+;;;; music-functions.scm --
+;;;;
+;;;; source file of the GNU LilyPond music typesetter
+;;;;
+;;;; (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
-(define (denominator-tuplet-formatter mus)
- (number->string (ly-get-mus-property mus 'denominator)))
+;; (use-modules (ice-9 optargs))
-(define (fraction-tuplet-formatter mus)
- (string-append (number->string (ly-get-mus-property mus 'numerator))
- ":"
- (number->string (ly-get-mus-property mus 'denominator))
- ))
+;;; 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 (unfold-repeats music)
+(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:prob-property
+ (make-procedure-with-setter ly:prob-property
+ ly:prob-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 MUSIC.
"
-[Rune Zedeler]
+ (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 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 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
+ 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 a expression that, once evaluated, may return an object equivalent to `obj',
+that is, for a music expression, a (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 SHIFT to duration-log of 'duration in music and optionally
+ a dot to any note encountered. This scales the music up by a factor
+ 2^shift * (2 - (1/2)^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"
+ (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 (equal? name "tremolo")
+ (let* ((dots (1- (logcount times)))
+ (mult (/ (* times (ash 1 dots)) (1- (ash 2 dots))))
+ (shift (- (ly:intlog2 (floor mult)))))
+ (if (not (integer? mult))
+ (ly:warning (_ "invalid tremolo repeat count: ~a") times))
+ (if (memq 'sequential-music (ly:music-property main 'types))
+ ;; \repeat "tremolo" { c4 d4 }
+ (let ((children (length (ly:music-property main 'elements))))
+
+ ;; fixme: should be more generic.
+ (if (and (not (= children 2))
+ (not (= children 1)))
+ (ly:warning (_ "expecting 2 elements for chord tremolo, found ~a") children))
+ (ly:music-compress r (ly:make-moment 1 children))
+ (shift-duration-log r
+ (if (= children 2) (1- shift) shift)
+ dots))
+ ;; \repeat "tremolo" c4
+ (shift-duration-log r shift dots)))
+ r)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; clusters.
+
+(define-public (note-to-cluster music)
+ "Replace NoteEvents by 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)
+ "
+This function replaces all repeats with unfold 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)))
+
+ (if (= 0 -1)
+ (set! count (* 2 (quotient count 3))))
+
+ (shift-duration-log music (+ (if seq-arg? 1 0)
+ (ly:intlog2 count)) dot-shift)
+
+ (if seq-arg?
+ (ly:music-compress e (ly:make-moment (length (ly:music-property
+ e 'elements)) 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 Music expression that sets GPROP to VAL in 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 Music expression that sets GPROP to VAL in GROB. Does a pop first,
+i.e. this is not an override"
+ (make-music 'OverrideProperty
+ 'symbol grob
+ 'grob-property gprop
+ 'grob-value val))
+
+(define-public (make-grob-property-revert grob gprop)
+ "Revert the grob property GPROP for 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))
-Han-Wen Nienhuys wrote:
+(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 Dots font-size -3)
+ (Voice Stem length-fraction 0.8)
+ (Voice Stem no-stem-extend #t)
+ (Voice Beam thickness 0.384)
+ (Voice Beam length-fraction 0.8)
+ (Voice Accidental font-size -4)))
+
+ (make-grob-property-set 'NoteColumn 'horizontal-shift (quotient n 2))
+ (make-grob-property-set 'MultiMeasureRest 'staff-position (if (odd? n) -4 4))))))
-> It shouldn't be hard to write a Scheme function to replace all repeats
-> with unfold repeats.
-[...]
-> Left to the reader as an exercise.
+(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)))))
-With thanks to Han-Wen:
+(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 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))
+
+(define-public (make-ottava-set octavation)
+ (let ((m (make-music 'ApplyContext)))
+ (define (ottava-modify context)
+ "Either reset middleCPosition to the stored original, or remember
+old middleCPosition, add OCTAVATION to middleCPosition, and set
+OTTAVATION to `8va', or whatever appropriate."
+ (if (number? (ly:context-property context 'middleCOffset))
+ (let ((where (ly:context-property-where-defined context 'middleCOffset)))
+ (ly:context-unset-property where 'middleCOffset)
+ (ly:context-unset-property where 'ottavation)))
+
+ (let* ((offset (* -7 octavation))
+ (string (cdr (assoc octavation '((2 . "15ma")
+ (1 . "8va")
+ (0 . #f)
+ (-1 . "8vb")
+ (-2 . "15mb"))))))
+ (ly:context-set-property! context 'middleCOffset offset)
+ (ly:context-set-property! context 'ottavation string)
+ (ly:set-middle-C! context)))
+ (set! (ly:music-property m 'procedure) ottava-modify)
+ (context-spec-music m 'Staff)))
+
+(define-public (set-octavation ottavation)
+ (ly:export (make-ottava-set ottavation)))
+
+(define-public (make-time-signature-set num den . rest)
+ "Set properties for time signature NUM/DEN. Rest can contain a list
+of beat groupings "
+
+ (define (standard-beat-grouping num den)
+
+ "Some standard subdivisions for time signatures."
+ (let*
+ ((key (cons num den))
+ (entry (assoc key '(
+ ; Simple time signatures
+ (( 3 . 8) . (3))
+ (( 4 . 8) . (2 2))
+ ; Compound time signatures
+ (( 6 . 4) . (3 3))
+ (( 6 . 8) . (3 3))
+ (( 6 . 16) . (3 3))
+ (( 9 . 4) . (3 3 3))
+ (( 9 . 8) . (3 3 3))
+ (( 9 . 16) . (3 3 3))
+ ((12 . 4) . (3 3 3 3))
+ ((12 . 8) . (3 3 3 3))
+ ((12 . 16) . (3 3 3 3))
+ ; Some common irregular time signatures
+ (( 5 . 8) . (3 2))
+ (( 8 . 8) . (3 3 2))
+ ))))
+
+ (if entry
+ (cdr entry)
+ '())))
+
+ (let* ((set1 (make-property-set 'timeSignatureFraction (cons num den)))
+ (beat (ly:make-moment 1 den))
+ (len (ly:make-moment num den))
+ (set2 (make-property-set 'beatLength beat))
+ (set3 (make-property-set 'measureLength len))
+ (set4 (make-property-set 'beatGrouping (if (pair? rest)
+ (car rest)
+ (standard-beat-grouping num den))))
+ (basic (list set1 set2 set3 set4)))
+ (descend-to-context
+ (context-spec-music (make-sequential-music basic) 'Timing) 'Score)))
+
+(define-public (make-mark-set label)
+ "Make the music for the \\mark command."
+ (let* ((set (if (integer? label)
+ (context-spec-music (make-property-set 'rehearsalMark label)
+ 'Score)
+ #f))
+ (ev (make-music 'MarkEvent))
+ (ch (make-event-chord (list ev))))
+ (if set
+ (make-sequential-music (list set ch))
+ (begin
+ (set! (ly:music-property ev 'label) label)
+ ch))))
+
+(define-public (set-time-signature num den . rest)
+ (ly:export (apply make-time-signature-set `(,num ,den . ,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 (set-mus-properties! m alist)
+ "Set all of ALIST as properties of 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 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.
"
- (let* ((es (ly-get-mus-property music 'elements))
- (e (ly-get-mus-property music 'element))
- (body (ly-get-mus-property music 'body))
- (alts (ly-get-mus-property music 'alternatives))
- (n (ly-music-name music)))
-
- (if (equal? n "Repeated_music")
- (begin
- (ly-set-mus-property
- music 'length Repeated_music::unfolded_music_length)
- (ly-set-mus-property
- music 'iterator-ctor Unfolded_repeat_iterator::constructor)))
+ (if (null? lst)
+ '()
+ (cons (context-spec-music
+ (make-sequential-music
+ (list (make-voice-props-set number)
+ (make-simultaneous-music (car lst))))
+ 'Voice (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 \\ "
+ (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)
- (ly-set-mus-property
- music 'elements
- (map unfold-repeats 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)
+ ;;(display symbol)
+ ;;(eq? #t (ly:grob-property elt symbol))
+ (not (eq? #f (memq symbol (ly:grob-property elt 'interfaces))))))
+
+(define-public ((outputproperty-compatibility func sym val) grob g-context ao-context)
+ (if (func grob)
+ (set! (ly:grob-property grob sym) val)))
- (if (music? alts)
- (ly-set-mus-property
- music 'alternatives
- (unfold-repeats alts)))
- (if (music? body)
- (ly-set-mus-property
- music 'body
- (unfold-repeats body)))
+(define-public ((set-output-property grob-name symbol val) grob grob-c context)
+ "Usage:
- (if (music? e)
- (ly-set-mus-property
- music 'element
- (unfold-repeats e)))
+\\applyoutput #(set-output-property 'Clef 'extra-offset '(0 . 1))
+"
+ (let ((meta (ly:grob-property grob 'meta)))
+ (if (equal? (cdr (assoc '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)))
+ (if (= bn n)
+ #t
+ (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 MUS by RestEvent of the same duration if it is a
+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 SYM=VAL for GROB in 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 SYM for GROB in 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 quote-substitute."
+
+ (if (vector? (ly:music-property quote-music 'quoted-events))
+ (let* ((dir (ly:music-property quote-music 'quoted-voice-direction))
+ (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
+ (context-spec-music (make-voice-props-set cue-voice) 'CueVoice "cue")
+ quote-music
+ (context-spec-music (make-voice-props-revert) 'CueVoice "cue"))))
+ (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 (if (string? quoted-name)
+ (hash-ref quote-tab quoted-name #f)
+ #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 MOMENT length."
+ (ly:make-duration 0 0
+ (ly:moment-main-numerator moment)
+ (ly:moment-main-denominator moment)))
+
+(define (skip-this moment)
+ "set skipTypesetting, make SkipMusic of the given MOMENT length,
+ and then unset skipTypesetting."
+ (make-sequential-music
+ (list
+ (context-spec-music (make-property-set 'skipTypesetting #t)
+ 'Score)
+ (make-music 'SkipMusic 'duration
+ (make-duration-of-length moment))
+ (context-spec-music (make-property-set 'skipTypesetting #f)
+ 'Score))))
+
+(define (unskip-this moment)
+ "unset skipTypesetting, make SkipMusic of the given MOMENT length,
+ and then set skipTypesetting."
+ (make-sequential-music
+ (list
+ (context-spec-music (make-property-set 'skipTypesetting #f)
+ 'Score)
+ (make-music 'SkipMusic 'duration
+ (make-duration-of-length moment))
+ (context-spec-music (make-property-set 'skipTypesetting #t)
+ '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)))
+ (cond
+
+ ;; both properties may be set.
+ ((and (ly:music? show-first) (ly:music? show-last))
+ (let*
+ ((orig-length (ly:music-length music))
+ (skip-length (ly:moment-sub orig-length (ly:music-length show-last)))
+ (begin-length (ly:music-length show-first)))
+ (make-simultaneous-music
+ (list
+ (make-sequential-music
+ (list
+ (skip-this skip-length)
+ ;; let's draw a separator between the beginning and the end
+ (context-spec-music (make-property-set 'whichBar "||")
+ 'Timing)))
+ (unskip-this begin-length)
+ music))))
+
+ ;; we may only want to print the last length
+ ((ly:music? show-last)
+ (let*
+ ((orig-length (ly:music-length music))
+ (skip-length (ly:moment-sub orig-length (ly:music-length show-last))))
+ (make-simultaneous-music
+ (list
+ (skip-this skip-length)
+ music))))
+
+ ;; we may only want to print the beginning; in this case
+ ;; only the first length will be processed (much faster).
+ ((ly:music? show-first)
+ (let*
+ ((orig-length (ly:music-length music))
+ (begin-length (ly:music-length show-first)))
+ ;; the first length must not exceed the original length.
+ (if (ly:moment<? begin-length orig-length)
+ (set! (ly:music-property music 'length)
+ (ly:music-length show-first)))
+ 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-public ((make-accidental-rule octaveness lazyness) context pitch barnum measurepos)
+ "Creates an accidental rule that makes its decision based on the octave of the note
+ and a laziness value.
+ octaveness is either 'same-octave or 'any-octave and defines whether the rule should
+ respond to accidental changes in other octaves than the current. '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. 'any-octave looks at the last active pitch
+ in any octave.
+ lazyness states over how many bars an accidental should be remembered.
+ 0 is default - accidental lasts over 0 bar lines, that is, to the end of current measure.
+ A positive integer means that the accidental lasts over that many bar lines.
+ -1 is 'forget immediately', that is, only look at key signature.
+ #t is forever."
+ (let ((keysig (ly:context-property context 'localKeySignature)))
+ (ly:find-accidentals-simple keysig pitch barnum lazyness 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."
+ (if (number? (car entry))
+ (cdr entry)
+ (cadr entry)))
+
+(define-public (find-pitch-entry keysig pitch accept-global accept-local)
+ "Return the first entry in keysig that matches the pitch.
+ accept-global states whether key signature entries should be included.
+ accept-local states whether local accidentals should be included.
+ if no matching entry is found, #f is returned."
+ (if (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 (equal? #f entryoct))
+ (and accept-local (equal? oct entryoct))))
+ entry
+ (find-pitch-entry (cdr keysig) pitch accept-global accept-local)))
+ #f))
+
+(define-public (neo-modern-accidental-rule context pitch barnum measurepos)
+ "an accidental rule that typesets an accidental if it differs from the key signature
+ 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 notename"
+ (let* ((keysig (ly:context-property context 'localKeySignature))
+ (entry (find-pitch-entry keysig pitch #t #t)))
+ (if (equal? #f entry)
+ (cons #f #f)
+ (let* ((global-entry (find-pitch-entry keysig pitch #t #f))
+ (key-acc (if (equal? global-entry #f)
+ 0
+ (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 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 (equal? #f entry)
+ (cons #f #f)
+ (let* ((global-entry (find-pitch-entry keysig pitch #f #f))
+ (key-acc (if (equal? global-entry #f)
+ 0
+ (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 STYLE. Optionally takes a context argument,
+e.g. 'Staff or 'Voice. The context defaults to Staff, except for piano styles, which
+use 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))
+ ;; 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 (skip-of-length mus)
+ "Create a skip of exactly the same length as 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 mmrest of exactly the same length as 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) (memq 'note-event (ly:music-property x 'types)))
+ (ly:music-property event-chord 'elements))))
+
+ (if (pair? evs)
+ (ly:music-property (car evs) 'pitch)
+ #f)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define-public (extract-named-music music music-name)
+"Return a flat list of all music named @code{music-name}
+from @code{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 @{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 @{event-chord}."
+ (map (lambda (x) (ly:music-property x 'pitch))
+ (event-chord-notes event-chord)))
projects / lilypond.git / blobdiff