lily/g-script-column.cc

   1 /*
   2   g-script-column.cc --  implement G_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 "g-script-column.hh"
  10 #include "g-staff-side.hh"
  11
  12 static G_staff_side_item *
  13 get_g_staff_side (Item *i)
  14 {
  15   Graphical_element *e1 = i->dim_cache_[Y_AXIS]->parent_l_->element_l ();
  16
  17   return dynamic_cast<G_staff_side_item*>(e1);
  18 }
  19
  20 void
  21 G_script_column::add_staff_sided (Item *i)
  22 {
  23   SCM p = get_g_staff_side (i)->get_elt_property (script_priority_scm_sym);
  24   if (p == SCM_BOOL_F)
  25     return;
  26
  27   staff_sided_item_l_arr_.push (i);
  28   add_dependency (i);
  29 }
  30
  31 static int
  32 staff_side_compare (Item * const &i1,
  33                     Item * const &i2)
  34 {
  35   Score_element *e1 = get_g_staff_side (i1);
  36   Score_element *e2 = get_g_staff_side (i2);
  37
  38   SCM p1 = e1->get_elt_property (script_priority_scm_sym);
  39   SCM p2 = e2->get_elt_property (script_priority_scm_sym);
  40
  41   return gh_scm2int (SCM_CDR(p1)) - gh_scm2int (SCM_CDR(p2));
  42 }
  43
  44 void
  45 G_script_column::do_pre_processing ()
  46 {
  47   Drul_array<Link_array<Item> > arrs;
  48
  49   for (int i=0; i < staff_sided_item_l_arr_.size (); i++)
  50     {
  51       G_staff_side_item * ip = get_g_staff_side (staff_sided_item_l_arr_[i]);
  52       arrs[ip->dir_].push (staff_sided_item_l_arr_[i]);
  53     }
  54
  55   Direction d = DOWN;
  56   do {
  57     Link_array<Item> &arr(arrs[d]);
  58
  59     arr.sort (staff_side_compare);
  60
  61     Item * last = 0;
  62     for (int i=0; i < arr.size (); i++)
  63       {
  64         G_staff_side_item * gs = get_g_staff_side (arr[i]);
  65         if (last)
  66           {
  67             gs->add_support (last);
  68             gs->add_support (get_g_staff_side (last));
  69           }
  70
  71         gs->remove_elt_property (script_priority_scm_sym);
  72         last = arr[i];
  73       }
  74
  75   } while (flip (&d) != DOWN);
  76 }