                             remoteClient.SendInventoryFolderDetails(remoteClient.AgentId, folderID,
-                                                                    userProfile.RootFolder.RequestListOfItems());
+                                                                    userProfile.RootFolder.RequestListOfItems(), userProfile.RootFolder.SubFoldersCount);
                         }
                     }
                     else
                     {
                         InventoryFolderImpl folder = userProfile.RootFolder.HasSubFolder(folderID);
-                        if ((folder != null) && fetchItems)
+                        
+                        if (fetchItems && folder != null)
                         {
-                            remoteClient.SendInventoryFolderDetails(remoteClient.AgentId, folderID,
-                                                                    folder.RequestListOfItems());
+                            remoteClient.SendInventoryFolderDetails(remoteClient.AgentId, folderID, folder.RequestListOfItems(), folder.SubFoldersCount);
                         }
                     }
                 }
@@ -184,4 +193,4 @@ namespace OpenSim.Framework.Communications.Cache
             m_parent.InventoryService.RequestInventoryForUser(userID, userInfo.FolderReceive, userInfo.ItemReceive);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index 0068761..1427516 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -449,7 +449,7 @@ namespace OpenSim.Framework
         void SendPrimTerseUpdate(ulong regionHandle, ushort timeDilation, uint localID, LLVector3 position,
                                  LLQuaternion rotation,LLVector3 velocity, LLVector3 rotationalvelocity);
 
-        void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items);
+        void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items, int subFoldersCount);
         void SendInventoryItemDetails(LLUUID ownerID, InventoryItemBase item);
         void SendInventoryItemUpdate(InventoryItemBase Item);
         void SendRemoveInventoryItem(LLUUID itemID);
diff --git a/OpenSim/Region/ClientStack/ClientView.cs b/OpenSim/Region/ClientStack/ClientView.cs
index 90002c3..86efac1 100644
--- a/OpenSim/Region/ClientStack/ClientView.cs
+++ b/OpenSim/Region/ClientStack/ClientView.cs
@@ -1031,7 +1031,16 @@ namespace OpenSim.Region.ClientStack
             OutPacket(kill, ThrottleOutPacketType.Task);
         }
 
-        public void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items)
+        /// <summary>
+        /// Send information about the items contained in a folder to the client.
+        /// </summary>
+        /// <param name="ownerID">The owner of the folder</param>
+        /// <param name="folderID">The id of the folder</param>
+        /// <param name="items">The items contained in the folder identified by folderID</param>
+        /// <param name="subFoldersCount">The number of subfolders contained in the given folder.  This is necessary since
+        ///   the client is expecting inventory packets which incorporate this number into the descendents field, even though
+        ///   we send back no details of the folders themselves (only the items).</param>
+        public void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items, int subFoldersCount)
         {
             Encoding enc = Encoding.ASCII;
             uint FULL_MASK_PERMISSIONS = 2147483647;
@@ -1041,13 +1050,20 @@ namespace OpenSim.Region.ClientStack
             if (items.Count < 40)
             {
                 descend.ItemData = new InventoryDescendentsPacket.ItemDataBlock[items.Count];
-                descend.AgentData.Descendents = items.Count;
+                // In the very first packet, also include the sub folders count so that the total descendents the 
+                // client receives matches its expectations.  Subsequent inventory packets need contain only the count
+                // of the number of items actually in them.
+                descend.AgentData.Descendents = items.Count + subFoldersCount;
             }
             else
             {
                 descend.ItemData = new InventoryDescendentsPacket.ItemDataBlock[40];
-                descend.AgentData.Descendents = 40;
+                // In the very first packet, also include the sub folders count so that the total descendents the 
+                // client receives matches its expectations.  Subsequent inventory packets need contain only the count
+                // of the number of items actually in them.
+                descend.AgentData.Descendents = 40 + subFoldersCount;
             }
+
             int i = 0;
             foreach (InventoryItemBase item in items)
             {
diff --git a/OpenSim/Region/Examples/SimpleApp/MyNpcCharacter.cs b/OpenSim/Region/Examples/SimpleApp/MyNpcCharacter.cs
index 56316e6..77a287a 100644
--- a/OpenSim/Region/Examples/SimpleApp/MyNpcCharacter.cs
+++ b/OpenSim/Region/Examples/SimpleApp/MyNpcCharacter.cs
@@ -301,7 +301,7 @@ namespace SimpleApp
         {
         }
 
-        public virtual void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items)
+        public virtual void SendInventoryFolderDetails(LLUUID ownerID, LLUUID folderID, List<InventoryItemBase> items, int subFoldersCount)
         {
         }