;;;;
;;;; (c) 2006 Erik Sandberg <mandolaerik@gmail.com>
-;; TODO: use separate module for syntax
-;; constructors. Also create wrapper around the constructor?
+;; TODO: use separate module for parser.
(define define-ly-syntax define-public)
-;; A ly-syntax constructor takes two extra parameters, parser and
-;; location. These are mainly used for reporting errors and
-;; warnings. This function is a syntactic sugar which uses the
-;; location arg to set the origin of the returned music object; this
-;; behaviour is usually desired
+;; This shorthand adds a location parameter, and uses it to set the
+;; origin. It can be used for most music functions.
(defmacro define-ly-syntax-loc (args . body)
- (primitive-eval `(define-ly-syntax ,args
- (let ((m ,(cons 'begin body)))
- (set! (ly:music-property m 'origin) ,(third args))
- m))))
-
-;; Like define-ly-syntax-loc, but adds parser and location
-;; parameters. Useful for simple constructors that don't need to
-;; report errors.
-(defmacro define-ly-syntax-simple (args . body)
- (primitive-eval `(define-ly-syntax ,(cons* (car args)
- 'parser
- 'location
- (cdr args))
- (let ((m ,(cons 'begin body)))
+ (primitive-eval `(define-ly-syntax ,(cons* (car args) 'location (cdr args))
+ (let ((m ((lambda ,(cdr args) . ,body) . ,(cdr args))))
(set! (ly:music-property m 'origin) location)
m))))
-;; Music function: Apply function and check return value.
-(define-ly-syntax-loc (music-function parser loc fun args)
- (let ((m (apply fun (cons* parser loc args))))
- (if (ly:music? m)
- m
- (begin
- (ly:parser-error parser (_ "Music head function must return Music object") loc)
- (make-music 'Music)))))
-
-(define-ly-syntax-simple (void-music)
- (make-music 'Music))
-
-(define-ly-syntax-simple (sequential-music mlist)
+(define-ly-syntax-loc (sequential-music mlist)
(make-sequential-music mlist))
-(define-ly-syntax-simple (simultaneous-music mlist)
+(define-ly-syntax-loc (simultaneous-music mlist)
(make-simultaneous-music mlist))
-(define-ly-syntax-simple (event-chord mlist)
- (make-music 'EventChord
- 'elements mlist))
-
-(define-ly-syntax-simple (unrelativable-music mus)
- (make-music 'UnrelativableMusic
- 'element mus))
-
-(define-ly-syntax-simple (context-change type id)
- (make-music 'ContextChange
- 'change-to-type type
- 'change-to-id id))
-
-(define-ly-syntax-simple (voice-separator)
- (make-music 'VoiceSeparator))
-
-(define-ly-syntax-simple (bar-check)
- (make-music 'BarCheck))
-
-(define-ly-syntax-simple (time-scaled-music fraction music)
- (make-music 'TimeScaledMusic
- 'element (ly:music-compress music (ly:make-moment (car fraction) (cdr fraction)))
- 'numerator (car fraction)
- 'denominator (cdr fraction)))
-
-(define-ly-syntax-simple (transpose-music pitch music)
- (make-music 'TransposedMusic
- 'element (ly:music-transpose music pitch)))
-
-(define-ly-syntax-simple (tempo duration tempo)
- (context-spec-music
- (make-sequential-music
- (list
- (make-property-set 'tempoWholesPerMinute
- (ly:moment-mul (ly:make-moment tempo 1)
- (ly:duration-length duration)))
- (make-property-set 'tempoUnitDuration duration)
- (make-property-set 'tempoUnitCount tempo)))
- 'Score))
-
-(define-ly-syntax-simple (skip-music dur)
- (make-music 'SkipMusic
- 'duration dur))
-
-(define-ly-syntax-simple (repeat type num body alts)
+(define-ly-syntax-loc (repeat type num body alts)
(make-repeat type num body alts))
-
-(define (script-to-mmrest-text music)
- "Extract 'direction and 'text from SCRIPT-MUSIC, and transform MultiMeasureTextEvent"
- (if (memq 'script-event (ly:music-property music 'types))
-
- (let ((dir (ly:music-property music 'direction))
- (p (make-music 'MultiMeasureTextEvent
- 'text (ly:music-property music 'text))))
- (if (ly:dir? dir)
- (set! (ly:music-property p 'direction) dir))
- p)
- music))
-
-(define-ly-syntax (multi-measure-rest parser location duration articulations)
- (make-music 'MultiMeasureRestMusic
- 'articulations (map script-to-mmrest-text articulations)
- 'duration duration
- 'origin location))
-
-(define-ly-syntax-simple (context-specification type id mus ops create-new)
- (let* ((type-sym (if (symbol? type) type (string->symbol type)))
- (csm (context-spec-music mus type-sym id)))
- (set! (ly:music-property csm 'property-operations) ops)
- (if create-new (set! (ly:music-property csm 'create-new) #t))
- csm))
-
-(define-ly-syntax (property-operation parser location once ctx music-type symbol . args)
- (let* ((props (case music-type
- ((PropertySet) (list 'value (car args)))
- ((PropertyUnset) '())
- ((OverrideProperty) (list 'grob-value (car args)
- 'grob-property-path (cdr args)
- 'pop-first #t))
- ((RevertProperty) (list 'grob-property-path args))
- (else (ly:error (_ "Invalid property operation ~a") music-type))))
- (oprops (if once (cons* 'once once props) props))
- (m (apply make-music music-type
- 'symbol symbol
- 'origin location
- oprops)))
- (make-music 'ContextSpeccedMusic
- 'element m
- 'context-type ctx
- 'origin location)))
-
-;; TODO: It seems that this function rarely returns anything useful.
-(define (get-first-context-id type mus)
- "Find the name of a ContextSpeccedMusic with given type"
- (let ((id (ly:music-property mus 'context-id)))
- (if (and (eq? (ly:music-property mus 'type) 'ContextSpeccedMusic)
- (eq? (ly:music-property mus 'context-type) type)
- (string? id)
- (not (string-null? id)))
- id
- '())))
-
-(define unique-counter -1)
-(define (get-next-unique-voice-name)
- (set! unique-counter (1+ unique-counter))
- (call-with-output-string (lambda (p) (format p "uniqueContext~s" unique-counter))))
-
-(define (lyric-combine-music sync music loc)
- (make-music 'LyricCombineMusic
- 'element music
- 'associated-context sync
- 'origin loc))
-
-(define-ly-syntax (lyric-combine parser location voice music)
- (lyric-combine-music voice music location))
-
-(define-ly-syntax (add-lyrics parser location music addlyrics-list)
- (let* ((existing-voice-name (get-first-context-id 'Voice music))
- (voice-name (if (string? existing-voice-name)
- existing-voice-name
- (get-next-unique-voice-name)))
- (voice (if (string? existing-voice-name)
- (music)
- (make-music 'ContextSpeccedMusic
- 'element music
- 'context-type 'Voice
- 'context-id voice-name
- 'origin (ly:music-property music 'origin))))
- (lyricstos (map (lambda (mus)
- (let* ((loc (ly:music-property mus 'origin))
- (lyr (lyric-combine-music voice-name mus loc)))
- (make-music 'ContextSpeccedMusic
- 'create-new #t
- 'context-type 'Lyrics
- 'element lyr
- 'origin loc)))
- addlyrics-list)))
- (make-simultaneous-music (cons voice lyricstos))))
projects / lilypond.git / blobdiff