7 files changed, 97 insertions, 71 deletions

diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
index 1c28f49..2dea14d 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
@@ -221,9 +221,9 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                     // If we're an NPC then skip all the item checks and manipulations since we don't have an
                     // inventory right now.
                     if (sp.PresenceType == PresenceType.Npc)
-                        RezSingleAttachmentFromInventoryInternal(sp, UUID.Zero, attach.AssetID, p);
+                        RezSingleAttachmentFromInventoryInternal(sp, UUID.Zero, attach.AssetID, p, true);
                     else
-                        RezSingleAttachmentFromInventory(sp, attach.ItemID, p);
+                        RezSingleAttachmentFromInventory(sp, attach.ItemID, p | (uint)0x80);
                 }
                 catch (Exception e)
                 {
@@ -283,13 +283,13 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 
             sp.ClearAttachments();
         }
-
-        public bool AttachObject(IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool silent, bool temp)
+        
+        public bool AttachObject(IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool silent, bool temp, bool append)
         {
             if (!Enabled)
                 return false;
 
-            return AttachObjectInternal(sp, group, attachmentPt, silent, temp, false);
+            return AttachObjectInternal(sp, group, attachmentPt, silent, temp, append);
         }
 
         /// <summary>
@@ -305,19 +305,6 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
         private bool AttachObjectInternal(
             IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool silent, bool temp, bool resumeScripts)
         {
-            if (sp.GetAttachments().Contains(group))
-            {
-//                m_log.WarnFormat(
-//                    "[ATTACHMENTS MODULE]: Ignoring request to attach {0} {1} to {2} on {3} since it's already attached",
-//                    group.Name, group.LocalId, sp.Name, AttachmentPt);
-
-                return false;
-            }
-
-//                m_log.DebugFormat(
-//                    "[ATTACHMENTS MODULE]: Attaching object {0} {1} to {2} point {3} from ground (silent = {4})",
-//                    group.Name, group.LocalId, sp.Name, attachmentPt, silent);
-
             if (group.GetSittingAvatarsCount() != 0)
             {
 //                    m_log.WarnFormat(
@@ -327,50 +314,67 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return false;
             }
 
-            Vector3 attachPos = group.AbsolutePosition;
+            List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
 
-            // TODO: this short circuits multiple attachments functionality  in  LL viewer 2.1+ and should
-            // be removed when that functionality is implemented in opensim
-            attachmentPt &= 0x7f;
-            
-            // If the attachment point isn't the same as the one previously used
-            // set it's offset position = 0 so that it appears on the attachment point
-            // and not in a weird location somewhere unknown.
-            if (attachmentPt != (uint)AttachmentPoint.Default && attachmentPt != group.AttachmentPoint)
+            if (attachments.Contains(group))
             {
-                attachPos = Vector3.Zero;
+//                m_log.WarnFormat(
+//                    "[ATTACHMENTS MODULE]: Ignoring request to attach {0} {1} to {2} on {3} since it's already attached",
+//                    group.Name, group.LocalId, sp.Name, AttachmentPt);
+
+                return false;
             }
 
-            // AttachmentPt 0 (default) means the client chose to 'wear' the attachment.
-            if (attachmentPt == (uint)AttachmentPoint.Default)
+            // If we already have 5, remove the oldest until only 4 are left. Skip over temp ones
+            while (attachments.Count >= 5)
             {
-                // Check object for stored attachment point
-                attachmentPt = group.AttachmentPoint;
+                if (attachments[0].FromItemID != UUID.Zero)
+                    DetachSingleAttachmentToInv(sp, attachments[0]);
+                attachments.RemoveAt(0);
             }
 
-            // if we still didn't find a suitable attachment point.......
-            if (attachmentPt == 0)
+            // If we're not appending, remove the rest as well
+            if (attachments.Count != 0 && !append)
             {
-                // Stick it on left hand with Zero Offset from the attachment point.
-                attachmentPt = (uint)AttachmentPoint.LeftHand;
-                attachPos = Vector3.Zero;
+                foreach (SceneObjectGroup g in attachments)
+                {
+                    if (g.FromItemID != UUID.Zero)
+                        DetachSingleAttachmentToInv(sp, g);
+                }
             }
 
-            // Remove any previous attachments
-            List<SceneObjectGroup> existingAttachments = sp.GetAttachments(attachmentPt);
-
-            // At the moment we can only deal with a single attachment
-            if (existingAttachments.Count != 0 && existingAttachments[0].FromItemID != UUID.Zero)
-                DetachSingleAttachmentToInv(sp, existingAttachments[0]);
-
             lock (sp.AttachmentsSyncLock)
             {
+                Vector3 attachPos = group.AbsolutePosition;
+                // If the attachment point isn't the same as the one previously used
+                // set it's offset position = 0 so that it appears on the attachment point
+                // and not in a weird location somewhere unknown.
+                if (attachmentPt != 0 && attachmentPt != group.AttachmentPoint)
+                {
+                    attachPos = Vector3.Zero;
+                }
+
+                // AttachmentPt 0 means the client chose to 'wear' the attachment.
+                if (attachmentPt == 0)
+                {
+                    // Check object for stored attachment point
+                    attachmentPt = group.AttachmentPoint;
+                }
+
+                // if we still didn't find a suitable attachment point.......
+                if (attachmentPt == 0)
+                {
+                    // Stick it on left hand with Zero Offset from the attachment point.
+                    attachmentPt = (uint)AttachmentPoint.LeftHand;
+                    attachPos = Vector3.Zero;
+                }
+
                 group.AttachmentPoint = attachmentPt;
                 group.AbsolutePosition = attachPos;
 
                 if (sp.PresenceType != PresenceType.Npc)
-                    UpdateUserInventoryWithAttachment(sp, group, attachmentPt, temp);
-
+                    UpdateUserInventoryWithAttachment(sp, group, attachmentPt, temp, append);
+    
                 AttachToAgent(sp, group, attachmentPt, attachPos, silent);
 
                 if (resumeScripts)
@@ -388,8 +392,10 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             return true;
         }
 
-        private void UpdateUserInventoryWithAttachment(IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool temp)
+        private void UpdateUserInventoryWithAttachment(IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool temp, bool append)
         {
+            List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
+
             // Add the new attachment to inventory if we don't already have it.
             if (!temp)
             {
@@ -397,7 +403,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 if (newAttachmentItemID == UUID.Zero)
                     newAttachmentItemID = AddSceneObjectAsNewAttachmentInInv(sp, group).ID;
 
-                ShowAttachInUserInventory(sp, attachmentPt, newAttachmentItemID, group);
+                ShowAttachInUserInventory(sp, attachmentPt, newAttachmentItemID, group, append);
             }
         }
 
@@ -410,8 +416,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 //                "[ATTACHMENTS MODULE]: RezSingleAttachmentFromInventory to point {0} from item {1} for {2} in {3}",
 //                (AttachmentPoint)AttachmentPt, itemID, sp.Name, m_scene.Name);
 
-            // TODO: this short circuits multiple attachments functionality  in  LL viewer 2.1+ and should
-            // be removed when that functionality is implemented in opensim
+            bool append = (AttachmentPt & 0x80) != 0;
             AttachmentPt &= 0x7f;
 
             // Viewer 2/3 sometimes asks to re-wear items that are already worn (and show up in it's inventory as such).
@@ -440,7 +445,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return null;
             }
 
-            return RezSingleAttachmentFromInventoryInternal(sp, itemID, UUID.Zero, AttachmentPt);
+            return RezSingleAttachmentFromInventoryInternal(sp, itemID, UUID.Zero, AttachmentPt, append);
         }
 
         public void RezMultipleAttachmentsFromInventory(IScenePresence sp, List<KeyValuePair<UUID, uint>> rezlist)
@@ -840,8 +845,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             so.RemoveScriptInstances(true);
         }
 
-        private SceneObjectGroup RezSingleAttachmentFromInventoryInternal(
-            IScenePresence sp, UUID itemID, UUID assetID, uint attachmentPt)
+        protected SceneObjectGroup RezSingleAttachmentFromInventoryInternal(
+            IScenePresence sp, UUID itemID, UUID assetID, uint attachmentPt, bool append)
         {
             if (m_invAccessModule == null)
                 return null;
@@ -884,7 +889,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             // This will throw if the attachment fails
             try
             {
-                AttachObjectInternal(sp, objatt, attachmentPt, false, false, true);
+                AttachObjectInternal(sp, objatt, attachmentPt, false, false, append);
             }
             catch (Exception e)
             {
@@ -911,7 +916,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
         /// <param name="AttachmentPt"></param>
         /// <param name="itemID"></param>
         /// <param name="att"></param>
-        private void ShowAttachInUserInventory(IScenePresence sp, uint AttachmentPt, UUID itemID, SceneObjectGroup att)
+        private void ShowAttachInUserInventory(IScenePresence sp, uint AttachmentPt, UUID itemID, SceneObjectGroup att, bool append)
         {
 //            m_log.DebugFormat(
 //                "[USER INVENTORY]: Updating attachment {0} for {1} at {2} using item ID {3}",
@@ -934,7 +939,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             if (item == null)
                 return;
 
-            bool changed = sp.Appearance.SetAttachment((int)AttachmentPt, itemID, item.AssetID);
+            int attFlag = append ? 0x80 : 0;
+            bool changed = sp.Appearance.SetAttachment((int)AttachmentPt | attFlag, itemID, item.AssetID);
             if (changed && m_scene.AvatarFactory != null)
             {
 //                m_log.DebugFormat(
@@ -1018,12 +1024,19 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                     return;
                 }
 
-                // TODO: this short circuits multiple attachments functionality  in  LL viewer 2.1+ and should
-                // be removed when that functionality is implemented in opensim
+                bool append = (AttachmentPt & 0x80) != 0;
                 AttachmentPt &= 0x7f;
 
                 // Calls attach with a Zero position
-                AttachObject(sp, part.ParentGroup, AttachmentPt, false, false);
+                if (AttachObject(sp, part.ParentGroup, AttachmentPt, false, false, append))
+                {
+//                    m_log.Debug(
+//                        "[ATTACHMENTS MODULE]: Saving avatar attachment. AgentID: " + remoteClient.AgentId
+//                        + ", AttachmentPoint: " + AttachmentPt);
+
+                    // Save avatar attachment information
+                    m_scene.EventManager.TriggerOnAttach(objectLocalID, part.ParentGroup.FromItemID, remoteClient.AgentId);
+                }
             }
             catch (Exception e)
             {
@@ -1076,4 +1089,4 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 
         #endregion
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index 719a59c..0c1df6a 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -197,7 +197,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             SceneObjectGroup so = SceneHelpers.AddSceneObject(scene, attName, sp.UUID);
 
             m_numberOfAttachEventsFired = 0;
-            scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Chest, false, false);
+            scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Chest, false, false, false);
 
             // Check status on scene presence
             Assert.That(sp.HasAttachments(), Is.True);
@@ -368,7 +368,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             sp2.AbsolutePosition = new Vector3(0, 0, 0);
             sp2.HandleAgentRequestSit(sp2.ControllingClient, sp2.UUID, so.UUID, Vector3.Zero);
 
-            scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Chest, false, false);
+            scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Chest, false, false, false);
 
             Assert.That(sp.HasAttachments(), Is.False);
             Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
@@ -888,4 +888,4 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(0));
         }
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs b/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
index 620ec22..46daab3 100644
--- a/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
@@ -83,7 +83,7 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <param name="AttachmentPt"></param>
         /// <param name="silent"></param>
         /// <returns>true if the object was successfully attached, false otherwise</returns>
-        bool AttachObject(IScenePresence sp, SceneObjectGroup grp, uint AttachmentPt, bool silent, bool temp);
+        bool AttachObject(IScenePresence sp, SceneObjectGroup grp, uint AttachmentPt, bool silent, bool temp, bool append);
 
         /// <summary>
         /// Rez an attachment from user inventory and change inventory status to match.
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 14dac7a..3c91c5b 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -2741,7 +2741,7 @@ namespace OpenSim.Region.Framework.Scenes
                     RootPrim.RemFlag(PrimFlags.TemporaryOnRez);
                     
                     if (AttachmentsModule != null)
-                        AttachmentsModule.AttachObject(sp, grp, 0, false, false);
+                        AttachmentsModule.AttachObject(sp, grp, 0, false, false, true);
                 }
                 else
                 {
diff --git a/OpenSim/Region/OptionalModules/Avatar/Attachments/TempAttachmentsModule.cs b/OpenSim/Region/OptionalModules/Avatar/Attachments/TempAttachmentsModule.cs
index 1e7bc02..e9ddbbe 100644
--- a/OpenSim/Region/OptionalModules/Avatar/Attachments/TempAttachmentsModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/Attachments/TempAttachmentsModule.cs
@@ -183,7 +183,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.Attachments
                 hostPart.ParentGroup.RootPart.ScheduleFullUpdate();
             }
 
-            return attachmentsModule.AttachObject(target, hostPart.ParentGroup, (uint)attachmentPoint, false, true) ? 1 : 0;
+            return attachmentsModule.AttachObject(target, hostPart.ParentGroup, (uint)attachmentPoint, false, true, true) ? 1 : 0;
         }
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index f07b645..e1f0071 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -3063,7 +3063,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             IAttachmentsModule attachmentsModule = m_ScriptEngine.World.AttachmentsModule;
 
             if (attachmentsModule != null)
-                return attachmentsModule.AttachObject(presence, grp, (uint)attachmentPoint, false, false);
+                return attachmentsModule.AttachObject(presence, grp, (uint)attachmentPoint, false, true, true);
             else
                 return false;
         }
diff --git a/OpenSim/Services/Interfaces/IAvatarService.cs b/OpenSim/Services/Interfaces/IAvatarService.cs
index 863fd93..6ca0b15 100644
--- a/OpenSim/Services/Interfaces/IAvatarService.cs
+++ b/OpenSim/Services/Interfaces/IAvatarService.cs
@@ -174,11 +174,18 @@ namespace OpenSim.Services.Interfaces
 
             // Attachments
             List<AvatarAttachment> attachments = appearance.GetAttachments();
+            Dictionary<int, List<string>> atts = new Dictionary<int, List<string>>();
             foreach (AvatarAttachment attach in attachments)
             {
                 if (attach.ItemID != UUID.Zero)
-                    Data["_ap_" + attach.AttachPoint] = attach.ItemID.ToString();
+                {
+                    if (!atts.ContainsKey(attach.AttachPoint))
+                        atts[attach.AttachPoint] = new List<string>();
+                    atts[attach.AttachPoint].Add(attach.ItemID.ToString());
+                }
             }
+            foreach (KeyValuePair<int, List<string>> kvp in atts)
+                Data["_ap_" + kvp.Key] = string.Join(",", kvp.Value.ToArray());
         }
 
         public AvatarAppearance ToAvatarAppearance()
@@ -304,10 +311,16 @@ namespace OpenSim.Services.Interfaces
                     if (!Int32.TryParse(pointStr, out point))
                         continue;
 
-                    UUID uuid = UUID.Zero;
-                    UUID.TryParse(_kvp.Value, out uuid);
+                    List<string> idList = new List<string>(_kvp.Value.Split(new char[] {','}));
 
-                    appearance.SetAttachment(point, uuid, UUID.Zero);
+                    appearance.SetAttachment(point, UUID.Zero, UUID.Zero);
+                    foreach (string id in idList)
+                    {
+                        UUID uuid = UUID.Zero;
+                        UUID.TryParse(id, out uuid);
+
+                        appearance.SetAttachment(point | 0x80, uuid, UUID.Zero);
+                    }
                 }
 
                 if (appearance.Wearables[AvatarWearable.BODY].Count == 0)