lily/beam-setting-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2009--2010 Carl Sorensen <c_sorensen@byu.edu>
   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 "beam-settings.hh"
  21 #include "context.hh"
  22 #include "guile-compatibility.hh"
  23
  24 LY_DEFINE (ly_grouping_rules, "ly:grouping-rules",
  25            3, 0, 0, (SCM settings, SCM time_signature, SCM rule_type),
  26            "Return grouping rules for @var{time-signature} and"
  27            " @var{rule-type} from @var{settings}.")
  28 {
  29   LY_ASSERT_TYPE (ly_cheap_is_list, settings, 1);
  30   LY_ASSERT_TYPE (scm_is_pair, time_signature, 2);
  31   LY_ASSERT_TYPE (ly_is_symbol, rule_type, 3);
  32
  33   SCM grouping_rules = SCM_EOL;
  34   if (scm_is_pair (settings))
  35     grouping_rules =
  36         ly_assoc_get (scm_list_2 (time_signature, rule_type),
  37                       settings,
  38                       SCM_EOL);
  39   return grouping_rules;
  40 }
  41
  42 LY_DEFINE (ly_beam_grouping, "ly:beam-grouping",
  43            4, 0, 0, (SCM settings, SCM time_signature, SCM rule_type,
  44                      SCM beam_type),
  45            "Return grouping for beams of @var{beam-type} in"
  46            " @var{time-signature} for"
  47            " @var{rule-type} from @var{settings}.")
  48 {
  49   LY_ASSERT_TYPE (ly_cheap_is_list, settings, 1);
  50   LY_ASSERT_TYPE (scm_is_pair, time_signature, 2);
  51   LY_ASSERT_TYPE (ly_is_symbol, rule_type, 3);
  52   SCM_ASSERT_TYPE (scm_is_symbol(beam_type) || scm_is_pair(beam_type),
  53                    beam_type, SCM_ARG4, __FUNCTION__, "symbol or pair");
  54   SCM beam_grouping =
  55         ly_assoc_get (beam_type,
  56                       ly_grouping_rules (settings,time_signature,rule_type),
  57                       SCM_EOL);
  58   return beam_grouping;
  59 }
  60
  61 LY_DEFINE (ly_beat_grouping, "ly:beat-grouping",
  62            1, 0, 0, (SCM context),
  63            "Return default beat grouping currently active in @var{context}.")
  64 {
  65   LY_ASSERT_SMOB (Context, context, 1);
  66   Context *c = unsmob_context (context);
  67   SCM time_signature =
  68         c->get_property ("timeSignatureFraction");
  69   SCM settings =
  70         c->get_property("beamSettings");
  71   SCM beat_grouping =
  72         ly_beam_grouping (settings,
  73                           time_signature,
  74                           ly_symbol2scm ("end"),
  75                           ly_symbol2scm ("*"));
  76   return beat_grouping;
  77 }
  78