Re: [ox-html] Multiple wraps around sections

[Rasmus <rasmus@gmx.us>]

Hi Christian and Nicolas,

Christian Moe <mail@christianmoe.com> writes:

> Rasmus writes:
>
>> Is there any way I can easily get an /extra/ container around my
>> sections?
>
> You would probably want to create an export filter for sections. See the
> manual, Export > Advanced configuration > Filters.

The thing is semantics are pretty easy to mess up in HTML-like
languages compared to, say, LaTeX, since I have to figure out the
ending point.  Thus, it'd obviously prefer not touch it.  Hence the
question.

A short trial suggests that this filter does the job:

#+begin_src html
(defun rasmus/org-html-headline-add-extra-div (headline backend info)
  "Add an extra :html-container around top level sections."
  (when (org-export-derived-backend-p backend 'html)
    (let ((element
           (plist-get (text-properties-at (next-property-change 0 headline) headline) :parent)))
      (when (= 1 (org-element-property :level element))
        (save-match-data
          (string-match "\n" headline)
          (concat
           (replace-match
            (format "\n<%s class=\"outline-container-top\">\n" (org-html--container element info))
            t nil headline)
           (format "</%s>\n" (org-html--container element info))))))))
#+end_html

The critical part is the next-property-change.  I assume that the
first element is always the headline in question.
(Do you know if this is generally true, Nicolas?)

>> Note, my knowledge of HTML(5) & CSS is very limited so maybe I'm
>> overlooking something obvious here.
>
> I don't think you're overlooking any way to add a container. 

Thanks, I also couldn't find anything else, examining ox-html.el.

> But since the exporter already provides a fair set of containers, it is
> possible that you are overlooking a way to accomplish whatever you want
> to do with the existing output and CSS.

Quite possibly.  I did HTML back in gymnasium, but I really haven't
followed the "trends" in this area.

—Rasmus

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