/usr/share/lilypond/2.14.2/scm/music-functions.scm is in lilypond-data 2.14.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;;;;
;;;; Copyright (C) 1998--2011 Jan Nieuwenhuizen <janneke@gnu.org>
;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
;;;;
;;;; 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/>.
;; (use-modules (ice-9 optargs))
;;; ly:music-property with setter
;;; (ly:music-property my-music 'elements)
;;; ==> the 'elements property
;;; (set! (ly:music-property my-music 'elements) value)
;;; ==> set the 'elements property and return it
(define-public ly:music-property
(make-procedure-with-setter ly:music-property
ly:music-set-property!))
(define-safe-public (music-is-of-type? mus type)
"Does @code{mus} belong to the music class @code{type}?"
(memq type (ly:music-property mus 'types)))
;; TODO move this
(define-public ly:grob-property
(make-procedure-with-setter ly:grob-property
ly:grob-set-property!))
(define-public ly:grob-object
(make-procedure-with-setter ly:grob-object
ly:grob-set-object!))
(define-public ly:grob-parent
(make-procedure-with-setter ly:grob-parent
ly:grob-set-parent!))
(define-public ly:prob-property
(make-procedure-with-setter ly:prob-property
ly:prob-set-property!))
(define-public ly:context-property
(make-procedure-with-setter ly:context-property
ly:context-set-property!))
(define-public (music-map function music)
"Apply @var{function} to @var{music} and all of the music it contains.
First it recurses over the children, then the function is applied to
@var{music}."
(let ((es (ly:music-property music 'elements))
(e (ly:music-property music 'element)))
(set! (ly:music-property music 'elements)
(map (lambda (y) (music-map function y)) es))
(if (ly:music? e)
(set! (ly:music-property music 'element)
(music-map function e)))
(function music)))
(define-public (music-filter pred? music)
"Filter out music expressions that do not satisfy @var{pred?}."
(define (inner-music-filter pred? music)
"Recursive function."
(let* ((es (ly:music-property music 'elements))
(e (ly:music-property music 'element))
(as (ly:music-property music 'articulations))
(filtered-as (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) as)))
(filtered-e (if (ly:music? e)
(inner-music-filter pred? e)
e))
(filtered-es (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) es))))
(set! (ly:music-property music 'element) filtered-e)
(set! (ly:music-property music 'elements) filtered-es)
(set! (ly:music-property music 'articulations) filtered-as)
;; if filtering emptied the expression, we remove it completely.
(if (or (not (pred? music))
(and (eq? filtered-es '()) (not (ly:music? e))
(or (not (eq? es '()))
(ly:music? e))))
(set! music '()))
music))
(set! music (inner-music-filter pred? music))
(if (ly:music? music)
music
(make-music 'Music))) ;must return music.
(define-public (display-music music)
"Display music, not done with @code{music-map} for clarity of
presentation."
(display music)
(display ": { ")
(let ((es (ly:music-property music 'elements))
(e (ly:music-property music 'element)))
(display (ly:music-mutable-properties music))
(if (pair? es)
(begin (display "\nElements: {\n")
(map display-music es)
(display "}\n")))
(if (ly:music? e)
(begin
(display "\nChild:")
(display-music e))))
(display " }\n")
music)
;;;
;;; A scheme music pretty printer
;;;
(define (markup-expression->make-markup markup-expression)
"Transform `markup-expression' into an equivalent, hopefuly readable, scheme expression.
For instance,
\\markup \\bold \\italic hello
==>
(markup #:line (#:bold (#:italic (#:simple \"hello\"))))"
(define (proc->command-keyword proc)
"Return a keyword, eg. `#:bold', from the `proc' function, eg. #<procedure bold-markup (layout props arg)>"
(let ((cmd-markup (symbol->string (procedure-name proc))))
(symbol->keyword (string->symbol (substring cmd-markup 0 (- (string-length cmd-markup)
(string-length "-markup")))))))
(define (transform-arg arg)
(cond ((and (pair? arg) (markup? (car arg))) ;; a markup list
(apply append (map inner-markup->make-markup arg)))
((and (not (string? arg)) (markup? arg)) ;; a markup
(inner-markup->make-markup arg))
(else ;; scheme arg
(music->make-music arg))))
(define (inner-markup->make-markup mrkup)
(if (string? mrkup)
`(#:simple ,mrkup)
(let ((cmd (proc->command-keyword (car mrkup)))
(args (map transform-arg (cdr mrkup))))
`(,cmd ,@args))))
;; body:
(if (string? markup-expression)
markup-expression
`(markup ,@(inner-markup->make-markup markup-expression))))
(define-public (music->make-music obj)
"Generate an expression that, once evaluated, may return an object
equivalent to @var{obj}, that is, for a music expression, a
@code{(make-music ...)} form."
(cond (;; markup expression
(markup? obj)
(markup-expression->make-markup obj))
(;; music expression
(ly:music? obj)
`(make-music
',(ly:music-property obj 'name)
,@(apply append (map (lambda (prop)
`(',(car prop)
,(music->make-music (cdr prop))))
(remove (lambda (prop)
(eqv? (car prop) 'origin))
(ly:music-mutable-properties obj))))))
(;; moment
(ly:moment? obj)
`(ly:make-moment ,(ly:moment-main-numerator obj)
,(ly:moment-main-denominator obj)
,(ly:moment-grace-numerator obj)
,(ly:moment-grace-denominator obj)))
(;; note duration
(ly:duration? obj)
`(ly:make-duration ,(ly:duration-log obj)
,(ly:duration-dot-count obj)
,(car (ly:duration-factor obj))
,(cdr (ly:duration-factor obj))))
(;; note pitch
(ly:pitch? obj)
`(ly:make-pitch ,(ly:pitch-octave obj)
,(ly:pitch-notename obj)
,(ly:pitch-alteration obj)))
(;; scheme procedure
(procedure? obj)
(or (procedure-name obj) obj))
(;; a symbol (avoid having an unquoted symbol)
(symbol? obj)
`',obj)
(;; an empty list (avoid having an unquoted empty list)
(null? obj)
`'())
(;; a proper list
(list? obj)
`(list ,@(map music->make-music obj)))
(;; a pair
(pair? obj)
`(cons ,(music->make-music (car obj))
,(music->make-music (cdr obj))))
(else
obj)))
(use-modules (ice-9 pretty-print))
(define*-public (display-scheme-music obj #:optional (port (current-output-port)))
"Displays `obj', typically a music expression, in a friendly fashion,
which often can be read back in order to generate an equivalent expression.
Returns `obj'.
"
(pretty-print (music->make-music obj) port)
(newline)
obj)
;;;
;;; Scheme music expression --> Lily-syntax-using string translator
;;;
(use-modules (srfi srfi-39)
(scm display-lily))
(define*-public (display-lily-music expr parser #:key force-duration)
"Display the music expression using LilyPond syntax"
(memoize-clef-names supported-clefs)
(parameterize ((*indent* 0)
(*previous-duration* (ly:make-duration 2))
(*force-duration* force-duration))
(display (music->lily-string expr parser))
(newline)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-public (shift-one-duration-log music shift dot)
"Add @var{shift} to @code{duration-log} of @code{'duration} in
@var{music} and optionally @var{dot} to any note encountered. This
scales the music up by a factor `2^@var{shift} * (2 - (1/2)^@var{dot})'."
(let ((d (ly:music-property music 'duration)))
(if (ly:duration? d)
(let* ((cp (ly:duration-factor d))
(nd (ly:make-duration (+ shift (ly:duration-log d))
(+ dot (ly:duration-dot-count d))
(car cp)
(cdr cp))))
(set! (ly:music-property music 'duration) nd)))
music))
(define-public (shift-duration-log music shift dot)
(music-map (lambda (x) (shift-one-duration-log x shift dot))
music))
(define-public (make-repeat name times main alts)
"Create a repeat music expression, with all properties initialized
properly."
(define (first-note-duration music)
"Finds the duration of the first NoteEvent by searching depth-first
through MUSIC."
(if (memq 'note-event (ly:music-property music 'types))
(ly:music-property music 'duration)
(let loop ((elts (if (ly:music? (ly:music-property music 'element))
(list (ly:music-property music 'element))
(ly:music-property music 'elements))))
(and (pair? elts)
(let ((dur (first-note-duration (car elts))))
(if (ly:duration? dur)
dur
(loop (cdr elts))))))))
(let ((talts (if (< times (length alts))
(begin
(ly:warning (_ "More alternatives than repeats. Junking excess alternatives"))
(take alts times))
alts))
(r (make-repeated-music name)))
(set! (ly:music-property r 'element) main)
(set! (ly:music-property r 'repeat-count) (max times 1))
(set! (ly:music-property r 'elements) talts)
(if (and (equal? name "tremolo")
(or (pair? (ly:music-property main 'elements))
(ly:music? (ly:music-property main 'element))))
;; This works for single-note and multi-note tremolos!
(let* ((children (if (music-is-of-type? main 'sequential-music)
;; \repeat tremolo n { ... }
(length (extract-named-music main 'EventChord))
;; \repeat tremolo n c4
1))
;; # of dots is equal to the 1 in bitwise representation (minus 1)!
(dots (1- (logcount (* times children))))
;; The remaining missing multiplicator to scale the notes by
;; times * children
(mult (/ (* times children (ash 1 dots)) (1- (ash 2 dots))))
(shift (- (ly:intlog2 (floor mult))))
(note-duration (first-note-duration r))
(duration-log (if (ly:duration? note-duration)
(ly:duration-log note-duration)
1))
(tremolo-type (ash 1 duration-log)))
(set! (ly:music-property r 'tremolo-type) tremolo-type)
(if (not (integer? mult))
(ly:warning (_ "invalid tremolo repeat count: ~a") times))
;; Adjust the time of the notes
(ly:music-compress r (ly:make-moment 1 children))
;; Adjust the displayed note durations
(shift-duration-log r shift dots))
r)))
(define (calc-repeat-slash-count music)
"Given the child-list @var{music} in @code{PercentRepeatMusic},
calculate the number of slashes based on the durations. Returns @code{0}
if durations in @var{music} vary, allowing slash beats and double-percent
beats to be distinguished."
(let* ((durs (map (lambda (elt)
(duration-of-note elt))
(extract-named-music music 'EventChord)))
(first-dur (car durs)))
(if (every (lambda (d) (equal? d first-dur)) durs)
(max (- (ly:duration-log first-dur) 2) 1)
0)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; clusters.
(define-public (note-to-cluster music)
"Replace @code{NoteEvents} by @code{ClusterNoteEvents}."
(if (eq? (ly:music-property music 'name) 'NoteEvent)
(make-music 'ClusterNoteEvent
'pitch (ly:music-property music 'pitch)
'duration (ly:music-property music 'duration))
music))
(define-public (notes-to-clusters music)
(music-map note-to-cluster music))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; repeats.
(define-public (unfold-repeats music)
"Replace all repeats with unfolded repeats."
(let ((es (ly:music-property music 'elements))
(e (ly:music-property music 'element)))
(if (memq 'repeated-music (ly:music-property music 'types))
(let* ((props (ly:music-mutable-properties music))
(old-name (ly:music-property music 'name))
(flattened (flatten-alist props)))
(set! music (apply make-music (cons 'UnfoldedRepeatedMusic
flattened)))
(if (equal? old-name 'TremoloRepeatedMusic)
(let* ((seq-arg? (memq 'sequential-music
(ly:music-property e 'types)))
(count (ly:music-property music 'repeat-count))
(dot-shift (if (= 0 (remainder count 3))
-1 0))
(child-count (if seq-arg?
(length (ly:music-property e 'elements))
0)))
(if (= 0 -1)
(set! count (* 2 (quotient count 3))))
(shift-duration-log music (+ (if (= 2 child-count)
1 0)
(ly:intlog2 count)) dot-shift)
(if seq-arg?
(ly:music-compress e (ly:make-moment child-count 1)))))))
(if (pair? es)
(set! (ly:music-property music 'elements)
(map unfold-repeats es)))
(if (ly:music? e)
(set! (ly:music-property music 'element)
(unfold-repeats e)))
music))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; property setting music objs.
(define-public (make-grob-property-set grob gprop val)
"Make a @code{Music} expression that sets @var{gprop} to @var{val} in
@var{grob}. Does a pop first, i.e., this is not an override."
(make-music 'OverrideProperty
'symbol grob
'grob-property gprop
'grob-value val
'pop-first #t))
(define-public (make-grob-property-override grob gprop val)
"Make a @code{Music} expression that overrides @var{gprop} to @var{val}
in @var{grob}."
(make-music 'OverrideProperty
'symbol grob
'grob-property gprop
'grob-value val))
(define-public (make-grob-property-revert grob gprop)
"Revert the grob property @var{gprop} for @var{grob}."
(make-music 'RevertProperty
'symbol grob
'grob-property gprop))
(define direction-polyphonic-grobs
'(DotColumn
Dots
Fingering
LaissezVibrerTie
PhrasingSlur
RepeatTie
Rest
Script
Slur
Stem
TextScript
Tie))
(define-safe-public (make-voice-props-set n)
(make-sequential-music
(append
(map (lambda (x) (make-grob-property-set x 'direction
(if (odd? n) -1 1)))
direction-polyphonic-grobs)
(list
(make-property-set 'graceSettings
;; TODO: take this from voicedGraceSettings or similar.
'((Voice Stem font-size -3)
(Voice NoteHead font-size -3)
(Voice TabNoteHead font-size -4)
(Voice Dots font-size -3)
(Voice Stem length-fraction 0.8)
(Voice Stem no-stem-extend #t)
(Voice Beam beam-thickness 0.384)
(Voice Beam length-fraction 0.8)
(Voice Accidental font-size -4)
(Voice AccidentalCautionary font-size -4)
(Voice Script font-size -3)
(Voice Fingering font-size -8)
(Voice StringNumber font-size -8)))
(make-grob-property-set 'NoteColumn 'horizontal-shift (quotient n 2))
(make-grob-property-set 'MultiMeasureRest 'staff-position (if (odd? n) -4 4))))))
(define-safe-public (make-voice-props-revert)
(make-sequential-music
(append
(map (lambda (x) (make-grob-property-revert x 'direction))
direction-polyphonic-grobs)
(list (make-property-unset 'graceSettings)
(make-grob-property-revert 'NoteColumn 'horizontal-shift)
(make-grob-property-revert 'MultiMeasureRest 'staff-position)))))
(define-safe-public (context-spec-music m context #:optional id)
"Add \\context CONTEXT = ID to M."
(let ((cm (make-music 'ContextSpeccedMusic
'element m
'context-type context)))
(if (string? id)
(set! (ly:music-property cm 'context-id) id))
cm))
(define-public (descend-to-context m context)
"Like @code{context-spec-music}, but only descending."
(let ((cm (context-spec-music m context)))
(ly:music-set-property! cm 'descend-only #t)
cm))
(define-public (make-non-relative-music mus)
(make-music 'UnrelativableMusic
'element mus))
(define-public (make-apply-context func)
(make-music 'ApplyContext
'procedure func))
(define-public (make-sequential-music elts)
(make-music 'SequentialMusic
'elements elts))
(define-public (make-simultaneous-music elts)
(make-music 'SimultaneousMusic
'elements elts))
(define-safe-public (make-event-chord elts)
(make-music 'EventChord
'elements elts))
(define-public (make-skip-music dur)
(make-music 'SkipMusic
'duration dur))
(define-public (make-grace-music music)
(make-music 'GraceMusic
'element music))
;;;;;;;;;;;;;;;;
;; mmrest
(define-public (make-multi-measure-rest duration location)
(make-music 'MultiMeasureRestMusic
'origin location
'duration duration))
(define-public (make-property-set sym val)
(make-music 'PropertySet
'symbol sym
'value val))
(define-public (make-property-unset sym)
(make-music 'PropertyUnset
'symbol sym))
;;; Need to keep this definition for \time calls from parser
(define-public (make-time-signature-set num den)
"Set properties for time signature @var{num}/@var{den}."
(make-music 'TimeSignatureMusic
'numerator num
'denominator den
'beat-structure '()))
;;; Used for calls that include beat-grouping setting
(define-public (set-time-signature num den . rest)
"Set properties for time signature @var{num}/@var{den}.
If @var{rest} is present, it is used to set @code{beatStructure}."
(ly:export
(make-music 'TimeSignatureMusic
'numerator num
'denominator den
'beat-structure (if (null? rest) rest (car rest)))))
(define-safe-public (make-articulation name)
(make-music 'ArticulationEvent
'articulation-type name))
(define-public (make-lyric-event string duration)
(make-music 'LyricEvent
'duration duration
'text string))
(define-safe-public (make-span-event type span-dir)
(make-music type
'span-direction span-dir))
(define-public (override-head-style heads style)
"Override style for @var{heads} to @var{style}."
(make-sequential-music
(if (pair? heads)
(map (lambda (h)
(make-grob-property-override h 'style style))
heads)
(list (make-grob-property-override heads 'style style)))))
(define-public (revert-head-style heads)
"Revert style for @var{heads}."
(make-sequential-music
(if (pair? heads)
(map (lambda (h)
(make-grob-property-revert h 'style))
heads)
(list (make-grob-property-revert heads 'style)))))
(define-public (style-note-heads heads style music)
"Set @var{style} for all @var{heads} in @var{music}. Works both
inside of and outside of chord construct."
;; are we inside a <...>?
(if (eq? (ly:music-property music 'name) 'NoteEvent)
;; yes -> use a tweak
(begin
(set! (ly:music-property music 'tweaks)
(acons 'style style (ly:music-property music 'tweaks)))
music)
;; not in <...>, so use overrides
(make-sequential-music
(list
(override-head-style heads style)
music
(revert-head-style heads)))))
(define-public (set-mus-properties! m alist)
"Set all of @var{alist} as properties of @var{m}."
(if (pair? alist)
(begin
(set! (ly:music-property m (caar alist)) (cdar alist))
(set-mus-properties! m (cdr alist)))))
(define-public (music-separator? m)
"Is @var{m} a separator?"
(let ((ts (ly:music-property m 'types)))
(memq 'separator ts)))
;;; splitting chords into voices.
(define (voicify-list lst number)
"Make a list of Musics.
voicify-list :: [ [Music ] ] -> number -> [Music]
LST is a list music-lists.
NUMBER is 0-base, i.e., Voice=1 (upstems) has number 0.
"
(if (null? lst)
'()
(cons (context-spec-music
(make-sequential-music
(list (make-voice-props-set number)
(make-simultaneous-music (car lst))))
'Bottom (number->string (1+ number)))
(voicify-list (cdr lst) (1+ number)))))
(define (voicify-chord ch)
"Split the parts of a chord into different Voices using separator"
(let ((es (ly:music-property ch 'elements)))
(set! (ly:music-property ch 'elements)
(voicify-list (split-list-by-separator es music-separator?) 0))
ch))
(define-public (voicify-music m)
"Recursively split chords that are separated with @code{\\\\}."
(if (not (ly:music? m))
(ly:error (_ "music expected: ~S") m))
(let ((es (ly:music-property m 'elements))
(e (ly:music-property m 'element)))
(if (pair? es)
(set! (ly:music-property m 'elements) (map voicify-music es)))
(if (ly:music? e)
(set! (ly:music-property m 'element) (voicify-music e)))
(if (and (equal? (ly:music-property m 'name) 'SimultaneousMusic)
(reduce (lambda (x y ) (or x y)) #f (map music-separator? es)))
(set! m (context-spec-music (voicify-chord m) 'Staff)))
m))
(define-public (empty-music)
(ly:export (make-music 'Music)))
;; Make a function that checks score element for being of a specific type.
(define-public (make-type-checker symbol)
(lambda (elt)
(grob::has-interface elt symbol)))
(define-public ((outputproperty-compatibility func sym val) grob g-context ao-context)
(if (func grob)
(set! (ly:grob-property grob sym) val)))
(define-public ((set-output-property grob-name symbol val) grob grob-c context)
"Usage example:
@code{\\applyoutput #(set-output-property 'Clef 'extra-offset '(0 . 1))}"
(let ((meta (ly:grob-property grob 'meta)))
(if (equal? (assoc-get 'name meta) grob-name)
(set! (ly:grob-property grob symbol) val))))
;;
(define-public (smart-bar-check n)
"Make a bar check that checks for a specific bar number."
(let ((m (make-music 'ApplyContext)))
(define (checker tr)
(let* ((bn (ly:context-property tr 'currentBarNumber)))
(or (= bn n)
(ly:error
;; FIXME: uncomprehensable message
(_ "Bar check failed. Expect to be at ~a, instead at ~a")
n bn))))
(set! (ly:music-property m 'procedure) checker)
m))
(define-public (skip->rest mus)
"Replace @var{mus} by @code{RestEvent} of the same duration if it is a
@code{SkipEvent}. Useful for extracting parts from crowded scores."
(if (memq (ly:music-property mus 'name) '(SkipEvent SkipMusic))
(make-music 'RestEvent 'duration (ly:music-property mus 'duration))
mus))
(define-public (music-has-type music type)
(memq type (ly:music-property music 'types)))
(define-public (music-clone music)
(define (alist->args alist acc)
(if (null? alist)
acc
(alist->args (cdr alist)
(cons (caar alist) (cons (cdar alist) acc)))))
(apply
make-music
(ly:music-property music 'name)
(alist->args (ly:music-mutable-properties music) '())))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; warn for bare chords at start.
(define-public (ly:music-message music msg)
(let ((ip (ly:music-property music 'origin)))
(if (ly:input-location? ip)
(ly:input-message ip msg)
(ly:warning msg))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; setting stuff for grace context.
;;
(define (vector-extend v x)
"Make a new vector consisting of V, with X added to the end."
(let* ((n (vector-length v))
(nv (make-vector (+ n 1) '())))
(vector-move-left! v 0 n nv 0)
(vector-set! nv n x)
nv))
(define (vector-map f v)
"Map F over V. This function returns nothing."
(do ((n (vector-length v))
(i 0 (+ i 1)))
((>= i n))
(f (vector-ref v i))))
(define (vector-reverse-map f v)
"Map F over V, N to 0 order. This function returns nothing."
(do ((i (- (vector-length v) 1) (- i 1)))
((< i 0))
(f (vector-ref v i))))
(define-public (add-grace-property context-name grob sym val)
"Set @var{sym}=@var{val} for @var{grob} in @var{context-name}."
(define (set-prop context)
(let* ((where (ly:context-property-where-defined context 'graceSettings))
(current (ly:context-property where 'graceSettings))
(new-settings (append current
(list (list context-name grob sym val)))))
(ly:context-set-property! where 'graceSettings new-settings)))
(ly:export (context-spec-music (make-apply-context set-prop) 'Voice)))
(define-public (remove-grace-property context-name grob sym)
"Remove all @var{sym} for @var{grob} in @var{context-name}."
(define (sym-grob-context? property sym grob context-name)
(and (eq? (car property) context-name)
(eq? (cadr property) grob)
(eq? (caddr property) sym)))
(define (delete-prop context)
(let* ((where (ly:context-property-where-defined context 'graceSettings))
(current (ly:context-property where 'graceSettings))
(prop-settings (filter
(lambda(x) (sym-grob-context? x sym grob context-name))
current))
(new-settings current))
(for-each (lambda(x)
(set! new-settings (delete x new-settings)))
prop-settings)
(ly:context-set-property! where 'graceSettings new-settings)))
(ly:export (context-spec-music (make-apply-context delete-prop) 'Voice)))
(defmacro-public def-grace-function (start stop . docstring)
"Helper macro for defining grace music"
`(define-music-function (parser location music) (ly:music?)
,@docstring
(make-music 'GraceMusic
'origin location
'element (make-music 'SequentialMusic
'elements (list (ly:music-deep-copy ,start)
music
(ly:music-deep-copy ,stop))))))
(defmacro-public define-music-function (args signature . body)
"Helper macro for `ly:make-music-function'.
Syntax:
(define-music-function (parser location arg1 arg2 ...) (arg1-type? arg2-type? ...)
...function body...)
"
(if (and (pair? body) (pair? (car body)) (eqv? '_i (caar body)))
;; When the music function definition contains a i10n doc string,
;; (_i "doc string"), keep the literal string only
(let ((docstring (cadar body))
(body (cdr body)))
`(ly:make-music-function (list ,@signature)
(lambda (,@args)
,docstring
,@body)))
`(ly:make-music-function (list ,@signature)
(lambda (,@args)
,@body))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-public (cue-substitute quote-music)
"Must happen after @code{quote-substitute}."
(if (vector? (ly:music-property quote-music 'quoted-events))
(let* ((dir (ly:music-property quote-music 'quoted-voice-direction))
(clef (ly:music-property quote-music 'quoted-music-clef))
(main-voice (if (eq? 1 dir) 1 0))
(cue-voice (if (eq? 1 dir) 0 1))
(main-music (ly:music-property quote-music 'element))
(return-value quote-music))
(if (or (eq? 1 dir) (eq? -1 dir))
;; if we have stem dirs, change both quoted and main music
;; to have opposite stems.
(begin
(set! return-value
;; cannot context-spec Quote-music, since context
;; for the quotes is determined in the iterator.
(make-sequential-music
(list
(if (null? clef)
(make-music 'Music)
(make-cue-clef-set clef))
(context-spec-music (make-voice-props-set cue-voice) 'CueVoice "cue")
quote-music
(context-spec-music (make-voice-props-revert) 'CueVoice "cue")
(if (null? clef)
(make-music 'Music)
(make-cue-clef-unset)))))
(set! main-music
(make-sequential-music
(list
(make-voice-props-set main-voice)
main-music
(make-voice-props-revert))))
(set! (ly:music-property quote-music 'element) main-music)))
return-value)
quote-music))
(define-public ((quote-substitute quote-tab) music)
(let* ((quoted-name (ly:music-property music 'quoted-music-name))
(quoted-vector (and (string? quoted-name)
(hash-ref quote-tab quoted-name #f))))
(if (string? quoted-name)
(if (vector? quoted-vector)
(begin
(set! (ly:music-property music 'quoted-events) quoted-vector)
(set! (ly:music-property music 'iterator-ctor)
ly:quote-iterator::constructor))
(ly:warning (_ "cannot find quoted music: `~S'") quoted-name)))
music))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; switch it on here, so parsing and init isn't checked (too slow!)
;;
;; automatic music transformations.
(define (switch-on-debugging m)
(if (defined? 'set-debug-cell-accesses!)
(set-debug-cell-accesses! 15000))
m)
(define (music-check-error music)
(define found #f)
(define (signal m)
(if (and (ly:music? m)
(eq? (ly:music-property m 'error-found) #t))
(set! found #t)))
(for-each signal (ly:music-property music 'elements))
(signal (ly:music-property music 'element))
(if found
(set! (ly:music-property music 'error-found) #t))
music)
(define (precompute-music-length music)
(set! (ly:music-property music 'length)
(ly:music-length music))
music)
(define-public (make-duration-of-length moment)
"Make duration of the given @code{moment} length."
(ly:make-duration 0 0
(ly:moment-main-numerator moment)
(ly:moment-main-denominator moment)))
(define (make-skipped moment bool)
"Depending on BOOL, set or unset skipTypesetting,
then make SkipMusic of the given MOMENT length, and
then revert skipTypesetting."
(make-sequential-music
(list
(context-spec-music (make-property-set 'skipTypesetting bool)
'Score)
(make-music 'SkipMusic 'duration
(make-duration-of-length moment))
(context-spec-music (make-property-set 'skipTypesetting (not bool))
'Score))))
(define (skip-as-needed music parser)
"Replace MUSIC by
<< { \\set skipTypesetting = ##f
LENGTHOF(\\showFirstLength)
\\set skipTypesetting = ##t
LENGTHOF(\\showLastLength) }
MUSIC >>
if appropriate.
When only showFirstLength is set,
the 'length property of the music is
overridden to speed up compiling."
(let*
((show-last (ly:parser-lookup parser 'showLastLength))
(show-first (ly:parser-lookup parser 'showFirstLength))
(show-last-length (and (ly:music? show-last)
(ly:music-length show-last)))
(show-first-length (and (ly:music? show-first)
(ly:music-length show-first)))
(orig-length (ly:music-length music)))
;;FIXME: if using either showFirst- or showLastLength,
;; make sure that skipBars is not set.
(cond
;; both properties may be set.
((and show-first-length show-last-length)
(let
((skip-length (ly:moment-sub orig-length show-last-length)))
(make-simultaneous-music
(list
(make-sequential-music
(list
(make-skipped skip-length #t)
;; let's draw a separator between the beginning and the end
(context-spec-music (make-property-set 'whichBar "||")
'Timing)))
(make-skipped show-first-length #f)
music))))
;; we may only want to print the last length
(show-last-length
(let
((skip-length (ly:moment-sub orig-length show-last-length)))
(make-simultaneous-music
(list
(make-skipped skip-length #t)
music))))
;; we may only want to print the beginning; in this case
;; only the first length will be processed (much faster).
(show-first-length
;; the first length must not exceed the original length.
(if (ly:moment<? show-first-length orig-length)
(set! (ly:music-property music 'length)
show-first-length))
music)
(else music))))
(define-public toplevel-music-functions
(list
(lambda (music parser) (voicify-music music))
(lambda (x parser) (music-map music-check-error x))
(lambda (x parser) (music-map precompute-music-length x))
(lambda (music parser)
(music-map (quote-substitute (ly:parser-lookup parser 'musicQuotes)) music))
;; switch-on-debugging
(lambda (x parser) (music-map cue-substitute x))
(lambda (x parser)
(skip-as-needed x parser)
)))
;;;;;;;;;;
;;; general purpose music functions
(define (shift-octave pitch octave-shift)
(_i "Add @var{octave-shift} to the octave of @var{pitch}.")
(ly:make-pitch
(+ (ly:pitch-octave pitch) octave-shift)
(ly:pitch-notename pitch)
(ly:pitch-alteration pitch)))
;;;;;;;;;;;;;;;;;
;; lyrics
(define (apply-durations lyric-music durations)
(define (apply-duration music)
(if (and (not (equal? (ly:music-length music) ZERO-MOMENT))
(ly:duration? (ly:music-property music 'duration)))
(begin
(set! (ly:music-property music 'duration) (car durations))
(set! durations (cdr durations)))))
(music-map apply-duration lyric-music))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; accidentals
(define (recent-enough? bar-number alteration-def laziness)
(or (number? alteration-def)
(equal? laziness #t)
(<= bar-number (+ (cadr alteration-def) laziness))))
(define (accidental-invalid? alteration-def)
"Checks an alteration entry for being invalid.
Non-key alterations are invalidated when tying into the next bar or
when there is a clef change, since neither repetition nor cancellation
can be omitted when the same note occurs again.
Returns @code{#f} or the reason for the invalidation, a symbol."
(let* ((def (if (pair? alteration-def)
(car alteration-def)
alteration-def)))
(and (symbol? def) def)))
(define (extract-alteration alteration-def)
(cond ((number? alteration-def)
alteration-def)
((pair? alteration-def)
(car alteration-def))
(else 0)))
(define (check-pitch-against-signature context pitch barnum laziness octaveness)
"Checks the need for an accidental and a @q{restore} accidental against
@code{localKeySignature}. The @var{laziness} is the number of measures
for which reminder accidentals are used (i.e., if @var{laziness} is zero,
only cancel accidentals in the same measure; if @var{laziness} is three,
we cancel accidentals up to three measures after they first appear.
@var{octaveness} is either @code{'same-octave} or @code{'any-octave} and
specifies whether accidentals should be canceled in different octaves."
(let* ((ignore-octave (cond ((equal? octaveness 'any-octave) #t)
((equal? octaveness 'same-octave) #f)
(else
(ly:warning (_ "Unknown octaveness type: ~S ") octaveness)
(ly:warning (_ "Defaulting to 'any-octave."))
#t)))
(key-sig (ly:context-property context 'keySignature))
(local-key-sig (ly:context-property context 'localKeySignature))
(notename (ly:pitch-notename pitch))
(octave (ly:pitch-octave pitch))
(pitch-handle (cons octave notename))
(need-restore #f)
(need-accidental #f)
(previous-alteration #f)
(from-other-octaves #f)
(from-same-octave (assoc-get pitch-handle local-key-sig))
(from-key-sig (or (assoc-get notename local-key-sig)
;; If no key signature match is found from localKeySignature, we may have a custom
;; type with octave-specific entries of the form ((octave . pitch) alteration)
;; instead of (pitch . alteration). Since this type cannot coexist with entries in
;; localKeySignature, try extracting from keySignature instead.
(assoc-get pitch-handle key-sig))))
;; loop through localKeySignature to search for a notename match from other octaves
(let loop ((l local-key-sig))
(if (pair? l)
(let ((entry (car l)))
(if (and (pair? (car entry))
(= (cdar entry) notename))
(set! from-other-octaves (cdr entry))
(loop (cdr l))))))
;; find previous alteration-def for comparison with pitch
(cond
;; from same octave?
((and (not ignore-octave)
from-same-octave
(recent-enough? barnum from-same-octave laziness))
(set! previous-alteration from-same-octave))
;; from any octave?
((and ignore-octave
from-other-octaves
(recent-enough? barnum from-other-octaves laziness))
(set! previous-alteration from-other-octaves))
;; not recent enough, extract from key signature/local key signature
(from-key-sig
(set! previous-alteration from-key-sig)))
(if (accidental-invalid? previous-alteration)
(set! need-accidental #t)
(let* ((prev-alt (extract-alteration previous-alteration))
(this-alt (ly:pitch-alteration pitch)))
(if (not (= this-alt prev-alt))
(begin
(set! need-accidental #t)
(if (and (not (= this-alt 0))
(and (< (abs this-alt) (abs prev-alt))
(> (* prev-alt this-alt) 0)))
(set! need-restore #t))))))
(cons need-restore need-accidental)))
(define-public ((make-accidental-rule octaveness laziness) context pitch barnum measurepos)
"Create an accidental rule that makes its decision based on the octave of
the note and a laziness value.
@var{octaveness} is either @code{'same-octave} or @code{'any-octave} and
defines whether the rule should respond to accidental changes in other
octaves than the current. @code{'same-octave} is the normal way to typeset
accidentals -- an accidental is made if the alteration is different from the
last active pitch in the same octave. @code{'any-octave} looks at the last
active pitch in any octave.
@var{laziness} states over how many bars an accidental should be remembered.
@code{0}@tie{}is the default -- accidental lasts over 0@tie{}bar lines, that
is, to the end of current measure. A positive integer means that the
accidental lasts over that many bar lines. @code{-1} is `forget
immediately', that is, only look at key signature. @code{#t} is `forever'."
(check-pitch-against-signature context pitch barnum laziness octaveness))
(define (key-entry-notename entry)
"Return the pitch of an entry in localKeySignature. The entry is either of the form
'(notename . alter) or '((octave . notename) . (alter barnum . measurepos))."
(if (number? (car entry))
(car entry)
(cdar entry)))
(define (key-entry-octave entry)
"Return the octave of an entry in localKeySignature (or #f if the entry does not have
an octave)."
(and (pair? (car entry)) (caar entry)))
(define (key-entry-bar-number entry)
"Return the bar number of an entry in localKeySignature (or #f if the entry does not
have a bar number)."
(and (pair? (car entry)) (caddr entry)))
(define (key-entry-measure-position entry)
"Return the measure position of an entry in localKeySignature (or #f if the entry does
not have a measure position)."
(and (pair? (car entry)) (cdddr entry)))
(define (key-entry-alteration entry)
"Return the alteration of an entry in localKeySignature.
For convenience, returns @code{0} if entry is @code{#f}."
(if entry
(if (number? (car entry))
(cdr entry)
(cadr entry))
0))
(define-public (find-pitch-entry keysig pitch accept-global accept-local)
"Return the first entry in @var{keysig} that matches @var{pitch}.
@var{accept-global} states whether key signature entries should be included.
@var{accept-local} states whether local accidentals should be included.
If no matching entry is found, @var{#f} is returned."
(and (pair? keysig)
(let* ((entry (car keysig))
(entryoct (key-entry-octave entry))
(entrynn (key-entry-notename entry))
(oct (ly:pitch-octave pitch))
(nn (ly:pitch-notename pitch)))
(if (and (equal? nn entrynn)
(or (and accept-global (not entryoct))
(and accept-local (equal? oct entryoct))))
entry
(find-pitch-entry (cdr keysig) pitch accept-global accept-local)))))
(define-public (neo-modern-accidental-rule context pitch barnum measurepos)
"An accidental rule that typesets an accidental if it differs from the
key signature @emph{and} does not directly follow a note on the same
staff line. This rule should not be used alone because it does neither
look at bar lines nor different accidentals at the same note name."
(let* ((keysig (ly:context-property context 'localKeySignature))
(entry (find-pitch-entry keysig pitch #t #t)))
(if (not entry)
(cons #f #f)
(let* ((global-entry (find-pitch-entry keysig pitch #t #f))
(key-acc (key-entry-alteration global-entry))
(acc (ly:pitch-alteration pitch))
(entrymp (key-entry-measure-position entry))
(entrybn (key-entry-bar-number entry)))
(cons #f (not (or (equal? acc key-acc)
(and (equal? entrybn barnum) (equal? entrymp measurepos)))))))))
(define-public (teaching-accidental-rule context pitch barnum measurepos)
"An accidental rule that typesets a cautionary accidental if it is
included in the key signature @emph{and} does not directly follow a note
on the same staff line."
(let* ((keysig (ly:context-property context 'localKeySignature))
(entry (find-pitch-entry keysig pitch #t #t)))
(if (not entry)
(cons #f #f)
(let* ((global-entry (find-pitch-entry keysig pitch #f #f))
(key-acc (key-entry-alteration global-entry))
(acc (ly:pitch-alteration pitch))
(entrymp (key-entry-measure-position entry))
(entrybn (key-entry-bar-number entry)))
(cons #f (not (or (equal? acc key-acc)
(and (equal? entrybn barnum) (equal? entrymp measurepos)))))))))
(define-public (set-accidentals-properties extra-natural
auto-accs auto-cauts
context)
(context-spec-music
(make-sequential-music
(append (if (boolean? extra-natural)
(list (make-property-set 'extraNatural extra-natural))
'())
(list (make-property-set 'autoAccidentals auto-accs)
(make-property-set 'autoCautionaries auto-cauts))))
context))
(define-public (set-accidental-style style . rest)
"Set accidental style to @var{style}. Optionally take a context
argument, e.g. @code{'Staff} or @code{'Voice}. The context defaults
to @code{Staff}, except for piano styles, which use @code{GrandStaff}
as a context."
(let ((context (if (pair? rest)
(car rest) 'Staff))
(pcontext (if (pair? rest)
(car rest) 'GrandStaff)))
(ly:export
(cond
;; accidentals as they were common in the 18th century.
((equal? style 'default)
(set-accidentals-properties #t
`(Staff ,(make-accidental-rule 'same-octave 0))
'()
context))
;; accidentals from one voice do NOT get cancelled in other voices
((equal? style 'voice)
(set-accidentals-properties #t
`(Voice ,(make-accidental-rule 'same-octave 0))
'()
context))
;; accidentals as suggested by Kurt Stone, Music Notation in the 20th century.
;; This includes all the default accidentals, but accidentals also needs cancelling
;; in other octaves and in the next measure.
((equal? style 'modern)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
context))
;; the accidentals that Stone adds to the old standard as cautionaries
((equal? style 'modern-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
context))
;; same as modern, but accidentals different from the key signature are always
;; typeset - unless they directly follow a note of the same pitch.
((equal? style 'neo-modern)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
'()
context))
((equal? style 'neo-modern-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
context))
((equal? style 'neo-modern-voice)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
'()
context))
((equal? style 'neo-modern-voice-cautionary)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0))
`(Voice ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
context))
;; Accidentals as they were common in dodecaphonic music with no tonality.
;; Each note gets one accidental.
((equal? style 'dodecaphonic)
(set-accidentals-properties #f
`(Staff ,(lambda (c p bn mp) '(#f . #t)))
'()
context))
;; Multivoice accidentals to be read both by musicians playing one voice
;; and musicians playing all voices.
;; Accidentals are typeset for each voice, but they ARE cancelled across voices.
((equal? style 'modern-voice)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
context))
;; same as modernVoiceAccidental eccept that all special accidentals are typeset
;; as cautionaries
((equal? style 'modern-voice-cautionary)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0))
`(Voice ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
context))
;; stone's suggestions for accidentals on grand staff.
;; Accidentals are cancelled across the staves in the same grand staff as well
((equal? style 'piano)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
GrandStaff
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
pcontext))
((equal? style 'piano-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
GrandStaff
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
pcontext))
;; same as modern, but cautionary accidentals are printed for all sharp or flat
;; tones specified by the key signature.
((equal? style 'teaching)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'same-octave 1)
,teaching-accidental-rule)
context))
;; do not set localKeySignature when a note alterated differently from
;; localKeySignature is found.
;; Causes accidentals to be printed at every note instead of
;; remembered for the duration of a measure.
;; accidentals not being remembered, causing accidentals always to
;; be typeset relative to the time signature
((equal? style 'forget)
(set-accidentals-properties '()
`(Staff ,(make-accidental-rule 'same-octave -1))
'()
context))
;; Do not reset the key at the start of a measure. Accidentals will be
;; printed only once and are in effect until overridden, possibly many
;; measures later.
((equal? style 'no-reset)
(set-accidentals-properties '()
`(Staff ,(make-accidental-rule 'same-octave #t))
'()
context))
(else
(ly:warning (_ "unknown accidental style: ~S") style)
(make-sequential-music '()))))))
(define-public (invalidate-alterations context)
"Invalidate alterations in @var{context}.
Elements of @code{'localKeySignature} corresponding to local
alterations of the key signature have the form
@code{'((octave . notename) . (alter barnum . measurepos))}.
Replace them with a version where @code{alter} is set to @code{'clef}
to force a repetition of accidentals.
Entries that conform with the current key signature are not invalidated."
(let* ((keysig (ly:context-property context 'keySignature)))
(set! (ly:context-property context 'localKeySignature)
(map-in-order
(lambda (entry)
(let* ((localalt (key-entry-alteration entry))
(localoct (key-entry-octave entry)))
(if (or (accidental-invalid? localalt)
(not localoct)
(= localalt
(key-entry-alteration
(find-pitch-entry
keysig
(ly:make-pitch localoct
(key-entry-notename entry)
0)
#t #t))))
entry
(cons (car entry) (cons 'clef (cddr entry))))))
(ly:context-property context 'localKeySignature)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-public (skip-of-length mus)
"Create a skip of exactly the same length as @var{mus}."
(let* ((skip
(make-music
'SkipEvent
'duration (ly:make-duration 0 0))))
(make-event-chord (list (ly:music-compress skip (ly:music-length mus))))))
(define-public (mmrest-of-length mus)
"Create a multi-measure rest of exactly the same length as @var{mus}."
(let* ((skip
(make-multi-measure-rest
(ly:make-duration 0 0) '())))
(ly:music-compress skip (ly:music-length mus))
skip))
(define-public (pitch-of-note event-chord)
(let ((evs (filter (lambda (x)
(music-has-type x 'note-event))
(ly:music-property event-chord 'elements))))
(and (pair? evs)
(ly:music-property (car evs) 'pitch))))
(define-public (duration-of-note event-chord)
(let ((evs (filter (lambda (x)
(music-has-type x 'rhythmic-event))
(ly:music-property event-chord 'elements))))
(and (pair? evs)
(ly:music-property (car evs) 'duration))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-public (extract-named-music music music-name)
"Return a flat list of all music named @var{music-name} from @var{music}."
(let ((extracted-list
(if (ly:music? music)
(if (eq? (ly:music-property music 'name) music-name)
(list music)
(let ((elt (ly:music-property music 'element))
(elts (ly:music-property music 'elements)))
(if (ly:music? elt)
(extract-named-music elt music-name)
(if (null? elts)
'()
(map (lambda(x)
(extract-named-music x music-name ))
elts)))))
'())))
(flatten-list extracted-list)))
(define-public (event-chord-notes event-chord)
"Return a list of all notes from @var{event-chord}."
(filter
(lambda (m) (eq? 'NoteEvent (ly:music-property m 'name)))
(ly:music-property event-chord 'elements)))
(define-public (event-chord-pitches event-chord)
"Return a list of all pitches from @var{event-chord}."
(map (lambda (x) (ly:music-property x 'pitch))
(event-chord-notes event-chord)))
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