ly/music-functions-init.ly

   1 % -*-Scheme-*-
   2
   3 \version "2.12.0"
   4
   5
   6 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   7 %% this file is alphabetically sorted.
   8 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   9
  10 %% need SRFI-1 filter
  11
  12 #(use-modules (srfi srfi-1))
  13
  14 acciaccatura =
  15 #(def-grace-function startAcciaccaturaMusic stopAcciaccaturaMusic
  16    (_i "Create an acciaccatura from the following music expression"))
  17
  18 addQuote =
  19 #(define-music-function (parser location name music) (string? ly:music?)
  20    (_i "Define @var{music} as a quotable music expression named
  21 @var{name}")
  22    (add-quotable parser name music)
  23    (make-music 'SequentialMusic 'void #t))
  24
  25 afterGraceFraction =
  26 #(cons 6 8)
  27
  28 afterGrace =
  29 #(define-music-function
  30   (parser location main grace)
  31   (ly:music? ly:music?)
  32   (_i "Create @var{grace} note(s) after a @var{main} music expression.")
  33   (let*
  34       ((main-length (ly:music-length main))
  35        (fraction  (ly:parser-lookup parser 'afterGraceFraction)))
  36
  37     (make-simultaneous-music
  38      (list
  39       main
  40       (make-sequential-music
  41        (list
  42
  43         (make-music 'SkipMusic
  44                     'duration (ly:make-duration
  45                                0 0
  46                                (* (ly:moment-main-numerator main-length)
  47                                   (car fraction))
  48                                (* (ly:moment-main-denominator main-length)
  49                                   (cdr fraction)) ))
  50         (make-music 'GraceMusic
  51                     'element grace)))))))
  52
  53 applyMusic =
  54 #(define-music-function (parser location func music) (procedure? ly:music?)
  55    (_i"Apply procedure @var{func} to @var{music}.")
  56   (func music))
  57
  58
  59 applyOutput =
  60 #(define-music-function (parser location ctx proc) (symbol? procedure?)
  61   (_i "Apply function @code{proc} to every layout object in context @code{ctx}")
  62   (make-music 'ApplyOutputEvent
  63               'origin location
  64               'procedure proc
  65               'context-type ctx))
  66
  67 appoggiatura =
  68 #(def-grace-function startAppoggiaturaMusic stopAppoggiaturaMusic
  69   (_i "Create an appoggiatura from @var{music}"))
  70
  71
  72 % for regression testing purposes.
  73 assertBeamQuant =
  74 #(define-music-function (parser location l r) (pair? pair?)
  75   (_i "Testing function: check whether the beam quants @var{l} and @var{r} are correct")
  76   (make-grob-property-override 'Beam 'positions
  77    (ly:make-simple-closure
  78     (ly:make-simple-closure
  79      (append
  80       (list chain-grob-member-functions `(,cons 0 0))
  81       (check-quant-callbacks l r))))))
  82
  83 % for regression testing purposes.
  84 assertBeamSlope =
  85 #(define-music-function (parser location comp) (procedure?)
  86   (_i "Testing function: check whether the slope of the beam is the same as @code{comp}")
  87   (make-grob-property-override 'Beam 'positions
  88    (ly:make-simple-closure
  89     (ly:make-simple-closure
  90      (append
  91       (list chain-grob-member-functions `(,cons 0 0))
  92       (check-slope-callbacks comp))))))
  93
  94
  95
  96 autochange =
  97 #(define-music-function (parser location music) (ly:music?)
  98   (_i "Make voices that switch between staves automatically")
  99   (make-autochange-music parser music))
 100
 101 applyContext =
 102 #(define-music-function (parser location proc) (procedure?)
 103   (_i "Modify context properties with Scheme procedure @var{proc}.")
 104   (make-music 'ApplyContext
 105               'origin location
 106               'procedure proc))
 107
 108
 109 balloonGrobText =
 110 #(define-music-function (parser location grob-name offset text)
 111                         (symbol? number-pair? markup?)
 112   (_i "Attach @var{text} to @var{grob-name} at offset @var{offset}
 113 (use like @code{\\once})")
 114     (make-music 'AnnotateOutputEvent
 115                 'symbol grob-name
 116                 'X-offset (car offset)
 117                 'Y-offset (cdr offset)
 118                 'text text))
 119
 120 balloonText =
 121 #(define-music-function (parser location offset text) (number-pair? markup?)
 122   (_i "Attach @var{text} at @var{offset} (use like @code{\\tweak})")
 123     (make-music 'AnnotateOutputEvent
 124                 'X-offset (car offset)
 125                 'Y-offset (cdr offset)
 126                 'text text))
 127
 128
 129 bar =
 130 #(define-music-function (parser location type) (string?)
 131   (_i "Insert a bar line of type @var{type}")
 132    (context-spec-music
 133     (make-property-set 'whichBar type)
 134     'Timing))
 135
 136
 137 barNumberCheck =
 138 #(define-music-function (parser location n) (integer?)
 139   (_i "Print a warning if the current bar number is not @var{n}.")
 140    (make-music 'ApplyContext
 141                'origin location
 142                'procedure
 143                (lambda (c)
 144                  (let*
 145                      ((cbn (ly:context-property c 'currentBarNumber)))
 146                    (if (and  (number? cbn) (not (= cbn n)))
 147                        (ly:input-message location "Barcheck failed got ~a expect ~a"
 148                                          cbn n))))))
 149
 150
 151 bendAfter =
 152 #(define-music-function (parser location delta) (real?)
 153   (_i "Create a fall or doit of pitch interval @var{delta}.")
 154   (make-music 'BendAfterEvent
 155    'delta-step delta))
 156
 157 %% why a function?
 158 breathe =
 159 #(define-music-function (parser location) ()
 160   (_i "Insert a breath mark.")
 161             (make-music 'EventChord
 162               'origin location
 163               'elements (list (make-music 'BreathingEvent))))
 164
 165
 166 clef =
 167 #(define-music-function (parser location type) (string?)
 168   (_i "Set the current clef to @var{type}.")
 169    (make-clef-set type))
 170
 171
 172 cueDuring =
 173 #(define-music-function
 174   (parser location what dir main-music) (string? ly:dir? ly:music?)
 175   (_i "Insert contents of quote @var{what} corresponding to @var{main-music},
 176 in a CueVoice oriented by @var{dir}.")
 177   (make-music 'QuoteMusic
 178               'element main-music
 179               'quoted-context-type 'Voice
 180               'quoted-context-id "cue"
 181               'quoted-music-name what
 182               'quoted-voice-direction dir
 183               'origin location))
 184
 185 displayLilyMusic =
 186 #(define-music-function (parser location music) (ly:music?)
 187   (_i "Display  the LilyPond input representation of @var{music}
 188 to the console.")
 189    (newline)
 190    (display-lily-music music parser)
 191    music)
 192
 193 displayMusic =
 194 #(define-music-function (parser location music) (ly:music?)
 195   (_i "Display the internal representation of @var{music} to the console.")
 196    (newline)
 197    (display-scheme-music music)
 198    music)
 199
 200
 201 endSpanners =
 202 #(define-music-function (parser location music) (ly:music?)
 203   (_i "Terminate the next spanner prematurely after exactly one note without the need of a specific end spanner.")
 204    (if (eq? (ly:music-property music 'name) 'EventChord)
 205        (let*
 206            ((elts (ly:music-property music 'elements))
 207             (start-span-evs (filter (lambda (ev)
 208                                 (and (music-has-type ev 'span-event)
 209                                      (equal? (ly:music-property ev 'span-direction)
 210                                              START)))
 211                               elts))
 212             (stop-span-evs
 213              (map (lambda (m)
 214                     (let* ((c (music-clone m)))
 215                       (set! (ly:music-property c 'span-direction) STOP)
 216                       c))
 217                   start-span-evs))
 218             (end-ev-chord (make-music 'EventChord
 219                                       'elements stop-span-evs))
 220             (total (make-music 'SequentialMusic
 221                                'elements (list music
 222                                                end-ev-chord))))
 223          total)
 224
 225        (ly:input-message location (_ "argument endSpanners is not an EventChord: ~a" music))))
 226
 227 featherDurations=
 228 #(define-music-function (parser location factor argument) (ly:moment? ly:music?)
 229  (_i "Adjust durations of music in @var{argument} by rational @var{factor}. ")
 230    (let*
 231        ((orig-duration (ly:music-length argument))
 232         (multiplier (ly:make-moment 1 1)))
 233
 234      (music-map
 235       (lambda (mus)
 236         (if (and (eq? (ly:music-property mus 'name) 'EventChord)
 237                  (< 0 (ly:moment-main-denominator (ly:music-length mus))))
 238             (begin
 239               (ly:music-compress mus multiplier)
 240               (set! multiplier (ly:moment-mul factor multiplier)))
 241             )
 242         mus)
 243       argument)
 244
 245      (ly:music-compress
 246       argument
 247       (ly:moment-div orig-duration (ly:music-length argument)))
 248
 249      argument))
 250
 251 grace =
 252 #(def-grace-function startGraceMusic stopGraceMusic
 253    (_i "Insert @var{music} as grace notes."))
 254
 255 "instrument-definitions" = #'()
 256
 257 addInstrumentDefinition =
 258 #(define-music-function
 259    (parser location name lst) (string? list?)
 260    (_i "Create instrument @var{name} with properties @var{list}.")
 261    (set! instrument-definitions (acons name lst instrument-definitions))
 262
 263    (make-music 'SequentialMusic 'void #t))
 264
 265
 266 instrumentSwitch =
 267 #(define-music-function
 268    (parser location name) (string?)
 269    (_i "Switch instrument to @var{name}, which must be predefined with
 270 @var{\addInstrumentDefinition}.")
 271    (let*
 272        ((handle  (assoc name instrument-definitions))
 273         (instrument-def (if handle (cdr handle) '()))
 274         )
 275
 276      (if (not handle)
 277          (ly:input-message "No such instrument: ~a" name))
 278      (context-spec-music
 279       (make-music 'SimultaneousMusic
 280                   'elements
 281                   (map (lambda (kv)
 282                          (make-property-set
 283                           (car kv)
 284                           (cdr kv)))
 285                        instrument-def))
 286       'Staff)))
 287
 288
 289 %% Parser used to read page-layout file, and then retreive score tweaks.
 290 #(define page-layout-parser #f)
 291
 292 includePageLayoutFile =
 293 #(define-music-function (parser location) ()
 294    (_i "Include the file @var{<basename>-page-layout.ly}. Deprecated as
 295 part of two-pass spacing.")
 296    (if (not (ly:get-option 'dump-tweaks))
 297        (let ((tweak-filename (format #f "~a-page-layout.ly"
 298                                      (ly:parser-output-name parser))))
 299          (if (access? tweak-filename R_OK)
 300              (begin
 301                (ly:message "Including tweak file ~a" tweak-filename)
 302                (set! page-layout-parser (ly:parser-clone parser))
 303                (ly:parser-parse-string page-layout-parser
 304                                        (format #f "\\include \"~a\""
 305                                                tweak-filename))))))
 306    (make-music 'SequentialMusic 'void #t))
 307
 308 keepWithTag =
 309 #(define-music-function
 310   (parser location tag music) (symbol? ly:music?)
 311   (_i "Include only elements of @var{music} that are tagged with @var{tag}.")
 312   (music-filter
 313    (lambda (m)
 314     (let* ((tags (ly:music-property m 'tags))
 315            (res (memq tag tags)))
 316      (or
 317       (eq? tags '())
 318       res)))
 319    music))
 320
 321 removeWithTag =
 322 #(define-music-function
 323   (parser location tag music) (symbol? ly:music?)
 324   (_i "Remove elements of @var{music} that are tagged with @var{tag}.")
 325   (music-filter
 326    (lambda (m)
 327     (let* ((tags (ly:music-property m 'tags))
 328            (res (memq tag tags)))
 329      (not res)))
 330  music))
 331
 332 killCues =
 333 #(define-music-function
 334    (parser location music)
 335    (ly:music?)
 336    (_i "Remove cue notes from @var{music}.")
 337    (music-map
 338     (lambda (mus)
 339       (if (string? (ly:music-property mus 'quoted-music-name))
 340           (ly:music-property mus 'element)
 341           mus)) music))
 342
 343 label =
 344 #(define-music-function (parser location label) (symbol?)
 345    (_i "Create @var{label} as a bookmarking label")
 346    (make-music 'EventChord
 347                'page-marker #t
 348                'page-label label
 349                'elements (list (make-music 'LabelEvent
 350                                            'page-label label))))
 351
 352 makeClusters =
 353 #(define-music-function
 354                 (parser location arg) (ly:music?)
 355    (_i "Display chords in @var{arg} as clusters")
 356                 (music-map note-to-cluster arg))
 357
 358 musicMap =
 359 #(define-music-function (parser location proc mus) (procedure? ly:music?)
 360              (music-map proc mus))
 361
 362
 363 overrideProperty =
 364 #(define-music-function (parser location name property value)
 365    (string? symbol? scheme?)
 366
 367    (_i "Set @var{property} to @var{value} in all grobs named @var{name}.
 368 The @var{name} argument is a string of the form @code{\"Context.GrobName\"}
 369 or @code{\"GrobName\"}")
 370
 371    (let*
 372        ((name-components (string-split name #\.))
 373         (context-name 'Bottom)
 374         (grob-name #f))
 375
 376      (if (> 2 (length name-components))
 377          (set! grob-name (string->symbol (car name-components)))
 378          (begin
 379            (set! grob-name (string->symbol (list-ref name-components 1)))
 380            (set! context-name (string->symbol (list-ref name-components 0)))))
 381
 382      (make-music 'ApplyOutputEvent
 383                  'origin location
 384                  'context-type context-name
 385                  'procedure
 386                  (lambda (grob orig-context context)
 387                    (if (equal?
 388                         (cdr (assoc 'name (ly:grob-property grob 'meta)))
 389                         grob-name)
 390                        (set! (ly:grob-property grob property) value))))))
 391
 392 %% These are music functions (iso music indentifiers), because music identifiers
 393 %% are not allowed at top-level.
 394 pageBreak =
 395 #(define-music-function (location parser) ()
 396    (_i "Force a page break. May be used at toplevel (ie between scores or
 397 markups), or inside a score.")
 398    (make-music 'EventChord
 399                'page-marker #t
 400                'line-break-permission 'force
 401                'page-break-permission 'force
 402                'elements (list (make-music 'LineBreakEvent
 403                                            'break-permission 'force)
 404                                (make-music 'PageBreakEvent
 405                                            'break-permission 'force))))
 406
 407 noPageBreak =
 408 #(define-music-function (location parser) ()
 409    (_i "Forbid a page break. May be used at toplevel (ie between scores or
 410 markups), or inside a score.")
 411    (make-music 'EventChord
 412                'page-marker #t
 413                'page-break-permission 'forbid
 414                'elements (list (make-music 'PageBreakEvent
 415                                            'break-permission '()))))
 416
 417 pageTurn =
 418 #(define-music-function (location parser) ()
 419    (_i "Force a page turn between two scores or top-level markups.")
 420    (make-music 'EventChord
 421                'page-marker #t
 422                'line-break-permission 'force
 423                'page-break-permission 'force
 424                'page-turn-permission 'force
 425                'elements (list (make-music 'LineBreakEvent
 426                                            'break-permission 'force)
 427                                (make-music 'PageBreakEvent
 428                                            'break-permission 'force)
 429                                (make-music 'PageTurnEvent
 430                                            'break-permission 'force))))
 431
 432 noPageTurn =
 433 #(define-music-function (location parser) ()
 434    (_i "Forbid a page turn. May be used at toplevel (ie between scores or
 435 markups), or inside a score.")
 436    (make-music 'EventChord
 437                'page-marker #t
 438                'page-turn-permission 'forbid
 439                'elements (list (make-music 'PageTurnEvent
 440                                            'break-permission '()))))
 441
 442 allowPageTurn =
 443 #(define-music-function (location parser) ()
 444    (_i "Allow a page turn. May be used at toplevel (ie between scores or
 445 markups), or inside a score.")
 446    (make-music 'EventChord
 447                'page-marker #t
 448                'page-turn-permission 'allow
 449                'elements (list (make-music 'PageTurnEvent
 450                                            'break-permission 'allow))))
 451
 452 %% Todo:
 453 %% doing
 454 %% define-music-function in a .scm causes crash.
 455
 456 octaveCheck =
 457 #(define-music-function (parser location pitch-note) (ly:music?)
 458    (_i "octave check")
 459
 460    (make-music 'RelativeOctaveCheck
 461                'origin location
 462                'pitch (pitch-of-note pitch-note)
 463            ))
 464
 465 ottava = #(define-music-function (parser location octave) (number?)
 466   (_i "set the octavation ")
 467   (make-ottava-set octave))
 468
 469 partcombine =
 470 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
 471                 (make-part-combine-music parser
 472                                          (list part1 part2)))
 473
 474
 475 pitchedTrill =
 476 #(define-music-function
 477    (parser location main-note secondary-note)
 478    (ly:music? ly:music?)
 479    (let*
 480        ((get-notes (lambda (ev-chord)
 481                      (filter
 482                       (lambda (m) (eq? 'NoteEvent (ly:music-property m 'name)))
 483                       (ly:music-property ev-chord 'elements))))
 484         (sec-note-events (get-notes secondary-note))
 485         (trill-events (filter (lambda (m) (music-has-type m 'trill-span-event))
 486                               (ly:music-property main-note 'elements))))
 487
 488      (if (pair? sec-note-events)
 489          (begin
 490            (let*
 491                ((trill-pitch (ly:music-property (car sec-note-events) 'pitch))
 492                 (forced (ly:music-property (car sec-note-events ) 'force-accidental)))
 493
 494              (if (ly:pitch? trill-pitch)
 495                  (for-each (lambda (m) (ly:music-set-property! m 'pitch trill-pitch))
 496                            trill-events)
 497                  (begin
 498                    (ly:warning (_ "Second argument of \\pitchedTrill should be single note: "))
 499                    (display sec-note-events)))
 500
 501              (if (eq? forced #t)
 502                  (for-each (lambda (m) (ly:music-set-property! m 'force-accidental forced))
 503                            trill-events)))))
 504      main-note))
 505
 506
 507
 508 %% for lambda*
 509 #(use-modules (ice-9 optargs))
 510
 511 parallelMusic =
 512 #(define-music-function (parser location voice-ids music) (list? ly:music?)
 513   (_i "Define parallel music sequences, separated by '|' (bar check signs),
 514 and assign them to the identifiers provided in @var{voice-ids}.
 515
 516 @var{voice-ids}: a list of music identifiers (symbols containing only letters)
 517
 518 @var{music}: a music sequence, containing BarChecks as limiting expressions.
 519
 520 Example:
 521
 522 @verbatim
 523   \\parallelMusic #'(A B C) {
 524     c c | d d | e e |
 525     d d | e e | f f |
 526   }
 527 <==>
 528   A = { c c | d d | }
 529   B = { d d | e e | }
 530   C = { e e | f f | }
 531 @end verbatim
 532 ")
 533   (let* ((voices (apply circular-list (make-list (length voice-ids) (list))))
 534          (current-voices voices)
 535          (current-sequence (list)))
 536     ;;
 537     ;; utilities
 538     (define (push-music m)
 539       "Push the music expression into the current sequence"
 540       (set! current-sequence (cons m current-sequence)))
 541     (define (change-voice)
 542       "Stores the previously built sequence into the current voice and
 543        change to the following voice."
 544       (list-set! current-voices 0 (cons (make-music 'SequentialMusic
 545                                          'elements (reverse! current-sequence))
 546                                         (car current-voices)))
 547       (set! current-sequence (list))
 548       (set! current-voices (cdr current-voices)))
 549     (define (bar-check? m)
 550       "Checks whether m is a bar check."
 551       (eq? (ly:music-property m 'name) 'BarCheck))
 552     (define (music-origin music)
 553       "Recursively search an origin location stored in music."
 554       (cond ((null? music) #f)
 555             ((not (null? (ly:music-property music 'origin)))
 556              (ly:music-property music 'origin))
 557             (else (or (music-origin (ly:music-property music 'element))
 558                       (let ((origins (remove not (map music-origin
 559                                                       (ly:music-property music 'elements)))))
 560                         (and (not (null? origins)) (car origins)))))))
 561     ;;
 562     ;; first, split the music and fill in voices
 563     (map-in-order (lambda (m)
 564                     (push-music m)
 565                     (if (bar-check? m) (change-voice)))
 566                   (ly:music-property music 'elements))
 567     (if (not (null? current-sequence)) (change-voice))
 568     ;; un-circularize `voices' and reorder the voices
 569     (set! voices (map-in-order (lambda (dummy seqs)
 570                                  (reverse! seqs))
 571                                voice-ids voices))
 572     ;;
 573     ;; set origin location of each sequence in each voice
 574     ;; for better type error tracking
 575     (for-each (lambda (voice)
 576                 (for-each (lambda (seq)
 577                             (set! (ly:music-property seq 'origin)
 578                                   (or (music-origin seq) location)))
 579                           voice))
 580               voices)
 581     ;;
 582     ;; check sequence length
 583     (apply for-each (lambda* (#:rest seqs)
 584                       (let ((moment-reference (ly:music-length (car seqs))))
 585                         (for-each (lambda (seq moment)
 586                                     (if (not (equal? moment moment-reference))
 587                                         (ly:music-message seq
 588                                          "Bars in parallel music don't have the same length")))
 589                           seqs (map-in-order ly:music-length seqs))))
 590            voices)
 591    ;;
 592    ;; bind voice identifiers to the voices
 593    (map (lambda (voice-id voice)
 594           (ly:parser-define! parser voice-id
 595                              (make-music 'SequentialMusic
 596                                'origin location
 597                                'elements voice)))
 598         voice-ids voices))
 599  ;; Return an empty sequence. this function is actually a "void" function.
 600  (make-music 'SequentialMusic 'void #t))
 601
 602
 603
 604 parenthesize =
 605 #(define-music-function (parser loc arg) (ly:music?)
 606    (_i "Tag @var{arg} to be parenthesized.")
 607
 608    (if (memq 'event-chord (ly:music-property arg 'types))
 609      ; arg is an EventChord -> set the parenthesize property on all child notes and rests
 610      (map
 611        (lambda (ev)
 612          (if (or (memq 'note-event (ly:music-property ev 'types))
 613                  (memq 'rest-event (ly:music-property ev 'types)))
 614            (set! (ly:music-property ev 'parenthesize) #t)))
 615        (ly:music-property arg 'elements))
 616      ; No chord, simply set property for this expression:
 617      (set! (ly:music-property arg 'parenthesize) #t))
 618    arg)
 619
 620
 621 quoteDuring = #
 622 (define-music-function
 623   (parser location what main-music)
 624   (string? ly:music?)
 625   (make-music 'QuoteMusic
 626               'element main-music
 627               'quoted-music-name what
 628               'origin location))
 629
 630
 631
 632 resetRelativeOctave  =
 633 #(define-music-function
 634     (parser location reference-note)
 635     (ly:music?)
 636     (_i "Set the octave inside a \\relative section.")
 637
 638    (let*
 639     ((notes (ly:music-property reference-note 'elements))
 640      (pitch (ly:music-property (car notes) 'pitch)))
 641
 642     (set! (ly:music-property reference-note 'elements) '())
 643     (set! (ly:music-property reference-note
 644        'to-relative-callback)
 645        (lambda (music last-pitch)
 646         pitch))
 647
 648     reference-note))
 649
 650
 651 scaleDurations =
 652 #(define-music-function (parser location fraction music) (number-pair? ly:music?)
 653    (_i "Multiply the duration of events in @var{music} by @var{fraction}.")
 654    (ly:music-compress music
 655                       (ly:make-moment (car fraction) (cdr fraction))))
 656
 657
 658
 659 shiftDurations =
 660 #(define-music-function (parser location dur dots arg) (integer? integer? ly:music?)
 661    (_i "Scale @var{arg} up by a factor of @var{2^dur*(2-(1/2)^dots)}.")
 662
 663    (music-map
 664     (lambda (x)
 665       (shift-one-duration-log x dur dots)) arg))
 666
 667 spacingTweaks =
 668 #(define-music-function (parser location parameters) (list?)
 669    (_i "Set the system stretch, by reading the 'system-stretch property of
 670 the `parameters' assoc list.")
 671    #{
 672       \overrideProperty #"Score.NonMusicalPaperColumn"
 673         #'line-break-system-details
 674         #$(list (cons 'alignment-extra-space (cdr (assoc 'system-stretch parameters)))
 675                 (cons 'system-Y-extent (cdr (assoc 'system-Y-extent parameters))))
 676    #})
 677
 678
 679 rightHandFinger =
 680 #(define-music-function (parser location finger) (number-or-string?)
 681    (_i "Apply @var{finger} as a fingering indication.")
 682
 683    (apply make-music
 684           (append
 685            (list
 686             'StrokeFingerEvent
 687             'origin location)
 688            (if  (string? finger)
 689                 (list 'text finger)
 690                 (list 'digit finger)))))
 691
 692 scoreTweak =
 693 #(define-music-function (parser location name) (string?)
 694    (_i "Include the score tweak, if exists.")
 695    (if (and page-layout-parser (not (ly:get-option 'dump-tweaks)))
 696        (let ((tweak-music (ly:parser-lookup page-layout-parser
 697                                             (string->symbol name))))
 698          (if (ly:music? tweak-music)
 699              tweak-music
 700              (make-music 'SequentialMusic)))
 701        (make-music 'SequentialMusic)))
 702
 703
 704 tag =
 705 #(define-music-function (parser location tag arg)
 706    (symbol? ly:music?)
 707
 708    (_i "Add @var{tag} to the @code{tags} property of @var{arg}.")
 709
 710    (set!
 711     (ly:music-property arg 'tags)
 712     (cons tag
 713           (ly:music-property arg 'tags)))
 714    arg)
 715
 716
 717
 718 transposedCueDuring =
 719 #(define-music-function
 720   (parser location what dir pitch-note main-music)
 721   (string? ly:dir? ly:music? ly:music?)
 722
 723   (_i "Insert notes from the part @var{what} into a voice called @code{cue},
 724 using the transposition defined by @var{pitch-note}.  This happens
 725 simultaneously with @var{main-music}, which is usually a rest.  The
 726 argument @var{dir} determines whether the cue notes should be notated
 727 as a first or second voice.")
 728
 729   (make-music 'QuoteMusic
 730               'element main-music
 731               'quoted-context-type 'Voice
 732               'quoted-context-id "cue"
 733               'quoted-music-name what
 734               'quoted-voice-direction dir
 735               'quoted-transposition (pitch-of-note pitch-note)
 736               'origin location))
 737
 738
 739
 740 transposition =
 741 #(define-music-function (parser location pitch-note) (ly:music?)
 742    (_i "Set instrument transposition")
 743
 744    (context-spec-music
 745     (make-property-set 'instrumentTransposition
 746                        (ly:pitch-negate (pitch-of-note pitch-note)))
 747         'Staff))
 748
 749 tweak =
 750 #(define-music-function (parser location sym val arg)
 751    (symbol? scheme? ly:music?)
 752    (_i "Add @code{sym . val} to the @code{tweaks} property of @var{arg}.")
 753
 754    (if (equal? (object-property sym 'backend-type?) #f)
 755        (begin
 756          (ly:warning (_ "cannot find property type-check for ~a") sym)
 757          (ly:warning (_ "doing assignment anyway"))))
 758    (set!
 759     (ly:music-property arg 'tweaks)
 760     (acons sym val
 761            (ly:music-property arg 'tweaks)))
 762    arg)
 763
 764
 765
 766 unfoldRepeats =
 767 #(define-music-function (parser location music) (ly:music?)
 768                   (unfold-repeats music))
 769
 770
 771
 772 withMusicProperty =
 773 #(define-music-function (parser location sym val music) (symbol? scheme? ly:music?)
 774    (_i "Set @var{sym} to @var{val} in @var{music}.")
 775
 776    (set! (ly:music-property music sym) val)
 777    music)