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--1999 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 };
  46
  47
  48
  49 Dynamic_engraver::Dynamic_engraver()
  50 {
  51   do_post_move_processing();
  52   text_p_ =0;
  53
  54   to_end_cresc_p_ = cresc_p_ = 0;
  55
  56   cresc_req_l_ = 0;
  57 }
  58
  59 void
  60 Dynamic_engraver::do_post_move_processing()
  61 {
  62   dynamic_req_l_arr_.clear();
  63 }
  64
  65 bool
  66 Dynamic_engraver::do_try_music (Music * m)
  67 {
  68   Request * r = dynamic_cast<Request*> (m);
  69
  70   if(Text_script_req * d = dynamic_cast <Text_script_req *> (r))
  71     {
  72       if (d->style_str_ != "dynamic")
  73         return false;
  74     }
  75   else if (Span_req * s =  dynamic_cast <Span_req*> (r))
  76     {
  77       if (s-> span_type_str_ != "crescendo"
  78           && s->span_type_str_ != "decrescendo")
  79         return false;
  80     }
  81   else
  82     return false;
  83
  84   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  85     if (r->equal_b (dynamic_req_l_arr_[i]))
  86       return true;
  87
  88   dynamic_req_l_arr_.push (r);
  89   return true;
  90 }
  91
  92
  93 void
  94 Dynamic_engraver::do_process_requests()
  95 {
  96   Crescendo*  new_cresc_p=0;
  97
  98   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  99     {
 100       if (Text_script_req *absd =
 101           dynamic_cast<Text_script_req *> ( dynamic_req_l_arr_[i]))
 102         {
 103           if (text_p_)
 104             {
 105               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused."));
 106               continue;
 107             }
 108
 109           String loud = absd->text_str_;
 110
 111           text_p_ = new Text_item;
 112           text_p_->set_elt_property ("text",
 113                                      ly_str02scm (loud.ch_C()));
 114           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 115           text_p_->set_elt_property ("script-priority",
 116                                      gh_int2scm (100));
 117           text_p_->set_elt_property ("staff-support", SCM_BOOL_T);
 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               new_cresc_p->set_elt_property ("staff-support", SCM_BOOL_T);
 174
 175
 176               Side_position_interface (new_cresc_p).set_axis (Y_AXIS);
 177               announce_element (Score_element_info (new_cresc_p, span_l));
 178             }
 179         }
 180     }
 181
 182   if (new_cresc_p)
 183     {
 184       if (cresc_p_)
 185         {
 186           ::warning (_ ("Too many crescendi here"));
 187
 188
 189           typeset_element (cresc_p_);
 190
 191           cresc_p_ = 0;
 192         }
 193
 194       cresc_p_ = new_cresc_p;
 195       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 196
 197       if (text_p_)
 198         {
 199           index_set_cell (cresc_p_->get_elt_property ("dynamic-drul"),
 200                           LEFT, SCM_BOOL_T);
 201           if (to_end_cresc_p_)
 202             index_set_cell (to_end_cresc_p_->get_elt_property ("dynamic-drul"),
 203                             RIGHT, SCM_BOOL_T);
 204         }
 205     }
 206 }
 207
 208 void
 209 Dynamic_engraver::do_pre_move_processing()
 210 {
 211   typeset_all ();
 212 }
 213
 214
 215
 216 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 217
 218 void
 219 Dynamic_engraver::do_removal_processing ()
 220 {
 221   if (cresc_p_)
 222     {
 223       typeset_element (cresc_p_ );
 224       cresc_req_l_->warning (_ ("unended crescendo"));
 225       cresc_p_ =0;
 226     }
 227   typeset_all ();
 228 }
 229
 230
 231 void
 232 Dynamic_engraver::typeset_all ()
 233 {
 234   if (to_end_cresc_p_)
 235     {
 236       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 237       typeset_element (to_end_cresc_p_);
 238
 239       to_end_cresc_p_ =0;
 240
 241     }
 242
 243   if (text_p_)
 244     {
 245       typeset_element (text_p_);
 246       text_p_ =0;
 247     }
 248 }
 249
 250
 251 void
 252 Dynamic_engraver::acknowledge_element (Score_element_info i)
 253 {
 254   if (dynamic_cast<Stem *> (i.elem_l_)
 255       || dynamic_cast<Note_head *> (i.elem_l_)
 256       )
 257     {
 258       if (text_p_)
 259         Side_position_interface (text_p_).add_support (i.elem_l_);
 260
 261       if (to_end_cresc_p_)
 262         Side_position_interface (to_end_cresc_p_).add_support (i.elem_l_);
 263
 264       if (cresc_p_)
 265         Side_position_interface(cresc_p_).add_support (i.elem_l_);
 266     }
 267 }
 268