Re: [PATCH] winex11.drv: Wait for XGrabPointer to succeed on FocusIn events.

[Rémi Bernon]

On 9/18/19 2:13 PM, Rémi Bernon wrote:
>   case NotifyUngrab:
> -
>    wait_for_pointer_ungrab( event->display );
>     keyboard_grabbed = FALSE;
>     retry_grab_clipping_window();
>     return TRUE; /* ignore wm specific NotifyUngrab / NotifyGrab events w.r.t focus */

Note that this line, when using mutter/gnome-shell at least, will make 
it almost impossible to switch to activity view using the Super key.

There's a small delay between the moment mutter releases the keyboard 
grab and sends the event, and the moment gnome-shell itself grabs the 
cursor and keyboard and if the application grabs the cursor in between - 
like it is done here even for a brief moment, gnome-shell is unable to 
get its grab and does not open the view.

In Proton we've specifically added a delay before that to let 
gnome-shell get its grab, but the mutter workarounds are not upstreamed. 
I could add a delay here as well, without the mutter specific check, if 
it seems appropriate.