From: Chong Yidong <cyd@stupidchicken.com>
Cc: Ken Manheimer <ken.manheimer@gmail.com>, emacs-devel@gnu.org
Subject: Re: need option so line-move-to-column ignores fields, plus patch
Date: Sun, 24 Sep 2006 18:04:55 -0400 [thread overview]
Message-ID: <87zmcokjjs.fsf@stupidchicken.com> (raw)
In-Reply-To: <E1GRWqE-0000PS-91@fencepost.gnu.org> (Richard Stallman's message of "Sun\, 24 Sep 2006 12\:28\:30 -0400")
Richard Stallman <rms@gnu.org> writes:
> | 1. With the cursor adjacent to the right of any bar,
> | if you move forwards a line (^N), the cursor slips to column 0.
> | 2. Moving backwards (^P) with the cursor in the same place, however,
> | doesn't have this problem - it sticks near the boundary.
>
> #1 is clearly a bug. C-n should be symmetrical with C-p.
I don't see where else the cursor can possibly go in #1. The logic of
line-move is like this: "Try to naively move the cursor vertically
down. If this moves us into a new field, go instead to the beginning
of the field (if going forward) or the end of the field (if going
backward)."
In #1, the "naive" motion moves the cursor into a new field, so it
shouldn't move to the old column; instead, it moves into the beginning
of the field.
The C-p behavior is also correct. The situation actually is
symmetric, but subtle. When the cursor moves backwards, and finds
itself in a new field, it moves to the *end* of that field. When the
field boundaries are arranged as
|
|
|
the logical behavior implies that the cursor should stick near the
boundary. Spontaneous symmetry breaking!
> | 4. Forwards with the cursor on or to the bar's left leaves it in column 0.
>
> That is a bug. It should be sticky except staying to the left of the bar.
Same here---the cursor is moving into a new field.
I have checked in a fix to improve column motion in certain other
situations.
next prev parent reply other threads:[~2006-09-24 22:04 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-31 15:48 need option so line-move-to-column ignores fields, plus patch Ken Manheimer
2006-08-31 16:25 ` Ken Manheimer
2006-08-31 17:11 ` David Kastrup
2006-08-31 22:57 ` Richard Stallman
2006-09-01 4:17 ` Miles Bader
2006-09-01 6:39 ` Ken Manheimer
2006-09-03 15:17 ` Richard Stallman
2006-09-04 4:43 ` Ken Manheimer
2006-09-04 17:18 ` Richard Stallman
2006-09-04 19:56 ` Ken Manheimer
2006-09-06 8:49 ` Richard Stallman
2006-09-06 16:52 ` Ken Manheimer
2006-09-07 6:54 ` Richard Stallman
2006-09-07 14:47 ` Ken Manheimer
2006-09-23 23:29 ` Ken Manheimer
2006-09-24 16:28 ` Richard Stallman
2006-09-24 20:17 ` Ken Manheimer
2006-09-25 20:48 ` Richard Stallman
2006-09-24 22:04 ` Chong Yidong [this message]
2006-09-24 22:10 ` Chong Yidong
2006-09-25 1:53 ` Ken Manheimer
2006-10-11 4:13 ` Ken Manheimer
2006-10-11 18:50 ` Richard Stallman
2006-10-11 19:19 ` Ken Manheimer
2006-10-12 22:37 ` Richard Stallman
2006-09-25 1:31 ` Ken Manheimer
2006-09-25 8:36 ` Slawomir Nowaczyk
2006-09-25 20:48 ` Richard Stallman
2006-09-25 21:43 ` Chong Yidong
2006-09-27 17:18 ` Ken Manheimer
2006-09-29 16:32 ` Richard Stallman
2006-09-29 18:21 ` Chong Yidong
2006-09-07 6:54 ` Richard Stallman
2006-09-07 14:27 ` Ken Manheimer
2006-09-05 4:48 ` Miles Bader
2006-09-01 6:30 ` Ken Manheimer
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