lily/tie-grav.cc

   1 /*
   2   tie-reg.cc -- implement Tie_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "tie-grav.hh"
  10 #include "tie.hh"
  11 #include "note-head.hh"
  12 #include "musical-request.hh"
  13 #include "music-list.hh"
  14
  15 Tie_engraver::Tie_engraver()
  16 {
  17   end_tie_p_ = 0;
  18   tie_p_ = 0;
  19   req_l_ =0;
  20   end_req_l_ =0;
  21   end_mom_ = -1;
  22   melodic_req_l_ = 0;
  23   end_melodic_req_l_ =0;
  24   dir_i_ = 0;
  25 }
  26
  27 void
  28 Tie_engraver::sync_features()
  29 {
  30   dir_i_ = get_feature ("vdir");
  31 }
  32
  33
  34 void
  35 Tie_engraver::do_post_move_processing()
  36 {
  37   if (tie_p_ && get_staff_info().when () == end_mom_)
  38     {
  39         end_tie_p_ = tie_p_;
  40         end_req_l_ = req_l_;
  41         end_melodic_req_l_ = melodic_req_l_;
  42         tie_p_ =0;
  43         req_l_ =0;
  44         end_mom_ = -1;
  45     }
  46 }
  47
  48 bool
  49 Tie_engraver::acceptable_request_b (Request*r)
  50 {
  51   return r->musical() && r->musical ()->tie ();
  52 }
  53
  54 bool
  55 Tie_engraver::do_try_request (Request*r)
  56 {
  57   if (!acceptable_request_b (r))
  58         return false;
  59   if (req_l_)
  60     {
  61         return false;
  62     }
  63   req_l_ = r->musical()->tie ();
  64   end_mom_ = r->parent_music_l_->time_int().length ()
  65         + get_staff_info().when ();
  66   return true;
  67 }
  68
  69 void
  70 Tie_engraver::do_process_requests()
  71 {
  72   if (req_l_ && ! tie_p_)
  73     {
  74         tie_p_ = new Tie;
  75     }
  76 }
  77
  78 void
  79 Tie_engraver::acknowledge_element (Score_elem_info i)
  80 {
  81   if (i.elem_l_->name() == Note_head::static_name ())
  82     {
  83         if (tie_p_)
  84           {
  85             tie_p_->set_head (-1, (Note_head*)i.elem_l_->item());
  86             melodic_req_l_ = i.req_l_->musical()->melodic ();
  87           }
  88
  89         if (end_tie_p_)
  90           {
  91             end_tie_p_->set_head (1, (Note_head*)i.elem_l_->item());
  92             if (!Melodic_req::compare ( *end_melodic_req_l_, *melodic_req_l_))
  93                 end_tie_p_->same_pitch_b_ = true;
  94             announce_element (Score_elem_info (end_tie_p_,end_req_l_));
  95           }
  96     }
  97 }
  98
  99 void
 100 Tie_engraver::do_pre_move_processing()
 101 {
 102   if (end_tie_p_)
 103     {
 104         if (dir_i_)
 105             end_tie_p_->dir_i_ =  dir_i_;
 106
 107         typeset_element (end_tie_p_);
 108         end_tie_p_ =0;
 109         end_req_l_ =0;
 110     }
 111
 112 }
 113
 114 Tie_engraver::~Tie_engraver()
 115 {
 116   if (tie_p_)
 117     {
 118         req_l_->warning ("unended Tie");
 119         delete tie_p_;
 120     }
 121 }
 122
 123 void
 124 Tie_engraver::set_feature (Feature f)
 125 {
 126   if (f.type_ == "vdir")
 127         dir_i_ = f.value_;
 128 }
 129
 130
 131 IMPLEMENT_IS_TYPE_B1(Tie_engraver,Engraver);
 132 ADD_THIS_ENGRAVER(Tie_engraver);