lily/spanner-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2007--2010 Han-Wen Nienhuys <hanwen@lilypond.org>
   5
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "spanner.hh"
  22 #include "item.hh"
  23
  24 LY_DEFINE (ly_spanner_bound, "ly:spanner-bound",
  25            2, 0, 0, (SCM spanner, SCM dir),
  26            "Get one of the bounds of @var{spanner}.  @var{dir} is @code{-1}"
  27            " for left, and @code{1} for right.")
  28 {
  29   LY_ASSERT_TYPE (unsmob_spanner, spanner, 1);
  30   LY_ASSERT_TYPE (is_direction, dir, 2);
  31
  32   return unsmob_spanner (spanner)->get_bound (to_dir (dir))->self_scm ();
  33 }
  34
  35 /* TODO: maybe we should return a vector -- random access is more
  36    logical for this list? */
  37 LY_DEFINE (ly_spanner_broken_into, "ly:spanner-broken-into",
  38            1, 0, 0, (SCM spanner),
  39            "Return broken-into list for @var{spanner}.")
  40 {
  41   LY_ASSERT_TYPE (unsmob_spanner, spanner, 1);
  42   Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (spanner));
  43
  44   SCM s = SCM_EOL;
  45   for (vsize i = me->broken_intos_.size (); i--;)
  46     s = scm_cons (me->broken_intos_[i]->self_scm (), s);
  47   return s;
  48 }
  49
  50 LY_DEFINE (ly_spanner_p, "ly:spanner?",
  51            1, 0, 0, (SCM g),
  52            "Is @var{g} a spanner object?")
  53 {
  54   Grob *me = unsmob_grob (g);
  55   bool b = dynamic_cast<Spanner *> (me);
  56
  57   return ly_bool2scm (b);
  58 }