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Re: Temporarily select-window, without updating mode-line face and curso


From: martin rudalics
Subject: Re: Temporarily select-window, without updating mode-line face and cursor fill?
Date: Mon, 3 May 2021 09:50:49 +0200

>> Sure, but the event gives you the window, and through it the buffer of
>> that window, so I see no particular reason to make the window
>> selected.
>
>
> A given buffer may appear in multiple windows, which likely will have
> different “window-start” and “window-end”.  So you have to find the
> line position in the buffer relevant for that particular window.  Also
> tying me to this is the fact that the format-mode-line method
> obviously uses windows, not buffers.

I'm still missing you.  Both `window-start' and `window-point' have a
WINDOW argument.  So running `get-buffer-window-list' for the buffer you
want to manage and calling the former for each window you get that way
should all do what you want.

And please keep in mind: Calling `select-window' in an :eval form within
`mode-line-format' means asking for trouble.  Calling `set-window-start'
and `set-window-point' anywhere within `mode-line-format' or a hook like
`window-scroll-functions' or `window-state-change-functions' means
asking for more trouble.  All these serve to react to changes in the
window configuration but should never change that configuration itself.

martin




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