[OS X TeX] PDF Sync and different fonts/encodings?
Morten Høgholm
morten.hoegholm at gmail.com
Mon Feb 6 13:54:35 EST 2006
On Mon, 06 Feb 2006 10:34:46 +0100, Frank STENGEL <fstengel at mac.com> wrote:
> This said, there does not seem to be any way of reversing this patching
> of \@@par (something in the line of a \let\@@par\PDFSYNC at par when one
> wants to revert to the state before using pdfsync). In the same chain of
> ideas, the patching of \everymath, \everyhbox, erases anything that was
> in these token lists before. Why not have something like
>
> \expandafter\expandafter\everymath\expandafter{\pdfSyncStyff\the
> \everymath}
>
> when patching \everymath? (sorry for the \expandafters, but they seem
> necessary...)
Careful, the above will most likely lead to an error like
! TeX capacity exceeded, sorry [input stack size=5000].
What we want here is to insert \@PDFSYNC unexpanded into \everymath while
making sure we do not get an infinite loop with \everymath calling itself.
Hence the above code should be
\expandafter\everymath\expandafter{\expandafter\@PDFSYNC\the\everymath}
\begin{texnote}
Token registers like \everymath take an optional <filler text> which may
appear before the mandatory {. Hence you can cheat and omit the first
\expandafter and simply write
\everymath\expandafter{\expandafter\@PDFSYNC\the\everymath}
Not of much use here but nice if you for instance wanted to make a global
assignment to \everymath, where \@PDFSYNC was expanded once (or maybe even
twice).
Yes, TeX's syntax rules are plenty and sometimes a little weird... :-)
\end{texnote}
--
Morten
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