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From: Ihor Radchenko <yantar92@posteo.net>
To: Max Nikulin <manikulin@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Trailing whitespace after export snippets without a transcoder (was: [PATCH v2] org-faq.org: Inline comments)
Date: Sat, 20 Apr 2024 11:14:33 +0000	[thread overview]
Message-ID: <87h6fwmgkm.fsf@localhost> (raw)
In-Reply-To: <uvon8j$p0u$2@ciao.gmane.io>

Max Nikulin <manikulin@gmail.com> writes:

>>>>>> +#+begin_src org
>>>>>> +The following line may become a patagraph separator.
>>>>>> +@@comment: might give unexpected effect @@
>>>>>> +Put some text before @@comment: a better variant
>>>>>> +@@ and after instread.
>>>>>> +#+end_src
>> 
>> I am no longer able to reproduce the problem with @@comment:...@@
>> splitting paragraph in the above example.
>
> I see no changes in respect to ox-md on the main branch.

Right.
Upon debugging further, to my great surprise, I found the following
comment in ox.el:

			;; Export snippets never return a nil value so
			;; that white spaces following them are never
			;; ignored.
			(and (eq type 'export-snippet) "")

and then even a test:

;; Ignored export snippets do not remove any blank.
  (should
   (equal "begin  end\n"
	  (org-test-with-parsed-data "begin @@test:A@@ end"
	    (org-export-data-with-backend
	     tree
	     (org-export-create-backend
	      :transcoders
	      '((paragraph . (lambda (paragraph contents info) contents))
		(section . (lambda (section contents info) contents))))
	     info))))

The test was added in the commit
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=a6d9fd82e

    Back-end developers should pay attention to the fact that white spaces
    before and after an ignored export snippet now are accumulated in the
    output.

I have no clue about the rationale of this special behaviour - it dates
back to the days when Org export was merged. It is also not documented
anywhere, AFAIK.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>


  reply	other threads:[~2024-04-20 11:14 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-22  0:04 Inline comments ypuntot
2023-06-22  1:50 ` Max Nikulin
2023-06-28 15:51   ` [PATCH] org-faq.org: " Max Nikulin
2023-06-29 10:47     ` Ihor Radchenko
2023-06-30 10:34       ` Max Nikulin
2023-07-01 10:48         ` Ihor Radchenko
2023-08-06 18:34           ` Bastien Guerry
2023-07-01 15:24         ` Ihor Radchenko
2023-07-02  5:46           ` Org FAQ design (Re: [PATCH] org-faq.org: Inline comments) Max Nikulin
2023-07-08  5:48       ` [PATCH v2] org-faq.org: Inline comments Max Nikulin
2023-07-08  9:31         ` Ihor Radchenko
2023-07-10 16:09           ` Max Nikulin
2023-09-01 11:28             ` Ihor Radchenko
2024-04-15 12:17               ` Ihor Radchenko
2024-04-17 14:44                 ` Max Nikulin
2024-04-20 11:14                   ` Ihor Radchenko [this message]
2024-04-20 15:02                     ` Trailing whitespace after export snippets without a transcoder Max Nikulin
2024-04-21 13:00                       ` Ihor Radchenko
2024-04-22 10:45                         ` Max Nikulin
2024-04-22 19:01                           ` Ihor Radchenko
2024-04-25 10:54                             ` Max Nikulin
2024-04-28 11:19                               ` Ihor Radchenko
2024-05-19 10:04                                 ` Ihor Radchenko

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