use tab page private getter

src/app/browser/main/tab.cpp

@@ -29,35 +29,13 @@ Tab::~Tab() = default;
 Glib::ustring Tab::get_page_title(
     const int & PAGE_NUMBER
 ) {
-    auto pageWidget = get_nth_page(
+    return get_tab_page(PAGE_NUMBER)->get_title();
-        PAGE_NUMBER
-    );
-
-    if (pageWidget == nullptr)
-    {
-        throw _("Tab page not found!");
-    }
-
-    auto tabPage = (tab::Page *) pageWidget;
-
-    return tabPage->get_title();
 };
 
 Glib::ustring Tab::get_page_subtitle(
     const int & PAGE_NUMBER
 ) {
-    auto pageWidget = get_nth_page(
+    return get_tab_page(PAGE_NUMBER)->get_subtitle();
-        PAGE_NUMBER
-    );
-
-    if (pageWidget == nullptr)
-    {
-        throw _("Tab page not found!");
-    }
-
-    auto tabPage = (tab::Page *) pageWidget;
-
-    return tabPage->get_subtitle();
 };
 
 // Actions
@@ -167,4 +145,20 @@ void Tab::update(
         );
     }
 
-} // @TODO
+} // @TODO
+
+// Private helpers
+tab::Page * Tab::get_tab_page(
+    const int & PAGE_NUMBER
+) {
+    auto pageWidget = get_nth_page(
+        PAGE_NUMBER
+    );
+
+    if (pageWidget == nullptr)
+    {
+        throw _("Tab page not found!");
+    }
+
+    return (tab::Page *) pageWidget;
+}

src/app/browser/main/tab.hpp

@@ -7,11 +7,20 @@
 
 namespace app::browser::main
 {
+    namespace tab
+    {
+        class Page;
+    }
+
     class Tab : public Gtk::Notebook
     {
         const bool REORDERABLE = true;
         const bool SCROLLABLE = true;
 
+        tab::Page * get_tab_page(
+            const int & PAGE_NUMBER
+        );
+
         public:
 
             Tab();