RehearsalMark hack

[Simon Bailey]

after delving deeply into the lilypond backend documentation
(especially the scheme functions list) i managed to get my hack working
in three lines:

#----- SNIP LILY CODE HERE -----
#(define (mark-callback grob)
  (if (= (ly:item-break-dir grob) 1)
      (ly:grob-set-property! grob 'extra-offset '(-2.8 . 1))))

\book {
\score {
  \relative c'' {
    \key des \major
    \override Score.RehearsalMark #'before-line-breaking = #mark-callback
    \repeat unfold 4 c2 \mark \default
    \break
    c2 c \mark \default
    c2 c
  }
}\score {
  \relative c'' {
    \key des \major
    \repeat unfold 4 c2 \mark \default
    \break
    c2 c \mark \default
    c2 c
  }
}
}
#----- END LILY CODE HERE ------

gives this output: http://binabik.boldlygoingnowhere.org/r-marks.pdf

the first score block is the one with the tweak applied, the second one
without. is anyone interested in this tweak? if so, i'll add it to lsr
later today

regards,
sb.
-- 
Do not meddle in the affairs of trombonists, for they are subtle and quick to anger.