Re: Set-window-vscroll sometimes doesn't work

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Fri, 23 Oct 2020 16:30:40 -0400
> Cc: help-gnu-emacs@gnu.org
> 
> I really need to set them in the same time because when I scroll down, and 
> stopped at a tall image (or tall line), I don’t want to scroll to the top of 
> that image immediately. Instead, I want to scroll just enough to show the 
> bottom of it. This requires setting window-start to that image and set 
> vscroll = image height - line height.

This makes no sense to me, because you want to deliberately deny the
user from showing the entire screen line or its important parts.  The
bottom of a large image will generally not show anything important,
and most of the screen line with the surrounding text could remain
undisplayed.  Why is that a good idea? just because some other editor
behaves like that?

> So maybe setting both window-start and vscroll should be considered as a 
> valid thing to do?

You can still do that as I've shown before, by inserting (sit-for 0)
in the middle, right?  But I urge you not to do that because it makes
no sense when text is mixed with images.