Hide top level scrollkeeper menu item if it's empty

Differential revision: https://phabricator.kde.org/D27403

navigator.cpp

@@ -275,7 +275,7 @@ void Navigator::insertInfoDocs( NavigatorItem *topItem )
 void Navigator::insertScrollKeeperDocs( NavigatorItem *topItem )
 {
   ScrollKeeperTreeBuilder *builder = new ScrollKeeperTreeBuilder( this );
-  builder->build( topItem );
+  builder->buildOrHide( topItem );
 }
 
 void Navigator::selectItem( const QUrl &url )

scrollkeepertreebuilder.cpp

@@ -45,6 +45,13 @@ void ScrollKeeperTreeBuilder::loadConfig()
   mShowEmptyDirs = Prefs::showEmptyDirs();
 }
 
+void ScrollKeeperTreeBuilder::buildOrHide( NavigatorItem *parent )
+{
+  build(parent);
+
+  parent->setHidden(parent->childCount() == 0);
+}
+
 void ScrollKeeperTreeBuilder::build( NavigatorItem *parent )
 {
   QString lang = QLocale().bcp47Name();

scrollkeepertreebuilder.h

@@ -36,6 +36,8 @@ class ScrollKeeperTreeBuilder : public QObject
 
     void build( NavigatorItem *parent );
 
+    void buildOrHide( NavigatorItem *parent );
+
   private:
     void loadConfig();
     int insertSection( NavigatorItem *parent,