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From: "Allen S. Rout" <asr@ufl.edu>
To: emacs-orgmode@gnu.org
Subject: More export filter examples out there?
Date: Tue, 17 Mar 2015 18:15:49 -0400	[thread overview]
Message-ID: <mea93m$s95$1@ger.gmane.org> (raw)


I'm trying to accomplish a custom export task which I'd hoped to be
pretty simple:  something like:


In each status section, only export the first child headline.


After several dumb ideas, I decided that doing it with a filter was
probably the Right Place.  I built a filter intended to be used on

:filter-parse-tree

and attempted to express:

If you're parent is a headline
and your parent's title is 'Status'
and you're not the first of your siblings

then don't be included.  I've added my malfunctioning filter below,to
clearly display my "thinking".

I don't seem to be able to get the title as a string.  org-export-data
seems to expect a different 'info' than the 'info' present at filter
time.  I get complaints about

org-export-data: Wrong type argument: hash-table-p, nil

if I uncomment the attempt to string compare the title.


I'm finding my experience with XSLT to be a handicap; I bring
expectations to the table that are misguided.  Is there a pretty-printer
or other dump for the export parse tree?   The dump I sometimes get in
*Messages* is not all that readable.

Should I be thinking of this as a parse-table operation, or should I be
reasoning about it from :filter-headline?


More generally, anyone got some art for some similar reconstruction
they've done, which they might like to share?


- Allen S. Rout




(defun ox-asr-only-first-status  ( tree backend info )
  " Arrange that, under headlines marked 'Status', only the first of
them is included.

"
  ( org-element-map tree (remq 'item org-element-all-elements)

    ( lambda (e)
      ( let* ( ( parent       ( org-element-property :parent e) )
	       ( first-sib    ( car (org-element-contents parent )))
	       ( parent-type  ( org-element-type parent ))
	       ( parent-title ( org-element-property :title e))
;	       ( pt-string    ( org-export-data parent-title info ))
	       )
	
	(if (and
	     ( eq parent-type 'headline )
	     ( not (eq e first-sib ))
;	     ( string= (org-export-data parent-title) "Status")
	     )
	    ( org-element-set-contents e  "-->" parent-title "<---  "
(org-element-contents e))
	  )
	
	)
      )

    )


  tree
  )

next             reply	other threads:[~2015-03-17 22:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-17 22:15 Allen S. Rout [this message]
2015-03-17 22:53 ` More export filter examples out there? Nicolas Goaziou

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