lily/separation-item.cc

   1 /*
   2   single-malt-grouping-item.cc --  implement Separation_item
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "separation-item.hh"
  11 #include "paper-column.hh"
  12 #include "debug.hh"
  13 #include "group-interface.hh"
  14
  15 void
  16 Separation_item::set_interface (Grob*s)
  17 {
  18   s->set_extent_callback (SCM_EOL, X_AXIS);
  19   s->set_extent_callback (SCM_EOL, Y_AXIS);
  20 }
  21
  22 void
  23 Separation_item::add_item (Grob*s,Item* i)
  24 {
  25   assert (i);
  26   Pointer_group_interface::add_element (s,"elements",i);
  27   s->add_dependency (i);
  28 }
  29
  30 Interval
  31 Separation_item::my_width (Grob *me)
  32 {
  33   Item *item = dynamic_cast<Item*> (me);
  34   Paper_column * pc = item->column_l ();
  35   Interval w;
  36
  37   for (SCM s =  me->get_grob_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
  38     {
  39       SCM elt = gh_car (s);
  40       if (!unsmob_grob (elt))
  41         continue;
  42
  43       Item *il = dynamic_cast<Item*> (unsmob_grob (elt));
  44       if (pc != il->column_l ())
  45         {
  46           /* this shouldn't happen, but let's continue anyway. */
  47           programming_error (_ ("Separation_item:  I've been drinking too much"));
  48           continue;             /*UGH UGH*/
  49         }
  50
  51       if (to_boolean (il->get_grob_property ("no-spacing-rods")))
  52         {
  53           continue;
  54         }
  55
  56       Interval iv (il->extent (pc, X_AXIS));
  57       if (!iv.empty_b ())
  58         {
  59           w.unite (iv);
  60         }
  61     }
  62
  63   SCM pad = me->get_grob_property ("padding");
  64
  65   if (gh_number_p (pad))
  66   {
  67     w[RIGHT] += gh_scm2double (pad)/2;
  68     w[LEFT] -= gh_scm2double (pad)/2;
  69   }
  70
  71   return w;
  72  // add this->offset_ ? this-> relative_coordinate ()?
  73 }
  74
  75
  76