Re: Wrapping section within LaTeX environment

[Xavier Garrido <garrido@lal.in2p3.fr>]

Hi Robert,

Le 16/12/2015 04:41, Robert Klein a écrit :
> Hi
>
> On 12/13/2015 03:00 PM, Xavier Garrido wrote:
>> 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
>
> If I read this right, you are writing the \end{correction} when the
> headline function is called for the /following/ headline.
>
> Then the (when...) should be outside the (if..) (because the
> string-match condition isn't valid anymore).

As far as I understand emacs-lisp, the (when ...) is within the else so 
when the string match condition is not valid. That's why I do not 
understand why this complicated filter was not working. Anyway, my 
second try was much better and easier to understand (I also apply 
suggestion from John to avoid inclusion of "correction" section title).

Thanks for having a look,
Xavier
-- 

   |
   |__     GARRIDO Xavier       Laboratoire de l'Accélérateur Linéaire
    /\     NEMO                 Université Paris-Sud 11
   /--\    garrido@lal.in2p3.fr UMR 8607
   |       garrido@in2p3.fr     Batiment 200
   |__     +33 1.64.46.84.28    91898 Orsay Cedex, France