[PATCH xserver] dix: always send focus event on grab change

[Samuel Thibault]

Focus events are useless when 'from' and 'to' are the same.  But when
this is the result of a (Un)GrabKeyboard request, we should always send
them, including when the window manager had previously used XSetInputFocus
to specify the focus on a window which happens to be now taking a grab.

This is notably needed for window manager using XI to always get keyboard
events even during grabs, so they can determine exactly when grabbing is
active.

Signed-off-by: Samuel Thibault <samuel.thibault at ens-lyon.org>
---
 dix/enterleave.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dix/enterleave.c b/dix/enterleave.c
index 1b341f2de..a2f625bc9 100644
--- a/dix/enterleave.c
+++ b/dix/enterleave.c
@@ -1562,7 +1562,7 @@ DoFocusEvents(DeviceIntPtr pDev, WindowPtr from, WindowPtr to, int mode)
     if (!IsKeyboardDevice(pDev))
         return;
 
-    if (from == to)
+    if (from == to && mode != NotifyGrab && mode != NotifyUngrab)
         return;
 
     CoreFocusEvents(pDev, from, to, mode);
-- 
2.16.3