Am 11.03.16 um 14:00 schrieb Hans Hagen:
My guess is that this is again a single global variable that is being
reused in several places (ie the hpack_filter ???) so that it gets
clobbered depending on what linebreak does
It's a local variable passed to a function by value and not changed in
between so can you check if it's not a latex callback wrapper that is
obscuring it? (What groupcoude is shown in pre and not in post?)
no latex involved :-)
I did set up pre_linebreak_filter to find out the cases where line
breaking happens on the main vertical list (in contrast to being done in
a box, say). Then inside pre_linebreak_filter I run
tex.linebreak
several times with different looseness (you cann see all my reports
coming together :-) ) and record the different results
Then in post_linebreak_filter I replace the generated paragraph node
list with something special (basically to drop it) and to be able to
find out about the para on the contribution list (which I look at in
buildpage_filter). Could probably be done differently but that was the
simplest way to get this working for me.
Anyway, I only want to kill paragraphs if they are on the main vertical
list but let the others through in normal typesetting so in
post_linebreak_filter I go
if groupcode == "" then ...
only that now groupcode is alway empty while in pre_linebreak_filter it
was "vbox" or "adjusted..." etc depending on where I put paragraphs in
my test file
so perhaps calling tex.linebreak kills its value
does this help?
frank
