+ (res (memq tag tags)))
+ (not res)))
+ music))
+
+killCues =
+#(define-music-function
+ (parser location music)
+ (ly:music?)
+ (music-map
+ (lambda (mus)
+ (if (string? (ly:music-property mus 'quoted-music-name))
+ (ly:music-property mus 'element)
+ mus)) music))
+
+label =
+#(define-music-function (parser location label) (symbol?)
+ (_i "Place a bookmarking label, either at top-level or inside music.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'page-label label
+ 'elements (list (make-music 'LabelEvent
+ 'page-label label))))
+
+makeClusters =
+#(define-music-function
+ (parser location arg) (ly:music?)
+ (music-map note-to-cluster arg))
+
+musicMap =
+#(define-music-function (parser location proc mus) (procedure? ly:music?)
+ (music-map proc mus))
+
+
+
+oldaddlyrics =
+#(define-music-function (parser location music lyrics) (ly:music? ly:music?)
+
+ (make-music 'OldLyricCombineMusic
+ 'origin location
+ 'elements (list music lyrics)))
+
+
+overrideProperty =
+#(define-music-function (parser location name property value)
+ (string? symbol? scheme?)
+
+
+ (_i "Set @var{property} to @var{value} in all grobs named @var{name}.
+The @var{name} argument is a string of the form @code{\"Context.GrobName\"}
+or @code{\"GrobName\"}")
+
+ (let*
+ ((name-components (string-split name #\.))
+ (context-name 'Bottom)
+ (grob-name #f))
+
+ (if (> 2 (length name-components))
+ (set! grob-name (string->symbol (car name-components)))
+ (begin
+ (set! grob-name (string->symbol (list-ref name-components 1)))
+ (set! context-name (string->symbol (list-ref name-components 0)))))
+
+ (make-music 'ApplyOutputEvent
+ 'origin location
+ 'context-type context-name
+ 'procedure
+ (lambda (grob orig-context context)
+ (if (equal?
+ (cdr (assoc 'name (ly:grob-property grob 'meta)))
+ grob-name)
+ (set! (ly:grob-property grob property) value))))))
+
+%% These are music functions (iso music indentifiers), because music identifiers
+%% are not allowed at top-level.
+pageBreak =
+#(define-music-function (location parser) ()
+ (_i "Force a page break. May be used at toplevel (ie between scores or
+markups), or inside a score.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'line-break-permission 'force
+ 'page-break-permission 'force
+ 'elements (list (make-music 'LineBreakEvent
+ 'break-permission 'force)
+ (make-music 'PageBreakEvent
+ 'break-permission 'force))))
+
+noPageBreak =
+#(define-music-function (location parser) ()
+ (_i "Forbid a page break. May be used at toplevel (ie between scores or
+markups), or inside a score.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'page-break-permission 'forbid
+ 'elements (list (make-music 'PageBreakEvent
+ 'break-permission '()))))
+
+pageTurn =
+#(define-music-function (location parser) ()
+ (_i "Force a page turn between two scores or top-level markups.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'line-break-permission 'force
+ 'page-break-permission 'force
+ 'page-turn-permission 'force
+ 'elements (list (make-music 'LineBreakEvent
+ 'break-permission 'force)
+ (make-music 'PageBreakEvent
+ 'break-permission 'force)
+ (make-music 'PageTurnEvent
+ 'break-permission 'force))))
+
+noPageTurn =
+#(define-music-function (location parser) ()
+ (_i "Forbid a page turn. May be used at toplevel (ie between scores or
+markups), or inside a score.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'page-turn-permission 'forbid
+ 'elements (list (make-music 'PageTurnEvent
+ 'break-permission '()))))
+
+allowPageTurn =
+#(define-music-function (location parser) ()
+ (_i "Allow a page turn. May be used at toplevel (ie between scores or
+markups), or inside a score.")
+ (make-music 'EventChord
+ 'page-marker #t
+ 'page-turn-permission 'allow
+ 'elements (list (make-music 'PageTurnEvent
+ 'break-permission 'allow))))
+
+%% Todo:
+%% doing
+%% define-music-function in a .scm causes crash.
+
+octaveCheck =
+#(define-music-function (parser location pitch-note) (ly:music?)
+ (_i "octave check")
+
+ (make-music 'RelativeOctaveCheck
+ 'origin location
+ 'pitch (pitch-of-note pitch-note)
+ ))
+
+ottava = #(define-music-function (parser location octave) (number?)
+ (_i "set the octavation ")
+ (make-ottava-set octave))
+
+partcombine =
+#(define-music-function (parser location part1 part2) (ly:music? ly:music?)
+ (make-part-combine-music parser
+ (list part1 part2)))
+
+
+pitchedTrill =
+#(define-music-function
+ (parser location main-note secondary-note)
+ (ly:music? ly:music?)
+ (let*
+ ((get-notes (lambda (ev-chord)
+ (filter
+ (lambda (m) (eq? 'NoteEvent (ly:music-property m 'name)))
+ (ly:music-property ev-chord 'elements))))
+ (sec-note-events (get-notes secondary-note))
+ (trill-events (filter (lambda (m) (music-has-type m 'trill-span-event))
+ (ly:music-property main-note 'elements))))
+
+ (if (pair? sec-note-events)
+ (begin
+ (let*
+ ((trill-pitch (ly:music-property (car sec-note-events) 'pitch))
+ (forced (ly:music-property (car sec-note-events ) 'force-accidental)))
+
+ (if (ly:pitch? trill-pitch)
+ (for-each (lambda (m) (ly:music-set-property! m 'pitch trill-pitch))
+ trill-events)
+ (begin
+ (ly:warning (_ "Second argument of \\pitchedTrill should be single note: "))
+ (display sec-note-events)))
+
+ (if (eq? forced #t)
+ (for-each (lambda (m) (ly:music-set-property! m 'force-accidental forced))
+ trill-events)))))
+ main-note))
+
+
+
+%% for lambda*
+#(use-modules (ice-9 optargs))
+
+parallelMusic =
+#(define-music-function (parser location voice-ids music) (list? ly:music?)
+ (_i "Define parallel music sequences, separated by '|' (bar check signs),
+and assign them to the identifiers provided in @var{voice-ids}.
+
+@var{voice-ids}: a list of music identifiers (symbols containing only letters)
+
+@var{music}: a music sequence, containing BarChecks as limiting expressions.
+
+Example:
+
+@verbatim
+ \\parallelMusic #'(A B C) {
+ c c | d d | e e |
+ d d | e e | f f |
+ }
+<==>
+ A = { c c | d d | }
+ B = { d d | e e | }
+ C = { e e | f f | }
+@end verbatim
+")
+ (let* ((voices (apply circular-list (make-list (length voice-ids) (list))))
+ (current-voices voices)
+ (current-sequence (list)))
+ ;;
+ ;; utilities
+ (define (push-music m)
+ "Push the music expression into the current sequence"
+ (set! current-sequence (cons m current-sequence)))
+ (define (change-voice)
+ "Stores the previously built sequence into the current voice and
+ change to the following voice."
+ (list-set! current-voices 0 (cons (make-music 'SequentialMusic
+ 'elements (reverse! current-sequence))
+ (car current-voices)))
+ (set! current-sequence (list))
+ (set! current-voices (cdr current-voices)))
+ (define (bar-check? m)
+ "Checks whether m is a bar check."
+ (eq? (ly:music-property m 'name) 'BarCheck))
+ (define (music-origin music)
+ "Recursively search an origin location stored in music."
+ (cond ((null? music) #f)
+ ((not (null? (ly:music-property music 'origin)))
+ (ly:music-property music 'origin))
+ (else (or (music-origin (ly:music-property music 'element))
+ (let ((origins (remove not (map music-origin
+ (ly:music-property music 'elements)))))
+ (and (not (null? origins)) (car origins)))))))
+ ;;
+ ;; first, split the music and fill in voices
+ (map-in-order (lambda (m)
+ (push-music m)
+ (if (bar-check? m) (change-voice)))
+ (ly:music-property music 'elements))
+ (if (not (null? current-sequence)) (change-voice))
+ ;; un-circularize `voices' and reorder the voices
+ (set! voices (map-in-order (lambda (dummy seqs)
+ (reverse! seqs))
+ voice-ids voices))
+ ;;
+ ;; set origin location of each sequence in each voice
+ ;; for better type error tracking
+ (for-each (lambda (voice)
+ (for-each (lambda (seq)
+ (set! (ly:music-property seq 'origin)
+ (or (music-origin seq) location)))
+ voice))
+ voices)
+ ;;
+ ;; check sequence length
+ (apply for-each (lambda* (#:rest seqs)
+ (let ((moment-reference (ly:music-length (car seqs))))
+ (for-each (lambda (seq moment)
+ (if (not (equal? moment moment-reference))
+ (ly:music-message seq
+ "Bars in parallel music don't have the same length")))
+ seqs (map-in-order ly:music-length seqs))))
+ voices)
+ ;;
+ ;; bind voice identifiers to the voices
+ (map (lambda (voice-id voice)
+ (ly:parser-define! parser voice-id
+ (make-music 'SequentialMusic
+ 'origin location
+ 'elements voice)))
+ voice-ids voices))
+ ;; Return an empty sequence. this function is actually a "void" function.
+ (make-music 'SequentialMusic 'void #t))
+
+
+
+parenthesize =
+#(define-music-function (parser loc arg) (ly:music?)
+ (_i "Tag @var{arg} to be parenthesized.")
+
+ (if (memq 'event-chord (ly:music-property arg 'types))
+ ; arg is an EventChord -> set the parenthesize property on all child notes and rests
+ (map
+ (lambda (ev)
+ (if (or (memq 'note-event (ly:music-property ev 'types))
+ (memq 'rest-event (ly:music-property ev 'types)))
+ (set! (ly:music-property ev 'parenthesize) #t)))
+ (ly:music-property arg 'elements))
+ ; No chord, simply set property for this expression:
+ (set! (ly:music-property arg 'parenthesize) #t))
+ arg)