WIP: (conditional) addition of SSD installation page, some code-reorganizations, fix of stack sidebar tabbing, exit directly without cleanup script

src/main.rs

@@ -1000,4 +1000,28 @@ fn build_ui(app: &Application) {
     if got_nvme {
         build_encrypt_page(&stack, &window);
     }
+
+    let key_ctrl = gtk::EventControllerKey::new();
+    window.add_controller(key_ctrl.clone());
+    key_ctrl.connect_key_pressed(move |_a, key, _b, _c| {
+        if key == gdk::Key::Tab || key == gdk::Key::ISO_Left_Tab {
+            match GtkWindowExt::focus(&window) {
+                Some(w) if w.is::<gtk::ListBoxRow>() && w.parent().unwrap().parent().unwrap().parent().unwrap().parent().unwrap().is::<StackSidebar>() => {
+                    let old_focus_idx = w.clone().downcast::<gtk::ListBoxRow>().unwrap().index();
+                    let new_focus_idx = old_focus_idx + match key {
+                        gdk::Key::Tab => 1,
+                        _ => -1
+                    };
+                    if new_focus_idx >= 0 && new_focus_idx < 8 {
+                        let list_box = w.parent().unwrap().downcast::<gtk::ListBox>().unwrap();
+                        let next_row = list_box.row_at_index(new_focus_idx.try_into().unwrap()).unwrap();
+                        next_row.grab_focus();
+                        return glib::Propagation::Stop
+                    }
+                },
+                _ => ()
+            }
+        }
+        glib::Propagation::Proceed
+    });
 }

[minute]

This parent().unwrap() cascade is really something! (This would panic on any ListBox that doesn't have that many parents, right?)

[plom]

From my GTK experiments, it accurately represents the depth any ListBoxRow should find itself in, so the unwrap() /should/ never panic. But I guess it's better to be safe than sorry, so I'll replace them with some more graceful handling.

[plom]

@mntmn New pattern: !11 (d5009180)