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Re: Strange display behavior after filling


From: Eli Zaretskii
Subject: Re: Strange display behavior after filling
Date: Tue, 11 Apr 2006 07:11:34 +0300

> Date: Tue, 11 Apr 2006 11:48:06 +0900 (JST)
> From: YAMAMOTO Mitsuharu <address@hidden>
> 
> I found some strange display behavior after filling.  In the
> following, "row" means a displayed horizontal segment, and "line"
> means a sequence of characters delimited by newlines.
> 
>   1. emacs -D -Q
>   2. M-q  (I'm not sure why this is needed.)

I don't know either, but it loads newcomment.

>   3. Insert "123456789 " (without quotations or newlines) 18 times.
>      Say, C-x ( 1 2 3 4 5 6 7 8 9 SPC C-x ) C-u 1 7 C-x e.
>      It is displayed in three rows.
>   4. M-<
>   5. C-u 1 C-v
> 
> Now the first row becomes continued to both directions.
> 
>   6. M-q
> 
> Then the first row is displayed shorter than the second one, whereas
> they have the same number of characters.
> 
>   7. C-p C-n C-n
> 
> The line number in the mode line says the cursor is at the third line.
> But it is displayed at the second row that corresponds to the second
> line.

The problem is with redisplay of the cursor: it is displayed in the
wrong place.  Try typing C-a and arrow keys, and eventually you will
see a second cursor in the correct place.  C-l fixes the messed up
display.




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