Re: Tick Reduction

[Eli Zaretskii]

> Date: Mon, 29 Nov 2021 16:06:31 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org, stefankangas@gmail.com, dgutov@yandex.ru
> 
> That hack will need to stay, because we cannot unsupport the old
> mode-line code.  It just won't be used with the new mode-line faces.

There's one other alternative: extend display_string to accept
FIELD_WIDTH in pixel units (or add another argument to that effect).
This could be set by examining the 'display' property before calling
display_string.  The disadvantage is that only the min-width spec
could be supported this way for mode-line constructs that are produced
from C strings.