source file of the GNU LilyPond music typesetter
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef SEQUENTIAL_MUSIC_ITERATOR_HH
#define SEQUENTIAL_MUSIC_ITERATOR_HH
-#include "music-iterator.hh"
-
-
-/*
-
- This is a lookahead list for grace notes.
-
- { ... X \grace Y Z ... }
-
- normally, the ending of X is the start of Z. In case of a grace
- note, we take off a little at the end of X. What is stored: START
- (start point of X), LENGTH (length of X), GRACE_START (start_music
- of Y), and the next fixup element.
-
- This is also done for nested musics, i.e.
-
- voiceA = \notes { \grace b16 c'2 }
- voiceB = \notes { c'2 \voiceA }
-
- the iterator for voiceB will contain a fixup entry with (START=0/1,
- LENGTH=2/1, GRACE_START=(0G-1/16) )
-
- Graces at the start of a sequential music iterator are handled
- by initting here_mom_ with Music::start_music (); no fixups are needed.
-
-*/
-struct Grace_fixup
-{
- Moment start_;
- Moment length_;
-
- Rational grace_start_;
- Grace_fixup *next_;
-};
+#include "sequential-iterator.hh"
/** Sequential_music iteration: walk each element in turn, and
construct an iterator for every element.
*/
-class Sequential_music_iterator : public Music_iterator
+class Sequential_music_iterator : public Sequential_iterator
{
public:
- Grace_fixup * grace_fixups_;
-
VIRTUAL_COPY_CONS (Music_iterator);
- static SCM constructor_cxx_function;
- Sequential_music_iterator ();
- Sequential_music_iterator (Sequential_music_iterator const&);
- virtual ~Sequential_music_iterator ();
-
- virtual void construct_children ();
- virtual Moment pending_moment () const;
- virtual bool ok () const;
- virtual void skip (Moment);
- virtual SCM get_music (Moment)const;
-
-protected:
- virtual void process (Moment);
- virtual Music_iterator *try_music_in_children (Music *) const;
-
+ DECLARE_SCHEME_CALLBACK(constructor, ());
private:
- Moment here_mom_;
- SCM cursor_;
- Music_iterator * iter_p_;
-
- void next_element ();
- void descend_to_child ();
+ virtual SCM get_music_list()const;
};
#endif // SEQUENTIAL_MUSIC_ITERATOR_HH