lily/slur.cc

   1 /*
   2   slur.cc -- implement  Slur
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996, 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 /*
  10
  11   TODO:
  12
  13   think about crossing stems.
  14   Begin and end should be treated as a Script.
  15
  16  */
  17 #include "slur.hh"
  18 #include "scalar.hh"
  19 #include "lookup.hh"
  20 #include "paper-def.hh"
  21 #include "note-column.hh"
  22 #include "stem.hh"
  23 #include "p-col.hh"
  24 #include "molecule.hh"
  25 #include "debug.hh"
  26 #include "boxes.hh"
  27
  28
  29
  30 void
  31 Slur::add(Note_column*n)
  32 {
  33     encompass_arr_.push(n);
  34     add_dependency(n);
  35 }
  36
  37 void
  38 Slur::set_default_dir()
  39 {
  40     dir_i_ = -1;
  41     for (int i=0; i < encompass_arr_.size(); i ++) {
  42         if (encompass_arr_[i]->dir_i_ < 0) {
  43             dir_i_ =1;
  44             break;
  45         }
  46     }
  47 }
  48
  49 void
  50 Slur::do_pre_processing()
  51 {
  52     right_col_l_  = encompass_arr_.top()->pcol_l_;
  53     left_col_l_ = encompass_arr_[0]->pcol_l_;
  54 }
  55
  56 void
  57 Slur::do_break_at(PCol*l, PCol*r)
  58 {
  59     assert(l->line_l_ == r->line_l_);
  60
  61     Array<Note_column*> old_encompass_arr = encompass_arr_;
  62     encompass_arr_.set_size(0);
  63     for (int i =0; i < old_encompass_arr.size(); i++) {
  64         if (old_encompass_arr[i]->pcol_l_->line_l_==l->line_l_)
  65             encompass_arr_.push(old_encompass_arr[i]);
  66     }
  67 }
  68
  69 void
  70 Slur::do_substitute_dependency(Score_elem*o, Score_elem*n)
  71 {
  72     int i;
  73     while((i = encompass_arr_.find_i((Note_column*)o->item())) >=0) {
  74         if (n)
  75             encompass_arr_[i] = (Note_column*)n->item();
  76         else
  77             encompass_arr_.del(i);
  78     }
  79 }
  80
  81
  82 void
  83 Slur::do_post_processing()
  84 {
  85     if (!dir_i_)
  86         set_default_dir();
  87     Real inter_f = paper()->internote_f();
  88     if (encompass_arr_[0]->stem_l_)
  89         left_pos_i_ = rint(encompass_arr_[0]->stem_l_->height()[dir_i_]/inter_f);
  90     else
  91         left_pos_i_ = 0;
  92     if (encompass_arr_.top()->stem_l_)
  93         right_pos_i_ = rint(encompass_arr_.top()->stem_l_->height()[dir_i_]/inter_f);
  94     else
  95         right_pos_i_ = 0;
  96
  97     left_pos_i_ += dir_i_;
  98     right_pos_i_ += dir_i_;
  99 }
 100 IMPLEMENT_STATIC_NAME(Slur);