implement separated tab label class

src/app/browser/main/tab/label.cpp

@@ -0,0 +1,44 @@
+#include "label.hpp"
+
+using namespace app::browser::main::tab;
+
+Label::Label()
+{
+    set_text(
+        _("New tab")
+    );
+
+    // Setup label controller
+    controller = Gtk::GestureClick::create();
+
+        /* @TODO remove as default
+        controller->set_button(
+            GDK_BUTTON_PRIMARY
+        );*/
+
+        controller->signal_pressed().connect(
+            sigc::mem_fun(
+                * this,
+                & Label::on_click
+            )
+        );
+
+        add_controller(
+            controller
+        );
+}
+
+Label::~Label() = default;
+
+void Label::on_click(
+    int n,
+    double x,
+    double y
+) {
+    if (n == 2) // double click
+    {
+        //Tab::close(
+        //    -1 // active
+        //);
+    }
+}