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Date:         Tue, 9 Jul 1996 11:17:55 +0200
From: Werner Lemberg <a7971428@UNET.UNIVIE.AC.AT>
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Subject:      Re: latex/2192: \DeclareFont{Family,Shape} behave unexpectedly
Status: R

On Mon, 8 Jul 1996, Martin Schroeder wrote:

> > > Maybe it's the wrong way now. But can you offer any other solution? I need
> > > this feature, and if you introduce some new features I will immediately
> > > update. Theoretically I could check whether \selectfont has been modified by
> > > any other package...
>
> >you should do that definitely for all internal commands you modify, it
> >will help you to maintain your stuff and avoids some of the hard to find bugs
>
> May I suggest a look at
>         macros/latex/contrib/supported/everysel
> this contains my package
> ...
> %  \section{Introduction}
> %  ^^A
> %  This package provides the hooks \cs{EverySelectfont} and
> %  \cs{AtNextSelectfont} whose arguments are executed just after
> %  \LaTeX{} has loaded a new font using \cs{selectfont} (which means
> %  that it will be executed after \emph{every} font loaded via NFSS).
> %
>
> Does this solve some of your problems? :-)
>

Not really.

Be careful if you say `loading' a font. What you mean is `switching' to a
font. This is a great difference: e.g. the loading-settings in
\DeclareFontShape are executed only _once_ when you really load the font
into TeX's memory. They are not executed afterwards if you switch to this
font again.

Your interface will also fail for nested fonts, as Frank explained to me.

\foo{\bar{...}...}
              ^^^

After leaving the group \selectfont will not be called...

Such a situation cannot happen for my CJK package since I have to select a
new (only in very few cases identical) font for _each_ character.


    Werner