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   pos_i_ =0;
  26   sym_int_ = Interval (0,0);
  27   staff_size_i_ = 0;
  28   staff_sym_l_ = 0;
  29   dir_ = CENTER;
  30   inside_staff_b_ = false;
  31 }
  32
  33 void
  34 Staff_side::read_staff_sym()
  35 {
  36   if (! staff_sym_l_)
  37     return ;
  38   staff_size_i_ = staff_sym_l_->steps_i();
  39 }
  40
  41
  42 Interval
  43 Staff_side::support_height() const
  44 {
  45   Interval r;
  46
  47   for (int i=0; i < support_l_arr_.size(); i++)
  48     r.unite (support_l_arr_[i]->height());
  49   if (r.empty_b())
  50     {
  51       r = Interval (0,0);
  52     }
  53   return r;
  54 }
  55
  56 void
  57 Staff_side::add_support (Score_elem*i)
  58 {
  59   support_l_arr_.push (i);
  60   add_dependency (i);
  61 }
  62
  63 int
  64 Staff_side::get_position_i() const
  65 {
  66   if (!dir_)
  67     {
  68       warning (_("Staff_side::get_position_i(): "
  69                "somebody forgot to set my vertical direction, returning -20"));
  70       return -20;
  71     }
  72
  73
  74   Real y=0;
  75   Real inter_f = paper()-> internote_f ();
  76   if (!inside_staff_b_)
  77     {
  78       y  = (staff_sym_l_) ? dir_ * (staff_sym_l_->steps_i()/2 + 2) : -2;
  79       y *=inter_f;
  80
  81       Interval v= support_height();
  82
  83       if (dir_ > 0)
  84         {
  85           y = y >? (v.max() + 2*inter_f);
  86         }
  87       else if (dir_ < 0)
  88         {
  89           y = y <? (v.min() - 2*inter_f);
  90         }
  91     }
  92   else
  93     {
  94       Interval v= support_height();
  95       y = v[dir_]  + 2*dir_*inter_f;    // ugh
  96     }
  97   return int (rint (Real (y)/inter_f)); // should ret a float?
  98 }
  99
 100 Interval
 101 Staff_side::symbol_height() const
 102 {
 103   return Interval (0,0);
 104 }
 105
 106 void
 107 Staff_side::do_post_processing()
 108 {
 109   sym_int_ = symbol_height();
 110   pos_i_ = get_position_i();
 111   if (dir_)
 112     pos_i_ += int (rint (- sym_int_[-dir_] / paper()->internote_f ()));
 113 }
 114
 115 void
 116 Staff_side::do_substitute_dependency (Score_elem*o, Score_elem*n)
 117 {
 118   support_l_arr_.unordered_substitute (o,n);
 119   if (staff_sym_l_ == o)
 120     staff_sym_l_ = n ? (Staff_symbol*) n->spanner():0;
 121 }
 122
 123
 124 IMPLEMENT_IS_TYPE_B1(Staff_side, Score_elem);