Cross-"fertilization" between Dynamics w/ Lyrics and Keep_alive_together_engraver

[Rutger Hofman]

Dear list,

I ran into a situation where using the Keep_alive_together_engraver, 
with VerticalAxisGroup.remove-layer settings, gives unexpected results 
in horizontal spacing for a Dynamics context with \accept-ed Lyrics. I 
very much want to use this configuration, and have correct horizontal 
spacing.

The attached pdf (v.2.19.83) shows an upper score without either 
Keep_alive_together_engraver or remove-layer settings, which gives 
expected (correct) horizontal spacing. The lower score shows that, for 
Keep_alive_together_engraver and remove-layer settings, the horizontal 
spacing of the notes is (incorrectly) expanded to fit the lyrics 
syllables to one note.

What setting can I apply to get correct horizontal spacing in the second 
case? Or, if this is a bug, is there a workaround (which should work in 
scores with multiple MarkLines and tens of instrument staves)?

Rationale: I use this Lyrics tric in my MarkLines to create a spanner 
with the spanner elements at specific times, and also at a fixed 
vertical offset. I cannot use David Nalesnik's textSpannerInnerTexts 
because their spacing of the words doesn't depend on the musical time. I 
cannot use multiple TextSpanners, because (at least in parts with few or 
no notes) the vertical offset of the texts is not constant: I saw 
situations where they are stacked 3 high.

Greetings,

Rutger

timed-spanner.ly
Description: timed-spanner.ly

timed-spanner.pdf
Description: timed-spanner.pdf