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bug#34038: 26.1; set-window-start sometimes fails to set window start


From: Markus Triska
Subject: bug#34038: 26.1; set-window-start sometimes fails to set window start
Date: Fri, 11 Jan 2019 15:31:55 +0100
User-agent: Emacs/24.5

Eli Zaretskii <address@hidden> writes:

> IOW, if there's a contradiction between the requested window-start and
> showing point, the latter always wins in Emacs.

OK! However, in the snippet I posted, there appears to be no such
contradiction, because the window-start can be set to the intended
position while point is also displayed. This is illustrated before you
press a key when you run the snippet, and after you press a key, I would
like to reliably restore the exact same display situation as before.

>
> How can you expect Emacs to do something like that?  It cannot
> possibly do something that will leave point not displayed, can it?

I agree. However, that is not what I was requesting. What I need for my
use case is to reliably restore a configuration that I know is possible
to display on the grounds that it has already been displayed before. Is
there any way to do this, or could this please be provided?

Thank you and all the best,
Markus





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