From: Eli Zaretskii <eliz@gnu.org>
To: Tak Kunihiro <homeros.misasa@gmail.com>
Cc: tkk@misasa.okayama-u.ac.jp, yantar92@gmail.com, 45915@debbugs.gnu.org
Subject: bug#45915: 28.2; delete-char deletes two letters
Date: Sat, 17 Sep 2022 14:17:41 +0300 [thread overview]
Message-ID: <83o7ve1c8a.fsf@gnu.org> (raw)
In-Reply-To: <m2pmfuwgxh.fsf@misasa.okayama-u.ac.jp> (message from Tak Kunihiro on Sat, 17 Sep 2022 17:20:26 +0900)
> From: Tak Kunihiro <homeros.misasa@gmail.com>
> Cc: Tak Kunihiro <homeros.misasa@gmail.com>, 45915@debbugs.gnu.org,
> yantar92@gmail.com
> Cc: tkk@misasa.okayama-u.ac.jp
> Date: Sat, 17 Sep 2022 17:20:26 +0900
>
> 1. Following function will create a problematic org-table.
>
> (defun emacs-bug-reproduce-45915 ()
> "Reproduce bug#45915."
> (interactive)
> (with-current-buffer (get-buffer-create "*temp buffer*")
> (erase-buffer)
> (require 'org)
> (orgtbl-mode 1)
> (setq org-table-copy-increment nil)
> (insert (format "emacs-version: %s, org-version: %s\n" emacs-version org-version))
> (insert "| 1 |"))
> (switch-to-buffer-other-window "*temp buffer*")
> (execute-kbd-macro (kbd "M-< C-n C-f C-f"))
> (message "I will call #'org-table-copy-down.")
> (call-interactively #'org-table-copy-down))
> ;;; (call-interactively 'emacs-bug-reproduce-45915)
>
> 2. Buffer is with the 1x2 table as shown below. <delete> deletes one
> letter on the first row, and it does two letters on the
> second row.
>
> emacs-version: 28.2, org-version: 9.5.5
> | 1 |
> | 1 |
No, it doesn't delete 2 characters in the 2nd line, it deletes just
one. After you press <Delete>, type C-b (to go to the space between
the two '|' characters, and type "C-x =". You will see this:
Char: SPC (32, #o40, #x20, part of display " ") point=51 of 54 (93%) column=1
Note the "51 to 54" part: there's a 'display' property there that
covers _two_ buffer positions, not one. That's because the two
'display' properties on the two SPC characters before the deletion
have the same value:
> (buffer-substring (line-beginning-position) (line-end-position))
>
> line 1 returns: "| 1 |"
> line 2 returns: #("| 1 |" 1 2 (display (space :relative-width 1)) 3 4
> (display (space :relative-width 1)))
Those two 'display' properties are now displayed as a single stretch
glyph, because two adjacent text properties with the same value are
indistinguishable from a single one that spans all of the buffer
positions.
This is not a bug, this is how Emacs always worked.
The question is now why is this a problem for you, and how it affects
Org Table. The solution, if there's a need for one, should IMO come
from the Org side.
next prev parent reply other threads:[~2022-09-17 11:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-16 8:01 bug#45915: 27.1; deletechar distorts org-table Tak Kunihiro
[not found] ` <m2k0rtak9x.fsf@misasa.okayama-u.ac.jp>
[not found] ` <87im477xpk.fsf@gnu.org>
[not found] ` <1AD1B9B7-5A15-4F86-9274-B04B83694C85@misasa.okayama-u.ac.jp>
[not found] ` <m135p8pey0.fsf_-_@misasa.okayama-u.ac.jp>
[not found] ` <m1zgpc7qkj.fsf_-_@misasa.okayama-u.ac.jp>
[not found] ` <877dc0sqm6.fsf@localhost>
[not found] ` <m1lf047wn9.fsf@misasa.okayama-u.ac.jp>
[not found] ` <87ilqrusnk.fsf@localhost>
[not found] ` <m15yk1co5p.fsf_-_@misasa.okayama-u.ac.jp>
[not found] ` <m1r10dj86u.fsf_-_@misasa.okayama-u.ac.jp>
2022-09-16 3:59 ` bug#45915: 28.2; delete-char deletes two letters Ihor Radchenko
2022-09-17 3:48 ` Tak Kunihiro
2022-09-17 6:38 ` Eli Zaretskii
2022-09-17 8:20 ` Tak Kunihiro
2022-09-17 11:17 ` Eli Zaretskii [this message]
2022-09-18 5:44 ` Tak Kunihiro
2022-09-18 5:56 ` Eli Zaretskii
2022-09-18 8:05 ` Eli Zaretskii
2022-09-19 1:02 ` Tak Kunihiro
2022-09-22 12:03 ` Ihor Radchenko
[not found] ` <87sfkjaa50.fsf@localhost>
2022-09-22 12:46 ` Eli Zaretskii
2022-09-22 21:36 ` Tak Kunihiro
[not found] ` <20220923.063658.703945866478584943.tkk@misasa.okayama-u.ac.jp>
2022-09-23 6:02 ` Eli Zaretskii
2022-09-19 1:24 ` Tak Kunihiro
2022-09-19 13:27 ` Eli Zaretskii
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