lily/script-column.cc

   1 /*
   2   script-column.cc --  implement Script_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "script-column.hh"
  10 #include "side-position-interface.hh"
  11
  12 #include "group-interface.hh"
  13
  14 void
  15 Script_column::add_staff_sided (Grob *me, Item *i)
  16 {
  17   SCM p = i->get_grob_property ("script-priority");
  18   if (!gh_number_p (p))
  19     return;
  20
  21   Pointer_group_interface::add_element (me, "scripts",i);
  22
  23   me->add_dependency (i);
  24 }
  25
  26 static int
  27 staff_side_compare (Grob * const &i1,
  28                     Grob * const &i2)
  29 {
  30   SCM p1 = i1->get_grob_property ("script-priority");
  31   SCM p2 = i2->get_grob_property ("script-priority");
  32
  33   return gh_scm2int (p1) - gh_scm2int (p2);
  34 }
  35
  36 MAKE_SCHEME_CALLBACK(Script_column,before_line_breaking,1);
  37
  38 SCM
  39 Script_column::before_line_breaking (SCM smob)
  40 {
  41   Grob* me = unsmob_grob (smob);
  42   Drul_array<Link_array<Grob> > arrs;
  43   Link_array<Grob> staff_sided
  44     = Pointer_group_interface__extract_elements (me, (Grob*)0, "scripts");
  45
  46
  47   for (int i=0; i < staff_sided.size (); i++)
  48     {
  49       arrs[Side_position::get_direction (staff_sided[i])]
  50         .push (staff_sided[i]);
  51     }
  52
  53   Direction d = DOWN;
  54   do {
  55     Link_array<Grob> &arr(arrs[d]);
  56
  57     arr.sort (staff_side_compare);
  58
  59     Grob * last = 0;
  60     for (int i=0; i < arr.size (); i++)
  61       {
  62
  63         if (last)
  64           Side_position::add_support( arr[i],last);
  65
  66         arr[i]->remove_grob_property ("script-priority");
  67         last = arr[i];
  68       }
  69
  70   } while (flip (&d) != DOWN);
  71
  72   return SCM_UNSPECIFIED;
  73 }
  74