[PATCH weston v2 2/2] libinput: Only forward first and last press and release for a key

[Jonas Ådahl]

Keyboard key events will be received from a device where a key has
been pressed, even though an equivalent key has been pressed (same
key code) on a device connected to the same seat. notify_key()
expects to only be called as if there was only one keyboard device
associated with the given seat, so to achieve this, ignore every event
where forwarding it would result in multiple 'pressed' or 'released'
notifications.

Signed-off-by: Jonas Ådahl <jadahl at gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer at who-t.net>
Reviewed-by: Daniel Stone <daniels at collabora.com>
---

Changed since v1:

New commit message subject


 src/libinput-device.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/libinput-device.c b/src/libinput-device.c
index 5c5b9b9..567e5ea 100644
--- a/src/libinput-device.c
+++ b/src/libinput-device.c
@@ -59,6 +59,17 @@ handle_keyboard_key(struct libinput_device *libinput_device,
 {
 	struct evdev_device *device =
 		libinput_device_get_user_data(libinput_device);
+	int key_state =
+		libinput_event_keyboard_get_key_state(keyboard_event);
+	int seat_key_count =
+		libinput_event_keyboard_get_seat_key_count(keyboard_event);
+
+	/* Ignore key events that are not seat wide state changes. */
+	if ((key_state == LIBINPUT_KEY_STATE_PRESSED &&
+	     seat_key_count != 1) ||
+	    (key_state == LIBINPUT_KEY_STATE_RELEASED &&
+	     seat_key_count != 0))
+		return;
 
 	notify_key(device->seat,
 		   libinput_event_keyboard_get_time(keyboard_event),
-- 
2.1.0