draft viewport integration

src/app/browser/main/tab/page/content/text.cpp

@@ -12,11 +12,20 @@ Text::Text()
 void Text::set_gemini(
     const Glib::ustring & GEMTEXT
 ) {
-    set_child(
+    auto viewport = new Gtk::Viewport( // @TODO
+        NULL, //Gtk::Adjustment::H
+        NULL  //Gtk::Adjustment::V
+    );
+
+    viewport->set_child(
         * new text::Gemini( // @TODO manage
             GEMTEXT
         )
     );
+
+    set_child(
+        * viewport
+    );
 }
 
 void Text::set_plain(

src/app/browser/main/tab/page/content/text.hpp

@@ -2,7 +2,9 @@
 #define APP_BROWSER_MAIN_TAB_PAGE_CONTENT_TEXT_HPP
 
 #include <glibmm/ustring.h>
+//#include <gtkmm/adjustment.h> @TODO
 #include <gtkmm/scrolledwindow.h>
+#include <gtkmm/viewport.h>
 
 namespace app::browser::main::tab::page::content
 {