From: Eli Zaretskii <eliz@gnu.org>
To: Bastien <bzg@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: line-start?
Date: Fri, 07 Feb 2020 17:56:01 +0200 [thread overview]
Message-ID: <83tv42e6i6.fsf@gnu.org> (raw)
In-Reply-To: <87h802a21a.fsf@bzg.fr> (message from Bastien on Fri, 07 Feb 2020 15:46:09 +0100)
> From: Bastien <bzg@gnu.org>
> Cc: emacs-devel@gnu.org
> Date: Fri, 07 Feb 2020 15:46:09 +0100
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > But that gives a buffer position, not column number.
>
> (- (window-line-start) (line-beginning-position))
>
> gives me the column number.
That's not the column number, that's the ordinal number of the
character on a line. It doesn't take into account characters that
take more than one column, it doesn't take into account characters
that are composed to produce a single grapheme cluster (or even a
single glyph), and it doesn't take into account variable-size fonts.
Of course, if all these are unimportant in your use case, you can
disregard them. But a general-purpose function cannot disregard them.
next prev parent reply other threads:[~2020-02-07 15:56 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-06 10:24 line-start? Bastien
2020-02-06 13:00 ` line-start? Bastien
2020-02-06 18:25 ` line-start? Eli Zaretskii
2020-02-07 6:42 ` line-start? Bastien
2020-02-07 9:20 ` line-start? Eli Zaretskii
2020-02-07 10:11 ` line-start? Bastien
2020-02-07 10:24 ` line-start? Eli Zaretskii
2020-02-07 10:48 ` line-start? Bastien
2020-02-07 13:43 ` line-start? Eli Zaretskii
2020-02-07 14:46 ` line-start? Bastien
2020-02-07 15:56 ` Eli Zaretskii [this message]
2020-02-07 17:42 ` line-start? Bastien
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