implement header subtitle widget

Makefile

@@ -9,6 +9,7 @@ SRCS =  src/main.cpp\
 		src/app/browser.cpp\
 		src/app/browser/header.cpp\
 		src/app/browser/header/main.cpp\
+		src/app/browser/header/main/subtitle.cpp\
 		src/app/browser/header/main/title.cpp\
 		src/app/browser/header/menu.cpp\
 		src/app/browser/header/tab.cpp\

po/POTFILES.in

@@ -1,6 +1,7 @@
 src/app/browser.cpp
 src/app/browser/header.cpp
 src/app/browser/header/main.cpp
+src/app/browser/header/main/subtitle.cpp
 src/app/browser/header/main/title.cpp
 src/app/browser/header/menu.cpp
 src/app/browser/header/tab.cpp

src/app/browser/header/main.cpp

@@ -1,5 +1,6 @@
 #include "main.hpp"
 #include "main/title.hpp"
+#include "main/subtitle.hpp"
 
 using namespace app::browser::header;
 
@@ -11,26 +12,33 @@ Main::Main()
     );
 
     set_homogeneous(
-        true
+        HOMOGENEOUS
     );
 
     // Init title
-    title = new main::Title();
+    mainTitle = new main::Title();
 
     append(
-        * title
+        * mainTitle
+    );
+
+    mainSubtitle = new main::Subtitle();
+
+    append(
+        * mainSubtitle
     );
 }
 
 Main::~Main()
 {
-    delete title;
+    delete mainTitle;
+    delete mainSubtitle;
 }
 
 void Main::set_title(
-    const Glib::ustring value
+    const Glib::ustring & TEXT
 ) {
-    title->set(
+    mainTitle->set(
-        value
+        TEXT
     );
 }

src/app/browser/header/main.hpp

@@ -9,11 +9,15 @@ namespace app::browser::header
     namespace main
     {
         class Title;
+        class Subtitle;
     }
 
     class Main : public Gtk::Box
     {
-        main::Title * title;
+        main::Title * mainTitle;
+        main::Subtitle * mainSubtitle;
+
+        const bool HOMOGENEOUS = true;
 
         public:
 
@@ -22,7 +26,7 @@ namespace app::browser::header
             ~Main();
 
             void set_title(
-                const Glib::ustring text
+                const Glib::ustring & TEXT
             );
     };
 }

src/app/browser/header/main/subtitle.cpp

@@ -0,0 +1,36 @@
+#include "subtitle.hpp"
+
+using namespace app::browser::header::main;
+
+Subtitle::Subtitle()
+{
+    add_css_class(
+        "subtitle"
+    );
+
+    set_single_line_mode(
+        true
+    );
+
+    set_ellipsize(
+        Pango::EllipsizeMode::END
+    );
+
+    set_valign(
+        Gtk::Align::CENTER
+    );
+
+    set_width_chars(
+        WIDTH_CHARS
+    );
+}
+
+Subtitle::~Subtitle() = default;
+
+void Subtitle::set(
+    const Glib::ustring & TEXT
+) {
+    set_text(
+        TEXT
+    );
+}

src/app/browser/header/main/subtitle.hpp

@@ -0,0 +1,27 @@
+#ifndef APP_BROWSER_HEADER_MAIN_SUBTITLE_HPP
+#define APP_BROWSER_HEADER_MAIN_SUBTITLE_HPP
+
+#include <glibmm/ustring.h>
+#include <gtkmm/enums.h>
+#include <gtkmm/label.h>
+#include <pangomm/layout.h>
+
+namespace app::browser::header::main
+{
+    class Subtitle : public Gtk::Label
+    {
+        const int WIDTH_CHARS = 5;
+
+        public:
+
+            Subtitle();
+
+            ~Subtitle();
+
+            void set(
+                const Glib::ustring & TEXT
+            );
+    };
+}
+
+#endif // APP_BROWSER_HEADER_MAIN_SUBTITLE_HPP