How to remove horizontal lines around figures for htlatex output

Question

htlatex adds horizontal lines around figures floats. For instance, the HTML output for the following tex:

\begin{figure}
\begin{centering}
\includegraphics{photo.png}
\end{centering}
\end{figure}

is as follows:

<hr class="figure">
<div class="figure">
<p class="noindent">
<img src="photo.png" alt="PIC" class="graphics" width="250pt" height="250pt">
<br/>
</div><hr class="endfigure">

I want to prevent automatic insertion of <hr>s around my figure. Is there any way to do so?

Answer 1

The way htlatex translates LaTeX environments and commands into HTML entities is configured by the file html4.4ht.

On my Windows 7 computer using MikTeX, this file resides in the %HOMEPATH%\AppData\Roaming\MiKTeX\2.9\tex\generic\tex4ht directory.

You can provide your own configuration file when invoking htlatex. The rules defined there overrule the standard configuration.

> htlatex myfile.tex "myfile.cfg,html"

The configuration file is a LaTeX file as described here, for example.

Based on html4.4ht, I used the following configuration file myfile.cfg

\Preamble{html}
\begin{document}

% Removing div element surrounding tables and figures.
\ConfigureEnv{tabular}
    {\HCode{}}{\HCode{}}{}{}
\ConfigureEnv{figure} 
    {\HCode{}}{\HCode{}}{}{}    
% Always ignore \hline commands. Tables will rather be styled using CSS.
\Configure{hline}{\HCode{}}
% This one removes the rulers. Taking a look at html4.4ht should make 
% clear what has been changed.
\Configure{float}
   {\ifOption{refcaption}{}{\csname par\endcsname\ShowPar \leavevmode}}
   {\HCode{}}
{\ifvmode \IgnorePar \fi\EndP \HCode{}\csname par\endcsname\ShowPar}
\EndPreamble

Note that in order to remove HTML code that would otherwise being added, you have to use the \HCode{} command to generate an empty HTML output rather than just leaving the brackets empty.