From mboxrd@z Thu Jan  1 00:00:00 1970
From: suvayu ali <fatkasuvayu+linux@gmail.com>
Subject: Re: Filtering in export hooks
Date: Tue, 6 Sep 2011 12:16:56 +0200
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To: Carsten Dominik <carsten.dominik@gmail.com>
Cc: org-mode mailing list <emacs-orgmode@gnu.org>

Hi Carsten,

On Tue, Sep 6, 2011 at 11:49 AM, Carsten Dominik
<carsten.dominik@gmail.com> wrote:
> Which of the preprocessing hooks are you using? =A0I am still confused
> by your description, maybe you can make a small example and show exactly =
what works and what does not work?
>

This is what I am using at the moment:

(defun my-org-export-latex-wrap-todo ()
  "Wrap heading with arbitrary latex environment."
  (interactive)
  (let* ((tags (org-get-tags-string))
	 (heading (org-get-heading t))	; heading with todo
	 (content (org-get-entry))
	 (color (cond ((string-match ":QnA:" tags)  "color=3Dblue!40")
		      ((string-match ":Qn:" tags) "color=3Dyellow!40"))))
    (when color
      (org-mark-subtree)
      (delete-region (region-beginning) (region-end))
      (insert (concat
	       (format "\\todo[inline,%s]{\\textbf{%s}%%\n" color heading)
	       (format "%s\n}%%\n" content))))))

(add-hook 'org-export-preprocess-after-blockquote-hook
	  (lambda ()
	    (let ((match "QnA|Qn"))
	      (org-map-entries (lambda () (my-org-export-latex-wrap-todo))
			       match))))

This works great as long as the tags: option is non-nil (t or
not-in-toc). Setting it to nil just ignores it and everything gets
like a regular headline. I am not using org-export-preprocess-hook
because some of the latex gets escaped during the export (e.g. {..}
becomes \{..}).

I hope this is clearer.

--=20
Suvayu

Open source is the future. It sets us free.