GNU bug report logs - #36884
Default python mode with electric-indent-mode sometimes indents empty lines

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From: Jarosław Rzeszótko <jrzeszotko <at> gmail.com>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: 36884 <at> debbugs.gnu.org
Subject: bug#36884: Default python mode with electric-indent-mode sometimes indents empty lines
Date: Fri, 2 Aug 2019 07:08:21 +0200

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Perhaps this behavior exists because there can also be a situation like
this:

def test():
    print("test")
[cursor, on empty line in middle of indented block]
    print("test")

where what electric indent does after pressing RET (creates new line
aligned to the print statements) makes sense. I think it is mostly
irritating though, and editors I tested, Vim and Sublime Text, do not
automatically indent in any of the situations I mentioned.

FWIW this works as a workaround for me:

(setq electric-indent-functions
      '((lambda (inserted-char)
          (when (eq major-mode 'python-mode)
            ;; Do not auto-indent after inserting any empty line
            (when (save-excursion
                    (previous-line)
                    (beginning-of-line)
                    (looking-at "^\s*$"))
              'no-indent)))))

Cheers,
Jarek

On Fri, Aug 2, 2019 at 3:26 AM Noam Postavsky <npostavs <at> gmail.com> wrote:

> Andreas Röhler <andreas.roehler <at> easy-emacs.de> writes:
>
> > AFAIU electric-indent-mode doesn't run a timer, cursor position alone
> > would not trigger it.
>
> electric-indent-mode works from post-self-insert-hook.  Not sure how
> cursor position and timers are related.
>
>
>
>

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