Re: Wrapping section within LaTeX environment

[Xavier Garrido <xavier.garrido@gmail.com>]

Le 14/12/2015 02:39, John Kitchin a écrit :
> could you provide a brief example of what you want to happen?
>
> i.e. are you looking for this:
>
> * some heading :correction:
> one line of content
>
> to convert to this in LaTeX?
>
> \begin{correction}
> one line of content
> \end{correction}
>

Exactly. Actually when I read your mail I realize that 
=org-export-filter-headline-functions=  filter not only give access to 
the heading but to the whole content within the heading. So,

#+BEGIN_SRC emacs-lisp
   (defun cpp-correction-headline (contents backend info)
     (when (and (org-export-derived-backend-p backend 'latex)
                (string-match "\\`.*correction.*\n" (downcase contents)))
       (concat "\\begin{correction}" (replace-regexp-in-string 
"\\`.*correction.*\n" "" contents) "\\end{correction}"))
     )
   (add-to-list 'org-export-filter-headline-functions 
'cpp-correction-headline)
#+END_SRC

is doing what I want. So thanks for the insights and sorry for the noise.

Xavier


>
> Xavier Garrido writes:
>
>> Dear orgers,
>>
>> I would like to wrap a given org section between =\begin,\end= LaTeX
>> environment. These sections are identified by a special tag :correction:
>> and to initiate the =\begin= flag I have basically no problem by using
>> the  org-export-filter-headline-function filter. The problem comes when
>> I want to close the environment i.e. when another section starts. I have
>> try this piece of code
>>
>> #+BEGIN_SRC emacs-lisp
>>     (setq correction-flag nil)
>>     (defun cpp-correction-headline (contents backend info)
>>       (if (and (org-export-derived-backend-p backend 'latex)
>>                  (string-match "\\`.*correction.*\n" (downcase contents)))
>>           (progn
>>             (setq correction-flag t)
>>             (replace-match "\\\\begin{correction}" nil nil contents)
>>             )
>>         (when correction-flag
>>           (setq correction-flag nil)
>>           (concat "\\end{correction}" contents))
>>         )
>>       )
>>     (add-to-list 'org-export-filter-headline-functions
>> 'cpp-correction-headline)
>> #+END_SRC
>>
>> but I get several =\end{correction}= in the produced LaTeX file.
>> Actually this is much more a emacs-lisp related question since the
>> boolean =correction-flag= seems not to work and I don't know why (of
>> course I have very little knowledge in lisp). Can some emacs-lisp
>> experts helps me understand why the above code just does not work.
>>
>> Thanks a lot,
>> Xavier
>
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu
>