/*
  music.hh -- declare Music

  source file of the GNU LilyPond music typesetter

  (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/

#ifndef MUSIC_HH
#define MUSIC_HH

#include "virtual-methods.hh"
#include "smobs.hh"
#include "moment.hh"
#include "pitch.hh"

#define is_mus_type(x) internal_is_music_type (ly_symbol2scm (x))

class Music
{
public:
  Music (SCM init);
  Music (Music const &m);
  VIRTUAL_COPY_CONSTRUCTOR (Music, Music);

  Input *origin () const;
  void set_spot (Input);

  SCM internal_get_property (SCM) const;
  void internal_set_property (SCM, SCM val);
  SCM internal_get_object (SCM) const;
  void internal_set_object (SCM, SCM val);
  SCM get_property_alist (bool mutble) const;
  bool internal_is_music_type (SCM) const;

  DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  Pitch to_relative_octave (Pitch);
  Pitch generic_to_relative_octave (Pitch);
  String name () const;
  Moment get_length () const;
  Moment start_mom () const;
  void print () const;

  /// Transpose, with the interval central C to #p#
  void transpose (Pitch p);

  /// Scale the music in time by #factor#.
  void compress (Moment factor);

  DECLARE_SCHEME_CALLBACK (duration_length_callback, (SCM));
protected:
  DECLARE_SMOBS (Music,);

  SCM immutable_property_alist_;
  SCM mutable_property_alist_;
protected:
  SCM length_callback_;
  SCM start_callback_;
  friend SCM ly_extended_make_music (SCM, SCM);
};

DECLARE_TYPE_P (Music);
DECLARE_UNSMOB (Music, music);

Music *make_music_by_name (SCM sym);
SCM ly_music_deep_copy (SCM);

#endif /* MUSIC_HH */
