/usr/share/lilypond/2.18.2/scm/define-music-callbacks.scm is in lilypond-data 2.18.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | ;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 1998--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
;;;; Jan Nieuwenhuizen <janneke@gnu.org>
;;;; Neil Puttock <n.puttock@gmail.com>
;;;; Carl Sorensen <c_sorensen@byu.edu>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation, either version 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
;; TODO: should link back into user manual.
(define (mm-rest-child-list music)
"Generate events for multimeasure rests,
to be used by the sequential-iterator"
(let ((location (ly:music-property music 'origin))
(duration (ly:music-property music 'duration)))
(list (make-music 'BarCheck
'origin location)
(make-event-chord (cons (make-music 'MultiMeasureRestEvent
'origin location
'duration duration)
(ly:music-property music 'articulations)))
(make-music 'BarCheck
'origin location))))
(define (make-volta-set music)
(let* ((alts (ly:music-property music 'elements))
(lalts (length alts))
(times (ly:music-property music 'repeat-count)))
(map (lambda (x y)
(make-music
'SequentialMusic
'elements
;; set properties for proper bar numbering
(append
(list (make-music 'AlternativeEvent
'alternative-dir (if (= y 0)
-1
0)
'alternative-increment
(if (= 0 y)
(1+ (- times
lalts))
1)))
(list x)
(if (= y (1- lalts))
(list (make-music 'AlternativeEvent
'alternative-dir 1
'alternative-increment 0))
'()))))
alts
(iota lalts))))
(define (make-ottava-set music)
"Set context properties for an ottava bracket."
(let ((octavation (ly:music-property music 'ottava-number)))
(list (context-spec-music
(make-apply-context
(lambda (context)
(let ((offset (* -7 octavation))
(string (assoc-get octavation '((2 . "15ma")
(1 . "8va")
(0 . #f)
(-1 . "8vb")
(-2 . "15mb")))))
(set! (ly:context-property context 'middleCOffset) offset)
(set! (ly:context-property context 'ottavation) string)
(ly:set-middle-C! context))))
'Staff))))
(define (make-time-signature-set music)
"Set context properties for a time signature."
(let* ((num (ly:music-property music 'numerator))
(den (ly:music-property music 'denominator))
(structure (ly:music-property music 'beat-structure))
(fraction (cons num den)))
(list (descend-to-context
(context-spec-music
(make-apply-context
(lambda (context)
(let* ((time-signature-settings
(ly:context-property context 'timeSignatureSettings))
(my-base-length
(base-length fraction time-signature-settings))
(my-beat-structure
(if (null? structure)
(beat-structure my-base-length
fraction
time-signature-settings)
structure))
(beaming-exception
(beam-exceptions fraction time-signature-settings))
(new-measure-length (ly:make-moment num den)))
(ly:context-set-property!
context 'timeSignatureFraction fraction)
(ly:context-set-property!
context 'baseMoment (ly:make-moment my-base-length))
(ly:context-set-property!
context 'beatStructure my-beat-structure)
(ly:context-set-property!
context 'beamExceptions beaming-exception)
(ly:context-set-property!
context 'measureLength new-measure-length))))
'Timing)
'Score))))
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