Save-excursion that works with org visibility?

Save-excursion that works with org visibility?

[Nikolay Kudryavtsev]

Is there any way to modify node visibility and then revert those 
changes? In particular I'm interested in doing and then reverting 
(org-content).

What follows is more details at what I'm trying to accomplish in the end.

Let's say we have nodes:
* A
** B
*** TODO С
For task node C I want to see which parent node has tag "project" and 
then put it into a prefix in agenda. Here's my code:
===
(defun org-get-task-project ()
   (let ((project ""))
     (save-excursion
       (org-content)
       (while
           (progn
             (ignore-errors (outline-up-heading 1))
             (when (and (eq project "")
                        (member "project" (org-get-tags-at (point) t)))
               (setq project (nth 4 (org-heading-components))))
             (> (nth 1 (org-heading-components)) 1))))
     project))

(with-eval-after-load 'org-agenda
   (add-to-list 'org-agenda-prefix-format
                '(todo . " %i %?-20(org-get-task-project)")))
===
In the code above we have to make all headings visible first with 
org-content because outline-up-heading works only on visible nodes.

-- 
Best Regards,
Nikolay Kudryavtsev

Re: Save-excursion that works with org visibility?

[Kyle Meyer]

Nikolay Kudryavtsev <nikolay.kudryavtsev@gmail.com> writes:

> Is there any way to modify node visibility and then revert those 
> changes? In particular I'm interested in doing and then reverting 
> (org-content).

If you pass a non-nil value for the INVISIBLE-OK argument of
outline-up-heading, I think that your function should work without the
org-content call.  Also, it might be worth replacing outline-up-heading
with org-up-heading-safe, which should be faster.

-- 
Kyle

Re: Save-excursion that works with org visibility?

[Nikolay Kudryavtsev]

Thanks. This removed the need for (org-content).

-- 
Best Regards,
Nikolay Kudryavtsev

Re: Save-excursion that works with org visibility?

[John Kitchin]

Is org-save-outline-visibility  what you are looking for?

Nikolay Kudryavtsev writes:

> Is there any way to modify node visibility and then revert those
> changes? In particular I'm interested in doing and then reverting
> (org-content).
>
> What follows is more details at what I'm trying to accomplish in the end.
>
> Let's say we have nodes:
> * A
> ** B
> *** TODO С
> For task node C I want to see which parent node has tag "project" and
> then put it into a prefix in agenda. Here's my code:
> ===
> (defun org-get-task-project ()
>    (let ((project ""))
>      (save-excursion
>        (org-content)
>        (while
>            (progn
>              (ignore-errors (outline-up-heading 1))
>              (when (and (eq project "")
>                         (member "project" (org-get-tags-at (point) t)))
>                (setq project (nth 4 (org-heading-components))))
>              (> (nth 1 (org-heading-components)) 1))))
>      project))
>
> (with-eval-after-load 'org-agenda
>    (add-to-list 'org-agenda-prefix-format
>                 '(todo . " %i %?-20(org-get-task-project)")))
> ===
> In the code above we have to make all headings visible first with
> org-content because outline-up-heading works only on visible nodes.


--
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu

Re: Save-excursion that works with org visibility?

[Nikolay Kudryavtsev]

Thanks for the info, this answers the topic question.

-- 
Best Regards,
Nikolay Kudryavtsev