lily/multi-measure-rest-engraver.cc

   1 /*
   2   multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
   3
   4   (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
   5        Han-Wen Nienhuys <hanwen@cs.uu.nl>
   6 */
   7
   8 #include "proto.hh"
   9 #include "musical-request.hh"
  10 #include "multi-measure-rest.hh"
  11 #include "multi-measure-rest-engraver.hh"
  12 #include "score-column.hh"
  13 #include "time-description.hh"
  14
  15 IMPLEMENT_IS_TYPE_B1 (Multi_measure_rest_engraver, Engraver);
  16 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
  17
  18 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
  19 {
  20   start_measure_i_ = 0;
  21   rest_item_creation_mom_ = rest_req_stop_mom_ =0;
  22   multi_measure_req_l_ = 0;
  23   mmrest_p_ = 0;
  24 }
  25
  26 bool
  27 Multi_measure_rest_engraver::do_try_request (Request* req_l)
  28 {
  29  if (Multi_measure_rest_req *mr = dynamic_cast<Multi_measure_rest_req *> (req_l))
  30    {
  31      if (multi_measure_req_l_)
  32        if (!multi_measure_req_l_->equal_b (req_l)
  33            || req_start_mom_ != now_moment ())
  34          return false;
  35
  36      multi_measure_req_l_ = mr;
  37      req_start_mom_ = now_moment ();
  38
  39      rest_req_stop_mom_ = req_start_mom_ + multi_measure_req_l_->duration_.length ();
  40      return true;
  41    }
  42  return false;
  43 }
  44
  45 void
  46 Multi_measure_rest_engraver::do_process_requests ()
  47 {
  48   if (multi_measure_req_l_ && !mmrest_p_)
  49     {
  50       Time_description const *time = get_staff_info().time_C_;
  51       mmrest_p_ = new Multi_measure_rest;
  52       rest_item_creation_mom_ =  time->when_mom ();
  53       announce_element (Score_element_info (mmrest_p_, multi_measure_req_l_));
  54       start_measure_i_ = time->bars_i_;
  55     }
  56 }
  57
  58 void
  59 Multi_measure_rest_engraver::do_pre_move_processing ()
  60 {
  61   Moment now (now_moment ());
  62   if (mmrest_p_ && rest_item_creation_mom_ == now)
  63     {
  64       typeset_element (mmrest_p_);
  65     }
  66 }
  67
  68 void
  69 Multi_measure_rest_engraver::do_post_move_processing ()
  70 {
  71   Time_description const *time = get_staff_info().time_C_;
  72   Moment now (now_moment ());
  73   if (rest_req_stop_mom_ <= now)
  74     multi_measure_req_l_ = 0;
  75
  76   if (mmrest_p_ && (!time->whole_in_measure_ || !multi_measure_req_l_))
  77     {
  78       assert (rest_item_creation_mom_ < now);
  79       mmrest_p_->measures_i_ = time->bars_i_ - start_measure_i_;
  80       mmrest_p_ = 0;
  81     }
  82 }