-/*
- move to context of child iterator if it is deeper down in the
- hierarchy.
- */
-void
-Sequential_iterator::descend_to_child ()
-{
-}
-
-
-/*
- Retrieve all music (starting at HERE), until a music with length L >
- 0 is found. From the precondition, we know that UNTIL is later than
- the earliest event. Hence we know
-
- L >= (UNTIL - HERE)
-
- so something that comes after this thing with L > 0 happens after
-
- HERE + L >= HERE + (UNTIL - HERE) = UNTIL
-
- Hence all events after the one with L>0 are uninteresting, so we
- ignore them.
-
-*/
-
-SCM
-Sequential_iterator::get_pending_events (Moment until)const
-{
- SCM s = SCM_EOL;
- if (until < pending_moment ())
- return s;
-
- Sequential_iterator * me =
- dynamic_cast<Sequential_iterator*> (clone ());
- while (me->ok ())
- {
- SCM nm = me->iter_->get_pending_events (until - me->here_mom_);
- s = gh_append2 (nm, s);
-
- Moment m = 0;
- for (SCM i = nm; gh_pair_p (i); i = ly_cdr (i))
- {
- Music *mus=unsmob_music (ly_car (i));
- m = m >? (mus->get_length () - mus->start_mom ());
- }
- if (m > Moment (0))
- break ;
- else
- me->next_element (false);
- }
-
- scm_gc_unprotect_object (me->self_scm());
- return s;
-}
-
-
-/*
- Skip events till UNTIL. We don't do any other side effects such as
- descending to child iterator contexts, because they might depend on
- \context specs and \translator changes being executed
- */
-void
-Sequential_iterator::skip (Moment until)
-{
- while (ok ())
- {
- if (grace_fixups_ &&
- grace_fixups_->start_ == here_mom_
- && (grace_fixups_->start_ + grace_fixups_->length_
- + Moment (Rational (0), grace_fixups_->grace_start_) == until))
- {
- /*
- do the stuff/note/rest preceding a grace.
- */
- iter_->skip (iter_->music_get_length ());
- }
- else if (iter_->music_get_length () >= until - here_mom_)
- iter_->skip (until - here_mom_ + iter_->music_start_mom ());
-
- if (iter_->ok ())
- return ;
-
- next_element (false);
- }
-}
-