Hi everybody!
I use
#(define (display-breaks grob)
(if (and (grob::has-interface grob 'paper-column-interface)
(eq? #t (ly:grob-property grob 'non-musical)))
(if (eq? 1 (ly:item-break-dir grob))
(let* ((moment (ly:grob-property grob 'when))(m moment)
(bar (ly:grob-property grob 'rhythmic-location))(b (car bar)))
(format out "~a new system at bar ~a~%" (format-moment m) b)
))
(ly:message "Need NonMusicalPaperColumn grob to determine line
breaks.")))
activated by
\override NonMusicalPaperColumn #'after-line-breaking = #display-breaks
That reliably gives the moment and bar number of an implicit or explicit break,
but I also need to know if this break is a PAGE break.
I assume the information is not available at the time of the callback used
above, but
that isn't a problem as it would be used by a script after lilypond has
finished.
Any idea where/when to get that information from lilypond?
thx,
Knut
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