X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fligature-bracket-engraver.cc;h=34218968316a2bd2131034949779348576cb10af;hb=b535b623598d6dec042edc50961fe1baa14a54a2;hp=aeebbc86d9b9a5b034d74b0d8091d77e2ed2a6c8;hpb=14d74ac262744d16fc753ee41042d32860d58633;p=lilypond.git

diff --git a/lily/ligature-bracket-engraver.cc b/lily/ligature-bracket-engraver.cc
index aeebbc86d9..3421896831 100644
--- a/lily/ligature-bracket-engraver.cc
+++ b/lily/ligature-bracket-engraver.cc
@@ -1,62 +1,126 @@
-/*   
+/*
   ligature-bracket-engraver.cc -- implement Ligature_bracket_engraver
-  
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 2002--2004 Juergen Reuter <reuter@ipd.uka.de>
-  
- */
+
+  (c) 2002--2009 Juergen Reuter <reuter@ipd.uka.de>
+*/
+
+#include "international.hh"
 
 #include "ligature-engraver.hh"
 #include "note-column.hh"
 #include "tuplet-bracket.hh"
 #include "spanner.hh"
+#include "stream-event.hh"
+#include "spanner.hh"
+#include "item.hh"
 
-/*
- * This engraver marks ligatures of any kind by just printing a
- * horizontal square bracket on top of each ligature.  See class
- * Ligature_engraver for more information on the interaction between
- * this class and its superclass.
- */
-class Ligature_bracket_engraver : public Ligature_engraver
+#include "translator.icc"
+
+class Ligature_bracket_engraver : public Engraver
 {
 protected:
-  virtual Spanner *create_ligature_spanner ();
-  virtual void acknowledge_grob (Grob_info);
+  virtual void process_music ();
+  virtual void stop_translation_timestep ();
+  DECLARE_ACKNOWLEDGER (rest);
+  DECLARE_ACKNOWLEDGER (note_column);
+  DECLARE_TRANSLATOR_LISTENER (ligature);
 public:
   TRANSLATOR_DECLARATIONS (Ligature_bracket_engraver);
-};
 
+private:
+  Drul_array<Stream_event *> events_drul_;
+  Spanner *finished_ligature_;
+  Spanner *ligature_;
+  Stream_event *previous_start_event_;
+};
 
-Ligature_bracket_engraver::Ligature_bracket_engraver ()
+IMPLEMENT_TRANSLATOR_LISTENER (Ligature_bracket_engraver, ligature);
+void
+Ligature_bracket_engraver::listen_ligature (Stream_event *ev)
 {
+  Direction d = to_dir (ev->get_property ("span-direction"));
+  ASSIGN_EVENT_ONCE (events_drul_[d], ev);
 }
 
-Spanner *
-Ligature_bracket_engraver::create_ligature_spanner ()
+Ligature_bracket_engraver::Ligature_bracket_engraver ()
 {
-  return make_spanner ("LigatureBracket", SCM_EOL);
+  ligature_ = 0;
+  finished_ligature_ = 0;
+  events_drul_[LEFT] = events_drul_[RIGHT] = 0;
+  previous_start_event_ = 0;
 }
 
-
 void
-Ligature_bracket_engraver::acknowledge_grob (Grob_info info)
+Ligature_bracket_engraver::process_music()
 {
-  if (current_ligature ())
+  if (events_drul_[STOP])
+    {
+      if (!ligature_)
+	{
+	  events_drul_[STOP]->origin ()->warning (_ ("cannot find start of ligature"));
+	  return;
+	}
+
+      finished_ligature_ = ligature_;
+      ligature_ = 0;
+      previous_start_event_ = 0;
+    }
+
+  if (events_drul_[START])
     {
-      if (Note_column::has_interface (info.grob_))
+      if (ligature_)
 	{
-	  Tuplet_bracket::add_column (current_ligature (),
-				      dynamic_cast<Item*> (info.grob_));
+	  events_drul_[START]->origin ()->warning (_ ("already have a ligature"));
+	  return;
 	}
-      else Ligature_engraver::acknowledge_grob (info);
+
+      previous_start_event_ = events_drul_[START];
+      ligature_ = make_spanner ("LigatureBracket", events_drul_[START]->self_scm ());
     }
 }
 
+void
+Ligature_bracket_engraver::acknowledge_note_column (Grob_info info)
+{
+  if (ligature_)
+    {
+      Tuplet_bracket::add_column (ligature_,
+				  info.item ());
+      add_bound_item (ligature_, info.item());
+    }
+}
+
+void
+Ligature_bracket_engraver::acknowledge_rest (Grob_info info)
+{
+  acknowledge_note_column(info);
+}
+
+
+void
+Ligature_bracket_engraver::stop_translation_timestep ()
+{
+  events_drul_[LEFT] =  
+    events_drul_[RIGHT] = 0;
+  finished_ligature_ = 0;
+}
+
+ADD_ACKNOWLEDGER (Ligature_bracket_engraver, rest);
+ADD_ACKNOWLEDGER (Ligature_bracket_engraver, note_column);
+
 ADD_TRANSLATOR (Ligature_bracket_engraver,
-/* descr */       "Handles Ligature_events by engraving Ligature brackets.",
-/* creats*/       "TupletBracket",
-/* accepts */     "ligature-event",
-/* acks  */      "rest-interface note-column-interface",
-/* reads */       "",
-/* write */       "");
+		/* doc */
+		"Handle @code{Ligature_events} by engraving @code{Ligature}"
+		" brackets.",
+
+		/* create */
+		"LigatureBracket ",
+
+		/* read */
+		"",
+
+		/* write */
+		""
+		);