release: 1.5.37

[lilypond.git] / lily / bar-number-engraver.cc

diff --git a/lily/bar-number-engraver.cc b/lily/bar-number-engraver.cc
index 1b4646f14ca6f2fd39eee5b937cb8758c1fdeaf2..5d6373392fb014ef4d325d96d4ba63f030b1c8ec 100644 (file)
--- a/lily/bar-number-engraver.cc
+++ b/lily/bar-number-engraver.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
 
@@ -11,7 +11,6 @@
 #include "paper-column.hh"
 #include "paper-def.hh"
 #include "side-position-interface.hh"
-#include "staff-symbol.hh"
 #include "item.hh"
 #include "moment.hh"
 #include "engraver.hh"
@@ -22,70 +21,61 @@ class Bar_number_engraver : public Engraver
 {
 protected:
   Item* text_p_;
-
 protected:
   virtual void stop_translation_timestep ();
   virtual void acknowledge_grob (Grob_info);
-  virtual void do_creation_processing ();
-  virtual void create_grobs ();
-  void create_items();
-
-public:
-  VIRTUAL_COPY_CONS(Translator);
-  Bar_number_engraver();
+  virtual void process_music ();
+  void create_items ();
+  TRANSLATOR_DECLARATIONS(  Bar_number_engraver );
 };
 
+
+/*
+  TODO: more advanced formatting via SCM function, perhaps barnumbers
+  every 5 measures?  */
+
 void
-Bar_number_engraver::create_grobs ()
+Bar_number_engraver::process_music ()
 {
-  // todo include (&&!time->cadenza_b_ )
-  SCM bn = get_property("currentBarNumber");
-  SCM smp = get_property ("measurePosition");
-  Moment mp =  (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
+  // todo include (&&!time->cadenza_b_)
+
+  SCM wb = get_property ("whichBar");
   
-  if (gh_number_p (bn) &&
-      !mp && now_mom () > Moment (0))
+  if (gh_string_p (wb))
     {
-      create_items ();
-
-      // guh.
-      text_p_->set_grob_property ("text",
-                                ly_str02scm (to_str (gh_scm2int (bn)).ch_C()));
+      SCM bn = get_property ("currentBarNumber");
+      SCM smp = get_property ("measurePosition");
+      int ibn = gh_number_p (bn) ? gh_scm2int(bn) : 1;
+      
+      Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
+      if (mp.main_part_ == Rational (0)
+         && ibn != 1)
+       {
+         create_items ();
+         
+         // guh.
+         text_p_->set_grob_property ("text",
+                                     ly_str02scm (to_str (gh_scm2int (bn)).ch_C ()));
+       }
     }
+
 }
 
-ADD_THIS_TRANSLATOR(Bar_number_engraver);
+
 
 Bar_number_engraver::Bar_number_engraver ()
 {
   text_p_ =0;
 }
 
-void
-Bar_number_engraver::do_creation_processing ()
-{
-  /*
-    ugh: need to share code with mark_engraver
-   */
-  daddy_trans_l_->set_property ("staffsFound", SCM_EOL); 
-}
-
-
                                               
 void
 Bar_number_engraver::acknowledge_grob (Grob_info inf)
 {
-  Grob * s = inf.elem_l_;
-  if (Staff_symbol::has_interface (s))
-    {
-      SCM sts = get_property ("staffsFound");
-      SCM thisstaff = inf.elem_l_->self_scm ();
-      if (scm_memq (thisstaff, sts) == SCM_BOOL_F)
-       daddy_trans_l_->set_property ("staffsFound", gh_cons (thisstaff, sts));
-    }
-  else if (text_p_
-          && dynamic_cast<Item*> (s)
-          && s->get_grob_property ("break-align-symbol") == ly_symbol2scm ("Left_edge_item"))
+  Grob * s = inf.grob_l_;
+  if (text_p_
+      && dynamic_cast<Item*> (s)
+      && s->get_grob_property ("break-align-symbol") == ly_symbol2scm ("left-edge"))
     {
       /*
        By default this would land on the Paper_column -- so why
@@ -99,7 +89,7 @@ Bar_number_engraver::stop_translation_timestep ()
 {
   if (text_p_)
     {
-      text_p_->set_grob_property ("side-support-elements", get_property ("staffsFound"));
+      text_p_->set_grob_property ("side-support-elements", get_property ("stavesFound"));
       typeset_grob (text_p_);
       text_p_ =0;
     }
@@ -114,8 +104,15 @@ Bar_number_engraver::create_items ()
 
   SCM b = get_property ("BarNumber");
   text_p_ = new Item (b);
-  Side_position::set_axis(text_p_,Y_AXIS);
+  Side_position_interface::set_axis (text_p_,Y_AXIS);
 
-  announce_grob (text_p_, 0);
+  announce_grob(text_p_, SCM_EOL);
 }
 
+ENTER_DESCRIPTION(Bar_number_engraver,
+/* descr */       "A bar number is created whenever measurePosition is zero. It is
+put on top of all staves, and appears only at  left side of the staff.",
+/* creats*/       "BarNumber",
+/* acks  */       "break-aligned-interface",
+/* reads */       "currentBarNumber stavesFound" ,
+/* write */       "");