Magnetic snap and whiteout on LyricText: warnings

[Simon Albrecht]

Hello everyone,

I don’t know where the “Lyric syllable magnetic snap” snippet is mainly 
stored, I grabbed it from the list years ago and attach it in the 
version that I have, from December 2011 and with links to user list 
archive. I hope I’m not somehow behind time with this, having followed 
the user list only sporadically in the years since.

I have tracked down why I always got warnings about “infinity or nan” in 
every vocal music score I engraved: with the snippet, the last syllable 
of a LyricWord gets a #ly:text-interface::print stencil with 
#empty-markup as text, which results in multiple warnings each time Lily 
tries to apply whiteout to such a syllable. (tiny example below)

This is fixed by, in line 187 of the attached file, replacing 
ly:text-interface::print with point-stencil (an infinitely small 
stencil, IIUC). To avoid misunderstandings: the attached version does 
NOT have the fix applied.

I’m not aware of this snippet being available anywhere except the list 
archives. Surely it would be a good candidate for the LSR and OLL, 
wouldn’t it?

Best, Simon

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.25.5"

\include "lyr-syl-magn-snap.ily"

\layout {
  \context {
    \Lyrics
    \override LyricText.whiteout = 1
  }
}

<<
  { 2 2 }
  \addlyrics { aaaaaaaaaaaaaaaaaaaaaaaaaaa -- bbbbbbbbbbbbbbbbbbbbbbbbb }
>>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

lyr-syl-magn-snap.ly
Description: Text Data