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
   9 #include "debug.hh"
  10 #include "crescendo.hh"
  11 #include "musical-request.hh"
  12 #include "lookup.hh"
  13 #include "paper-def.hh"
  14 #include "paper-column.hh"
  15 #include "staff-symbol.hh"
  16 #include "note-column.hh"
  17 #include "text-item.hh"
  18 #include "side-position-interface.hh"
  19 #include "engraver.hh"
  20 #include "stem.hh"
  21 #include "note-head.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   virtual void do_removal_processing ();
  41   virtual void acknowledge_element (Score_element_info);
  42   virtual bool do_try_music (Music *req_l);
  43   virtual void do_process_requests();
  44   virtual void do_pre_move_processing();
  45   virtual void do_post_move_processing();
  46 };
  47
  48 ADD_THIS_TRANSLATOR (Dynamic_engraver);
  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           text_p_->set_elt_property ("staff-support", SCM_BOOL_T);
 119
 120           Side_position_interface (text_p_).set_axis (Y_AXIS);
 121
 122
 123           if (absd->get_direction ())
 124             {
 125               text_p_->set_elt_property ("direction", gh_int2scm (absd->get_direction ()));
 126             }
 127
 128
 129           /*
 130             UGH UGH
 131            */
 132           SCM prop = get_property ("dynamicDirection", 0);
 133           if (!isdir_b (prop))
 134             {
 135               prop = get_property ("verticalDirection", 0);
 136             }
 137
 138           if (isdir_b (prop) && to_dir (prop))
 139             text_p_->set_elt_property ("direction", prop);
 140
 141           prop = get_property ("dynamicPadding", 0);
 142           if (gh_number_p(prop))
 143             {
 144               text_p_->set_elt_property ("padding", prop);
 145             }
 146           announce_element (Score_element_info (text_p_, absd));
 147         }
 148       else if (Span_req *span_l
 149                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 150         {
 151           if (span_l->span_dir_ == STOP)
 152             {
 153               if (!cresc_p_)
 154                 {
 155                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 156                 }
 157               else
 158                 {
 159                   assert (!to_end_cresc_p_);
 160                   to_end_cresc_p_ =cresc_p_;
 161
 162                   cresc_p_ = 0;
 163                 }
 164             }
 165           else if (span_l->span_dir_ == START)
 166             {
 167               cresc_req_l_ = span_l;
 168               assert (!new_cresc_p);
 169               new_cresc_p  = new Crescendo;
 170               new_cresc_p
 171                 ->set_elt_property ("grow-direction",
 172                                     gh_int2scm ((span_l->span_type_str_ == "crescendo") ? BIGGER : SMALLER));
 173
 174               new_cresc_p->set_elt_property ("staff-support", SCM_BOOL_T);
 175
 176
 177               Side_position_interface (new_cresc_p).set_axis (Y_AXIS);
 178               announce_element (Score_element_info (new_cresc_p, span_l));
 179             }
 180         }
 181     }
 182
 183   if (new_cresc_p)
 184     {
 185       if (cresc_p_)
 186         {
 187           ::warning (_ ("Too many crescendi here"));
 188
 189
 190           typeset_element (cresc_p_);
 191
 192           cresc_p_ = 0;
 193         }
 194
 195       cresc_p_ = new_cresc_p;
 196       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 197
 198       if (text_p_)
 199         {
 200           index_set_cell (cresc_p_->get_elt_property ("dynamic-drul"),
 201                           LEFT, SCM_BOOL_T);
 202           if (to_end_cresc_p_)
 203             index_set_cell (to_end_cresc_p_->get_elt_property ("dynamic-drul"),
 204                             RIGHT, SCM_BOOL_T);
 205         }
 206     }
 207 }
 208
 209 void
 210 Dynamic_engraver::do_pre_move_processing()
 211 {
 212   typeset_all ();
 213 }
 214
 215 void
 216 Dynamic_engraver::do_removal_processing ()
 217 {
 218   if (cresc_p_)
 219     {
 220       typeset_element (cresc_p_ );
 221       cresc_req_l_->warning (_ ("unended crescendo"));
 222       cresc_p_ =0;
 223     }
 224   typeset_all ();
 225 }
 226
 227
 228 void
 229 Dynamic_engraver::typeset_all ()
 230 {
 231   if (to_end_cresc_p_)
 232     {
 233       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 234       typeset_element (to_end_cresc_p_);
 235
 236       to_end_cresc_p_ =0;
 237
 238     }
 239
 240   if (text_p_)
 241     {
 242       typeset_element (text_p_);
 243       text_p_ =0;
 244     }
 245 }
 246
 247
 248 void
 249 Dynamic_engraver::acknowledge_element (Score_element_info i)
 250 {
 251   if (dynamic_cast<Stem *> (i.elem_l_)
 252       || dynamic_cast<Note_head *> (i.elem_l_)
 253       )
 254     {
 255       if (text_p_)
 256         Side_position_interface (text_p_).add_support (i.elem_l_);
 257
 258       if (to_end_cresc_p_)
 259         Side_position_interface (to_end_cresc_p_).add_support (i.elem_l_);
 260
 261       if (cresc_p_)
 262         Side_position_interface(cresc_p_).add_support (i.elem_l_);
 263     }
 264 }
 265