lily/dynamic-grav.cc

   1 /*
   2   dynamic-reg.cc -- implement Dynamic_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8 #include "debug.hh"
   9 #include "crescendo.hh"
  10 #include "dynamic-grav.hh"
  11 #include "musical-request.hh"
  12 #include "text-item.hh"
  13 #include "lookup.hh"
  14 #include "paper-def.hh"
  15 #include "score-column.hh"
  16 #include "staff-sym.hh"
  17 #include "note-column.hh"
  18
  19 Dynamic_engraver::Dynamic_engraver()
  20 {
  21   do_post_move_processing();
  22   dir_ = CENTER;
  23   dynamic_p_ =0;
  24   to_end_cresc_p_ = cresc_p_ = 0;
  25   cresc_req_l_ = 0;
  26 }
  27
  28 void
  29 Dynamic_engraver::do_post_move_processing()
  30 {
  31   dynamic_req_l_arr_.clear();
  32 }
  33
  34 bool
  35 Dynamic_engraver::do_try_request (Request * r)
  36 {
  37   Musical_req * m = r->musical();
  38   if (!m)
  39     return false;
  40   Dynamic_req * d = m->dynamic ();
  41   if (!d)
  42     return false;
  43
  44   if (cresc_p_ && d->span_dynamic ()
  45       && d->span_dynamic ()->spantype == Span_req::START)
  46     return false;
  47
  48   dynamic_req_l_arr_.push (m->dynamic());
  49   return true;
  50 }
  51 void
  52 Dynamic_engraver::do_process_requests()
  53 {
  54   Crescendo*  new_cresc_p=0;
  55   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  56     {
  57       Dynamic_req *dreq_l = dynamic_req_l_arr_[i];
  58       if (dreq_l->absdynamic())
  59         {
  60           Text_def * td_p = new Text_def;
  61           td_p->align_i_ = CENTER;
  62           String loud = dreq_l->absdynamic()->loudness_str ();
  63           td_p->text_str_ = paper()->lookup_l ()->dynamic (loud).tex_;
  64           td_p->style_str_ = "dynamic";
  65
  66           assert (!dynamic_p_) ; // TODO
  67
  68           dynamic_p_ = new Text_item (td_p);
  69           announce_element (Score_elem_info (dynamic_p_, dreq_l));
  70         }
  71       else if (dreq_l->span_dynamic())
  72         {
  73
  74           Span_dynamic_req* span_l = dreq_l->span_dynamic();
  75           if (span_l->spantype == Span_req::STOP)
  76             {
  77               if (!cresc_p_)
  78                 {
  79                   span_l->warning (_("Can't find cresc to end "));
  80                 }
  81               else
  82                 {
  83                   assert (!to_end_cresc_p_);
  84                   to_end_cresc_p_ =cresc_p_;
  85                   cresc_p_ = 0;
  86                 }
  87             }
  88           else if (span_l->spantype == Span_req::START)
  89             {
  90               cresc_req_l_ = span_l;
  91               assert (!new_cresc_p);
  92               new_cresc_p  = new Crescendo;
  93               new_cresc_p->grow_dir_ = span_l->dynamic_dir_;
  94               announce_element (Score_elem_info (new_cresc_p, span_l));
  95             }
  96         }
  97     }
  98
  99   if (new_cresc_p)
 100     {
 101       cresc_p_ = new_cresc_p;
 102       cresc_p_->set_bounds(LEFT,get_staff_info().musical_l ());
 103       if (dynamic_p_)
 104         {
 105           cresc_p_->dyn_b_drul_[LEFT] = true;
 106         }
 107     }
 108 }
 109
 110 void
 111 Dynamic_engraver::do_pre_move_processing()
 112 {
 113   Staff_symbol* s_l = get_staff_info().staff_sym_l_;
 114   if (to_end_cresc_p_)
 115     {
 116       if (dynamic_p_)
 117         to_end_cresc_p_->dyn_b_drul_[RIGHT]=true;
 118
 119       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_l ());
 120       to_end_cresc_p_->add_support (s_l);
 121       typeset_element (to_end_cresc_p_);
 122       to_end_cresc_p_ = 0;
 123     }
 124   if (dynamic_p_)
 125     {
 126
 127       dynamic_p_->add_support (s_l);
 128       typeset_element (dynamic_p_);
 129       dynamic_p_ = 0;
 130     }
 131 }
 132
 133
 134 IMPLEMENT_IS_TYPE_B1(Dynamic_engraver,Engraver);
 135 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 136
 137 void
 138 Dynamic_engraver::do_removal_processing ()
 139 {
 140   if (cresc_p_)
 141     {
 142       typeset_element (cresc_p_ );
 143
 144       cresc_req_l_->warning (_("unended crescendo"));
 145       cresc_p_ =0;
 146     }
 147   if (to_end_cresc_p_)
 148     {
 149       typeset_element (to_end_cresc_p_);
 150       to_end_cresc_p_ =0;
 151     }
 152   if (dynamic_p_)
 153     {
 154       typeset_element (dynamic_p_);
 155       dynamic_p_ =0;
 156     }
 157 }
 158
 159 void
 160 Dynamic_engraver::acknowledge_element (Score_elem_info i)
 161 {
 162   if (i.elem_l_->is_type_b (Note_column::static_name ()))
 163     {
 164       if (dynamic_p_) dynamic_p_->add_support (i.elem_l_);
 165       if (to_end_cresc_p_)
 166         to_end_cresc_p_->add_support (i.elem_l_);
 167       if (cresc_p_)
 168         cresc_p_->add_support (i.elem_l_);
 169     }
 170 }