org-element-map no-recursion argument?

org-element-map no-recursion argument?

[James Harkins]

I've written some emacs-lisp using org-element-map to iterate over source 
code blocks in an org buffer and insert them into another buffer, including 
a listing number and caption (so it's different from tangling).

I was just trying to tweak it to ignore source code blocks in a comment 
section.

More specifically -- I had moved some material into a "Removed" subtree 
(with a tag "noexport"). This subtree contains some source blocks, but I 
want my function to ignore these.

I thought I could wrap the entire "Removed" section in #+begin/end_comment, 
and then tell org-element-map to skip comment blocks for recursion.

(org-element-map tree 'src-block (lambda (element) ...)
  nil nil 'comment)

But this has no effect. I guess the src-block filter erases the distinction 
between "live" and commented sections.

I can work around it by commenting out the captions, but it would be nicer 
to have an entire "off-limits" section of the document.

hjh

Re: org-element-map no-recursion argument?

[Nicolas Goaziou]

Hello,

James Harkins <jamshark70@gmail.com> writes:

> I've written some emacs-lisp using org-element-map to iterate over
> source code blocks in an org buffer and insert them into another
> buffer, including a listing number and caption (so it's different from
> tangling).
>
> I was just trying to tweak it to ignore source code blocks in
> a comment section.
>
> More specifically -- I had moved some material into a "Removed"
> subtree (with a tag "noexport"). This subtree contains some source
> blocks, but I want my function to ignore these.
>
> I thought I could wrap the entire "Removed" section in
> #+begin/end_comment, and then tell org-element-map to skip comment
> blocks for recursion.
>
> (org-element-map tree 'src-block (lambda (element) ...)
>  nil nil 'comment)
>
> But this has no effect. I guess the src-block filter erases the
> distinction between "live" and commented sections.
>
> I can work around it by commenting out the captions, but it would be
> nicer to have an entire "off-limits" section of the document.

This is a reasonable request, indeed.

One (backward compatible) solution could be to extend possible values
for NO-RECURSION argument, and allow functions on one argument (the
current element) in addition to symbols.

When the NO-RECURSION function returns a non-nil value for a given
element, the main function from `org-element-map' is applied to the
element, but not to its contents.


What do you think?


Regards,

-- 
Nicolas Goaziou