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

Hans Hagen writes:

David Kastrup wrote:

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Hans Hagen writes:

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David Kastrup wrote:

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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. -- David Kastrup