(process_acknowledged_grobs): new

[lilypond.git] / lily / instrument-name-engraver.cc

diff --git a/lily/instrument-name-engraver.cc b/lily/instrument-name-engraver.cc
index e166f48ec99e1242655a8b815fc5b06f90288bd8..40dcbca8461cdc1a3ef07c8aa6592f41ca8553df 100644 (file)
--- a/lily/instrument-name-engraver.cc
+++ b/lily/instrument-name-engraver.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -15,19 +15,21 @@
 #include "align-interface.hh"
 #include "axis-group-interface.hh"
 #include "translator-group.hh"
+#include "text-item.hh"
 
 class Instrument_name_engraver : public Engraver
 {
   Item *text_;
   Grob *delim_ ;
   
-  void create_text (SCM s);
+  void create_text ();
 public:
   TRANSLATOR_DECLARATIONS(Instrument_name_engraver);
 
   virtual void initialize ();
   virtual void acknowledge_grob (Grob_info);
   virtual void stop_translation_timestep ();
+  virtual void process_music ();
 };
 
 
@@ -58,15 +60,25 @@ Instrument_name_engraver::stop_translation_timestep ()
 }
 
 void
-Instrument_name_engraver::create_text (SCM txt)
+Instrument_name_engraver::create_text ()
 {
-  if (!text_)
+   if (!text_)
     {
+      SCM txt = get_property ("instrument");
+  
+      if (now_mom () > Moment (0))
+       txt = get_property ("instr");
+      /*
+       UGH.
+      */
+      if (txt == SCM_EOL)
+       return ;
+      
       text_ = new Item (get_property ("InstrumentName"));
       
       if (text_->get_grob_property ("text") != txt)
        text_->set_grob_property ("text", txt);
-     
+
       if (delim_)
         text_->set_parent (delim_, Y_AXIS);
       
@@ -79,16 +91,7 @@ Instrument_name_engraver::acknowledge_grob (Grob_info i)
 {
   if (Bar_line::has_interface (i.grob_))
     {
-      SCM s = get_property ("instrument");
-  
-      if (now_mom () > Moment (0))
-       s = get_property ("instr");
-
-      /*
-       FIXME: use get_markup () to check type.
-      */
-      if (gh_string_p (s) || gh_pair_p (s))
-       create_text (s);
+      create_text();
     }
 
   if (dynamic_cast<Spanner*> (i.grob_)
@@ -100,11 +103,9 @@ Instrument_name_engraver::acknowledge_grob (Grob_info i)
     groups enclosing that staff. The alignment has no real location,
     but is only a vehicle for the placement routine it contains, and
     therefore the location of its refpoint won't be very useful.
-    
 
     We could also just use stavesFound, but lets keep this working
     without staffs as well.
-
   */
   if (dynamic_cast<Spanner*> (i.grob_)
       && ((Axis_group_interface::has_interface (i.grob_)
@@ -118,16 +119,23 @@ Instrument_name_engraver::acknowledge_grob (Grob_info i)
     }
 }
 
-
-
+void
+Instrument_name_engraver::process_music ()
+{
+  /*
+    Also create text if barlines in other groups. This allows
+    a name to be attached to lyrics or chords. 
+   */
+  if (gh_string_p (get_property ("whichBar")))
+    create_text();
+}
 
 ENTER_DESCRIPTION(Instrument_name_engraver,
-/* descr */       " Prints the name of the instrument (specified by
-@code{Staff.instrument} and @code{Staff.instr})
-at the left of the
-staff.",
+/* descr */       " Prints the name of the instrument (specified by "
+" @code{Staff.instrument} and @code{Staff.instr}) "
+"at the left of the staff. ",
 /* creats*/       "InstrumentName",
-/* accepts */     "general-music",
+/* accepts */     "",
 /* acks  */      "bar-line-interface axis-group-interface",
 /* reads */       "instrument instr",
 /* write */       "");