Tabs in export of code

[Giuseppe Lipari <giulipari@gmail.com>]

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Dear all,

I am preparing a set of slides with examples of java code. I am using the
beamer exporter, configured for using minted with the following options:


#+BEGIN_SRC emacs-lisp :exports none :results silent
  (setq org-latex-minted-options
        '(("frame" "lines")
          ("bgcolor" "mybg")
          ("fontsize" "\\scriptsize")
          ("mathescape" "")
          ("samepage" "")
          ("xrightmargin" "0.1cm")
          ("xleftmargin"  "0.1cm")
          ))
#+END_SRC


Also, I have my emacs init.org containing:


#+begin_src emacs-lisp
  (setq org-src-fontify-natively  t)
  (setq org-src-tab-acts-natively t)
#+end_src

and later

#+BEGIN_SRC emacs-lisp
  (add-hook 'java-mode-hook (lambda ()
                              (setq c-basic-offset 4
                                    tab-width 4
                                    indent-tabs-mode nil)))
#+END_SRC



Ok, now the problem.I want to export a slide with this snippet:


#+BEGIN_SRC java
  class PrimeThread extends Thread {
      long minPrime;
      PrimeThread(long minPrime) {
          this.minPrime = minPrime;
      }

      public void run() {
          // compute primes larger than minPrime
          ...
      }
  }
  ...
  PrimeThread p = new PrimeThread(143);
  p.start();
#+END_SRC

There is not tab in this snipper (I never use tabs in code, only spaces).
Unfortunately, when opening the tex file, I see that a tab has been
introduced whenever 8 consecutive spaces are found, in particular at line 4.

Here is the produced code:

\begin{frame}[fragile,label=sec-3-2]{Thread implementation through
sub-classing}
 \begin{minted}[frame=lines,bgcolor=mybg,fontsize=\scriptsize,mathescape,samepage,xrightmargin=0.1cm,xleftmargin=0.1cm]{java}
class PrimeThread extends Thread {
    long minPrime;
    PrimeThread(long minPrime) {
    this.minPrime = minPrime;
    }

    public void run() {
    // compute primes larger than minPrime
    ...
    }
}
...
PrimeThread p = new PrimeThread(143);
p.start();
\end{minted}
\end{frame}

As you can maybe see (it depends on how your email client shows tabs),
there is a tab character in front of the fourth line.

Where this tab comes from? Is there any org-mode variable I can configure
to prevent this behaviour? I did a quick search on google, but could find
nothing


Thanks in advance

Giuseppe Lipari


-- 
Giuseppe Lipari
LIFL
Université de Lille 1
blogs: http://scacciamennule.blogspot.com  (Italian)
<http://scacciamennule.blogspot.com>
          http://okpanico,wordpress.com          (Italian)
          http://algoland.wordpress.com           (English)

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