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Date:      Fri, 4 Feb 2011 16:57:23 GMT
From:      Brian Feldman <green@FreeBSD.org>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   ports/154510: xorg servers have Motif-crippling bug
Message-ID:  <201102041657.p14GvNN5076793@red.freebsd.org>
Resent-Message-ID: <201102041700.p14H0B3m062439@freefall.freebsd.org>

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>Number:         154510
>Category:       ports
>Synopsis:       xorg servers have Motif-crippling bug
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Fri Feb 04 17:00:11 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Brian Feldman
>Release:        
>Organization:
>Environment:
>Description:
This has been driving me crazy for a long time and I tracked it down to a bug that was fixed in an older xorg-server release but not the later releases (it did eventually get merged forward, though.)  All Motif applications have unusable right-click menus because the cursor stays trapped in them until you kill the program entirely.

I confirmed this makes Motif usable for right-click menus again.
>How-To-Repeat:
Right click in a Motif application that brings up a menu; cursor is trapped.
>Fix:
patch from the Xorg project.  anything else that builds an xorg-server needs it, too, Xnest, etc.

Patch attached with submission follows:

>From 873ef3430e92b0756c0dbe5033f6aec38a20d6ad Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Wed, 16 Dec 2009 13:43:22 +1000
Subject: [PATCH] dix: if owner-events is true for passive grabs, add the window mask (#25400)

A client requesting a GrabModeSync button grab, owner-events true, with only
the ButtonRelease mask set would never receive the press event even if the
grab window had the ButtonPress mask set.

The protocol requires that if owner-events is true, then the delivery mask
is the combination of the grab mask + the window event mask.

X.Org Bug 25400 <http://bugs.freedesktop.org/show_bug.cgi?id=25400>;

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
 dix/events.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/dix/events.c b/dix/events.c
index 7e0867c..12b12a8 100644
--- dix/events.c
+++ dix/events.c
@@ -3590,6 +3590,8 @@ CheckPassiveGrabsOnWindow(
                 xE = &core;
                 count = 1;
                 mask = grab->eventMask;
+                if (grab->ownerEvents)
+                    mask |= pWin->eventMask;
             } else if (match & XI2_MATCH)
             {
                 rc = EventToXI2((InternalEvent*)event, &xE);
@@ -3611,6 +3613,24 @@ CheckPassiveGrabsOnWindow(
                     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
             {
                 rc = EventToXI((InternalEvent*)event, &xE, &count);
@@ -3622,6 +3642,22 @@ CheckPassiveGrabsOnWindow(
                     continue;
                 }
                 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;
+                    }
+                }
             }
 
 	    (*grabinfo->ActivateGrab)(device, grab, currentTime, TRUE);
-- 
1.6.5.2



>Release-Note:
>Audit-Trail:
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