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 }
  21
  22 Staff_side::Staff_side()
  23 {
  24     staff_size_i_ = 0;
  25     staff_sym_l_=0;
  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     staff_size_i_ = staff_sym_l_->steps_i();
  36 }
  37
  38
  39 Interval
  40 Staff_side::support_height() const
  41 {
  42     Interval r;
  43
  44     for (int i=0; i < support_l_arr_.size(); i++)
  45         r.unite(support_l_arr_[i]->height());
  46     if (r.empty_b()) {
  47         r = Interval(0,0);
  48     }
  49     return r;
  50 }
  51
  52 void
  53 Staff_side::add_support(Score_elem*i)
  54 {
  55     support_l_arr_.push(i);
  56     add_dependency(i);
  57 }
  58
  59 int
  60 Staff_side::get_position_i()const
  61 {
  62     if (!dir_i_) {
  63         warning("Staff_side::get_position_i(): "
  64                 "somebody forgot to set my vertical direction, returning -20");
  65         return -20;
  66     }
  67
  68
  69     Real y=0;
  70     Real inter_f = paper()-> internote_f();
  71     if (!inside_staff_b_) {
  72         y  = (dir_i_ > 0 && staff_sym_l_) ? staff_sym_l_->steps_i() + 2: -2;
  73         y *=inter_f;
  74         Interval v= support_height();
  75
  76         if (dir_i_ > 0) {
  77             y = y >? (v.max() + 2*inter_f);
  78         } else if (dir_i_ < 0) {
  79             y = y <? (v.min() - 2*inter_f);
  80         }
  81     } else {
  82         Interval v= support_height();
  83         y = v[dir_i_]  + 2*dir_i_*inter_f;      // ugh
  84     }
  85     return int(rint(Real(y)/inter_f)); // should ret a float?
  86 }
  87
  88 int
  89 Staff_side::get_position_i(Interval sym_dim) const
  90 {
  91     int i= get_position_i();
  92     return i+ int(rint(- sym_dim[-dir_i_] / paper()->internote_f()));
  93 }
  94
  95
  96 void
  97 Staff_side::do_substitute_dependency(Score_elem*o, Score_elem*n )
  98 {
  99     int i;
 100     while ((i=support_l_arr_.find_i(o) ) >=0)
 101         if (n)
 102             support_l_arr_[i] = n;
 103         else
 104             support_l_arr_.del(i);
 105
 106     if (staff_sym_l_ == o)
 107         staff_sym_l_ = n ? (Staff_symbol*) n->spanner():0;
 108 }
 109
 110 IMPLEMENT_STATIC_NAME(Staff_side);
 111 IMPLEMENT_IS_TYPE_B1(Staff_side, Score_elem);