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fix: skip non-grabbed evdev on X11, fall through to X11 keymap capture

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This commit is contained in:
Khoa Vo 2026-07-04 16:41:25 +07:00
parent 5f0f059139
commit aa8a0624fc
1 changed files with 26 additions and 27 deletions
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55
daemon/src/main.rs
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@ -1309,12 +1309,12 @@ fn run_with_evdev(
_engine_enabled: Arc<AtomicBool>,
display: display::DisplayServer,
) -> Result<(), Box<dyn std::error::Error>> {
let mut injector = create_injector(display)?;
let injector = create_injector(display)?;
// Use the first device for grab (only one device can be grabbed at a time)
let primary_idx = 0usize;
let mut grabbed = if daemon.grab_enabled && !devices.is_empty() {
match devices[primary_idx].0.grab() {
let mut grabbed = match devices.first() {
Some(_) if daemon.grab_enabled => match devices[primary_idx].0.grab() {
Ok(()) => {
log_info("[vietc] Keyboard grabbed — race condition eliminated");
true
@ -1324,27 +1324,28 @@ fn run_with_evdev(
"[vietc] Could not grab keyboard: {} (run as root for grab)",
e
));
log_info("[vietc] Falling back to non-grabbing mode (may have race)");
false
}
}
} else {
if !daemon.grab_enabled {
log_info("[vietc] Keyboard grab disabled (config grab = false)");
log_info("[vietc] Set grab = true in vietc.toml to enable (needs root)");
}
false
};
// Non-grabbed on X11: use XTest injection for fast, synchronous correction
if !grabbed {
// On X11, fall through to keymap capture instead of non-grabbed evdev
#[cfg(feature = "x11")]
if display != display::DisplayServer::Wayland {
if let Ok(x11_inj) = vietc_protocol::x11_inject::X11Injector::new() {
injector = Box::new(x11_inj);
log_info("[vietc] Non-grabbed: using X11 injection (faster than uinput)");
log_info("[vietc] X11 detected — trying X11 keymap capture");
return Ok(());
}
log_info("[vietc] Falling back to non-grabbing evdev mode (may have race)");
false
}
},
_ => {
log_info("[vietc] No keyboard devices available for grab");
false
}
};
// On X11 without evdev grab, use keymap capture instead of non-grabbed evdev.
// Reason: XTest backspace events feed back into evdev, corrupting the engine.
#[cfg(feature = "x11")]
if !grabbed && display != display::DisplayServer::Wayland {
log_info("[vietc] X11 without evdev grab — switching to X11 keymap capture");
return Ok(());
}
let mut consumed_keys: HashSet<u16> = HashSet::new();
@ -1379,20 +1380,18 @@ fn run_with_evdev(
}
if grabbed && idle_polls >= 3 && last_event_time.elapsed() > std::time::Duration::from_millis(200) {
#[cfg(feature = "x11")]
if display != display::DisplayServer::Wayland {
log_info("[vietc] No events via grab on X11 — exiting evdev for X11 keymap capture");
let _ = devices[primary_idx].0.ungrab();
return Ok(());
}
log_info(
"[vietc] No events received via grab — releasing grab, continuing in non-grabbed evdev mode",
);
let _ = devices[primary_idx].0.ungrab();
grabbed = false;
log_info("[vietc] Non-grabbed mode: polling all evdev devices for keystrokes");
// Switch to XTest injection for fast synchronous non-grabbed correction
#[cfg(feature = "x11")]
if display != display::DisplayServer::Wayland {
if let Ok(x11_inj) = vietc_protocol::x11_inject::X11Injector::new() {
injector = Box::new(x11_inj);
log_info("[vietc] Non-grabbed: using X11 injection (faster than uinput)");
}
}
continue;
}