lily/rest-grav.cc

   1 /*
   2   rest-grav.cc -- implement Rest_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "rest-grav.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       rest_p_->balltype_i_ = rest_req_l_->duration_.durlog_i_;
  51       rest_p_->dots_i_ = rest_req_l_->duration_.dots_i_;
  52       if (rest_p_->dots_i_)
  53         {
  54           dot_p_ = new Dots;
  55           rest_p_->dots_l_  =dot_p_;
  56           announce_element (Score_elem_info (dot_p_,0));
  57         }
  58       announce_element (Score_elem_info (rest_p_, rest_req_l_));
  59     }
  60 }
  61
  62 bool
  63 Rest_engraver::do_try_request (Request *r)
  64 {
  65   Musical_req *m = r->musical ();
  66   if (!m || !m->rest ())
  67     return false;
  68
  69   rest_req_l_ = m->rest ();     // ugh
  70   return true;
  71 }
  72
  73 IMPLEMENT_IS_TYPE_B1(Rest_engraver, Engraver);
  74 ADD_THIS_TRANSLATOR(Rest_engraver);