[texhax] in-section references

[martin f krafft]

Replying to the list...

also sprach Donald Arseneau <asnd at triumf.ca> [2007.10.01.0009 +0100]:
> > So you mean \edef\curpart{\thepart}?
> 
> Yes, but that is not guaranteed to give the same result as
> \let\curpart\thepart, which is another possibility for
> what you meant.  (Also, you must use \protected at edef in
> LaTeX for safety.)

Hm, if only I had a way of reading about this stuff. LaTeX is one
big mystery to me...

> but your best test is to insert 
> \show\curref
> \show\refpart
> and note the differences.

If I do that, I just get a runaway argument error. But I can use
standard "printf" debugging with \typeout, read on...

> >   \def\curref{#2}%
> 
> I'm not sure what you are giving as #2,...

\rrefx{section}{\ref{some-term}}{page~\pageref{some-term}}

So
  #1 section 
  #2 3.1.1
  #3 page~42

The theory is that I find out whether #2 matches the current
chapter, and the way to do that is basically:

  if #2 == \thechapter or ... or #2 == \thesubsubsection
  then
    print 'page~42'
  else
    print section~3.1.1
  fi

Now here is the function again, this time with \hbox{} (which Tom
originally included), which appears to be necessary as \ref{}
outputs it when it expands the reference:

\newcommand{\rrefx}[3]{%
  \protected at edef\curchapter{\thechapter\hbox{}}%
  \protected at edef\cursection{\thesection\hbox{}}%
  \protected at edef\cursubsection{\thesubsection\hbox{}}%
  \protected at edef\cursubsubsection{\thesubsubsection\hbox{}}%
  \protected at edef\curref{#2}%
  \def\refsame{#3}%
  \def\refother{#1~#2}%
  \ifx\curchapter\curref\refsame%
    \else\ifx\cursection\curref\refsame%
      \else\ifx\cursubsection\curref\refsame%
        \else\ifx\cursubsubsection\curref\refsame%
          \else\refother%
        \fi%
      \fi%
    \fi%
  \fi%
}%

And I finally got it working *iff* I disable the hyperref package.
If it's enabled, I guess \ref{} generates something else and the
match fails. In fact, typeout outputs:

  DEBUG: \ref {section:deb-term-nonfree}A\hbox {}A.2\hbox {}A.2.0\hbox {}A.2.0.0\hbox {}

so the \ref is substituted later, which breaks my approach. Am
I missing something? Is there anything I can do to fix it and make
it work with hyperref?

-- 
martin;              (greetings from the heart of the sun.)
  \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net at madduck
 
"in diving to the bottom of pleasure
 we bring up more gravel than pearls."
                                                   -- honoré de balzac
 
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