-Auto_change_iterator::process (Moment m)
-{
- Music_wrapper_iterator::process (m);
-
- Moment now = get_outlet ()->now_mom ();
- Moment *splitm = 0;
- if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
- start_moment_ = now;
-
- for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
- {
- splitm = unsmob<Moment> (scm_caar (split_list_));
- if ((*splitm + start_moment_) > now)
- break;
-
- SCM tag = scm_cdar (split_list_);
- Direction d = to_dir (tag);
-
- if (d && d != where_dir_)
- {
- where_dir_ = d;
- string to_id = (d >= 0) ? "up" : "down";
- // N.B. change_to() returns an error message. Silence is the legacy
- // behavior here, but maybe that should be changed.
- Change_iterator::change_to (*child_iter_,
- ly_symbol2scm ("Staff"),
- to_id);
- }
- }
-}
-
-Auto_change_iterator::Auto_change_iterator ()
-{
- where_dir_ = CENTER;
- split_list_ = SCM_EOL;
-}
-
-void
-Auto_change_iterator::construct_children ()
-{
- split_list_ = get_music ()->get_property ("split-list");
- start_moment_ = get_outlet ()->now_mom ();
-
- SCM props = get_outlet ()->get_property ("trebleStaffProperties");
- Context *up = get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
- "up", props);
-
- props = get_outlet ()->get_property ("bassStaffProperties");
- Context *down = get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
- "down", props);
-
- up_.set_context (up);
- down_.set_context (down);
-
- Context *voice = up->find_create_context (ly_symbol2scm ("Voice"),
- "", SCM_EOL);
- set_context (voice);
- Music_wrapper_iterator::construct_children ();
-}
-
-void
-Auto_change_iterator::do_quit ()