[l2h] \includegraphics with \width=\anewcommand[param]?

[Ross Moore]

> Hi:
> 

> Here is a macro defn I use to wrap \includegraphics.
> It gets me labels, captions, and with help from
> another macro, \fitfig, scaling.
> 
>     \newcommand{\insertfigure}[3][1.0]{
>       \begin{figure}[htbp]
> 	\centering
> 	\includegraphics[width=\fitfig{#1}]{#2.ps}%
> 	\vspace{.2in}
> 	\caption{#3}
> 	\label{fig:#2}
>       \end{figure}
>     }

This will have trouble, due to the  \fitfig command,
as a user-defined macro.
See below for more details.

 
> It's used like
> 
>     \insertfigure[0.6]{x-data-flow}{Data Flow in Protocol X}

This is fine, as the parameter data is constant.

 
> \fitfig handles the scaling factor, here, 0.6.  It returns
> the lesser of
> 
>     o  the image's natural width scaled by the factor or
>     o  the current horizontal width.
> 
> As I said, it works fine in the print version (dvips's PostScript,
> if that matters).  Here's the defn for \fitfig:
> 
>     \makeatletter
>     \newcommand{\fitfig}[1]{
>       \ifdim#1\Gin@nat@width<\textwidth
> 	#1\Gin@nat@width
>       \else
> 	\textwidth
>       \fi
>     }
>     \makeatother

This is not fine, as the value to be returned is not knowable
to LaTeX2HTML at the time it substitutes parameters into
user-defined macros.


> This doesn't work at all, though, in the HTML version.
> >From images.tex, here's the expansion of \fitfig and
> \insertfigure:
> 
>     \makeatletter
> 
>     %
>     \providecommand{\fitfig}[1]{
>       \ifdim#1\Gin@nat@width<\textwidth
> 	#1\Gin@nat@width
>       \else
> 	\textwidth
>       \fi
>     }
>     \makeatother
> 
>     %
>     \providecommand{\insertfigure}[3][1.0]{ 
>       \begin{figure}[htbp]
> 	\centering
> 	\includegraphics[width=
>       #1\Gin@nat@width<\textwidth
> 	#1\Gin@nat@width
>       \else
> 	\textwidth
>       \fi
>     ]{#2.ps}%%
> 
>     \vspace{.2in}
> 	\caption{#3}
> 	\label{fig:#2}  
>       \end{figure}
>     }
> 
> That's...not right.  The inline expansion of \fitfig
> inside \insertfigure breaks things.  Figs in the HTML
> look like typeset "@nat@width@natwidth" and so forth.

You need to tell LaTeX2HTML about the \fitfig command
before it encounters it in the document itself.
This way it will not be regarded as a user-defined macro.

Do this as follows, within .latex2html-init
or any init-file used by your job:


&ignore_command(<<'_IGNORE_COMMANDS_');
fitfig # {}
#
# other commands can go here, 1 per line
#
_IGNORE_COMMANDS_


Also, you will need to limit the applicability of the
normal LaTeX definition of \fitfig to appear only
within the correct contexts, including  images.tex .


\begin{imagesonly}
\newcommand{\fitfig}[1]{......
 .....
\end{imagesonly}

%begin{latexonly}
\newcommand{\fitfig}[1]{......
 .....
%end{latexonly}


Presumably you are already loading  \usepackage{html}
which is needed for the {imagesonly} environment
to be defined for a LaTeX job.

 
> Any advice on what I can change to fix this?

Try the above.

Hope this helps,

	Ross Moore


> 
> Thanks,
> Chris <jepeway@blasted-heath.com>.
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