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
  31   Crescendo * to_end_cresc_p_;
  32   Crescendo * cresc_p_;
  33   Span_req * cresc_req_l_;
  34   Array<Request*> dynamic_req_l_arr_;
  35   void  typeset_all ();
  36 public:
  37   VIRTUAL_COPY_CONS(Translator);
  38   Dynamic_engraver();
  39
  40 protected:
  41   virtual void do_removal_processing ();
  42   virtual void acknowledge_element (Score_element_info);
  43   virtual bool do_try_music (Music *req_l);
  44   virtual void do_process_requests();
  45   virtual void do_pre_move_processing();
  46   virtual void do_post_move_processing();
  47 };
  48
  49
  50
  51 Dynamic_engraver::Dynamic_engraver()
  52 {
  53   do_post_move_processing();
  54   text_p_ =0;
  55   staff_side_p_ =0;
  56   to_end_cresc_p_ = cresc_p_ = 0;
  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   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 G_text_item;
 112           text_p_->text_str_ =  loud; // ugh
 113           Scalar prop = get_property ("dynamicStyle", 0);
 114
 115           text_p_->style_str_ = prop.length_i () ? prop :  "dynamic";
 116
 117           staff_side_p_ = new G_staff_side_item;
 118           staff_side_p_->set_elt_property (script_priority_scm_sym,
 119                                            gh_int2scm (100));
 120
 121           staff_side_p_->set_victim (text_p_);
 122           staff_side_p_->axis_ = Y_AXIS;
 123
 124
 125           prop = get_property ("dynamicDir", 0);
 126           if (prop.isnum_b ())
 127             {
 128               staff_side_p_->dir_ = (Direction) (int) prop;
 129             }
 130
 131
 132           announce_element (Score_element_info (text_p_, absd));
 133           announce_element (Score_element_info (staff_side_p_, absd));
 134         }
 135       else if (Span_req *span_l
 136                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 137         {
 138           if (span_l->span_dir_ == STOP)
 139             {
 140               if (!cresc_p_)
 141                 {
 142                   span_l->warning (_ ("can't find (de)crescendo to end"));
 143                 }
 144               else
 145                 {
 146                   assert (!to_end_cresc_p_);
 147                   to_end_cresc_p_ =cresc_p_;
 148                   cresc_p_ = 0;
 149                   Scalar prop = get_property ("dynamicDir", 0);
 150                   if (prop.isnum_b ())
 151                     {
 152                       to_end_cresc_p_->dir_ = (Direction) (int) prop;
 153                     }
 154
 155                 }
 156             }
 157           else if (span_l->span_dir_ == START)
 158             {
 159               cresc_req_l_ = span_l;
 160               assert (!new_cresc_p);
 161               new_cresc_p  = new Crescendo;
 162               new_cresc_p->grow_dir_ = (span_l->span_type_str_ == "crescendo")  ? BIGGER : SMALLER;
 163               announce_element (Score_element_info (new_cresc_p, span_l));
 164             }
 165         }
 166     }
 167
 168   if (new_cresc_p)
 169     {
 170       if (cresc_p_)
 171         {
 172           ::warning (_ ("Too many crescendi here"));
 173           typeset_element (cresc_p_);
 174           cresc_p_ = 0;
 175         }
 176
 177       cresc_p_ = new_cresc_p;
 178       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 179       if (text_p_)
 180         {
 181           cresc_p_->dyn_b_drul_[LEFT] = true;
 182           if (to_end_cresc_p_)
 183             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 184         }
 185     }
 186 }
 187
 188 void
 189 Dynamic_engraver::do_pre_move_processing()
 190 {
 191   typeset_all ();
 192 }
 193
 194
 195
 196 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 197
 198 void
 199 Dynamic_engraver::do_removal_processing ()
 200 {
 201   if (cresc_p_)
 202     {
 203       typeset_element (cresc_p_ );
 204       cresc_req_l_->warning (_ ("unended crescendo"));
 205       cresc_p_ =0;
 206     }
 207   typeset_all ();
 208 }
 209
 210
 211 void
 212 Dynamic_engraver::typeset_all ()
 213 {
 214   if (to_end_cresc_p_)
 215     {
 216       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 217       typeset_element (to_end_cresc_p_);
 218       to_end_cresc_p_ =0;
 219     }
 220   if (text_p_)
 221     {
 222       typeset_element (text_p_);
 223       typeset_element (staff_side_p_);
 224       text_p_ =0;
 225       staff_side_p_ =0;
 226     }
 227 }
 228
 229
 230 void
 231 Dynamic_engraver::acknowledge_element (Score_element_info i)
 232 {
 233   if (dynamic_cast<Stem *> (i.elem_l_)
 234       || dynamic_cast<Note_head *> (i.elem_l_)
 235       )
 236     {
 237       if (staff_side_p_)
 238         staff_side_p_->add_support (i.elem_l_);
 239
 240       if (to_end_cresc_p_)
 241         to_end_cresc_p_->add_support (i.elem_l_);
 242
 243       if (cresc_p_)
 244         cresc_p_->add_support (i.elem_l_);
 245     }
 246 }