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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. DeliverGrabbedEvents does this already for us, checking first the delivery based on owner_events and then based on the grab mask. AFAICT, the device cannot enter the states FREEZE_BOTH_NEXT_EVENT or FREEZE_NEXT_EVENT that would be handled by DGE in any possible path here. Bonus point - CheckPassiveGrabsOnWindows suddenly becomes a lot lesss complicated. X.Org Bug 25400 <http://bugs.freedesktop.org/show_bug.cgi?id=25400> 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>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage