X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=ly%2Fcontext-mods-init.ly;h=a4064f4b327a4df15bef871dff36d801efe50d2d;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=e8b96025773683aab20fbf3e2d4f42b914105e5b;hpb=c054eb280fd9953596eb164f67b0f9d5555c5a32;p=lilypond.git

diff --git a/ly/context-mods-init.ly b/ly/context-mods-init.ly
index e8b9602577..a4064f4b32 100644
--- a/ly/context-mods-init.ly
+++ b/ly/context-mods-init.ly
@@ -23,3 +23,34 @@ RemoveEmptyStaves = \with {
   \description "Remove staves which are considered to be empty according
 to the list of interfaces set by @code{keepAliveInterfaces}."
 }
+
+RemoveAllEmptyStaves = \with {
+  \override VerticalAxisGroup.remove-empty = ##t
+  \override VerticalAxisGroup.remove-first = ##t
+  \description "Remove staves which are considered to be empty according
+to the list of interfaces set by @code{keepAliveInterfaces}, including those
+in the first system."
+}
+
+inherit-acceptability =
+#(define-void-function (to from)
+   (symbol? symbol?)
+   (_i "When used in an output definition, will modify all context
+definitions such that context @var{to} is accepted as a child by all
+contexts that also accept @var{from}.")
+   (let* ((module (current-module))
+	  (cmod (ly:make-context-mod)))
+     (ly:add-context-mod cmod (list 'accepts to))
+     (if (output-module? module)
+	 (module-map
+	  (lambda (_sym var)
+	    (if (variable-bound? var)
+		(let ((cdef (variable-ref var)))
+		  (if (ly:context-def? cdef)
+		      (let ((accepts (ly:context-def-lookup cdef 'accepts)))
+			(if (and (memq from accepts)
+				 (not (memq to accepts)))
+			    (variable-set! var
+					   (ly:context-def-modify cdef cmod))))))))
+	  module)
+	 (ly:parser-error (_ "Not in an output definition")))))