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Re: Scrolling in buffers with inline images / point outside viewport
From: |
David Engster |
Subject: |
Re: Scrolling in buffers with inline images / point outside viewport |
Date: |
Sun, 09 Jun 2013 21:00:48 +0200 |
User-agent: |
Gnus/5.130008 (Ma Gnus v0.8) Emacs/24.3 (gnu/linux) |
Klaus-Dieter Bauer writes:
> It can partly be solved, as demonstrated in [1], by doing smart positioning
> of point. However, I can't think of a solution how to scroll when there are
> images that are larger than the buffer height if after every scroll
> operation point must be visible. The solution from [1] for instances gets
> stuck at large images, unless one scrolls continously in which case
> presumable Emacs do a redisplay during the scrolling, that would force the
> viewport into a position that makes point visible.
Yes, I'm the guy who did this stuff. It's tricky, and I agree it's never
been working as well as it should be. It's been a while since I worked
on this, but I think the main problem in the end was that you'd need to
know the height of lines *before* they are rendered, which I think is
impossible in Emacs.
There's another problem with set-window-vscroll, which I did not mention
there: the further you go via vscroll, the slower it becomes until it's
pretty much unbearable. Don't even think of scrolling through large
buffers with this.
-David