1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 2006--2015 Erik Sandberg <mandolaerik@gmail.com>
5 ;;;; LilyPond is free software: you can redistribute it and/or modify
6 ;;;; it under the terms of the GNU General Public License as published by
7 ;;;; the Free Software Foundation, either version 3 of the License, or
8 ;;;; (at your option) any later version.
10 ;;;; LilyPond is distributed in the hope that it will be useful,
11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ;;;; GNU General Public License for more details.
15 ;;;; You should have received a copy of the GNU General Public License
16 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
18 ;; TODO: use separate module for syntax
19 ;; constructors. Also create wrapper around the constructor?
20 (defmacro define-ly-syntax (args . body)
21 `(define-public ,args ,@body))
23 ;; A ly-syntax constructor takes two extra parameters, parser and
24 ;; location. These are mainly used for reporting errors and
25 ;; warnings. This function is a syntactic sugar which uses the
26 ;; location arg to set the origin of the returned music object; this
27 ;; behaviour is usually desired
28 (defmacro define-ly-syntax-loc (args . body)
30 (let ((m ,(cons 'begin body)))
31 (set! (ly:music-property m 'origin) ,(third args))
33 ;; Like define-ly-syntax-loc, but adds parser and location
34 ;; parameters. Useful for simple constructors that don't need to
36 (defmacro define-ly-syntax-simple (args . body)
37 `(define-public ,(cons* (car args)
41 (let ((m ,(cons 'begin body)))
42 (set! (ly:music-property m 'origin) location)
45 (define (music-function-call-error parser loc fun m)
46 (let* ((sig (ly:music-function-signature fun))
47 (pred (if (pair? (car sig)) (caar sig) (car sig))))
48 (ly:parser-error parser
49 (format #f (_ "~a function cannot return ~a")
51 (value->lily-string m parser))
53 (and (pair? (car sig)) (cdar sig))))
55 ;; Music function: Apply function and check return value.
56 ;; args are in reverse order, rest may specify additional ones
58 ;; If args is not a proper list, an error has been flagged earlier
59 ;; and no fallback value had been available. In this case,
60 ;; we don't call the function but rather return the general
62 (define-ly-syntax (music-function parser loc fun args . rest)
63 (let* ((sig (ly:music-function-signature fun))
64 (pred (if (pair? (car sig)) (caar sig) (car sig)))
65 (good (proper-list? args))
66 (m (and good (with-fluids ((%parser parser) (%location loc))
67 (apply (ly:music-function-extract fun)
68 (reverse! args rest))))))
69 (if (and good (pred m))
72 (set! (ly:music-property m 'origin) loc))
75 (music-function-call-error parser loc fun m)
76 (and (pair? (car sig)) (cdar sig))))))
78 (define-ly-syntax (argument-error parser location n pred arg)
82 (_ "wrong type for argument ~a. Expecting ~a, found ~s")
83 n (type-name pred) (music->make-music arg))
86 (define-ly-syntax-simple (void-music)
89 (define-ly-syntax-simple (sequential-music mlist)
90 (make-sequential-music mlist))
92 (define-ly-syntax-simple (simultaneous-music mlist)
93 (make-simultaneous-music mlist))
95 (define-ly-syntax-simple (event-chord mlist)
96 (make-music 'EventChord
99 (define-ly-syntax-simple (unrelativable-music mus)
100 (make-music 'UnrelativableMusic
103 (define-ly-syntax-simple (context-change type id)
104 (make-music 'ContextChange
108 (define-ly-syntax (tempo parser location text . rest)
109 (let* ((unit (and (pair? rest)
113 (range-tempo? (pair? count))
114 (tempo-change (make-music 'TempoChangeEvent
118 'metronome-count count))
122 (make-property-set 'tempoWholesPerMinute
126 (round (/ (+ (car count) (cdr count))
130 (ly:duration-length unit)))
134 (make-sequential-music (list tempo-change tempo-set))
137 (define-ly-syntax-simple (repeat type num body alts)
138 (make-repeat type num body alts))
140 (define (script-to-mmrest-text music)
141 "Extract @code{'direction} and @code{'text} from @var{music}, and transform
142 into a @code{MultiMeasureTextEvent}."
144 (if (music-is-of-type? music 'script-event)
145 (make-music 'MultiMeasureTextEvent music)
148 (define-ly-syntax (multi-measure-rest parser location duration articulations)
149 (make-music 'MultiMeasureRestMusic
150 'articulations (map script-to-mmrest-text articulations)
154 (define-ly-syntax (repetition-chord parser location duration articulations)
155 (make-music 'EventChord
157 'elements articulations
160 (define-ly-syntax-simple (context-specification type id ops create-new mus)
161 (let ((csm (context-spec-music mus type id)))
162 (set! (ly:music-property csm 'property-operations) ops)
163 (if create-new (set! (ly:music-property csm 'create-new) #t))
166 (define-ly-syntax (composed-markup-list parser location commands markups)
167 ;; `markups' being a list of markups, eg (markup1 markup2 markup3),
168 ;; and `commands' a list of commands with their scheme arguments, in reverse order,
169 ;; eg: ((italic) (raise 4) (bold)), maps the commands on each markup argument, eg:
170 ;; ((bold (raise 4 (italic markup1)))
171 ;; (bold (raise 4 (italic markup2)))
172 ;; (bold (raise 4 (italic markup3))))
174 (define (compose arg)
176 (lambda (cmd prev) (append cmd (list prev)))
179 (let loop ((markups markups) (completed '()))
180 (cond ((null? markups) (reverse! completed))
181 ((markup? (car markups))
183 (cons (compose (car markups)) completed)))
186 (lambda () (break! markup? markups))
187 (lambda (complex rest)
190 (make-map-markup-commands-markup-list
191 compose complex) completed))))))))
193 (define-ly-syntax (property-operation parser location ctx music-type symbol . args)
194 (let* ((props (case music-type
195 ((PropertySet) (list 'value (car args)))
196 ((PropertyUnset) '())
197 ((OverrideProperty) (list 'grob-value (car args)
198 'grob-property-path (if (list? (cadr args))
203 (if (list? (car args))
204 (list 'grob-property-path (car args))
205 (list 'grob-property-path args)))
206 (else (ly:error (_ "Invalid property operation ~a") music-type))))
207 (m (apply make-music music-type
211 (make-music 'ContextSpeccedMusic
216 (define (get-first-context-id! mus)
217 "Find the name of a ContextSpeccedMusic, possibly naming it"
218 (let ((id (ly:music-property mus 'context-id)))
219 (if (eq? (ly:music-property mus 'name) 'ContextSpeccedMusic)
220 (if (and (string? id)
221 (not (string-null? id)))
223 ;; We may reliably give a new context a unique name, but
224 ;; not an existing one
225 (if (ly:music-property mus 'create-new #f)
226 (let ((id (get-next-unique-voice-name)))
227 (set! (ly:music-property mus 'context-id) id)
232 (define unique-counter -1)
233 (define (get-next-unique-voice-name)
234 (set! unique-counter (1+ unique-counter))
235 (call-with-output-string (lambda (p) (format p "uniqueContext~s" unique-counter))))
237 (define-ly-syntax-simple (lyric-event text duration)
238 (make-lyric-event text duration))
240 (define (lyric-combine-music sync sync-type music loc)
241 ;; CompletizeExtenderEvent is added following the last lyric in MUSIC
242 ;; to signal to the Extender_engraver that any pending extender should
243 ;; be completed if the lyrics end before the associated voice.
244 (append! (ly:music-property music 'elements)
245 (list (make-music 'CompletizeExtenderEvent)))
246 (make-music 'LyricCombineMusic
248 'associated-context sync
249 'associated-context-type sync-type
252 (define-ly-syntax (lyric-combine parser location voice typ music)
253 (lyric-combine-music voice typ music location))
255 (define-ly-syntax (add-lyrics parser location music addlyrics-list)
256 (let* ((existing-voice-name (get-first-context-id! music))
257 (voice-name (if (string? existing-voice-name)
259 (get-next-unique-voice-name)))
260 (voice (if (string? existing-voice-name)
262 (make-music 'ContextSpeccedMusic
265 'context-id voice-name
266 'origin (ly:music-property music 'origin))))
267 (voice-type (ly:music-property voice 'context-type))
268 (lyricstos (map (lambda (mus)
269 (let* ((loc (ly:music-property mus 'origin))
270 (lyr (lyric-combine-music
271 voice-name voice-type mus loc)))
272 (make-music 'ContextSpeccedMusic
274 'context-type 'Lyrics
278 (make-simultaneous-music (cons voice lyricstos))))