-
-
-void
-Auto_change_iterator::change_to (Music_iterator *it, SCM to_type_sym,
- String to_id)
-{
- Context * current = it->get_outlet ();
- Context * last = 0;
-
- /*
- Cut & Paste from Change_iterator (ugh).
-
- TODO: abstract this function
- */
-
- /* find the type of translator that we're changing.
-
- If \translator Staff = bass, then look for Staff = *
- */
- while (current && !current->is_alias (to_type_sym))
- {
- last = current;
- current = current->get_parent_context ();
- }
-
- if (current && current->id_string_ == to_id)
- {
- String msg;
- msg += _ ("Can't switch translators, I'm there already");
- }
-
- if (current)
- if (last)
- {
- Context * dest =
- it->get_outlet ()->find_create_context (to_type_sym, to_id, SCM_EOL);
- current->remove_context (last);
- dest->add_context (last);
- }
- else
- {
- /*
- We could change the current translator's id, but that would make
- errors hard to catch
-
- */
- }
- else
- ;
-
-}
-
-void
-Auto_change_iterator::process (Moment m)
-{
- Music_wrapper_iterator::process (m);
-
- Moment now = get_outlet ()->now_mom ();
- Moment *splitm = 0;
-
- for (; ly_c_pair_p (split_list_); split_list_ = ly_cdr (split_list_))
- {
- splitm = unsmob_moment (ly_caar (split_list_));
- if ((*splitm + start_moment_) > now)
- break ;
-
- SCM tag = ly_cdar (split_list_);
- Direction d = to_dir (tag);
-
- if (d && d != where_dir_)
- {
- where_dir_ = d;
- String to_id = (d >= 0) ? "up" : "down";
- change_to (child_iter_,
- ly_symbol2scm ("Staff"),
- to_id);
- }
- }
-}
-
-Auto_change_iterator::Auto_change_iterator ()
-{
- where_dir_ = CENTER;
- split_list_ = SCM_EOL;
-}
-