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When activating an explicit grab, update owning listener

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Pointer passive grabs may be changed by the grabbing client. This allows
for a selecting client to change an implicit grab to an active grab,
which is the mechanism used for pop-up windows like application menus.

We need to do the same thing with touches. If the grabbing client is the
owner of a touch sequence, change the listener record to reflect the new
grab. If the grabbing client is not the owner, nothing changes for the
touch.

Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit 2efbed23c2)
This commit is contained in:
Chase Douglas 2012-04-17 08:39:38 -07:00 • committed by Peter Hutterer
parent 8ccc6ad637
commit 7be71cb089
1 changed files with 33 additions and 0 deletions
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33
dix/events.c
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@ -1407,6 +1407,38 @@ ReattachToOldMaster(DeviceIntPtr dev)
}
}
/**
* Update touch records when an explicit grab is activated. Any touches owned by
* the grabbing client are updated so the listener state reflects the new grab.
*/
static void
UpdateTouchesForGrab(DeviceIntPtr mouse)
{
int i;
if (!mouse->touch || mouse->deviceGrab.fromPassiveGrab)
return;
for (i = 0; i < mouse->touch->num_touches; i++) {
TouchPointInfoPtr ti = mouse->touch->touches + i;
GrabPtr grab = mouse->deviceGrab.grab;
if (ti->active &&
CLIENT_BITS(ti->listeners[0].listener) == grab->resource) {
ti->listeners[0].listener = grab->resource;
ti->listeners[0].level = grab->grabtype;
ti->listeners[0].state = LISTENER_IS_OWNER;
ti->listeners[0].window = grab->window;
if (grab->grabtype == CORE || grab->grabtype == XI ||
!xi2mask_isset(grab->xi2mask, mouse, XI_TouchBegin))
ti->listeners[0].type = LISTENER_POINTER_GRAB;
else
ti->listeners[0].type = LISTENER_GRAB;
}
}
}
/**
* Activate a pointer grab on the given device. A pointer grab will cause all
* core pointer events of this device to be delivered to the grabbing client only.
@ -1456,6 +1488,7 @@ ActivatePointerGrab(DeviceIntPtr mouse, GrabPtr grab,
grabinfo->fromPassiveGrab = isPassive;
grabinfo->implicitGrab = autoGrab & ImplicitGrabMask;
PostNewCursor(mouse);
UpdateTouchesForGrab(mouse);
CheckGrabForSyncs(mouse, (Bool) grab->pointerMode,
(Bool) grab->keyboardMode);
}