lily/axis-group-interface-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "axis-group-interface.hh"
  21 #include "lily-guile.hh"
  22 #include "grob.hh"
  23 #include "grob-array.hh"
  24
  25 LY_DEFINE (ly_relative_group_extent, "ly:relative-group-extent",
  26            3, 0, 0, (SCM elements, SCM common, SCM axis),
  27            "Determine the extent of @var{elements} relative to @var{common} in the"
  28            " @var{axis} direction.")
  29 {
  30   Grob_array *ga = unsmob_grob_array (elements);
  31
  32   SCM_ASSERT_TYPE (ga || scm_is_pair (elements), elements, SCM_ARG1, __FUNCTION__, "list or Grob_array");
  33   LY_ASSERT_SMOB (Grob, common, 2);
  34   LY_ASSERT_TYPE (is_axis, axis, 3);
  35
  36   vector<Grob*> elts;
  37   if (!ga)
  38     {
  39       for (SCM s = elements; scm_is_pair (s); s = scm_cdr (s))
  40         elts.push_back (unsmob_grob (scm_car (s)));
  41     }
  42
  43   Interval ext = Axis_group_interface::relative_group_extent (ga ? ga->array () : elts,
  44                                                               unsmob_grob (common),
  45                                                               (Axis) scm_to_int (axis));
  46   return ly_interval2scm (ext);
  47 }
  48
  49 LY_DEFINE (ly_axis_group_interface__add_element, "ly:axis-group-interface::add-element",
  50            2, 0, 0, (SCM grob, SCM grob_element),
  51            "Set @var{grob} the parent of @var{grob-element} on all axes of"
  52            " @var{grob}.")
  53 {
  54   LY_ASSERT_SMOB (Grob, grob, 1);
  55   LY_ASSERT_SMOB (Grob, grob_element, 2);
  56   Axis_group_interface::add_element (unsmob_grob (grob), unsmob_grob (grob_element));
  57   return SCM_UNSPECIFIED;
  58 }