[PATCH 08/24] Xi: when punting to a new owner, always create TouchEnd events

[Peter Hutterer]

If a touch is pending_finish and we just punted it to the next owner, that
client must receive a TouchEnd event.

If we just punted to the last owner and that owner not a touch grab, we need
to end the touch since this is the last event to be sent, and the client
cannot accept/reject this.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 Xi/exevents.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/Xi/exevents.c b/Xi/exevents.c
index 97fec35..9d999de 100644
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@@ -1143,12 +1143,21 @@ TouchPuntToNextOwner(DeviceIntPtr dev, TouchPointInfoPtr ti,
         TouchEventHistoryReplay(ti, dev, listener->listener);
     }
 
-    /* If we've just removed the last grab and the touch has physically
-     * ended, send a TouchEnd event too and finalise the touch. */
-    if (ti->num_listeners == 1 && ti->num_grabs == 0 && ti->pending_finish) {
+    /* New owner has Begin/Update but not end. If touch is pending_finish,
+     * emulate the TouchEnd now */
+    if (ti->pending_finish) {
         EmitTouchEnd(dev, ti, 0, 0);
-        TouchEndTouch(dev, ti);
-        return;
+
+        /* If the last owner is not a touch grab, finalise the touch, we
+           won't get more correspondence on this.
+         */
+        if (ti->num_listeners == 1 &&
+            (ti->num_grabs == 0 ||
+             listener->grab->grabtype != XI2 ||
+             !xi2mask_isset(listener->grab->xi2mask, dev, XI_TouchBegin))) {
+            TouchEndTouch(dev, ti);
+            return;
+        }
     }
 
     if (accepted_early)
-- 
1.8.1.4