Make scripted items not stack (bug #2969)

CHANGELOG.md

@@ -1,6 +1,7 @@
 0.46.0
 ------
 
+    Bug #2969: Scripted items can stack
     Bug #2987: Editor: some chance and AI data fields can overflow
     Bug #3623: Fix HiDPI on Windows
     Bug #4411: Reloading a saved game while falling prevents damage in some cases

apps/openmw/mwscript/containerextensions.cpp

@@ -64,7 +64,19 @@ namespace MWScript
                             || ::Misc::StringUtils::ciEqual(item, "gold_100"))
                         item = "gold_001";
 
-                    MWWorld::Ptr itemPtr = *ptr.getClass().getContainerStore (ptr).add (item, count, ptr);
+                    MWWorld::ContainerStore& store = ptr.getClass().getContainerStore (ptr);
+                    // Create a Ptr for the first added item to recover the item name later
+                    MWWorld::Ptr itemPtr = *store.add (item, 1, ptr);
+                    if (itemPtr.getClass().getScript(itemPtr).empty())
+                    {
+                        store.add (item, count-1, ptr);
+                    }
+                    else
+                    {
+                        // Adding just one item per time to make sure there isn't a stack of scripted items
+                        for (int i = 1; i < count; i++)
+                            store.add (item, 1, ptr);
+                    }
 
                     // Spawn a messagebox (only for items added to player's inventory and if player is talking to someone)
                     if (ptr == MWBase::Environment::get().getWorld ()->getPlayerPtr() )
@@ -143,8 +155,13 @@ namespace MWScript
 
                     std::string itemName;
                     for (MWWorld::ConstContainerStoreIterator iter(store.cbegin()); iter != store.cend(); ++iter)
+                    {
                         if (::Misc::StringUtils::ciEqual(iter->getCellRef().getRefId(), item))
+                        {
                             itemName = iter->getClass().getName(*iter);
+                            break;
+                        }
+                    }
 
                     int numRemoved = store.remove(item, count, ptr);
 

apps/openmw/mwworld/containerstore.cpp

@@ -246,7 +246,9 @@ bool MWWorld::ContainerStore::stacks(const ConstPtr& ptr1, const ConstPtr& ptr2)
 
         && ptr1.getClass().getRemainingUsageTime(ptr1) == ptr2.getClass().getRemainingUsageTime(ptr2)
 
-        && cls1.getScript(ptr1) == cls2.getScript(ptr2)
+        // Items with scripts never stack
+        && cls1.getScript(ptr1).empty()
+        && cls2.getScript(ptr2).empty()
 
         // item that is already partly used up never stacks
         && (!cls1.hasItemHealth(ptr1) || (
@@ -306,7 +308,7 @@ MWWorld::ContainerStoreIterator MWWorld::ContainerStore::add (const Ptr& itemPtr
     item.getCellRef().unsetRefNum(); // destroy link to content file
 
     std::string script = item.getClass().getScript(item);
-    if(script != "")
+    if (!script.empty())
     {
         if (actorPtr == player)
         {