lily/pointer-group-interface.cc

   1 /*
   2   pointer-group-interface.cc -- implement Pointer_group_interface
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "pointer-group-interface.hh"
  10
  11 #include "grob-array.hh"
  12 #include "grob.hh"
  13
  14 int
  15 Pointer_group_interface::count (Grob *me, SCM sym)
  16 {
  17   Grob_array *arr = unsmob_grob_array (me->internal_get_object (sym));
  18   return arr ? arr->size () : 0;
  19 }
  20
  21 void
  22 Pointer_group_interface::add_grob (Grob *me, SCM sym, SCM p)
  23 {
  24   add_grob (me, sym, unsmob_grob (p));
  25 }
  26
  27 void
  28 Pointer_group_interface::set_ordered (Grob *me, SCM sym, bool ordered)
  29 {
  30   Grob_array *arr = get_grob_array (me, sym);
  31   arr->set_ordered (ordered);
  32 }
  33
  34 Grob_array *
  35 Pointer_group_interface::get_grob_array (Grob *me, SCM sym)
  36 {
  37   SCM scm_arr = me->internal_get_object (sym);
  38   Grob_array *arr = unsmob_grob_array (scm_arr);
  39   if (!arr)
  40     {
  41       scm_arr = Grob_array::make_array ();
  42       arr = unsmob_grob_array (scm_arr);
  43       me->set_object (sym, scm_arr);
  44     }
  45   return arr;
  46 }
  47
  48 Grob *
  49 Pointer_group_interface::find_grob (Grob *me, SCM sym, bool (*pred) (Grob*))
  50 {
  51   Grob_array *arr = get_grob_array (me, sym);
  52
  53   for (vsize i = 0; i < arr->size (); i++)
  54     if (pred (arr->grob (i)))
  55       return arr->grob (i);
  56
  57   return 0;
  58 }
  59
  60 void
  61 Pointer_group_interface::add_grob (Grob *me, SCM sym, Grob *p)
  62 {
  63   Grob_array *arr = get_grob_array (me, sym);
  64   arr->add (p);
  65 }
  66
  67 void
  68 Pointer_group_interface::add_unordered_grob (Grob *me, SCM sym, Grob *p)
  69 {
  70   Grob_array *arr = get_grob_array (me, sym);
  71   arr->add (p);
  72   arr->set_ordered (false);
  73 }
  74
  75 static vector<Grob*> empty_array;
  76
  77 vector<Grob*> const &
  78 ly_scm2link_array (SCM x)
  79 {
  80   Grob_array *arr = unsmob_grob_array (x);
  81   return arr ? arr->array () : empty_array;
  82 }
  83
  84 vector<Grob*> const &
  85 internal_extract_grob_array (Grob const *elt, SCM symbol)
  86 {
  87   return elt
  88     ? ly_scm2link_array (elt->internal_get_object (symbol))
  89     : empty_array;
  90 }
  91
  92 vector<Item*>
  93 internal_extract_item_array (Grob const *elt, SCM symbol)
  94 {
  95   Grob_array *arr = unsmob_grob_array (elt->internal_get_object (symbol));
  96   vector<Item*> items;
  97   for (vsize i = 0; arr && i < arr->size (); i++)
  98     items.push_back (arr->item (i));
  99
 100   return items;
 101 }