2016-07-01 20:43 GMT+02:00 Br. Gabriel-Marie | SSPX <brgabr...@sspx.org>:
> Because stanza numbers only appear on the first line. Using instrumentName
> to label verse numbers provides automatic numbering on every line. It
> wasn't my idea, actually, credit for that goes to Thomas Morley a few
> issues ago in Vol 163:issue 95. It works quite well.
>
> On 7/1/2016 1:30 PM, lilypond-user-requ...@gnu.org wrote:
>>
>> Why not use StanzaNumbers instead of instrumentName to label verse
>> numbers?
Meanwhile I tried to make StanzaNumber at every line-begin work, see attached.
Though, it's stacking workarounds, thus pretty expensive.
At least it _is_ possible, even now.
Maybe someone steps in futher improving it.
Cheers,
Harm
\version "2.19.44"
#(define create-stanza-number-grob-engraver
;; puts out a StanzaNumber for every LyricText-grob
(lambda (context)
(let ((stanza (ly:context-property context 'stanza)))
`((acknowledgers
(lyric-syllable-interface .
,(lambda (engraver grob source-engraver)
(let ((new-stanza-grob
(ly:engraver-make-grob engraver 'StanzaNumber '())))
;; set 'id to select them later
(ly:grob-set-property! new-stanza-grob 'id (markup->string stanza))
(ly:grob-set-property! new-stanza-grob 'text stanza)))))))))
#(define (delete-adjacent-duplicates lst)
"Delete all duplicates in a list of strings."
(if (and (not (null? lst)) (every string? lst))
(fold-right (lambda (elem ret)
(if (equal? elem (first ret))
ret
(cons elem ret)))
(list (last lst))
(sort lst string<?))
lst))
#(define (keep-stanza-number-at-line-begin grob)
"Delete all StanzaNumbers not starting a line."
;; If ly:item-break-dir is not zero, a line-break happens.
;; TODO Is this condition sufficient?
(let ((break-dir (ly:item-break-dir grob)))
(if (not (= 0 break-dir))
(let* ((sys (ly:grob-system grob))
(all-elts
(ly:grob-array->list (ly:grob-object sys 'all-elements)))
;; get all StanzaNumbers
(stanzas
(filter
(lambda (e)
(grob::has-interface e 'stanza-number-interface))
all-elts))
;; get all stanza-ids, without duplicates
(stanza-ids
(delete-adjacent-duplicates
(filter
string?
(map
(lambda (x)
(ly:grob-property x 'id))
stanzas))))
;; put StanzaNumbers into sub-lists according to the 'id
(id-selected-stanzas
(map
(lambda (val)
(filter
(lambda (x)
(equal? (ly:grob-property x 'id) val))
stanzas))
stanza-ids)))
;; keep only the first StanzaNumber of every line
;; all other's stencil is set #f
;; TODO there may be a StanzaNumber not catchable this way
(for-each
(lambda (lst)
(if (not (null? (cdr lst)))
(for-each
(lambda (stz)
(ly:grob-set-property! stz 'stencil #f))
(cdr lst))))
id-selected-stanzas)))))
keepLineStartStanzaNumbers =
\layout {
\context {
\Score
\override NonMusicalPaperColumn.after-line-breaking =
#keep-stanza-number-at-line-begin
}
}
numberLyrics =
#(define-scheme-function (nmbr)(number?)
"Return a context-modification setting @code{stanza} and consisting
@code{create-stanza-number-grob-engraver}."
#{
\with {
stanza = \markup \italic #(format #f "~a." nmbr)
\consists #create-stanza-number-grob-engraver
}
#})
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXAMPLE
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\paper { ragged-last-bottom = ##f }
\score {
<<
\new Staff { \key cis \major \repeat unfold 6 { c''4 d'' e'' } }
\new Lyrics \with \numberLyrics 1
\lyricmode {
\repeat unfold 6 { foo -- bar -- buzz }
}
\new Lyrics \with \numberLyrics 2
\lyricmode {
\repeat unfold 6 { very-very-long-syllable bur -- buuuzz }
}
\new Lyrics \with \numberLyrics 3
\lyricmode {
\repeat unfold 6 { fuu -- bla -- blibbb }
}
>>
\header { piece = \markup \rounded-box \fill-line { "Using StanzaNumber" } }
\layout { \keepLineStartStanzaNumbers }
}
\score {
<<
\new Staff { \key cis \major \repeat unfold 6 { c''4 d'' e'' } }
\new Lyrics \with { instrumentName = "1." shortInstrumentName = "1." }
\lyricmode {
\repeat unfold 6 { foo -- bar -- buzz }
}
\new Lyrics \with { instrumentName = "2." shortInstrumentName = "2." }
\lyricmode {
\repeat unfold 6 { very-very-long-syllable bur -- buuuzz }
}
\new Lyrics \with { instrumentName = "3." shortInstrumentName = "3." }
\lyricmode {
\repeat unfold 6 { fuu -- bla -- blibbb }
}
>>
\header { piece = \markup \rounded-box \fill-line { "Using InstrumentName" } }
\layout {
\context {
\Score
\override InstrumentName.X-offset = #'()
\override InstrumentName.font-series = #'bold
\override InstrumentName.font-shape = #'italic
}
\context {
\Lyrics
\revert InstrumentName.font-size
}
}
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