* lily/rest.cc (polyphonic_offset_callback): new function. Do

[lilypond.git] / lily / rest-collision-engraver.cc

diff --git a/lily/rest-collision-engraver.cc b/lily/rest-collision-engraver.cc
index 89ac8e65316395df4975487433789f46984dc553..893a781501311fceb53f3ccc938ee01fc50c6cc2 100644 (file)
--- a/lily/rest-collision-engraver.cc
+++ b/lily/rest-collision-engraver.cc
@@ -3,50 +3,77 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
-#include "debug.hh"
+#include "warn.hh"
+#include "engraver.hh"
 #include "rest-collision.hh"
-#include "rest-collision-engraver.hh"
-#include "collision.hh"
 #include "note-column.hh"
 
+class Rest_collision_engraver : public Engraver
+{
+  Item* rest_collision_;
+  int rest_count_; 
+  Link_array<Grob> note_columns_;
+protected:
+  virtual void acknowledge_grob (Grob_info);
+  virtual void process_acknowledged_grobs ();
+  virtual void stop_translation_timestep ();
+public:
+  TRANSLATOR_DECLARATIONS(Rest_collision_engraver);  
+};
 
-IMPLEMENT_IS_TYPE_B1(Rest_collision_engraver, Engraver);
-ADD_THIS_TRANSLATOR(Rest_collision_engraver);
-
-Rest_collision_engraver::Rest_collision_engraver()
+Rest_collision_engraver::Rest_collision_engraver ()
 {
-  rest_collision_p_ =0;
+  rest_collision_ =0;
+  rest_count_ = 0;
 }
 
 void
-Rest_collision_engraver::process_acknowledged ()
+Rest_collision_engraver::process_acknowledged_grobs ()
 {
-  if (rest_collision_p_ ||   note_column_l_arr_.size () < 2)
+  if (rest_collision_
+      || note_columns_.is_empty ()
+      || !rest_count_ 
+      || (note_columns_.size () == rest_count_
+         && rest_count_  < 2))
     return;
 
-  rest_collision_p_ = new Rest_collision;
-  announce_element (Score_element_info (rest_collision_p_, 0));
-  for (int i=0; i< note_column_l_arr_.size (); i++)
-    rest_collision_p_->add_column (note_column_l_arr_[i]);
+  rest_collision_ = make_item ("RestCollision");
+
+  announce_grob(rest_collision_, SCM_EOL);
+  for (int i=0; i < note_columns_.size (); i++)
+    Rest_collision::add_column (rest_collision_,note_columns_[i]);
 }
 
 void
-Rest_collision_engraver::acknowledge_element (Score_element_info i)
+Rest_collision_engraver::acknowledge_grob (Grob_info i)
 {
-  if (dynamic_cast<Note_column *> (i.elem_l_))
-    note_column_l_arr_.push (dynamic_cast<Note_column *> (i.elem_l_));
+  if (Note_column::has_interface (i.grob_))
+    {
+      note_columns_.push (i.grob_);
+      if (Note_column::has_rests (i.grob_))
+       rest_count_ ++;
+    }
 }
 
 void
-Rest_collision_engraver::do_pre_move_processing()
+Rest_collision_engraver::stop_translation_timestep ()
 {
-  if (rest_collision_p_) 
+  if (rest_collision_) 
     {
-      typeset_element (rest_collision_p_);
-      rest_collision_p_ = 0;
+      typeset_grob (rest_collision_);
+      rest_collision_ = 0;
     }
-  note_column_l_arr_.clear ();
+  note_columns_.clear ();
+  rest_count_ = 0;
 }
+
+ENTER_DESCRIPTION(Rest_collision_engraver,
+/* descr */       "Handles collisions of rests.",
+/* creats*/       "RestCollision",
+/* accepts */     "",
+/* acks  */      "note-column-interface",
+/* reads */       "",
+/* write */       "");