fix: ensure X window focus on unmap/map

src/shell/focus/mod.rs

@@ -212,6 +212,29 @@ impl Shell {
         state.common.shell.write().update_active();
     }
 
+    // We suppress Element(X) to Fullscreen(X) transition to avoid
+    // loss of focus by the X window when having a transition to fullscreen
+    // but in the case of X11 unmap/map the leave/enter needs to happen for the X11
+    // internal state to be focused on the window
+    pub fn set_focus_on_x11_map(
+        state: &mut State,
+        target: &KeyboardFocusTarget,
+        seat: &Seat<State>,
+        update_cursor: bool,
+    ) {
+        let need_reset = seat
+            .get_keyboard()
+            .and_then(|keyboard| keyboard.current_focus())
+            .and_then(|current| current.x11_surface())
+            .is_some_and(|current| Some(current) == target.x11_surface());
+
+        if need_reset {
+            update_focus_state(seat, None, state, None, false);
+        }
+
+        Shell::set_focus(state, Some(target), seat, None, update_cursor);
+    }
+
     pub fn append_focus_stack(&mut self, target: impl Into<FocusTarget>, seat: &Seat<State>) {
         let target = target.into();
         if target.is_minimized() {