lily/spanner-scheme.cc

   1 /*
   2   spanner-scheme.cc -- implement Spanner bindings.
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2007--2009 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10 #include "spanner.hh"
  11 #include "item.hh"
  12
  13 LY_DEFINE (ly_spanner_bound, "ly:spanner-bound",
  14            2, 0, 0, (SCM spanner, SCM dir),
  15            "Get one of the bounds of @var{spanner}.  @var{dir} is @code{-1}"
  16            " for left, and @code{1} for right.")
  17 {
  18   LY_ASSERT_TYPE (unsmob_spanner, spanner, 1);
  19   LY_ASSERT_TYPE (is_direction, dir, 2);
  20
  21   return unsmob_spanner (spanner)->get_bound (to_dir (dir))->self_scm ();
  22 }
  23
  24 /* TODO: maybe we should return a vector -- random access is more
  25    logical for this list? */
  26 LY_DEFINE (ly_spanner_broken_into, "ly:spanner-broken-into",
  27            1, 0, 0, (SCM spanner),
  28            "Return broken-into list for @var{spanner}.")
  29 {
  30   LY_ASSERT_TYPE (unsmob_spanner, spanner, 1);
  31   Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (spanner));
  32
  33   SCM s = SCM_EOL;
  34   for (vsize i = me->broken_intos_.size (); i--;)
  35     s = scm_cons (me->broken_intos_[i]->self_scm (), s);
  36   return s;
  37 }
  38
  39 LY_DEFINE (ly_spanner_p, "ly:spanner?",
  40            1, 0, 0, (SCM g),
  41            "Is @var{g} a spanner object?")
  42 {
  43   Grob *me = unsmob_grob (g);
  44   bool b = dynamic_cast<Spanner *> (me);
  45
  46   return ly_bool2scm (b);
  47 }