lily/note-column.cc

   1 /*
   2   note-column.cc -- implement Note_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include <math.h>               // ceil
   9
  10 #include "axis-group-interface.hh"
  11 #include "note-column.hh"
  12 #include "stem.hh"
  13 #include "debug.hh"
  14 #include "paper-def.hh"
  15 #include "group-interface.hh"
  16 #include "staff-symbol-referencer.hh"
  17 #include "rest.hh"
  18 #include "note-head.hh"
  19
  20 bool
  21 Note_column::rest_b (Grob*me)
  22 {
  23   return unsmob_grob (me->get_grob_property ("rest"));
  24 }
  25
  26 int
  27 Note_column::shift_compare (Grob *const &p1, Grob *const&p2)
  28 {
  29   SCM s1 = p1->get_grob_property ("horizontal-shift");
  30   SCM s2 = p2->get_grob_property ("horizontal-shift");
  31
  32   int h1 = (gh_number_p (s1))?  gh_scm2int (s1) :0;
  33   int h2 = (gh_number_p (s2)) ? gh_scm2int (s2):0;
  34   return h1 - h2;
  35 }
  36
  37 void
  38 Note_column::set_interface (Grob* me)
  39 {
  40   me->set_grob_property ("note-heads", SCM_EOL);
  41   me->set_interface (ly_symbol2scm ("note-column-interface"));
  42
  43   Axis_group_interface::set_interface (me);
  44   Axis_group_interface::set_axes (me, X_AXIS, Y_AXIS);
  45 }
  46
  47 Item *
  48 Note_column::stem_l (Grob*me)
  49 {
  50   SCM s = me->get_grob_property ("stem");
  51   return  dynamic_cast<Item*>(unsmob_grob (s));
  52 }
  53
  54 Slice
  55 Note_column::head_positions_interval(Grob *me)
  56 {
  57   Slice  iv;
  58
  59   iv.set_empty ();
  60
  61   SCM h = me->get_grob_property ("note-heads");
  62   for (; gh_pair_p (h); h = gh_cdr (h))
  63     {
  64       Grob *se = unsmob_grob (gh_car (h));
  65
  66       int j = int (Staff_symbol_referencer::position_f (se));
  67       iv.unite (Slice (j,j));
  68     }
  69   return iv;
  70 }
  71
  72 Direction
  73 Note_column::dir (Grob*  me)
  74 {
  75   Grob *stem = unsmob_grob (me->get_grob_property ("stem"));
  76   if (stem && Stem::has_interface (stem))
  77     return Stem::get_direction (stem);
  78   else if (gh_pair_p (me->get_grob_property ("note-heads")))
  79     return (Direction)sign (head_positions_interval (me).center ());
  80
  81   programming_error ("Note column without heads and stem!");
  82   return CENTER;
  83 }
  84
  85
  86 void
  87 Note_column::set_stem (Grob*me,Grob * stem_l)
  88 {
  89   me->set_grob_property ("stem", stem_l->self_scm ());
  90   me->add_dependency (stem_l);
  91   Axis_group_interface::add_element (me, stem_l);
  92 }
  93
  94 void
  95 Note_column::add_head (Grob*me,Grob *h)
  96 {
  97   if (Rest::has_interface (h))
  98     {
  99       me->set_grob_property ("rest", h->self_scm ());
 100     }
 101   else if (Note_head::has_interface (h))
 102     {
 103       Pointer_group_interface::add_element (me, "note-heads",h);
 104     }
 105   Axis_group_interface::add_element (me, h);
 106 }
 107
 108 /**
 109   translate the rest symbols vertically by amount DY_I.
 110  */
 111 void
 112 Note_column::translate_rests (Grob*me,int dy_i)
 113 {
 114   Grob * r = unsmob_grob (me->get_grob_property ("rest"));
 115   if (r)
 116     {
 117       r->translate_axis (dy_i * Staff_symbol_referencer::staff_space (r)/2.0, Y_AXIS);
 118     }
 119 }
 120
 121
 122 void
 123 Note_column::set_dotcol (Grob*me,Grob *d)
 124 {
 125   Axis_group_interface::add_element (me, d);
 126 }
 127
 128
 129
 130
 131 Grob*
 132 Note_column::first_head (Grob*me)
 133 {
 134   Grob * st = stem_l (me);
 135   return st?  Stem::first_head (st): 0;
 136 }
 137
 138 bool
 139 Note_column::has_interface (Grob*me)
 140 {
 141   return me && me->has_interface (ly_symbol2scm ("note-column-interface"));
 142 }