lily/script-column.cc

   1 /*
   2   g-script-column.cc --  implement Script_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "script-column.hh"
  10 #include "staff-side.hh"
  11 #include "dimension-cache.hh"
  12
  13 static Staff_side_item *
  14 get_Staff_side (Item *i)
  15 {
  16   Graphical_element *e1 = i->parent_l(Y_AXIS);
  17
  18   return dynamic_cast<Staff_side_item*>(e1);
  19 }
  20
  21 void
  22 Script_column::add_staff_sided (Item *i)
  23 {
  24   SCM p = get_Staff_side (i)->get_elt_property ("script-priority");
  25   if (p == SCM_UNDEFINED)
  26     return;
  27
  28   staff_sided_item_l_arr_.push (i);
  29   add_dependency (i);
  30 }
  31
  32 static int
  33 staff_side_compare (Item * const &i1,
  34                     Item * const &i2)
  35 {
  36   Score_element *e1 = get_Staff_side (i1);
  37   Score_element *e2 = get_Staff_side (i2);
  38
  39   SCM p1 = e1->get_elt_property ("script-priority");
  40   SCM p2 = e2->get_elt_property ("script-priority");
  41
  42   return gh_scm2int (p1) - gh_scm2int (p2);
  43 }
  44
  45 void
  46 Script_column::do_pre_processing ()
  47 {
  48   Drul_array<Link_array<Item> > arrs;
  49
  50   for (int i=0; i < staff_sided_item_l_arr_.size (); i++)
  51     {
  52       Staff_side_item * ip = get_Staff_side (staff_sided_item_l_arr_[i]);
  53       arrs[ip->get_direction ()].push (staff_sided_item_l_arr_[i]);
  54     }
  55
  56   Direction d = DOWN;
  57   do {
  58     Link_array<Item> &arr(arrs[d]);
  59
  60     arr.sort (staff_side_compare);
  61
  62     Item * last = 0;
  63     for (int i=0; i < arr.size (); i++)
  64       {
  65         Staff_side_item * gs = get_Staff_side (arr[i]);
  66         if (last)
  67           {
  68             gs->add_support (last);
  69             gs->add_support (get_Staff_side (last));
  70           }
  71
  72         gs->remove_elt_property ("script-priority");
  73         last = arr[i];
  74       }
  75
  76   } while (flip (&d) != DOWN);
  77 }
  78