;; in 3 2 time:
;; end beams each 1 2 note
;; end beams with 16th notes each 1 4 note
- ;; end beams with 32th notes each 1 8 note
+ ;; end beams with 32nd notes each 1 8 note
((end * * 3 2) . ,(ly:make-moment 1 2))
((end * * 3 2) . ,(ly:make-moment 2 2))
-
+
((end 1 16 3 2) . ,(ly:make-moment 1 4))
((end 1 16 3 2) . ,(ly:make-moment 1 2))
((end 1 16 3 2) . ,(ly:make-moment 3 4))
((end 1 16 3 2) . ,(ly:make-moment 5 4))
-
+
((end 1 32 3 2) . ,(ly:make-moment 1 8))
((end 1 32 3 2) . ,(ly:make-moment 1 4))
((end 1 32 3 2) . ,(ly:make-moment 3 8))
((end 1 32 3 2) . ,(ly:make-moment 1 2))
((end 1 32 3 2) . ,(ly:make-moment 5 8))
((end 1 32 3 2) . ,(ly:make-moment 3 4))
+ ((end 1 32 3 2) . ,(ly:make-moment 7 8))
((end 1 32 3 2) . ,(ly:make-moment 9 8))
((end 1 32 3 2) . ,(ly:make-moment 5 4))
((end 1 32 3 2) . ,(ly:make-moment 11 8))
((end 1 16 3 4) . ,(ly:make-moment 1 4))
((end 1 16 3 4) . ,(ly:make-moment 1 2))
-
+
((end 1 32 3 4) . ,(ly:make-moment 1 8))
((end 1 32 3 4) . ,(ly:make-moment 1 4))
((end 1 32 3 4) . ,(ly:make-moment 3 8))
;; in common time:
;; end beams each 1 2 note
- ;; end beams with 32th notes each 1 8 note
+ ;; end beams with 32nd notes each 1 8 note
;; end beams with 1 8 triplets each 1 4 note
((end * * 4 4) . ,(ly:make-moment 1 2))
((end 1 12 4 4) . ,(ly:make-moment 1 4))
((end 1 12 4 4) . ,(ly:make-moment 3 4))
-
+
((end 1 16 4 4) . ,(ly:make-moment 1 4))
((end 1 16 4 4) . ,(ly:make-moment 3 4))
-
+
((end 1 32 4 4) . ,(ly:make-moment 1 8))
((end 1 32 4 4) . ,(ly:make-moment 1 4))
((end 1 32 4 4) . ,(ly:make-moment 3 8))
((end 1 32 4 4) . ,(ly:make-moment 3 4))
((end 1 32 4 4) . ,(ly:make-moment 7 8))
- ((end * * 2 4) . #f) ;; switch-off at-any-beat feature
((end * * 2 4) . ,(ly:make-moment 1 4))
((end 1 32 2 4) . ,(ly:make-moment 1 8))
((end 1 32 2 4) . ,(ly:make-moment 3 8))
- ((end * * 4 8) . #f) ;; switch-off at-any-beat feature
((end * * 4 8) . ,(ly:make-moment 1 4))
((end 1 32 4 8) . ,(ly:make-moment 1 8))
((end 1 32 4 8) . ,(ly:make-moment 3 8))
- ((end * * 4 16) . #f) ;; switch-off at-any-beat feature
((end * * 4 16) . ,(ly:make-moment 1 8))
- ((end * * 6 8) . #f) ;; switch-off at-any-beat feature
- ((end * * 6 8) . ,(ly:make-moment 3 8))
+ ;; in 6 8, 9 8 and 12 8 time:
+ ;; use beatGrouping for all except 1 32nd notes
+ ;; end beams with 32nd notes every 1 8 note
+
((end 1 32 6 8) . ,(ly:make-moment 1 8))
- ((end 1 32 6 8) . ,(ly:make-moment 1 4))
- ((end 1 32 6 8) . ,(ly:make-moment 1 2))
+ ((end 1 32 6 8) . ,(ly:make-moment 2 8))
+ ((end 1 32 6 8) . ,(ly:make-moment 3 8))
+ ((end 1 32 6 8) . ,(ly:make-moment 4 8))
((end 1 32 6 8) . ,(ly:make-moment 5 8))
- ((end * * 9 8) . #f) ;; switch-off at-any-beat feature
- ((end * * 9 8) . ,(ly:make-moment 3 8))
- ((end * * 9 8) . ,(ly:make-moment 3 4))
((end 1 32 9 8) . ,(ly:make-moment 1 8))
- ((end 1 32 9 8) . ,(ly:make-moment 1 4))
- ((end 1 32 9 8) . ,(ly:make-moment 1 2))
+ ((end 1 32 9 8) . ,(ly:make-moment 2 8))
+ ((end 1 32 9 8) . ,(ly:make-moment 3 8))
+ ((end 1 32 9 8) . ,(ly:make-moment 4 8))
((end 1 32 9 8) . ,(ly:make-moment 5 8))
+ ((end 1 32 9 8) . ,(ly:make-moment 6 8))
((end 1 32 9 8) . ,(ly:make-moment 7 8))
- ((end 1 32 9 8) . ,(ly:make-moment 1 1))
- ((end 1 32 9 8) . ,(ly:make-moment 9 8))
-
- ((end * * 12 8) . #f) ;; switch-off at-every-beat
- ((end * * 12 8) . ,(ly:make-moment 3 8))
- ((end * * 12 8) . ,(ly:make-moment 3 4))
- ((end * * 12 8) . ,(ly:make-moment 9 8))
- ((end * * 12 8) . ,(ly:make-moment 2 1))
+ ((end 1 32 9 8) . ,(ly:make-moment 8 8))
+
((end 1 32 12 8) . ,(ly:make-moment 1 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 2 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 3 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 4 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 5 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 6 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 7 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 8 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 9 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 10 8))
+ ((end 1 32 12 8) . ,(ly:make-moment 11 8))
))
(define (override-property-setting context property setting value)
;; 2. end * * *
;; 3. end <type> <num> <den>
;; 4. end * <num> <den>
-;; 5. if 1-4 not specified: begin anywhere, end at every beat
+;; 5. if 1-4 not specified, begin anywhere, end at time determined by
+;; beatGrouping and beatLength:
+;; if beatGrouping and beatLength are consistent with measureLength,
+;; use beatGrouping to determine end of beams.
+;; if beatGrouping and beatLength are inconsistent with measureLength,
+;; use beatLength to determine end of beams.
;;
;; Rationale:
;;
;; 4. exceptions for specific time signature
;; 5. easy catch-all rule for non-specified measure types
+
(define-public (default-auto-beam-check context dir test)
(define (get name default)
(let ((value (ly:context-property context name)))
(if (not (null? value)) value default)))
+ (define (ending-moments group-list start-beat beat-length)
+ (if (null? group-list)
+ '()
+ (let ((new-start (+ start-beat (car group-list))))
+ (cons (ly:moment-mul (ly:make-moment new-start 1) beat-length)
+ (ending-moments (cdr group-list) new-start beat-length)))))
+
+ (define (make-end-settings time ending-list moment-den)
+ (if (null? ending-list)
+ '()
+ (cons (cons (append '(end * *) time)
+ (ly:make-moment (car ending-list) moment-den))
+ (make-end-settings time (cdr ending-list) moment-den))))
+
;; Don't start auto beams on grace notes
(if (and (!= (ly:moment-grace-numerator (ly:context-now context)) 0)
- (= dir START))
+ (= dir START))
#f
- (let* ((beat-length (get 'beatLength (ly:make-moment 1 1)))
- (measure-length (get 'measureLength (ly:make-moment 1 1)))
- (measure-pos (get 'measurePosition ZERO-MOMENT))
- (settings (get 'autoBeamSettings '()))
- (function (list (if (= dir START) 'begin 'end)))
- (num-mom (ly:moment-div measure-length beat-length))
- (num (inexact->exact
- (round (/ (ly:moment-main-numerator num-mom)
- (ly:moment-main-denominator num-mom)))))
- (den (ly:moment-main-denominator beat-length))
- (time (list num den))
- (type (list (ly:moment-main-numerator test)
- (ly:moment-main-denominator test)))
- (pos (if (>= (ly:moment-main-numerator measure-pos) 0)
- measure-pos
- (ly:moment-add measure-length measure-pos)))
- (lst (list
- ;; Hmm, should junk user-override feature,
- ;; or split this in user-override and config section?
- (append function type '(* *))
- (append function '(* * * *))
- (append function type time)
- (append function '(* *) time))))
-
- (if (or
- ;; always begin or end beams at beginning/ending of measure
- (= (ly:moment-main-numerator pos) 0)
- (first-member (map (lambda (x) (cons x pos)) lst) settings))
- #t
- (if (= dir START)
- ;; if no entry matches our function + time or type,
- ;; start anywhere
- (not (first-assoc lst settings))
- ;; if no entry matches our function + time or type,
- ;; end at any beat
- (and (not (first-assoc lst settings))
- (= (ly:moment-main-denominator
- (ly:moment-div pos beat-length)) 1)))))))
+ (let* ((beat-length (get 'beatLength (ly:make-moment 1 4)))
+ (measure-length (get 'measureLength (ly:make-moment 1 1)))
+ (measure-pos (get 'measurePosition ZERO-MOMENT))
+ (beat-grouping (get 'beatGrouping '()))
+ (settings (get 'autoBeamSettings '()))
+ (function (list (if (= dir START) 'begin 'end)))
+ ;; Calculate implied time signature based on measureLength
+ ;; and beatLength for default value in get
+ (num-mom (ly:moment-div measure-length beat-length))
+ (num (inexact->exact
+ (round (/ (ly:moment-main-numerator num-mom)
+ (ly:moment-main-denominator num-mom)))))
+ (den (ly:moment-main-denominator beat-length))
+ (time-signature-fraction
+ (get 'timeSignatureFraction (cons num den)))
+ (time (list (car time-signature-fraction)
+ (cdr time-signature-fraction)))
+ (type (list (ly:moment-main-numerator test)
+ (ly:moment-main-denominator test)))
+ (pos (if (>= (ly:moment-main-numerator measure-pos) 0)
+ measure-pos
+ (ly:moment-add measure-length measure-pos)))
+ (grouping-moments (ending-moments beat-grouping 0 beat-length))
+ ;; Calculate implied measure length from beatGrouping
+ ;; and beatLength
+ (grouping-length (if (null? grouping-moments)
+ ZERO-MOMENT
+ (list-ref grouping-moments
+ (1- (length grouping-moments)))))
+ (lst (list
+ ;; Hmm, should junk user-override feature,
+ ;; or split this in user-override and config section?
+ (append function type '(* *))
+ (append function '(* * * *))
+ (append function type time)
+ (append function '(* *) time)))
+ (predefined-setting (first-assoc lst settings)))
+ (if (or
+ ;; always begin or end beams at beginning/ending of measure
+ (= (ly:moment-main-numerator pos) 0)
+ (first-member (map (lambda (x) (cons x pos)) lst) settings))
+ #t
+ (if (= dir START)
+ ;; if no entry matches our function + time or type,
+ ;; start anywhere
+ (not predefined-setting)
+ ;; if entry matches our function + time or type, check moment
+ (if predefined-setting
+ (equal? measure-pos (cdr predefined-setting))
+ ;; if measure-length matches grouping-length, use
+ ;; grouping moments, else use beat-length
+ (if (equal? measure-length grouping-length)
+ (member measure-pos grouping-moments)
+ (= (ly:moment-main-denominator
+ (ly:moment-div pos beat-length)) 1))))))))
projects / lilypond.git / blobdiff