fix: force redraw on terminal focus gain

1 files changed, 15 insertions, 0 deletions

diff --git a/src/raw_input.rs b/src/raw_input.rs
index 3ebd9554..28a2e561 100644
--- a/src/raw_input.rs
+++ b/src/raw_input.rs
@@ -128,6 +128,12 @@ pub enum RawInputEvent {
     Unsupported,
 }
 
+pub(crate) fn events_require_host_surface_redraw(events: &[RawInputEvent]) -> bool {
+    events
+        .iter()
+        .any(|event| matches!(event, RawInputEvent::OuterFocusGained))
+}
+
 pub fn spawn_input_reader() -> mpsc::Receiver<RawInputEvent> {
     let (tx, rx) = mpsc::channel(256);
 
@@ -649,6 +655,15 @@ mod tests {
     }
 
     #[test]
+    fn outer_focus_gained_requests_host_surface_redraw() {
+        let events = parse_raw_input_bytes_sync(b"\x1b[I");
+        assert!(events_require_host_surface_redraw(&events));
+
+        let events = parse_raw_input_bytes_sync(b"\x1b[O");
+        assert!(!events_require_host_surface_redraw(&events));
+    }
+
+    #[test]
     fn parses_xterm_alt_up_arrow() {
         let (RawInputEvent::Key(key), consumed) = extract_one_event(b"\x1b[1;3A").unwrap() else {
             panic!("expected key");