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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "debug.hh"
   9 #include "crescendo.hh"
  10 #include "musical-request.hh"
  11 #include "lookup.hh"
  12 #include "paper-def.hh"
  13 #include "paper-column.hh"
  14 #include "staff-symbol.hh"
  15 #include "note-column.hh"
  16 #include "text-item.hh"
  17 #include "side-position-interface.hh"
  18 #include "engraver.hh"
  19 #include "stem.hh"
  20 #include "note-head.hh"
  21
  22 /**
  23    print text & hairpin dynamics.
  24  */
  25 class Dynamic_engraver : public Engraver
  26 {
  27   Text_item * text_p_;
  28   Crescendo * to_end_cresc_p_;
  29   Crescendo * cresc_p_;
  30
  31   Span_req * cresc_req_l_;
  32   Array<Request*> dynamic_req_l_arr_;
  33   void  typeset_all ();
  34 public:
  35   VIRTUAL_COPY_CONS(Translator);
  36   Dynamic_engraver();
  37
  38 protected:
  39   virtual void do_removal_processing ();
  40   virtual void acknowledge_element (Score_element_info);
  41   virtual bool do_try_music (Music *req_l);
  42   virtual void do_process_requests();
  43   virtual void do_pre_move_processing();
  44   virtual void do_post_move_processing();
  45   virtual void typeset_element (Score_element*);
  46 };
  47
  48
  49
  50 Dynamic_engraver::Dynamic_engraver()
  51 {
  52   do_post_move_processing();
  53   text_p_ =0;
  54
  55   to_end_cresc_p_ = cresc_p_ = 0;
  56
  57   cresc_req_l_ = 0;
  58 }
  59
  60 void
  61 Dynamic_engraver::do_post_move_processing()
  62 {
  63   dynamic_req_l_arr_.clear();
  64 }
  65
  66 bool
  67 Dynamic_engraver::do_try_music (Music * m)
  68 {
  69   Request * r = dynamic_cast<Request*> (m);
  70
  71   if(Text_script_req * d = dynamic_cast <Text_script_req *> (r))
  72     {
  73       if (d->style_str_ != "dynamic")
  74         return false;
  75     }
  76   else if (Span_req * s =  dynamic_cast <Span_req*> (r))
  77     {
  78       if (s-> span_type_str_ != "crescendo"
  79           && s->span_type_str_ != "decrescendo")
  80         return false;
  81     }
  82   else
  83     return false;
  84
  85   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  86     if (r->equal_b (dynamic_req_l_arr_[i]))
  87       return true;
  88
  89   dynamic_req_l_arr_.push (r);
  90   return true;
  91 }
  92
  93
  94 void
  95 Dynamic_engraver::do_process_requests()
  96 {
  97   Crescendo*  new_cresc_p=0;
  98
  99   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
 100     {
 101       if (Text_script_req *absd =
 102           dynamic_cast<Text_script_req *> ( dynamic_req_l_arr_[i]))
 103         {
 104           if (text_p_)
 105             {
 106               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused."));
 107               continue;
 108             }
 109
 110           String loud = absd->text_str_;
 111
 112           text_p_ = new Text_item;
 113           text_p_->set_elt_property ("text",
 114                                      ly_str02scm (loud.ch_C()));
 115           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 116           text_p_->set_elt_property ("script-priority",
 117                                      gh_int2scm (100));
 118
 119           Side_position_interface (text_p_).set_axis (Y_AXIS);
 120
 121
 122           if (absd->get_direction ())
 123             {
 124               text_p_->set_elt_property ("direction", gh_int2scm (absd->get_direction ()));
 125             }
 126
 127
 128           /*
 129             UGH UGH
 130            */
 131           SCM prop = get_property ("dynamicDirection", 0);
 132           if (!isdir_b (prop))
 133             {
 134               prop = get_property ("verticalDirection", 0);
 135             }
 136
 137           if (isdir_b (prop) && to_dir (prop))
 138             text_p_->set_elt_property ("direction", prop);
 139
 140           prop = get_property ("dynamicPadding", 0);
 141           if (gh_number_p(prop))
 142             {
 143               text_p_->set_elt_property ("padding", prop);
 144             }
 145           announce_element (Score_element_info (text_p_, absd));
 146         }
 147       else if (Span_req *span_l
 148                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 149         {
 150           if (span_l->span_dir_ == STOP)
 151             {
 152               if (!cresc_p_)
 153                 {
 154                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 155                 }
 156               else
 157                 {
 158                   assert (!to_end_cresc_p_);
 159                   to_end_cresc_p_ =cresc_p_;
 160
 161                   cresc_p_ = 0;
 162                 }
 163             }
 164           else if (span_l->span_dir_ == START)
 165             {
 166               cresc_req_l_ = span_l;
 167               assert (!new_cresc_p);
 168               new_cresc_p  = new Crescendo;
 169               new_cresc_p
 170                 ->set_elt_property ("grow-direction",
 171                                     gh_int2scm ((span_l->span_type_str_ == "crescendo") ? BIGGER : SMALLER));
 172
 173               side_position (new_cresc_p).set_axis (Y_AXIS);
 174               announce_element (Score_element_info (new_cresc_p, span_l));
 175             }
 176         }
 177     }
 178
 179   if (new_cresc_p)
 180     {
 181       if (cresc_p_)
 182         {
 183           ::warning (_ ("Too many crescendi here"));
 184
 185           typeset_element (cresc_p_);
 186
 187           cresc_p_ = 0;
 188         }
 189
 190       cresc_p_ = new_cresc_p;
 191       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 192
 193       if (text_p_)
 194         {
 195           index_set_cell (cresc_p_->get_elt_property ("dynamic-drul"),
 196                           LEFT, SCM_BOOL_T);
 197           if (to_end_cresc_p_)
 198             index_set_cell (to_end_cresc_p_->get_elt_property ("dynamic-drul"),
 199                             RIGHT, SCM_BOOL_T);
 200         }
 201     }
 202 }
 203
 204 void
 205 Dynamic_engraver::do_pre_move_processing()
 206 {
 207   typeset_all ();
 208 }
 209
 210
 211
 212 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 213
 214 void
 215 Dynamic_engraver::do_removal_processing ()
 216 {
 217   if (cresc_p_)
 218     {
 219       typeset_element (cresc_p_ );
 220       cresc_req_l_->warning (_ ("unended crescendo"));
 221       cresc_p_ =0;
 222     }
 223   typeset_all ();
 224 }
 225
 226
 227 void
 228 Dynamic_engraver::typeset_all ()
 229 {
 230   if (to_end_cresc_p_)
 231     {
 232       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 233       typeset_element (to_end_cresc_p_);
 234
 235       to_end_cresc_p_ =0;
 236
 237     }
 238
 239   if (text_p_)
 240     {
 241       typeset_element (text_p_);
 242       text_p_ =0;
 243     }
 244 }
 245
 246 void
 247 Dynamic_engraver::typeset_element (Score_element * e)
 248 {
 249   side_position(e).add_staff_support ();
 250   Engraver::typeset_element (e);
 251 }
 252
 253 void
 254 Dynamic_engraver::acknowledge_element (Score_element_info i)
 255 {
 256   if (dynamic_cast<Stem *> (i.elem_l_)
 257       || dynamic_cast<Note_head *> (i.elem_l_)
 258       )
 259     {
 260       if (text_p_)
 261         Side_position_interface (text_p_).add_support (i.elem_l_);
 262
 263       if (to_end_cresc_p_)
 264         Side_position_interface (to_end_cresc_p_).add_support (i.elem_l_);
 265
 266       if (cresc_p_)
 267         Side_position_interface(cresc_p_).add_support (i.elem_l_);
 268     }
 269 }
 270