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--1998 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-sym.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_ =  "dyn" + 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
 106
 107           prop = get_property ("dynamicDir", 0);
 108           if (prop.isnum_b ())
 109             {
 110               staff_side_p_->dir_ = (Direction) (int) prop;
 111             }
 112
 113
 114           announce_element (Score_element_info (text_p_, dreq_l));
 115           announce_element (Score_element_info (staff_side_p_, dreq_l));
 116         }
 117       else if (Span_dynamic_req *span_l = dynamic_cast <Span_dynamic_req *> (dreq_l))
 118         {
 119           if (span_l->spantype_ == STOP)
 120             {
 121               if (!cresc_p_)
 122                 {
 123                   span_l->warning (_ ("can't find (de)crescendo to end"));
 124                 }
 125               else
 126                 {
 127                   assert (!to_end_cresc_p_);
 128                   to_end_cresc_p_ =cresc_p_;
 129                   cresc_p_ = 0;
 130                   Scalar prop = get_property ("dynamicDir", 0);
 131                   if (prop.isnum_b ())
 132                     {
 133                       to_end_cresc_p_->dir_ = (Direction) (int) prop;
 134                     }
 135
 136                 }
 137             }
 138           else if (span_l->spantype_ == START)
 139             {
 140               cresc_req_l_ = span_l;
 141               assert (!new_cresc_p);
 142               new_cresc_p  = new Crescendo;
 143               new_cresc_p->grow_dir_ = span_l->dynamic_dir_;
 144               announce_element (Score_element_info (new_cresc_p, span_l));
 145             }
 146         }
 147     }
 148
 149   if (new_cresc_p)
 150     {
 151       if (cresc_p_)
 152         {
 153           ::warning (_ ("Too many crescendi here"));
 154           typeset_element (cresc_p_);
 155           cresc_p_ = 0;
 156         }
 157
 158       cresc_p_ = new_cresc_p;
 159       cresc_p_->set_bounds(LEFT,get_staff_info().musical_l ());
 160       if (text_p_)
 161         {
 162           cresc_p_->dyn_b_drul_[LEFT] = true;
 163           if (to_end_cresc_p_)
 164             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 165         }
 166     }
 167 }
 168
 169 void
 170 Dynamic_engraver::do_pre_move_processing()
 171 {
 172   Staff_symbol* s_l = get_staff_info().staff_sym_l_;
 173   if (to_end_cresc_p_)
 174     to_end_cresc_p_->add_support (s_l);
 175   if (staff_side_p_)
 176     staff_side_p_->add_support (s_l);
 177
 178
 179   typeset_all ();
 180 }
 181
 182
 183
 184 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 185
 186 void
 187 Dynamic_engraver::do_removal_processing ()
 188 {
 189   if (cresc_p_)
 190     {
 191       typeset_element (cresc_p_ );
 192       cresc_req_l_->warning (_ ("unended crescendo"));
 193       cresc_p_ =0;
 194     }
 195   typeset_all ();
 196 }
 197
 198
 199 void
 200 Dynamic_engraver::typeset_all ()
 201 {
 202   if (to_end_cresc_p_)
 203     {
 204       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_l ());
 205       typeset_element (to_end_cresc_p_);
 206       to_end_cresc_p_ =0;
 207     }
 208   if (text_p_)
 209     {
 210       typeset_element (text_p_);
 211       typeset_element (staff_side_p_);
 212       text_p_ =0;
 213       staff_side_p_ =0;
 214     }
 215 }
 216
 217
 218 void
 219 Dynamic_engraver::acknowledge_element (Score_element_info i)
 220 {
 221   if (dynamic_cast<Stem *> (i.elem_l_)
 222       || dynamic_cast<Note_head *> (i.elem_l_)
 223       )
 224     {
 225       if (staff_side_p_)
 226         staff_side_p_->add_support (i.elem_l_);
 227
 228       if (to_end_cresc_p_)
 229         to_end_cresc_p_->add_support (i.elem_l_);
 230
 231       if (cresc_p_)
 232         cresc_p_->add_support (i.elem_l_);
 233     }
 234 }