Re: Should text-scale trigger hooks?

[Joost Kremers <joostkremers@fastmail.fm>]

On Thu, Nov 07 2024, Eli Zaretskii wrote:
> The functions which manipulate face-remapping-alist force redisplay of
> the buffer in which the alist was changed, and from Emacs display POV
> this is the only thing that should happen to make sure the affected
> buffer's display is redrawn.  Please explain why buffer's redisplay is
> not enough for the packages you mention to do their job.

Speaking for `visual-fill-column`: it's a package that adjusts the text
margins in wide windows. The goal is to have buffers that use
visual-line-mode wrap text at `fill-column`, not at the window's edge. If
the window configuration or size changes, the width of the margins needs to
be recalculated, so the package puts a function on the relevant hooks to do
that.

If the text size is changed, the window margins also need to be
recalculated, but this does not happen automatically. The README of
`visual-fill-column` suggests to advise the function
`text-scale-adjust` to solve this (see
https://codeberg.org/joostkremers/visual-fill-column#adjusting-text-size),
but it's an ad hoc solution, of course.

-- 
Joost Kremers
Life has its moments