[luatex] Interfere with page breaking to balance pages
mailing_list at arcor.de
Wed Oct 17 15:44:58 CEST 2012
Am 16.10.2012 18:23, schrieb Patrick Bergner:
> Using "atbegshi" I was unable to retrieve the page content as it is only
> accessible using \AtBeginShipoutBox (...and I don't know how to use it
> from the Lua side).
For me the following works
texio.write_nl('box = ' .. box)
But I'm not a TeX expert and I don't know when that might go wrong.
> The package does provide a \AtBeginShipoutDiscard command to discard
> shipout though (...although, again, I don't know how to use it from
> the Lua side).
> A more Lua-esque solution (i.e., pure Lua with a hook for
> luatexbase.add_to_callback) would still be preferred.
I, too, think a pre-shipout callback is missing to access a completely
rendered page. Unsurprisingly, variable tex.lists.page_head (see sec.
'Special lists' in luatexref-t.pdf) as well as tex.box are nil in
buildpage_filter when extrainfo == 'after_output'. And when extrainfo
isn't 'after_output', you never know if the page has already been
completed. Am I missing something?
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