+;;;;
+;;;; slur.scm -- Slur scheme stuff
+;;;;
+;;;; source file of the GNU LilyPond music typesetter
+;;;;
+;;;; (c) 2000--2004 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;;
(define (attached-to-stem slur dir)
- (let* ((note-columns (ly-get-elt-property slur 'note-columns))
- (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
- (stem (ly-get-elt-property col 'stem)))
+ (let* ((note-columns (ly:grob-property slur 'note-columns))
+ (col (if (= dir 1) (car note-columns) (car (last-pair note-columns))))
+ (stem (ly:grob-property col 'stem)))
(and
- (eq? col (ly-get-spanner-bound slur dir))
- stem
- (ly-get-elt-property stem 'heads))))
+ (eq? col (ly:spanner-get-bound slur dir))
+ (ly:grob? stem)
+ (ly:grob-property stem 'heads))))
-;; Slur-extremity-rules is a list of rules. Each rule is a pair
-;; (fuction . attachment), where function takes two arguments,
-;; the slur and the direction of the attachment.
-;;
-;; The rules are tried starting from the car of this list. If the
-;; function part (car) evaluates to #t, the corresponding
-;; attachment (cdr) is used for the slur's dir. Otherwise, the next
-;; rule is tried.
;;
;; Currently, we have attachments:
;;
;; 'head 'along-side-stem 'stem 'loose-end
;;
-
-(define slur-extremity-rules
- (list
-
- ;; (cons (lambda (slur dir) (begin (display "before sanity check") (newline))#f) #f)
-
- ;; urg: don't crash on a slur without note-columns
- (cons (lambda (slur dir)
- (< (length (ly-get-elt-property slur 'note-columns)) 1)) 'head)
-
- ;; (cons (lambda (slur dir) (begin (display "before loose-end") (newline))#f) #f)
- (cons (lambda (slur dir) (not (attached-to-stem slur dir))) 'loose-end)
-
- ;; (cons (lambda (slur dir) (begin (display "before head") (newline))#f) #f)
-
- (cons (lambda (slur dir)
- ;; urg, code dup
- (let* ((note-columns (ly-get-elt-property slur 'note-columns))
- (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
- (stem (ly-get-elt-property col 'stem)))
- (and stem
- (not (= (ly-get-elt-property slur 'direction)
- (ly-get-elt-property stem 'direction)))))) 'head)
-
- ;; (cons (lambda (slur dir) (begin (display "before stem") (newline))#f) #f)
-
- (cons (lambda (slur dir)
- ;; if attached-to-stem
- (and (attached-to-stem slur dir)
- ;; and got beam
- ;; urg, code dup
- (let* ((note-columns (ly-get-elt-property slur 'note-columns))
- (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
- (stem (ly-get-elt-property col 'stem)))
- (and stem
- (ly-get-elt-property stem 'beam)
- ;; and beam on same side as slur
- (let ((beaming (ly-get-elt-property stem 'beaming)))
- (if (pair? beaming)
- (<= 1
- (if (= dir -1) (car beaming) (cdr beaming)))
- #f))))))
- 'stem)
-
- ;;(cons (lambda (slur dir) (begin (display "before loose-end") (newline))#f) #f)
- (cons (lambda (slur dir) (not (attached-to-stem slur dir))) 'loose-end)
- ;; (cons (lambda (slur dir) (begin (display "after loose-end") (newline))#f) #f)
-
- ;; default case, attach to head
- (cons (lambda (x y) #t) 'head)
+(define (calc-slur-extremity slur dir)
+ (let* ((note-columns (ly:grob-property slur 'note-columns))
+ (col (car (if (= dir 1) note-columns (reverse note-columns))))
+ (stem (ly:grob-property col 'stem)))
+
+
+ (cond
+ ((< (length note-columns) 1) 'head)
+ ((not (attached-to-stem slur dir)) 'loose-end)
+ ((and stem
+ (not (equal? (ly:grob-property slur 'direction)
+ (ly:grob-property stem 'direction)))) 'head)
+ ((and (attached-to-stem slur dir)
+ (ly:grob? stem)
+ (ly:grob? (ly:grob-property stem 'beam))
+ ;; and beam on same side as slur
+ (equal?
+ (ly:grob-property stem 'direction)
+ (ly:grob-property slur 'direction)))
+ 'stem)
+ ((not (attached-to-stem slur dir)) 'loose-end)
+ (else 'head))
))
;; This list defines the offsets for each type of attachment.
;; The format of each element is
-;; (attachment stem-dir * attachment-dir slur-dir)
+;; (attachment stem-dir*dir slur-dir*dir)
;; Different attachments have different default points:
;;
;; head: Default position is centered in X, on outer side of head Y
;; along-side-stem: Default position is on stem X, on outer side of head Y
;; stem: Default position is on stem X, at stem end Y
-(define slur-extremity-offset-alist
+(define default-slur-extremity-offset-alist
'(
- ((head 1 1) . (-0.25 . 0.2))
- ((head 1 -1) . (-0.25 . -0.25))
- ((head -1 1) . (-0.25 . 0.25))
- ((head -1 -1) . (-0.85 . -0.2))
+ ((head 1 1) . (-0.25 . 0.75))
+ ((head 1 -1) . (-0.25 . 0.75))
+ ((head -1 1) . (-0.25 . 0.75))
+ ((head -1 -1) . (-0.85 . 0.75))
- ((stem 1 1) . (0 . 0.5))
- ((stem -1 -1) . (0 . -0.5))
+ ((stem 1 1) . (-0.125 . 0.5))
+ ((stem -1 -1) . (-0.125 . 0.5))
- ((loose-end -1 1) . (-4 . 0))
+ ((loose-end 1 1) . (-0.4 . 0))
+ ((loose-end 1 -1) . (-0.4 . 0))
((loose-end -1 -1) . (-4 . 0))
+ ((loose-end -1 1) . (-4 . 0))
+ ))
+
+;; This is a bit of a hack: slurs and phrasing slurs
+;; attaching at the same note must not collide.
+;; However, slurs (and phrasing slurs) should look
+;; at scripts and eachother.
+(define default-phrasing-slur-extremity-offset-alist
+ '(
+ ((head 1 1) . (-0.25 . 1.25))
+ ((head 1 -1) . (-0.25 . 1.25))
+ ((head -1 1) . (-0.25 . 1.25))
+ ((head -1 -1) . (-0.85 . 1.25))
+
+ ((stem 1 1) . (-0.25 . 1.5))
+ ((stem -1 -1) . (-0.25 . 1.5))
+
((loose-end 1 1) . (-0.4 . 0))
((loose-end 1 -1) . (-0.4 . 0))
+ ((loose-end -1 -1) . (-4 . 0))
+ ((loose-end -1 1) . (-4 . 0))
))
+
+
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