X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer-scheme.cc;h=d58f5a50438967aea763bf80c13d8f7f3df1d4bf;hb=5b4b0d6e9a197e8f9eb085b7c2ad78b8be3e5cfc;hp=da8491e8fa277b3ccb1dcb5d918823bc608566aa;hpb=7e33691750a97e1b66192cb484f479a173390132;p=lilypond.git

diff --git a/lily/staff-symbol-referencer-scheme.cc b/lily/staff-symbol-referencer-scheme.cc
index da8491e8fa..d58f5a5043 100644
--- a/lily/staff-symbol-referencer-scheme.cc
+++ b/lily/staff-symbol-referencer-scheme.cc
@@ -3,20 +3,20 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1999--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  (c) 1999--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "grob.hh"
 #include "staff-symbol-referencer.hh"
+#include "staff-symbol.hh"
 #include "libc-extension.hh"
 
 LY_DEFINE (ly_grob_staff_position, "ly:grob-staff-position",
 	   1, 0, 0, (SCM sg),
 	   "Return the Y-position of @var{sg} relative to the staff.")
 {
+  LY_ASSERT_SMOB (Grob, sg, 1);
   Grob *g = unsmob_grob (sg);
-
-  SCM_ASSERT_TYPE (g, sg, SCM_ARG1, __FUNCTION__, "grob");
   Real pos = Staff_symbol_referencer::get_position (g);
 
   if (fabs (rint (pos) -pos) < 1e-6) // ugh.
@@ -24,3 +24,26 @@ LY_DEFINE (ly_grob_staff_position, "ly:grob-staff-position",
   else
     return scm_from_double (pos);
 }
+
+LY_DEFINE (ly_position_on_line_p, "ly:position-on-line?",
+           2, 0, 0, (SCM sg, SCM spos),
+           "Return whether @var{pos} is on a line of the staff associated with the the grob @var{sg} (even on an extender line).")
+{
+  LY_ASSERT_SMOB (Grob, sg, 1);
+  LY_ASSERT_TYPE (scm_is_number, spos, 2);
+  Grob *g = unsmob_grob (sg);
+  Grob *st = Staff_symbol_referencer::get_staff_symbol (g);
+  int pos = scm_to_int (spos);
+  bool on_line = st ? Staff_symbol::on_line (g, pos) : false;
+  return scm_from_bool (on_line);
+}
+
+LY_DEFINE (ly_staff_symbol_line_thickness, "ly:staff-symbol-line-thickness",
+           1, 0, 0, (SCM grob),
+           "Returns the line-thickness of the staff associated with @var{grob}.")
+{
+  LY_ASSERT_SMOB (Grob, grob, 1);
+  Grob *g = unsmob_grob (grob);
+  Real thickness = Staff_symbol_referencer::line_thickness (g);
+  return scm_from_double (thickness);
+}