"full screen" windows

[Bj|rn Englund <d4bjorn dtek chalmers se>]

If an application/user wants to have a full screen window, what
window_type / hints should it use?

Full screen window == window covering the whole screen, doesn't have
any decorations and is on top (above any panel/docks/pinnable menu or
at least configurable to be so in the window manager).

In window managers using the motif properties one can set decorations
to none and set the position to 0,0 and size to screen size, but
since there isn't any support for "purely visual descriptions"
in the wm-spec I think there is a bit of a problem.

None of the _NET_WM_WINDOW_TYPE seems to be the right one to use (?)

Or would it be acceptable to set the window_type to dock?
And this might not mean that there are no decorations.

What is the best/most portable way of doing this?
Is it possible with the current wm-spec.

/Björn