rhodecode/templates/forms/codemirror.pt

<div tal:define="rows rows|field.widget.rows;
                 cols cols|field.widget.cols;
                 css_class css_class|field.widget.css_class;
                 oid oid|field.oid;
                 name name|field.name;
                 style style|field.widget.style;
                 help_block help_block|field.widget.help_block|'';
                 codemirror_options codemirror_options|field.widget.codemirror_options|{};
                 codemirror_mode codemirror_mode|field.widget.codemirror_mode|''
                ">

<textarea tal:attributes="rows rows;
                          cols cols;
                          class string: form-control ${css_class or ''};
                          style style"
          id="${oid}"
          name="${name}">${cstruct}</textarea>

<p tal:condition="help_block" class="help-block">${help_block}</p>
<script type="text/javascript">
deform.addCallback(
 '${oid}',
 function(oid) {
   var myCodeMirror = initCodeMirror(oid, '', false, ${codemirror_options});
   setCodeMirrorMode(myCodeMirror, '${codemirror_mode}');
 }
);
</script>

</div>