1 ;;; define-music-display-methods.scm -- data for displaying music
2 ;;; expressions using LilyPond notation.
4 ;;; (c) 2005--2006 Nicolas Sceaux <nicolas.sceaux@free.fr>
7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
9 ;;; Display method implementation
12 (define-module (scm display-lily))
17 (define (scheme-expr->lily-string scm-arg)
18 (cond ((or (number? scm-arg)
20 (format #f "~s" scm-arg))
21 ((or (symbol? scm-arg)
23 (format #f "'~s" scm-arg))
26 (or (procedure-name scm-arg)
27 (with-output-to-string
29 (pretty-print (procedure-source scm-arg)))))))
32 (with-output-to-string
34 (display-scheme-music scm-arg)))))))
39 (define-public (markup->lily-string markup-expr)
40 "Return a string describing, in LilyPond syntax, the given markup expression."
41 (define (proc->command proc)
42 (let ((cmd-markup (symbol->string (procedure-name proc))))
43 (substring cmd-markup 0 (- (string-length cmd-markup)
44 (string-length "-markup")))))
45 (define (arg->string arg)
48 ((markup? arg) ;; a markup
49 (markup->lily-string-aux arg))
50 ((and (pair? arg) (every markup? arg)) ;; a markup list
51 (format #f "{~{ ~a~}}" (map-in-order markup->lily-string-aux arg)))
52 (else ;; a scheme argument
53 (format #f "#~a" (scheme-expr->lily-string arg)))))
54 (define (markup->lily-string-aux expr)
57 (let ((cmd (car expr))
59 (if (eqv? cmd simple-markup) ;; a simple markup
60 (format #f "~s" (car args))
61 (format #f "\\~a~{ ~a~}"
63 (map-in-order arg->string args))))))
64 (cond ((string? markup-expr)
65 (format #f "~s" markup-expr))
66 ((eqv? (car markup-expr) simple-markup)
67 (format #f "~s" (second markup-expr)))
69 (format #f "\\markup ~a"
70 (markup->lily-string-aux markup-expr)))))
76 ;; It is a pity that there is no rassoc in Scheme.
77 (define* (rassoc item alist #:optional (test equal?))
78 (do ((alist alist (cdr alist))
80 ((or result (null? alist)) result)
81 (if (and (car alist) (test item (cdar alist)))
82 (set! result (car alist)))))
84 (define (note-name->lily-string ly-pitch parser)
85 ;; here we define a custom pitch= function, since we do not want to
86 ;; test whether octaves are also equal. (otherwise, we would be using equal?)
87 (define (pitch= pitch1 pitch2)
88 (and (= (ly:pitch-notename pitch1) (ly:pitch-notename pitch2))
89 (= (ly:pitch-alteration pitch1) (ly:pitch-alteration pitch2))))
90 (let ((result (rassoc ly-pitch (ly:parser-lookup parser 'pitchnames) pitch=)))
95 (define (octave->lily-string pitch)
96 (let ((octave (ly:pitch-octave pitch)))
98 (make-string (1+ octave) #\'))
100 (make-string (1- (* -1 octave)) #\,))
106 (define* (duration->lily-string ly-duration #:key (prev-duration (*previous-duration*))
107 (force-duration (*force-duration*))
108 (time-factor-numerator (*time-factor-numerator*))
109 (time-factor-denominator (*time-factor-denominator*)))
110 (let ((log2 (ly:duration-log ly-duration))
111 (dots (ly:duration-dot-count ly-duration))
112 (num+den (ly:duration-factor ly-duration)))
113 (if (or force-duration (not prev-duration) (not (equal? ly-duration prev-duration)))
114 (string-append (case log2
118 (else (number->string (expt 2 log2))))
119 (make-string dots #\.)
120 (let ((num? (not (or (= 1 (car num+den))
121 (and time-factor-numerator
122 (= (car num+den) time-factor-numerator)))))
123 (den? (not (or (= 1 (cdr num+den))
124 (and time-factor-denominator
125 (= (cdr num+den) time-factor-denominator))))))
127 (format #f "*~a/~a" (car num+den) (cdr num+den)))
129 (format #f "*~a" (car num+den)))
137 (define post-event? (make-music-type-predicate
142 'MultiMeasureTextEvent
157 'AbsoluteDynamicEvent
165 (define* (event-direction->lily-string event #:optional (required #t))
166 (let ((direction (ly:music-property event 'direction)))
167 (cond ((or (not direction) (null? direction) (= CENTER direction))
168 (if required "-" ""))
169 ((= UP direction) "^")
170 ((= DOWN direction) "_")
173 (define-macro (define-post-event-display-method type vars direction-required str)
174 `(define-display-method ,type ,vars
176 (event-direction->lily-string ,(car vars) ,direction-required)
179 (define-macro (define-span-event-display-method type vars direction-required str-start str-stop)
180 `(define-display-method ,type ,vars
182 (event-direction->lily-string ,(car vars) ,direction-required)
183 (if (= START (ly:music-property ,(car vars) 'span-direction))
187 (define-display-method HyphenEvent (event parser)
189 (define-display-method ExtenderEvent (event parser)
191 (define-display-method TieEvent (event parser)
193 (define-display-method BeamForbidEvent (event parser)
195 (define-display-method StringNumberEvent (event parser)
196 (format #f "\\~a" (ly:music-property event 'string-number)))
199 (define-display-method TremoloEvent (event parser)
200 (let ((tremolo-type (ly:music-property event 'tremolo-type)))
201 (format #f ":~a" (if (= 0 tremolo-type)
205 (define-post-event-display-method ArticulationEvent (event parser) #t
206 (let ((articulation (ly:music-property event 'articulation-type)))
207 (case (string->symbol articulation)
211 ((staccatissimo) "|")
215 (else (format #f "\\~a" articulation)))))
217 (define-post-event-display-method FingeringEvent (event parser) #t
218 (ly:music-property event 'digit))
220 (define-post-event-display-method TextScriptEvent (event parser) #t
221 (markup->lily-string (ly:music-property event 'text)))
223 (define-post-event-display-method MultiMeasureTextEvent (event parser) #t
224 (markup->lily-string (ly:music-property event 'text)))
226 (define-post-event-display-method HarmonicEvent (event parser) #t "\\harmonic")
227 (define-post-event-display-method GlissandoEvent (event parser) #t "\\glissando")
228 (define-post-event-display-method ArpeggioEvent (event parser) #t "\\arpeggio")
229 (define-post-event-display-method AbsoluteDynamicEvent (event parser) #f
230 (format #f "\\~a" (ly:music-property event 'text)))
232 (define-span-event-display-method BeamEvent (event parser) #f "[" "]")
233 (define-span-event-display-method SlurEvent (event parser) #f "(" ")")
234 (define-span-event-display-method CrescendoEvent (event parser) #f "\\<" "\\!")
235 (define-span-event-display-method DecrescendoEvent (event parser) #f "\\>" "\\!")
236 (define-span-event-display-method PhrasingSlurEvent (event parser) #f "\\(" "\\)")
237 (define-span-event-display-method SustainEvent (event parser) #f "\\sustainDown" "\\sustainUp")
238 (define-span-event-display-method SostenutoEvent (event parser) #f "\\sostenutoDown" "\\sostenutoUp")
239 (define-span-event-display-method TextSpanEvent (event parser) #f "\\startTextSpan" "\\stopTextSpan")
240 (define-span-event-display-method TrillSpanEvent (event parser) #f "\\startTrillSpan" "\\stopTrillSpan")
241 (define-span-event-display-method StaffSpanEvent (event parser) #f "\\startStaff" "\\stopStaff")
242 (define-span-event-display-method NoteGroupingEvent (event parser) #f "\\startGroup" "\\stopGroup")
243 (define-span-event-display-method UnaCordaEvent (event parser) #f "\\unaCorda" "\\treCorde")
249 (define-display-method GraceMusic (expr parser)
250 (format #f "\\grace ~a"
251 (music->lily-string (ly:music-property expr 'element) parser)))
253 ;; \acciaccatura \appoggiatura \grace
254 ;; TODO: it would be better to compare ?start and ?stop
255 ;; with startAppoggiaturaMusic and stopAppoggiaturaMusic,
256 ;; using a custom music equality predicate.
257 (define-extra-display-method GraceMusic (expr parser)
258 "Display method for appoggiatura."
259 (with-music-match (expr (music
266 ;; we check whether ?start and ?stop look like
267 ;; startAppoggiaturaMusic stopAppoggiaturaMusic
268 (and (with-music-match (?start (music
274 duration (ly:make-duration 0 0 0 1))
277 span-direction START))))))
279 (with-music-match (?stop (music
285 duration (ly:make-duration 0 0 0 1))
288 span-direction STOP))))))
289 (format #f "\\appoggiatura ~a" (music->lily-string ?music parser))))))
292 (define-extra-display-method GraceMusic (expr parser)
293 "Display method for acciaccatura."
294 (with-music-match (expr (music
301 ;; we check whether ?start and ?stop look like
302 ;; startAcciaccaturaMusic stopAcciaccaturaMusic
303 (and (with-music-match (?start (music
309 duration (ly:make-duration 0 0 0 1))
312 span-direction START)))
317 grob-property-path '(stroke-style)
321 (with-music-match (?stop (music
327 grob-property-path '(stroke-style)
333 duration (ly:make-duration 0 0 0 1))
336 span-direction STOP))))))
337 (format #f "\\acciaccatura ~a" (music->lily-string ?music parser))))))
339 (define-extra-display-method GraceMusic (expr parser)
340 "Display method for grace."
341 (with-music-match (expr (music
348 ;; we check whether ?start and ?stop look like
349 ;; startGraceMusic stopGraceMusic
350 (and (null? (ly:music-property ?start 'elements))
351 (null? (ly:music-property ?stop 'elements))
352 (format #f "\\grace ~a" (music->lily-string ?music parser)))))
358 (define-display-method SequentialMusic (seq parser)
359 (let ((force-line-break (and (*force-line-break*)
361 (> (length (ly:music-property seq 'elements))
362 (*max-element-number-before-break*))))
363 (elements (ly:music-property seq 'elements))
364 (chord? (make-music-type-predicate 'EventChord))
365 (cluster? (make-music-type-predicate 'ClusterNoteEvent))
366 (note? (make-music-type-predicate 'NoteEvent)))
367 (format #f "~a~a{~v%~v_~{~a ~}~v%~v_}"
370 (any cluster? (ly:music-property e 'elements))))
374 (if (*explicit-mode*)
375 ;; if the sequence contains EventChord which contains figures ==> figuremode
376 ;; if the sequence contains EventChord which contains lyrics ==> lyricmode
377 ;; if the sequence contains EventChord which contains drum notes ==> drummode
378 (cond ((any (lambda (chord)
379 (any (make-music-type-predicate 'BassFigureEvent)
380 (ly:music-property chord 'elements)))
381 (filter chord? elements))
383 ((any (lambda (chord)
384 (any (make-music-type-predicate 'LyricEvent)
385 (ly:music-property chord 'elements)))
386 (filter chord? elements))
388 ((any (lambda (chord)
391 (not (null? (ly:music-property event 'drum-type)))))
392 (ly:music-property chord 'elements)))
393 (filter chord? elements))
395 (else ;; TODO: other modes?
398 (if force-line-break 1 0)
399 (if force-line-break (+ 2 (*indent*)) 1)
400 (parameterize ((*indent* (+ 2 (*indent*))))
401 (map-in-order (lambda (music)
402 (music->lily-string music parser))
404 (if force-line-break 1 0)
405 (if force-line-break (*indent*) 0))))
407 (define-display-method SimultaneousMusic (sim parser)
408 (parameterize ((*indent* (+ 3 (*indent*))))
409 (format #f "<< ~{~a ~}>>"
410 (map-in-order (lambda (music)
411 (music->lily-string music parser))
412 (ly:music-property sim 'elements)))))
414 (define-extra-display-method SimultaneousMusic (expr parser)
415 "If `sim' is an \afterGrace expression, return \"\\afterGrace ...\".
416 Otherwise, return #f."
417 ;; TODO: do something with afterGraceFraction?
418 (with-music-match (expr (music 'SimultaneousMusic
419 elements (?before-grace
420 (music 'SequentialMusic
421 elements ((music 'SkipMusic)
424 (format #f "\\afterGrace ~a ~a"
425 (music->lily-string ?before-grace parser)
426 (music->lily-string ?grace parser))))
432 (define-display-method EventChord (chord parser)
433 ;; event_chord : simple_element post_events
435 ;; | note_chord_element
437 ;; TODO : tagged post_events
438 ;; post_events : ( post_event | tagged_post_event )*
439 ;; tagged_post_event: '-' \tag embedded_scm post_event
441 (let* ((elements (ly:music-property chord 'elements))
442 (simple-elements (filter (make-music-type-predicate
443 'NoteEvent 'ClusterNoteEvent 'RestEvent
444 'MultiMeasureRestEvent 'SkipEvent 'LyricEvent)
446 (if ((make-music-type-predicate 'StaffSpanEvent 'BreathingEvent) (car elements))
447 ;; first, a special case: StaffSpanEvent (\startStaff, \stopStaff)
448 ;; and BreathingEvent (\breathe)
449 (music->lily-string (car elements) parser)
450 (if (and (not (null? simple-elements))
451 (null? (cdr simple-elements)))
452 ;; simple_element : note | figure | rest | mmrest | lyric_element | skip
453 (let* ((simple-element (car simple-elements))
454 (duration (ly:music-property simple-element 'duration))
455 (lily-string (format #f "~a~a~a~{~a ~}"
456 (music->lily-string simple-element parser)
457 (duration->lily-string duration)
458 (if (and ((make-music-type-predicate 'RestEvent) simple-element)
459 (ly:pitch? (ly:music-property simple-element 'pitch)))
462 (map-in-order (lambda (music)
463 (music->lily-string music parser))
464 (filter post-event? elements)))))
465 (*previous-duration* duration)
467 (let ((chord-elements (filter (make-music-type-predicate
468 'NoteEvent 'ClusterNoteEvent 'BassFigureEvent)
470 (post-events (filter post-event? elements)))
471 (if (not (null? chord-elements))
472 ;; note_chord_element : '<' (notepitch | drumpitch)* '>" duration post_events
473 (let ((lily-string (format #f "< ~{~a ~}>~a~{~a ~}"
474 (map-in-order (lambda (music)
475 (music->lily-string music parser))
477 (duration->lily-string (ly:music-property (car chord-elements)
479 (map-in-order (lambda (music)
480 (music->lily-string music parser))
482 (*previous-duration* (ly:music-property (car chord-elements) 'duration))
485 (format #f "~{~a ~}" (map-in-order (lambda (music)
486 (music->lily-string music parser))
489 (define-display-method MultiMeasureRestMusic (mmrest parser)
490 (let* ((dur (ly:music-property mmrest 'duration))
491 (ly (format #f "R~a~{~a ~}"
492 (duration->lily-string dur)
493 (map-in-order (lambda (music)
494 (music->lily-string music parser))
495 (ly:music-property mmrest 'articulations)))))
496 (*previous-duration* dur)
499 (define-display-method SkipMusic (skip parser)
500 (format #f "\\skip ~a" (duration->lily-string (ly:music-property skip 'duration) #:force-duration #t)))
503 ;;; Notes, rests, skips...
506 (define (simple-note->lily-string event parser)
507 (format #f "~a~a~a~a~{~a~}" ; pitchname octave !? octave-check articulations
508 (note-name->lily-string (ly:music-property event 'pitch) parser)
509 (octave->lily-string (ly:music-property event 'pitch))
510 (let ((forced (ly:music-property event 'force-accidental))
511 (cautionary (ly:music-property event 'cautionary)))
512 (cond ((and (not (null? forced))
514 (not (null? cautionary))
517 ((and (not (null? forced)) forced) "!")
519 (let ((octave-check (ly:music-property event 'absolute-octave)))
520 (if (not (null? octave-check))
521 (format #f "=~a" (cond ((>= octave-check 0)
522 (make-string (1+ octave-check) #\'))
524 (make-string (1- (* -1 octave-check)) #\,))
527 (map-in-order (lambda (event)
528 (music->lily-string event parser))
529 (ly:music-property event 'articulations))))
531 (define-display-method NoteEvent (note parser)
532 (cond ((not (null? (ly:music-property note 'pitch))) ;; note
533 (simple-note->lily-string note parser))
534 ((not (null? (ly:music-property note 'drum-type))) ;; drum
535 (format #f "~a" (ly:music-property note 'drum-type)))
539 (define-display-method ClusterNoteEvent (note parser)
540 (simple-note->lily-string note parser))
542 (define-display-method RestEvent (rest parser)
543 (if (not (null? (ly:music-property rest 'pitch)))
544 (simple-note->lily-string rest parser)
547 (define-display-method MultiMeasureRestEvent (rest parser)
550 (define-display-method SkipEvent (rest parser)
553 (define-display-method MarkEvent (mark parser)
554 (let ((label (ly:music-property mark 'label)))
557 (format #f "\\mark ~a" (markup->lily-string label)))))
559 (define-display-method KeyChangeEvent (key parser)
560 (let ((pitch-alist (ly:music-property key 'pitch-alist))
561 (tonic (ly:music-property key 'tonic)))
562 (if (or (null? pitch-alist)
565 (let ((c-pitch-alist (ly:transpose-key-alist pitch-alist
566 (ly:pitch-diff (ly:make-pitch 0 0 0) tonic))))
567 (format #f "\\key ~a \\~a~a"
568 (note-name->lily-string (ly:music-property key 'tonic) parser)
571 (equal? (ly:parser-lookup parser mode) c-pitch-alist))
572 (symbol->string mode)
574 '(major minor ionian locrian aeolian mixolydian lydian phrygian dorian))
575 (new-line->lily-string))))))
577 (define-display-method RelativeOctaveCheck (octave parser)
578 (let ((pitch (ly:music-property octave 'pitch)))
579 (format #f "\\octave ~a~a"
580 (note-name->lily-string pitch parser)
581 (octave->lily-string pitch))))
583 (define-display-method VoiceSeparator (sep parser)
586 (define-display-method LigatureEvent (ligature parser)
587 (if (= START (ly:music-property ligature 'span-direction))
591 (define-display-method BarCheck (check parser)
592 (format #f "|~a" (new-line->lily-string)))
594 (define-display-method PesOrFlexaEvent (expr parser)
597 (define-display-method BassFigureEvent (figure parser)
598 (let ((alteration (ly:music-property figure 'alteration))
599 (fig (ly:music-property figure 'figure))
600 (bracket-start (ly:music-property figure 'bracket-start))
601 (bracket-stop (ly:music-property figure 'bracket-stop)))
603 (format #f "~a~a~a~a"
604 (if (null? bracket-start) "" "[")
605 (cond ((null? fig) "_")
606 ((markup? fig) (second fig)) ;; fig: (<number-markup> "number")
608 (if (null? alteration)
611 ((= alteration DOUBLE-FLAT) "--")
612 ((= alteration FLAT) "-")
613 ((= alteration NATURAL) "!")
614 ((= alteration SHARP) "+")
615 ((= alteration DOUBLE-SHARP) "++")
617 (if (null? bracket-stop) "" "]"))))
619 (define-display-method LyricEvent (lyric parser)
620 (let ((text (ly:music-property lyric 'text)))
621 (if (or (string? text)
622 (eqv? (first text) simple-markup))
623 ;; a string or a simple markup
624 (let ((string (if (string? text)
627 (if (string-match "(\"| |[0-9])" string)
628 ;; TODO check exactly in which cases double quotes should be used
629 (format #f "~s" string)
631 (markup->lily-string text))))
633 (define-display-method BreathingEvent (event parser)
640 (define-display-method AutoChangeMusic (m parser)
641 (format #f "\\autochange ~a"
642 (music->lily-string (ly:music-property m 'element) parser)))
644 (define-display-method ContextChange (m parser)
645 (format #f "\\change ~a = \"~a\""
646 (ly:music-property m 'change-to-type)
647 (ly:music-property m 'change-to-id)))
651 (define-display-method TimeScaledMusic (times parser)
652 (let* ((num (ly:music-property times 'numerator))
653 (den (ly:music-property times 'denominator))
654 (nd-gcd (gcd num den)))
655 (parameterize ((*force-line-break* #f)
656 (*time-factor-numerator* (/ num nd-gcd))
657 (*time-factor-denominator* (/ den nd-gcd)))
658 (format #f "\\times ~a/~a ~a"
661 (music->lily-string (ly:music-property times 'element) parser)))))
663 (define-display-method RelativeOctaveMusic (m parser)
664 (music->lily-string (ly:music-property m 'element) parser))
666 (define-display-method TransposedMusic (m parser)
667 (music->lily-string (ly:music-property m 'element) parser))
673 (define (repeat->lily-string expr repeat-type parser)
674 (format #f "\\repeat ~a ~a ~a ~a"
676 (ly:music-property expr 'repeat-count)
677 (music->lily-string (ly:music-property expr 'element) parser)
678 (let ((alternatives (ly:music-property expr 'elements)))
679 (if (null? alternatives)
681 (format #f "\\alternative { ~{~a ~}}"
682 (map-in-order (lambda (music)
683 (music->lily-string music parser))
686 (define-display-method VoltaRepeatedMusic (expr parser)
687 (repeat->lily-string expr "volta" parser))
689 (define-display-method UnfoldedRepeatedMusic (expr parser)
690 (repeat->lily-string expr "unfold" parser))
692 (define-display-method FoldedRepeatedMusic (expr parser)
693 (repeat->lily-string expr "fold" parser))
695 (define-display-method PercentRepeatedMusic (expr parser)
696 (repeat->lily-string expr "percent" parser))
698 (define-display-method TremoloRepeatedMusic (expr parser)
699 (let* ((count (ly:music-property expr 'repeat-count))
700 (dots (if (= 0 (modulo count 3)) 0 1))
701 (shift (- (log2 (if (= 0 dots)
704 (element (ly:music-property expr 'element))
706 (if (eqv? (ly:music-property element 'name) 'SequentialMusic)
708 (set! shift (1- shift))
709 (set! den-mult (length (ly:music-property element 'elements)))))
710 (music-map (lambda (m)
711 (let ((duration (ly:music-property m 'duration)))
712 (if (ly:duration? duration)
713 (let* ((dlog (ly:duration-log duration))
714 (ddots (ly:duration-dot-count duration))
715 (dfactor (ly:duration-factor duration))
717 (dden (cdr dfactor)))
718 (set! (ly:music-property m 'duration)
719 (ly:make-duration (- dlog shift)
720 ddots ;;(- ddots dots) ; ????
722 (/ dden den-mult))))))
725 (format #f "\\repeat tremolo ~a ~a"
727 (music->lily-string element parser))))
733 (define-display-method ContextSpeccedMusic (expr parser)
734 (let ((id (ly:music-property expr 'context-id))
735 (create-new (ly:music-property expr 'create-new))
736 (music (ly:music-property expr 'element))
737 (operations (ly:music-property expr 'property-operations))
738 (ctype (ly:music-property expr 'context-type)))
739 (format #f "~a ~a~a~a ~a"
740 (if (and (not (null? create-new)) create-new)
746 (format #f " = ~s" id))
747 (if (null? operations)
749 (format #f " \\with {~{~a~}~%~v_}"
750 (parameterize ((*indent* (+ (*indent*) 2)))
752 (format #f "~%~v_\\~a ~s"
756 (reverse operations)))
758 (parameterize ((*current-context* ctype))
759 (music->lily-string music parser)))))
761 ;; special cases: \figures \lyrics \drums
762 (define-extra-display-method ContextSpeccedMusic (expr parser)
763 (with-music-match (expr (music 'ContextSpeccedMusic
765 property-operations ?op
766 context-type ?context-type
769 (parameterize ((*explicit-mode* #f))
772 (format #f "\\figures ~a" (music->lily-string ?sequence parser)))
774 (format #f "\\lyrics ~a" (music->lily-string ?sequence parser)))
776 (format #f "\\drums ~a" (music->lily-string ?sequence parser)))
781 ;;; Context properties
783 (define-extra-display-method ContextSpeccedMusic (expr parser)
784 (let ((element (ly:music-property expr 'element))
785 (property-tuning? (make-music-type-predicate 'PropertySet
789 (sequence? (make-music-type-predicate 'SequentialMusic)))
790 (if (and (ly:music? element)
791 (or (property-tuning? element)
792 (and (sequence? element)
793 (every property-tuning? (ly:music-property element 'elements)))))
794 (parameterize ((*current-context* (ly:music-property expr 'context-type)))
795 (music->lily-string element parser))
798 (define (property-value->lily-string arg parser)
799 (cond ((ly:music? arg)
800 (music->lily-string arg parser))
802 (format #f "#~s" arg))
804 (markup->lily-string arg))
806 (format #f "#~a" (scheme-expr->lily-string arg)))))
808 (define-display-method PropertySet (expr parser)
809 (let ((property (ly:music-property expr 'symbol))
810 (value (ly:music-property expr 'value))
811 (once (ly:music-property expr 'once)))
812 (format #f "~a\\set ~a~a = ~a~a"
813 (if (and (not (null? once)))
816 (if (eqv? (*current-context*) 'Bottom)
818 (format #f "~a . " (*current-context*)))
820 (property-value->lily-string value parser)
821 (new-line->lily-string))))
823 (define-display-method PropertyUnset (expr parser)
824 (format #f "\\unset ~a~a~a"
825 (if (eqv? (*current-context*) 'Bottom)
827 (format #f "~a . " (*current-context*)))
828 (ly:music-property expr 'symbol)
829 (new-line->lily-string)))
831 ;;; Layout properties
833 (define-display-method OverrideProperty (expr parser)
834 (let* ((symbol (ly:music-property expr 'symbol))
835 (property-path (ly:music-property expr 'grob-property-path))
836 (properties (if (pair? property-path)
838 (list (ly:music-property expr 'grob-property))))
839 (value (ly:music-property expr 'grob-value))
840 (once (ly:music-property expr 'once)))
842 (format #f "~a\\override ~a~a #'~a = ~a~a"
847 (if (eqv? (*current-context*) 'Bottom)
849 (format #f "~a . " (*current-context*)))
851 (if (null? (cdr properties))
854 (property-value->lily-string value parser)
855 (new-line->lily-string))))
857 (define-display-method RevertProperty (expr parser)
858 (let ((symbol (ly:music-property expr 'symbol))
859 (properties (ly:music-property expr 'grob-property-path)))
860 (format #f "\\revert ~a~a #'~a~a"
861 (if (eqv? (*current-context*) 'Bottom)
863 (format #f "~a . " (*current-context*)))
865 (if (null? (cdr properties))
868 (new-line->lily-string))))
870 ;;; \melisma and \melismaEnd
871 (define-extra-display-method ContextSpeccedMusic (expr parser)
872 "If expr is a melisma, return \"\\melisma\", otherwise, return #f."
873 (with-music-match (expr (music 'ContextSpeccedMusic
874 element (music 'PropertySet
876 symbol 'melismaBusy)))
879 (define-extra-display-method ContextSpeccedMusic (expr parser)
880 "If expr is a melisma end, return \"\\melismaEnd\", otherwise, return #f."
881 (with-music-match (expr (music 'ContextSpeccedMusic
882 element (music 'PropertyUnset
883 symbol 'melismaBusy)))
887 (define-extra-display-method ContextSpeccedMusic (expr parser)
888 "If expr is a tempo, return \"\\tempo x = nnn\", otherwise return #f."
889 (with-music-match (expr (music 'ContextSpeccedMusic
890 element (music 'SequentialMusic
891 elements ((music 'PropertySet
892 symbol 'tempoWholesPerMinute)
895 symbol 'tempoUnitDuration)
898 symbol 'tempoUnitCount)))))
899 (format #f "\\tempo ~a = ~a"
900 (duration->lily-string ?unit-duration #:force-duration #t)
904 (define clef-name-alist #f)
905 (define-public (memoize-clef-names clefs)
906 "Initialize `clef-name-alist', if not already set."
907 (if (not clef-name-alist)
908 (set! clef-name-alist
909 (map (lambda (name+vals)
910 (cons (cdr name+vals)
914 (define-extra-display-method ContextSpeccedMusic (expr parser)
915 "If `expr' is a clef change, return \"\\clef ...\"
916 Otherwise, return #f."
917 (with-music-match (expr (music 'ContextSpeccedMusic
919 element (music 'SequentialMusic
920 elements ((music 'PropertySet
924 symbol 'middleCPosition)
927 symbol 'clefPosition)
929 value ?clef-octavation
930 symbol 'clefOctavation)))))
931 (let ((clef-prop+name (assoc (list ?clef-glyph ?clef-position 0)
934 (format #f "\\clef \"~a~{~a~a~}\"~a"
936 (cond ((= 0 ?clef-octavation)
938 ((> ?clef-octavation 0)
939 (list "^" (1+ ?clef-octavation)))
941 (list "_" (- 1 ?clef-octavation))))
942 (new-line->lily-string))
946 (define-extra-display-method ContextSpeccedMusic (expr parser)
947 "If `expr' is a time signature set, return \"\\time ...\".
948 Otherwise, return #f."
949 (with-music-match (expr (music
959 symbol 'timeSignatureFraction)
965 symbol 'measureLength)
969 symbol 'beatGrouping))))))
970 (if (null? ?grouping)
971 (format #f "\\time ~a/~a~a" (car ?num+den) (cdr ?num+den) (new-line->lily-string))
972 (format #f "#(set-time-signature ~a ~a '~s)~a"
973 (car ?num+den) (cdr ?num+den) ?grouping (new-line->lily-string)))))
976 (define-extra-display-method ContextSpeccedMusic (expr parser)
977 "If `expr' is a bar, return \"\\bar ...\".
978 Otherwise, return #f."
979 (with-music-match (expr (music 'ContextSpeccedMusic
981 element (music 'PropertySet
984 (format #f "\\bar \"~a\"~a" ?bar-type (new-line->lily-string))))
987 (define (duration->moment ly-duration)
988 (let ((log2 (ly:duration-log ly-duration))
989 (dots (ly:duration-dot-count ly-duration))
990 (num+den (ly:duration-factor ly-duration)))
991 (let* ((m (expt 2 (- log2)))
992 (factor (/ (car num+den) (cdr num+den))))
994 (delta (/ m 2) (/ delta 2)))
996 (set! m (+ m delta)))
998 (define moment-duration-alist (map (lambda (duration)
999 (cons (duration->moment duration)
1001 (append-map (lambda (log2)
1003 (ly:make-duration log2 dots 1 1))
1007 (define (moment->duration moment)
1008 (let ((result (assoc (- moment) moment-duration-alist =)))
1012 (define-extra-display-method ContextSpeccedMusic (expr parser)
1013 "If `expr' is a partial measure, return \"\\partial ...\".
1014 Otherwise, return #f."
1015 (with-music-match (expr (music
1016 'ContextSpeccedMusic
1018 'ContextSpeccedMusic
1019 context-type 'Timing
1023 symbol 'measurePosition))))
1024 (let ((duration (moment->duration (/ (ly:moment-main-numerator ?moment)
1025 (ly:moment-main-denominator ?moment)))))
1026 (and duration (format #f "\\partial ~a" (duration->lily-string duration
1027 #:force-duration #t))))))
1032 (define-display-method ApplyOutputEvent (applyoutput parser)
1033 (let ((proc (ly:music-property applyoutput 'procedure))
1034 (ctx (ly:music-property applyoutput 'context-type)))
1035 (format #f "\\applyOutput #'~a #~a"
1037 (or (procedure-name proc)
1038 (with-output-to-string
1040 (pretty-print (procedure-source proc))))))))
1042 (define-display-method ApplyContext (applycontext parser)
1043 (let ((proc (ly:music-property applycontext 'procedure)))
1044 (format #f "\\applyContext #~a"
1045 (or (procedure-name proc)
1046 (with-output-to-string
1048 (pretty-print (procedure-source proc))))))))
1051 (define-display-method PartCombineMusic (expr parser)
1052 (format #f "\\partcombine ~{~a ~}"
1053 (map-in-order (lambda (music)
1054 (music->lily-string music parser))
1055 (ly:music-property expr 'elements))))
1057 (define-extra-display-method PartCombineMusic (expr parser)
1058 (with-music-match (expr (music 'PartCombineMusic
1059 elements ((music 'UnrelativableMusic
1060 element (music 'ContextSpeccedMusic
1063 element ?sequence1))
1064 (music 'UnrelativableMusic
1065 element (music 'ContextSpeccedMusic
1068 element ?sequence2)))))
1069 (format #f "\\partcombine ~a~a~a"
1070 (music->lily-string ?sequence1 parser)
1071 (new-line->lily-string)
1072 (music->lily-string ?sequence2 parser))))
1074 (define-display-method UnrelativableMusic (expr parser)
1075 (music->lily-string (ly:music-property expr 'element) parser))
1078 (define-display-method QuoteMusic (expr parser)
1079 (or (with-music-match (expr (music
1081 quoted-voice-direction ?quoted-voice-direction
1082 quoted-music-name ?quoted-music-name
1083 quoted-context-id "cue"
1084 quoted-context-type 'Voice
1086 (format #f "\\cueDuring #~s #~a ~a"
1088 ?quoted-voice-direction
1089 (music->lily-string ?music parser)))
1090 (format #f "\\quoteDuring #~s ~a"
1091 (ly:music-property expr 'quoted-music-name)
1092 (music->lily-string (ly:music-property expr 'element) parser))))
1097 (define-display-method LineBreakEvent (expr parser)
1098 (if (null? (ly:music-property expr 'break-permission))
1102 (define-display-method PageBreakEvent (expr parser)
1103 (if (null? (ly:music-property expr 'break-permission))
1107 (define-display-method PageTurnEvent (expr parser)
1108 (if (null? (ly:music-property expr 'break-permission))
1112 (define-extra-display-method EventChord (expr parser)
1113 (with-music-match (expr (music 'EventChord
1114 elements ((music 'LineBreakEvent
1115 break-permission 'force)
1116 (music 'PageBreakEvent
1117 break-permission 'force))))
1120 (define-extra-display-method EventChord (expr parser)
1121 (with-music-match (expr (music 'EventChord
1122 elements ((music 'LineBreakEvent
1123 break-permission 'force)
1124 (music 'PageBreakEvent
1125 break-permission 'force)
1126 (music 'PageTurnEvent
1127 break-permission 'force))))
1135 (define-display-method LyricCombineMusic (expr parser)
1136 (format #f "\\lyricsto ~s ~a"
1137 (ly:music-property expr 'associated-context)
1138 (parameterize ((*explicit-mode* #f))
1139 (music->lily-string (ly:music-property expr 'element) parser))))
1142 (define-extra-display-method SimultaneousMusic (expr parser)
1143 (with-music-match (expr (music 'SimultaneousMusic
1144 elements ((music 'ContextSpeccedMusic
1147 element ?note-sequence)
1148 (music 'ContextSpeccedMusic
1149 context-type 'Lyrics
1151 element (music 'LyricCombineMusic
1152 associated-context ?associated-id
1153 element ?lyric-sequence)))))
1154 (if (string=? ?id ?associated-id)
1155 (format #f "~a~a \\addlyrics ~a"
1156 (music->lily-string ?note-sequence parser)
1157 (new-line->lily-string)
1158 (parameterize ((*explicit-mode* #f))
1159 (music->lily-string ?lyric-sequence parser)))