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
  17 Staff_side::Staff_side()
  18 {
  19   y_=0;
  20   sym_int_ = Interval (0,0);
  21   dir_ = CENTER;
  22 }
  23
  24
  25 Interval
  26 Staff_side::support_height() const
  27 {
  28   Interval y_int;
  29   for (int i=0; i < support_l_arr_.size(); i++)
  30     {
  31       Axis_group_element *common =
  32         common_group (support_l_arr_[i], Y_AXIS);
  33
  34       Real y = support_l_arr_[i]->relative_coordinate (common, Y_AXIS)
  35         -relative_coordinate (common,Y_AXIS);
  36
  37       y_int.unite (y + support_l_arr_[i]->height());
  38     }
  39
  40
  41   if (y_int.empty_b())
  42     {
  43       y_int = Interval (0,0);
  44     }
  45   return y_int;
  46 }
  47
  48 void
  49 Staff_side::add_support (Score_elem*i)
  50 {
  51   support_l_arr_.push (i);
  52   add_dependency (i);
  53 }
  54
  55 Real
  56 Staff_side::get_position_f () const
  57 {
  58   if (!dir_)
  59     {
  60       warning (_("Staff_side::get_position_f(): "
  61                  "somebody forgot to set my vertical direction, returning -20"));
  62       return -20;
  63     }
  64
  65
  66   Real y = 0;
  67   Real inter_f = paper()-> internote_f ();
  68
  69   Interval v = support_height();
  70
  71   // ugh, dim[y] = PT over here
  72   y = v[dir_] + 1 * dir_ * inter_f;
  73
  74   int y_i = (int)rint (y / inter_f);
  75   // ugh: 5 -> staff_lines
  76   if (abs (y_i) < 5)
  77     {
  78       if (!(abs (y_i) % 2))
  79         y += (Real)dir_ * inter_f;
  80     }
  81 //  else
  82 //    y = v[dir_] + 1 * dir_ * inter_f;
  83
  84   return y;
  85 }
  86
  87 Interval
  88 Staff_side::symbol_height() const
  89 {
  90   return Interval (0,0);
  91 }
  92
  93 void
  94 Staff_side::do_post_processing()
  95 {
  96   sym_int_ = symbol_height();
  97   y_ = get_position_f();
  98   if (dir_)
  99     y_ += - sym_int_[-dir_];
 100 }
 101
 102 void
 103 Staff_side::do_substitute_dependency (Score_elem*o, Score_elem*n)
 104 {
 105   support_l_arr_.unordered_substitute (o,n);
 106 }
 107
 108
 109 IMPLEMENT_IS_TYPE_B1(Staff_side, Score_elem);