Fix hover when focus is different from hover window

Fixes #14

src/server/event.rs

@@ -385,17 +385,23 @@ impl HandleEvent for Pointer {
                 ref surface,
                 surface_x,
                 surface_y,
-            } => {
-                let do_enter = || {
-                    debug!("entering surface ({serial})");
-                    if let Some(surface) = state.get_server_surface_from_client(surface.clone()) {
-                        self.server.enter(serial, surface, surface_x, surface_y)
-                    } else {
-                        warn!("could not enter surface: stale surface");
-                    }
-                };
+            } => 'enter: {
                 let surface_key: ObjectKey = surface.data().copied().unwrap();
-                let surface_data: &SurfaceData = state.objects[surface_key].as_ref();
+                let Some(surface_data): Option<&SurfaceData> =
+                    state.objects.get(surface_key).map(|o| o.as_ref())
+                else {
+                    warn!("could not enter surface: stale surface");
+                    break 'enter;
+                };
+
+                let mut do_enter = || {
+                    debug!("entering surface ({serial})");
+                    self.server
+                        .enter(serial, &surface_data.server, surface_x, surface_y);
+                    let window = surface_data.window.unwrap();
+                    state.connection.as_mut().unwrap().raise_to_top(window);
+                    state.last_hovered = Some(window);
+                };
 
                 if matches!(surface_data.role, Some(SurfaceRole::Popup(_))) {
                     match self.pending_enter.0.take() {

src/server/mod.rs

@@ -427,6 +427,7 @@ pub struct ServerState<C: XConnection> {
     qh: ClientQueueHandle,
     to_focus: Option<x::Window>,
     last_focused_toplevel: Option<x::Window>,
+    last_hovered: Option<x::Window>,
     connection: Option<C>,
 
     xdg_wm_base: XdgWmBase,
@@ -468,6 +469,7 @@ impl<C: XConnection> ServerState<C> {
             dh,
             to_focus: None,
             last_focused_toplevel: None,
+            last_hovered: None,
             connection: None,
             objects: Default::default(),
             associated_windows: Default::default(),
@@ -629,6 +631,9 @@ impl<C: XConnection> ServerState<C> {
         if matches!(self.last_focused_toplevel, Some(x) if x == window) {
             self.last_focused_toplevel.take();
         }
+        if self.last_hovered == Some(window) {
+            self.last_hovered.take();
+        }
         win.mapped = false;
 
         if let Some(key) = win.surface_key.take() {
@@ -792,9 +797,10 @@ impl<C: XConnection> ServerState<C> {
         let window_data = self.windows.get_mut(&window).unwrap();
         if window_data.attrs.override_redirect {
             // Override redirect is hard to convert to Wayland!
-            // We will just make them be popups for the last focused toplevel.
-            if let Some(win) = self.last_focused_toplevel {
-                window_data.attrs.popup_for = Some(win)
+            if let Some(win) = self.last_hovered {
+                window_data.attrs.popup_for = Some(win);
+            } else if let Some(win) = self.last_focused_toplevel {
+                window_data.attrs.popup_for = Some(win);
             }
         }
         let window = self.windows.get(&window).unwrap();
@@ -932,6 +938,9 @@ impl<C: XConnection> ServerState<C> {
         if self.last_focused_toplevel == Some(window) {
             self.last_focused_toplevel.take();
         }
+        if self.last_hovered == Some(window) {
+            self.last_hovered.take();
+        }
     }
 }
 

src/server/tests.rs

@@ -13,6 +13,7 @@ use wayland_client::{
         wl_compositor::WlCompositor,
         wl_display::WlDisplay,
         wl_keyboard::WlKeyboard,
+        wl_pointer::WlPointer,
         wl_registry::WlRegistry,
         wl_seat::{self, WlSeat},
         wl_shm::{Format, WlShm},
@@ -206,6 +207,13 @@ impl super::XConnection for FakeXConnection {
         );
         self.focused_window = window.into();
     }
+
+    fn raise_to_top(&mut self, window: Window) {
+        assert!(
+            self.windows.contains_key(&window),
+            "Unknown window: {window:?}"
+        );
+    }
 }
 
 type FakeServerState = ServerState<FakeXConnection>;
@@ -1120,6 +1128,56 @@ fn clipboard_x11_then_wayland() {
     }
 }
 
+#[test]
+fn raise_window_on_pointer_event() {
+    let (mut f, comp) = TestFixture::new_with_compositor();
+    TestObject::<WlPointer>::from_request(&comp.seat.obj, wl_seat::Request::GetPointer {});
+    let win1 = unsafe { Window::new(1) };
+    let (_, id1) = f.create_toplevel(&comp, win1);
+    f.testwl.configure_toplevel(id1, 100, 100, vec![]);
+
+    let win2 = unsafe { Window::new(2) };
+    let (_, id2) = f.create_toplevel(&comp, win2);
+    assert_eq!(f.connection().focused_window, Some(win2));
+
+    f.testwl.move_pointer_to(id2, 0.0, 0.0);
+    f.run();
+    assert_eq!(f.connection().focused_window, Some(win2));
+    assert_eq!(f.exwayland.last_hovered, Some(win2));
+
+    f.testwl.move_pointer_to(id1, 0.0, 0.0);
+    f.run();
+    assert_eq!(f.connection().focused_window, Some(win2));
+    assert_eq!(f.exwayland.last_hovered, Some(win1));
+}
+
+#[test]
+fn override_redirect_choose_hover_window() {
+    let (mut f, comp) = TestFixture::new_with_compositor();
+    TestObject::<WlPointer>::from_request(&comp.seat.obj, wl_seat::Request::GetPointer {});
+    let win1 = unsafe { Window::new(1) };
+    let (_, id1) = f.create_toplevel(&comp, win1);
+    f.testwl.configure_toplevel(id1, 100, 100, vec![]);
+
+    let win2 = unsafe { Window::new(2) };
+    let _ = f.create_toplevel(&comp, win2);
+    assert_eq!(f.connection().focused_window, Some(win2));
+
+    f.testwl.move_pointer_to(id1, 0.0, 0.0);
+    f.run();
+    assert_eq!(f.exwayland.last_hovered, Some(win1));
+
+    let win3 = unsafe { Window::new(3) };
+    let (buffer, surface) = comp.create_surface();
+    f.new_window(win3, true, WindowData::default(), None);
+    f.map_window(&comp, win3, &surface.obj, &buffer);
+    f.run();
+    let id3 = f.check_new_surface();
+    let popup_data = f.testwl.get_surface_data(id3).unwrap();
+    let win1_xdg = &f.testwl.get_surface_data(id1).unwrap().xdg().surface;
+    assert_eq!(&popup_data.popup().parent, win1_xdg);
+}
+
 /// See Pointer::handle_event for an explanation.
 #[test]
 fn popup_pointer_motion_workaround() {}