[Xcb] Prevent/Redirect Mapping of foreign Application windows

[Jochen.Baier at stud.uni-karlsruhe.de]

hi,

I wonder is there a way to intercept the mapping of foreign windows (not in the
same program, program A should prevent mapping of the main window from program B).

It would be possible if I can fake the root window. The main window should than
use the faked root window as parent. (and redirect mapping with the MapRequest
event).

Is it possible to change the root window the program will use ? Maybe with same
environment variable similar like "DISPLAY" ? Or do I need to handle with
LD_PRELOAD to override the RootWindow() function ?


all hints are welcome

regards jochen