Resolves: tdf#92776 ensure correct notebook tab font color

despite various theme layout differences

Change-Id: I209258583571b57b2b7869937fa4821855125eac

vcl/inc/unx/gtk/gtkgdi.hxx

@@ -33,6 +33,7 @@
 
 enum class GtkControlPart
 {
+    ToplevelWindow,
     Button,
     LinkButton,
     CheckButton,
@@ -72,6 +73,9 @@ enum class GtkControlPart
     NotebookStack,
     NotebookHeaderTabs,
     NotebookHeaderTabsTab,
+    NotebookHeaderTabsTabLabel,
+    NotebookHeaderTabsTabActiveLabel,
+    NotebookHeaderTabsTabHoverLabel,
     FrameBorder,
     MenuBar,
     MenuBarItem,
@@ -118,10 +122,13 @@ public:
 
     virtual void GetResolution(sal_Int32& rDPIX, sal_Int32& rDPIY) override;
 
-    static GtkStyleContext* createNewContext(GtkControlPart ePart, gtk_widget_path_iter_set_object_nameFunc set_object_name);
-    static GtkStyleContext* createOldContext(GtkControlPart ePart);
+    GtkStyleContext* createStyleContext(gtk_widget_path_iter_set_object_nameFunc set_object_name, GtkControlPart ePart);
+    GtkStyleContext* createNewContext(GtkControlPart ePart, gtk_widget_path_iter_set_object_nameFunc set_object_name);
+    GtkStyleContext* createOldContext(GtkControlPart ePart);
+    GtkStyleContext* makeContext(GtkWidgetPath *pPath, GtkStyleContext *pParent);
 private:
     GtkWidget       *mpWindow;
+    static GtkStyleContext *mpWindowStyle;
     static GtkStyleContext *mpButtonStyle;
     static GtkStyleContext *mpLinkButtonStyle;
     static GtkStyleContext *mpEntryStyle;
@@ -171,6 +178,8 @@ private:
     static GtkStyleContext *mpNotebookHeaderTabsStyle;
     static GtkStyleContext *mpNotebookHeaderTabsTabStyle;
     static GtkStyleContext *mpNotebookHeaderTabsTabLabelStyle;
+    static GtkStyleContext *mpNotebookHeaderTabsTabActiveLabelStyle;
+    static GtkStyleContext *mpNotebookHeaderTabsTabHoverLabelStyle;
     static GtkStyleContext *mpMenuBarStyle;
     static GtkStyleContext *mpMenuBarItemStyle;
     static GtkStyleContext *mpMenuWindowStyle;