lily/tie.cc

   1 /*
   2   tie.cc -- implement Tie
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "paper-def.hh"
  10 #include "tie.hh"
  11 #include "notehead.hh"
  12 #include "p-col.hh"
  13
  14 Spanner*
  15 Tie::do_break_at(PCol*l, PCol*r) const
  16 {
  17     Tie * tie_p = new Tie(*this);
  18     Line_of_score const  *line_C=l->line_l_;
  19     tie_p->left_head_l_ = (left_head_l_->line_l()== line_C) ?
  20         left_head_l_ : 0;
  21     tie_p->right_head_l_  = (right_head_l_->line_l() == line_C)?
  22         right_head_l_ : 0;
  23
  24     return tie_p;
  25 }
  26
  27 void
  28 Tie::set_head(int x_pos, Notehead * head_l)
  29 {
  30     if (x_pos >0) {
  31         assert(!right_head_l_);
  32         right_head_l_ = head_l;
  33     } else {
  34         assert(!left_head_l_);
  35         left_head_l_ = head_l;
  36     }
  37     add_dependency(head_l);
  38 }
  39
  40 Tie::Tie()
  41 {
  42     right_head_l_ =0;
  43     left_head_l_ =0;
  44     same_pitch_b_ =false;
  45 }
  46
  47 void
  48 Tie::set_default_dir()
  49 {
  50     int m= (left_head_l_->position_i_ + right_head_l_->position_i_) /2 ;
  51     dir_i_ =  (m < 5)? -1:1;                    // ugh
  52 }
  53
  54
  55 void
  56 Tie::do_add_processing()
  57 {
  58     assert(left_head_l_ && right_head_l_);
  59     left_col_l_ = left_head_l_ -> pcol_l_;
  60     right_col_l_ = right_head_l_ -> pcol_l_;
  61 }
  62
  63 void
  64 Tie::do_post_processing()
  65 {
  66     assert(left_head_l_ || right_head_l_);
  67     left_pos_i_ =  (left_head_l_)?
  68         left_head_l_->position_i_ : right_head_l_->position_i_;
  69     right_pos_i_ = (right_head_l_) ?
  70         right_head_l_->position_i_ : left_head_l_->position_i_;
  71
  72     if ( right_head_l_ && right_head_l_->extremal_i_) {
  73         right_pos_i_ += 2*dir_i_;
  74         right_dx_f_ -= 0.25;
  75     } else
  76         right_dx_f_ -= 0.5;
  77
  78     if (left_head_l_ && left_head_l_->extremal_i_) {
  79         left_pos_i_ += 2*dir_i_;
  80         left_dx_f_ += 0.25;
  81     } else
  82         left_dx_f_ += 0.5;
  83 }
  84
  85