scm/translation-functions.scm

   1 ;;;; translation-functions.scm --
   2 ;;;;
   3 ;;;;  source file of the GNU LilyPond music typesetter
   4 ;;;;
   5 ;;;; (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   6 ;;;;                 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8 ;; metronome marks
   9 (define-public (format-metronome-markup text dur count context)
  10   (let* ((hide_note (eq? #t (ly:context-property context 'tempoHideNote)))
  11          (note-mark (if (and (not hide_note) (ly:duration? dur))
  12                       (make-smaller-markup
  13                        (make-note-by-number-markup (ly:duration-log dur)
  14                                                    (ly:duration-dot-count dur)
  15                                                    1))
  16                       #f))
  17          (note-markup (if (and note-mark (number? count) (> count 0) )
  18                         (make-concat-markup (list
  19                           (make-general-align-markup Y DOWN note-mark)
  20                           (make-simple-markup " ")
  21                           (make-simple-markup  "=")
  22                           (make-simple-markup " ")
  23                           (make-simple-markup (number->string count))))
  24                         #f))
  25          (text-markup (if (not (null? text))
  26                         (make-bold-markup text)
  27                         #f)))
  28     (if text-markup
  29       (if note-markup
  30         (make-line-markup (list text-markup
  31           (make-concat-markup (list (make-simple-markup "(")
  32                                     note-markup
  33                                     (make-simple-markup ")")))))
  34         (make-line-markup (list text-markup))
  35       )
  36       (if note-markup
  37         (make-line-markup (list note-markup))
  38         #f
  39       )
  40     )
  41   )
  42 )
  43
  44 (define-public (format-mark-alphabet mark context)
  45   (make-bold-markup (make-markalphabet-markup (1- mark))))
  46
  47 (define-public (format-mark-box-alphabet mark context)
  48   (make-bold-markup (make-box-markup (make-markalphabet-markup (1- mark)))))
  49
  50 (define-public (format-mark-circle-alphabet mark context)
  51   (make-bold-markup (make-circle-markup (make-markalphabet-markup (1- mark)))))
  52
  53 (define-public (format-mark-letters mark context)
  54   (make-bold-markup (make-markletter-markup (1- mark))))
  55
  56 (define-public (format-mark-numbers mark context)
  57   (make-bold-markup (number->string mark)))
  58
  59 (define-public (format-mark-barnumbers mark context)
  60   (make-bold-markup (number->string (ly:context-property context 'currentBarNumber))))
  61
  62 (define-public (format-mark-box-letters mark context)
  63   (make-bold-markup (make-box-markup (make-markletter-markup (1- mark)))))
  64
  65 (define-public (format-mark-circle-letters mark context)
  66   (make-bold-markup (make-circle-markup (make-markletter-markup (1- mark)))))
  67
  68 (define-public (format-mark-box-numbers mark context)
  69   (make-bold-markup (make-box-markup (number->string mark))))
  70
  71 (define-public (format-mark-circle-numbers mark context)
  72   (make-bold-markup (make-circle-markup (number->string mark))))
  73
  74 (define-public (format-mark-box-barnumbers mark context)
  75   (make-bold-markup (make-box-markup
  76     (number->string (ly:context-property context 'currentBarNumber)))))
  77
  78 (define-public (format-mark-circle-barnumbers mark context)
  79   (make-bold-markup (make-circle-markup
  80     (number->string (ly:context-property context 'currentBarNumber)))))
  81
  82
  83 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  84 ;; Bass figures.
  85 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  86
  87 (define-public (format-bass-figure figure event context)
  88   (let* ((fig (ly:event-property event 'figure))
  89          (fig-markup (if (number? figure)
  90
  91                          ;; this is not very elegant, but center-aligning all digits
  92                          ;; is problematic with other markups, and shows problems
  93                          ;; in the (lack of) overshoot of feta alphabet glyphs.
  94
  95                          ((if (<= 10 figure)
  96                               (lambda (y) (make-translate-scaled-markup (cons -0.7 0) y))
  97                               identity)
  98
  99                           (cond
 100                                 ((eq? #t (ly:event-property event 'diminished))
 101                                          (markup #:slashed-digit figure))
 102                                 ((eq? #t (ly:event-property event 'augmented-slash))
 103                                          (markup #:backslashed-digit figure))
 104                                 (else (markup #:number (number->string figure 10)))))
 105                          #f
 106                          ))
 107          (alt (ly:event-property event 'alteration))
 108          (alt-markup
 109           (if (number? alt)
 110               (markup
 111                #:general-align Y DOWN #:fontsize
 112                (if (not (= alt DOUBLE-SHARP))
 113                    -2 2)
 114                (alteration->text-accidental-markup alt))
 115
 116               #f))
 117          (plus-markup (if (eq? #t (ly:event-property event 'augmented))
 118                           (markup #:number "+")
 119                           #f))
 120
 121          (alt-dir (ly:context-property context 'figuredBassAlterationDirection))
 122          (plus-dir (ly:context-property context 'figuredBassPlusDirection))
 123          )
 124
 125     (if (and (not fig-markup) alt-markup)
 126         (begin
 127           (set! fig-markup (markup #:left-align #:pad-around 0.3 alt-markup))
 128           (set! alt-markup #f)))
 129
 130
 131     ;; hmm, how to get figures centered between note, and
 132     ;; lone accidentals too?
 133
 134     ;;    (if (markup? fig-markup)
 135     ;;  (set!
 136     ;;   fig-markup (markup #:translate (cons 1.0 0)
 137     ;;                      #:hcenter fig-markup)))
 138
 139     (if alt-markup
 140         (set! fig-markup
 141               (markup #:put-adjacent
 142                       fig-markup X
 143                       (if (number? alt-dir)
 144                           alt-dir
 145                           LEFT)
 146                       #:pad-x 0.2 alt-markup
 147                       )))
 148
 149
 150     (if plus-markup
 151         (set! fig-markup
 152               (if fig-markup
 153                   (markup #:put-adjacent
 154                           fig-markup
 155                           X (if (number? plus-dir)
 156                                 plus-dir
 157                                 LEFT)
 158                           #:pad-x 0.2 plus-markup)
 159                   plus-markup)))
 160
 161     (if (markup? fig-markup)
 162         (markup #:fontsize -2 fig-markup)
 163         empty-markup)
 164
 165     ))
 166
 167 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 168 ;; fret diagrams
 169
 170 (define-public (determine-frets context grob notes string-numbers)
 171   (define (ensure-number a b)
 172     (if (number? a)
 173         a
 174         b))
 175 (let*
 176       ((tunings (ly:context-property context 'stringTunings))
 177        (details (ly:grob-property grob 'fret-diagram-details))
 178        (minimum-fret (ensure-number
 179                       (ly:context-property context 'minimumFret) 0))
 180        (max-stretch (ensure-number
 181                       (ly:context-property context 'maximumFretStretch) 4))
 182        (string-frets (determine-frets-mf notes string-numbers
 183                                          minimum-fret max-stretch
 184                                          tunings)))
 185
 186   (set! (ly:grob-property grob 'fret-diagram-details)
 187           (if (null? details)
 188               (acons 'string-count (length tunings) '())
 189               (acons 'string-count (length tunings) details)))
 190   (set! (ly:grob-property grob 'string-fret-finger-combinations) string-frets)))
 191
 192 (define-public (determine-frets-mf notes string-numbers
 193                                    minimum-fret max-stretch
 194                                    tunings)
 195
 196   (define (calc-fret pitch string tuning)
 197     (- (ly:pitch-semitones pitch) (list-ref tuning (1- string))))
 198
 199   (define (note-pitch a)
 200     (ly:event-property a 'pitch))
 201
 202   (define (note-pitch<? a b)
 203     (ly:pitch<? (note-pitch a)
 204                 (note-pitch b)))
 205
 206   (define (note-finger ev)
 207     (let* ((articulations (ly:event-property ev 'articulations))
 208            (finger-found #f))
 209
 210       (map (lambda (art)
 211              (let*
 212                  ((num (ly:event-property art 'digit)))
 213
 214                (if (and (eq? 'fingering-event (ly:event-property art 'class))
 215                         (number? num))
 216                    (set! finger-found num))))
 217            articulations)
 218
 219       finger-found))
 220
 221   (define (note-string ev)
 222     (let* ((articulations (ly:event-property ev 'articulations))
 223            (string-found #f))
 224
 225       (map (lambda (art)
 226              (let*
 227                  ((num (ly:event-property art 'string-number)))
 228
 229                (if (number? num)
 230                    (set! string-found num))))
 231            articulations)
 232
 233       string-found))
 234
 235   (define (del-string string)
 236                       (if (number? string)
 237                           (set! free-strings
 238                                 (delete string free-strings))))
 239   (define specified-frets '())
 240   (define free-strings '())
 241
 242   (define (close-enough fret)
 243                        (reduce
 244                         (lambda (x y)
 245                           (and x y))
 246                         #t
 247                         (map (lambda (specced-fret)
 248                                (> max-stretch (abs (- fret specced-fret))))
 249                              specified-frets)
 250                         ))
 251
 252   (define (string-qualifies string pitch)
 253     (let*
 254         ((fret (calc-fret pitch string tunings)))
 255
 256          (and (>= fret minimum-fret)
 257               (close-enough fret))
 258
 259          ))
 260
 261   (define string-fret-fingering-tuples '())
 262   (define (set-fret note string)
 263                     (set! string-fret-fingering-tuples
 264                           (cons (list string
 265                                       (calc-fret (ly:event-property note 'pitch)
 266                                                  string tunings)
 267                                       (note-finger note))
 268                                 string-fret-fingering-tuples))
 269                     (del-string string))
 270
 271
 272   ;;; body.
 273   (set! specified-frets
 274         (filter identity (map
 275                       (lambda (note)
 276                         (if (note-string note)
 277                             (calc-fret (note-pitch note)
 278                                        (note-string note) tunings)
 279                             #f))
 280                       notes)))
 281
 282
 283   (set! free-strings (map 1+ (iota (length tunings))))
 284
 285   (for-each (lambda (note)
 286               (del-string (note-string note)))
 287             notes)
 288
 289
 290   (for-each
 291    (lambda (note)
 292      (if (note-string note)
 293          (set-fret note (note-string note))
 294          (let*
 295              ((string (find (lambda (string) (string-qualifies string
 296                                                                (note-pitch note)))
 297                               (reverse free-strings))))
 298            (if string
 299                (set-fret note string)
 300                (ly:warning "No string for pitch ~a (given frets ~a)" (note-pitch note)
 301                            specified-frets))
 302
 303                )))
 304    (sort notes note-pitch<?))
 305
 306   string-fret-fingering-tuples)