Re: Reference to a subitem

[Marcin Borkowski <mbork@atos.wmid.amu.edu.pl>]

Dnia Mon, Oct 27, 2008 at 10:56:32AM +0100, Wolfgang Schuster napisał(a):
> 2008/10/25 Marcin Borkowski <mbork@atos.wmid.amu.edu.pl>:
> > Dnia Sat, Oct 25, 2008 at 02:58:24AM +0200, Diego Depaoli napisa&#322;(a):
> >> 2008/10/23 Wolfgang Schuster <schuster.wolfgang@googlemail.com>:
> >> >
> >> > \def\ItemNumber#1%
> >> >  {\expandafter\doItemNumber#1..\relax}
> >> >
> >> > \def\doItemNumber#1.#2.#3\relax
> >> >  {\doifelsenothing{#2}
> >> >    {#1}
> >> >    {#2}}
> >> >
> >> > \definereferenceformat[initem][left=\ItemNumber]
> >> Since I don't speak that language, someone could explain why this code
> >> doesn't work when I put a stopper in subitemization?
> >> The standard dot isn't a stopper itself?
> >
> > This code seems to work (approximately) like this: it expands the "full"
> > reference, which is:
> > <number> <dot> <number> <dot> <something, probably space>
> > and selects "everything from the first dot up to the second one (w/o the
> > dots themselves).  So I consider it to be a bit dirty hack (sorry,
> > Wolfgang;)), in a sense that it is not very flexible.
> 
> It's just hack at user level, a dirty hack would redefine core macros but
> this is what I try to avoid.

OK, sorry - probably we have different semantics of "dirty" (or, more
probably, we're talking about different "levels" of dirtiness).  Here I
meant roughly that this hack is not very flexible.

> > If your stopper is, say ")" (and the second one, say, "]", so you have
> > references in a strange form like "1)2]"), you might want to say
> > something like
> > \def\doItemNumber #1)#2]#3\relax
> > (the space after \doItemNumber is gobbled by TeX, so it might be present
> > here or not, it is a matter of taste only).
> > If you have different stoppers, another approach might be reasonable.  I
> > can see two possibilities:
> > 1. Get to know _where_ ConTeXt really keeps the relevant info about
> > labels; if the info about the values (w/o stoppers) is preserved, we are
> > saved, if not, we've got a problem;
> > 2. so in the latter case we have to (?) use this kind of hacky solution,
> > which might be something like this (assuming that \stopper and \stopperr
> > are the first- and second level stoppers respectively):
> >
> > \edef\sometemporarymacroname{%
> >  \def\noexpand\doItemNumber ##1\stopper ##2\stopperr ##3\relax
> >  {\noexpand\doifelsenothing{##2}
> >    {##1}
> >    {##2}}%
> > }%
> > \sometemporarymacroname
> >
> > (I'm not sure whether the last percentage sign is needed, but a good
> > rule of thumb is to put them everywhere after <closing brace> <newline>,
> > so that the newlines don't get translated into spaces.)
> 
> You don't need the comment sign at the end of the macro in outer level
> but you need it for local definitons in other macros if your're in
> horizontal mode.

Shame on me, being a mathematician and being sooo imprecise:):)

> > I'm not sure whether this works, though, *please* check it and tell me
> > (maybe I'm doing some stupid error, please the TeX gurus correct me if
> > yes).  I hope this is ok, though, because then it my first post to this
> > list containing actually an _answer_ and not a _question_:))).
> 
> Thanks to explain my solution.

You're welcome:).

> Wolfgang

Greets

-- 
Marcin Borkowski (http://mbork.pl)

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