lily/include/beaming-pattern.hh

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--2010 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 #ifndef BEAMING_PATTERN_HH
  21 #define BEAMING_PATTERN_HH
  22
  23 #include "std-vector.hh"
  24 #include "moment.hh"
  25 #include "lily-proto.hh"
  26
  27 struct Beaming_options
  28 {
  29   SCM grouping_;
  30   bool subdivide_beams_;
  31   Moment base_moment_;
  32   Moment measure_length_;
  33
  34   Beaming_options ();
  35   void from_context (Context*);
  36 };
  37
  38 struct Beam_rhythmic_element
  39 {
  40   Moment start_moment_;
  41   Drul_array<int> beam_count_drul_;
  42
  43   int rhythmic_importance_;
  44   bool invisible_;
  45
  46   Beam_rhythmic_element (Moment, int, bool);
  47   Beam_rhythmic_element ();
  48
  49   int count (Direction d) const;
  50   void de_grace ();
  51 };
  52
  53 /*
  54   Generate beaming given durations of notes. Beam uses this to
  55   set_beaming () for each of its stems.
  56 */
  57 class Beaming_pattern
  58 {
  59 public:
  60   Beaming_pattern ();
  61
  62   void beamify (Beaming_options const&);
  63   void de_grace ();
  64   void add_stem (Moment d, int beams, bool invisible);
  65   int beamlet_count (int idx, Direction d) const;
  66   bool invisibility (int idx) const;
  67   Moment start_moment (int idx) const;
  68   Moment end_moment (int idx) const;
  69   Beaming_pattern* split_pattern(int idx);
  70
  71 private:
  72   vector<Beam_rhythmic_element> infos_;
  73   Direction flag_direction (Beaming_options const&, vsize) const;
  74   void find_rhythmic_importance (Beaming_options const&);
  75   void unbeam_invisible_stems ();
  76 };
  77
  78 #endif /* BEAMING_PATTERN_HH */