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       int i=0;
  86       int j=0;
  87       int tie_count=0;
  88       while  ( i < now_heads_.size () && j < stopped_heads_.size ())
  89         {
  90           int comp
  91             = Musical_pitch::compare (now_heads_[i].req_l_->pitch_ ,
  92                                       stopped_heads_[j].req_l_->pitch_);
  93
  94           if (comp)
  95             {
  96               (comp < 0) ? i ++ : j++;
  97               continue;
  98             }
  99           else
 100             {
 101               tie_count ++;
 102
 103               /* don't go around recreating ties that were already
 104                  made. Not infallible. Due to reordering in sort (),
 105                  we will make the wrong ties when noteheads are
 106                  added.  */
 107               if (tie_count > tie_p_arr_.size ())
 108                 {
 109                   Tie * p = new Tie;
 110                   p->set_head (LEFT, stopped_heads_[j].head_l_);
 111                   p->set_head (RIGHT, now_heads_[i].head_l_);
 112                   tie_p_arr_.push (p);
 113                   announce_element (Score_element_info (p, req_l_));
 114                 }
 115               i++;
 116               j++;
 117
 118             }
 119         }
 120
 121       if (!tie_p_arr_.size ())
 122         {
 123           req_l_->warning (_ ("No ties were created!"));
 124         }
 125
 126     }
 127 }
 128
 129
 130 void
 131 Tie_engraver::do_pre_move_processing ()
 132 {
 133   for (int i=0; i < now_heads_.size (); i++)
 134     {
 135       past_notes_pq_.insert (now_heads_[i]);
 136     }
 137   now_heads_.clear ();
 138
 139   for (int i=0; i<  tie_p_arr_.size (); i++)
 140    {
 141       typeset_element (tie_p_arr_[i]);
 142     }
 143   tie_p_arr_.clear ();
 144 }
 145
 146 void
 147 Tie_engraver::do_post_move_processing ()
 148 {
 149   SCM m = get_property ("automaticMelismata",0);
 150   if (gh_boolean_p (m) && gh_scm2bool (m))
 151     {
 152       set_melisma (false);
 153     }
 154   req_l_ = 0;
 155   Moment now = now_mom ();
 156   while (past_notes_pq_.size () && past_notes_pq_.front ().end_ < now)
 157     past_notes_pq_.delmin ();
 158 }
 159
 160 ADD_THIS_TRANSLATOR(Tie_engraver);
 161
 162
 163 CHead_melodic_tuple::CHead_melodic_tuple ()
 164 {
 165   head_l_ =0;
 166   req_l_ =0;
 167   end_ = 0;
 168 }
 169
 170 CHead_melodic_tuple::CHead_melodic_tuple (Note_head *h, Melodic_req*m, Moment mom)
 171 {
 172   head_l_ = h;
 173   req_l_ = m;
 174   end_ = mom;
 175 }
 176
 177 int
 178 CHead_melodic_tuple::pitch_compare (CHead_melodic_tuple const&h1,
 179                              CHead_melodic_tuple const &h2)
 180 {
 181   return Melodic_req::compare (*h1.req_l_, *h2.req_l_);
 182 }
 183
 184 int
 185 CHead_melodic_tuple::time_compare (CHead_melodic_tuple const&h1,
 186                              CHead_melodic_tuple const &h2)
 187 {
 188   return (h1.end_ - h2.end_ ).sign ();
 189 }