lily/dynamic-engraver.cc

   1 /*
   2   dynamic-reg.cc -- implement Dynamic_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "debug.hh"
   9 #include "crescendo.hh"
  10 #include "dynamic-engraver.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_music (Music * r)
  36 {
  37   if(Dynamic_req * d = dynamic_cast <Dynamic_req *> (r))
  38     {
  39       for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  40         if (d->equal_b (dynamic_req_l_arr_[i]))
  41           return true;
  42
  43       dynamic_req_l_arr_.push (d);
  44       return true;
  45     }
  46   return false;
  47 }
  48 void
  49 Dynamic_engraver::do_process_requests()
  50 {
  51   Crescendo*  new_cresc_p=0;
  52   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  53     {
  54       Dynamic_req *dreq_l = dynamic_req_l_arr_[i];
  55       if (Absolute_dynamic_req *absd = dynamic_cast<Absolute_dynamic_req *> (dreq_l))
  56         {
  57
  58           if (dynamic_p_)
  59             {
  60               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused"));
  61               continue;
  62             }
  63
  64           Text_def * td_p = new Text_def;
  65           String loud = absd->loudness_str ();
  66           td_p->text_str_ =  paper ()->lookup_l (0)->dynamic (loud).str_; // ugh
  67           td_p->style_str_ = "dynamic";
  68           td_p->align_dir_ = RIGHT;
  69           Real nw_f = paper ()->note_width () * 0.8;
  70
  71           dynamic_p_ = new Text_item (td_p);
  72           dynamic_p_->translate (Offset (nw_f, 0));
  73
  74           announce_element (Score_element_info (dynamic_p_, dreq_l));
  75         }
  76       else if (Span_dynamic_req *span_l = dynamic_cast <Span_dynamic_req *> (dreq_l))
  77         {
  78           if (span_l->spantype == Span_req::STOP)
  79             {
  80               if (!cresc_p_)
  81                 {
  82                   span_l->warning (_ ("can't find (de)crescendo to end"));
  83                 }
  84               else
  85                 {
  86                   assert (!to_end_cresc_p_);
  87                   to_end_cresc_p_ =cresc_p_;
  88                   cresc_p_ = 0;
  89                 }
  90             }
  91           else if (span_l->spantype == Span_req::START)
  92             {
  93               cresc_req_l_ = span_l;
  94               assert (!new_cresc_p);
  95               new_cresc_p  = new Crescendo;
  96               new_cresc_p->grow_dir_ = span_l->dynamic_dir_;
  97               announce_element (Score_element_info (new_cresc_p, span_l));
  98             }
  99         }
 100     }
 101
 102   if (new_cresc_p)
 103     {
 104       if (cresc_p_)
 105         {
 106           ::warning (_ ("Too many crescendi here"));
 107           typeset_element (cresc_p_);
 108           cresc_p_ = 0;
 109         }
 110
 111       cresc_p_ = new_cresc_p;
 112       cresc_p_->set_bounds(LEFT,get_staff_info().musical_l ());
 113       if (dynamic_p_)
 114         {
 115           cresc_p_->dyn_b_drul_[LEFT] = true;
 116         }
 117     }
 118 }
 119
 120 void
 121 Dynamic_engraver::do_pre_move_processing()
 122 {
 123   Staff_symbol* s_l = get_staff_info().staff_sym_l_;
 124   if (to_end_cresc_p_)
 125     {
 126       if (dynamic_p_)
 127         to_end_cresc_p_->dyn_b_drul_[RIGHT]=true;
 128
 129
 130       Scalar prop = get_property ("dynamicdir");
 131       if (prop.isnum_b ())
 132        {
 133          to_end_cresc_p_->dir_ = (Direction) (int) prop;
 134        }
 135       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_l ());
 136       to_end_cresc_p_->add_support (s_l);
 137       typeset_element (to_end_cresc_p_);
 138       to_end_cresc_p_ = 0;
 139     }
 140   if (dynamic_p_)
 141     {
 142       Scalar prop = get_property ("dynamicdir");
 143       if (prop.isnum_b ())
 144        {
 145          dynamic_p_->dir_ = (Direction) (int) prop;
 146        }
 147
 148       dynamic_p_->add_support (s_l);
 149       typeset_element (dynamic_p_);
 150       dynamic_p_ = 0;
 151     }
 152 }
 153
 154
 155
 156 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 157
 158 void
 159 Dynamic_engraver::do_removal_processing ()
 160 {
 161   if (cresc_p_)
 162     {
 163       typeset_element (cresc_p_ );
 164
 165       cresc_req_l_->warning (_ ("unended crescendo"));
 166       cresc_p_ =0;
 167     }
 168   if (to_end_cresc_p_)
 169     {
 170       typeset_element (to_end_cresc_p_);
 171       to_end_cresc_p_ =0;
 172     }
 173   if (dynamic_p_)
 174     {
 175       typeset_element (dynamic_p_);
 176       dynamic_p_ =0;
 177     }
 178 }
 179
 180 void
 181 Dynamic_engraver::acknowledge_element (Score_element_info i)
 182 {
 183   if (dynamic_cast<Note_column *> (i.elem_l_))
 184     {
 185       if (dynamic_p_)
 186         dynamic_p_->add_support (i.elem_l_);
 187
 188       if (to_end_cresc_p_)
 189         to_end_cresc_p_->add_support (i.elem_l_);
 190
 191       if (cresc_p_)
 192         cresc_p_->add_support (i.elem_l_);
 193     }
 194 }