X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fligature-bracket-engraver.cc;h=091388f7e66ecc58a8d144dd132da324932f11ff;hb=a38a563f999c2b0c6fe2715e19b14afe77108338;hp=25702af274c554780a8a02efa7103144f972a602;hpb=f2c2c5c43858f323e4708f83fd97e0f38017c275;p=lilypond.git

diff --git a/lily/ligature-bracket-engraver.cc b/lily/ligature-bracket-engraver.cc
index 25702af274..091388f7e6 100644
--- a/lily/ligature-bracket-engraver.cc
+++ b/lily/ligature-bracket-engraver.cc
@@ -3,64 +3,124 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 2002--2005 Juergen Reuter <reuter@ipd.uka.de>
+  (c) 2002--2007 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 ();
-  DECLARE_ACKNOWLEDGER(rest);
-  DECLARE_ACKNOWLEDGER(note_column);
+  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_;
 };
 
+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);
+}
+
 Ligature_bracket_engraver::Ligature_bracket_engraver ()
 {
+  ligature_ = 0;
+  finished_ligature_ = 0;
+  events_drul_[LEFT] = events_drul_[RIGHT] = 0;
+  previous_start_event_ = 0;
 }
 
-Spanner *
-Ligature_bracket_engraver::create_ligature_spanner ()
+void
+Ligature_bracket_engraver::process_music()
 {
-  return make_spanner ("LigatureBracket", SCM_EOL);
+  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 (ligature_)
+	{
+	  events_drul_[START]->origin ()->warning (_ ("already have a ligature"));
+	  return;
+	}
+
+      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 (current_ligature ())
+  if (ligature_)
     {
-      Tuplet_bracket::add_column (current_ligature (),
-				  dynamic_cast<Item *> (info.grob ()));
+      Tuplet_bracket::add_column (ligature_,
+				  info.item ());
+      add_bound_item (ligature_, info.item());
     }
 }
 
 void
 Ligature_bracket_engraver::acknowledge_rest (Grob_info info)
 {
-  if (current_ligature ())
-    Ligature_engraver::acknowledge_rest (info);
+  acknowledge_note_column(info);
 }
 
-#include "translator.icc"
 
-ADD_ACKNOWLEDGER(Ligature_bracket_engraver, rest);
-ADD_ACKNOWLEDGER(Ligature_bracket_engraver, note_column);
+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",
-		/* reads */ "",
-		/* write */ "");
+		/* doc */
+		"Handle @code{Ligature_events} by engraving @code{Ligature}"
+		" brackets.",
+
+		/* create */
+		"LigatureBracket ",
+
+		/* read */
+		"",
+
+		/* write */
+		""
+		);