lily/group-interface.cc

   1 /*
   2   group-interface.cc --  implement 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 Group_interface::Group_interface (Score_element const* e)
  13 {
  14   elt_l_ = (Score_element*)e;
  15   name_ = "elements";
  16 }
  17
  18
  19 Group_interface::Group_interface (Score_element const *e, String s)
  20 {
  21   elt_l_ =(Score_element*)e;
  22   name_ = s;
  23 }
  24 bool
  25 Group_interface::has_interface ()
  26 {
  27   SCM el = elt_l_->get_elt_property (name_.ch_C());
  28
  29   return el == SCM_EOL || gh_pair_p (el);
  30 }
  31
  32
  33
  34 void
  35 Group_interface::add_thing (SCM s)
  36 {
  37   elt_l_->set_elt_property (name_.ch_C (),
  38                             gh_cons (s, elt_l_->get_elt_property (name_.ch_C())));
  39 }
  40
  41
  42 int
  43 Group_interface::count ()
  44 {
  45   return scm_ilength (elt_l_->get_elt_property (name_.ch_C()));
  46 }
  47
  48 void
  49 Group_interface::set_interface ()
  50 {
  51   if (!has_interface ())
  52     {
  53       elt_l_->set_elt_property (name_.ch_C (), SCM_EOL);
  54     }
  55 }
  56