/*
- Sequential_music_iterator.cc -- implement Sequential_music_iterator
+ sequential-music-iterator.cc -- implement Sequential_music_iterator
source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "grace-iterator.hh"
-#include "translator-group.hh"
-#include "debug.hh"
-#include "sequential-music-iterator.hh"
-#include "music-list.hh"
-#include "request-chord-iterator.hh"
-
-Sequential_music_iterator::Sequential_music_iterator ()
-{
- cursor_ = 0;
- here_mom_ = 0;
- iter_p_ =0;
-}
-
-Sequential_music_iterator::Sequential_music_iterator (Sequential_music_iterator const &src)
- : Music_iterator (src)
-{
- cursor_ = src.cursor_;
- here_mom_ = src.here_mom_;
- iter_p_ = src.iter_p_->clone ();
-}
-
-Sequential_music_iterator::~Sequential_music_iterator()
-{
- if (iter_p_)
- {
- /* if (iter_p_->ok () )
- music_l_->origin ()->warning (_ ("Must stop before this music ends"));
- */
- delete iter_p_;
- iter_p_ = 0;
- }
-}
-
-
-void
-Sequential_music_iterator::construct_children()
-{
- cursor_ = dynamic_cast<Music_sequence const*> (music_l_)->music_list ();
-
- while (gh_pair_p (cursor_ ))
- {
- start_next_element();
- if (!iter_p_->ok())
- {
- leave_element();
- }
- else
- {
- set_sequential_music_translator();
- break;
- }
- }
-}
-
-void
-Sequential_music_iterator::leave_element()
-{
- delete iter_p_;
- iter_p_ =0;
- Moment elt_time = unsmob_music (gh_car (cursor_))->length_mom ();
- here_mom_ += elt_time;
- cursor_ =gh_cdr (cursor_);
-}
-
-void
-Sequential_music_iterator::start_next_element()
-{
- assert (!iter_p_);
- iter_p_ = get_iterator_p (unsmob_music (gh_car (cursor_)));
-}
-
-void
-Sequential_music_iterator::set_sequential_music_translator()
-{
- Translator_group * child_report = child_report = iter_p_->report_to_l ();
- if (dynamic_cast<Grace_iterator*> (iter_p_))
- child_report = child_report->daddy_trans_l_;
-
- if (report_to_l()->depth_i () < child_report->depth_i ())
- set_translator (child_report);
-}
-
-/*
- [todo: translate]
-
- Hier staat in feite: haal alle muziek op (startend op tijd HERE) tot
- je iets met lengte L > 0 tegenkomt. Aangezien de preconditie is dat
- UNTIL het eerstvolgende event is, weet je (per definitie)
-
- L >= (UNTIL - HERE)
-
- en iets wat hierna komt (op tijd T) komt dus na tijd
-
- HERE + L >= HERE + (UNTIL - HERE) = UNTIL
- Dus als je een L>0 tegenkomt, wil je de rest niet meer. Aangezien
- alles wat tot nu toe hebt gespaard op HERE begint, is dat precies wat
- je nodig hebt.
+#include "context.hh"
+#include "sequential-music-iterator.hh"
+#include "music.hh"
+#include "warn.hh"
- Misschien kan je deze comment erbij stoppen, en moeten we de
- eigenschappen van het muziek datatype wat formaliseren, zodat deze
- redenering helderder is.
-*/
+IMPLEMENT_CTOR_CALLBACK (Sequential_music_iterator);
SCM
-Sequential_music_iterator::get_music (Moment until)const
-{
- SCM s = SCM_EOL;
- SCM curs = cursor_;
- Music_iterator * iter = iter_p_->clone ();
- while (1)
- {
- SCM nm = iter->get_music (until - here_mom_);
- s = gh_append2 (nm, s);
-
- Moment m = 0;
- for (SCM i = nm; gh_pair_p(i); i = gh_cdr (i))
- m = m >? unsmob_music (gh_car (i))->length_mom ();
-
- delete iter;
-
- curs = gh_cdr (curs);
-
- if (!gh_pair_p (curs) || m > Moment (0))
- return s;
- else
- {
- iter = get_iterator_p (unsmob_music (gh_car (curs)));
- }
- }
- return s;
-}
-
-void
-Sequential_music_iterator::process (Moment until)
-{
- if (ok ())
- {
- while (1)
- {
- Moment local_until = until - here_mom_;
- while (iter_p_->ok ())
- {
- Moment here = iter_p_->pending_moment ();
- if (here != local_until)
- return ;
-
- iter_p_->process (local_until);
- }
-
- if (!iter_p_->ok ())
- {
- set_sequential_music_translator ();
- leave_element ();
-
- if (gh_pair_p (cursor_))
- start_next_element ();
- else
- return ;
- }
- }
- }
-}
-
-Moment
-Sequential_music_iterator::pending_moment() const
+Sequential_music_iterator::get_music_list ()const
{
- return iter_p_->pending_moment() + here_mom_;
-}
-
-
-bool
-Sequential_music_iterator::ok() const
-{
- return iter_p_;
-}
-
-Music_iterator*
-Sequential_music_iterator::try_music_in_children (Music *m) const
-{
- return iter_p_ ? iter_p_->try_music (m) : 0;
+ return get_music ()->get_property ("elements");
}