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 #include "p-score.hh"
  15
  16
  17 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
  18
  19 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
  20 {
  21   start_measure_i_ = 0;
  22   rest_item_creation_mom_ = rest_req_stop_mom_ =0;
  23   multi_measure_req_l_ = 0;
  24   mmrest_p_ = 0;
  25 }
  26
  27 bool
  28 Multi_measure_rest_engraver::do_try_music (Music* req_l)
  29 {
  30  if (Multi_measure_rest_req *mr = dynamic_cast<Multi_measure_rest_req *> (req_l))
  31    {
  32      if (multi_measure_req_l_)
  33        if (!multi_measure_req_l_->equal_b (mr)
  34            || req_start_mom_ != now_moment ())
  35          return false;
  36
  37      multi_measure_req_l_ = mr;
  38      req_start_mom_ = now_moment ();
  39
  40      rest_req_stop_mom_ = req_start_mom_ + multi_measure_req_l_->duration_.length ();
  41      return true;
  42    }
  43  return false;
  44 }
  45
  46 void
  47 Multi_measure_rest_engraver::do_process_requests ()
  48 {
  49   if (multi_measure_req_l_ && !mmrest_p_)
  50     {
  51       Time_description const *time = get_staff_info().time_C_;
  52       mmrest_p_ = new Multi_measure_rest;
  53       rest_item_creation_mom_ = time->when_mom ();
  54
  55       rest_item_creation_mom_ += time->whole_per_measure_ / Moment (2);
  56 #if 0
  57       // core dump because of missing column?
  58       mmrest_p_->pscore_l_->add_column (new Score_column (rest_item_creation_mom_));
  59       mmrest_p_->pscore_l_->add_column (new Score_column (rest_item_creation_mom_, true));
  60 #endif
  61
  62       announce_element (Score_element_info (mmrest_p_, multi_measure_req_l_));
  63       start_measure_i_ = time->bars_i_;
  64     }
  65 }
  66
  67 void
  68 Multi_measure_rest_engraver::do_pre_move_processing ()
  69 {
  70   Moment now (now_moment ());
  71   if (mmrest_p_ && rest_item_creation_mom_ == now)
  72     {
  73       typeset_element (mmrest_p_);
  74     }
  75 }
  76
  77 void
  78 Multi_measure_rest_engraver::do_post_move_processing ()
  79 {
  80   Time_description const *time = get_staff_info().time_C_;
  81   Moment now (now_moment ());
  82   if (rest_req_stop_mom_ <= now)
  83     multi_measure_req_l_ = 0;
  84
  85   if (mmrest_p_ && (!time->whole_in_measure_ || !multi_measure_req_l_))
  86     {
  87       assert (rest_item_creation_mom_ < now);
  88       mmrest_p_ = 0;
  89     }
  90 }