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Re: delete-overlay causes recentering
From: |
Chong Yidong |
Subject: |
Re: delete-overlay causes recentering |
Date: |
Mon, 23 Apr 2007 21:35:53 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.98 (gnu/linux) |
Richard Stallman <address@hidden> writes:
> When a window starts is in a continued line, it is recentered whenever
> the window is unselected--by activating the minibuffer, switching to
> another window, or switching to another frame.
>
> That is the spurious scrolling bug I have mentioned. Thank you
> for connecting it with specific code. Now it should be possible
> to track it down.
>
> Yidong wrote:
>
> I don't know an easy way to fix this.
>
> Can you describe the series of events that cause the
> spurious recentering?
KFS described the problem in the original change that led to this:
When the filling command has reformatted the buffer text, the
redisplay code still starts window display at the old window start
-- which still is in the middle of a line, but not at the same
relative position in the line as before ... so it gets confused.
This is just one way in which a buffer change can mess things up
when window start is not at the start of a line, so I think it is
generally a bit difficult to find a method which will always select
the intuitively best window start after such a change.
As a result, there will be times when the redisplay engine must
recenter, simply to avoid screen corruption.
On the other hand, I just realized that the "recentering due to
minibuffer-activation" problem is a simple oversight on my part, when
I was fixing the recentering to make it less aggressive. I've checked
in a small fix.
- Re: delete-overlay causes recentering, (continued)
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/14
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/14
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/15
- Re: delete-overlay causes recentering, Kim F. Storm, 2007/04/15
- Re: delete-overlay causes recentering, Johan Bockgård, 2007/04/23
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/23
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/23
- Re: delete-overlay causes recentering, Stefan Monnier, 2007/04/23
- Re: delete-overlay causes recentering, Richard Stallman, 2007/04/23
- Re: delete-overlay causes recentering,
Chong Yidong <=
- Re: delete-overlay causes recentering, Richard Stallman, 2007/04/25
- Re: delete-overlay causes recentering, Chong Yidong, 2007/04/27
- Re: delete-overlay causes recentering, Richard Stallman, 2007/04/28