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 "side-position-interface.hh"
  11 #include "dimension-cache.hh"
  12 #include "group-interface.hh"
  13
  14 void
  15 Script_column::add_staff_sided (Item *i)
  16 {
  17   SCM p = i->get_elt_property ("script-priority");
  18   if (!gh_number_p (p))
  19     return;
  20
  21
  22   Group_interface gi (this, "scripts");
  23   gi.add_element (i);
  24
  25   add_dependency (i);
  26 }
  27
  28 Script_column::Script_column ()
  29 {
  30   set_elt_property ("scripts", SCM_EOL);
  31 }
  32
  33 static int
  34 staff_side_compare (Item * const &i1,
  35                     Item * const &i2)
  36 {
  37   SCM p1 = i1->get_elt_property ("script-priority");
  38   SCM p2 = i2->get_elt_property ("script-priority");
  39
  40   return gh_scm2int (p1) - gh_scm2int (p2);
  41 }
  42
  43 void
  44 Script_column::do_pre_processing ()
  45 {
  46   Drul_array<Link_array<Item> > arrs;
  47   Link_array<Item> staff_sided
  48     = Group_interface__extract_elements (this, (Item*)0, "scripts");
  49
  50
  51   for (int i=0; i < staff_sided.size (); i++)
  52     {
  53       Side_position_interface st (staff_sided[i]);
  54       arrs[st.get_direction ()].push (staff_sided[i]);
  55     }
  56
  57   Direction d = DOWN;
  58   do {
  59     Link_array<Item> &arr(arrs[d]);
  60
  61     arr.sort (staff_side_compare);
  62
  63     Item * last = 0;
  64     for (int i=0; i < arr.size (); i++)
  65       {
  66         Side_position_interface s (arr[i]);
  67         if (last)
  68           {
  69             s.add_support (last);
  70           }
  71
  72         arr[i]->remove_elt_property ("script-priority");
  73         last = arr[i];
  74       }
  75
  76   } while (flip (&d) != DOWN);
  77 }
  78