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