scm/define-music-display-methods.scm

   1 ;;; define-music-display-methods.scm -- data for displaying music
   2 ;;; expressions using LilyPond notation.
   3 ;;;
   4 ;;; Copyright (C) 2005--2010 Nicolas Sceaux  <nicolas.sceaux@free.fr>
   5 ;;;
   6
   7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   8 ;;;
   9 ;;; Display method implementation
  10 ;;;
  11
  12 (define-module (scm display-lily))
  13
  14 ;;;
  15 ;;; Scheme forms
  16 ;;;
  17 (define (scheme-expr->lily-string scm-arg)
  18   (cond ((or (number? scm-arg)
  19              (string? scm-arg))
  20          (format #f "~s" scm-arg))
  21         ((or (symbol? scm-arg)
  22              (list? scm-arg))
  23          (format #f "'~s" scm-arg))
  24         ((procedure? scm-arg)
  25          (format #f "~a"
  26                  (or (procedure-name scm-arg)
  27                      (with-output-to-string
  28                        (lambda ()
  29                          (pretty-print (procedure-source scm-arg)))))))
  30         (else
  31          (format #f "~a"
  32                  (with-output-to-string
  33                    (lambda ()
  34                      (display-scheme-music scm-arg)))))))
  35 ;;;
  36 ;;; Markups
  37 ;;;
  38
  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)
  46     (cond ((string? arg)
  47            (format #f "~s" 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)
  55     (if (string? expr)
  56         (format #f "~s" expr)
  57         (let ((cmd (car expr))
  58               (args (cdr expr)))
  59           (if (eqv? cmd simple-markup) ;; a simple markup
  60               (format #f "~s" (car args))
  61               (format #f "\\~a~{ ~a~}"
  62                       (proc->command cmd)
  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)))
  68         (else
  69          (format #f "\\markup ~a"
  70                  (markup->lily-string-aux markup-expr)))))
  71
  72 ;;;
  73 ;;; pitch names
  74 ;;;
  75
  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))
  79        (result #f result))
  80       ((or result (null? alist)) result)
  81     (if (and (car alist) (test item (cdar alist)))
  82         (set! result (car alist)))))
  83
  84 (define-public (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=)))
  91     (if result
  92         (car result)
  93         #f)))
  94
  95 (define-public (octave->lily-string pitch)
  96   (let ((octave (ly:pitch-octave pitch)))
  97     (cond ((>= octave 0)
  98            (make-string (1+ octave) #\'))
  99           ((< octave -1)
 100            (make-string (1- (* -1 octave)) #\,))
 101           (else ""))))
 102
 103 ;;;
 104 ;;; durations
 105 ;;;
 106 (define*-public (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
 115                          ((-1) "\\breve")
 116                          ((-2) "\\longa")
 117                          ((-3) "\\maxima")
 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))))))
 126                          (cond (den?
 127                                 (format #f "*~a/~a" (car num+den) (cdr num+den)))
 128                                (num?
 129                                 (format #f "*~a" (car num+den)))
 130                                (else ""))))
 131         "")))
 132
 133 ;;;
 134 ;;; post events
 135 ;;;
 136
 137 (define post-event?
 138   (make-music-type-predicate
 139     'AbsoluteDynamicEvent
 140     'ArpeggioEvent
 141     'ArticulationEvent
 142     'BeamEvent
 143     'BeamForbidEvent
 144     'BendAfterEvent
 145     'CrescendoEvent
 146     'DecrescendoEvent
 147     'EpisemaEvent
 148     'ExtenderEvent
 149     'FingeringEvent
 150     'GlissandoEvent
 151     'HarmonicEvent
 152     'HyphenEvent
 153     'MultiMeasureTextEvent
 154     'NoteGroupingEvent
 155     'PhrasingSlurEvent
 156     'SlurEvent
 157     'SostenutoEvent
 158     'StringNumberEvent
 159     'SustainEvent
 160     'TextScriptEvent
 161     'TextSpanEvent
 162     'TieEvent
 163     'TremoloEvent
 164     'TrillSpanEvent
 165     'TupletSpanEvent
 166     'UnaCordaEvent))
 167
 168 (define* (event-direction->lily-string event #:optional (required #t))
 169   (let ((direction (ly:music-property event 'direction)))
 170     (cond ((or (not direction) (null? direction) (= CENTER direction))
 171            (if required "-" ""))
 172           ((= UP direction) "^")
 173           ((= DOWN direction) "_")
 174           (else ""))))
 175
 176 (define-macro (define-post-event-display-method type vars direction-required str)
 177   `(define-display-method ,type ,vars
 178      (format #f "~a~a"
 179              (event-direction->lily-string ,(car vars) ,direction-required)
 180              ,str)))
 181
 182 (define-macro (define-span-event-display-method type vars direction-required str-start str-stop)
 183   `(define-display-method ,type ,vars
 184      (format #f "~a~a"
 185              (event-direction->lily-string ,(car vars) ,direction-required)
 186              (if (= START (ly:music-property ,(car vars) 'span-direction))
 187                  ,str-start
 188                  ,str-stop))))
 189
 190 (define-display-method HyphenEvent (event parser)
 191   " --")
 192 (define-display-method ExtenderEvent (event parser)
 193   " __")
 194 (define-display-method TieEvent (event parser)
 195   " ~")
 196 (define-display-method BeamForbidEvent (event parser)
 197   "\\noBeam")
 198 (define-display-method StringNumberEvent (event parser)
 199   (format #f "\\~a" (ly:music-property event 'string-number)))
 200
 201
 202 (define-display-method TremoloEvent (event parser)
 203   (let ((tremolo-type (ly:music-property event 'tremolo-type)))
 204     (format #f ":~a" (if (= 0 tremolo-type)
 205                          ""
 206                          tremolo-type))))
 207
 208 (define-post-event-display-method ArticulationEvent (event parser) #t
 209   (let ((articulation  (ly:music-property event 'articulation-type)))
 210     (case (string->symbol articulation)
 211       ((marcato) "^")
 212       ((stopped) "+")
 213       ((tenuto)  "-")
 214       ((staccatissimo) "|")
 215       ((accent) ">")
 216       ((staccato) ".")
 217       ((portato) "_")
 218       (else (format #f "\\~a" articulation)))))
 219
 220 (define-post-event-display-method FingeringEvent (event parser) #t
 221   (ly:music-property event 'digit))
 222
 223 (define-post-event-display-method TextScriptEvent (event parser) #t
 224   (markup->lily-string (ly:music-property event 'text)))
 225
 226 (define-post-event-display-method MultiMeasureTextEvent (event parser) #t
 227   (markup->lily-string (ly:music-property event 'text)))
 228
 229 (define-post-event-display-method BendAfterEvent (event parser) #t
 230   (format #f "\\bendAfter #~a" (ly:music-property event 'delta-step)))
 231
 232 (define-post-event-display-method HarmonicEvent (event parser) #f "\\harmonic")
 233 (define-post-event-display-method GlissandoEvent (event parser) #t "\\glissando")
 234 (define-post-event-display-method ArpeggioEvent (event parser) #t "\\arpeggio")
 235 (define-post-event-display-method AbsoluteDynamicEvent (event parser) #f
 236   (format #f "\\~a" (ly:music-property event 'text)))
 237
 238 (define-span-event-display-method BeamEvent (event parser) #f "[" "]")
 239 (define-span-event-display-method SlurEvent (event parser) #f "(" ")")
 240 (define-span-event-display-method CrescendoEvent (event parser) #f "\\<" "\\!")
 241 (define-span-event-display-method DecrescendoEvent (event parser) #f "\\>" "\\!")
 242 (define-span-event-display-method EpisemaEvent (event parser) #f "\\episemInitium" "\\episemFinis")
 243 (define-span-event-display-method PhrasingSlurEvent (event parser) #f "\\(" "\\)")
 244 (define-span-event-display-method SustainEvent (event parser) #f "\\sustainOn" "\\sustainOff")
 245 (define-span-event-display-method SostenutoEvent (event parser) #f "\\sostenutoOn" "\\sostenutoOff")
 246 (define-span-event-display-method TextSpanEvent (event parser) #f "\\startTextSpan" "\\stopTextSpan")
 247 (define-span-event-display-method TrillSpanEvent (event parser) #f "\\startTrillSpan" "\\stopTrillSpan")
 248 (define-span-event-display-method StaffSpanEvent (event parser) #f "\\startStaff" "\\stopStaff")
 249 (define-span-event-display-method NoteGroupingEvent (event parser) #f "\\startGroup" "\\stopGroup")
 250 (define-span-event-display-method UnaCordaEvent (event parser) #f "\\unaCorda" "\\treCorde")
 251
 252 ;;;
 253 ;;; Graces
 254 ;;;
 255
 256 (define-display-method GraceMusic (expr parser)
 257   (format #f "\\grace ~a"
 258           (music->lily-string (ly:music-property expr 'element) parser)))
 259
 260 ;; \acciaccatura \appoggiatura \grace
 261 ;; TODO: it would be better to compare ?start and ?stop
 262 ;; with startAppoggiaturaMusic and stopAppoggiaturaMusic,
 263 ;; using a custom music equality predicate.
 264 (define-extra-display-method GraceMusic (expr parser)
 265   "Display method for appoggiatura."
 266   (with-music-match (expr (music
 267                            'GraceMusic
 268                            element (music
 269                                     'SequentialMusic
 270                                     elements (?start
 271                                               ?music
 272                                               ?stop))))
 273     ;; we check whether ?start and ?stop look like
 274     ;; startAppoggiaturaMusic stopAppoggiaturaMusic
 275     (and (with-music-match (?start (music
 276                                     'SequentialMusic
 277                                     elements ((music
 278                                                'EventChord
 279                                                elements ((music
 280                                                           'SkipEvent
 281                                                           duration (ly:make-duration 0 0 0 1))
 282                                                          (music
 283                                                           'SlurEvent
 284                                                           span-direction START))))))
 285                            #t)
 286           (with-music-match (?stop (music
 287                                     'SequentialMusic
 288                                     elements ((music
 289                                                'EventChord
 290                                                elements ((music
 291                                                           'SkipEvent
 292                                                           duration (ly:make-duration 0 0 0 1))
 293                                                          (music
 294                                                           'SlurEvent
 295                                                           span-direction STOP))))))
 296             (format #f "\\appoggiatura ~a" (music->lily-string ?music parser))))))
 297
 298
 299 (define-extra-display-method GraceMusic (expr parser)
 300   "Display method for acciaccatura."
 301   (with-music-match (expr (music
 302                            'GraceMusic
 303                            element (music
 304                                     'SequentialMusic
 305                                     elements (?start
 306                                               ?music
 307                                               ?stop))))
 308     ;; we check whether ?start and ?stop look like
 309     ;; startAcciaccaturaMusic stopAcciaccaturaMusic
 310     (and (with-music-match (?start (music
 311                                     'SequentialMusic
 312                                     elements ((music
 313                                                'EventChord
 314                                                elements ((music
 315                                                           'SkipEvent
 316                                                           duration (ly:make-duration 0 0 0 1))
 317                                                          (music
 318                                                           'SlurEvent
 319                                                           span-direction START)))
 320                                               (music
 321                                                'ContextSpeccedMusic
 322                                                element (music
 323                                                         'OverrideProperty
 324                                                         grob-property-path '(stroke-style)
 325                                                         grob-value "grace"
 326                                                         symbol 'Stem)))))
 327                            #t)
 328          (with-music-match (?stop (music
 329                                    'SequentialMusic
 330                                    elements ((music
 331                                               'ContextSpeccedMusic
 332                                               element (music
 333                                                        'RevertProperty
 334                                                        grob-property-path '(stroke-style)
 335                                                        symbol 'Stem))
 336                                              (music
 337                                               'EventChord
 338                                               elements ((music
 339                                                          'SkipEvent
 340                                                          duration (ly:make-duration 0 0 0 1))
 341                                                         (music
 342                                                          'SlurEvent
 343                                                          span-direction STOP))))))
 344            (format #f "\\acciaccatura ~a" (music->lily-string ?music parser))))))
 345
 346 (define-extra-display-method GraceMusic (expr parser)
 347   "Display method for grace."
 348   (with-music-match (expr (music
 349                            'GraceMusic
 350                            element (music
 351                                     'SequentialMusic
 352                                     elements (?start
 353                                               ?music
 354                                               ?stop))))
 355     ;; we check whether ?start and ?stop look like
 356     ;; startGraceMusic stopGraceMusic
 357     (and (null? (ly:music-property ?start 'elements))
 358          (null? (ly:music-property ?stop 'elements))
 359          (format #f "\\grace ~a" (music->lily-string ?music parser)))))
 360
 361 ;;;
 362 ;;; Music sequences
 363 ;;;
 364
 365 (define-display-method SequentialMusic (seq parser)
 366   (let ((force-line-break (and (*force-line-break*)
 367                                ;; hm
 368                                (> (length (ly:music-property seq 'elements))
 369                                   (*max-element-number-before-break*))))
 370         (elements (ly:music-property seq 'elements))
 371         (chord? (make-music-type-predicate 'EventChord))
 372         (cluster? (make-music-type-predicate 'ClusterNoteEvent))
 373         (note? (make-music-type-predicate 'NoteEvent)))
 374     (format #f "~a~a{~v%~v_~{~a ~}~v%~v_}"
 375             (if (any (lambda (e)
 376                        (and (chord? e)
 377                             (any cluster? (ly:music-property e 'elements))))
 378                      elements)
 379                 "\\makeClusters "
 380                 "")
 381             (if (*explicit-mode*)
 382                 ;; if the sequence contains EventChord which contains figures ==> figuremode
 383                 ;; if the sequence contains EventChord which contains lyrics ==> lyricmode
 384                 ;; if the sequence contains EventChord which contains drum notes ==> drummode
 385                 (cond ((any (lambda (chord)
 386                               (any (make-music-type-predicate 'BassFigureEvent)
 387                                    (ly:music-property chord 'elements)))
 388                             (filter chord? elements))
 389                        "\\figuremode ")
 390                       ((any (lambda (chord)
 391                               (any (make-music-type-predicate 'LyricEvent)
 392                                    (ly:music-property chord 'elements)))
 393                             (filter chord? elements))
 394                        "\\lyricmode ")
 395                       ((any (lambda (chord)
 396                               (any (lambda (event)
 397                                      (and (note? event)
 398                                           (not (null? (ly:music-property event 'drum-type)))))
 399                                    (ly:music-property chord 'elements)))
 400                             (filter chord? elements))
 401                        "\\drummode ")
 402                       (else ;; TODO: other modes?
 403                        ""))
 404                 "")
 405             (if force-line-break 1 0)
 406             (if force-line-break (+ 2 (*indent*)) 1)
 407             (parameterize ((*indent* (+ 2 (*indent*))))
 408                           (map-in-order (lambda (music)
 409                                           (music->lily-string music parser))
 410                                         elements))
 411             (if force-line-break 1 0)
 412             (if force-line-break (*indent*) 0))))
 413
 414 (define-display-method SimultaneousMusic (sim parser)
 415   (parameterize ((*indent* (+ 3 (*indent*))))
 416     (format #f "<< ~{~a ~}>>"
 417             (map-in-order (lambda (music)
 418                             (music->lily-string music parser))
 419                           (ly:music-property sim 'elements)))))
 420
 421 (define-extra-display-method SimultaneousMusic (expr parser)
 422   "If `sim' is an \afterGrace expression, return \"\\afterGrace ...\".
 423 Otherwise, return #f."
 424   ;; TODO: do something with afterGraceFraction?
 425   (with-music-match (expr (music 'SimultaneousMusic
 426                                  elements (?before-grace
 427                                            (music 'SequentialMusic
 428                                                   elements ((music 'SkipMusic)
 429                                                             (music 'GraceMusic
 430                                                                    element ?grace))))))
 431     (format #f "\\afterGrace ~a ~a"
 432             (music->lily-string ?before-grace parser)
 433             (music->lily-string ?grace parser))))
 434
 435 ;;;
 436 ;;; Chords
 437 ;;;
 438
 439 (define-display-method EventChord (chord parser)
 440   ;; event_chord : simple_element post_events
 441   ;;               | command_element
 442   ;;               | note_chord_element
 443
 444   ;; TODO : tagged post_events
 445   ;; post_events : ( post_event | tagged_post_event )*
 446   ;; tagged_post_event: '-' \tag embedded_scm post_event
 447
 448   (let* ((elements (ly:music-property chord 'elements))
 449          (simple-elements (filter (make-music-type-predicate
 450                                    'NoteEvent 'ClusterNoteEvent 'RestEvent
 451                                    'MultiMeasureRestEvent 'SkipEvent 'LyricEvent)
 452                                   elements)))
 453     (if ((make-music-type-predicate 'StaffSpanEvent 'BreathingEvent) (car elements))
 454         ;; first, a special case: StaffSpanEvent (\startStaff, \stopStaff)
 455         ;; and BreathingEvent (\breathe)
 456         (music->lily-string (car elements) parser)
 457         (if (and (not (null? simple-elements))
 458                  (null? (cdr simple-elements))
 459                  ;; special case: if this simple_element has a HarmonicEvent in its
 460                  ;; 'articulations list, it should be interpreted instead as a
 461                  ;; note_chord_element, since \harmonic only works inside chords,
 462                  ;; even for single notes, e.g., < c\harmonic >
 463                  (null? (filter (make-music-type-predicate 'HarmonicEvent)
 464                                 (ly:music-property (car simple-elements) 'articulations))))
 465             ;; simple_element : note | figure | rest | mmrest | lyric_element | skip
 466             (let* ((simple-element (car simple-elements))
 467                    (duration (ly:music-property simple-element 'duration))
 468                    (lily-string (format #f "~a~a~a~{~a ~}"
 469                                         (music->lily-string simple-element parser)
 470                                         (duration->lily-string duration)
 471                                         (if (and ((make-music-type-predicate 'RestEvent) simple-element)
 472                                                  (ly:pitch? (ly:music-property simple-element 'pitch)))
 473                                             "\\rest"
 474                                             "")
 475                                         (map-in-order (lambda (music)
 476                                                         (music->lily-string music parser))
 477                                                       (filter post-event? elements)))))
 478               (*previous-duration* duration)
 479               lily-string)
 480             (let ((chord-elements (filter (make-music-type-predicate
 481                                            'NoteEvent 'ClusterNoteEvent 'BassFigureEvent)
 482                                           elements))
 483                   (post-events (filter post-event? elements)))
 484               (if (not (null? chord-elements))
 485                   ;; note_chord_element : '<' (notepitch | drumpitch)* '>" duration post_events
 486                   (let ((lily-string (format #f "< ~{~a ~}>~a~{~a ~}"
 487                                              (map-in-order (lambda (music)
 488                                                              (music->lily-string music parser))
 489                                                            chord-elements)
 490                                              (duration->lily-string (ly:music-property (car chord-elements)
 491                                                                                        'duration))
 492                                              (map-in-order (lambda (music)
 493                                                              (music->lily-string music parser))
 494                                                            post-events))))
 495                     (*previous-duration* (ly:music-property (car chord-elements) 'duration))
 496                     lily-string)
 497                   ;; command_element
 498                   (format #f "~{~a ~}" (map-in-order (lambda (music)
 499                                                        (music->lily-string music parser))
 500                                                      elements))))))))
 501
 502 (define-display-method MultiMeasureRestMusic (mmrest parser)
 503   (let* ((dur (ly:music-property mmrest 'duration))
 504          (ly (format #f "R~a~{~a ~}"
 505                      (duration->lily-string dur)
 506                      (map-in-order (lambda (music)
 507                                      (music->lily-string music parser))
 508                                    (ly:music-property mmrest 'articulations)))))
 509     (*previous-duration* dur)
 510     ly))
 511
 512 (define-display-method SkipMusic (skip parser)
 513   (format #f "\\skip ~a" (duration->lily-string (ly:music-property skip 'duration) #:force-duration #t)))
 514
 515 ;;;
 516 ;;; Notes, rests, skips...
 517 ;;;
 518
 519 (define (simple-note->lily-string event parser)
 520   (format #f "~a~a~a~a~{~a~}" ; pitchname octave !? octave-check articulations
 521           (note-name->lily-string (ly:music-property event 'pitch) parser)
 522           (octave->lily-string (ly:music-property event 'pitch))
 523           (let ((forced (ly:music-property event 'force-accidental))
 524                 (cautionary (ly:music-property event 'cautionary)))
 525             (cond ((and (not (null? forced))
 526                         forced
 527                         (not (null? cautionary))
 528                         cautionary)
 529                    "?")
 530                   ((and (not (null? forced)) forced) "!")
 531                   (else "")))
 532           (let ((octave-check (ly:music-property event 'absolute-octave)))
 533             (if (not (null? octave-check))
 534                 (format #f "=~a" (cond ((>= octave-check 0)
 535                                         (make-string (1+ octave-check) #\'))
 536                                        ((< octave-check -1)
 537                                         (make-string (1- (* -1 octave-check)) #\,))
 538                                        (else "")))
 539                 ""))
 540           (map-in-order (lambda (event)
 541                           (music->lily-string event parser))
 542                         (ly:music-property event 'articulations))))
 543
 544 (define-display-method NoteEvent (note parser)
 545   (cond ((not (null? (ly:music-property note 'pitch))) ;; note
 546          (simple-note->lily-string note parser))
 547         ((not (null? (ly:music-property note 'drum-type))) ;; drum
 548          (format #f "~a" (ly:music-property note 'drum-type)))
 549         (else ;; unknown?
 550          "")))
 551
 552 (define-display-method ClusterNoteEvent (note parser)
 553   (simple-note->lily-string note parser))
 554
 555 (define-display-method RestEvent (rest parser)
 556   (if (not (null? (ly:music-property rest 'pitch)))
 557       (simple-note->lily-string rest parser)
 558       "r"))
 559
 560 (define-display-method MultiMeasureRestEvent (rest parser)
 561   "R")
 562
 563 (define-display-method SkipEvent (rest parser)
 564   "s")
 565
 566 (define-display-method MarkEvent (mark parser)
 567   (let ((label (ly:music-property mark 'label)))
 568     (if (null? label)
 569         "\\mark \\default"
 570         (format #f "\\mark ~a" (markup->lily-string label)))))
 571
 572 (define-display-method KeyChangeEvent (key parser)
 573   (let ((pitch-alist (ly:music-property key 'pitch-alist))
 574         (tonic (ly:music-property key 'tonic)))
 575     (if (or (null? pitch-alist)
 576             (null? tonic))
 577         "\\key \\default"
 578         (let ((c-pitch-alist (ly:transpose-key-alist pitch-alist
 579                                                      (ly:pitch-diff (ly:make-pitch 0 0 0) tonic))))
 580           (format #f "\\key ~a \\~a~a"
 581                   (note-name->lily-string (ly:music-property key 'tonic) parser)
 582                   (any (lambda (mode)
 583                          (if (and parser
 584                                   (equal? (ly:parser-lookup parser mode) c-pitch-alist))
 585                              (symbol->string mode)
 586                              #f))
 587                        '(major minor ionian locrian aeolian mixolydian lydian phrygian dorian))
 588                   (new-line->lily-string))))))
 589
 590 (define-display-method RelativeOctaveCheck (octave parser)
 591   (let ((pitch (ly:music-property octave 'pitch)))
 592     (format #f "\\octaveCheck ~a~a"
 593             (note-name->lily-string pitch parser)
 594             (octave->lily-string pitch))))
 595
 596 (define-display-method VoiceSeparator (sep parser)
 597   "\\\\")
 598
 599 (define-display-method LigatureEvent (ligature parser)
 600   (if (= START (ly:music-property ligature 'span-direction))
 601       "\\["
 602       "\\]"))
 603
 604 (define-display-method BarCheck (check parser)
 605   (format #f "|~a" (new-line->lily-string)))
 606
 607 (define-display-method PesOrFlexaEvent (expr parser)
 608   "\\~")
 609
 610 (define-display-method BassFigureEvent (figure parser)
 611   (let ((alteration (ly:music-property figure 'alteration))
 612         (fig (ly:music-property figure 'figure))
 613         (bracket-start (ly:music-property figure 'bracket-start))
 614         (bracket-stop (ly:music-property figure 'bracket-stop)))
 615
 616     (format #f "~a~a~a~a"
 617             (if (null? bracket-start) "" "[")
 618             (cond ((null? fig) "_")
 619                   ((markup? fig) (second fig)) ;; fig: (<number-markup> "number")
 620                   (else fig))
 621             (if (null? alteration)
 622                 ""
 623                 (cond
 624                   ((= alteration DOUBLE-FLAT) "--")
 625                   ((= alteration FLAT) "-")
 626                   ((= alteration NATURAL) "!")
 627                   ((= alteration SHARP) "+")
 628                   ((= alteration DOUBLE-SHARP) "++")
 629                   (else "")))
 630             (if (null? bracket-stop) "" "]"))))
 631
 632 (define-display-method LyricEvent (lyric parser)
 633   (let ((text (ly:music-property lyric 'text)))
 634     (if (or (string? text)
 635             (eqv? (first text) simple-markup))
 636         ;; a string or a simple markup
 637         (let ((string (if (string? text)
 638                           text
 639                           (second text))))
 640           (if (string-match "(\"| |[0-9])" string)
 641               ;; TODO check exactly in which cases double quotes should be used
 642               (format #f "~s" string)
 643               string))
 644         (markup->lily-string text))))
 645
 646 (define-display-method BreathingEvent (event parser)
 647   "\\breathe")
 648
 649 ;;;
 650 ;;; Staff switches
 651 ;;;
 652
 653 (define-display-method AutoChangeMusic (m parser)
 654   (format #f "\\autochange ~a"
 655           (music->lily-string (ly:music-property m 'element) parser)))
 656
 657 (define-display-method ContextChange (m parser)
 658   (format #f "\\change ~a = \"~a\""
 659           (ly:music-property m 'change-to-type)
 660           (ly:music-property m 'change-to-id)))
 661
 662 ;;;
 663
 664 (define-display-method TimeScaledMusic (times parser)
 665   (let* ((num (ly:music-property times 'numerator))
 666          (den (ly:music-property times 'denominator))
 667          (nd-gcd (gcd num den)))
 668     (parameterize ((*force-line-break* #f)
 669                    (*time-factor-numerator* (/ num nd-gcd))
 670                    (*time-factor-denominator* (/ den nd-gcd)))
 671       (format #f "\\times ~a/~a ~a"
 672               num
 673               den
 674               (music->lily-string (ly:music-property times 'element) parser)))))
 675
 676 (define-display-method RelativeOctaveMusic (m parser)
 677   (music->lily-string (ly:music-property m 'element) parser))
 678
 679 (define-display-method TransposedMusic (m parser)
 680   (music->lily-string (ly:music-property m 'element) parser))
 681
 682 ;;;
 683 ;;; Repeats
 684 ;;;
 685
 686 (define (repeat->lily-string expr repeat-type parser)
 687   (format #f "\\repeat ~a ~a ~a ~a"
 688           repeat-type
 689           (ly:music-property expr 'repeat-count)
 690           (music->lily-string (ly:music-property expr 'element) parser)
 691           (let ((alternatives (ly:music-property expr 'elements)))
 692             (if (null? alternatives)
 693                 ""
 694                 (format #f "\\alternative { ~{~a ~}}"
 695                         (map-in-order (lambda (music)
 696                                         (music->lily-string music parser))
 697                                       alternatives))))))
 698
 699 (define-display-method VoltaRepeatedMusic (expr parser)
 700   (repeat->lily-string expr "volta" parser))
 701
 702 (define-display-method UnfoldedRepeatedMusic (expr parser)
 703   (repeat->lily-string expr "unfold" parser))
 704
 705 (define-display-method PercentRepeatedMusic (expr parser)
 706   (repeat->lily-string expr "percent" parser))
 707
 708 (define-display-method TremoloRepeatedMusic (expr parser)
 709   (let* ((count (ly:music-property expr 'repeat-count))
 710          (dots (if (= 0 (modulo count 3)) 0 1))
 711          (shift (- (log2 (if (= 0 dots)
 712                              (/ (* count 2) 3)
 713                              count))))
 714          (element (ly:music-property expr 'element))
 715          (den-mult 1))
 716     (if (eqv? (ly:music-property element 'name) 'SequentialMusic)
 717         (begin
 718           (set! shift (1- shift))
 719           (set! den-mult (length (ly:music-property element 'elements)))))
 720     (music-map (lambda (m)
 721                  (let ((duration (ly:music-property m 'duration)))
 722                    (if (ly:duration? duration)
 723                        (let* ((dlog (ly:duration-log duration))
 724                               (ddots (ly:duration-dot-count duration))
 725                               (dfactor (ly:duration-factor duration))
 726                               (dnum (car dfactor))
 727                               (dden (cdr dfactor)))
 728                          (set! (ly:music-property m 'duration)
 729                                (ly:make-duration (- dlog shift)
 730                                                  ddots ;;(- ddots dots) ; ????
 731                                                  dnum
 732                                                  (/ dden den-mult))))))
 733                  m)
 734                element)
 735     (format #f "\\repeat tremolo ~a ~a"
 736             count
 737             (music->lily-string element parser))))
 738
 739 ;;;
 740 ;;; Contexts
 741 ;;;
 742
 743 (define-display-method ContextSpeccedMusic (expr parser)
 744   (let ((id    (ly:music-property expr 'context-id))
 745         (create-new (ly:music-property expr 'create-new))
 746         (music (ly:music-property expr 'element))
 747         (operations (ly:music-property expr 'property-operations))
 748         (ctype (ly:music-property expr 'context-type)))
 749     (format #f "~a ~a~a~a ~a"
 750             (if (and (not (null? create-new)) create-new)
 751                 "\\new"
 752                 "\\context")
 753             ctype
 754             (if (null? id)
 755                 ""
 756                 (format #f " = ~s" id))
 757             (if (null? operations)
 758                 ""
 759                 (format #f " \\with {~{~a~}~%~v_}"
 760                         (parameterize ((*indent* (+ (*indent*) 2)))
 761                           (map (lambda (op)
 762                                  (format #f "~%~v_\\~a ~s"
 763                                          (*indent*)
 764                                          (first op)
 765                                          (second op)))
 766                                operations))
 767                         (*indent*)))
 768             (parameterize ((*current-context* ctype))
 769               (music->lily-string music parser)))))
 770
 771 ;; special cases: \figures \lyrics \drums
 772 (define-extra-display-method ContextSpeccedMusic (expr parser)
 773   (with-music-match (expr (music 'ContextSpeccedMusic
 774                                  create-new #t
 775                                  property-operations ?op
 776                                  context-type ?context-type
 777                                  element ?sequence))
 778     (if (null? ?op)
 779         (parameterize ((*explicit-mode* #f))
 780           (case ?context-type
 781             ((FiguredBass)
 782              (format #f "\\figures ~a" (music->lily-string ?sequence parser)))
 783             ((Lyrics)
 784              (format #f "\\lyrics ~a" (music->lily-string ?sequence parser)))
 785             ((DrumStaff)
 786              (format #f "\\drums ~a" (music->lily-string ?sequence parser)))
 787             (else
 788              #f)))
 789         #f)))
 790
 791 ;;; Context properties
 792
 793 (define-extra-display-method ContextSpeccedMusic (expr parser)
 794   (let ((element (ly:music-property expr 'element))
 795         (property-tuning? (make-music-type-predicate 'PropertySet
 796                                                      'PropertyUnset
 797                                                      'OverrideProperty
 798                                                      'RevertProperty))
 799         (sequence? (make-music-type-predicate 'SequentialMusic)))
 800     (if (and (ly:music? element)
 801              (or (property-tuning? element)
 802                  (and (sequence? element)
 803                       (every property-tuning? (ly:music-property element 'elements)))))
 804         (parameterize ((*current-context* (ly:music-property expr 'context-type)))
 805           (music->lily-string element parser))
 806         #f)))
 807
 808 (define (property-value->lily-string arg parser)
 809   (cond ((ly:music? arg)
 810          (music->lily-string arg parser))
 811         ((string? arg)
 812          (format #f "#~s" arg))
 813         ((markup? arg)
 814          (markup->lily-string arg))
 815         (else
 816          (format #f "#~a" (scheme-expr->lily-string arg)))))
 817
 818 (define-display-method PropertySet (expr parser)
 819   (let ((property (ly:music-property expr 'symbol))
 820         (value (ly:music-property expr 'value))
 821         (once (ly:music-property expr 'once)))
 822     (format #f "~a\\set ~a~a = ~a~a"
 823             (if (and (not (null? once)))
 824                 "\\once "
 825                 "")
 826             (if (eqv? (*current-context*) 'Bottom)
 827                 ""
 828                 (format #f "~a . " (*current-context*)))
 829             property
 830             (property-value->lily-string value parser)
 831             (new-line->lily-string))))
 832
 833 (define-display-method PropertyUnset (expr parser)
 834   (format #f "\\unset ~a~a~a"
 835           (if (eqv? (*current-context*) 'Bottom)
 836               ""
 837               (format #f "~a . " (*current-context*)))
 838           (ly:music-property expr 'symbol)
 839           (new-line->lily-string)))
 840
 841 ;;; Layout properties
 842
 843 (define-display-method OverrideProperty (expr parser)
 844   (let* ((symbol          (ly:music-property expr 'symbol))
 845          (property-path   (ly:music-property expr 'grob-property-path))
 846          (properties      (if (pair? property-path)
 847                               property-path
 848                               (list (ly:music-property expr 'grob-property))))
 849          (value   (ly:music-property expr 'grob-value))
 850          (once    (ly:music-property expr 'once)))
 851
 852     (format #f "~a\\override ~a~a #'~a = ~a~a"
 853             (if (or (null? once)
 854                     (not once))
 855                 ""
 856                 "\\once ")
 857             (if (eqv? (*current-context*) 'Bottom)
 858                 ""
 859                 (format #f "~a . " (*current-context*)))
 860             symbol
 861             (if (null? (cdr properties))
 862                 (car properties)
 863                 properties)
 864             (property-value->lily-string value parser)
 865             (new-line->lily-string))))
 866
 867 (define-display-method RevertProperty (expr parser)
 868   (let ((symbol (ly:music-property expr 'symbol))
 869         (properties (ly:music-property expr 'grob-property-path)))
 870     (format #f "\\revert ~a~a #'~a~a"
 871             (if (eqv? (*current-context*) 'Bottom)
 872                 ""
 873                 (format #f "~a . " (*current-context*)))
 874             symbol
 875             (if (null? (cdr properties))
 876                 (car properties)
 877                 properties)
 878             (new-line->lily-string))))
 879
 880 ;;; \melisma and \melismaEnd
 881 (define-extra-display-method ContextSpeccedMusic (expr parser)
 882   "If expr is a melisma, return \"\\melisma\", otherwise, return #f."
 883   (with-music-match (expr (music 'ContextSpeccedMusic
 884                                  element (music 'PropertySet
 885                                                 value #t
 886                                                 symbol 'melismaBusy)))
 887     "\\melisma"))
 888
 889 (define-extra-display-method ContextSpeccedMusic (expr parser)
 890   "If expr is a melisma end, return \"\\melismaEnd\", otherwise, return #f."
 891   (with-music-match (expr (music 'ContextSpeccedMusic
 892                                  element (music 'PropertyUnset
 893                                                 symbol 'melismaBusy)))
 894     "\\melismaEnd"))
 895
 896 ;;; \tempo
 897 ;;; Check for all three different syntaxes of tempo:
 898 ;;; \tempo string duration=note, \tempo duration=note and \tempo string
 899 (define-extra-display-method ContextSpeccedMusic (expr parser)
 900   "If expr is a tempo, return \"\\tempo x = nnn\", otherwise return #f."
 901   (or   (with-music-match (expr (music 'ContextSpeccedMusic
 902                 element (music 'SequentialMusic
 903                               elements ((music 'PropertySet
 904                                           value ?unit-text
 905                                           symbol 'tempoText)
 906                                         (music 'PropertySet
 907                                           symbol 'tempoWholesPerMinute)
 908                                         (music 'PropertySet
 909                                           value ?unit-duration
 910                                           symbol 'tempoUnitDuration)
 911                                         (music 'PropertySet
 912                                           value ?unit-count
 913                                           symbol 'tempoUnitCount)))))
 914                 (format #f "\\tempo ~a ~a = ~a"
 915                         (scheme-expr->lily-string ?unit-text)
 916                         (duration->lily-string ?unit-duration #:force-duration #t)
 917                         ?unit-count))
 918         (with-music-match (expr (music 'ContextSpeccedMusic
 919                     element (music 'SequentialMusic
 920                               elements ((music 'PropertyUnset
 921                                           symbol 'tempoText)
 922                                         (music 'PropertySet
 923                                           symbol 'tempoWholesPerMinute)
 924                                         (music 'PropertySet
 925                                           value ?unit-duration
 926                                           symbol 'tempoUnitDuration)
 927                                         (music 'PropertySet
 928                                           value ?unit-count
 929                                           symbol 'tempoUnitCount)))))
 930                         (format #f "\\tempo ~a = ~a"
 931                                 (duration->lily-string ?unit-duration #:force-duration #t)
 932                                 ?unit-count))
 933         (with-music-match (expr (music 'ContextSpeccedMusic
 934                             element (music 'SequentialMusic
 935                                       elements ((music 'PropertySet
 936                                                   value ?tempo-text
 937                                                  symbol 'tempoText)))))
 938                         (format #f "\\tempo ~a" (scheme-expr->lily-string ?tempo-text)))))
 939
 940 ;;; \clef
 941 (define clef-name-alist #f)
 942 (define-public (memoize-clef-names clefs)
 943   "Initialize `clef-name-alist', if not already set."
 944   (if (not clef-name-alist)
 945       (set! clef-name-alist
 946             (map (lambda (name+vals)
 947                    (cons (cdr name+vals)
 948                          (car name+vals)))
 949                  clefs))))
 950
 951 (define-extra-display-method ContextSpeccedMusic (expr parser)
 952   "If `expr' is a clef change, return \"\\clef ...\"
 953 Otherwise, return #f."
 954   (with-music-match (expr (music 'ContextSpeccedMusic
 955                                  context-type 'Staff
 956                                  element (music 'SequentialMusic
 957                                                 elements ((music 'PropertySet
 958                                                                  value ?clef-glyph
 959                                                                  symbol 'clefGlyph)
 960                                                           (music 'PropertySet
 961                                                                  symbol 'middleCClefPosition)
 962                                                           (music 'PropertySet
 963                                                                  value ?clef-position
 964                                                                  symbol 'clefPosition)
 965                                                           (music 'PropertySet
 966                                                                  value ?clef-octavation
 967                                                                  symbol 'clefOctavation)
 968                                                           (music 'ApplyContext
 969                                                                  procedure ly:set-middle-C!)))))
 970     (let ((clef-name (assoc-get (list ?clef-glyph ?clef-position 0)
 971                                  clef-name-alist)))
 972       (if clef-name
 973           (format #f "\\clef \"~a~{~a~a~}\"~a"
 974                   clef-name
 975                   (cond ((= 0 ?clef-octavation)
 976                          (list "" ""))
 977                         ((> ?clef-octavation 0)
 978                          (list "^" (1+ ?clef-octavation)))
 979                         (else
 980                          (list "_" (- 1 ?clef-octavation))))
 981                   (new-line->lily-string))
 982           #f))))
 983
 984 ;;; \time
 985 (define-extra-display-method ContextSpeccedMusic (expr parser)
 986   "If `expr' is a time signature set, return \"\\time ...\".
 987 Otherwise, return #f.  Note: default grouping is not available."
 988   (with-music-match
 989    (expr (music
 990            'ContextSpeccedMusic
 991            element (music
 992                     'ContextSpeccedMusic
 993                     context-type 'Timing
 994                     element (music
 995                              'SequentialMusic
 996                              elements ?elts))))
 997    (and
 998     (> (length ?elts) 2)
 999     (with-music-match ((cadr ?elts)
1000                        (music 'PropertySet
1001                               symbol 'beatLength))
1002        #t)
1003     (with-music-match ((caddr ?elts)
1004                        (music 'PropertySet
1005                               symbol 'measureLength))
1006        #t)
1007     (with-music-match ((car ?elts)
1008                        (music 'PropertySet
1009                               value ?num+den
1010                               symbol 'timeSignatureFraction))
1011        (if (eq? (length ?elts) 3)
1012            (format
1013              #f "\\time ~a/~a~a"
1014              (car ?num+den) (cdr ?num+den) (new-line->lily-string))
1015            (format
1016              #f "#(set-time-signature ~a ~a '(<grouping-specifier>))~a"
1017              (car ?num+den) (cdr ?num+den)  (new-line->lily-string)))))))
1018
1019 ;;; \bar
1020 (define-extra-display-method ContextSpeccedMusic (expr parser)
1021   "If `expr' is a bar, return \"\\bar ...\".
1022 Otherwise, return #f."
1023   (with-music-match (expr (music 'ContextSpeccedMusic
1024                                  context-type 'Timing
1025                                  element (music 'PropertySet
1026                                                 value ?bar-type
1027                                                 symbol 'whichBar)))
1028      (format #f "\\bar \"~a\"~a" ?bar-type (new-line->lily-string))))
1029
1030 ;;; \partial
1031 (define (duration->moment ly-duration)
1032   (let ((log2    (ly:duration-log ly-duration))
1033         (dots    (ly:duration-dot-count ly-duration))
1034         (num+den (ly:duration-factor ly-duration)))
1035     (let* ((m (expt 2 (- log2)))
1036            (factor (/ (car num+den) (cdr num+den))))
1037       (/ (do ((i 0 (1+ i))
1038               (delta (/ m 2) (/ delta 2)))
1039              ((= i dots) m)
1040            (set! m (+ m delta)))
1041          factor))))
1042
1043 (define moment-duration-alist (map (lambda (duration)
1044                                      (cons (duration->moment duration)
1045                                            duration))
1046                                    (append-map (lambda (log2)
1047                                                  (map (lambda (dots)
1048                                                         (ly:make-duration log2 dots 1 1))
1049                                                       (list 0 1 2 3)))
1050                                                (list 0 1 2 3 4))))
1051
1052 (define (moment->duration moment)
1053   (assoc-get (- moment) moment-duration-alist))
1054
1055 (define-extra-display-method ContextSpeccedMusic (expr parser)
1056   "If `expr' is a partial measure, return \"\\partial ...\".
1057 Otherwise, return #f."
1058   (with-music-match (expr (music
1059                            'ContextSpeccedMusic
1060                            element (music
1061                                     'ContextSpeccedMusic
1062                                     context-type 'Timing
1063                                     element (music
1064                                              'PropertySet
1065                                              value ?moment
1066                                              symbol 'measurePosition))))
1067      (let ((duration (moment->duration (/ (ly:moment-main-numerator ?moment)
1068                                           (ly:moment-main-denominator ?moment)))))
1069        (and duration (format #f "\\partial ~a" (duration->lily-string duration
1070                                                  #:force-duration #t))))))
1071
1072 ;;;
1073 ;;;
1074
1075 (define-display-method ApplyOutputEvent (applyoutput parser)
1076   (let ((proc (ly:music-property applyoutput 'procedure))
1077         (ctx  (ly:music-property applyoutput 'context-type)))
1078     (format #f "\\applyOutput #'~a #~a"
1079             ctx
1080             (or (procedure-name proc)
1081                 (with-output-to-string
1082                   (lambda ()
1083                     (pretty-print (procedure-source proc))))))))
1084
1085 (define-display-method ApplyContext (applycontext parser)
1086   (let ((proc (ly:music-property applycontext 'procedure)))
1087     (format #f "\\applyContext #~a"
1088             (or (procedure-name proc)
1089                 (with-output-to-string
1090                   (lambda ()
1091                     (pretty-print (procedure-source proc))))))))
1092
1093 ;;; \partcombine
1094 (define-display-method PartCombineMusic (expr parser)
1095   (format #f "\\partcombine ~{~a ~}"
1096           (map-in-order (lambda (music)
1097                           (music->lily-string music parser))
1098                         (ly:music-property expr 'elements))))
1099
1100 (define-extra-display-method PartCombineMusic (expr parser)
1101   (with-music-match (expr (music 'PartCombineMusic
1102                                  elements ((music 'UnrelativableMusic
1103                                                   element (music 'ContextSpeccedMusic
1104                                                                  context-id "one"
1105                                                                  context-type 'Voice
1106                                                                  element ?sequence1))
1107                                            (music 'UnrelativableMusic
1108                                                   element (music 'ContextSpeccedMusic
1109                                                                  context-id "two"
1110                                                                  context-type 'Voice
1111                                                                  element ?sequence2)))))
1112     (format #f "\\partcombine ~a~a~a"
1113             (music->lily-string ?sequence1 parser)
1114             (new-line->lily-string)
1115             (music->lily-string ?sequence2 parser))))
1116
1117 (define-display-method UnrelativableMusic (expr parser)
1118   (music->lily-string (ly:music-property expr 'element) parser))
1119
1120 ;;; Cue notes
1121 (define-display-method QuoteMusic (expr parser)
1122   (or (with-music-match (expr (music
1123                                'QuoteMusic
1124                                quoted-voice-direction ?quoted-voice-direction
1125                                quoted-music-name ?quoted-music-name
1126                                quoted-context-id "cue"
1127                                quoted-context-type 'Voice
1128                                element ?music))
1129         (format #f "\\cueDuring #~s #~a ~a"
1130                 ?quoted-music-name
1131                 ?quoted-voice-direction
1132                 (music->lily-string ?music parser)))
1133       (format #f "\\quoteDuring #~s ~a"
1134               (ly:music-property expr 'quoted-music-name)
1135               (music->lily-string (ly:music-property expr 'element) parser))))
1136
1137 ;;;
1138 ;;; Breaks
1139 ;;;
1140 (define-display-method LineBreakEvent (expr parser)
1141   (if (null? (ly:music-property expr 'break-permission))
1142       "\\noBreak"
1143       "\\break"))
1144
1145 (define-display-method PageBreakEvent (expr parser)
1146   (if (null? (ly:music-property expr 'break-permission))
1147       "\\noPageBreak"
1148       "\\pageBreak"))
1149
1150 (define-display-method PageTurnEvent (expr parser)
1151   (if (null? (ly:music-property expr 'break-permission))
1152       "\\noPageTurn"
1153       "\\pageTurn"))
1154
1155 (define-extra-display-method EventChord (expr parser)
1156   (with-music-match (expr (music 'EventChord
1157                             elements ((music 'LineBreakEvent
1158                                              break-permission 'force)
1159                                       (music 'PageBreakEvent
1160                                              break-permission 'force))))
1161     "\\pageBreak"))
1162
1163 (define-extra-display-method EventChord (expr parser)
1164   (with-music-match (expr (music 'EventChord
1165                             elements ((music 'LineBreakEvent
1166                                              break-permission 'force)
1167                                       (music 'PageBreakEvent
1168                                              break-permission 'force)
1169                                       (music 'PageTurnEvent
1170                                              break-permission 'force))))
1171     "\\pageTurn"))
1172
1173 ;;;
1174 ;;; Lyrics
1175 ;;;
1176
1177 ;;; \lyricsto
1178 (define-display-method LyricCombineMusic (expr parser)
1179   (format #f "\\lyricsto ~s ~a"
1180           (ly:music-property expr 'associated-context)
1181           (parameterize ((*explicit-mode* #f))
1182             (music->lily-string (ly:music-property expr 'element) parser))))
1183
1184 ;; \addlyrics
1185 (define-extra-display-method SimultaneousMusic (expr parser)
1186   (with-music-match (expr (music 'SimultaneousMusic
1187                                  elements ((music 'ContextSpeccedMusic
1188                                                   context-id ?id
1189                                                   context-type 'Voice
1190                                                   element ?note-sequence)
1191                                            (music 'ContextSpeccedMusic
1192                                                   context-type 'Lyrics
1193                                                   create-new #t
1194                                                   element (music 'LyricCombineMusic
1195                                                                  associated-context ?associated-id
1196                                                                  element ?lyric-sequence)))))
1197     (if (string=? ?id ?associated-id)
1198         (format #f "~a~a \\addlyrics ~a"
1199                 (music->lily-string ?note-sequence parser)
1200                 (new-line->lily-string)
1201                 (parameterize ((*explicit-mode* #f))
1202                   (music->lily-string ?lyric-sequence parser)))
1203         #f)))
1204
1205