GNU bug report logs - #28855
26.0.90; display-line-numbers-mode does not respect (line|wrap)-prefix '(space :align-to N) text property

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From: Paul Rankin <hello <at> paulwrankin.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 28855 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: bug#28855: 26.0.90; display-line-numbers-mode does not respect (line|wrap)-prefix '(space :align-to N) text property
Date: Tue, 17 Oct 2017 10:47:11 +1000

On Tue, 17 Oct 2017, at 02:05 AM, Eli Zaretskii wrote:
> Right, :align-to still counts from the window edge, even when line
> numbers are displayed, whereas you expected it to count from the end
> of the line-number display.

linum-mode.el (in 26.x) manages to display line numbers without interfering, so it’s really just about display-line-numbers-mode.

> When this was briefly discussed during development, we decided not to
> change the reported window dimensions and geometry, including those of
> the text area, to account for the screen estate taken by the
> line-number display.  But maybe :align-to should be an exception, when
> used to align buffer text (as opposed to header-line or mode-line)?
> Though I'm bothered whether some users of :align-to may not want this
> automatic offset.  :align-to is a very popular feature; does anyone
> know or imagine why a Lisp program would NOT like such an offset?

Citing other discussions is not really relevant, if there’s a problem there’s a problem. User expectation is if a user writes codes following the Elisp manual, the expectation is that it should continue to work. In this case, using :align-to should align to its specified value.

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