X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstanza-number-engraver.cc;h=78476d9cc6da8aaeeba3162798e6b4fc59ddd488;hb=3af2bf4ef314f540a53832c6651e6c56333a37d1;hp=3978459c166cdf89c03ba7c110bf3f23714f2c0c;hpb=2804f8f79e01dc606ce067bffda2d966524e6e36;p=lilypond.git

diff --git a/lily/stanza-number-engraver.cc b/lily/stanza-number-engraver.cc
index 3978459c16..78476d9cc6 100644
--- a/lily/stanza-number-engraver.cc
+++ b/lily/stanza-number-engraver.cc
@@ -1,99 +1,88 @@
-/*   
-  lyric-number-engraver.cc --  implement Stanza_number_engraver
-  
+/*
+  lyric-number-engraver.cc -- implement Stanza_number_engraver
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>, Glen Prideaux <glenprideaux@iname.com>
-  
-  Similar to (and derived from) Instrument_name_engraver.
- */
+
+  (c) 2000--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>, Glen Prideaux <glenprideaux@iname.com>
+*/
 
 #include "engraver.hh"
+#include "side-position-interface.hh"
+#include "text-interface.hh"
 #include "item.hh"
-#include "bar.hh"
 
 class Stanza_number_engraver : public Engraver
 {
   Item *text_;
-  bool bar_b_;
 
-  void create_text (SCM s);
+  SCM last_stanza_;
 public:
-  TRANSLATOR_DECLARATIONS(Stanza_number_engraver);
-
-  virtual void process_music ();
-  virtual void stop_translation_timestep ();
+  TRANSLATOR_DECLARATIONS (Stanza_number_engraver);
+  void process_music ();
+  virtual void derived_mark () const;
+  void stop_translation_timestep ();
+  DECLARE_ACKNOWLEDGER (lyric_syllable);
 };
 
+void
+Stanza_number_engraver::derived_mark () const
+{
+  scm_gc_mark (last_stanza_);
+}
 
+/*
+  TODO: should make engraver that collects all the stanzas on a higher
+  level, and then groups them to the side. Stanza numbers should be
+  all aligned.
+*/
 
 Stanza_number_engraver::Stanza_number_engraver ()
 {
   text_ = 0;
-  bar_b_ = false;
+  last_stanza_ = SCM_EOL;
 }
 
 void
 Stanza_number_engraver::process_music ()
 {
-  if (gh_string_p (get_property ("whichBar")))
-    {
-      SCM s = get_property ("stanza");
-      
-      if (now_mom () > Moment (0))
-	s = get_property ("stz");
-
-
-      // TODO
-      if (gh_string_p (s) || gh_pair_p (s))
-
-	/*
-	  if (i.grob_l_->has_interface (symbol ("lyric-syllable-interface")))
-
-	  Tried catching lyric items to generate stanza numbers, but it
-	  spoils lyric spacing.
+  SCM stanza = get_property ("stanza");
 
-	  Works, but requires bar_engraver in LyricsVoice context apart
-	  from at beginning.  Is there any score element we can catch
-	  that will do the trick?
-
-	  What happens if we try anything at all EXCEPT a lyric? Is
-	  there anything else?  Not sure what it's catching, but it
-	  still mucks up lyrics.
-
-	*/
+  if (Text_interface::is_markup (stanza)
+      && stanza != last_stanza_)
+    {
+      last_stanza_ = stanza;
 
-	create_text (s);
+      text_ = make_item ("StanzaNumber", SCM_EOL);
+      text_->set_property ("text", stanza);
     }
 }
 
 void
-Stanza_number_engraver::stop_translation_timestep ()
+Stanza_number_engraver::acknowledge_lyric_syllable (Grob_info inf)
 {
   if (text_)
-    {
-      typeset_grob (text_);
-      text_ = 0;
-    }
+    Side_position_interface::add_support (text_, inf.grob ());
 }
 
 void
-Stanza_number_engraver::create_text (SCM txt)
+Stanza_number_engraver::stop_translation_timestep ()
 {
-  if (!text_)
-    {
-      text_ = new Item (get_property ("StanzaNumber"));
-      text_->set_grob_property ("text", txt);
-      announce_grob (text_, SCM_EOL);
-    }
+  text_ = 0;
 }
 
+#include "translator.icc"
+
+ADD_ACKNOWLEDGER (Stanza_number_engraver, lyric_syllable);
+ADD_TRANSLATOR (Stanza_number_engraver,
+		/* doc */
+		"Engrave stanza numbers.",
 
+		/* create */
+		"StanzaNumber ",
 
+		/* read */
+		"stanza ",
 
-ENTER_DESCRIPTION(Stanza_number_engraver,
-/* descr */       "",
-/* creats*/       "StanzaNumber",
-/* acks  */       "",
-/* reads */       "stz stanza",
-/* write */       "");
+		/* write */
+		""
+		);