-
-;;; als aan echte stok
-;;; if ((note_column_drul[d] == get_bound (d))
-;;; && note_column_drul[d]->first_head ()
-;;; && (note_column_drul[d]->stem_l ()))
-;;;
-;;; *Need: Score_elment::pointer_alist_
-;;; Score_elment::property_alist_
-;;; Spanner::Drul_array<Item*> spanned_drul_;
-;;; spanner:: (cons get_bound (LEFT) get_bound (RIGHT))
+;;;;
+;;;; slur.scm -- Slur scheme stuff
+;;;;
+;;;; source file of the GNU LilyPond music typesetter
+;;;;
+;;;; (c) 2000--2001 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;;
(define (attached-to-stem slur dir)
- (let* ((note-columns (get-pointer slur 'note-columns))
+ (let* ((note-columns (ly-get-grob-property slur 'note-columns))
(col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
- (stem (get-pointer col 'stem)))
+ (stem (ly-get-grob-property col 'stem)))
(and
- (eq? col (get-bound slur dir))
+ (eq? col (ly-get-spanner-bound slur dir))
stem
- (get-pointer stem 'heads))))
+ (ly-get-grob-property stem 'heads))))
-(define slur-extremity-rules
- '(
- ;;if (stem_l->beam_l () && (stem_l->beam_count (-d) >= 1))
- ((lambda (slur dir)
- ;; urg, code dup
- ;; if attached-to-stem
- (let* ((note-columns (get-pointer slur 'note-columns))
- (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
- (stem (get-pointer col 'stem)))
- (and
- (and
- (eq? col (get-bound slur dir))
- stem
- (get-pointer stem 'heads))
- ;; and got beam
- (and (get-pointer stem 'beam)
- ;; and beam on same side as slur
- (let ((beaming (get-property stem 'beaming)))
- (if (pair? beaming)
- (>= 1
- (if (= dir -1) (car beaming) (cdr beaming)))
- #f)))))) . stem)
- ((lambda (slur dir) (not (attached-to-stem slur dir))) . loose-end)
- ;; default case, attach to head
- ((lambda (x y) #t) . head)
-
- ;; silly rule, just to check
- ((lambda (slur dir)
- (and (attached-to-stem slur dir)
- (= (get-property slur 'direction) dir))) . stem)
- ))
-
-
-(define slur-extremity-offset-alist
+
+;; 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 default-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-grob-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-grob-property slur 'note-columns))
+ (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
+ (stem (ly-get-grob-property col 'stem)))
+ (and stem
+ (not (= (ly-get-grob-property slur 'direction)
+ (ly-get-grob-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-grob-property slur 'note-columns))
+ (col (if (= dir 1) (car note-columns) (car (reverse note-columns))))
+ (stem (ly-get-grob-property col 'stem)))
+ (and stem
+ (ly-get-grob-property stem 'beam)
+ ;; and beam on same side as slur
+ (let ((beaming (ly-get-grob-property stem 'beaming)))
+ ;; (display "beaming (") (display dir) (display "): ") (write beaming) (newline)
+ (if (pair? beaming)
+ (>= (length (if (= dir -1) (cdr beaming) (car beaming)))
+ 1)
+ #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)
+ ))
+
+
+;; This list defines the offsets for each type of attachment.
+;; The format of each element is
+;; (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 default-slur-extremity-offset-alist
'(
- ((head 1 1) . (-0.25 . 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) . (-0.25 . 0.75))
- ((head -1 -1) . (-0.75 . 1.2))
- ((stem 1 1) . (0 . 0.2))
- ((stem -1 -1) . (0 . 0.2))
+ ((head -1 -1) . (-0.85 . 0.75))
+
+ ((stem 1 1) . (-0.125 . 0.5))
+ ((stem -1 -1) . (-0.125 . 0.5))
+
+ ((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))
+ ))
+
+;; 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))
))
+
+
projects / lilypond.git / blobdiff