1 ;;;; music-functions.scm -- implement Scheme output routines for PostScript
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 (use-modules (ice-9 optargs))
10 ;;; ly:music-property with setter
11 ;;; (ly:music-property my-music 'elements)
12 ;;; ==> the 'elements property
13 ;;; (set! (ly:music-property my-music 'elements) value)
14 ;;; ==> set the 'elements property and return it
15 (define-public ly:music-property
16 (make-procedure-with-setter ly:music-property
17 ly:music-set-property!))
19 (define-public ly:grob-property
20 (make-procedure-with-setter ly:grob-property
21 ly:grob-set-property!))
23 (define-public (music-map function music)
24 "Apply @var{function} to @var{music} and all of the music it contains. "
25 (let ((es (ly:music-property music 'elements))
26 (e (ly:music-property music 'element)))
27 (set! (ly:music-property music 'elements)
28 (map (lambda (y) (music-map function y)) es))
30 (set! (ly:music-property music 'element)
31 (music-map function e)))
34 (define-public (music-filter pred? music)
35 "Filter out music expressions that do not satisfy PRED."
37 (define (inner-music-filter pred? music)
39 (let* ((es (ly:music-property music 'elements))
40 (e (ly:music-property music 'element))
41 (as (ly:music-property music 'articulations))
42 (filtered-as (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) as)))
43 (filtered-e (if (ly:music? e)
44 (inner-music-filter pred? e)
46 (filtered-es (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) es))))
47 (set! (ly:music-property music 'element) filtered-e)
48 (set! (ly:music-property music 'elements) filtered-es)
49 (set! (ly:music-property music 'articulations) filtered-as)
50 ;; if filtering emptied the expression, we remove it completely.
52 (and (eq? filtered-es '()) (not (ly:music? e))
53 (or (not (eq? es '()))
58 (set! music (inner-music-filter pred? music))
61 (make-music 'Music))) ;must return music.
63 (define-public (remove-tag tag)
67 (let* ((tags (ly:music-property m 'tags))
68 (res (memq tag tags)))
72 (define-public (display-music music)
73 "Display music, not done with music-map for clarity of presentation."
76 (let ((es (ly:music-property music 'elements))
77 (e (ly:music-property music 'element)))
78 (display (ly:mutable-music-properties music))
80 (begin (display "\nElements: {\n")
81 (map display-music es)
91 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
93 (define (shift-one-duration-log music shift dot)
94 " add SHIFT to ly:duration-log and optionally
95 a dot to any note encountered. This scales the music up by a factor
96 2^shift * (2 - (1/2)^dot)"
97 (let ((d (ly:music-property music 'duration)))
99 (let* ((cp (ly:duration-factor d))
100 (nd (ly:make-duration (+ shift (ly:duration-log d))
101 (+ dot (ly:duration-dot-count d))
104 (set! (ly:music-property music 'duration) nd)))
109 (define-public (shift-duration-log music shift dot)
110 (music-map (lambda (x) (shift-one-duration-log x shift dot))
114 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
117 (define-public (note-to-cluster music)
118 "Replace NoteEvents by ClusterNoteEvents."
119 (if (eq? (ly:music-property music 'name) 'NoteEvent)
120 (make-music 'ClusterNoteEvent
121 'pitch (ly:music-property music 'pitch)
122 'duration (ly:music-property music 'duration))
125 (define-public (notes-to-clusters music)
126 (music-map note-to-cluster music))
128 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
131 (define-public (unfold-repeats music)
133 This function replaces all repeats with unfold repeats. It was
134 written by Rune Zedeler. "
135 (let ((es (ly:music-property music 'elements))
136 (e (ly:music-property music 'element))
137 (n (ly:music-name music)))
138 (if (equal? n "Repeated_music")
140 (if (equal? (ly:music-property music 'iterator-ctor)
141 Chord_tremolo_iterator::constructor)
142 (shift-duration-log music (ly:intlog2 (ly:music-property music 'repeat-count)) 0))
143 (set! (ly:music-property music 'length)
144 Repeated_music::unfolded_music_length)
145 (set! (ly:music-property music 'start-moment-function)
146 Repeated_music::first_start)
147 (set! (ly:music-property music 'iterator-ctor)
148 Unfolded_repeat_iterator::constructor)))
150 (set! (ly:music-property music 'elements)
151 (map unfold-repeats es)))
153 (set! (ly:music-property music 'element)
158 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
159 ;; property setting music objs.
161 (define-public (make-grob-property-set grob gprop val)
162 "Make a Music expression that sets GPROP to VAL in GROB. Does a pop first,
163 i.e. this is not an override"
164 (make-music 'OverrideProperty
170 (define-public (make-grob-property-override grob gprop val)
171 "Make a Music expression that sets GPROP to VAL in GROB. Does a pop first,
172 i.e. this is not an override"
173 (make-music 'OverrideProperty
178 (define-public (make-grob-property-revert grob gprop)
179 "Revert the grob property GPROP for GROB."
180 (make-music 'OverrideProperty
182 'grob-property gprop))
184 (define direction-polyphonic-grobs
185 '(Stem Tie Rest Slur Script TextScript Dots DotColumn
188 (define-public (make-voice-props-set n)
189 (make-sequential-music
191 (map (lambda (x) (make-grob-property-set x 'direction
193 direction-polyphonic-grobs)
195 (make-grob-property-set 'NoteColumn 'horizontal-shift (quotient n 2))
196 (make-grob-property-set 'MultiMeasureRest 'staff-position (if (odd? n) -4 4))
201 (define-public (make-voice-props-revert)
202 (make-sequential-music
204 (map (lambda (x) (make-grob-property-revert x 'direction))
205 direction-polyphonic-grobs)
206 (list (make-grob-property-revert 'NoteColumn 'horizontal-shift)))))
209 (define*-public (context-spec-music m context #:optional id)
210 "Add \\context CONTEXT = ID to M. "
211 (let ((cm (make-music 'ContextSpeccedMusic
213 'context-type context)))
215 (set! (ly:music-property cm 'context-id) id))
219 (define*-public (descend-to-context m context)
220 "Like context-spec-music, but only descending. "
221 (let ((cm (context-spec-music m context)))
222 (ly:music-set-property! cm 'descend-only #t)
225 (define-public (make-apply-context func)
226 (make-music 'ApplyContext
229 (define-public (make-sequential-music elts)
230 (make-music 'SequentialMusic
233 (define-public (make-simultaneous-music elts)
234 (make-music 'SimultaneousMusic
237 (define-public (make-event-chord elts)
238 (make-music 'EventChord
241 (define-public (make-skip-music dur)
242 (make-music 'SkipMusic
248 (define-public (make-multi-measure-rest duration location)
249 (make-music 'MultiMeasureRestMusicGroup
251 'elements (list (make-music 'BarCheck
253 (make-event-chord (list (make-music 'MultiMeasureRestEvent
255 'duration duration)))
256 (make-music 'BarCheck
259 (define-public (glue-mm-rest-texts music)
260 "Check if we have R1*4-\\markup { .. }, and if applicable convert to
261 a property set for MultiMeasureRestNumber."
262 (define (script-to-mmrest-text script-music)
263 "Extract 'direction and 'text from SCRIPT-MUSIC, and transform into property sets."
264 (let ((dir (ly:music-property script-music 'direction))
265 (p (make-music 'MultiMeasureTextEvent
266 'text (ly:music-property script-music 'text))))
268 (set! (ly:music-property p 'direction) dir))
270 (if (eq? (ly:music-property music 'name) 'MultiMeasureRestMusicGroup)
271 (let* ((text? (lambda (x) (memq 'script-event (ly:music-property x 'types))))
272 (es (ly:music-property music 'elements))
273 (texts (map script-to-mmrest-text (filter text? es)))
274 (others (remove text? es)))
276 (set! (ly:music-property music 'elements)
277 (cons (make-event-chord texts) others)))))
281 (define-public (make-property-set sym val)
282 (make-music 'PropertySet
286 (define-public (make-ottava-set octavation)
287 (let ((m (make-music 'ApplyContext)))
288 (define (ottava-modify context)
289 "Either reset middleCPosition to the stored original, or remember
290 old middleCPosition, add OCTAVATION to middleCPosition, and set
291 OTTAVATION to `8va', or whatever appropriate."
292 (if (number? (ly:context-property context 'middleCPosition))
294 (let ((where (ly:context-property-where-defined context 'middleCPosition))
295 (oc0 (ly:context-property context 'originalCentralCPosition)))
296 (ly:context-set-property! context 'middleCPosition oc0)
297 (ly:context-unset-property where 'originalCentralCPosition)
298 (ly:context-unset-property where 'ottavation))
299 (let* ((where (ly:context-property-where-defined context 'middleCPosition))
300 (c0 (ly:context-property context 'middleCPosition))
301 (new-c0 (+ c0 (* -7 octavation)))
302 (string (cdr (assoc octavation '((2 . "15ma")
306 (-2 . "15ma bassa"))))))
307 (ly:context-set-property! context 'middleCPosition new-c0)
308 (ly:context-set-property! context 'originalCentralCPosition c0)
309 (ly:context-set-property! context 'ottavation string)))))
310 (set! (ly:music-property m 'procedure) ottava-modify)
311 (context-spec-music m 'Staff)))
313 (define-public (set-octavation ottavation)
314 (ly:export (make-ottava-set ottavation)))
316 (define-public (make-time-signature-set num den . rest)
317 " Set properties for time signature NUM/DEN.
318 Rest can contain a list of beat groupings "
319 (let* ((set1 (make-property-set 'timeSignatureFraction (cons num den)))
320 (beat (ly:make-moment 1 den))
321 (len (ly:make-moment num den))
322 (set2 (make-property-set 'beatLength beat))
323 (set3 (make-property-set 'measureLength len))
324 (set4 (make-property-set 'beatGrouping (if (pair? rest)
327 (basic (list set1 set2 set3 set4)))
329 (context-spec-music (make-sequential-music basic) 'Timing) 'Score)))
331 (define-public (make-mark-set label)
332 "make the music for the \\mark command."
333 (let* ((set (if (integer? label)
334 (context-spec-music (make-property-set 'rehearsalMark label)
337 (ev (make-music 'MarkEvent))
338 (ch (make-event-chord (list ev))))
340 (make-sequential-music (list set ch))
342 (set! (ly:music-property ev 'label) label)
345 (define-public (set-time-signature num den . rest)
346 (ly:export (apply make-time-signature-set `(,num ,den . ,rest))))
348 (define-public (make-penalty-music pen)
349 (make-music 'BreakEvent
352 (define-public (make-articulation name)
353 (make-music 'ArticulationEvent
354 'articulation-type name))
356 (define-public (make-lyric-event string duration)
357 (make-music 'LyricEvent
361 (define-public (make-span-event type spandir)
363 'span-direction spandir))
365 (define-public (set-mus-properties! m alist)
366 "Set all of ALIST as properties of M."
369 (set! (ly:music-property m (caar alist)) (cdar alist))
370 (set-mus-properties! m (cdr alist)))))
372 (define-public (music-separator? m)
374 (let ((ts (ly:music-property m 'types)))
375 (memq 'separator ts)))
378 ;;; splitting chords into voices.
379 (define (voicify-list lst number)
380 "Make a list of Musics.
382 voicify-list :: [ [Music ] ] -> number -> [Music]
383 LST is a list music-lists.
385 NUMBER is 0-base, i.e. Voice=1 (upstems) has number 0.
389 (cons (context-spec-music
390 (make-sequential-music
391 (list (make-voice-props-set number)
392 (make-simultaneous-music (car lst))))
393 'Voice (number->string (1+ number)))
394 (voicify-list (cdr lst) (1+ number)))))
396 (define (voicify-chord ch)
397 "Split the parts of a chord into different Voices using separator"
398 (let ((es (ly:music-property ch 'elements)))
399 (set! (ly:music-property ch 'elements)
400 (voicify-list (split-list es music-separator?) 0))
403 (define-public (voicify-music m)
404 "Recursively split chords that are separated with \\ "
405 (if (not (ly:music? m))
407 (error "not music!")))
408 (let ((es (ly:music-property m 'elements))
409 (e (ly:music-property m 'element)))
411 (set! (ly:music-property m 'elements) (map voicify-music es)))
413 (set! (ly:music-property m 'element) (voicify-music e)))
414 (if (and (equal? (ly:music-name m) "Simultaneous_music")
415 (reduce (lambda (x y ) (or x y)) #f (map music-separator? es)))
416 (set! m (context-spec-music (voicify-chord m) 'Staff)))
419 (define-public (empty-music)
420 (ly:export (make-music 'Music)))
423 ; Make a function that checks score element for being of a specific type.
424 (define-public (make-type-checker symbol)
427 ;;(eq? #t (ly:grob-property elt symbol))
428 (not (eq? #f (memq symbol (ly:grob-property elt 'interfaces))))))
430 (define-public ((outputproperty-compatibility func sym val) grob g-context ao-context)
432 (set! (ly:grob-property grob sym) val)))
435 (define-public ((set-output-property grob-name symbol val) grob grob-c context)
438 \\applyoutput #(set-output-property 'Clef 'extra-offset '(0 . 1))
441 (let ((meta (ly:grob-property grob 'meta)))
442 (if (equal? (cdr (assoc 'name meta)) grob-name)
443 (set! (ly:grob-property grob symbol) val))))
447 (define-public (smart-bar-check n)
448 "Make a bar check that checks for a specific bar number.
450 (let ((m (make-music 'ApplyContext)))
452 (let* ((bn (ly:context-property tr 'currentBarNumber)))
456 (format "Bar check failed, we should have reached ~a, instead at ~a\n"
458 (set! (ly:music-property m 'procedure) checker)
461 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
462 ;; warn for bare chords at start.
464 (define (has-request-chord elts)
465 (reduce (lambda (x y) (or x y)) #f
467 (equal? (ly:music-name x) "Request_chord"))
470 (define (ly:music-message music msg)
471 (let ((ip (ly:music-property music 'origin)))
472 (if (ly:input-location? ip)
473 (ly:input-message ip msg)
476 (define (check-start-chords music)
477 "Check music expression for a Simultaneous_music containing notes\n(ie. Request_chords),
478 without context specification. Called from parser."
479 (let ((es (ly:music-property music 'elements))
480 (e (ly:music-property music 'element))
481 (name (ly:music-name music)))
482 (cond ((equal? name "Context_specced_music") #t)
483 ((equal? name "Simultaneous_music")
484 (if (has-request-chord es)
485 (ly:music-message music "Starting score with a chord.\nPlease insert an explicit \\context before chord")
486 (map check-start-chords es)))
487 ((equal? name "Sequential_music")
489 (check-start-chords (car es))))
490 (else (if (ly:music? e) (check-start-chords e)))))
495 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
497 ;; setting stuff for grace context.
500 (define (vector-extend v x)
501 "Make a new vector consisting of V, with X added to the end."
503 ((n (vector-length v))
504 (nv (make-vector (+ n 1) '())))
505 (vector-move-left! v 0 n nv 0)
509 (define (vector-map f v)
510 "Map F over V. This function returns nothing."
511 (do ((n (vector-length v))
514 (f (vector-ref v i))))
516 (define (vector-reverse-map f v)
517 "Map F over V, N to 0 order. This function returns nothing."
518 (do ((i (- (vector-length v) 1) (- i 1)))
520 (f (vector-ref v i))))
522 ;; TODO: make a remove-grace-property too.
523 (define-public (add-grace-property context-name grob sym val)
524 "Set SYM=VAL for GROB in CONTEXT-NAME. "
525 (define (set-prop context)
526 (let* ((where (ly:context-property-where-defined context 'graceSettings))
527 (current (ly:context-property where 'graceSettings))
528 (new-settings (vector-extend current (list context-name grob sym val))))
529 (ly:context-set-property! where 'graceSettings new-settings)))
530 (ly:export (context-spec-music (make-apply-context set-prop) 'Voice)))
533 (define-public (set-start-grace-properties context)
534 (define (execute-1 x)
535 (let ((tr (ly:context-find context (car x))))
537 (ly:context-pushpop-property tr (cadr x) (caddr x) (cadddr x)))))
539 (let ((props (ly:context-property context 'graceSettings)))
541 (vector-map execute-1 props))))
543 (define-public (set-stop-grace-properties context)
544 (define (execute-1 x)
545 (let ((tr (ly:context-find context (car x))))
547 (ly:context-pushpop-property tr (cadr x) (caddr x)))))
549 (let ((props (ly:context-property context 'graceSettings)))
551 (vector-reverse-map execute-1 props))))
553 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
554 ;; switch it on here, so parsing and init isn't checked (too slow!)
556 ;; automatic music transformations.
558 (define (switch-on-debugging m)
559 (if (defined? 'set-debug-cell-accesses!)
560 (set-debug-cell-accesses! 15000))
563 (define-public toplevel-music-functions
565 ;; check-start-chords ; ; no longer needed with chord syntax.
567 (lambda (x) (music-map glue-mm-rest-texts x))
568 ;; switch-on-debugging
574 (define (apply-durations lyric-music durations)
575 (define (apply-duration music)
576 (if (and (not (equal? (ly:music-length music) ZERO-MOMENT))
577 (ly:duration? (ly:music-property music 'duration)))
579 (set! (ly:music-property music 'duration) (car durations))
580 (set! durations (cdr durations)))))
582 (music-map apply-duration lyric-music))
585 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
588 (define-public ((add-balloon-text object-name text off) grob orig-context cur-context)
589 "Usage: see input/regression/balloon.ly "
590 (let* ((meta (ly:grob-property grob 'meta))
591 (nm (if (pair? meta) (cdr (assoc 'name meta)) "nonexistant"))
592 (cb (ly:grob-property grob 'print-function)))
593 (if (equal? nm object-name)
595 (set! (ly:grob-property grob 'print-function) Balloon_interface::print)
596 (set! (ly:grob-property grob 'balloon-original-callback) cb)
597 (set! (ly:grob-property grob 'balloon-text) text)
598 (set! (ly:grob-property grob 'balloon-text-offset) off)
599 (set! (ly:grob-property grob 'balloon-text-props) '((font-family . roman)))))))
601 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
604 (define-public (set-accidentals-properties extra-natural
608 (make-sequential-music
609 (append (if (boolean? extra-natural)
610 (list (make-property-set 'extraNatural extra-natural))
612 (list (make-property-set 'autoAccidentals auto-accs)
613 (make-property-set 'autoCautionaries auto-cauts))))
616 (define-public (set-accidental-style style . rest)
617 "Set accidental style to STYLE. Optionally takes a context argument,
618 e.g. 'Staff or 'Voice. The context defaults to Voice, except for piano styles, which
619 use PianoStaff as a context. "
620 (let ((context (if (pair? rest)
622 (pcontext (if (pair? rest)
623 (car rest) 'PianoStaff)))
626 ;; accidentals as they were common in the 18th century.
627 ((equal? style 'default)
628 (set-accidentals-properties #t '(Staff (same-octave . 0))
630 ;; accidentals from one voice do NOT get cancelled in other voices
631 ((equal? style 'voice)
632 (set-accidentals-properties #t '(Voice (same-octave . 0))
634 ;; accidentals as suggested by Kurt Stone, Music Notation in the 20th century.
635 ;; This includes all the default accidentals, but accidentals also needs cancelling
636 ;; in other octaves and in the next measure.
637 ((equal? style 'modern)
638 (set-accidentals-properties #f '(Staff (same-octave . 0) (any-octave . 0) (same-octave . 1))
640 ;; the accidentals that Stone adds to the old standard as cautionaries
641 ((equal? style 'modern-cautionary)
642 (set-accidentals-properties #f '(Staff (same-octave . 0))
643 '(Staff (any-octave . 0) (same-octave . 1))
645 ;; Multivoice accidentals to be read both by musicians playing one voice
646 ;; and musicians playing all voices.
647 ;; Accidentals are typeset for each voice, but they ARE cancelled across voices.
648 ((equal? style 'modern-voice)
649 (set-accidentals-properties #f
650 '(Voice (same-octave . 0) (any-octave . 0) (same-octave . 1)
651 Staff (same-octave . 0) (any-octave . 0) (same-octave . 1))
654 ;; same as modernVoiceAccidental eccept that all special accidentals are typeset
656 ((equal? style 'modern-voice-cautionary)
657 (set-accidentals-properties #f
658 '(Voice (same-octave . 0) )
659 '(Voice (any-octave . 0) (same-octave . 1)
660 Staff (same-octave . 0) (any-octave . 0) (same-octave . 1))
662 ;; stone's suggestions for accidentals on grand staff.
663 ;; Accidentals are cancelled across the staves in the same grand staff as well
664 ((equal? style 'piano)
665 (set-accidentals-properties #f
666 '( Staff (same-octave . 0) (any-octave . 0) (same-octave . 1)
667 PianoStaff (any-octave . 0) (same-octave . 1))
670 ((equal? style 'piano-cautionary)
671 (set-accidentals-properties #f
672 '(Staff (same-octave . 0))
673 '(Staff (any-octave . 0) (same-octave . 1)
674 PianoStaff (any-octave . 0) (same-octave . 1))
676 ;; do not set localKeySignature when a note alterated differently from
677 ;; localKeySignature is found.
678 ;; Causes accidentals to be printed at every note instead of
679 ;; remembered for the duration of a measure.
680 ;; accidentals not being remembered, causing accidentals always to be typeset relative to the time signature
681 ((equal? style 'forget)
682 (set-accidentals-properties '()
683 '(Staff (same-octave . -1))
685 ;; Do not reset the key at the start of a measure. Accidentals will be
686 ;; printed only once and are in effect until overridden, possibly many
688 ((equal? style 'no-reset)
689 (set-accidentals-properties '()
690 '(Staff (same-octave . #t))
694 (ly:warn (string-append "Unknown accidental style: " (symbol->string style)))
695 (make-sequential-music '()))))))