* Help on org-export-filter-link-functions
@ 2014-10-03 11:19 Daimrod
2014-10-04 16:40 ` John Kitchin
0 siblings, 1 reply; 5+ messages in thread
From: Daimrod @ 2014-10-03 11:19 UTC (permalink / raw)
To: emacs-orgmode
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Hi,
I've wrote a simple filter to customize how links are exported in
latex:
#+BEGIN_SRC
(defun dmd--latex-bib-link-filter (data backend info)
"Convert a bib link to a citation (e.g. bib:foo93 -> \cite{foo93})."
(let* ((beg (next-property-change 0 data))
(link (if beg (get-text-property beg :parent data))))
(cond ((and link
(org-export-derived-backend-p backend 'latex)
(string= (org-element-property :type link) "bib"))
(format "\\cite{%s}" (org-element-property :path link)))
((and link
(org-export-derived-backend-p backend 'latex)
(string= (org-element-property :type link) "file")
(string= (org-element-property :path link) "~/.bib.bib"))
(format "\\cite{%s}" (org-element-property :search-option link)))
(t data))))
#+END_SRC
And I was wondering whether there is an easier way to retrieve the org
properties stored in the text properties of DATA.
Best,
--
Daimrod/Greg
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Help on org-export-filter-link-functions
2014-10-03 11:19 Help on org-export-filter-link-functions Daimrod
@ 2014-10-04 16:40 ` John Kitchin
2014-10-05 1:13 ` Rasmus
0 siblings, 1 reply; 5+ messages in thread
From: John Kitchin @ 2014-10-04 16:40 UTC (permalink / raw)
To: Daimrod; +Cc: emacs-orgmode
Daimrod <daimrod@gmail.com> writes:
Why don't you just define how the link should be exported in your link
definition?
for example:
https://github.com/jkitchin/jmax/blob/master/org/org-ref.org#the-links
You can see a link that is defined, with different export formats for
different backends.
I am intrigued by your function! It does not seem to work for all types
of links though, for example I tried on on some file links,
e.g. file:bib.bib, and [[file.bib]], but these fall in the (t data)
case. [[file:bib.bib][bibliography]] on the other hand gets handled and
you can access the element properties.
I tried a similar approach on a table, but it did not work as I
expected. Apparently the next property change puts you in a table-cell,
rather than the parent table.
I too am wondering if there is a defined way to get to the element
properties within a filter function. For example, in this post
http://kitchingroup.cheme.cmu.edu/blog/2014/09/22/Showing-what-data-went-into-a-code-block-on-export/
I concocted a preprocess scheme to get a list of table names, and then a
filter function to put the names in the export on each table. It would
be much more elegant to get it directly from the table element somehow.
> Hi,
>
> I've wrote a simple filter to customize how links are exported in
> latex:
>
> #+BEGIN_SRC
> (defun dmd--latex-bib-link-filter (data backend info)
> "Convert a bib link to a citation (e.g. bib:foo93 -> \cite{foo93})."
> (let* ((beg (next-property-change 0 data))
> (link (if beg (get-text-property beg :parent data))))
> (cond ((and link
> (org-export-derived-backend-p backend 'latex)
> (string= (org-element-property :type link) "bib"))
> (format "\\cite{%s}" (org-element-property :path link)))
> ((and link
> (org-export-derived-backend-p backend 'latex)
> (string= (org-element-property :type link) "file")
> (string= (org-element-property :path link) "~/.bib.bib"))
> (format "\\cite{%s}" (org-element-property :search-option link)))
> (t data))))
> #+END_SRC
>
> And I was wondering whether there is an easier way to retrieve the org
> properties stored in the text properties of DATA.
>
> Best,
--
-----------------------------------
John Kitchin
Professor
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
http://kitchingroup.cheme.cmu.edu
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Help on org-export-filter-link-functions
2014-10-04 16:40 ` John Kitchin
@ 2014-10-05 1:13 ` Rasmus
2014-10-05 13:11 ` John Kitchin
0 siblings, 1 reply; 5+ messages in thread
From: Rasmus @ 2014-10-05 1:13 UTC (permalink / raw)
To: emacs-orgmode
John Kitchin <jkitchin@andrew.cmu.edu> writes:
> I too am wondering if there is a defined way to get to the element
> properties within a filter function.
qNo. But sometimes you can recover it from the text-properties, if it
is not a verb, (~·~, =·=). Her's an example:
(defun rasmus/get-org-headline-string-element (headline backend info)
"Return the org element representation of a headline."
(let ((prop-point (next-property-change 0 headline)))
(and prop-point (plist-get (text-properties-at prop-point headline) :parent))))
--
And I faced endless streams of vendor-approved Ikea furniture. . .
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Help on org-export-filter-link-functions
2014-10-05 1:13 ` Rasmus
@ 2014-10-05 13:11 ` John Kitchin
2014-10-05 22:24 ` Rasmus
0 siblings, 1 reply; 5+ messages in thread
From: John Kitchin @ 2014-10-05 13:11 UTC (permalink / raw)
To: Rasmus; +Cc: emacs-orgmode
Rasmus <rasmus@gmx.us> writes:
hmmm... the sometimes makes me nervous. I found even for links, this
only works sometimes. That doesn't seem reliable to me.
I think extending existing backends
(e.g. http://orgmode.org/manual/Advanced-configuration.html) is probably
more reliable for getting element properties, and approximately the same
amount of work.
I guess it just depends on how significantly you are modifying the
export, and what information you need to modify it. Filters are great
for simple wrapping and regexp based modifications. A derived backend is
better if you need reliable element properties, and a different format
than the default export.
> John Kitchin <jkitchin@andrew.cmu.edu> writes:
>
>> I too am wondering if there is a defined way to get to the element
>> properties within a filter function.
>
> qNo. But sometimes you can recover it from the text-properties, if it
> is not a verb, (~·~, =·=). Her's an example:
>
> (defun rasmus/get-org-headline-string-element (headline backend info)
> "Return the org element representation of a headline."
> (let ((prop-point (next-property-change 0 headline)))
> (and prop-point (plist-get (text-properties-at prop-point headline) :parent))))
--
-----------------------------------
John Kitchin
Professor
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
http://kitchingroup.cheme.cmu.edu
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Help on org-export-filter-link-functions
2014-10-05 13:11 ` John Kitchin
@ 2014-10-05 22:24 ` Rasmus
0 siblings, 0 replies; 5+ messages in thread
From: Rasmus @ 2014-10-05 22:24 UTC (permalink / raw)
To: emacs-orgmode
Hi John,
John Kitchin <jkitchin@andrew.cmu.edu> writes:
> hmmm... the sometimes makes me nervous. I found even for links, this
> only works sometimes. That doesn't seem reliable to me.
With headlines the case where it does not work is for verb-only
headings. I guess that could occur more frequently with links, though
I have never done anything serious with links. q
> I think extending existing backends
> (e.g. http://orgmode.org/manual/Advanced-configuration.html) is probably
> more reliable for getting element properties, and approximately the same
> amount of work.
In practice derived classes could be a lot of work.
There is also two hooks that run before processing, but you'd need to
be able to solve the issue with org syntax. In practice this is not a
limitation as you can use snippets for whatever backend.
> I guess it just depends on how significantly you are modifying the
> export, and what information you need to modify it. Filters are great
> for simple wrapping and regexp based modifications. A derived backend is
> better if you need reliable element properties, and a different format
> than the default export.
Yeah.
–Rasmus
--
I almost cut my hair, it happened just the other day
^ permalink raw reply [flat|nested] 5+ messages in thread
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-- links below jump to the message on this page --
2014-10-03 11:19 Help on org-export-filter-link-functions Daimrod
2014-10-04 16:40 ` John Kitchin
2014-10-05 1:13 ` Rasmus
2014-10-05 13:11 ` John Kitchin
2014-10-05 22:24 ` Rasmus
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