Re: [Dev-luatex] A few idle questions...

7 May 2008


      David Kastrup wrote:
...
Hans Hagen  writes:
...
David Kastrup wrote:
...
Hans Hagen  writes:
...
David Kastrup wrote:
...
Yes, that is the kind of thing I had been thinking of.  Another is
output routine programming: a function
get_more_main_vertical_list_material_from_TeX would be quite handy in
some applications, and yielding to TeX until the next pass would seem to
make for some very straightforward and understandable programming.
you can already use a callback to collect material that is added to
the vertical lists
I don't understand.  What callback, and where is the material supposed
to originate?
vpack_filter
buildpage_filter
at that point you can save the list passed to the function and return
nothing
I am afraid that is not useful for what I had in mind, since what I had
in mind requires actual typesetting, so I need to inject material into
TeX (unhboxing into vertical boxes, for example) and take a look at the
results.  I can reinject material into TeX while being caught in the
output routine, but the callback would not seem like a suitable context
for that.  Namely: I can't finish the job using just Lua.
I suppose I have to do my own experiments here, I just wanted to hear
about existing experiences and/or approaches.
as a variant on coroutines you can just print to tex things like 
tex.sprint("\\directlua{nextstage()}" intermixed with other tex code

this works ok but is not always beautiful but for the moment it is the 
only way to go

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