lily/rest-engraver.cc

   1 /*
   2   rest-grav.cc -- implement Rest_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "staff-symbol-referencer.hh"
   9 #include "rest-engraver.hh"
  10 #include "musical-request.hh"
  11 #include "dots.hh"
  12 #include "rest.hh"
  13 /*
  14   Should merge with Note_head_engraver
  15  */
  16 Rest_engraver::Rest_engraver ()
  17 {
  18   rest_req_l_ =0;
  19   rest_p_ =0;
  20   dot_p_ =0;
  21 }
  22
  23 void
  24 Rest_engraver::do_post_move_processing ()
  25 {
  26   rest_req_l_ =0;
  27 }
  28
  29 void
  30 Rest_engraver::do_pre_move_processing ()
  31 {
  32   if (rest_p_)
  33     {
  34       typeset_element (rest_p_);
  35       rest_p_ =0;
  36     }
  37   if (dot_p_)
  38     {
  39       typeset_element (dot_p_);
  40       dot_p_ =0;
  41     }
  42 }
  43
  44 void
  45 Rest_engraver::do_process_requests ()
  46 {
  47   if (rest_req_l_ && !rest_p_)
  48     {
  49       rest_p_ = new Rest;
  50       Staff_symbol_referencer_interface si (rest_p_);
  51       si.set_interface ();
  52
  53       rest_p_->set_elt_property ("duration-log",
  54                                  gh_int2scm (rest_req_l_->duration_.durlog_i_));
  55
  56       if (rest_req_l_->duration_.dots_i_)
  57         {
  58           dot_p_ = new Dots;
  59
  60           Staff_symbol_referencer_interface si (dot_p_);
  61           si.set_interface ();
  62
  63           rest_p_->add_dots (dot_p_);
  64           dot_p_->dots_i_ = rest_req_l_->duration_.dots_i_;
  65           announce_element (Score_element_info (dot_p_,0));
  66         }
  67
  68       announce_element (Score_element_info (rest_p_, rest_req_l_));
  69     }
  70 }
  71
  72 bool
  73 Rest_engraver::do_try_music (Music *req)
  74 {
  75   if (Rest_req *r = dynamic_cast <Rest_req *> (req))
  76     {
  77       rest_req_l_ = r;
  78       return true;
  79     }
  80   return false;
  81 }
  82
  83
  84 ADD_THIS_TRANSLATOR(Rest_engraver);