make submenus build by separated class methods

src/app/browser/header/menu.cpp

@@ -4,114 +4,156 @@ using namespace app::browser::header;
 
 Menu::Menu()
 {
-    // Set widget defaults
     set_tooltip_text(
         _("Menu")
     );
 
-    // Build tab submenu model
-    main_tab = Gio::Menu::create();
+    set_menu_model(
+        main(
+            main_tab(
+                main_tab_page(
+                    main_tab_page_navigation(
+                        main_tab_page_navigation_history()
+                    )
+                ),
+                main_tab_close()
+            ),
+            main_tools()
+        )
+    );
+}
 
-        main_tab->append(
-            _("New tab.."),
-            "win.main_tab_append"
+Glib::RefPtr<Gio::Menu> Menu::main(
+    Glib::RefPtr<Gio::Menu> main_tab,
+    Glib::RefPtr<Gio::Menu> main_tools
+) {
+    auto model = Gio::Menu::create();
+
+    model->append_submenu(
+        _("Tab"),
+        main_tab
+    );
+
+    model->append_submenu(
+        _("Tools"),
+        main_tools
     );
 
-        // Build tab page submenu model
-        main_tab_page = Gio::Menu::create();
+    model->append(
+        _("Quit"),
+        "app.quit"
+    );
 
-            // Build tab page navigation submenu model
-            main_tab_page_navigation = Gio::Menu::create();
+    return model;
+}
 
-                // Build tab page navigation history submenu model
-                main_tab_page_navigation_history = Gio::Menu::create();
+Glib::RefPtr<Gio::Menu> Menu::main_tab(
+    Glib::RefPtr<Gio::Menu> main_tab_page,
+    Glib::RefPtr<Gio::Menu> main_tab_close
+) {
+    auto model = Gio::Menu::create();
 
-                    main_tab_page_navigation_history->append(
-                        _("Back"),
-                        "win.main_tab_page_navigation_history_try_back"
+    model->append(
+        _("New.."),
+        "win.main_tab_append"
     );
 
-                    main_tab_page_navigation_history->append(
-                        _("Forward"),
-                        "win.main_tab_page_navigation_history_try_forward"
+    model->append_submenu(
+        _("Page"),
+        main_tab_page
+    );
+
+    model->append_submenu(
+        _("Close"),
+        main_tab_close
+    );
+
+    return model;
+}
+
+Glib::RefPtr<Gio::Menu> Menu::main_tab_page(
+    Glib::RefPtr<Gio::Menu> main_tab_page_navigation
+) {
+    auto model = Gio::Menu::create();
+
+    model->append_submenu(
+        _("Navigation"),
+        main_tab_page_navigation
     );
 
-                main_tab_page_navigation->append_submenu(
+    return model;
+}
+
+Glib::RefPtr<Gio::Menu> Menu::main_tab_page_navigation(
+    Glib::RefPtr<Gio::Menu> main_tab_page_navigation_history
+) {
+    auto model = Gio::Menu::create();
+
+    model->append_submenu(
         _("History"),
         main_tab_page_navigation_history
     );
 
-                main_tab_page_navigation->append(
+    model->append(
         _("Update"),
         "win.main_tab_page_update"
     );
 
-            main_tab_page->append_submenu(
-                _("Navigation"),
-                main_tab_page_navigation
+    return model;
+}
+
+Glib::RefPtr<Gio::Menu> Menu::main_tab_page_navigation_history()
+{
+    auto model = Gio::Menu::create();
+
+    model->append(
+        _("Back"),
+        "win.main_tab_page_navigation_history_try_back"
     );
 
-        main_tab->append_submenu(
-            _("Page"),
-            main_tab_page
+    model->append(
+        _("Forward"),
+        "win.main_tab_page_navigation_history_try_forward"
     );
 
-        // Build tab close submenu model
-        main_tab_close = Gio::Menu::create();
+    return model;
+}
 
-            main_tab_close->append(
+Glib::RefPtr<Gio::Menu> Menu::main_tab_close()
+{
+    auto model = Gio::Menu::create();
+
+    model->append(
         _("Active tab"),
         "win.main_tab_close"
     );
 
-            main_tab_close->append(
+    model->append(
         _("All tabs to left"),
         "win.main_tab_close_left"
     );
 
-            main_tab_close->append(
+    model->append(
         _("All tabs to right"),
         "win.main_tab_close_right"
     );
 
-            main_tab_close->append(
+    model->append(
         _("All tabs"),
         "win.main_tab_close_all"
     );
 
-        main_tab->append_submenu(
-            _("Close"),
-            main_tab_close
-        );
+    return model;
+}
 
-    // Build tools submenu model
-    main_tools = Gio::Menu::create();
+Glib::RefPtr<Gio::Menu> Menu::main_tools()
+{
+    auto model = Gio::Menu::create();
 
-        main_tools->append(
+    model->append(
         _("Debug"),
         "win.debug"
     );
 
-    // Build main menu model
-    main = Gio::Menu::create();
-
-        main->append_submenu(
-            _("Tab"),
-            main_tab
-        );
-
-        main->append_submenu(
-            _("Tools"),
-            main_tools
-        );
-
-        main->append(
-            _("Quit"),
-            "app.quit"
-        );
-
-    // Apply model
-    set_menu_model(
-        main
-    );
+    return model;
 }

src/app/browser/header/menu.hpp

@@ -9,13 +9,34 @@ namespace app::browser::header
 {
     class Menu : public Gtk::MenuButton
     {
-        Glib::RefPtr<Gio::Menu> main,
-                                    main_tab,
-                                        main_tab_page,
-                                            main_tab_page_navigation,
-                                                main_tab_page_navigation_history,
-                                        main_tab_close,
-                                    main_tools;
+        // 1 level
+        Glib::RefPtr<Gio::Menu> main(
+            Glib::RefPtr<Gio::Menu> main_tab,
+            Glib::RefPtr<Gio::Menu> main_tools
+        );
+
+            // 2 level
+            Glib::RefPtr<Gio::Menu> main_tab(
+                Glib::RefPtr<Gio::Menu> main_tab_page,
+                Glib::RefPtr<Gio::Menu> main_tab_close
+            );
+
+                // 3 level
+                Glib::RefPtr<Gio::Menu> main_tab_page(
+                    Glib::RefPtr<Gio::Menu> main_tab_page_navigation
+                );
+
+                    // 4 level
+                    Glib::RefPtr<Gio::Menu> main_tab_page_navigation(
+                        Glib::RefPtr<Gio::Menu> main_tab_page_navigation_history
+                    );
+
+                        // 5 level
+                        Glib::RefPtr<Gio::Menu> main_tab_page_navigation_history();
+
+                Glib::RefPtr<Gio::Menu> main_tab_close();
+
+            Glib::RefPtr<Gio::Menu> main_tools();
 
         public: