lily/staff-side.cc

   1 /*
   2   staff-side.cc -- implement Staff_side
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "dimen.hh"
  10 #include "staff-side.hh"
  11 #include "staff-sym.hh"
  12 #include "debug.hh"
  13
  14 void
  15 Staff_side::set_staffsym(Staff_symbol* s_l)
  16 {
  17     staff_sym_l_ = s_l;
  18 }
  19
  20 Staff_side::Staff_side(Staff_elem * elem_l)
  21 {
  22     inter_f_ = 2 PT;
  23     staff_size_i_ = 0;
  24     staff_sym_l_=0;
  25     elem_l_ = elem_l;
  26     dir_i_ =0;
  27     inside_staff_b_ =false;
  28 }
  29
  30 void
  31 Staff_side::read_staff_sym()
  32 {
  33     if (! staff_sym_l_)
  34         return ;
  35     inter_f_ = staff_sym_l_->inter_note_f();
  36     staff_size_i_ = staff_sym_l_->steps_i();
  37 }
  38
  39
  40 Interval
  41 Staff_side::support_height() const
  42 {
  43     Interval r;
  44
  45     for (int i=0; i < support_l_arr_.size(); i++)
  46         r.unite(support_l_arr_[i]->height());
  47     if (r.empty_b()) {
  48         r = Interval(0,0);
  49     }
  50     return r;
  51 }
  52
  53 void
  54 Staff_side::add_support(Staff_elem*i)
  55 {
  56     support_l_arr_.push(i);
  57     elem_l_->add_dependency(i);
  58 }
  59
  60 int
  61 Staff_side::get_position_i()const
  62 {
  63     ((Staff_side*)this)->read_staff_sym();
  64     if (!dir_i_) {
  65         warning("Staff_side::get_position_i(): "
  66                 "somebody forgot to set my vertical direction, returning -20");
  67         return -20;
  68     }
  69
  70
  71     Real y=0;
  72     if (!inside_staff_b_) {
  73         y  = (dir_i_ > 0) ? staff_size_i_ + 2: -2;
  74         y *=inter_f_;
  75         Interval v= support_height();
  76
  77         if (dir_i_ > 0) {
  78             y = y >? (v.max() + 2*inter_f_);
  79         } else if (dir_i_ < 0) {
  80             y = y <? (v.min() - 2*inter_f_);
  81         }
  82     } else {
  83         Interval v= support_height();
  84         y = v[dir_i_]  + 2*dir_i_*inter_f_;     // ugh
  85     }
  86     return int(rint(Real(y)/inter_f_)); // should ret a float?
  87 }
  88
  89 int
  90 Staff_side::get_position_i(Interval sym_dim) const
  91 {
  92     int i= get_position_i();
  93     return i+ int(rint(- sym_dim[-dir_i_] / inter_f_));
  94 }