Re: rel-0-9; No previews with version 0.9

Frank K.=BCster <[email protected]> writes:

> emacs -q --no-site-file
> M-x toggle-debug-on-error RET
> M-x load-library RET tex-site RET
> M-x load-library RET preview-latex RET
> C-x C-f latex/text/auctex/preview-gs-mini.tex
>
> ,----
> | \documentclass{book}
> |=20
> | \usepackage[textmath]{preview}
> |=20
> |=20
> | \begin{document}
> |=20
> |=20
> | $a$
> |=20
> | \end{document}
> |=20
> | %%% Local Variables:=20
> | %%% mode: latex
> | %%% TeX-master: t
> | %%% End:=20
> `----
>
> C-c C-p C-b y=20
>
> I get "Type `C-c C-l' to display results of compilation", but no
> change in the file buffer.  The image is generated, because in the
> buffer of _region_.tex it is displayed.  There are two output buffers:
>
> *~/latex/test/auctex/preview-gs-mini output* and
> *~/latex/test/auctex/_region_ output*=20
>
> The first contains:

I have tracked this down now, but don't know an easy way to fix it.
The problem is when caching the preamble only: in that case look at
_region_.tex: the \message commands that are essential to tell
preview-latex which file the _region_.tex file is actually from appear
before \begin{document}, so mylatex.ltx skips them like the rest of
the preamble instead of executing them again.

The main problem is that AUCTeX should really, when running a region
command, pick apart preamble and the rest in case that parts of the
preamble appear in the region, and treat them separately, or using
mylatex.ltx will not work.  If anybody fixed this, I'd be grateful.
It would also be an excellent example of why merging preview-latex and
AUCTeX is a good idea: the bug reports are for preview-latex, the
culprit really is AUCTeX.

--=20
David Kastrup, Kriemhildstr. 15, 44793 Bochum


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