1 ;;;; output-lib.scm -- implement Scheme output helper functions
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 ; Tablature functions, by Jiba (jiba@tuxfamily.org)
10 ; The TabNoteHead stem attachment function.
11 (define (tablature-stem-attachment-function style duration)
15 ; The TabNoteHead tablatureFormat callback.
16 ; Compute the text grob-property
17 (define-public (fret-number-tablature-format string tuning pitch)
19 (- (ly:pitch-semitones pitch)
21 (- string 1) ; remove 1 because list index starts at 0 and guitar string at 1.
25 (define-public (hammer-print-function grob)
26 (let* ((note-collums (ly:grob-property grob 'note-columns))
27 (note-column1 (cadr note-collums))
28 (note-column2 (car note-collums))
29 (note1 (car (ly:grob-property note-column1 'note-heads)))
30 (note2 (car (ly:grob-property note-column2 'note-heads)))
31 (text1 (ly:grob-property note1 'text))
32 (text2 (ly:grob-property note2 'text))
33 (fret1 (if (string? text1) (string->number text1) 0))
34 (fret2 (if (string? text2) (string->number text2) 0))
41 (let* ((slur (Slur::print grob))
42 (paper (ly:grob-paper grob))
43 (text (interpret-markup
45 (ly:grob-alist-chain grob (ly:paper-lookup paper 'text-font-defaults))
48 (let ((x (/ (- (cdr (ly:stencil-extent slur 0))
49 (/ (cdr (ly:stencil-extent text 0)) 2.0)
53 (ly:stencil-set-extent! text 0 (cons x x))
54 (ly:stencil-align-to! text 0 1)
57 (ly:stencil-combine-at-edge slur 1 1 text -0.6)
62 (define-public guitar-tunings '(4 -1 -5 -10 -15 -20))
64 ; end of tablature functions
67 (define-public (make-stencil-boxer line-thick x-padding y-padding callback)
68 "Makes a routine that adds a box around the grob parsed as argument"
69 (define (stencil-boxer grob)
73 (x-ext (interval-widen (ly:stencil-extent mol 0) x-padding))
74 (y-ext (interval-widen (ly:stencil-extent mol 1) y-padding))
75 (x-rule (make-filled-box-stencil (interval-widen x-ext line-thick)
77 (y-rule (make-filled-box-stencil (cons 0 line-thick) y-ext))
80 (set! mol (ly:stencil-combine-at-edge mol 0 1 y-rule x-padding))
81 (set! mol (ly:stencil-combine-at-edge mol 0 -1 y-rule x-padding))
82 (set! mol (ly:stencil-combine-at-edge mol 1 1 x-rule 0))
83 (set! mol (ly:stencil-combine-at-edge mol 1 -1 x-rule 0))
90 (define-public (arg->string arg)
91 (cond ((number? arg) (inexact->string arg 10))
92 ((string? arg) (string-append "\"" arg "\""))
93 ((symbol? arg) (string-append "\"" (symbol->string arg) "\""))))
95 (define-public (func name . args)
101 (map (lambda (x) (string-append " " (arg->string x))) args)))
104 ;;(define (mm-to-pt x)
105 ;; (* (/ 72.27 25.40) x))
107 ;; do nothing in .scm output
108 (define-public (comment s) "")
110 (define-public (numbers->string lst)
111 (apply string-append (map ly:number->string lst)))
113 (define (number->octal-string x)
114 (let* ((n (inexact->exact x))
115 (n64 (quotient n 64))
116 (n8 (quotient (- n (* n64 64)) 8)))
120 (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
122 (define-public (inexact->string x radix)
123 (let ((n (inexact->exact x)))
124 (number->string n radix)))
127 (define-public (number-pair->string c)
128 (string-append (ly:number->string (car c)) " "
129 (ly:number->string (cdr c)) " "))
134 (make-string 1 (integer->char (+ (char->integer #\A) i)))))
136 (define (scm-scm action-name)
141 (define-public (find-notehead-symbol duration style)
143 ((xcircle) "2xcircle")
144 ((harmonic) "0harmonic")
146 ;; Oops, I actually would not call this "baroque", but, for
147 ;; backwards compatibility to 1.4, this is supposed to take
148 ;; brevis, longa and maxima from the neo-mensural font and all
149 ;; other note heads from the default font. -- jr
151 (string-append (number->string duration) "neo_mensural")
152 (number->string duration)))
154 (string-append (number->string duration) (symbol->string style)))
156 (string-append (number->string duration) (symbol->string style)))
158 ;; The default font in mf/feta-bolletjes.mf defines a brevis, but
159 ;; neither a longa nor a maxima. Hence let us, for the moment,
160 ;; take these from the neo-mensural font. TODO: mf/feta-bolletjes
161 ;; should define at least a longa for the default font. The longa
162 ;; should look exactly like the brevis of the default font, but
163 ;; with a stem exactly like that of the quarter note. -- jr
165 (string-append (number->string duration) "neo_mensural")
166 (number->string duration)))
168 (if (string-match "vaticana*|hufnagel*|medicaea*" (symbol->string style))
169 (symbol->string style)
170 (string-append (number->string (max 0 duration))
171 (symbol->string style))))))
174 ;; TODO junk completely?
175 (define (note-head-style->attachment-coordinates grob axis)
176 "Return pair (X . Y), containing multipliers for the note head
177 bounding box, where to attach the stem. e.g.: X==0 means horizontally
178 centered, X==1 is at the right, X == -1 is at the left."
183 (define-public (string-encode-integer i)
186 ((< i 0) (string-append "n" (string-encode-integer (- i))))
188 (make-string 1 (integer->char (+ 65 (modulo i 26))))
189 (string-encode-integer (quotient i 26))))))
192 (define-public ((every-nth-bar-number-visible n) barnum) (= 0 (modulo barnum n)))
194 (define-public ((modulo-bar-number-visible n m) barnum) (and (> barnum 1) (= m (modulo barnum n))))
196 (define-public ((set-bar-number-visibility n) tr)
197 (let* ((bn (ly:context-property tr 'currentBarNumber)))
198 (ly:context-set-property! tr 'barNumberVisibility (modulo-bar-number-visible n (modulo bn n)))))
200 (define-public (default-bar-number-visibility barnum) (> barnum 1))
202 ;; See documentation of Item::visibility_lambda_
203 (define-public (begin-of-line-visible d) (if (= d 1) '(#f . #f) '(#t . #t)))
204 (define-public (end-of-line-visible d) (if (= d -1) '(#f . #f) '(#t . #t)))
205 (define-public (spanbar-begin-of-line-invisible d) (if (= d -1) '(#t . #t) '(#f . #f)))
207 (define-public (all-visible d) '(#f . #f))
208 (define-public (all-invisible d) '(#t . #t))
209 (define-public (begin-of-line-invisible d) (if (= d 1) '(#t . #t) '(#f . #f)))
210 (define-public (end-of-line-invisible d) (if (= d -1) '(#t . #t) '(#f . #f)))
213 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
217 ; How should a bar line behave at a break?
219 ;; Why prepend `default-' to every scm identifier?
220 (define-public (default-break-barline glyph dir)
221 (let ((result (assoc glyph
222 '((":|:" . (":|" . "|:"))
223 ("||:" . ("||" . "|:"))
225 ("||:" . ("||" . "|:"))
227 ("|:" . ("|" . "|:"))
230 ;; hmm... should we end with a barline here?
231 (".|" . ("|" . ".|"))
234 (".|." . (".|." . ()))
237 ("empty" . (() . ()))
238 ("brace" . (() . "brace"))
239 ("bracket" . (() . "bracket"))
243 (if (equal? result #f)
244 (ly:warn (string-append "Unknown bar glyph: `" glyph "'"))
245 (index-cell (cdr result) dir))
250 (define-public (shift-right-at-line-begin g)
251 "Shift an item to the right, but only at the start of the line."
252 (if (and (ly:item? g) (equal? (ly:item-break-dir g) RIGHT))
253 (ly:grob-translate-axis! g 3.5 X)