#(define-music-function (parser location proc mus) (procedure? ly:music?)
(music-map proc mus))
+overrideBeamSettings =
+#(define-music-function
+ (parser location
+ context time-signature rule-type grouping-rule)
+ (symbol? pair? symbol? pair?)
+
+ (_i "Override beamSettings in @var{context}
+for time signatures of @var{time-signature} and rules of type
+@var{rule-type} to have a grouping rule alist
+@var{grouping-rule}.
+@var{rule-type} can be @code{end} or @code{subdivide},
+with a potential future value of @code{begin}.
+@var{grouping-rule} is an alist of @var{(beam-type . grouping)}
+entries. @var{grouping} is in units of @var{beam-type}. If
+@var{beam-type} is @code{*}, grouping is in units of the denominator
+of @var{time-signature}.")
+
+ ;; TODO -- add warning if largest value of grouping is
+ ;; greater than time-signature.
+
+#{
+#(override-beam-setting
+ $time-signature $rule-type $grouping-rule $context)
+#})
overrideProperty =
#(define-music-function (parser location name property value)
reference-note))
+revertBeamSettings =
+#(define-music-function
+ (parser location
+ context time-signature rule-type)
+ (symbol? pair? symbol?)
+
+ (_i "Revert beam settings in @var{context} for time signatures of
+@var{time-signature} and groups of type
+@var{group-type}. @var{group-type} can be @code{end}
+or @code{subdivide}.")
+#{
+ #(revert-beam-setting $time-signature $rule-type $context)
+#})
scaleDurations =
#(define-music-function (parser location fraction music) (number-pair? ly:music?)
(ly:music-compress music
(ly:make-moment (car fraction) (cdr fraction))))
+setBeatGrouping =
+#(define-music-function (parser location grouping) (pair?)
+ (_i "Set the beat grouping in the current time signature to
+@var{grouping}.")
+ (define (default-group-setting c)
+ (let* ((context-time-signature
+ (ly:context-property c 'timeSignatureFraction))
+ (time-signature (if (null? context-time-signature)
+ '(4 . 4)
+ context-time-signature)))
+ (override-property-setting
+ c
+ 'beamSettings
+ (list time-signature 'end)
+ (list (cons '* grouping)))))
+
+ (context-spec-music
+ (make-apply-context default-group-setting)
+ 'Score))
shiftDurations =