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 #include "group-interface.hh"
  22
  23 /**
  24    print text & hairpin dynamics.
  25  */
  26 class Dynamic_engraver : public Engraver
  27 {
  28   Text_item * text_p_;
  29   Crescendo * to_end_cresc_p_;
  30   Crescendo * cresc_p_;
  31
  32   Span_req * cresc_req_l_;
  33   Array<Request*> dynamic_req_l_arr_;
  34   void  typeset_all ();
  35 public:
  36   VIRTUAL_COPY_CONS(Translator);
  37   Dynamic_engraver();
  38
  39 protected:
  40
  41   void announce_element (Score_element_info);
  42
  43   virtual void do_removal_processing ();
  44   virtual void acknowledge_element (Score_element_info);
  45   virtual bool do_try_music (Music *req_l);
  46   virtual void do_process_requests();
  47   virtual void do_pre_move_processing();
  48   virtual void do_post_move_processing();
  49   virtual void typeset_element (Score_element*);
  50 };
  51
  52 void
  53 Dynamic_engraver::announce_element (Score_element_info i)
  54 {
  55   group (i.elem_l_, "interfaces").add_thing (ly_symbol2scm ("dynamic"));
  56
  57   Engraver::announce_element (i);
  58 }
  59
  60
  61 Dynamic_engraver::Dynamic_engraver()
  62 {
  63   do_post_move_processing();
  64   text_p_ =0;
  65
  66   to_end_cresc_p_ = cresc_p_ = 0;
  67
  68   cresc_req_l_ = 0;
  69 }
  70
  71 void
  72 Dynamic_engraver::do_post_move_processing()
  73 {
  74   dynamic_req_l_arr_.clear();
  75 }
  76
  77 bool
  78 Dynamic_engraver::do_try_music (Music * m)
  79 {
  80   Request * r = dynamic_cast<Request*> (m);
  81
  82   if(Text_script_req * d = dynamic_cast <Text_script_req *> (r))
  83     {
  84       if (d->style_str_ != "dynamic")
  85         return false;
  86     }
  87   else if (Span_req * s =  dynamic_cast <Span_req*> (r))
  88     {
  89       if (s-> span_type_str_ != "crescendo"
  90           && s->span_type_str_ != "decrescendo")
  91         return false;
  92     }
  93   else
  94     return false;
  95
  96   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  97     if (r->equal_b (dynamic_req_l_arr_[i]))
  98       return true;
  99
 100   dynamic_req_l_arr_.push (r);
 101   return true;
 102 }
 103
 104
 105 void
 106 Dynamic_engraver::do_process_requests()
 107 {
 108   Crescendo*  new_cresc_p=0;
 109
 110   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
 111     {
 112       if (Text_script_req *absd =
 113           dynamic_cast<Text_script_req *> ( dynamic_req_l_arr_[i]))
 114         {
 115           if (text_p_)
 116             {
 117               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused."));
 118               continue;
 119             }
 120
 121           String loud = absd->text_str_;
 122
 123           text_p_ = new Text_item;
 124           text_p_->set_elt_property ("text",
 125                                      ly_str02scm (loud.ch_C()));
 126           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 127           text_p_->set_elt_property ("script-priority",
 128                                      gh_int2scm (100));
 129
 130           Side_position_interface (text_p_).set_axis (Y_AXIS);
 131
 132
 133           if (absd->get_direction ())
 134             {
 135               text_p_->set_elt_property ("direction", gh_int2scm (absd->get_direction ()));
 136             }
 137
 138
 139           /*
 140             UGH UGH
 141            */
 142           SCM prop = get_property ("dynamicDirection");
 143           if (!isdir_b (prop))
 144             {
 145               prop = get_property ("verticalDirection");
 146             }
 147
 148           if (isdir_b (prop) && to_dir (prop))
 149             text_p_->set_elt_property ("direction", prop);
 150
 151           prop = get_property ("dynamicPadding");
 152           if (gh_number_p(prop))
 153             {
 154               text_p_->set_elt_property ("padding", prop);
 155             }
 156           announce_element (Score_element_info (text_p_, absd));
 157         }
 158       else if (Span_req *span_l
 159                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 160         {
 161           if (span_l->span_dir_ == STOP)
 162             {
 163               if (!cresc_p_)
 164                 {
 165                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 166                 }
 167               else
 168                 {
 169                   assert (!to_end_cresc_p_);
 170                   to_end_cresc_p_ =cresc_p_;
 171
 172                   cresc_p_ = 0;
 173                 }
 174             }
 175           else if (span_l->span_dir_ == START)
 176             {
 177               cresc_req_l_ = span_l;
 178               assert (!new_cresc_p);
 179               new_cresc_p  = new Crescendo;
 180               new_cresc_p
 181                 ->set_elt_property ("grow-direction",
 182                                     gh_int2scm ((span_l->span_type_str_ == "crescendo") ? BIGGER : SMALLER));
 183
 184               side_position (new_cresc_p).set_axis (Y_AXIS);
 185               announce_element (Score_element_info (new_cresc_p, span_l));
 186             }
 187         }
 188     }
 189
 190   if (new_cresc_p)
 191     {
 192       if (cresc_p_)
 193         {
 194           ::warning (_ ("Too many crescendi here"));
 195
 196           typeset_element (cresc_p_);
 197
 198           cresc_p_ = 0;
 199         }
 200
 201       cresc_p_ = new_cresc_p;
 202       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 203
 204       if (text_p_)
 205         {
 206           index_set_cell (cresc_p_->get_elt_property ("dynamic-drul"),
 207                           LEFT, SCM_BOOL_T);
 208           if (to_end_cresc_p_)
 209             index_set_cell (to_end_cresc_p_->get_elt_property ("dynamic-drul"),
 210                             RIGHT, SCM_BOOL_T);
 211         }
 212     }
 213 }
 214
 215 void
 216 Dynamic_engraver::do_pre_move_processing()
 217 {
 218   typeset_all ();
 219 }
 220
 221
 222
 223 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 224
 225 void
 226 Dynamic_engraver::do_removal_processing ()
 227 {
 228   if (cresc_p_)
 229     {
 230       typeset_element (cresc_p_ );
 231       cresc_req_l_->warning (_ ("unended crescendo"));
 232       cresc_p_ =0;
 233     }
 234   typeset_all ();
 235 }
 236
 237
 238 void
 239 Dynamic_engraver::typeset_all ()
 240 {
 241   if (to_end_cresc_p_)
 242     {
 243       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 244       typeset_element (to_end_cresc_p_);
 245
 246       to_end_cresc_p_ =0;
 247
 248     }
 249
 250   if (text_p_)
 251     {
 252       typeset_element (text_p_);
 253       text_p_ =0;
 254     }
 255 }
 256
 257 void
 258 Dynamic_engraver::typeset_element (Score_element * e)
 259 {
 260   side_position(e).add_staff_support ();
 261   Engraver::typeset_element (e);
 262 }
 263
 264 void
 265 Dynamic_engraver::acknowledge_element (Score_element_info i)
 266 {
 267   if (dynamic_cast<Stem *> (i.elem_l_)
 268       || dynamic_cast<Note_head *> (i.elem_l_)
 269       )
 270     {
 271       if (text_p_)
 272         Side_position_interface (text_p_).add_support (i.elem_l_);
 273
 274       if (to_end_cresc_p_)
 275         Side_position_interface (to_end_cresc_p_).add_support (i.elem_l_);
 276
 277       if (cresc_p_)
 278         Side_position_interface(cresc_p_).add_support (i.elem_l_);
 279     }
 280 }
 281