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 "paper-def.hh"
  10 #include "dimen.hh"
  11 #include "staff-side.hh"
  12 #include "staff-sym.hh"
  13 #include "debug.hh"
  14
  15 void
  16 Staff_side::set_staffsym(Staff_symbol* s_l)
  17 {
  18     staff_sym_l_ = s_l;
  19 }
  20
  21 Staff_side::Staff_side()
  22 {
  23     staff_size_i_ = 0;
  24     staff_sym_l_=0;
  25     dir_i_ =0;
  26     inside_staff_b_ =false;
  27 }
  28
  29 void
  30 Staff_side::read_staff_sym()
  31 {
  32     if (! staff_sym_l_)
  33         return ;
  34     staff_size_i_ = staff_sym_l_->steps_i();
  35 }
  36
  37
  38 Interval
  39 Staff_side::support_height() const
  40 {
  41     Interval r;
  42
  43     for (int i=0; i < support_l_arr_.size(); i++)
  44         r.unite(support_l_arr_[i]->height());
  45     if (r.empty_b()) {
  46         r = Interval(0,0);
  47     }
  48     return r;
  49 }
  50
  51 void
  52 Staff_side::add_support(Score_elem*i)
  53 {
  54     support_l_arr_.push(i);
  55     add_dependency(i);
  56 }
  57
  58 int
  59 Staff_side::get_position_i()const
  60 {
  61     if (!dir_i_) {
  62         warning("Staff_side::get_position_i(): "
  63                 "somebody forgot to set my vertical direction, returning -20");
  64         return -20;
  65     }
  66
  67
  68     Real y=0;
  69     Real inter_f = paper()-> internote_f();
  70     if (!inside_staff_b_) {
  71         y  = (dir_i_ > 0 && staff_sym_l_) ? staff_sym_l_->steps_i() + 2: -2;
  72         y *=inter_f;
  73         Interval v= support_height();
  74
  75         if (dir_i_ > 0) {
  76             y = y >? (v.max() + 2*inter_f);
  77         } else if (dir_i_ < 0) {
  78             y = y <? (v.min() - 2*inter_f);
  79         }
  80     } else {
  81         Interval v= support_height();
  82         y = v[dir_i_]  + 2*dir_i_*inter_f;      // ugh
  83     }
  84     return int(rint(Real(y)/inter_f)); // should ret a float?
  85 }
  86
  87 int
  88 Staff_side::get_position_i(Interval sym_dim) const
  89 {
  90     int i= get_position_i();
  91     return i+ int(rint(- sym_dim[-dir_i_] / paper()->internote_f()));
  92 }
  93
  94
  95 void
  96 Staff_side::do_substitute_dependency(Score_elem*o, Score_elem*n )
  97 {
  98     int i;
  99     while ((i=support_l_arr_.find_i(o) ) >=0)
 100         if (n)
 101             support_l_arr_[i] = n;
 102         else
 103             support_l_arr_.del(i);
 104
 105     if (staff_sym_l_ == o)
 106         staff_sym_l_ = n ? (Staff_symbol*) n->spanner():0;
 107 }