Re: HTML5 presentations

[Jambunathan K <kjambunathan@gmail.com>]

> Admittedly I don't know what transformation are required by the html5
> presentation mechanism, however I would think that an approach like that
> taken in org-export-as-s5 [1], in which the existing org-export-as-html
> is simply wrapped in a let-form which sets variable values uses hooks to
> post-process, should be the simplest and would leverage as much of the
> existing machinery as possible.

To strengthen my argument for the generic backend agnostic driver in
org-odt branch, here are few concrete examples from org-s5.

org-s5 requires an insider understanding (see [1]) of what org does in
the background. Using my exporter wouldn't place such a huge
responsibility on the user part.

With [2] in mind, `org-export-content-div' on the current org-html.el be
"redefined".

[3] could also be elegantly handled with the new driver.

Let me re-iterate, I strongly urge that such one-off solutions be built
on top of html exporter in org-odt branch. It will help make the new
backend-agnostic driver evolve and more usable. Everyone would benefit.

While we are on the topic of presentations, let me add that with my new
exporter building a html/odt presentations along OpenOffice lines [4]
would be quite easy. That is one can make a generic presentation driver
out of the existing document driver.

IMHO let's not fallback on hacks when elegant solutions are readily
available.

Let me note that I am not interested in presentations so much as to
build a patch for or improve org-s5/org-html5. 

In effect, my argument is for embracing and extending the
org-html/org-odt and help it evolve in more useful ways.

ps: I recognize that org-s5 creates useful presentations and gets the
job done.


Footnotes: 
[1]  Snippet of org-s5

--8<---------------cut here---------------start------------->8---
(org-export-preprocess-hook
 (list
  (lambda ()
    (let ((class "slide"))
      (org-map-entries
       (lambda ()
	 (save-excursion
	   (org-back-to-heading t)
	   (when (= (car (org-heading-components)) 1)
	     (put-text-property (point-at-bol) (point-at-eol)
				'html-container-class class)))))))))
--8<---------------cut here---------------end--------------->8---

[2]

--8<---------------cut here---------------start------------->8---
(lambda ()
  (save-excursion
    (replace-regexp
     (regexp-quote "<div id=\"content\">")
     (let ((info `(("author" . ,author)
                   ("title" . ,title)
                   ("date" . ,(substring date 0 10)))))
       (join `("<div class=\"layout\">"
               "<div id=\"controls\"><!-- no edit --></div>"
               "<div id=\"currentSlide\"><!-- no edit --></div>"
               "<div id=\"header\"></div>"
               "<div id=\"footer\">"
               ,(org-fill-template org-s5-title-string-fmt info)
               "</div>"
               "</div>"
               ""
               "<div class=\"presentation\">"
               ,(org-fill-template org-s5-title-page-fmt info)))))))
--8<---------------cut here---------------end--------------->8---

[3]

(lambda ()
  (save-excursion
    (replace-regexp
     (regexp-quote "<div id=\"table-of-contents\">")
     "<div id=\"table-of-contents\" class=\"slide\">")))

[4]

http://wiki.services.openoffice.org/wiki/Documentation/OOoAuthors_User_Manual/Impress_Guide/Creating_slides_from_an_outline
 
>
> Best -- Eric
>
> Footnotes: 
> [1]  https://github.com/eschulte/org-S5/blob/master/org-export-as-s5.el#L17



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