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bug#17678: 24.4.50; Feature Request -- calculate new `window-start` & `w

From: Stefan Monnier
Subject: bug#17678: 24.4.50; Feature Request -- calculate new `window-start` & `window-end` before visual redisplay
Date: Wed, 11 Jun 2014 17:58:11 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux)

> The display engine changes window-start for several reasons, only one
> of them being that point moved off screen.

Is there a comment somewhere that documents the cases where it can happen?

> I think follow-mode also needs to know when the window-end changes
> (which could happen with no changes in window-start).  This is
> normally known only at the end of window redisplay, IIRC.

In the case of follow-mode, I think the best way to handle that is to
make it possible for follow-mode to force redisplay to go through the
windows in a particular order.


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