lily/rest-collision-grav.cc

   1 /*
   2   rest-collision-reg.cc -- implement Rest_collision_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "debug.hh"
  10 #include "rest-collision.hh"
  11 #include "rest-collision-grav.hh"
  12 #include "collision.hh"
  13 #include "rest-column.hh"
  14 #include "note-column.hh"
  15
  16
  17 IMPLEMENT_IS_TYPE_B1(Rest_collision_engraver, Engraver);
  18 ADD_THIS_ENGRAVER(Rest_collision_engraver);
  19
  20 Rest_collision_engraver::Rest_collision_engraver()
  21 {
  22   rest_collision_p_ =0;
  23 }
  24
  25 void
  26 Rest_collision_engraver::make_collision()
  27 {
  28   if (!rest_collision_p_)
  29     {
  30             rest_collision_p_ = new Rest_collision;
  31             announce_element (Score_elem_info (rest_collision_p_, 0));
  32     }
  33 }
  34 void
  35 Rest_collision_engraver::acknowledge_element (Score_elem_info i)
  36 {
  37   char const * nC = i.elem_l_->name();
  38   if (nC == Note_column::static_name())
  39     {
  40         // what should i do, what should _engraver do?
  41         make_collision();
  42         rest_collision_p_->add ((Note_column*)i.elem_l_->item());
  43     }
  44   else if (nC == Rest_column::static_name())
  45     {
  46         make_collision();
  47         rest_collision_p_->add ((Rest_column*)i.elem_l_->item());
  48     }
  49 }
  50
  51 void
  52 Rest_collision_engraver::do_pre_move_processing()
  53 {
  54   if (rest_collision_p_)
  55     {
  56         typeset_element (rest_collision_p_);
  57         rest_collision_p_ = 0;
  58     }
  59 }
  60
  61 void
  62 Rest_collision_engraver::do_print() const
  63 {
  64 #ifndef NPRINT
  65   if (rest_collision_p_)
  66         rest_collision_p_->print();
  67 #endif
  68 }