/*
- rest-collision-reg.cc -- implement Rest_collision_engraver
+ rest-collision-engraver.cc -- implement Rest_collision_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.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:
+ DECLARE_ACKNOWLEDGER (note_column);
+ void process_acknowledged ();
+ 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 ()
{
- 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", 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_note_column (Grob_info i)
{
- if (i.elem_l_->is_type_b (Note_column::static_name()))
- note_column_l_arr_.push ((Note_column*)dynamic_cast <Item *> (i.elem_l_));
+ 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_)
- {
- typeset_element (rest_collision_p_);
- rest_collision_p_ = 0;
- }
- note_column_l_arr_.clear ();
+ rest_collision_ = 0;
+ note_columns_.clear ();
+ rest_count_ = 0;
}
+
+#include "translator.icc"
+
+ADD_ACKNOWLEDGER (Rest_collision_engraver, note_column);
+ADD_TRANSLATOR (Rest_collision_engraver,
+ /* doc */ "Handles collisions of rests.",
+ /* create */ "RestCollision",
+ /* accept */ "",
+ /* read */ "",
+ /* write */ "");