MAINT-5274 Missing folder arrow

indra/llui/llfolderviewitem.cpp

@@ -128,6 +128,7 @@ LLFolderViewItem::LLFolderViewItem(const LLFolderViewItem::Params& p)
 	mSelectPending(FALSE),
 	mLabelStyle( LLFontGL::NORMAL ),
 	mHasVisibleChildren(FALSE),
+	mIsFolderComplete(true),
     mLocalIndentation(p.folder_indentation),
 	mIndentation(0),
 	mItemHeight(p.item_height),
@@ -672,7 +673,7 @@ void LLFolderViewItem::drawOpenFolderArrow(const Params& default_params, const L
 	//
 	const S32 TOP_PAD = default_params.item_top_pad;
 
-	if (hasVisibleChildren())
+	if (hasVisibleChildren() || !isFolderComplete())
 	{
 		LLUIImage* arrow_image = default_params.folder_arrow_image;
 		gl_draw_scaled_rotated_image(
@@ -932,6 +933,8 @@ LLFolderViewFolder::LLFolderViewFolder( const LLFolderViewItem::Params& p ):
 	mLastArrangeGeneration( -1 ),
 	mLastCalculatedWidth(0)
 {
+	// folder might have children that are not loaded yet. Mark it as incomplete until chance to check it.
+	mIsFolderComplete = false;
 }
 
 void LLFolderViewFolder::updateLabelRotation()
@@ -1014,6 +1017,12 @@ S32 LLFolderViewFolder::arrange( S32* width, S32* height )
 
 		mHasVisibleChildren = found;
 	}
+	if (!mIsFolderComplete)
+	{
+		mIsFolderComplete = getFolderViewModel()->isFolderComplete(this);
+	}
+
+
 
 	// calculate height as a single item (without any children), and reshapes rectangle to match
 	LLFolderViewItem::arrange( width, height );
@@ -1679,7 +1688,9 @@ void LLFolderViewFolder::setOpenArrangeRecursively(BOOL openitem, ERecurseType r
 	mIsOpen = openitem;
 		if(!was_open && openitem)
 		{
-		getViewModelItem()->openItem();
+			getViewModelItem()->openItem();
+			// openItem() will request content, it won't be incomplete
+			mIsFolderComplete = true;
 		}
 		else if(was_open && !openitem)
 		{

indra/llui/llfolderviewitem.h

@@ -114,6 +114,7 @@ protected:
 	F32							mControlLabelRotation;
 	LLFolderView*				mRoot;
 	bool						mHasVisibleChildren,
+								mIsFolderComplete, // indicates that some children were not loaded/added yet
 								mIsCurSelection,
 								mDragAndDropTarget,
 								mIsMouseOverTitle,
@@ -210,6 +211,9 @@ public:
 
 	BOOL hasVisibleChildren() { return mHasVisibleChildren; }
 
+	// true if object can't have children
+	BOOL isFolderComplete() { return mIsFolderComplete; }
+
 	// Call through to the viewed object and return true if it can be
 	// removed. Returns true if it's removed.
 	//virtual BOOL removeRecursively(BOOL single_item);

indra/llui/llfolderviewmodel.h

@@ -122,6 +122,7 @@ public:
 	virtual void filter() = 0;
 
 	virtual bool contentsReady() = 0;
+	virtual bool isFolderComplete(class LLFolderViewFolder*) = 0;
 	virtual void setFolderView(LLFolderView* folder_view) = 0;
 	virtual LLFolderViewFilter& getFilter() = 0;
 	virtual const LLFolderViewFilter& getFilter() const = 0;
@@ -442,6 +443,7 @@ public:
 	// By default, we assume the content is available. If a network fetch mechanism is implemented for the model,
 	// this method needs to be overloaded and return the relevant fetch status.
 	virtual bool contentsReady()					{ return true; }
+	virtual bool isFolderComplete(LLFolderViewFolder* folder)					{ return true; }
 
 	struct ViewModelCompare
 	{

indra/newview/llfolderviewmodelinventory.cpp

@@ -108,6 +108,29 @@ bool LLFolderViewModelInventory::contentsReady()
 	return !LLInventoryModelBackgroundFetch::instance().folderFetchActive();
 }
 
+bool LLFolderViewModelInventory::isFolderComplete(LLFolderViewFolder* folder)
+{
+	LLFolderViewModelItemInventory* modelp = static_cast<LLFolderViewModelItemInventory*>(folder->getViewModelItem());
+	LLUUID cat_id = modelp->getUUID();
+	if (cat_id.isNull())
+	{
+		return false;
+	}
+	LLViewerInventoryCategory* cat = gInventory.getCategory(cat_id);
+	if (cat)
+	{
+		// don't need to check version - descendents_server == -1 if we have no data
+		S32 descendents_server = cat->getDescendentCount();
+		S32 descendents_actual = cat->getViewerDescendentCount();
+		if (descendents_server == descendents_actual
+			|| (descendents_actual > 0 && descendents_server == -1)) // content was loaded in previous session
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
 void LLFolderViewModelItemInventory::requestSort()
 {
 	LLFolderViewModelItemCommon::requestSort();

indra/newview/llfolderviewmodelinventory.h

@@ -113,6 +113,7 @@ public:
 
 	void sort(LLFolderViewFolder* folder);
 	bool contentsReady();
+	bool isFolderComplete(LLFolderViewFolder* folder);
 	bool startDrag(std::vector<LLFolderViewModelItem*>& items);
 
 private: