GNU bug report logs - #38181
Actual height of mode-line not taken into account

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From: Jonas Bernoulli <jonas <at> bernoul.li>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 38181 <at> debbugs.gnu.org
Subject: bug#38181: Actual height of mode-line not taken into account
Date: Sat, 16 Nov 2019 00:51:19 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

> Why the need to use advising?  Your recipe shows that calling
> redisplay before fit-window-to-buffer also solves the problem.  Can't
> you do something like that only when you add such tall images to the
> mode line?

This is about packages like powerline, spaceline, doom-modeline and my
moody.  These packages add images to the global mode-line-format to make
them prettier.  These packages do not create any buffers of their own
and they never call fit-window-to-buffer themselves, but whenever that
function is called for a new buffer redisplay has to be run first, so
the advice is needed.

> An alternative would be to scale the image so that it doesn't enlarge
> the mode line, btw.  Is that possible in your use cases?

No because enlarging the mode-line is one of the things I did in order
to make it prettier (imo).  It's a goal not a means or side-effect.

You can see a screenshot on https://github.com/tarsius/moody.
Many other "mode-line prettifiers" also increase its height.

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