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Change enter/leave semantics for events with detail Notify{Nonlinear}Virtual.

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Core enter/leave events with detail Notify{Ancestor|Inferior|Nonlinear} are
only sent for the first/last pointer to enter/leave. Events with detail
Notify{Nonlinear}Virtual are sent at all times, but not to those windows that
currently have one or more pointers inside their boundaries.
This commit is contained in:
Peter Hutterer 2007-04-17 11:17:04 +09:30
parent ea27b09d3a
commit 451d5464b4
1 changed files with 45 additions and 14 deletions
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59
dix/events.c
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@ -281,7 +281,7 @@ static void DoEnterLeaveEvents(
WindowPtr fromWin,
WindowPtr toWin,
int mode
);
);
static WindowPtr XYToWindow(
int x,
@ -3453,6 +3453,7 @@ EnterLeaveEvent(
GrabPtr devgrab = mouse->deviceGrab.grab;
Mask mask;
long* inWindow; /* no of sprites inside pWin */
Bool sendevent = FALSE;
deviceEnterNotify *devEnterLeave;
int mskidx;
@ -3503,21 +3504,51 @@ EnterLeaveEvent(
inWindow = &pWin->devPrivates[EnterLeavePrivatesIndex].val;
(type == EnterNotify) ? (*inWindow)++ : (*inWindow)--;
/*
* Sending multiple core enter/leave events to the same window confuse the
* client.
* We can send multiple events that have detail NotifyVirtual or
* NotifyNonlinearVirtual however.
*
* For standard events (NotifyAncestor, NotifyInferior, NotifyNonlinear)
* we only send an enter event for the first pointer to enter. A leave
* event is sent for the last pointer to leave.
*
* For events with Virtual detail, we send them only to a window that does
* not have a pointer inside.
*
* For a window tree in the form of
*
* A -> Bp -> C -> D
* \ (where B and E have pointers)
* -> Ep
*
* If the pointer moves from E into D, a LeaveNotify is sent to E, an
* EnterNotify is sent to D, an EnterNotify with detail
* NotifyNonlinearVirtual to C and nothing to B.
*/
if (mask & filters[type])
if (event.u.u.detail != NotifyVirtual &&
event.u.u.detail != NotifyNonlinearVirtual)
{
/* only send core events for the first device to enter and the last
one to leave */
if ((*inWindow) == (LeaveNotify - type))
{
if (grab)
(void)TryClientEvents(rClient(grab), &event, 1, mask,
filters[type], grab);
else
(void)DeliverEventsToWindow(mouse, pWin, &event, 1, filters[type],
NullGrab, 0);
}
(type == EnterNotify) ? (*inWindow)++ : (*inWindow)--;
if (((*inWindow) == (LeaveNotify - type)))
sendevent = TRUE;
} else
{
if (!(*inWindow))
sendevent = TRUE;
}
if ((mask & filters[type]) && sendevent)
{
if (grab)
(void)TryClientEvents(rClient(grab), &event, 1, mask,
filters[type], grab);
else
(void)DeliverEventsToWindow(mouse, pWin, &event, 1, filters[type],
NullGrab, 0);
}
devEnterLeave = (deviceEnterNotify*)&event;