Conditional breaks fail at grace notes

[mrtnnbr]

MWE:

`
\version "2.19.83"

\include "oll-core/package.ily"

\loadPackage \with {
modules = conditional-breaks
}
page-layout

\registerBreakSet fail
\setBreaks fail line-breaks #'(2 (3 0)))

\applyConditionalBreaks fail

{
\repeat unfold 3 { \acciaccatura d''8 c''1 }
}
`

I'll see if I can investigate the issue further, but I'll probably busy with other stuff the next few days.

[uliska]

Where do you want the break to happen, before or after the acciaccatura? To address grace notes with the edition-engraver you have to subtract the duration like #(ly:make-moment 0 4 -1 8) (I think). I'm not sure if it works, though, and how to catch that with page-layout's syntax. -- Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.

[mrtnnbr]

The break should be before the acciaccatura. I already tried #(ly:make-moment ...), but that actually does clash with the way page-layout seems to expect the input. (I was also mildly surprised that #'(2) and #'((2 0)) are having a different effect.)

Curiously, using an explicit use of the edition engraver does work, but has some weird interactions with the conditional-breaks module. I expanded the example a bit:

\version "2.19.83"

\include "oll-core/package.ily"

\loadPackage \with {
  modules = conditional-breaks
}
page-layout

\registerBreakSet fail
\setBreaks fail line-breaks #'((3 0) 4)

\applyConditionalBreaks fail

\consistToContexts #edition-engraver Score.Staff.Voice

\addEdition workaround

\editionMod workaround 2 #(ly:make-moment 0 4 -1 8) test.Score \break
\editionMod workaround 2 #(ly:make-moment 0 4 -1 8) breaks.Score \break

\score {
  {
    \repeat unfold 6 { \grace d''8 c''2 }

    c''2 c''2
  }

  \layout {
    \context {
      \Score
      \editionID ##f breaks
    }
  }
}

\score {
  {
    \repeat unfold 6 { \grace d''8 c''2 }

    c''2 c''2
  }

  \layout {
    \context {
      \Score
      \editionID ##f test
    }
  }
}