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_dynamic_req * cresc_req_l_;
  34   Array<Dynamic_req*> 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 * r)
  68 {
  69   if(Dynamic_req * d = dynamic_cast <Dynamic_req *> (r))
  70     {
  71       for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  72         if (d->equal_b (dynamic_req_l_arr_[i]))
  73           return true;
  74
  75       dynamic_req_l_arr_.push (d);
  76       return true;
  77     }
  78   return false;
  79 }
  80 void
  81 Dynamic_engraver::do_process_requests()
  82 {
  83   Crescendo*  new_cresc_p=0;
  84   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  85     {
  86       Dynamic_req *dreq_l = dynamic_req_l_arr_[i];
  87       if (Absolute_dynamic_req *absd = dynamic_cast<Absolute_dynamic_req *> (dreq_l))
  88         {
  89           if (text_p_)
  90             {
  91               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused"));
  92               continue;
  93             }
  94
  95           String loud = absd->loudness_str_;
  96
  97           text_p_ = new G_text_item;
  98           text_p_->text_str_ =  loud; // ugh
  99           Scalar prop = get_property ("dynamicStyle", 0);
 100
 101           text_p_->style_str_ = prop.length_i () ? prop :  "dynamic";
 102
 103           staff_side_p_ = new G_staff_side_item;
 104           staff_side_p_->set_victim (text_p_);
 105           staff_side_p_->axis_ = Y_AXIS;
 106
 107
 108           prop = get_property ("dynamicDir", 0);
 109           if (prop.isnum_b ())
 110             {
 111               staff_side_p_->dir_ = (Direction) (int) prop;
 112             }
 113
 114
 115           announce_element (Score_element_info (text_p_, dreq_l));
 116           announce_element (Score_element_info (staff_side_p_, dreq_l));
 117         }
 118       else if (Span_dynamic_req *span_l
 119                = dynamic_cast <Span_dynamic_req *> (dreq_l))
 120         {
 121           if (span_l->spantype_ == STOP)
 122             {
 123               if (!cresc_p_)
 124                 {
 125                   span_l->warning (_ ("can't find (de)crescendo to end"));
 126                 }
 127               else
 128                 {
 129                   assert (!to_end_cresc_p_);
 130                   to_end_cresc_p_ =cresc_p_;
 131                   cresc_p_ = 0;
 132                   Scalar prop = get_property ("dynamicDir", 0);
 133                   if (prop.isnum_b ())
 134                     {
 135                       to_end_cresc_p_->dir_ = (Direction) (int) prop;
 136                     }
 137
 138                 }
 139             }
 140           else if (span_l->spantype_ == START)
 141             {
 142               cresc_req_l_ = span_l;
 143               assert (!new_cresc_p);
 144               new_cresc_p  = new Crescendo;
 145               new_cresc_p->grow_dir_ = span_l->dynamic_dir_;
 146               announce_element (Score_element_info (new_cresc_p, span_l));
 147             }
 148         }
 149     }
 150
 151   if (new_cresc_p)
 152     {
 153       if (cresc_p_)
 154         {
 155           ::warning (_ ("Too many crescendi here"));
 156           typeset_element (cresc_p_);
 157           cresc_p_ = 0;
 158         }
 159
 160       cresc_p_ = new_cresc_p;
 161       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 162       if (text_p_)
 163         {
 164           cresc_p_->dyn_b_drul_[LEFT] = true;
 165           if (to_end_cresc_p_)
 166             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 167         }
 168     }
 169 }
 170
 171 void
 172 Dynamic_engraver::do_pre_move_processing()
 173 {
 174   typeset_all ();
 175 }
 176
 177
 178
 179 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 180
 181 void
 182 Dynamic_engraver::do_removal_processing ()
 183 {
 184   if (cresc_p_)
 185     {
 186       typeset_element (cresc_p_ );
 187       cresc_req_l_->warning (_ ("unended crescendo"));
 188       cresc_p_ =0;
 189     }
 190   typeset_all ();
 191 }
 192
 193
 194 void
 195 Dynamic_engraver::typeset_all ()
 196 {
 197   if (to_end_cresc_p_)
 198     {
 199       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 200       typeset_element (to_end_cresc_p_);
 201       to_end_cresc_p_ =0;
 202     }
 203   if (text_p_)
 204     {
 205       typeset_element (text_p_);
 206       typeset_element (staff_side_p_);
 207       text_p_ =0;
 208       staff_side_p_ =0;
 209     }
 210 }
 211
 212
 213 void
 214 Dynamic_engraver::acknowledge_element (Score_element_info i)
 215 {
 216   if (dynamic_cast<Stem *> (i.elem_l_)
 217       || dynamic_cast<Note_head *> (i.elem_l_)
 218       )
 219     {
 220       if (staff_side_p_)
 221         staff_side_p_->add_support (i.elem_l_);
 222
 223       if (to_end_cresc_p_)
 224         to_end_cresc_p_->add_support (i.elem_l_);
 225
 226       if (cresc_p_)
 227         cresc_p_->add_support (i.elem_l_);
 228     }
 229 }