* lily/spacing-spanner.cc: bound shortest_playing_len by

[lilypond.git] / lily / spacing-engraver.cc

diff --git a/lily/spacing-engraver.cc b/lily/spacing-engraver.cc
index 24e8ab969ae3f718707ad7a6abfe8c96785909f5..e2dbd037a64e07b3dafb6cdcfc6a4dd0e08087c7 100644 (file)
--- a/lily/spacing-engraver.cc
+++ b/lily/spacing-engraver.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -51,7 +51,7 @@ protected:
   virtual void acknowledge_grob (Grob_info);
   virtual void start_translation_timestep ();
   virtual void stop_translation_timestep ();
-  virtual void initialize ();
+  virtual void process_music ();
   virtual void finalize ();
 };
 
@@ -74,20 +74,27 @@ Spacing_engraver::Spacing_engraver ()
 }
 
 void
-Spacing_engraver::initialize ()
+Spacing_engraver::process_music ()
 {
-  spacing_  =new Spanner (get_property ("SpacingSpanner"));
-  spacing_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));  
-  announce_grob(spacing_, SCM_EOL);
+  if (!spacing_)
+    {
+      spacing_ = make_spanner ("SpacingSpanner");
+      spacing_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));  
+      announce_grob(spacing_, SCM_EOL);
+    }
 }
 
 void
 Spacing_engraver::finalize ()
 {
-  Grob * p = unsmob_grob (get_property ("currentCommandColumn"));
-  spacing_->set_bound (RIGHT, p);
-  typeset_grob (spacing_);
-  spacing_ =0;
+  if (spacing_)
+    {
+      Grob * p = unsmob_grob (get_property ("currentCommandColumn"));
+  
+      spacing_->set_bound (RIGHT, p);
+      typeset_grob (spacing_);
+      spacing_ =0;
+    }
 }
 
 void
@@ -98,7 +105,8 @@ Spacing_engraver::acknowledge_grob (Grob_info i)
       Pointer_group_interface::add_grob (spacing_, ly_symbol2scm  ("wishes"), i.grob_);
     }
   
-  if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
+  if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface"))
+      || i.grob_->internal_has_interface (ly_symbol2scm ("multi-measure-event")))
     return;
 
   /*
@@ -123,10 +131,13 @@ Spacing_engraver::stop_translation_timestep ()
   shortest_playing.set_infinite (1);
   for (int i=0; i < playing_durations_.size (); i++)
     {
-      Moment m = (playing_durations_[i].info_.music_cause ())->get_length ();
-      shortest_playing = shortest_playing <? m;
+      Music * mus = playing_durations_[i].info_.music_cause ();
+      if (mus)
+       {
+         Moment m = mus->get_length ();
+         shortest_playing = shortest_playing <? m;
+       }
     }
-  
   Moment starter;
   starter.set_infinite (1);