[luatex] strategy for margin kerning and pre_linebreak_filter?
patrick at gundla.ch
Thu Oct 1 11:31:19 CEST 2009
Am 01.10.2009 um 09:52 schrieb Taco Hoekwater:
> Patrick Gundlach wrote:
>> So the problem seems to be that when hyphenating the second
>> the hyphen will stick inside the paragraph. Am I missing something
>> See also tracker item #274
> I would hazard a guess that the inserted hyphen comes from the wrong
> font (the currently active font).
That is true (probably same in tracker #273).
> A solution could be to run lang.hyphenate() inside the filter, and
> only afterwards adjust the font ids?
lang.hyphenate() inserts disc nodes, right? I am pretty sure that the
disc nodes are already in the node list. This is what the node list
looks like on a sample text (--- denotes a disc node, space a glue,
the rest a glyph node) in the pre_linebreak_filter:
Far far away, be---hind the word moun---tains, far from the coun---tries
Vokalia and Con---so---nan---tia, there live the blind texts.
Separated they l
ive in Book---marks---grove right at the coast of the Seman---tics, a
---guage ocean. A small river named Duden flows by their place and
it with the nec---es---sary regelialia. It is a par---adis---e---matic
ry, in which roasted parts of sen---tences fly into your mouth. Even
-powerful Point---ing has no con---trol about the blind texts it is
st un---ortho---graphic life.
I have no idea about TeX internals, but it looks to me as if the
procedure that inserts a hyphen char should take this hyphen char from
the last glyph right before the hyphen char. This would be the "e" in
"be---hind", the first "n" in "moun---tains" etc. Or one should be
able to change the font of the disc node as well (node.font=n where
node.id==7). Otherwise being able to change the font of the glyphs
during the pre-linebreak-filter makes no sense to me.
What do you think?
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