X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Frest.cc;h=22420f54f4def9528dbccb739288d5ca8ade0727;hb=0a08e87869663425d8f5bcaef4197c3bae1b2de5;hp=1e15144839167141867820384a67d371211833d6;hpb=f9214bac21e9926dc3248416f58190c98c4167a9;p=lilypond.git

diff --git a/lily/rest.cc b/lily/rest.cc
index 1e15144839..22420f54f4 100644
--- a/lily/rest.cc
+++ b/lily/rest.cc
@@ -46,6 +46,22 @@ Rest::y_offset_callback (SCM smob)
   return scm_from_double (amount);
 }
 
+/* A rest might lie under a beam, in which case it should be cross-staff if
+   the beam is cross-staff because the rest's position depends on the
+   formatting of the beam. */
+MAKE_SCHEME_CALLBACK (Rest, calc_cross_staff, 1);
+SCM
+Rest::calc_cross_staff (SCM smob)
+{
+  Grob *me = unsmob_grob (smob);
+  Grob *stem = unsmob_grob (me->get_object ("stem"));
+
+  if (!stem)
+    return SCM_BOOL_F;
+
+  return stem->get_property ("cross-staff");
+}
+
 /*
   make this function easily usable in C++
 */
@@ -188,10 +204,11 @@ Rest::pure_height (SCM smob, SCM start, SCM end)
 }
 
 ADD_INTERFACE (Rest,
-	       "A rest symbol.",
+	       "A rest symbol.  The property @code{style} can be"
+	       " @code{default}, @code{mensural}, @code{neomensural} or"
+	       " @code{classical}.",
 
 	       /* properties */
-		  
 	       "direction "
 	       "minimum-distance "
 	       "style "