feat: notify active panes when terminal is unfocused

1 files changed, 19 insertions, 0 deletions

diff --git a/src/raw_input.rs b/src/raw_input.rs
index a98cf25d..c2a412b2 100644
--- a/src/raw_input.rs
+++ b/src/raw_input.rs
@@ -125,6 +125,8 @@ pub enum RawInputEvent {
     Key(TerminalKey),
     Paste(String),
     Mouse(MouseEvent),
+    OuterFocusGained,
+    OuterFocusLost,
     HostDefaultColor {
         kind: DefaultColorKind,
         color: RgbColor,
@@ -297,6 +299,12 @@ fn extract_one_event(buffer: &[u8]) -> Option<(RawInputEvent, usize)> {
             return Some((RawInputEvent::HostDefaultColor { kind, color }, seq_len));
         }
 
+        match seq {
+            "\x1b[I" => return Some((RawInputEvent::OuterFocusGained, seq_len)),
+            "\x1b[O" => return Some((RawInputEvent::OuterFocusLost, seq_len)),
+            _ => {}
+        }
+
         if let Some(mouse) = parse_sgr_mouse(seq) {
             return Some((RawInputEvent::Mouse(mouse), seq_len));
         }
@@ -604,6 +612,17 @@ mod tests {
     }
 
     #[test]
+    fn parses_outer_focus_events() {
+        let (event, consumed) = extract_one_event(b"\x1b[I").unwrap();
+        assert_eq!(consumed, 3);
+        assert!(matches!(event, RawInputEvent::OuterFocusGained));
+
+        let (event, consumed) = extract_one_event(b"\x1b[O").unwrap();
+        assert_eq!(consumed, 3);
+        assert!(matches!(event, RawInputEvent::OuterFocusLost));
+    }
+
+    #[test]
     fn parses_xterm_alt_up_arrow() {
         let (RawInputEvent::Key(key), consumed) = extract_one_event(b"\x1b[1;3A").unwrap() else {
             panic!("expected key");