Re: [PATCH] org: add property names from #+PROPERTY keywords to completion list

[Nick Dokos <ndokos@gmail.com>]

Hi Kyle,

thanks for the review.

Kyle Meyer <kyle@kyleam.com> writes:

> Nick Dokos writes:
>
>> Here's a patch to enhance the property name completion list with names from
>> #+PROPERTY keyword lines: at the moment, only property names found in property
>> drawers are used to populate the completion list.
>
> Thanks for the patch.
>
>> org: add property names from #+PROPERTY keywords to completion list
>>
>> * lisp/org.el (org-buffer-property-keys): ehhance the completion list
>
> Typo: enhance.  And as a convention nit, it should be capitalized.
>
Fixed.

>> with property names from #+PROPERTY keywords, not just property
>> drawers.
>>
>> ... 
>> +		(mapcar (lambda (s)
>> +			  (let ((split (split-string s)))
>> +			    (nth 0 split)))
>> +			(cdar (org-collect-keywords '("PROPERTY"))))
>>  		nil)))
>
> IMO the let-binding doesn't add any clarity over
>
>   (nth 0 (split-string s))
>
Fixed.
>
> I wondered about possible duplicates, but it looks like
> org-buffer-property-keys already takes care of that at the end.
>
> I think this patch is a clear improvement as is, but in the context of
> completion (and the stack exchange post you link to), isn't the handling
> around *_ALL keywords still a bit off?  It seems a caller would want to
> complete without the _ALL; to use the example from that post, with
> "#+PROPERTY: GENRE_ALL ...", the caller would want to complete "GENRE".
> Is it worth providing special handling here?
>
>
My assumption was that one could put in two properties (that's what
the OP was doing in his setup file): a GENRE_ALL one already properly
set-up and the corresponding bare GENRE property as a placeholder with
an empty value, just to get the completion. It seems to me like a
reasonable way to do it, without making org-buffer-property-keys too
opinionated.

I could see stripping all the _ALL suffixes from the property names
at the end, but personally it just makes me a bit queasy :) But if
there is consensus one way or the other, I'd be happy to implement it.

Here's the updated patch:

--8<---------------cut here---------------start------------->8---
From 50c625f935d5581952d37801943550ff44c473ff Mon Sep 17 00:00:00 2001
From: Nick Dokos <ndokos@redhat.com>
Date: Mon, 6 Jul 2020 21:49:41 -0400
Subject: [PATCH] org: add property names from #+PROPERTY keywords to
 completion list

* lisp/org.el (org-buffer-property-keys): Enhance the completion list
with property names from #+PROPERTY keywords, not just property
drawers.

See https://emacs.stackexchange.com/questions/59448/ for details.
---
 lisp/org.el | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lisp/org.el b/lisp/org.el
index 4a1a83d0f..8deaa1ed9 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -13084,6 +13084,10 @@ COLUMN formats in the current buffer."
 	(props (append
 		(and specials org-special-properties)
 		(and defaults (cons org-effort-property org-default-properties))
+		;; Get property names from #+PROPERTY keywords as well
+		(mapcar (lambda (s)
+			  (nth 0 (split-string s)))
+			(cdar (org-collect-keywords '("PROPERTY"))))
 		nil)))
     (org-with-wide-buffer
      (goto-char (point-min))
-- 
2.25.1

--8<---------------cut here---------------end--------------->8---

-- 
Nick

"There are only two hard problems in computer science: cache
invalidation, naming things, and off-by-one errors." -Martin Fowler