Hi Kieren,
Am 02.09.24 um 14:37 schrieb Kieren MacMillan:
I’m curious… For years I’ve been using the following snippet for absolute font
sizing:
[... allowGrobCallback and absFontSize ...]
For historians: The original seems to be
https://mail.gnu.org/archive/html/lilypond-user/2013-07/msg00429.html,
written by Jan-Peter Voigt with input from David Kastrup.
I believe I $pon$sored it a decade or so ago
(cf.https://lists.gnu.org/archive/html/lilypond-user/2016-02/msg00023.html).
Questions:
1. What’s the difference between “my” function and this new one?
Your (or Jan-Peter's) function allows setting an absolute font size for
grobs (assuming the grob's stencil depends on a fontsize setting
reflecting "absolute" font size in a meaningful way).
Valentin's proposal of re-defining toplevel-text-handler effectively
adds an \abs-fontsize command in front of all top-level markups (i.e.
\markup ... outside of scores).
My \abs function allows to write \abs \markup ... instead of \markup
\abs-fontsize ... - which is not terribly useful, but was created in
response to Werner's question whether it's possible to create a
replacement for \markup that automatically sets an absolute fontsize.
So while these situations are all connected, they are in fact distinct.
2. Do we need all of these different absolute-fontsize functions? Can’t we have
one that Does All The Right Things™?
I think this question is too general to be meaningful, but it might be
worthwhile to try and make it more well-defined.
Recently I created a score and parts for a symphony, and I really wasn't
happy that changing the global-staff-size for the score also affected
the font sizes for the score header (title etc.). But on the other hand,
there are obviously markups that _should_ scale along with the staff size.
So maybe there should be an internal distinction between markups of one
or the other kind that's not being made yet.
3. Does it make sense to get at least one of these into the main codebase,
instead of having them all floating around in the ether[net]?
At the very least, \allowGrobCallback seems sufficiently general and
elegant for this. But I'm not sure whether there are applications
besides font properties. Or, maybe better yet: The LSR and, maybe, a
Documentation snippet might be the right place for Jan-Peter's function.
Lukas
