begin libadwaita headerbar tabs integration

src/app/browser/window/header/bar/widget.rs

@@ -0,0 +1,34 @@
+use adw::TabBar;
+use gtk::{prelude::BoxExt, Box, Button, MenuButton, Orientation, WindowControls};
+use std::sync::Arc;
+
+pub struct Widget {
+    gobject: Box,
+}
+
+impl Widget {
+    // Construct
+    pub fn new_arc(
+        control: &WindowControls,
+        append: &Button,
+        menu: &MenuButton,
+        tab: &TabBar,
+    ) -> Arc<Self> {
+        let gobject = Box::builder()
+            .orientation(Orientation::Horizontal)
+            .spacing(8)
+            .build();
+
+        gobject.append(tab);
+        gobject.append(append);
+        gobject.append(menu);
+        gobject.append(control);
+
+        Arc::new(Self { gobject })
+    }
+
+    // Getters
+    pub fn gobject(&self) -> &Box {
+        &self.gobject
+    }
+}