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 "score-column.hh"
  14 #include "staff-symbol.hh"
  15 #include "note-column.hh"
  16 #include "text-item.hh"
  17 #include "staff-side.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   Staff_side_item * staff_side_p_;
  29   Staff_side_spanner * ss_span_p_;
  30   Staff_side_spanner * to_end_ss_span_p_;
  31
  32
  33   Crescendo * to_end_cresc_p_;
  34   Crescendo * cresc_p_;
  35   Span_req * cresc_req_l_;
  36   Array<Request*> dynamic_req_l_arr_;
  37   void  typeset_all ();
  38 public:
  39   VIRTUAL_COPY_CONS(Translator);
  40   Dynamic_engraver();
  41
  42 protected:
  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 };
  50
  51
  52
  53 Dynamic_engraver::Dynamic_engraver()
  54 {
  55   do_post_move_processing();
  56   text_p_ =0;
  57   staff_side_p_ =0;
  58   to_end_cresc_p_ = cresc_p_ = 0;
  59   ss_span_p_ = to_end_ss_span_p_=0;
  60   cresc_req_l_ = 0;
  61 }
  62
  63 void
  64 Dynamic_engraver::do_post_move_processing()
  65 {
  66   dynamic_req_l_arr_.clear();
  67 }
  68
  69 bool
  70 Dynamic_engraver::do_try_music (Music * m)
  71 {
  72   Request * r = dynamic_cast<Request*> (m);
  73
  74   if(Text_script_req * d = dynamic_cast <Text_script_req *> (r))
  75     {
  76       if (d->style_str_ != "dynamic")
  77         return false;
  78     }
  79   else if (Span_req * s =  dynamic_cast <Span_req*> (r))
  80     {
  81       if (s-> span_type_str_ != "crescendo"
  82           && s->span_type_str_ != "decrescendo")
  83         return false;
  84     }
  85   else
  86     return false;
  87
  88   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  89     if (r->equal_b (dynamic_req_l_arr_[i]))
  90       return true;
  91
  92   dynamic_req_l_arr_.push (r);
  93   return true;
  94 }
  95
  96
  97 void
  98 Dynamic_engraver::do_process_requests()
  99 {
 100   Crescendo*  new_cresc_p=0;
 101   Staff_side_spanner * new_sss_p =0;
 102   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
 103     {
 104       if (Text_script_req *absd =
 105           dynamic_cast<Text_script_req *> ( dynamic_req_l_arr_[i]))
 106         {
 107           if (text_p_)
 108             {
 109               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused."));
 110               continue;
 111             }
 112
 113           String loud = absd->text_str_;
 114
 115           text_p_ = new Text_item;
 116           text_p_->text_str_ =  loud; // ugh
 117           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 118
 119           staff_side_p_ = new Staff_side_item;
 120           staff_side_p_->set_elt_property ("script-priority",
 121                                            gh_int2scm (100));
 122
 123           staff_side_p_->set_victim (text_p_);
 124           staff_side_p_->axis_ = Y_AXIS;
 125           staff_side_p_->set_direction (DOWN);
 126
 127
 128           SCM prop = get_property ("verticalDirection", 0);
 129           if (isdir_b (prop))
 130             {
 131               staff_side_p_->set_direction (to_dir (prop));
 132             }
 133
 134           prop = get_property ("dynamicDirection", 0);
 135           if (gh_number_p(prop))
 136             {
 137               staff_side_p_->set_direction (to_dir (prop));
 138             }
 139           if (absd->get_direction ())
 140             {
 141               staff_side_p_->set_direction (absd->get_direction ());
 142             }
 143
 144           prop = get_property ("dynamicPadding", 0);
 145           if (gh_number_p(prop))
 146             {
 147               staff_side_p_->set_elt_property ("padding", prop);
 148             }
 149           announce_element (Score_element_info (text_p_, absd));
 150           announce_element (Score_element_info (staff_side_p_, absd));
 151         }
 152       else if (Span_req *span_l
 153                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 154         {
 155           if (span_l->span_dir_ == STOP)
 156             {
 157               if (!cresc_p_)
 158                 {
 159                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 160                 }
 161               else
 162                 {
 163                   assert (!to_end_cresc_p_);
 164                   to_end_cresc_p_ =cresc_p_;
 165                   to_end_ss_span_p_ = ss_span_p_ ;
 166
 167                   cresc_p_ = 0;
 168                   ss_span_p_ =0;
 169
 170
 171
 172
 173                   SCM prop = get_property ("verticalDirection", 0);
 174                   if (isdir_b (prop))
 175                     {
 176                       to_end_ss_span_p_->set_direction (to_dir (prop));
 177                     }
 178                   prop = get_property ("dynamicDirection", 0);
 179                   if (isdir_b (prop))
 180                     {
 181                       to_end_ss_span_p_->set_direction (to_dir (prop));
 182                     }
 183                   prop = get_property ("dynamicPadding", 0);
 184                   if (gh_number_p(prop))
 185                     {
 186                       to_end_ss_span_p_->set_elt_property ("padding",prop);
 187                     }
 188                 }
 189             }
 190           else if (span_l->span_dir_ == START)
 191             {
 192               cresc_req_l_ = span_l;
 193               assert (!new_cresc_p);
 194               new_cresc_p  = new Crescendo;
 195               new_cresc_p->grow_dir_ = (span_l->span_type_str_ == "crescendo")  ? BIGGER : SMALLER;
 196               announce_element (Score_element_info (new_cresc_p, span_l));
 197
 198               new_sss_p = new Staff_side_spanner;
 199               new_sss_p->set_victim (new_cresc_p);
 200               new_sss_p->axis_ = Y_AXIS;
 201               // UGH.!
 202               // new_sss_p->set_elt_property ("dangling", SCM_BOOL_T);
 203               announce_element (Score_element_info (new_sss_p, span_l));
 204             }
 205         }
 206     }
 207
 208   if (new_cresc_p)
 209     {
 210       if (cresc_p_)
 211         {
 212           ::warning (_ ("Too many crescendi here"));
 213           typeset_element (cresc_p_);
 214           typeset_element (ss_span_p_);
 215           cresc_p_ = 0;
 216           ss_span_p_ =0;
 217         }
 218
 219       cresc_p_ = new_cresc_p;
 220       ss_span_p_ = new_sss_p;
 221       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 222       ss_span_p_->set_bounds (LEFT,get_staff_info().musical_pcol_l ());
 223       if (text_p_)
 224         {
 225           cresc_p_->dyn_b_drul_[LEFT] = true;
 226           if (to_end_cresc_p_)
 227             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 228         }
 229     }
 230 }
 231
 232 void
 233 Dynamic_engraver::do_pre_move_processing()
 234 {
 235   typeset_all ();
 236 }
 237
 238
 239
 240 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 241
 242 void
 243 Dynamic_engraver::do_removal_processing ()
 244 {
 245   if (cresc_p_)
 246     {
 247       typeset_element (cresc_p_ );
 248       typeset_element (ss_span_p_);
 249       ss_span_p_ =0;
 250       cresc_req_l_->warning (_ ("unended crescendo"));
 251       cresc_p_ =0;
 252     }
 253   typeset_all ();
 254 }
 255
 256
 257 void
 258 Dynamic_engraver::typeset_all ()
 259 {
 260   if (to_end_cresc_p_)
 261     {
 262       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 263       to_end_ss_span_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 264       typeset_element (to_end_cresc_p_);
 265       typeset_element (to_end_ss_span_p_);
 266       to_end_cresc_p_ =0;
 267       to_end_ss_span_p_ =0;
 268     }
 269
 270   if (text_p_)
 271     {
 272       typeset_element (text_p_);
 273       typeset_element (staff_side_p_);
 274       text_p_ =0;
 275       staff_side_p_ =0;
 276     }
 277 }
 278
 279
 280 void
 281 Dynamic_engraver::acknowledge_element (Score_element_info i)
 282 {
 283   if (dynamic_cast<Stem *> (i.elem_l_)
 284       || dynamic_cast<Note_head *> (i.elem_l_)
 285       )
 286     {
 287       if (staff_side_p_)
 288         staff_side_p_->add_support (i.elem_l_);
 289
 290       if (to_end_ss_span_p_)
 291         to_end_ss_span_p_->add_support (i.elem_l_);
 292
 293       if (ss_span_p_)
 294         ss_span_p_->add_support (i.elem_l_);
 295     }
 296 }
 297