Scratchpad vs. access focus history

Hello,

I just started using Ion3 (20070318), and playing with LUA to make it
suit my needs. Yes, I've read the "Reporting bugs" FAQ and was able to
reach #6 :)

There's one thing that annoys me : the ioncore.goto_previous function
does not ignore scratchpads, and this is what happens :
  - I toggle a scratchpad display on, then off
  - I run ioncore.goto_previous() a first time : this toggles this
    scratchpad display on
  - I run ioncore.goto_previous() a second time : nothing happens

(NB : I'm using the named_scratchpad contrib. Anyway, what I'm
describing above happens with the standard *scratchpad* as well as
with my own named scratchpads.)

Is this the intended behavior ?

If yes, I want to write in LUA a function that would act just as
ioncore_goto_previous, but would ignore the scratchpads from the focus
history list. But I could not find how to access it in LUA. Is it made
public to LUA ? Or is there a way to access a WRegion's active_next ?
Or am I bound to do it in C ? I've seen the wcirculate contrib seems
to manage its own focus history list, using the appropriate hooks, so
I guess there is no other way, but I hope I'm wrong...

Ciao,
-- 
  intrigeri <[email protected]>
  | gnupg key @ http://intrigeri.boum.org/intrigeri.asc
  | Then we'll come from the shadows.