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 }
  45
  46 void
  47 Tie::set_default_dir()
  48 {
  49     int m= (left_head_l_->position_i_ + right_head_l_->position_i_) /2 ;
  50     dir_i_ =  (m < 5)? -1:1;                    // ugh
  51 }
  52
  53
  54 void
  55 Tie::do_add_processing()
  56 {
  57     assert(left_head_l_ && right_head_l_);
  58     left_col_l_ = left_head_l_ -> pcol_l_;
  59     right_col_l_ = right_head_l_ -> pcol_l_;
  60 }
  61
  62 void
  63 Tie::do_post_processing()
  64 {
  65     assert(left_head_l_ || right_head_l_);
  66     left_pos_i_ =  (left_head_l_)?
  67         left_head_l_->position_i_ : right_head_l_->position_i_;
  68     right_pos_i_ = (right_head_l_) ?
  69         right_head_l_->position_i_ : left_head_l_->position_i_;
  70
  71     if ( right_head_l_ && right_head_l_->extremal_i_) {
  72         right_pos_i_ += 2*dir_i_;
  73         right_dx_f_ -= 0.25;
  74     } else
  75         right_dx_f_ -= 0.5;
  76
  77     if (left_head_l_ && left_head_l_->extremal_i_) {
  78         left_pos_i_ += 2*dir_i_;
  79         left_dx_f_ += 0.25;
  80     } else
  81         left_dx_f_ += 0.5;
  82 }
  83
  84