From: Jonathan Gregory <jgrg@autistici.org>
To: emacs-orgmode@gnu.org
Subject: Re: Get list of top-level headings
Date: Wed, 19 May 2021 10:48:29 -0300 [thread overview]
Message-ID: <874keyg74d.fsf@autistici.org> (raw)
In-Reply-To: <41-60a4c380-5-7d67d100@4304905>
Hello Florian
On 19 May 2021, Florian Lindner wrote:
> Hello,
>
> I, an Emacs Lisp newbie, want to get a list of all top-level
> headings
> of the current buffer. My approach so far is:
>
> (defun test-org-map()
> (interactive)
> (setq headings '())
> (org-map-entries (lambda ()
> (setq current-header-item
> (org-element-property :
> title (org-element-at-point))
> (message "Header: %s" current-header-item)
> (message "Is String: %s" (stringp
> (org-element-property :title (org-element-at-point))))
> (setq headings (append current-header-item
> headings))
> )
> "LEVEL=1"
> )
> (dolist (heading headings)
> (message "Header Item: %s" heading)
> )
> )
>
> This gives the otput:
>
> Header: AAA
> Is String: t
> Header: BBB
> Is String: t
> Header Item: 66 [3 times]
> Header Item: 65 [3 times]
>
> so basically the (org-element-property :title
> (org-element-at-point)
> does exactly what I want, but building the list does not what I
> want.
> I suppose that comes from a fundamental misunderstanding of how
> strings work in elisp.
>
> I would appreciate a short explanation (or pointers) why this
> does not
> work. And of course, I am very open to completely different,
> likely
> better, approches to that simply problem!
>
> Thanks,
> Florian
The org-map-entries function calls FUNC at each headline, so you
have to (1) find the headline/title and (2) add it to your list.
One way to do this is with the push macro.
--8<---------------cut here---------------start------------->8---
(defun test-org-map ()
(interactive)
(let (headlines)
(org-map-entries
(lambda ()
(let* ((element (org-element-at-point))
(headline (org-element-property :title element)))
(push headline headlines)))
"LEVEL=1")
(print (nreverse headlines))))
--8<---------------cut here---------------end--------------->8---
Or by searching the buffer:
--8<---------------cut here---------------start------------->8---
(defun test-org-map ()
(interactive)
(let (headlines)
(save-excursion
(goto-char (point-max))
(while (re-search-backward org-complex-heading-regexp nil t)
(let ((headline (match-string-no-properties 4)))
(when (= (org-current-level) 1)
(push headline headlines))))
(print headlines))))
--8<---------------cut here---------------end--------------->8---
BTW you're missing a closing parenthesis in:
(setq current-header-item (org-element-property :title
(org-element-at-point)))
Maybe that's why you're getting errors.
--
Jonathan
prev parent reply other threads:[~2021-05-19 13:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 7:50 Get list of top-level headings Florian Lindner
2021-05-19 13:33 ` John Kitchin
2021-05-19 14:15 ` Jonathan Gregory
2021-05-19 14:36 ` John Kitchin
2021-05-19 13:48 ` Jonathan Gregory [this message]
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