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 "paper-column.hh"
  13 #include "engraver-group-engraver.hh"
  14 #include "timing-translator.hh"
  15 #include "bar.hh"
  16 #include "staff-symbol-referencer.hh"
  17
  18
  19 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
  20
  21 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
  22 {
  23   start_measure_i_ = 0;
  24   rest_moments_[START] =
  25     rest_moments_[STOP] =0;
  26   multi_measure_req_l_ = 0;
  27
  28   lastrest_p_ =0;
  29   mmrest_p_ = 0;
  30 }
  31
  32 void
  33 Multi_measure_rest_engraver::acknowledge_element (Score_element_info i)
  34 {
  35   if (Bar *c = dynamic_cast<Bar*> (i.elem_l_))
  36     {
  37       if (mmrest_p_)
  38         mmrest_p_->add_column (c);
  39       if (lastrest_p_)
  40         lastrest_p_->add_column (c);
  41     }
  42 }
  43
  44 bool
  45 Multi_measure_rest_engraver::do_try_music (Music* req_l)
  46 {
  47   Rhythmic_req *r=0;
  48   if (Multi_measure_rest_req *mr =
  49       dynamic_cast<Multi_measure_rest_req *> (req_l))
  50     r=mr;
  51   else if (Repetitions_req *rr =
  52            dynamic_cast<Repetitions_req *> (req_l))
  53     r=rr;
  54   if (r)
  55     {
  56       if (multi_measure_req_l_)
  57         if (!multi_measure_req_l_->equal_b (r)
  58             || rest_moments_[START] != now_mom ())
  59           return false;
  60
  61       multi_measure_req_l_ = r;
  62       rest_moments_[START] = now_mom ();
  63
  64       rest_moments_[STOP] = rest_moments_[START] +
  65         multi_measure_req_l_->duration_.length_mom ();
  66       return true;
  67     }
  68   return false;
  69 }
  70
  71 void
  72 Multi_measure_rest_engraver::do_process_requests ()
  73 {
  74   if (multi_measure_req_l_ && !mmrest_p_)
  75     {
  76
  77       Translator * tr = daddy_grav_l()->get_simple_translator ("Timing_engraver");      // ugh
  78       Timing_translator * time = dynamic_cast<Timing_translator*> (tr);
  79
  80       mmrest_p_ = new Multi_measure_rest;
  81       Staff_symbol_referencer_interface si (mmrest_p_);
  82       si.set_interface ();
  83
  84
  85       if(dynamic_cast<Repetitions_req *> (multi_measure_req_l_))
  86         mmrest_p_->set_elt_property ("alt-symbol",
  87                                      ly_str02scm ("scripts-repeatsign"));
  88       announce_element (Score_element_info (mmrest_p_, multi_measure_req_l_));
  89       start_measure_i_
  90         = gh_scm2int (time->get_property ("currentBarNumber", 0));
  91     }
  92 }
  93
  94 void
  95 Multi_measure_rest_engraver::do_pre_move_processing ()
  96 {
  97   Moment now (now_mom ());
  98   Translator * tr = daddy_grav_l()->get_simple_translator ("Timing_engraver");  // ugh
  99   Timing_translator * time  = dynamic_cast<Timing_translator*> (tr);
 100
 101
 102   if (mmrest_p_ && (now >= rest_moments_[START])
 103     && !time->measure_position ()
 104     && (scm_ilength (mmrest_p_->get_elt_property ("columns")) >= 2))
 105     {
 106       typeset_element (mmrest_p_);
 107       /*
 108         must keep mmrest_p_ around to set measures_i_
 109        */
 110     }
 111   if (lastrest_p_)
 112     {
 113       typeset_element (lastrest_p_);
 114       lastrest_p_ = 0;
 115     }
 116 }
 117
 118 void
 119 Multi_measure_rest_engraver::do_post_move_processing ()
 120 {
 121   Translator * tr = daddy_grav_l()->get_simple_translator ("Timing_engraver");  // ugh
 122   Timing_translator * time  = dynamic_cast<Timing_translator*> (tr);
 123
 124   Moment now (now_mom ());
 125
 126   if (mmrest_p_ && !time->measure_position ())
 127     {
 128       lastrest_p_ = mmrest_p_;
 129       lastrest_p_->measures_i_
 130         = gh_scm2int (time->get_property ("currentBarNumber", 0)) - start_measure_i_;
 131       mmrest_p_ = 0;
 132     }
 133
 134   if (now >= rest_moments_[STOP])
 135     {
 136       multi_measure_req_l_ = 0;
 137       mmrest_p_ = 0;
 138     }
 139 }
 140
 141