Revert "dix: use the event mask of the grab for TryClientEvents."

Behaviour of earlier X servers was to deliver the ButtonPress event
unconditionally, regardless of the actual event mask being set. Thus, a
GrabButton event will always deliver the button press event, a GrabKey
always the key press event, etc. Same goes for XI and XI2.

Reproducible with a simple client requesting a button grab in the form of:
    XGrabButton(dpy, AnyButton, AnyModifier, win, True, ButtonReleaseMask,
                GrabModeAsync, GrabModeAsync, None, None);

On servers before MPX/XI2, the client will receive a button press and
release event. On current servers, the client receives only the release.
Clients that expect the press event to be delivered unconditionally may
leave the user with a stuck grab.

XTS test results for XGrabButton are identical with and without this patch.

This reverts commit 48585bd1e3e98db0f3df1ecc68022510216e00cc.

Conflicts:

	dix/events.c

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 2 insertions, 50 deletions

diff --git a/dix/events.c b/dix/events.c
index ae9847c93..e1c3d0a02 100644
--- a/dix/events.c
+++ b/dix/events.c
@@ -3422,3 +3422,2 @@ CheckPassiveGrabsOnWindow(
 	XkbSrvInfoPtr	xkbi = NULL;
-	Mask		mask = 0;
 
@@ -3537,5 +3536,2 @@ CheckPassiveGrabsOnWindow(
                 count = 1;
-                mask = grab->eventMask;
-                if (grab->ownerEvents)
-                    mask |= pWin->eventMask;
             } else if (match & XI2_MATCH)
@@ -3551,30 +3547,2 @@ CheckPassiveGrabsOnWindow(
                 count = 1;
-
-                /* FIXME: EventToXI2 returns NULL for enter events, so
-                 * dereferencing the event is bad. Internal event types are
-                 * aligned with core events, so the else clause is valid.
-                 * long-term we should use internal events for enter/focus
-                 * as well */
-                if (xE)
-                    mask = grab->xi2mask[device->id][((xGenericEvent*)xE)->evtype/8];
-                else if (event->type == XI_Enter || event->type == XI_FocusIn)
-                    mask = grab->xi2mask[device->id][event->type/8];
-
-                if (grab->ownerEvents && wOtherInputMasks(grab->window))
-                {
-                    InputClientsPtr icp =
-                        wOtherInputMasks(grab->window)->inputClients;
-
-                    while(icp)
-                    {
-                        if (rClient(icp) == rClient(grab))
-                        {
-                            int evtype = (xE) ? ((xGenericEvent*)xE)->evtype : event->type;
-                            mask |= icp->xi2mask[device->id][evtype/8];
-                            break;
-                        }
-
-                        icp = icp->next;
-                    }
-                }
             } else
@@ -3589,19 +3557,2 @@ CheckPassiveGrabsOnWindow(
                 }
-                mask = grab->eventMask;
-                if (grab->ownerEvents && wOtherInputMasks(grab->window))
-                {
-                    InputClientsPtr icp =
-                        wOtherInputMasks(grab->window)->inputClients;
-
-                    while(icp)
-                    {
-                        if (rClient(icp) == rClient(grab))
-                        {
-                            mask |= icp->mask[device->id];
-                            break;
-                        }
-
-                        icp = icp->next;
-                    }
-                }
             }
@@ -3614,3 +3565,4 @@ CheckPassiveGrabsOnWindow(
 
-                TryClientEvents(rClient(grab), device, xE, count, mask,
+                TryClientEvents(rClient(grab), device, xE, count,
+                                       GetEventFilter(device, xE),
                                        GetEventFilter(device, xE), grab);