tree: add Node::node_accepts_focus

src/ifs/wl_surface/x_surface/xwindow.rs

@@ -382,6 +382,10 @@ impl Node for Xwindow {
         self.toplevel_data.node_layer()
     }
 
+    fn node_accepts_focus(&self) -> bool {
+        self.tl_accepts_keyboard_focus()
+    }
+
     fn node_do_focus(self: Rc<Self>, seat: &Rc<WlSeatGlobal>, _direction: Direction) {
         seat.focus_toplevel(self.clone());
     }

src/ifs/wl_surface/zwlr_layer_surface_v1.rs

@@ -679,6 +679,10 @@ impl Node for ZwlrLayerSurfaceV1 {
         SurfaceExt::node_layer(self)
     }
 
+    fn node_accepts_focus(&self) -> bool {
+        self.keyboard_interactivity.get() != KI_NONE
+    }
+
     fn node_find_tree_at(
         &self,
         x: i32,

src/tree.rs

@@ -216,6 +216,11 @@ pub trait Node: 'static {
         let _ = title;
     }
 
+    #[expect(dead_code)]
+    fn node_accepts_focus(&self) -> bool {
+        true
+    }
+
     fn node_do_focus(self: Rc<Self>, seat: &Rc<WlSeatGlobal>, direction: Direction) {
         let _ = seat;
         let _ = direction;

src/tree/float.rs

@@ -720,6 +720,13 @@ impl Node for FloatNode {
         self.update_child_title(title);
     }
 
+    fn node_accepts_focus(&self) -> bool {
+        if let Some(c) = self.child.get() {
+            return c.tl_accepts_keyboard_focus();
+        }
+        false
+    }
+
     fn node_find_tree_at(
         &self,
         x: i32,