X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fparser-clef.scm;h=8275929d554e2124e8f91b4c14e7330b94b7df56;hb=f252b3715f8468ed735dda56269aaf3e712d4606;hp=b3de9fc405876ce6fe7212b2e3d158210cded146;hpb=a9d9433bc7b95cb2d4b3d96eefce7a8437c0d44e;p=lilypond.git

diff --git a/scm/parser-clef.scm b/scm/parser-clef.scm
index b3de9fc405..8275929d55 100644
--- a/scm/parser-clef.scm
+++ b/scm/parser-clef.scm
@@ -1,4 +1,4 @@
-;;;; clef.scm -- Clef settings
+;;;; parser-clef.scm -- Clef settings
 ;;;;
 ;;;; source file of the GNU LilyPond music typesetter
 ;;;;
@@ -109,15 +109,15 @@
 	  (set! oct
 		(* (if (equal? (match:substring match 2) "^") -1 1)
 		   (- (string->number (match:substring match 3)) 1)))))
-    (set! e (assoc clef-name supported-clefs))
-    (if (pair? e)
+    (set! e (assoc-get clef-name supported-clefs))
+    (if e
 	(let* ((musics (map make-prop-set
-			    `(((symbol . clefGlyph) (value . ,(cadr e)))
+			    `(((symbol . clefGlyph) (value . ,(car e)))
 			      ((symbol . middleCClefPosition)
 			       (value . ,(+ oct
-					    (caddr e)
-					    (cdr (assoc (cadr e) c0-pitch-alist)))))
-			      ((symbol . clefPosition) (value . ,(caddr e)))
+					    (cadr e)
+					    (assoc-get (car e) c0-pitch-alist))))
+			      ((symbol . clefPosition) (value . ,(cadr e)))
 			      ((symbol . clefOctavation) (value . ,(- oct))))))
 	       (recalc-mid-C (make-music 'ApplyContext))
 	       (seq (make-music 'SequentialMusic
@@ -132,3 +132,10 @@
 		       (sort (map car supported-clefs) string<?)))
 	  (make-music 'Music)))))
 
+;; a function to add new clefs at runtime
+(define-public (add-new-clef clef-name clef-glyph clef-position octavation c0-position)
+  "Append the entries for a clef symbol to supported clefs and c0-pitch-alist"
+  (set! supported-clefs
+        (acons clef-name (list clef-glyph clef-position octavation) supported-clefs))
+  (set! c0-pitch-alist
+        (acons clef-glyph c0-position c0-pitch-alist)))