X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fbar-number-engraver.cc;h=6ef193e2ebde5fa40abb8547ced1638df00e7e17;hb=10fce7970987502ec8340819411897a829f6be23;hp=7adc8dcdea11546bd76121830c06bfdba24698e5;hpb=75be12aa75a535af753d6125bfc03da3ee303b36;p=lilypond.git

diff --git a/lily/bar-number-engraver.cc b/lily/bar-number-engraver.cc
index 7adc8dcdea..6ef193e2eb 100644
--- a/lily/bar-number-engraver.cc
+++ b/lily/bar-number-engraver.cc
@@ -1,40 +1,120 @@
 /*
-  bar-number-grav.cc -- implement Bar_number_engraver
+  bar-number-engraver.cc -- implement Bar_number_engraver
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
+#include "paper-column.hh"
+#include "output-def.hh"
+#include "side-position-interface.hh"
+#include "engraver.hh"
+#include "context.hh"
+
+/*
+  
+TODO: detect the top staff (stavesFound), and acknowledge staff-group
+system-start-delims. If we find these, and the top staff is in the
+staff-group, add padding to the bar number.
+
+*/
+
+
+class Bar_number_engraver : public Engraver
+{
+protected:
+  Item* text_;
+protected:
+  virtual void stop_translation_timestep ();
+  virtual void acknowledge_grob (Grob_info);
+  virtual void process_music ();
+  void create_items ();
+  TRANSLATOR_DECLARATIONS (Bar_number_engraver );
+};
 
-#include "bar-number-engraver.hh"
-#include "time-description.hh"
-#include "timing-engraver.hh"
-#include "engraver-group.hh"
-#include "g-text-item.hh"
 
-Bar_number_engraver::Bar_number_engraver()
+void
+Bar_number_engraver::process_music ()
 {
-  axis_ = Y_AXIS;
-  type_ = "barNumber";
-  visibility_lambda_
-    = gh_eval_str ("(lambda (d) (if (= d 1) '(#f . #f) '(#t . #t)))");
+  // todo include (&&!time->cadenza_b_)
+
+  SCM wb = get_property ("whichBar");
+  
+  if (scm_is_string (wb))
+    {
+      Moment mp (robust_scm2moment (get_property ("measurePosition"), Moment (0)));
+      if (mp.main_part_ == Rational (0))
+	{
+	  SCM bn = get_property ("currentBarNumber");
+	  SCM proc = get_property ("barNumberVisibility");
+	  if (scm_is_number (bn) && ly_c_procedure_p (proc)
+	      && to_boolean (scm_call_1(proc, bn)))
+	    {
+	      create_items ();
+	      // guh.
+	      text_->set_property
+		("text", scm_makfrom0str (to_string (scm_to_int (bn)).to_str0 ()));
+	    }
+	}
+    }
+
 }
 
+
+
+Bar_number_engraver::Bar_number_engraver ()
+{
+  text_ = 0;
+}
+
+					       
 void
-Bar_number_engraver::do_process_requests ()
+Bar_number_engraver::acknowledge_grob (Grob_info inf)
 {
-  Translator *tr = daddy_grav_l ()->get_simple_translator ("Timing_engraver");
-  Timing_translator *timer = dynamic_cast<Timing_translator*>(tr);
-  Time_description *time = &timer->time_;
+  Grob * s = inf.grob_;
+  if (text_
+      && dynamic_cast<Item*> (s)
+      && s->get_property ("break-align-symbol") == ly_symbol2scm ("left-edge"))
+    {
+      /*
+	By default this would land on the Paper_column -- so why
+	doesn't it work when you leave this out?  */
+      text_->set_parent (s, X_AXIS);
+    }
+}
 
-  if (!time->whole_in_measure_ && !time->cadenza_b_ && now_moment () > Moment (0))
+void 
+Bar_number_engraver::stop_translation_timestep ()
+{
+  if (text_)
     {
-      create_items (0);
-	
-      text_p_->text_str_ = to_str (time->bars_i_);
-      text_p_->style_str_ = "roman";
+      text_->set_property ("side-support-elements", get_property ("stavesFound"));
+      
+      text_ = 0;
     }
 }
 
-ADD_THIS_TRANSLATOR(Bar_number_engraver);
+
+void
+Bar_number_engraver::create_items ()
+{
+  if (text_)
+    return;
+
+  text_ = make_item ("BarNumber", SCM_EOL);
+  Side_position_interface::set_axis (text_, Y_AXIS);
+}
+
+ADD_TRANSLATOR (Bar_number_engraver,
+/* descr */       "A bar number is created whenever measurePosition is zero. It is\n"
+		   "put on top of all staves, and appears only at  left side of the staff. "
+		   "The staves are taken from @code{stavesFound}, which is maintained by "
+		   "@code{@ref{Staff_collecting_engraver}}. "
+		   ,
+		   
+/* creats*/       "BarNumber",
+/* accepts */     "",
+/* acks  */      "break-aligned-interface",
+/* reads */       "currentBarNumber stavesFound barNumberVisibility" ,
+/* write */       "");