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_request (Request * r)
  36 {
  37   Musical_req * m = dynamic_cast <Musical_req *> (r);
  38   if (!m)
  39     return false;
  40   Dynamic_req * d = dynamic_cast <Dynamic_req *> (m);
  41   if (!d)
  42     return false;
  43
  44 #if 0
  45   if (cresc_p_ && dynamic_cast <Span_dynamic_req *> (d)
  46       && dynamic_cast <Span_dynamic_req *> (d)->spantype == Span_req::START)
  47     return false;
  48 #endif
  49   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  50     if (d->equal_b (dynamic_req_l_arr_[i]))
  51       return true;
  52
  53   dynamic_req_l_arr_.push (dynamic_cast <Dynamic_req *> (m));
  54   return true;
  55 }
  56 void
  57 Dynamic_engraver::do_process_requests()
  58 {
  59   Crescendo*  new_cresc_p=0;
  60   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  61     {
  62       Dynamic_req *dreq_l = dynamic_req_l_arr_[i];
  63       if (dynamic_cast <Absolute_dynamic_req *> (dreq_l))
  64         {
  65
  66           if (dynamic_p_)
  67             {
  68               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused"));
  69               continue;
  70             }
  71
  72           Text_def * td_p = new Text_def;
  73           td_p->align_dir_ = CENTER;
  74           String loud = dynamic_cast <Absolute_dynamic_req *> (dreq_l)->loudness_str ();
  75           td_p->text_str_ = paper ()->lookup_l (0)->dynamic (loud).str_;
  76           td_p->style_str_ = "dynamic";
  77
  78
  79
  80           dynamic_p_ = new Text_item (td_p);
  81           announce_element (Score_element_info (dynamic_p_, dreq_l));
  82         }
  83       else if (dynamic_cast <Span_dynamic_req *> (dreq_l))
  84         {
  85           Span_dynamic_req* span_l = dynamic_cast <Span_dynamic_req *> (dreq_l);
  86           if (span_l->spantype == Span_req::STOP)
  87             {
  88               if (!cresc_p_)
  89                 {
  90                   span_l->warning (_ ("can't find (de)crescendo to end"));
  91                 }
  92               else
  93                 {
  94                   assert (!to_end_cresc_p_);
  95                   to_end_cresc_p_ =cresc_p_;
  96                   cresc_p_ = 0;
  97                 }
  98             }
  99           else if (span_l->spantype == Span_req::START)
 100             {
 101               cresc_req_l_ = span_l;
 102               assert (!new_cresc_p);
 103               new_cresc_p  = new Crescendo;
 104               new_cresc_p->grow_dir_ = span_l->dynamic_dir_;
 105               announce_element (Score_element_info (new_cresc_p, span_l));
 106             }
 107         }
 108     }
 109
 110   if (new_cresc_p)
 111     {
 112       if (cresc_p_)
 113         {
 114           ::warning (_ ("Too many crescendi here"));
 115           typeset_element (cresc_p_);
 116           cresc_p_ = 0;
 117         }
 118
 119       cresc_p_ = new_cresc_p;
 120       cresc_p_->set_bounds(LEFT,get_staff_info().musical_l ());
 121       if (dynamic_p_)
 122         {
 123           cresc_p_->dyn_b_drul_[LEFT] = true;
 124         }
 125     }
 126 }
 127
 128 void
 129 Dynamic_engraver::do_pre_move_processing()
 130 {
 131   Staff_symbol* s_l = get_staff_info().staff_sym_l_;
 132   if (to_end_cresc_p_)
 133     {
 134       if (dynamic_p_)
 135         to_end_cresc_p_->dyn_b_drul_[RIGHT]=true;
 136
 137
 138       Scalar prop = get_property ("dynamicdir");
 139       if (prop.isnum_b ())
 140        {
 141          to_end_cresc_p_->dir_ = (Direction) (int) prop;
 142        }
 143       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_l ());
 144       to_end_cresc_p_->add_support (s_l);
 145       typeset_element (to_end_cresc_p_);
 146       to_end_cresc_p_ = 0;
 147     }
 148   if (dynamic_p_)
 149     {
 150       Scalar prop = get_property ("dynamicdir");
 151       if (prop.isnum_b ())
 152        {
 153          dynamic_p_->dir_ = (Direction) (int) prop;
 154        }
 155
 156       dynamic_p_->add_support (s_l);
 157       typeset_element (dynamic_p_);
 158       dynamic_p_ = 0;
 159     }
 160 }
 161
 162
 163 IMPLEMENT_IS_TYPE_B1(Dynamic_engraver,Engraver);
 164 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 165
 166 void
 167 Dynamic_engraver::do_removal_processing ()
 168 {
 169   if (cresc_p_)
 170     {
 171       typeset_element (cresc_p_ );
 172
 173       cresc_req_l_->warning (_ ("unended crescendo"));
 174       cresc_p_ =0;
 175     }
 176   if (to_end_cresc_p_)
 177     {
 178       typeset_element (to_end_cresc_p_);
 179       to_end_cresc_p_ =0;
 180     }
 181   if (dynamic_p_)
 182     {
 183       typeset_element (dynamic_p_);
 184       dynamic_p_ =0;
 185     }
 186 }
 187
 188 void
 189 Dynamic_engraver::acknowledge_element (Score_element_info i)
 190 {
 191   if (i.elem_l_->is_type_b (Note_column::static_name ()))
 192     {
 193       if (dynamic_p_)
 194         dynamic_p_->add_support (i.elem_l_);
 195
 196       if (to_end_cresc_p_)
 197         to_end_cresc_p_->add_support (i.elem_l_);
 198
 199       if (cresc_p_)
 200         cresc_p_->add_support (i.elem_l_);
 201     }
 202 }