lily/paper-column.cc

   1 /*
   2   paper-column.cc -- implement Paper_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "moment.hh"
   9 #include "paper-column.hh"
  10 #include "paper-score.hh"
  11 #include "debug.hh"
  12 #include "axis-group-interface.hh"
  13 #include "spaceable-grob.hh"
  14
  15 void
  16 Paper_column::do_break_processing ()
  17 {
  18   Spaceable_grob::remove_interface (this);
  19   Item::do_break_processing ();
  20 }
  21
  22 int
  23 Paper_column::rank_i (Grob*me)
  24 {
  25   return dynamic_cast<Paper_column*> (me)->rank_i_;
  26 }
  27
  28 Line_of_score*
  29 Paper_column::line_l () const
  30 {
  31   return line_l_;
  32 }
  33
  34 Paper_column*
  35 Paper_column::column_l () const
  36 {
  37   return (Paper_column*) (this);
  38 }
  39
  40 Paper_column::Paper_column (SCM l)
  41   : Item (l)            // guh.?
  42 {
  43   Axis_group_interface::set_interface (this);
  44   Axis_group_interface::set_axes (this, X_AXIS, X_AXIS);
  45   Spaceable_grob::set_interface (this);
  46
  47   line_l_=0;
  48   rank_i_ = -1;
  49 }
  50
  51 Moment
  52 Paper_column::when_mom (Grob*me)
  53 {
  54   SCM m = me->get_grob_property ("when");
  55   Moment s (0);
  56   if (unsmob_moment (m))
  57     {
  58       return *unsmob_moment (m);
  59     }
  60   return s;
  61 }
  62
  63 bool
  64 Paper_column::musical_b (Grob *me)
  65 {
  66   SCM m = me->get_grob_property ("shortest-starter-duration");
  67   Moment s (0);
  68   if (unsmob_moment (m))
  69     {
  70       s = *unsmob_moment (m);
  71     }
  72   return s != Moment (0);
  73
  74 }
  75
  76 bool
  77 Paper_column::used_b (Grob*me)
  78 {
  79   return gh_pair_p (me->get_grob_property ("elements")) ||  Item::breakable_b (me)
  80     || gh_pair_p (me->get_grob_property ("bounded-by-me"))
  81     ;
  82 }