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Re: Several suggestions for image support

From: David Kastrup
Subject: Re: Several suggestions for image support
Date: 16 Apr 2004 15:49:18 +0200
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50

Stefan Monnier <address@hidden> writes:

> > If instead just the table cell opened and the cursor would be
> > positioned there, one could use this for serious table editing.
> > Since the whole table is available as one graphic, loading
> > hundreds of separate images would be inconvenient.  It is
> > conceivable to split the image within TeX and load it as separate
> > graphics.  However, the involved complexity is far greater if I
> > want to keep the alignment intact.
> Sounds great for preview-latex, except I'm wondering how you can
> make it work.  I mean, how can you figure out what are the pixel
> positions of the various cells in your image?

preview-latex talks with GhostScript via a bidirectional pipe.  The ==
PostScript operator will output things to stdout.  The \special{ps:
Some PostScript code} sequence will execute the given PostScript code
at the page position corresponding to its source code position.  An
\errmessage will inform preview-latex of the buffer position.
\everyhbox{...} will execute code at the start of every cell in a
table.  \everycr{...} will execute code at the end of each table

The amount of dirty tricks involved here is moderate in comparison to
what is already there.

David Kastrup, Kriemhildstr. 15, 44793 Bochum

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