EXT-7747 FIXED Disable the "Add" item of wearable context menu when it's inappropriate.

The "Add" item of wearable context menu is now disabled if multiple clothes selected
or when you can't add more wearables of the given type (max number is worn).

Reviewed by Nyx at https://codereview.productengine.com/secondlife/r/595/

--HG--
branch : product-engine

indra/newview/llwearableitemslist.cpp

@@ -647,6 +647,7 @@ void LLWearableItemsList::ContextMenu::updateItemsVisibility(LLContextMenu* menu
 
 	// *TODO: eliminate multiple traversals over the menu items
 	setMenuItemVisible(menu, "wear_add",			mask == MASK_CLOTHING && n_worn == 0);
+	setMenuItemEnabled(menu, "wear_add",			n_items == 1 && canAddWearable(ids.front()));
 	setMenuItemVisible(menu, "wear",				n_worn == 0);
 	setMenuItemVisible(menu, "edit",				!standalone && mask & (MASK_CLOTHING|MASK_BODYPART));
 	setMenuItemEnabled(menu, "edit",				n_editable == 1 && n_worn == 1 && n_items == 1);
@@ -740,4 +741,23 @@ void LLWearableItemsList::ContextMenu::createNewWearable(const LLUUID& item_id)
 	LLAgentWearables::createWearable(item->getWearableType(), true);
 }
 
+// Can we wear another wearable of the given item's wearable type?
+// static
+bool LLWearableItemsList::ContextMenu::canAddWearable(const LLUUID& item_id)
+{
+	if (!gAgentWearables.areWearablesLoaded())
+	{
+		return false;
+	}
+
+	LLViewerInventoryItem* item = gInventory.getItem(item_id);
+	if (!item || item->getType() != LLAssetType::AT_CLOTHING)
+	{
+		return false;
+	}
+
+	U32 wearable_count = gAgentWearables.getWearableCount(item->getWearableType());
+	return wearable_count < LLAgentWearables::MAX_CLOTHING_PER_TYPE;
+}
+
 // EOF

indra/newview/llwearableitemslist.h

@@ -342,6 +342,7 @@ class LLWearableItemsList : public LLInventoryItemsList
 		static void setMenuItemEnabled(LLContextMenu* menu, const std::string& name, bool val);
 		static void updateMask(U32& mask, LLAssetType::EType at);
 		static void createNewWearable(const LLUUID& item_id);
+		static bool canAddWearable(const LLUUID& item_id);
 
 		LLWearableItemsList*	mParent;
 	};