Le 11/10/2011 02:13, Frank Kuehnel a écrit :
I recently started playing with LuaTex to see whether it is suitable for
addressing the following problem:
For every math formula in a document I'd like to generate an equivalent content
MathML expression and write
it out into a separate file. Content MathML doesn't require any style elements.
I thought the mlist_hlist callback function may be suitable for this task.
However, I couldn't find any suitable
examples on how to use the mlist_to_hlist callback. I also looked briefly into the code
base: "texmath.w".
Here, it seems like that the after_math function could neatly implement another
mlist related callback, right after
the call to the fin_mlist routine (line 2249). The proposed callback function
would take an mlist as the argument and return
either the same mlist or a modified mlist, which would then be processed into
an hlist.
I just put out this idea for discussion to see whether somebody else has a
better idea?
You can do that directly in mlist_to_hlist, which should host a function
that does what is described in Appendix G of the TeXbook -- so, no small
task, but fortunately the function already exists in LuaTeX:
node.mlist_to_hlist. So you can do whatever you want to your mlist and
then pass it to node.mlist_to_hlist and return the result.
I hope this answer your question. I'll admit I didn't see the necessity
of a new callback here.
Best,
Paul
