Wish: graceStyle music function

[Simon Albrecht]

Hi everyone,

once again I’m grappling with the issue of \afterGrace. I find the 
spacing implications of inserting actual grace notes with a spacer rest 
after pretty much impossible to work with [1], so I tried using normally 
timed notes, tweaking their size and stem direction to match grace 
notes. But it gets ridiculous, since you’d need to manually shorten 
stems/reposition beams as well.

In conclusion, I think it would be best to have a graceStyle music 
function that will retain the normal timing but mimick the appearance of 
grace notes. I imagine this could be useful for other contexts as well 
(Chopin-style flourishes, cadenzas, arbitrary embellishments…). Myself I 
might have to delve deep into the C++ implementation of grace notes to 
figure out what might not actually be complicated in terms of 
implementation—does someone have the knowledge and be willing to help me 
out?

Thanks,
Simon


[1] Having a globally defined afterGraceFraction proved difficult for 
polyphonic situations, so I switched to manual scaling of durations. 
Normally there shouldn’t be any extra space after, so I try the 
equivalent of reducing afterGraceFraction, but that easily causes Lily 
to print the grace notes with smaller note values (apparently, she won’t 
allow grace notes with a nominal value larger than the duration of the 
main note…).