From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vitalie Spinu <spinuvit@gmail.com>
Subject: Re: org-export: how to copy the parsed tree?
Date: Sat, 01 Mar 2014 10:24:50 -0800
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In-Reply-To: <87vbvyp2v5.fsf@gmail.com> (Nicolas Goaziou's message of "Sat, 01
	Mar 2014 12:36:30 +0100")
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To: Nicolas Goaziou <n.goaziou@gmail.com>
Cc: emacs-orgmode@gnu.org

 >>> Nicolas Goaziou on Sat, 01 Mar 2014 12:36:30 +0100 wrote:

 > Hello,
 > Vitalie Spinu <spinuvit@gmail.com> writes:

 >> Is there an easy way to copy org sub-tree in :filter-parse-tree?
 >> 
 >> The structure of the parsed tree is somewhat complicated with recursive
 >> references to parents in multiple places. So, copy-tree infloops.

 > This is not really an answer to your question, but do you really need to
 > copy the full tree? There are tools to modify it. You can also build
 > a new parse tree and return it.

Thanks Nocolas. I need to copy only a subtree associated with a
headline. In a nutshell I need to "flatten" the tree of headlines for
the csv type exporter. That is, I need to replicate the parent headlines
across the children. For example
   
   * H1
     bla bla
   ** HA
      some text
   ** HB
      some other text
   
would translate into 
   
   * H1
     bla bla
   ** HA
      some text
   * H1
     bla bla
   ** HB
      some other text

I played with org-element-extract-element, org-element-set-contents and
org-element-insert-before but failed a big deal.

Main problem seems to be the lack of uniform interface to handle parents
in connection to secondary elements (which I don't understand at this
point). Is headline a secondary element?

The :parent seems to be stored in 2 places for the headline, in the
headline itself and in the :title. Most of the org code uses
org-element-put-property and org-element-property to access the parent
but some code like org-element-extract-element uses :parent from
:title. This makes it difficult to program as there are no explicit
getter/setter for the parent.

BTW, is there a way to pretty print the org tree? I think that's the
main barrier for me in understanding how it all works.

Thanks, 

  Vitalie