X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fmusic-wrapper.cc;h=968c4447a7ab8c4f06129b2111e670f7a9968fc3;hb=9f54b1d5cd8d05a70e6043e6e26c12aaad75c945;hp=0a1650f991015660b3f4c4bb1a5446034ccb6cdb;hpb=4034396f1e07d5453d81103532bcc2969e131b92;p=lilypond.git

diff --git a/lily/music-wrapper.cc b/lily/music-wrapper.cc
index 0a1650f991..968c4447a7 100644
--- a/lily/music-wrapper.cc
+++ b/lily/music-wrapper.cc
@@ -1,47 +1,36 @@
-/*   
-  music-wrapper.cc --  implement Music_wrapper
-  
+/*
+  music-wrapper.cc -- implement Music_wrapper
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+
+  (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
 
 #include "music-wrapper.hh"
 
-Music_wrapper::Music_wrapper (SCM x)
-  : Music (x)
-{
-  if (!ly_c_procedure_p (length_callback_))
-    length_callback_ = length_callback_proc; 
-  if (!ly_c_procedure_p (start_callback_))
-    start_callback_ = length_callback_proc; 
-}
+#include "music.hh"
 
-MAKE_SCHEME_CALLBACK(Music_wrapper,start_callback,1);
+MAKE_SCHEME_CALLBACK (Music_wrapper, start_callback, 1);
 SCM
 Music_wrapper::start_callback (SCM m)
 {
   Music *me = unsmob_music (m);
   Music *elt = unsmob_music (me->get_property ("element"));
-  return elt->start_mom ().smobbed_copy ();
+  if (elt)
+    return elt->start_mom ().smobbed_copy ();
+  else
+    return Moment ().smobbed_copy ();
 }
 
-MAKE_SCHEME_CALLBACK(Music_wrapper,length_callback,1);
+MAKE_SCHEME_CALLBACK (Music_wrapper, length_callback, 1);
 SCM
 Music_wrapper::length_callback (SCM m)
 {
-  Music * me = unsmob_music (m);
+  Music *me = unsmob_music (m);
   Music *elt = unsmob_music (me->get_property ("element"));
-  return elt->get_length ().smobbed_copy ();
+  if (elt)
+    return elt->get_length ().smobbed_copy ();
+  else
+    return Moment (0).smobbed_copy ();
 }
 
-Music*
-Music_wrapper::element () const
-{
-  return unsmob_music (get_property ("element"));
-}
-
-
-ADD_MUSIC (Music_wrapper);
-