Hide mouse pointer when blanked

locker/src/main.rs

@@ -680,8 +680,9 @@ fn handle_unlock_dialog_quit(conn: &xcb::Connection, state: &mut State) -> anyho
                 if let Some(signum) = status.signal() {
                     warn!("Unlock dialog crashed with signal {}", signum);
                 }
+                hide_cursor(conn, state);
             },
-            Ok(Some(_)) => (),  // auth failed, dialog has quit, do nothing
+            Ok(Some(_)) => hide_cursor(conn, state),  // auth failed, dialog has quit, do nothing
             Ok(None) => state.unlock_dialog = Some(unlock_dialog),  // dialog still running
         }
     }
@@ -710,6 +711,8 @@ fn start_unlock_dialog<'a>(conn: &'a xcb::Connection, state: &State<'a>, trigger
         state.monitors.iter().nth(0).unwrap()
     });
 
+    show_cursor(conn, state);
+
     let mut command = Command::new(format!("{}/{}", env!("HELPER_DIR"), state.config.dialog_backend.binary_name()));
     #[cfg(feature = "use-nightly")]
     command.create_pidfd(true);
@@ -759,6 +762,24 @@ fn start_unlock_dialog<'a>(conn: &'a xcb::Connection, state: &State<'a>, trigger
     })
 }
 
+fn show_cursor(conn: &xcb::Connection, state: &State) {
+    for monitor in &state.monitors {
+        conn.send_request(&xfixes::ShowCursor {
+            window: monitor.blanker_window,
+        });
+    }
+}
+
+fn hide_cursor(conn: &xcb::Connection, state: &State) {
+    for monitor in &state.monitors {
+        if let Err(err) = conn.send_and_check_request(&xfixes::HideCursor {
+            window: monitor.blanker_window,
+        }) {
+            warn!("Failed to hide cursor: {}", err);
+        }
+    }
+}
+
 fn blank_screen(conn: &xcb::Connection, state: &mut State) -> anyhow::Result<()> {
     if state.blanker_state >= BlankerState::Blanked {
         return Ok(())
@@ -784,6 +805,8 @@ fn blank_screen(conn: &xcb::Connection, state: &mut State) -> anyhow::Result<()>
         }
     }
 
+    hide_cursor(conn, state);
+
     state.blanker_state = BlankerState::Blanked;
 
     Ok(())
@@ -796,6 +819,8 @@ fn unblank_screen(conn: &xcb::Connection, state: &mut State) -> anyhow::Result<(
 
     info!("Unblanking");
 
+    show_cursor(conn, state);
+
     let mut cookies = Vec::new();
     for monitor in &state.monitors {
         cookies.push(conn.send_request_checked(&x::UnmapWindow {