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 "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_->text_str_ =  loud; // ugh
 113           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 114           text_p_->set_elt_property ("script-priority",
 115                                      gh_int2scm (100));
 116           text_p_->set_elt_property ("staff-support", SCM_BOOL_T);
 117
 118           Side_position_interface (text_p_).set_axis (Y_AXIS);
 119
 120
 121           if (absd->get_direction ())
 122             {
 123               text_p_->set_elt_property ("direction", gh_int2scm (absd->get_direction ()));
 124             }
 125
 126
 127           /*
 128             UGH UGH
 129            */
 130           SCM prop = get_property ("dynamicDirection", 0);
 131           if (!isdir_b (prop))
 132             {
 133               prop = get_property ("verticalDirection", 0);
 134             }
 135
 136           if (isdir_b (prop) && to_dir (prop))
 137             text_p_->set_elt_property ("direction", prop);
 138
 139           prop = get_property ("dynamicPadding", 0);
 140           if (gh_number_p(prop))
 141             {
 142               text_p_->set_elt_property ("padding", prop);
 143             }
 144           announce_element (Score_element_info (text_p_, absd));
 145         }
 146       else if (Span_req *span_l
 147                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 148         {
 149           if (span_l->span_dir_ == STOP)
 150             {
 151               if (!cresc_p_)
 152                 {
 153                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 154                 }
 155               else
 156                 {
 157                   assert (!to_end_cresc_p_);
 158                   to_end_cresc_p_ =cresc_p_;
 159
 160                   cresc_p_ = 0;
 161                 }
 162             }
 163           else if (span_l->span_dir_ == START)
 164             {
 165               cresc_req_l_ = span_l;
 166               assert (!new_cresc_p);
 167               new_cresc_p  = new Crescendo;
 168               new_cresc_p->grow_dir_ = (span_l->span_type_str_ == "crescendo")  ? BIGGER : SMALLER;
 169               new_cresc_p->set_elt_property ("staff-support", SCM_BOOL_T);
 170
 171
 172               Side_position_interface (new_cresc_p).set_axis (Y_AXIS);
 173               announce_element (Score_element_info (new_cresc_p, span_l));
 174             }
 175         }
 176     }
 177
 178   if (new_cresc_p)
 179     {
 180       if (cresc_p_)
 181         {
 182           ::warning (_ ("Too many crescendi here"));
 183
 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           cresc_p_->dyn_b_drul_[LEFT] = true;
 196           if (to_end_cresc_p_)
 197             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 198         }
 199     }
 200 }
 201
 202 void
 203 Dynamic_engraver::do_pre_move_processing()
 204 {
 205   typeset_all ();
 206 }
 207
 208
 209
 210 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 211
 212 void
 213 Dynamic_engraver::do_removal_processing ()
 214 {
 215   if (cresc_p_)
 216     {
 217       typeset_element (cresc_p_ );
 218       cresc_req_l_->warning (_ ("unended crescendo"));
 219       cresc_p_ =0;
 220     }
 221   typeset_all ();
 222 }
 223
 224
 225 void
 226 Dynamic_engraver::typeset_all ()
 227 {
 228   if (to_end_cresc_p_)
 229     {
 230       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 231       typeset_element (to_end_cresc_p_);
 232
 233       to_end_cresc_p_ =0;
 234
 235     }
 236
 237   if (text_p_)
 238     {
 239       typeset_element (text_p_);
 240       text_p_ =0;
 241     }
 242 }
 243
 244
 245 void
 246 Dynamic_engraver::acknowledge_element (Score_element_info i)
 247 {
 248   if (dynamic_cast<Stem *> (i.elem_l_)
 249       || dynamic_cast<Note_head *> (i.elem_l_)
 250       )
 251     {
 252       if (text_p_)
 253         Side_position_interface (text_p_).add_support (i.elem_l_);
 254
 255       if (to_end_cresc_p_)
 256         Side_position_interface (to_end_cresc_p_).add_support (i.elem_l_);
 257
 258       if (cresc_p_)
 259         Side_position_interface(cresc_p_).add_support (i.elem_l_);
 260     }
 261 }
 262