Hi all,
In French typography, when two quotations are embedded, every line of
the inner one should start with a quote character («) followed by a kern
(there are variants, but let's stick to this one).
I am trying to implement this in LuaTeX using the following trick inside
inner quotations:
-- When a line break occurs on a disc node, it is easy to add any hlist
(« + kern in my case) at the beginning of the next line using the "post"
field of the disc node; this part works fine.
-- As most line breaks occur on a glue node, I try to replace any glue
node by a disc node with
"pre" = empty,
"post" = "« + kern",
"replace" = the replaced glue.
When I add the Lua code implementing this replacement (glue -> disc) to
pre_linebreak_filter, and I get the error message:
"! This can't happen (add_disc_widths)."
Thanks in advance for comments and/or ideas for a workaround.
Best wishes,
--
Daniel Flipo
