lily/tie-engraver.cc

   1 /*
   2   ctie-engraver.cc --  implement Tie_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "tie-engraver.hh"
  11 #include "command-request.hh"
  12 #include "note-head.hh"
  13 #include "musical-request.hh"
  14 #include "tie.hh"
  15 #include "translator-group.hh"
  16
  17 Tie_engraver::Tie_engraver()
  18 {
  19   req_l_ = 0;
  20 }
  21
  22
  23 bool
  24 Tie_engraver::do_try_music (Music *m)
  25 {
  26   if (Tie_req * c = dynamic_cast<Tie_req*> (m))
  27     {
  28       req_l_ = c;
  29       SCM m = get_property ("automaticMelismata",0);
  30       bool am = gh_boolean_p (m) &&gh_scm2bool (m);
  31       if (am)
  32         {
  33           set_melisma (true);
  34         }
  35       return true;
  36     }
  37   return false;
  38 }
  39
  40 void
  41 Tie_engraver::set_melisma (bool m)
  42 {
  43   Translator_group *where = daddy_trans_l_;
  44   get_property ("tieMelismaBusy", &where);
  45   if (!where)
  46     where = daddy_trans_l_;
  47
  48   daddy_trans_l_->set_property ("tieMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
  49 }
  50
  51 void
  52 Tie_engraver::acknowledge_element (Score_element_info i)
  53 {
  54   if (Note_head *nh = dynamic_cast<Note_head *> (i.elem_l_))
  55     {
  56       Note_req * m = dynamic_cast<Note_req* > (i.req_l_);
  57       if (!m)
  58         return;
  59       now_heads_.push (CHead_melodic_tuple (nh, m, now_mom()+ m->length_mom ()));
  60     }
  61 }
  62
  63 void
  64 Tie_engraver::do_process_requests ()
  65 {
  66   if (req_l_)
  67     {
  68       Moment now = now_mom ();
  69       Link_array<Note_head> nharr;
  70
  71       stopped_heads_.clear ();
  72       while (past_notes_pq_.size ()
  73              && past_notes_pq_.front ().end_ == now)
  74         stopped_heads_.push (past_notes_pq_.get ());
  75     }
  76 }
  77
  78 void
  79 Tie_engraver::process_acknowledged ()
  80 {
  81   if (req_l_)
  82     {
  83       now_heads_.sort (CHead_melodic_tuple::pitch_compare);
  84       stopped_heads_.sort(CHead_melodic_tuple::pitch_compare);
  85
  86       SCM head_list = SCM_EOL;
  87
  88       int j = stopped_heads_.size ()-1;
  89       int i = now_heads_.size ()-1;
  90
  91       while  (i >= 0 && j >=0)
  92         {
  93           int comp
  94             = Musical_pitch::compare (now_heads_[i].req_l_->pitch_ ,
  95                                       stopped_heads_[j].req_l_->pitch_);
  96
  97           if (comp)
  98             {
  99               (comp < 0) ? j -- : i--;
 100               continue;
 101             }
 102           else
 103             {
 104               head_list  = gh_cons (gh_cons (stopped_heads_[j].head_l_->self_scm_,
 105                                              now_heads_[i].head_l_->self_scm_),
 106                                     head_list);
 107
 108               past_notes_pq_. insert (now_heads_[i]);
 109               now_heads_.del (i);
 110               stopped_heads_.del (j);
 111               i--;
 112               j--;
 113             }
 114         }
 115
 116
 117       SCM sparse = get_property ("sparseTies", 0);
 118       if (to_boolean (sparse))
 119         {
 120           int i = scm_ilength (head_list);
 121
 122           if (!i)
 123             return;
 124
 125           SCM pair = gh_list_ref (head_list, gh_int2scm (i/2));
 126
 127           Tie * p = new Tie;
 128           p->set_head (LEFT, dynamic_cast<Item*> (unsmob_element (gh_car (pair))));
 129           p->set_head (RIGHT, dynamic_cast<Item*> (unsmob_element (gh_cdr (pair))));
 130
 131           tie_p_arr_.push (p);
 132           announce_element (Score_element_info (p, req_l_));
 133         }
 134       else for (SCM s = head_list; gh_pair_p (s); s = gh_cdr (s))
 135         {
 136           Tie * p = new Tie;
 137           p->set_head (LEFT, dynamic_cast<Item*> (unsmob_element (gh_caar (s))));
 138           p->set_head (RIGHT, dynamic_cast<Item*> (unsmob_element (gh_cdar (s))));
 139
 140           tie_p_arr_.push (p);
 141           announce_element (Score_element_info (p, req_l_));
 142         }
 143
 144       if (!tie_p_arr_.size ())
 145         {
 146           req_l_->warning (_ ("No ties were created!"));
 147         }
 148
 149     }
 150 }
 151
 152
 153 void
 154 Tie_engraver::do_pre_move_processing ()
 155 {
 156   for (int i=0; i < now_heads_.size (); i++)
 157     {
 158       past_notes_pq_.insert (now_heads_[i]);
 159     }
 160   now_heads_.clear ();
 161
 162   for (int i=0; i<  tie_p_arr_.size (); i++)
 163    {
 164       typeset_element (tie_p_arr_[i]);
 165     }
 166   tie_p_arr_.clear ();
 167 }
 168
 169 void
 170 Tie_engraver::do_post_move_processing ()
 171 {
 172   SCM m = get_property ("automaticMelismata",0);
 173   if (to_boolean (m))
 174     {
 175       set_melisma (false);
 176     }
 177   req_l_ = 0;
 178   Moment now = now_mom ();
 179   while (past_notes_pq_.size () && past_notes_pq_.front ().end_ < now)
 180     past_notes_pq_.delmin ();
 181 }
 182
 183 ADD_THIS_TRANSLATOR(Tie_engraver);
 184
 185
 186 CHead_melodic_tuple::CHead_melodic_tuple ()
 187 {
 188   head_l_ =0;
 189   req_l_ =0;
 190   end_ = 0;
 191 }
 192
 193 CHead_melodic_tuple::CHead_melodic_tuple (Note_head *h, Melodic_req*m, Moment mom)
 194 {
 195   head_l_ = h;
 196   req_l_ = m;
 197   end_ = mom;
 198 }
 199
 200 int
 201 CHead_melodic_tuple::pitch_compare (CHead_melodic_tuple const&h1,
 202                              CHead_melodic_tuple const &h2)
 203 {
 204   return Melodic_req::compare (*h1.req_l_, *h2.req_l_);
 205 }
 206
 207 int
 208 CHead_melodic_tuple::time_compare (CHead_melodic_tuple const&h1,
 209                              CHead_melodic_tuple const &h2)
 210 {
 211   return (h1.end_ - h2.end_ ).sign ();
 212 }