htlatex/tex4ht with ScriptEnv and HTML entities

Question

I am using htlatex to translate from LaTeX to HTML. I've created a \ScriptEnv environment for code as suggested by this answer:

htlatex inserting environment in verbatim

It's working well, but it is being rather too literate -- there is no conversion to HTML entities, so any code with "<"'s is being handled badly.

Is there any way to stop this?

Edited:

In my case, the situation is worse because some of my output looks like an HTML tag with open and close <>.

(isubclasses OntologyBook)
;;=> #{#<OWLClassImpl <bc33d2c3-7ecb413c-bb04-83af2295c465#walk_through#TakeWing>>}

Answer 1

another edit:

of you don't want to postprocess html, you may use different mean to achieve verbatim environment. For example with fancyvrb package:

\usepackage{fancyvrb}
\Preamble{xhtml}
\def\StartSuppressPage{\nobreak\vfil\penalty0\vfilneg\vtop\bgroup}
\def\EndSuppressPage{\egroup}
\renewenvironment{tawny}
{\IgnorePar\EndP\StartSuppressPage\HCode{<pre><code class="clojure">}\HtmlParOff\NoFonts\Verbatim}
{\endVerbatim\EndSuppressPage\HCode{</code></pre>}\EndNoFonts\HtmlParOn\par}
\Configure{fancyvrb}{}{}{}{}{}{}
\begin{document}
\EndPreamble

and sample of resulting html:

tudin, felis odio placerat quam, ac pulvinar elit purus eget enim. Nunc vitae
tortor. Proin tempus nibh sit amet nisl. Vivamus quis tortor vitae risus porta
vehicula.
</p>

   <pre><code class="clojure">
<a 
 id="x1-3r1"></a>(defclass&#x00A0;Pizza
<a 
 id="x1-5r2"></a>&#x00A0;&#x00A0;:super&#x00A0;Thing)
<a 
 id="x1-7r3"></a>tady&#x00A0;je&#x00A0;radek
<a 
 id="x1-9r4"></a>a&#x00A0;&#x003E;&#x00A0;b&#x00A0;&amp;&#x00A0;c
   </code></pre>
<!--l. 15--><p class="indent" >   Nam dui ligula, fringilla a, euismod sodales, sollicitudin vel, wisi. Morbi auctor
lorem non justo. Nam lacus libero, pretium at, lobortis v

Edit:

it seems that in this case lua filter for make4ht must be used. Use this .mk4 file:

local filter= require "make4ht-filter"
local entities = function(s)
  return '<code class="clojure">' .. s:gsub('<code class="clojure">(.-)</code>', function(a) 
    local escapes = {["<"]="lt",[">"]="gt",["&"]="amp"}
    return a:gsub("([%<%>%&])", function(x)
      return "&"..(escapes[x] or x) .. ";"
    end)
   end) .. '</code>'
end
local process = filter(entities, uj)
if mode == "draft" then
  Make:htlatex{} 
  Make:match("html$", process)
else
  Make:htlatex{}
  Make:htlatex{}
  Make:htlatex{}
  Make:match("html$", process)
end

filter entities is defined, which process content of <code class="clojure"> element and convert all <,> and & to html entities:

<pre><code class="clojure"> 
(defclass Pizza
  :super Thing)
  (isubclasses OntologyBook)
  ;;=&gt; #{#&lt;OWLClassImpl &lt;bc33d2c3-7ecb413c-bb04-83af2295c465#walk_through#TakeWing&gt;&gt;}
</code></pre>

---

Old version:

Content of \ScriptEnv is exported verbatim, without any processing, so it seems that this can't be solved at the LaTeX side. But you can post-process html with some tool to replace these prohibited characters with html entities. Some Lua script could be used for that, but easiest way is to use tidy command:

tidy  -m  -utf8 -q -i filename.html

before:

<pre><code class="clojure"> 
  a > b & c
</code></pre>

after

  <pre>
<code class="clojure"> 
  a &gt; b &amp; c
</code>
</pre>

with make4ht you can automatize this. make build file filename.mk4:

if mode == "draft" then
  Make:htlatex{} 
else
  Make:htlatex{}
  Make:htlatex{}
  Make:htlatex{}
  Make:match("html$", "tidy -m -utf8 -q -i ${filename}")
end

with this build file, you will be able to quickly view your file with

make4ht -m draft -c yourconfigfile.cfg filename

and tidy will be used only for final build. Other feature is that all output html files will be processed (this is useful if you split sections or chapters to standalone html files)