1 ;;;; output-lib.scm -- implement Scheme output helper functions
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
11 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
13 (define-public (grob::has-interface grob iface)
14 (memq iface (ly:grob-interfaces grob)))
16 (define-public (make-stencil-boxer thickness padding callback)
18 "Return function that adds a box around the grob passed as argument."
21 (box-stencil (callback grob) thickness padding)))
23 (define-public (make-stencil-circler thickness padding callback)
24 "Return function that adds a circle around the grob passed as argument."
26 (lambda (grob) (circle-stencil (callback grob) thickness padding)))
28 (define-public (print-circled-text-callback grob)
29 (grob-interpret-markup grob (make-circle-markup
30 (ly:grob-property grob 'text))
33 (define-public (event-cause grob)
35 ((cause (ly:grob-property grob 'cause)))
38 ((ly:stream-event? cause) cause)
39 ((ly:grob? cause) (event-cause cause))
42 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
45 ;; The TabNoteHead tablatureFormat callback.
46 ;; Compute the text grob-property
47 (define-public (fret-number-tablature-format string
50 ((tuning (ly:context-property context 'stringTunings))
51 (pitch (ly:event-property event 'pitch))
56 (eq? 'harmonic-event (ly:event-property ev 'class)))
57 (ly:event-property event 'articulations)))))
64 (- (ly:pitch-semitones pitch)
66 ;; remove 1 because list index starts at 0 and guitar string at 1.
70 ;; The 5-string banjo has got a extra string, the fifth (duh), wich
71 ;; starts at the fifth fret on the neck. Frets on the fifth string
72 ;; are referred to relative to the other frets:
73 ;; the "first fret" on the fifth string is really the sixth fret
75 ;; We solve this by defining a new fret-number-tablature function:
76 (define-public (fret-number-tablature-format-banjo string
79 ((tuning (ly:context-property context 'stringTunings))
80 (pitch (ly:event-property event 'pitch))
84 (let ((fret (- (ly:pitch-semitones pitch) (list-ref tuning (- string 1)))))
86 ((and (> fret 0) (= string 5))
92 ; default tunings for common string instruments
93 (define-public guitar-tuning '(4 -1 -5 -10 -15 -20))
94 (define-public guitar-open-g-tuning '(2 -1 -5 -10 -17 -22))
95 (define-public bass-tuning '(-17 -22 -27 -32))
96 (define-public mandolin-tuning '(16 9 2 -5))
98 ;; tunings for 5-string banjo
99 (define-public banjo-open-g-tuning '(2 -1 -5 -10 7))
100 (define-public banjo-c-tuning '(2 -1 -5 -12 7))
101 (define-public banjo-modal-tuning '(2 0 -5 -10 7))
102 (define-public banjo-open-d-tuning '(2 -3 -6 -10 9))
103 (define-public banjo-open-dm-tuning '(2 -3 -6 -10 9))
104 ;; convert 5-string banjo tuning to 4-string by removing the 5th string
105 (define-public (four-string-banjo tuning)
106 (reverse (cdr (reverse tuning))))
108 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
112 (define-public (stem::calc-duration-log grob)
114 (ly:event-property (event-cause grob) 'duration)))
116 (define-public (note-head::calc-duration-log grob)
119 (ly:event-property (event-cause grob) 'duration))))
121 (define-public (dots::calc-dot-count grob)
122 (ly:duration-dot-count
123 (ly:event-property (event-cause grob) 'duration)))
125 (define-public (dots::calc-staff-position grob)
127 ((head (ly:grob-parent grob Y))
128 (log (ly:grob-property head 'duration-log)))
131 ((or (not (grob::has-interface head 'rest-interface))
132 (not (integer? log))) 0)
140 (define (note-head::calc-tablature-stem-attachment grob)
146 (define-public (note-head::calc-glyph-name grob)
148 ((style (ly:grob-property grob 'style))
149 (log (min 2 (ly:grob-property grob 'duration-log))))
152 ;; "default" style is directly handled in note-head.cc as a
153 ;; special case (HW says, mainly for performance reasons).
154 ;; Therefore, style "default" does not appear in this case
156 ((xcircle) "2xcircle")
157 ((harmonic) "0harmonic")
158 ((harmonic-black) "2harmonic")
159 ((harmonic-mixed) (if (<= log 1) "0harmonic"
162 ;; Oops, I actually would not call this "baroque", but, for
163 ;; backwards compatibility to 1.4, this is supposed to take
164 ;; brevis, longa and maxima from the neo-mensural font and all
165 ;; other note heads from the default font. -- jr
167 (string-append (number->string log) "neomensural")
168 (number->string log)))
170 (string-append (number->string log) (symbol->string style)))
173 (string-append (number->string log) "mensural")
174 (string-append (number->string log) (symbol->string style))))
176 (string-append (number->string log) (symbol->string style)))
178 (if (string-match "vaticana*|hufnagel*|medicaea*" (symbol->string style))
179 (symbol->string style)
180 (string-append (number->string (max 0 log))
181 (symbol->string style)))))))
183 ;; TODO junk completely?
184 (define (note-head-style->attachment-coordinates grob axis)
185 "Return pair (X . Y), containing multipliers for the note head
186 bounding box, where to attach the stem. e.g.: X==0 means horizontally
187 centered, X==1 is at the right, X == -1 is at the left."
192 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
195 (define-public ((every-nth-bar-number-visible n) barnum) (= 0 (modulo barnum n)))
197 (define-public ((modulo-bar-number-visible n m) barnum) (and (> barnum 1) (= m (modulo barnum n))))
199 (define-public ((set-bar-number-visibility n) tr)
200 (let* ((bn (ly:context-property tr 'currentBarNumber)))
201 (ly:context-set-property! tr 'barNumberVisibility (modulo-bar-number-visible n (modulo bn n)))))
203 (define-public (first-bar-number-invisible barnum) (> barnum 1))
205 (define-public (all-bar-numbers-visible barnum) #t)
207 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
208 ;; percent repeat counters
210 (define-public ((every-nth-repeat-count-visible n) count context) (= 0 (modulo count n)))
212 (define-public (all-repeat-counts-visible count context) #t)
214 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
217 (define-public all-visible #(#t #t #t))
218 (define-public begin-of-line-invisible #(#t #t #f))
219 (define-public center-invisible #(#t #f #t))
220 (define-public end-of-line-invisible #(#f #t #t))
221 (define-public begin-of-line-visible #(#f #f #t))
222 (define-public center-visible #(#f #t #f))
223 (define-public end-of-line-visible #(#t #f #f))
224 (define-public all-invisible #(#f #f #f))
226 (define-public spanbar-begin-of-line-invisible
229 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
233 ;; How should a bar line behave at a break?
234 (define bar-glyph-alist
235 '((":|:" . (":|" . "|:"))
236 (":|.|:" . (":|" . "|:"))
237 (":|.:" . (":|" . "|:"))
238 ("||:" . ("||" . "|:"))
239 ("dashed" . ("dashed" . '()))
241 ("||:" . ("||" . "|:"))
243 ("|:" . ("|" . "|:"))
246 ;; hmm... should we end with a bar line here?
247 (".|" . ("|" . ".|"))
250 (".|." . (".|." . ()))
251 ("|.|" . ("|.|" . ()))
256 ("empty" . (() . ()))
257 ("brace" . (() . "brace"))
258 ("bracket" . (() . "bracket"))
261 (define-public (bar-line::calc-glyph-name grob)
263 (glyph (ly:grob-property grob 'glyph))
264 (dir (ly:item-break-dir grob))
265 (result (assoc glyph bar-glyph-alist))
266 (glyph-name (if (= dir CENTER)
268 (if (and result (string? (index-cell (cdr result) dir)))
269 (index-cell (cdr result) dir)
274 (define-public (bar-line::calc-break-visibility grob)
275 (let* ((glyph (ly:grob-property grob 'glyph))
276 (result (assoc glyph bar-glyph-alist)))
278 (vector (string? (cadr result)) #t (string? (cddr result)))
282 (define-public (shift-right-at-line-begin g)
283 "Shift an item to the right, but only at the start of the line."
284 (if (and (ly:item? g)
285 (equal? (ly:item-break-dir g) RIGHT))
286 (ly:grob-translate-axis! g 3.5 X)))
289 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
292 (define-public (tuplet-number::calc-denominator-text grob)
293 (number->string (ly:event-property (event-cause grob) 'denominator)))
295 (define-public (tuplet-number::calc-fraction-text grob)
297 ((ev (event-cause grob)))
300 (ly:event-property ev 'denominator)
301 (ly:event-property ev 'numerator))))
304 ; a formatter function, which is simply a wrapper around an existing
305 ; tuplet formatter function. It takes the value returned by the given
306 ; function and appends a note of given length.
307 (define-public ((tuplet-number::append-note-wrapper function note) grob)
308 (let* ((txt (if function (function grob) #f)))
310 (markup txt #:fontsize -5 #:note note UP)
311 (markup #:fontsize -5 #:note note UP))))
313 ; Print a tuplet denominator with a different number than the one derived from
314 ; the actual tuplet fraction
315 (define-public ((tuplet-number::non-default-tuplet-denominator-text denominator) grob)
316 (number->string (if denominator
318 (ly:event-property (event-cause grob) 'denominator))))
320 ; Print a tuplet fraction with different numbers than the ones derived from
321 ; the actual tuplet fraction
322 (define-public ((tuplet-number::non-default-tuplet-fraction-text denominator numerator) grob)
323 (let* ((ev (event-cause grob))
324 (den (if denominator denominator (ly:event-property ev 'denominator)))
325 (num (if numerator numerator (ly:event-property ev 'numerator))))
326 (format "~a:~a" den num)))
328 ; Print a tuplet fraction with note durations appended to the numerator and the
330 (define-public ((tuplet-number::fraction-with-notes denominatornote numeratornote) grob)
331 (let* ((ev (event-cause grob))
332 (denominator (ly:event-property ev 'denominator))
333 (numerator (ly:event-property ev 'numerator)))
334 ((tuplet-number::non-default-fraction-with-notes denominator denominatornote numerator numeratornote) grob)))
336 ; Print a tuplet fraction with note durations appended to the numerator and the
338 (define-public ((tuplet-number::non-default-fraction-with-notes denominator denominatornote numerator numeratornote) grob)
339 (let* ((ev (event-cause grob))
340 (den (if denominator denominator (ly:event-property ev 'denominator)))
341 (num (if numerator numerator (ly:event-property ev 'numerator))))
342 (make-concat-markup (list
343 (make-simple-markup (format "~a" den))
344 (markup #:fontsize -5 #:note denominatornote UP)
345 (make-simple-markup " : ")
346 (make-simple-markup (format "~a" num))
347 (markup #:fontsize -5 #:note numeratornote UP)))))
350 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
353 (define-public color? list?)
354 (define-public (rgb-color r g b) (list r g b))
357 (define-public black '(0.0 0.0 0.0))
358 (define-public white '(1.0 1.0 1.0))
359 (define-public red '(1.0 0.0 0.0))
360 (define-public green '(0.0 1.0 0.0))
361 (define-public blue '(0.0 0.0 1.0))
362 (define-public cyan '(0.0 1.0 1.0))
363 (define-public magenta '(1.0 0.0 1.0))
364 (define-public yellow '(1.0 1.0 0.0))
366 (define-public grey '(0.5 0.5 0.5))
367 (define-public darkred '(0.5 0.0 0.0))
368 (define-public darkgreen '(0.0 0.5 0.0))
369 (define-public darkblue '(0.0 0.0 0.5))
370 (define-public darkcyan '(0.0 0.5 0.5))
371 (define-public darkmagenta '(0.5 0.0 0.5))
372 (define-public darkyellow '(0.5 0.5 0.0))
374 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
378 (define-public (key-signature-interface::alteration-position step alter c0-position)
379 ;; TODO: memoize - this is mostly constant.
381 ;; fes, ges, as and bes typeset in lower octave
382 (define FLAT_TOP_PITCH 2)
384 ;; ais and bis typeset in lower octave
385 (define SHARP_TOP_PITCH 4)
388 (+ (cdr step) (* (car step) 7) c0-position)
390 ((from-bottom-pos (modulo (+ 4 49 c0-position) 7))
392 (c0 (- from-bottom-pos 4)))
395 (or (and (< alter 0) (or (> p FLAT_TOP_PITCH) (> (+ p c0) 4)) (> (+ p c0) 1))
396 (and (> alter 0) (or (> p SHARP_TOP_PITCH) (> (+ p c0) 5)) (> (+ p c0) 2))
399 ;; Typeset below c_position
402 ;; Provide for the four cases in which there's a glitch
403 ;; it's a hack, but probably not worth
404 ;; the effort of finding a nicer solution.
407 ((and (= c0 2) (= p 3) (> alter 0))
409 ((and (= c0 -3) (= p -1) (> alter 0))
411 ((and (= c0 -4) (= p -1) (< alter 0))
413 ((and (= c0 -2) (= p -3) (< alter 0))
419 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
422 (define-public (accidental-interface::calc-alteration grob)
423 (ly:pitch-alteration (ly:event-property (event-cause grob) 'pitch)))
426 (define-public cancellation-glyph-name-alist
427 '((0 . "accidentals.natural")))
429 (define-public standard-alteration-glyph-name-alist
431 ;; ordered for optimal performance.
432 (0 . "accidentals.natural")
433 (-1/2 . "accidentals.flat")
434 (1/2 . "accidentals.sharp")
436 (1 . "accidentals.doublesharp")
437 (-1 . "accidentals.flatflat")
439 (3/4 . "accidentals.sharp.slashslash.stemstemstem")
440 (1/4 . "accidentals.sharp.slashslash.stem")
441 (-1/4 . "accidentals.mirroredflat")
442 (-3/4 . "accidentals.mirroredflat.flat")
445 ;; FIXME: standard vs default, alteration-FOO vs FOO-alteration
446 (define-public alteration-default-glyph-name-alist standard-alteration-glyph-name-alist)
448 (define-public makam-alteration-glyph-name-alist
449 '((1 . "accidentals.doublesharp")
450 (8/9 . "accidentals.sharp.slashslashslash.stemstem")
451 (5/9 . "accidentals.sharp.slashslashslash.stem")
452 (4/9 . "accidentals.sharp")
453 (1/9 . "accidentals.sharp.slashslash.stem")
454 (0 . "accidentals.natural")
455 (-1/9 . "accidentals.mirroredflat")
456 (-4/9 . "accidentals.flat.slash")
457 (-5/9 . "accidentals.flat")
458 (-8/9 . "accidentals.flat.slashslash")
459 (-1 . "accidentals.flatflat")
462 (define-public alteration-hufnagel-glyph-name-alist
463 '((-1/2 . "accidentals.hufnagelM1")
464 (0 . "accidentals.vaticana0")
465 (1/2 . "accidentals.mensural1")))
467 (define-public alteration-medicaea-glyph-name-alist
468 '((-1/2 . "accidentals.medicaeaM1")
469 (0 . "accidentals.vaticana0")
470 (1/2 . "accidentals.mensural1")))
472 (define-public alteration-vaticana-glyph-name-alist
473 '((-1/2 . "accidentals.vaticanaM1")
474 (0 . "accidentals.vaticana0")
475 (1/2 . "accidentals.mensural1")))
477 (define-public alteration-mensural-glyph-name-alist
478 '((-1/2 . "accidentals.mensuralM1")
479 (0 . "accidentals.vaticana0")
480 (1/2 . "accidentals.mensural1")))
483 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
484 ;; * Pitch Trill Heads
487 (define-public (parentheses-item::calc-parenthesis-stencils grob)
488 (let* ((font (ly:grob-default-font grob))
489 (lp (ly:font-get-glyph font "accidentals.leftparen"))
490 (rp (ly:font-get-glyph font "accidentals.rightparen")))
495 (define-public (grob-interpret-markup grob text)
497 ((layout (ly:grob-layout grob))
498 (defs (ly:output-def-lookup layout 'text-font-defaults))
499 (props (ly:grob-alist-chain grob defs)))
501 (ly:text-interface::interpret-markup
504 (define-public (parentheses-item::calc-angled-bracket-stencils grob)
506 (font (ly:grob-default-font grob))
507 (lp (ly:stencil-aligned-to (ly:stencil-aligned-to (grob-interpret-markup grob (ly:wide-char->utf-8 #x2329))
509 (rp (ly:stencil-aligned-to (ly:stencil-aligned-to (grob-interpret-markup grob (ly:wide-char->utf-8 #x232A))
513 (list (stencil-whiteout lp)
514 (stencil-whiteout rp))))
516 (define (parenthesize-elements grob . rest)
518 ((refp (if (null? rest)
521 (elts (ly:grob-object grob 'elements))
522 (x-ext (ly:relative-group-extent elts refp X))
523 (stencils (ly:grob-property grob 'stencils))
526 (padding (ly:grob-property grob 'padding 0.1)))
529 (ly:stencil-translate-axis lp (- (car x-ext) padding) X)
530 (ly:stencil-translate-axis rp (+ (cdr x-ext) padding) X))
534 (define (parentheses-item::print me)
536 ((elts (ly:grob-object me 'elements))
537 (y-ref (ly:grob-common-refpoint-of-array me elts Y))
538 (x-ref (ly:grob-common-refpoint-of-array me elts X))
539 (stencil (parenthesize-elements me x-ref))
540 (elt-y-ext (ly:relative-group-extent elts y-ref Y))
541 (y-center (interval-center elt-y-ext)))
543 (ly:stencil-translate
547 (ly:grob-relative-coordinate me x-ref X))
550 (ly:grob-relative-coordinate me y-ref Y))))
555 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
558 (define-public (chain-grob-member-functions grob value . funcs)
561 (set! value (func grob value)))
566 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
569 (define-public (bend::print spanner)
571 (< (abs (- a b)) 0.01))
574 ((delta-y (* 0.5 (ly:grob-property spanner 'delta-position)))
575 (left-span (ly:spanner-bound spanner LEFT))
576 (dots (if (and (grob::has-interface left-span 'note-head-interface)
577 (ly:grob? (ly:grob-object left-span 'dot)))
578 (ly:grob-object left-span 'dot) #f))
580 (right-span (ly:spanner-bound spanner RIGHT))
581 (thickness (* (ly:grob-property spanner 'thickness)
582 (ly:output-def-lookup (ly:grob-layout spanner)
584 (padding (ly:grob-property spanner 'padding 0.5))
585 (common (ly:grob-common-refpoint right-span
586 (ly:grob-common-refpoint spanner
589 (common-y (ly:grob-common-refpoint spanner left-span Y))
591 (max (interval-end (ly:grob-robust-relative-extent
595 (close (ly:grob-relative-coordinate dots common-y Y)
596 (ly:grob-relative-coordinate spanner common-y Y)))
597 (interval-end (ly:grob-robust-relative-extent dots common X))
598 -10000) ;; TODO: use real infinity constant.
600 (right-x (- (interval-start
601 (ly:grob-robust-relative-extent right-span common X))
603 (self-x (ly:grob-relative-coordinate spanner common X))
604 (dx (- right-x left-x))
605 (exp (list 'path thickness
613 ,dx ,(* 0.66 delta-y)
619 (cons (- left-x self-x) (- right-x self-x))
620 (cons (min 0 delta-y)
623 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
627 (define-public (grace-spacing::calc-shortest-duration grob)
629 ((cols (ly:grob-object grob 'columns))
632 (ly:moment-sub (ly:grob-property
633 (ly:grob-array-ref cols (1+ idx)) 'when)
635 (ly:grob-array-ref cols idx) 'when))))
637 (moment-min (lambda (x y)
640 (if (ly:moment<? x y)
646 (fold moment-min #f (map get-difference
647 (iota (1- (ly:grob-array-length cols)))))))
651 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
654 (define-public (fingering::calc-text grob)
656 ((event (event-cause grob))
657 (digit (ly:event-property event 'digit)))
660 (ly:input-message (ly:event-property event 'origin)
661 "Warning: Fingering notation for finger number ~a" digit))
663 (number->string digit 10)
666 (define-public (string-number::calc-text grob)
668 ((digit (ly:event-property (event-cause grob) 'string-number)))
670 (number->string digit 10)
674 (define-public (stroke-finger::calc-text grob)
676 ((digit (ly:event-property (event-cause grob) 'digit))
677 (text (ly:event-property (event-cause grob) 'text)))
681 (vector-ref (ly:grob-property grob 'digit-names) (1- (max (min 5 digit) 1))))))
683 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
685 (define-public (hairpin::calc-grow-direction grob)
686 (if (eq? (ly:event-property (event-cause grob) 'class) 'decrescendo-event)
691 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
694 (define-public (lyric-text::print grob)
695 "Allow interpretation of tildes as lyric tieing marks."
698 ((text (ly:grob-property grob 'text)))
700 (grob-interpret-markup grob
702 (make-tied-lyric-markup text)
705 (define-public ((grob::calc-property-by-copy prop) grob)
706 (ly:event-property (event-cause grob) prop))
708 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
711 (define-public (fret-board::calc-stencil grob)
712 (grob-interpret-markup
714 (make-fret-diagram-verbose-markup
715 (ly:grob-property grob 'dot-placement-list))))
717 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
720 (define-public (script-interface::calc-x-offset grob)
721 (ly:grob-property grob 'positioning-done)
722 (let* ((shift (ly:grob-property grob 'toward-stem-shift 0.0))
723 (note-head-location (ly:self-alignment-interface::centered-on-x-parent grob))
724 (note-head-grob (ly:grob-parent grob X))
725 (stem-grob (ly:grob-object note-head-grob 'stem)))
726 (+ note-head-location
727 ;; If the property 'toward-stem-shift is defined and the script has the
728 ;; same direction as the stem, move the script accordingly. Since scripts can
729 ;; also be over skips, we need to check whether the grob has a stem at all.
730 (if (ly:grob? stem-grob)
731 (let ((dir1 (ly:grob-property grob 'direction))
732 (dir2 (ly:grob-property stem-grob 'direction)))
733 (if (equal? dir1 dir2)
734 (let* ((common-refp (ly:grob-common-refpoint grob stem-grob X))
735 (stem-location (ly:grob-relative-coordinate stem-grob common-refp X)))
736 (* shift (- stem-location
737 note-head-location)))