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address@hidden: Display bug with miscomputed window-start]
From: |
Richard Stallman |
Subject: |
address@hidden: Display bug with miscomputed window-start] |
Date: |
Mon, 28 Oct 2002 22:02:11 -0500 |
Since this is in redisplay, could you look at it?
------- Start of forwarded message -------
Envelope-to: address@hidden
Delivery-date: Mon, 28 Oct 2002 11:54:08 -0500
X-Authentication-Warning: sykes.suse.de: schwab set sender to address@hidden
using -f
To: address@hidden
Subject: Display bug with miscomputed window-start
X-Yow: I don't think you fellows would do so much RAPING and PILLAGING if
you
played more PINBALL and watched CABLE TELEVISION!!
From: Andreas Schwab <address@hidden>
Sender: address@hidden
Date: Mon, 28 Oct 2002 17:48:49 +0100
Redisplay does not correctly handle characters that wrap around at the
right margin. To reproduce:
- - Insert a bunch of ^A (C-q C-a) in a buffer so that the line wraps around
- - Go to point-min
- - If there is an even number of columns insert a space, so that the last
^A in the line wraps around, i.e the ^ is in the last column and the A
appears at the start of the next screen line.
- - Do M-1 C-v (scroll-up 1)
The cursor will now be somewhere in the middle of the window, maybe not
even inside any buffer text. Now click on first visible ^A to move point
there and evaluate (list (point) (window-start)). You will get two
different numbers that are off by one (`(42 41)' for an 80 column
display).
Note that if you change the character that wraps around to a TAB this bug
does not occur.
Andreas.
- --
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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------- End of forwarded message -------
- address@hidden: Display bug with miscomputed window-start],
Richard Stallman <=