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Xi: Use current device active grab to deliver touch events if any 

When Retrieving touch delivery data we need to check if we have an active
grab on such device, and in that case use it to delivery events.
If we don't do this, when rejecting the touch events in DeactivatePointerGrab,
we will end-up in creating an implicit grab that will change the device
deviceGrab's state, causing a recursion during TouchEndTouch.

Fixes #7

https://bugs.freedesktop.org/show_bug.cgi?id=96536
This commit is contained in:
Marco Trevisan (Treviño) 2018-10-26 19:52:49 +02:00 committed by Peter Hutterer
parent 700505144f
commit 35e5a76cc1
1 changed files with 8 additions and 13 deletions
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21
Xi/exevents.c
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@ -1293,14 +1293,21 @@ RetrieveTouchDeliveryData(DeviceIntPtr dev, TouchPointInfoPtr ti,
int rc;
InputClients *iclients = NULL;
*mask = NULL;
*grab = NULL;
if (listener->type == LISTENER_GRAB ||
listener->type == LISTENER_POINTER_GRAB) {
*grab = listener->grab;
BUG_RETURN_VAL(!*grab, FALSE);
}
else if (ti->emulate_pointer && dev->deviceGrab.grab &&
!dev->deviceGrab.fromPassiveGrab) {
/* There may be an active pointer grab on the device */
*grab = dev->deviceGrab.grab;
}
if (*grab) {
*client = rClient(*grab);
*win = (*grab)->window;
*mask = (*grab)->xi2mask;
@ -1357,8 +1364,6 @@ RetrieveTouchDeliveryData(DeviceIntPtr dev, TouchPointInfoPtr ti,
/* if owner selected, oclients is NULL */
*client = oclients ? rClient(oclients) : wClient(*win);
}
*grab = NULL;
}
return TRUE;
@ -1498,16 +1503,6 @@ DeliverEmulatedMotionEvent(DeviceIntPtr dev, TouchPointInfoPtr ti,
&mask))
return;
/* There may be a pointer grab on the device */
if (!grab) {
grab = dev->deviceGrab.grab;
if (grab) {
win = grab->window;
mask = grab->xi2mask;
client = rClient(grab);
}
}
DeliverTouchEmulatedEvent(dev, ti, (InternalEvent*)&motion, &ti->listeners[0], client,
win, grab, mask);
}