lily/multi-measure-rest-engraver.cc

   1 /*
   2   multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
   3
   4   (c) 1998--1999 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 "bar.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_moments_[START] =
  23     rest_moments_[STOP] =0;
  24   multi_measure_req_l_ = 0;
  25
  26   lastrest_p_ =0;
  27   mmrest_p_ = 0;
  28 }
  29
  30 void
  31 Multi_measure_rest_engraver::acknowledge_element (Score_element_info i)
  32 {
  33   if (Bar *c = dynamic_cast<Bar*> (i.elem_l_))
  34     {
  35       if (mmrest_p_)
  36         mmrest_p_->add_column (c);
  37       if (lastrest_p_)
  38         lastrest_p_->add_column (c);
  39     }
  40 }
  41
  42 bool
  43 Multi_measure_rest_engraver::do_try_music (Music* req_l)
  44 {
  45  if (Multi_measure_rest_req *mr = dynamic_cast<Multi_measure_rest_req *> (req_l))
  46    {
  47      if (multi_measure_req_l_)
  48        if (!multi_measure_req_l_->equal_b (mr)
  49            || rest_moments_[START] != now_mom ())
  50          return false;
  51
  52      multi_measure_req_l_ = mr;
  53      rest_moments_[START] = now_mom ();
  54
  55      rest_moments_[STOP] = rest_moments_[START] + multi_measure_req_l_->duration_.length_mom ();
  56      return true;
  57    }
  58  return false;
  59 }
  60
  61 void
  62 Multi_measure_rest_engraver::do_process_requests ()
  63 {
  64   if (multi_measure_req_l_ && !mmrest_p_)
  65     {
  66       Time_description const *time = get_staff_info().time_C_;
  67       mmrest_p_ = new Multi_measure_rest;
  68       announce_element (Score_element_info (mmrest_p_, multi_measure_req_l_));
  69       start_measure_i_ = time->bars_i_;
  70     }
  71 }
  72
  73 void
  74 Multi_measure_rest_engraver::do_pre_move_processing ()
  75 {
  76   Moment now (now_mom ());
  77   Time_description const *time = get_staff_info().time_C_;
  78   if (mmrest_p_ && (now >= rest_moments_[START])
  79     && !time->whole_in_measure_
  80     && (mmrest_p_->column_arr_.size () >= 2))
  81     {
  82       typeset_element (mmrest_p_);
  83       /*
  84         must keep mmrest_p_ around to set measures_i_
  85        */
  86     }
  87   if (lastrest_p_)
  88     {
  89       typeset_element (lastrest_p_);
  90       lastrest_p_ = 0;
  91     }
  92 }
  93
  94 void
  95 Multi_measure_rest_engraver::do_post_move_processing ()
  96 {
  97   Time_description const *time = get_staff_info().time_C_;
  98   Moment now (now_mom ());
  99
 100   if (mmrest_p_ && !time->whole_in_measure_)
 101     {
 102       lastrest_p_ = mmrest_p_;
 103       lastrest_p_->measures_i_ = time->bars_i_ - start_measure_i_;
 104       mmrest_p_ = 0;
 105     }
 106
 107   if (now >= rest_moments_[STOP])
 108     {
 109       multi_measure_req_l_ = 0;
 110       mmrest_p_ = 0;
 111     }
 112 }
 113