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
)
