From: Bastien <bzg@altern.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 16497@debbugs.gnu.org
Subject: bug#16497: 24.3.50; `move-to-column' ignores invisible text at the beginning of the line, which create problems when using string-rectangle
Date: Mon, 20 Jan 2014 17:50:25 +0100 [thread overview]
Message-ID: <87fvoilhri.fsf@bzg.ath.cx> (raw)
In-Reply-To: <83d2jmirt1.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 20 Jan 2014 17:41:46 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
> Before we design the interface, can we please define what is the job
> to be done here?
I don't know what needs to be done, but what's confusing is that both
`move-to-column' and `line-move-to-column' ignore invisible characters
within the line, but `line-move-to-column' goes back to real beginning
of the line while `move-to-column' goes back to the visual beginning
of the line.
> If it's just to get to Nth character from bol, aren't there easier
> ways of doing that?
Sure. If `string-rectangle' can do the right thing with no change
in such internals, that's good -- but I trust Stefan when he says
that there may be cases where you want `string-rectangle' to behave
as it does now.
Another probably related quirk:
emacs -Q
M-: (insert "abc") RET
C-a
M-: (put-text-property (point) (1+ (point)) 'invisible t) RET
C-a
C-a
C-a
... ! See the point moving from b to c and back again.
Probably some heisenbug since edebug-defun'ing move-beginning-of-line
and stepping through it does not have the bug.
Such a contrived example does not deserve a bug report, but i thought
maybe this is related to the current discussion.
--
Bastien
next prev parent reply other threads:[~2014-01-20 16:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-19 16:26 bug#16497: 24.3.50; `move-to-column' ignores invisible text at the beginning of the line, which create problems when using string-rectangle Bastien Guerry
2014-01-19 17:11 ` Eli Zaretskii
2014-01-20 9:22 ` Bastien
2014-01-20 15:38 ` Eli Zaretskii
2014-01-20 16:25 ` Bastien
[not found] ` <<83eh42iry6.fsf@gnu.org>
2014-01-20 18:10 ` Drew Adams
2014-01-19 20:48 ` Stefan Monnier
2014-01-20 9:11 ` Bastien
2014-01-20 15:41 ` Eli Zaretskii
2014-01-20 16:50 ` Bastien [this message]
2014-01-20 18:14 ` Stefan Monnier
2014-01-20 18:22 ` Bastien
2014-01-20 19:10 ` Stefan Monnier
2014-01-20 20:55 ` Bastien
2014-01-20 19:19 ` Eli Zaretskii
[not found] <<87ob38gcp1.fsf@bzg.ath.cx>
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