Docs: Make MG authors list shorter (one line per author) by using @multitable

[lilypond.git] / scm / music-functions.scm

diff --git a/scm/music-functions.scm b/scm/music-functions.scm
index 0344e4bf58fb4599cda7d7a8cf928324ea94fd3f..490cafe92c40c9cc3f3de7ed20b29541353061ea 100644 (file)
--- a/scm/music-functions.scm
+++ b/scm/music-functions.scm
@@ -974,6 +974,23 @@ if appropriate.
          (cons #f (not (or (equal? acc key-acc)
                            (and (equal? entrybn barnum) (equal? entrymp measurepos)))))))))
 
+(define-public (teaching-accidental-rule context pitch barnum measurepos)
+  "an accidental rule that typesets a cautionary accidental
+  if it is included in the key signature AND does not directly follow
+  a note on the same staff-line."
+  (let* ((keysig (ly:context-property context 'localKeySignature))
+        (entry (find-pitch-entry keysig pitch #t #t)))
+    (if (equal? #f entry)
+       (cons #f #f)
+       (let* ((global-entry (find-pitch-entry keysig pitch #f #f))
+              (key-acc (if (equal? global-entry #f)
+                           0
+                           (key-entry-alteration global-entry)))
+              (acc (ly:pitch-alteration pitch))
+              (entrymp (key-entry-measure-position entry))
+              (entrybn (key-entry-bar-number entry)))
+         (cons #f (not (or (equal? acc key-acc)
+                           (and (equal? entrybn barnum) (equal? entrymp measurepos)))))))))
 
 (define-public (set-accidentals-properties extra-natural
                                           auto-accs auto-cauts
@@ -1095,6 +1112,15 @@ use GrandStaff as a context. "
                                           ,(make-accidental-rule 'any-octave 0)
                                           ,(make-accidental-rule 'same-octave 1))
                                   pcontext))
+
+      ;; same as modern, but cautionary accidentals are printed for all sharp or flat
+      ;; tones specified by the key signature.  
+       ((equal? style 'teaching)
+       (set-accidentals-properties #f
+                                   `(Staff ,(make-accidental-rule 'same-octave 0))
+                                   `(Staff ,(make-accidental-rule 'same-octave 1)
+                                          ,teaching-accidental-rule)
+                                  context))
       
       ;; do not set localKeySignature when a note alterated differently from
       ;; localKeySignature is found.