Release: bump Welcome versions.

[lilypond.git] / ly / chord-repetition-init.ly

diff --git a/ly/chord-repetition-init.ly b/ly/chord-repetition-init.ly
index 3ff4578b60da24402d4d2173809a831b87f3c358..1e3c7ad1056dab7c36c7dca5f63c3040f01aa8c0 100644 (file)
--- a/ly/chord-repetition-init.ly
+++ b/ly/chord-repetition-init.ly
@@ -1,34 +1,41 @@
-\version "2.13.8"
+%%% -*- Mode: Scheme -*-
+\version "2.19.22"
 %{
-Two functions define the chord repetition behavior, and may
-be invoked by the user to customize it.
+  Chord repetition behavior is not customizable in the parser.  That
+  is due to it usually being done by the toplevel music handler
+  affecting every bit of music at the same time, not closely related
+  to music input.  Customized behavior is instead accomplished by
+  calling \chordRepeats explicitly on some music list with a list of
+  event types you wish to keep by default (if any events of that kind
+  are found already on the repeat chord, however, they still get
+  removed from the original).
 
-ly:parser-set-repetition-symbol
-  set the chord repetition shortcut.
-  `q' is the default value set in this file.
-
-ly:parser-set-repetition-function
-  set the function that is invoked when a chord repetition symbol
-  is encountered by the parser: a three argument function
-  (previous-chord, duration, list of articulations) which is supposed
-  to return a new chord.
-  `default-repeat-chord' is the default function set in this file.
+  The default behavior is straightforward: don't keep anything but the
+  rhythmic events themselves.
 %}
 
-#(define-public (default-repeat-chord previous-chord duration articulations)
-   "Copy the previous chord, filter out events which are not notes, set the
-chord duration, add articulations."
-   (let ((new-chord (ly:music-deep-copy previous-chord)))
-     (set! (ly:music-property new-chord 'elements)
-           (append! articulations
-                    (filter (lambda (event)
-                              (eqv? (ly:music-property event 'name) 'NoteEvent))
-                            (ly:music-property new-chord 'elements))))
-     (for-each (lambda (event)
-                 (if (ly:duration? (ly:music-property event 'duration))
-                     (set! (ly:music-property event 'duration) duration)))
-               (ly:music-property new-chord 'elements))
-    new-chord))
+chordRepeats =
+#(define-music-function (event-types music)
+   ((list? '()) ly:music?)
+   "Walk through @var{music} putting the notes of the previous chord
+into repeat chords, as well as an optional list of @var{event-types}
+such as @code{#'(string-number-event)}."
+   (expand-repeat-chords! (cons 'rhythmic-event event-types) music))
+
+tabChordRepeats =
+#(define-music-function (event-types music)
+   ((list? '()) ly:music?)
+   "Walk through @var{music} putting the notes, fingerings and string
+numbers of the previous chord into repeat chords, as well as an
+optional list of @var{event-types} such as @code{#'(articulation-event)}."
+   #{ \chordRepeats
+      #(append '(string-number-event fingering-event) event-types)
+      #music
+   #})
 
-#(ly:parser-set-repetition-symbol parser 'q)
-#(ly:parser-set-repetition-function parser default-repeat-chord)
+tabChordRepetition =
+#(define-void-function () ()
+   (_i "Include the string and fingering information in a chord repetition.
+This function is deprecated; try using @code{\\tabChordRepeats} instead.")
+   (ly:parser-define! '$chord-repeat-events
+                      '(string-number-event fingering-event)))