lily/staff-side.cc

   1 /*
   2   staff-side.cc -- implement Staff_side
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "interval.hh"
  10 #include "paper-def.hh"
  11 #include "dimen.hh"
  12 #include "staff-side.hh"
  13 #include "staff-sym.hh"
  14 #include "debug.hh"
  15
  16 void
  17 Staff_side::set_staffsym(Staff_symbol* s_l)
  18 {
  19     staff_sym_l_ = s_l;
  20     add_dependency( s_l );
  21 }
  22
  23 Staff_side::Staff_side()
  24 {
  25     staff_size_i_ = 0;
  26     staff_sym_l_=0;
  27     dir_i_ =0;
  28     inside_staff_b_ =false;
  29 }
  30
  31 void
  32 Staff_side::read_staff_sym()
  33 {
  34     if (! staff_sym_l_)
  35         return ;
  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(Score_elem*i)
  55 {
  56     support_l_arr_.push(i);
  57     add_dependency(i);
  58 }
  59
  60 int
  61 Staff_side::get_position_i()const
  62 {
  63     if (!dir_i_) {
  64         warning("Staff_side::get_position_i(): "
  65                 "somebody forgot to set my vertical direction, returning -20");
  66         return -20;
  67     }
  68
  69
  70     Real y=0;
  71     Real inter_f = paper()-> internote_f();
  72     if (!inside_staff_b_) {
  73         y  = (dir_i_ > 0 && staff_sym_l_) ? staff_sym_l_->steps_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     if (dir_i_)
  94         return i+ int(rint(- sym_dim[-dir_i_] / paper()->internote_f()));
  95     else
  96         return i;
  97 }
  98
  99
 100 void
 101 Staff_side::do_substitute_dependency(Score_elem*o, Score_elem*n)
 102 {
 103     int i;
 104     while ((i=support_l_arr_.find_i(o) ) >=0)
 105         if (n)
 106             support_l_arr_[i] = n;
 107         else
 108             support_l_arr_.del(i);
 109
 110     if (staff_sym_l_ == o)
 111         staff_sym_l_ = n ? (Staff_symbol*) n->spanner():0;
 112 }
 113
 114 IMPLEMENT_STATIC_NAME(Staff_side);
 115 IMPLEMENT_IS_TYPE_B1(Staff_side, Score_elem);