lily/stem-beam-grav.cc

   1 /*
   2   stem-beam-reg.cc -- part of GNU LilyPond
   3
   4   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   5 */
   6
   7 #include "musical-request.hh"
   8 #include "stem-beam-grav.hh"
   9 #include "beam.hh"
  10 #include "stem.hh"
  11 #include "grouping.hh"
  12 #include "text-spanner.hh"
  13 #include "debug.hh"
  14 #include "grouping.hh"
  15 #include "note-head.hh"
  16 #include "time-description.hh"
  17
  18 Stem_beam_engraver::Stem_beam_engraver()
  19 {
  20     do_post_move_processing();
  21
  22     current_grouping = 0;
  23     beam_p_ = 0;
  24     default_dir_i_ =0;
  25     start_req_l_ = 0;
  26 }
  27
  28 bool
  29 Stem_beam_engraver::do_try_request(Request*req_l)
  30 {
  31
  32     Musical_req* mus_l = req_l->musical();
  33     /* Debiele puntkomma's. Laat je er eentje per ongeluk achter een
  34       if(..) staan, lijkt het net op een luis in gcc.
  35
  36       (ofwel Python rules)
  37       */
  38     if (!mus_l)
  39         return false;
  40
  41
  42     if ( mus_l->beam() ) {
  43         if (bool(beam_p_ ) == bool(mus_l->beam()->spantype == Span_req::START))
  44             return false;
  45
  46         if (beam_req_l_ && Beam_req::compare(*beam_req_l_ , *mus_l->beam()))
  47             return false;
  48
  49         beam_req_l_ = mus_l->beam();
  50         return true;
  51     }
  52
  53     if ( mus_l->stem() ) {
  54         if (current_grouping && !current_grouping->child_fit_b(
  55             get_staff_info().time_C_->whole_in_measure_))
  56             return false;
  57
  58         if (stem_req_l_ && Stem_req::compare(*stem_req_l_, *mus_l->stem()))
  59             return false;
  60
  61         stem_req_l_ = mus_l->stem();
  62         return true;
  63     }
  64     return false;
  65 }
  66
  67 void
  68 Stem_beam_engraver::do_process_requests()
  69 {
  70     if (beam_req_l_) {
  71         if (beam_req_l_->spantype == Span_req::STOP) {
  72             end_beam_b_ = true;
  73             start_req_l_ = 0;
  74         } else {
  75             beam_p_ = new Beam;
  76             start_req_l_ = beam_req_l_;
  77             beam_p_->left_col_l_ = get_staff_info().musical_pcol_l();
  78             current_grouping = new Rhythmic_grouping;
  79             if (beam_req_l_->nplet) {
  80                 Text_spanner* t = new Text_spanner();
  81                 Text_def *defp = new Text_def;
  82                 t->set_support(beam_p_);
  83                 defp->align_i_ = 0;
  84                 defp->text_str_ = beam_req_l_->nplet;
  85                 defp->style_str_="italic";
  86                 t->spec_p_  = defp;
  87                 typeset_element(t);
  88             }
  89
  90         }
  91     }
  92
  93     if (stem_req_l_) {
  94         stem_p_ = new Stem(8);
  95         if (current_grouping)
  96             current_grouping->add_child(
  97                 get_staff_info().time_C_->whole_in_measure_,
  98                 stem_req_l_->duration());
  99
 100         stem_p_->flag_i_ = stem_req_l_->duration_.type_i_;
 101
 102         if (beam_p_) {
 103             if (stem_req_l_->duration_.type_i_<= 4)
 104                 stem_req_l_->warning( "stem doesn't fit in Beam");
 105             else
 106                 beam_p_->add(stem_p_);
 107             stem_p_->print_flag_b_ = false;
 108         } else {
 109             stem_p_->print_flag_b_ = true;
 110         }
 111
 112         announce_element(Score_elem_info(stem_p_, stem_req_l_));
 113     }
 114 }
 115
 116 void
 117 Stem_beam_engraver::acknowledge_element(Score_elem_info info)
 118 {
 119     if (!stem_p_)
 120         return;
 121
 122     if (info.elem_l_->name() == Note_head::static_name() &&
 123         stem_req_l_->duration()
 124         == info.req_l_->musical()->rhythmic()->duration()){
 125         Note_head * n_l= (Note_head*)info.elem_l_->item();
 126         stem_p_->add(n_l);
 127     }
 128 }
 129 void
 130 Stem_beam_engraver::do_pre_move_processing()
 131 {
 132     if (stem_p_) {
 133         if (default_dir_i_)
 134             stem_p_->dir_i_ = default_dir_i_;
 135
 136         typeset_element(stem_p_);
 137         stem_p_ = 0;
 138     }
 139     if (beam_p_ && end_beam_b_) {
 140         Rhythmic_grouping const * rg_C = get_staff_info().rhythmic_C_;
 141         rg_C->extend(current_grouping->interval());
 142         beam_p_->set_grouping(*rg_C, *current_grouping);
 143         beam_p_->right_col_l_ = get_staff_info().musical_pcol_l();
 144         typeset_element(beam_p_);
 145         delete current_grouping;
 146         current_grouping = 0;
 147         beam_p_ = 0;
 148     }
 149     end_beam_b_ = false;
 150 }
 151 void
 152 Stem_beam_engraver::do_post_move_processing()
 153 {
 154     stem_p_ = 0;
 155     beam_req_l_ = 0;
 156     stem_req_l_ = 0;
 157     end_beam_b_ = false;
 158 }
 159
 160 Stem_beam_engraver::~Stem_beam_engraver()
 161 {
 162     if (beam_p_)
 163         start_req_l_->warning("unterminated beam");
 164 }
 165
 166 void
 167 Stem_beam_engraver::set_feature(Feature i)
 168 {
 169     if (i.type_ == "vdir")
 170         default_dir_i_ = i.value_;
 171 }
 172
 173 IMPLEMENT_STATIC_NAME(Stem_beam_engraver);
 174 IMPLEMENT_IS_TYPE_B1(Stem_beam_engraver,Engraver);
 175 ADD_THIS_ENGRAVER(Stem_beam_engraver);