lily/pointer-group-interface.cc

   1 /*
   2   group-interface.cc --  implement Pointer_group_interface
   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 "group-interface.hh"
  10 #include "score-element.hh"
  11
  12 Pointer_group_interface::Pointer_group_interface (Score_element const* e)
  13 {
  14   elt_l_ = (Score_element*)e;
  15   name_ = "elements";
  16 }
  17
  18
  19 Pointer_group_interface::Pointer_group_interface (Score_element const *e, String s)
  20 {
  21   elt_l_ =(Score_element*)e;
  22   name_ = s;
  23 }
  24 bool
  25 Pointer_group_interface::has_interface_b ()
  26 {
  27   SCM el = elt_l_->get_elt_pointer (name_.ch_C());
  28
  29   return el == SCM_EOL || gh_pair_p (el);
  30 }
  31
  32
  33 void
  34 Pointer_group_interface::add_element (Score_element*p)
  35 {
  36   p->used_b_ =  true;
  37   elt_l_->used_b_ = true;
  38
  39   elt_l_->set_elt_pointer (name_.ch_C(),
  40                            gh_cons (p->self_scm_,
  41                                     elt_l_->get_elt_pointer (name_.ch_C())));
  42 }
  43
  44 int
  45 Pointer_group_interface::count ()
  46 {
  47   return scm_ilength (elt_l_->get_elt_pointer (name_.ch_C()));
  48 }
  49
  50 void
  51 Pointer_group_interface::set_interface ()
  52 {
  53   if (!has_interface_b ())
  54     {
  55       elt_l_->set_elt_pointer (name_.ch_C(), SCM_EOL);
  56     }
  57 }
  58