2 ;;;; lily-library.scm -- utilities
4 ;;;; source file of the GNU LilyPond music typesetter
6 ;;;; (c) 1998--2008 Jan Nieuwenhuizen <janneke@gnu.org>
7 ;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
9 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
14 (define-safe-public START -1)
15 (define-safe-public STOP 1)
16 (define-public LEFT -1)
17 (define-public RIGHT 1)
19 (define-public DOWN -1)
20 (define-public CENTER 0)
22 (define-safe-public DOUBLE-FLAT-QTS -4)
23 (define-safe-public THREE-Q-FLAT-QTS -3)
24 (define-safe-public FLAT-QTS -2)
25 (define-safe-public SEMI-FLAT-QTS -1)
26 (define-safe-public NATURAL-QTS 0)
27 (define-safe-public SEMI-SHARP-QTS 1)
28 (define-safe-public SHARP-QTS 2)
29 (define-safe-public THREE-Q-SHARP-QTS 3)
30 (define-safe-public DOUBLE-SHARP-QTS 4)
31 (define-safe-public SEMI-TONE-QTS 2)
33 (define-safe-public DOUBLE-FLAT -1)
34 (define-safe-public THREE-Q-FLAT -3/4)
35 (define-safe-public FLAT -1/2)
36 (define-safe-public SEMI-FLAT -1/4)
37 (define-safe-public NATURAL 0)
38 (define-safe-public SEMI-SHARP 1/4)
39 (define-safe-public SHARP 1/2)
40 (define-safe-public THREE-Q-SHARP 3/4)
41 (define-safe-public DOUBLE-SHARP 1)
42 (define-safe-public SEMI-TONE 1/2)
44 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
47 (define-public ZERO-MOMENT (ly:make-moment 0 1))
49 (define-public (moment-min a b)
50 (if (ly:moment<? a b) a b))
52 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
54 (define-public (average x . lst)
55 (/ (+ x (apply + lst)) (1+ (length lst))))
57 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
58 ;; parser <-> output hooks.
60 (define-public (collect-bookpart-for-book parser book-part)
61 "Toplevel book-part handler"
62 (define (add-bookpart book-part)
64 parser 'toplevel-bookparts
65 (cons book-part (ly:parser-lookup parser 'toplevel-bookparts))))
66 ;; If toplevel scores have been found before this \bookpart,
67 ;; add them first to a dedicated bookpart
68 (if (pair? (ly:parser-lookup parser 'toplevel-scores))
70 (add-bookpart (ly:make-book-part
71 (ly:parser-lookup parser 'toplevel-scores)))
72 (ly:parser-define! parser 'toplevel-scores (list))))
73 (add-bookpart book-part))
75 (define-public (collect-scores-for-book parser score)
77 parser 'toplevel-scores
78 (cons score (ly:parser-lookup parser 'toplevel-scores))))
80 (define-public (collect-music-aux score-handler parser music)
81 (define (music-property symbol)
82 (let ((value (ly:music-property music symbol)))
83 (if (not (null? value))
86 (cond ((music-property 'page-marker)
87 ;; a page marker: set page break/turn permissions or label
89 (let ((label (music-property 'page-label)))
91 (score-handler (ly:make-page-label-marker label))))
92 (for-each (lambda (symbol)
93 (let ((permission (music-property symbol)))
94 (if (symbol? permission)
96 (ly:make-page-permission-marker symbol
97 (if (eqv? 'forbid permission)
100 (list 'line-break-permission 'page-break-permission
101 'page-turn-permission))))
102 ((not (music-property 'void))
103 ;; a regular music expression: make a score with this music
104 ;; void music is discarded
105 (score-handler (scorify-music music parser)))))
107 (define-public (collect-music-for-book parser music)
108 "Top-level music handler"
109 (collect-music-aux (lambda (score)
110 (collect-scores-for-book parser score))
114 (define-public (collect-book-music-for-book parser book music)
116 (collect-music-aux (lambda (score)
117 (ly:book-add-score! book score))
121 (define-public (scorify-music music parser)
124 (for-each (lambda (func)
125 (set! music (func music parser)))
126 toplevel-music-functions)
128 (ly:make-score music))
130 (define (print-book-with parser book process-procedure)
132 ((paper (ly:parser-lookup parser '$defaultpaper))
133 (layout (ly:parser-lookup parser '$defaultlayout))
134 (count (ly:parser-lookup parser 'output-count))
135 (base (ly:parser-output-name parser))
136 (output-suffix (ly:parser-lookup parser 'output-suffix)) )
138 (if (string? output-suffix)
139 (set! base (format "~a-~a" base (string-regexp-substitute
140 "[^a-zA-Z0-9-]" "_" output-suffix))))
142 ;; must be careful: output-count is under user control.
143 (if (not (integer? count))
147 (set! base (format #f "~a-~a" base count)))
148 (ly:parser-define! parser 'output-count (1+ count))
149 (process-procedure book paper layout base)
152 (define-public (print-book-with-defaults parser book)
153 (print-book-with parser book ly:book-process))
155 (define-public (print-book-with-defaults-as-systems parser book)
156 (print-book-with parser book ly:book-process-to-systems))
161 (define-public assoc-get ly:assoc-get)
163 (define-public (uniqued-alist alist acc)
164 (if (null? alist) acc
165 (if (assoc (caar alist) acc)
166 (uniqued-alist (cdr alist) acc)
167 (uniqued-alist (cdr alist) (cons (car alist) acc)))))
169 (define-public (alist<? x y)
170 (string<? (symbol->string (car x))
171 (symbol->string (car y))))
173 (define-public (chain-assoc-get x alist-list . default)
174 "Return ALIST entry for X. Return DEFAULT (optional, else #f) if not
177 (define (helper x alist-list default)
178 (if (null? alist-list)
180 (let* ((handle (assoc x (car alist-list))))
183 (helper x (cdr alist-list) default)))))
186 (if (pair? default) (car default) #f)))
188 (define (map-alist-vals func list)
189 "map FUNC over the vals of LIST, leaving the keys."
192 (cons (cons (caar list) (func (cdar list)))
193 (map-alist-vals func (cdr list)))))
195 (define (map-alist-keys func list)
196 "map FUNC over the keys of an alist LIST, leaving the vals. "
199 (cons (cons (func (caar list)) (cdar list))
200 (map-alist-keys func (cdr list)))))
202 (define-public (first-member members lst)
203 "Return first successful MEMBER of member from MEMBERS in LST."
206 (let ((m (member (car members) lst)))
207 (if m m (first-member (cdr members) lst)))))
209 (define-public (first-assoc keys lst)
210 "Return first successful ASSOC of key from KEYS in LST."
213 (let ((k (assoc (car keys) lst)))
214 (if k k (first-assoc (cdr keys) lst)))))
216 (define-public (flatten-alist alist)
221 (flatten-alist (cdr alist))))))
226 (define-public (vector-for-each proc vec)
229 ((>= i (vector-length vec)) vec)
230 (vector-set! vec i (proc (vector-ref vec i)))))
235 (define-public (hash-table->alist t)
236 (hash-fold (lambda (k v acc) (acons k v acc))
239 ;; todo: code dup with C++.
240 (define-safe-public (alist->hash-table lst)
241 "Convert alist to table"
242 (let ((m (make-hash-table (length lst))))
243 (map (lambda (k-v) (hashq-set! m (car k-v) (cdr k-v))) lst)
249 (define (functional-or . rest)
252 (apply functional-and (cdr rest)))
255 (define (functional-and . rest)
258 (apply functional-and (cdr rest)))
261 (define (split-list lst n)
262 "Split LST in N equal sized parts"
264 (define (helper todo acc-vector k)
271 (vector-set! acc-vector k (cons (car todo) (vector-ref acc-vector k)))
272 (helper (cdr todo) acc-vector (1- k)))))
274 (helper lst (make-vector n '()) (1- n)))
276 (define (list-element-index lst x)
277 (define (helper todo k)
280 ((equal? (car todo) x) k)
282 (helper (cdr todo) (1+ k)))))
286 (define-public (count-list lst)
287 "Given lst (E1 E2 .. ) return ((E1 . 1) (E2 . 2) ... ) "
289 (define (helper l acc count)
291 (helper (cdr l) (cons (cons (car l) count) acc) (1+ count))
295 (reverse (helper lst '() 1)))
297 (define-public (list-join lst intermediate)
298 "put INTERMEDIATE between all elts of LST."
303 (cons elem (cons intermediate prev))
307 (define-public (filtered-map proc lst)
313 (define (flatten-list lst)
317 (if (pair? (car lst))
318 (append (flatten-list (car lst)) (flatten-list (cdr lst)))
319 (cons (car lst) (flatten-list (cdr lst))))))
321 (define (list-minus a b)
322 "Return list of elements in A that are not in B."
323 (lset-difference eq? a b))
325 (define-public (uniq-list lst)
326 "Uniq LST, assuming that it is sorted. Uses equal? for comparisons."
329 (fold (lambda (x acc)
332 (if (equal? x (car acc))
337 (define (split-at-predicate predicate lst)
338 "Split LST = (a_1 a_2 ... a_k b_1 ... b_k)
339 into L1 = (a_1 ... a_k ) and L2 =(b_1 .. b_k)
340 Such that (PREDICATE a_i a_{i+1}) and not (PREDICATE a_k b_1).
341 L1 is copied, L2 not.
343 (split-at-predicate (lambda (x y) (= (- y x) 2)) '(1 3 5 9 11) (cons '() '()))"
347 (define (inner-split predicate lst acc)
351 (set-car! acc (cons (car lst) (car acc)))
353 ((predicate (car lst) (cadr lst))
354 (set-car! acc (cons (car lst) (car acc)))
355 (inner-split predicate (cdr lst) acc))
357 (set-car! acc (cons (car lst) (car acc)))
358 (set-cdr! acc (cdr lst))
361 (let* ((c (cons '() '())))
362 (inner-split predicate lst c)
363 (set-car! c (reverse! (car c)))
366 (define-public (split-list-by-separator lst sep?)
367 "(display (split-list-by-separator '(a b c / d e f / g) (lambda (x) (equal? x '/))))
369 ((a b c) (d e f) (g))
372 (define (split-one sep? lst acc)
373 "Split off the first parts before separator and return both parts."
378 (split-one sep? (cdr lst) (cons (car lst) acc)))))
382 (let* ((c (split-one sep? lst '())))
383 (cons (reverse! (car c) '()) (split-list-by-separator (cdr c) sep?)))))
385 (define-public (offset-add a b)
386 (cons (+ (car a) (car b))
387 (+ (cdr a) (cdr b))))
389 (define-public (offset-flip-y o)
390 (cons (car o) (- (cdr o))))
392 (define-public (offset-scale o scale)
393 (cons (* (car o) scale)
396 (define-public (ly:list->offsets accum coords)
399 (cons (cons (car coords) (cadr coords))
400 (ly:list->offsets accum (cddr coords)))))
402 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
405 (if (not (defined? 'nan?)) ;; guile 1.6 compat
406 (define-public (nan? x) (not (or (< 0.0 x)
410 (if (not (defined? 'inf?))
411 (define-public (inf? x) (= (/ 1.0 x) 0.0)))
413 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
416 (define-public (interval-length x)
417 "Length of the number-pair X, when an interval"
418 (max 0 (- (cdr x) (car x))))
420 (define-public interval-start car)
421 (define-public (ordered-cons a b)
425 (define-public interval-end cdr)
427 (define-public (interval-bound interval dir)
428 ((if (= dir RIGHT) cdr car) interval))
430 (define-public (interval-index interval dir)
431 "Interpolate INTERVAL between between left (DIR=-1) and right (DIR=+1)"
433 (* (+ (interval-start interval) (interval-end interval)
434 (* dir (- (interval-end interval) (interval-start interval))))
437 (define-public (interval-center x)
438 "Center the number-pair X, when an interval"
439 (if (interval-empty? x)
441 (/ (+ (car x) (cdr x)) 2)))
443 (define-public interval-start car)
444 (define-public interval-end cdr)
445 (define-public (interval-translate iv amount)
446 (cons (+ amount (car iv))
447 (+ amount (cdr iv))))
449 (define (other-axis a)
450 (remainder (+ a 1) 2))
452 (define-public (interval-widen iv amount)
453 (cons (- (car iv) amount)
454 (+ (cdr iv) amount)))
457 (define-public (interval-empty? iv)
458 (> (car iv) (cdr iv)))
460 (define-public (interval-union i1 i2)
461 (cons (min (car i1) (car i2))
462 (max (cdr i1) (cdr i2))))
464 (define-public (interval-sane? i)
465 (not (or (nan? (car i))
469 (> (car i) (cdr i)))))
472 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
475 (define-public (string-endswith s suffix)
476 (equal? suffix (substring s
477 (max 0 (- (string-length s) (string-length suffix)))
480 (define-public (string-startswith s prefix)
481 (equal? prefix (substring s 0 (min (string-length s) (string-length prefix)))))
483 (define-public (string-encode-integer i)
486 ((< i 0) (string-append "n" (string-encode-integer (- i))))
488 (make-string 1 (integer->char (+ 65 (modulo i 26))))
489 (string-encode-integer (quotient i 26))))))
491 (define (number->octal-string x)
492 (let* ((n (inexact->exact x))
493 (n64 (quotient n 64))
494 (n8 (quotient (- n (* n64 64)) 8)))
498 (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
500 (define-public (ly:inexact->string x radix)
501 (let ((n (inexact->exact x)))
502 (number->string n radix)))
504 (define-public (ly:number-pair->string c)
505 (string-append (ly:number->string (car c)) " "
506 (ly:number->string (cdr c))))
508 (define-public (dir-basename file . rest)
509 "Strip suffixes in REST, but leave directory component for FILE."
510 (define (inverse-basename x y) (basename y x))
511 (simple-format #f "~a/~a" (dirname file)
512 (fold inverse-basename file rest)))
514 (define-public (write-me message x)
515 "Return X. Display MESSAGE and write X. Handy for debugging,
516 possibly turned off."
517 (display message) (write x) (newline) x)
520 (define-public (stderr string . rest)
521 (apply format (cons (current-error-port) (cons string rest)))
522 (force-output (current-error-port)))
524 (define-public (debugf string . rest)
526 (apply stderr (cons string rest))))
528 (define (index-cell cell dir)
533 (define (cons-map f x)
534 "map F to contents of X"
535 (cons (f (car x)) (f (cdr x))))
537 (define-public (list-insert-separator lst between)
538 "Create new list, inserting BETWEEN between elements of LIST"
542 (cons x (cons between y))))
543 (fold-right conc #f lst))
545 (define-public (string-regexp-substitute a b str)
546 (regexp-substitute/global #f a str 'pre b 'post))
548 (define (regexp-split str regex)
550 (define end-of-prev-match 0)
551 (define (notice match)
553 (set! matches (cons (substring (match:string match)
557 (set! end-of-prev-match (match:end match)))
559 (regexp-substitute/global #f regex str notice 'post)
561 (if (< end-of-prev-match (string-length str))
564 (cons (substring str end-of-prev-match (string-length str)) matches)))
576 (define-public (car< a b)
579 (define-public (symbol<? lst r)
580 (string<? (symbol->string lst) (symbol->string r)))
582 (define-public (symbol-key<? lst r)
583 (string<? (symbol->string (car lst)) (symbol->string (car r))))
586 ;; don't confuse users with #<procedure .. > syntax.
588 (define-public (scm->string val)
589 (if (and (procedure? val) (symbol? (procedure-name val)))
590 (symbol->string (procedure-name val))
592 (if (self-evaluating? val) "" "'")
593 (call-with-output-string (lambda (port) (display val port))))))
595 (define-public (!= lst r)
598 (define-public lily-unit->bigpoint-factor
600 ((equal? (ly:unit) "mm") (/ 72.0 25.4))
601 ((equal? (ly:unit) "pt") (/ 72.0 72.27))
602 (else (ly:error (_ "unknown unit: ~S") (ly:unit)))))
604 (define-public lily-unit->mm-factor
605 (* 25.4 (/ lily-unit->bigpoint-factor 72)))
607 ;;; FONT may be font smob, or pango font string...
608 (define-public (font-name-style font)
609 ;; FIXME: ughr, (ly:font-name) sometimes also has Style appended.
610 (let* ((font-name (ly:font-name font))
611 (full-name (if font-name font-name (ly:font-file-name font)))
612 (name-style (string-split full-name #\-)))
613 ;; FIXME: ughr, barf: feta-alphabet is actually emmentaler
614 (if (string-prefix? "feta-alphabet" full-name)
616 (substring full-name (string-length "feta-alphabet")))
617 (if (not (null? (cdr name-style)))
619 (append name-style '("Regular"))))))
621 (define-public (modified-font-metric-font-scaling font)
622 (let* ((designsize (ly:font-design-size font))
623 (magnification (* (ly:font-magnification font)))
624 (scaling (* magnification designsize)))
625 (debugf "scaling:~S\n" scaling)
626 (debugf "magnification:~S\n" magnification)
627 (debugf "design:~S\n" designsize)
630 (define-public (version-not-seen-message input-file-name)
636 (_ "no \\version statement found, please add~afor future compatibility")
637 (format #f "\n\n\\version ~s\n\n" (lilypond-version)))))
639 (define-public (old-relative-not-used-message input-file-name)
644 (_ "old relative compatibility not used")))