[PATCH 2/5] Accept touch sequence for pointer listener after second event delivery

[Chase Douglas]

This is a bit of unimplemented code for touchscreen pointer emulation. A
pointer grabbing client currently never accepts the touch sequence. The
sequence must be accepted once any touch-derived event is irrevocably
delivered to a client.

The first pointer event, derived from a touch begin event, may be caught
in a sync grab and then replayed. This is essentially a revocable
delivery of an event. Thus, we must wait till a non-begin event is
delivered.

Signed-off-by: Chase Douglas <chase.douglas at canonical.com>
---
 Xi/exevents.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/Xi/exevents.c b/Xi/exevents.c
index c05c226..50ed21b 100644
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@@ -1459,6 +1459,11 @@ DeliverTouchEmulatedEvent(DeviceIntPtr dev, TouchPointInfoPtr ti,
             if (!deliveries)
                 DeliverOneGrabbedEvent(ptrev, dev, grab->grabtype);
 
+            /* We must accept the touch sequence once a pointer listener has
+             * received one event past ButtonPress. */
+            if (deliveries && ev->any.type != ET_TouchBegin)
+                TouchListenerAcceptReject(dev, ti, 0, XIAcceptTouch);
+
             if (ev->any.type == ET_TouchEnd &&
                 !dev->button->buttonsDown &&
                 dev->deviceGrab.fromPassiveGrab && GrabIsPointerGrab(grab)) {
-- 
1.7.9.1