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Re: scroll-up makes no progress on overtall lines

From: Kim F. Storm
Subject: Re: scroll-up makes no progress on overtall lines
Date: Wed, 20 Jul 2005 10:36:47 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

David Kastrup <address@hidden> writes:

> This bug report will be sent to the Free Software Foundation,
> not to your local site managers!
> Please write in English if possible, because the Emacs maintainers
> usually do not have translators to read other languages for them.
> Your bug report will be posted to the address@hidden mailing list.
> Please describe exactly what actions triggered the bug
> and the precise symptoms of the bug:
> Hi Kim, when I use preview-latex to generate a line that is taller
> than the buffer and then repeatedly press <next>, the screen position
> goes through a somewhat strange circular pattern, but never manages to
> scroll through it.  scroll-down, previous-line and next-line all
> manage to make it through the image, in contrast.

I suppose that line contains an image as the last thing.

If that line is the _last_ visible line in the buffer, you see some
jumpy effects in next when it reaches the last part of that line.

I looked at it before, and found that it is a bad interaction between
placing the image text property on the last NL in the buffer and the
way eolp and eobp works.

If it happens in the middle of a buffer, I would like to know more
about how to reproduce it.

Kim F. Storm <address@hidden> http://www.cua.dk

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