lily/ctie-engraver.cc

   1 /*
   2   ctie-engraver.cc --  implement Command_tie_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "ctie-engraver.hh"
  11 #include "command-request.hh"
  12 #include "note-head.hh"
  13 #include "musical-request.hh"
  14 #include "tie.hh"
  15
  16 Command_tie_engraver::Command_tie_engraver()
  17 {
  18   req_l_ = 0;
  19 }
  20
  21
  22 bool
  23 Command_tie_engraver::do_try_music (Music *m)
  24 {
  25   if (Command_tie_req * c = dynamic_cast<Command_tie_req*> (m))
  26     {
  27       req_l_ = c;
  28       return true;
  29     }
  30   return false;
  31 }
  32
  33 void
  34 Command_tie_engraver::acknowledge_element (Score_element_info i)
  35 {
  36   if (Note_head *nh = dynamic_cast<Note_head *> (i.elem_l_))
  37     {
  38       Note_req * m = dynamic_cast<Note_req* > (i.req_l_);
  39       now_heads_.push (CHead_melodic_tuple (nh, m, now_moment()+ m->duration ()));
  40     }
  41 }
  42
  43 void
  44 Command_tie_engraver::do_process_requests ()
  45 {
  46   if (req_l_)
  47     {
  48       Moment now = now_moment ();
  49       Link_array<Note_head> nharr;
  50
  51       stopped_heads_.clear ();
  52       while (past_notes_pq_.size ()
  53              && past_notes_pq_.front ().end_ == now)
  54         stopped_heads_.push (past_notes_pq_.get ());
  55
  56     }
  57 }
  58
  59 void
  60 Command_tie_engraver::process_acknowledged ()
  61 {
  62   if (req_l_)
  63     {
  64       if (now_heads_.size () != stopped_heads_.size ())
  65         {
  66           req_l_->warning ("Unequal number of note heads for tie");
  67         }
  68       int sz = now_heads_.size () <? stopped_heads_.size ();
  69
  70       // hmm. Should do something more sensible.
  71       // because, we assume no more noteheads come along after the 1st pass.
  72       if (sz > tie_p_arr_.size ())
  73         {
  74           now_heads_.sort (CHead_melodic_tuple::pitch_compare);
  75           stopped_heads_.sort(CHead_melodic_tuple::pitch_compare);
  76
  77           for (int i=0; i < sz; i++)
  78             {
  79               Tie * p = new Tie;
  80               p->set_head (LEFT, stopped_heads_[i].head_l_);
  81               p->set_head (RIGHT, now_heads_[i].head_l_);
  82               tie_p_arr_.push (p);
  83               announce_element (Score_element_info (p, req_l_));
  84             }
  85         }
  86     }
  87 }
  88
  89 void
  90 Command_tie_engraver::do_pre_move_processing ()
  91 {
  92   for (int i=0; i < now_heads_.size (); i++)
  93     {
  94       past_notes_pq_.insert (now_heads_[i]);
  95     }
  96   now_heads_.clear( );
  97
  98   for (int i=0; i<  tie_p_arr_.size (); i++)
  99     {
 100       typeset_element (tie_p_arr_[i]);
 101     }
 102   tie_p_arr_.clear ();
 103 }
 104
 105 void
 106 Command_tie_engraver::do_post_move_processing ()
 107 {
 108   req_l_ =0;
 109   Moment now = now_moment ();
 110   while (past_notes_pq_.size () && past_notes_pq_.front ().end_ < now)
 111     past_notes_pq_.delmin ();
 112 }
 113
 114
 115
 116 ADD_THIS_TRANSLATOR(Command_tie_engraver);
 117
 118
 119 CHead_melodic_tuple::CHead_melodic_tuple ()
 120 {
 121   head_l_ =0;
 122   mel_l_ =0;
 123   end_ = 0;
 124 }
 125
 126 CHead_melodic_tuple::CHead_melodic_tuple (Note_head *h, Melodic_req*m, Moment mom)
 127 {
 128   head_l_ = h;
 129   mel_l_ = m;
 130   end_ = mom;
 131 }
 132
 133 int
 134 CHead_melodic_tuple::pitch_compare (CHead_melodic_tuple const&h1,
 135                              CHead_melodic_tuple const &h2)
 136 {
 137   return Melodic_req::compare (*h1.mel_l_, *h2.mel_l_);
 138 }
 139
 140 int
 141 CHead_melodic_tuple::time_compare (CHead_melodic_tuple const&h1,
 142                              CHead_melodic_tuple const &h2)
 143 {
 144   return (h1.end_ - h2.end_ ).sign ();
 145 }