[l2h] Image generation bug?

[Igor Pechtchanski]

On Tue, 15 Feb 2005, Ross Moore wrote:

> Hi Igor,
>
> On 15/02/2005, at 5:09 AM, Igor Pechtchanski wrote:
>
> > Hi,
> >
> > I'm attempting to convert a LaTeX file that has custom picture commands
> > into HTML.  The images in the file should ideally be generated from the
> > LaTeX version of the commands.  However, latex2html includes the HTML (!)
> > versions of the commands, which results in invalid images.  Manually
> > editing images.tex to include the LaTeX versions of the commands does
> > produce the correct images.
> >
> > Below is the minimal example (with the actual command definition, FWIW,
> > but that's largely irrelevant, I think).  Yes, I realize that it's LaTeX
> > hackery, and that LaTeX2HTML can't be expected to parse that,
>
> Firstly, you need to:
>   \usepackage{html}
> then use the special environment:
>
>   \begin{imagesonly}
>    ...
>   \end{imagesonly}
>
> as follows:
>
> \documentclass{article}
> \usepackage{html}
> %begin{latexonly}
> [snip \ovalbox definition]
> %end{latexonly}
>
> \begin{imagesonly}
> [snip \ovalbox definition]
> \end{imagesonly}

Thanks, Ross.  This works (except for some [independent] weirdness with
the \string command).

As I understand it, though, the code above should be equivalent to putting
the definition of \ovalbox outside of the %begin/end{latexonly}
environment, right?  Since the \picture environment will only be
interpreted by LaTeX (either when processing the whole document, or via
images.tex), this should do no harm...

> > but I thought that's exactly what image generation was all about --
> > passing the bits that LaTeX2HTML doesn't understand to the actual
> > LaTeX for processing...
>
> The \begin{latexonly}  and  %begin{latexonly}  environments
> are only included when LaTeX is in control of the complete
> document. These are *not* included as part of images.tex .
>
> The  \begin{imagesonly}  environment passes extra material
> to  images.tex  but should be ignored by LaTeX when doing
> the whole document.
> In this case it means duplicating your definitions, but
> this isn't the only use for such an environment.

I would like to avoid the duplication of definitions, if at all possible
(there are quite a few of them, what I sent is a stripped-down testcase).

I've tried to put the \ovalbox definition outside of the %begin{latexonly}
environment, but that didn't work.  The images.tex file contained a
garbled version of the \ovalbox definition (attached).

> > I'm also attaching the generated images.tex file.  Please let me know if
> > more detail is needed.  Thanks,
> > 	Igor
>
> Alternatively, put your definitions into a .sty file, mydefs.sty say,
> and then \usepackage{mydefs}.  You will need to place mydefs.sty in a
> place where it can be found by LaTeX when needed.

Right, that's another thing to consider.  I may have to resort to that.

> Hope this helps,
> 	Ross

It does, thanks.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha at cs.nyu.edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor at watson.ibm.com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
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\usepackage[dvips]{color}


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\begin{document}
\pagestyle{empty}\thispagestyle{empty}\lthtmltypeout{}%
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% !!! IMAGES START HERE !!!

{\newpage\clearpage
\lthtmlfigureA{figure15}%
\begin{figure}\begin{picture}(100,20)(0,0)
\put(50,10){\@ifnextchar[\@valbox\@valb at x{Testing \string\@ifnextchar[\@valbox\@valb at x}}
\end{picture}
\end{figure}%
\lthtmlfigureZ
\lthtmlcheckvsize\clearpage}


\end{document}