Skip event posting for empty slots.

ABS_MT_SLOT comes before any other events. The following order of events
is common for protocol B devices (and mtdev):

...
EV_SYN
ABS_MT_SLOT        → posting here means we miss on the position information
ABS_MT_POSITION_X
ABS_MT_POSITION_Y
ABS_MT_SLOT
ABS_MT_POSITION_X
ABS_MT_POSITION_Y
EV_SYN

Store the stot state as SLOT_EMPTY after posting an event (i.e. EV_SYN and
ABS_MT_SLOT) and then don't post until the next slot/syn event.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/evdev.h b/src/evdev.h
index 165aea4..27e404c 100644
--- a/src/evdev.h
+++ b/src/evdev.h
@@ -103,6 +103,7 @@ enum fkeymode {
 enum SlotState {
     SLOTSTATE_OPEN = 8,
     SLOTSTATE_CLOSE,
+    SLOTSTATE_UPDATE,
     SLOTSTATE_EMPTY,
 };