source file of the GNU LilyPond music typesetter
- (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "auto-change-music.hh"
+#include "music.hh"
#include "auto-change-iterator.hh"
#include "translator-group.hh"
#include "musical-request.hh"
Auto_change_iterator::change_to (Music_iterator *it, String to_type,
String to_id)
{
- Translator_group * current = it->report_to_l ();
+ Translator_group * current = it->report_to ();
Translator_group * last = 0;
/*
If \translator Staff = bass, then look for Staff = *
*/
- while (current && current->type_str_ != to_type)
+ while (current && current->type_string_ != to_type)
{
last = current;
- current = current->daddy_trans_l_;
+ current = current->daddy_trans_;
}
- if (current && current->id_str_ == to_id)
+ if (current && current->id_string_ == to_id)
{
String msg;
msg += _ ("Can't switch translators, I'm there already");
if (last)
{
Translator_group * dest =
- it->report_to_l ()->find_create_translator_l (to_type, to_id);
- current->remove_translator_p (last);
- dest->add_translator (last);
+ it->report_to ()->find_create_translator (to_type, to_id);
+ current->remove_translator (last);
+ dest->add_used_group_translator (last);
}
else
{
We could change the current translator's id, but that would make
errors hard to catch
- last->translator_id_str_ = change_l ()->change_to_id_str_;
+ last->translator_id_string_ = get_change ()->change_to_id_string_;
*/
// error (_ ("I'm one myself"));
}
}
-void
-Auto_change_iterator::do_process_and_next (Moment m)
+/*
+ Look ahead to find first pitches to determine staff position.
+ WARNING: this means that
+
+ \autochange Staff \notes { .... \context Staff = otherstaff { .. } .. }
+
+ will confuse the autochanger, since it will not notice that the
+ music for OTHERSTAFF is not his.
+
+ PRECONDITION: this->ok () holds.
+*/
+Array<Pitch>
+Auto_change_iterator::pending_pitch (Moment m) const
{
- Music_wrapper_iterator::do_process_and_next (m);
- Pitch_interrogate_req spanish_inquisition; // nobody expects it
+ Music_iterator * iter = child_iter_ ->clone ();
+ Array<Pitch> ps;
+ while (1)
+ {
+ SCM muses = iter->get_pending_events (m);
+ for (SCM s = muses; gh_pair_p (s); s=ly_cdr (s))
+ if (Note_req* nr = dynamic_cast<Note_req*> (unsmob_music (ly_car (s))))
+ {
+ ps.push (*unsmob_pitch (nr->get_mus_property ("pitch")));
+ }
+
+ if (ps.size ())
+ break;
+
+ iter->skip (m);
+ if (!iter->ok ())
+ break;
+
+ m = iter->pending_moment ();
+ }
+
+ scm_gc_unprotect_object (iter->self_scm());
- Music_iterator *it = try_music (&spanish_inquisition);
+ return ps;
+}
+
+void
+Auto_change_iterator::process (Moment m)
+{
+ /*
+ first we get the pitches, then we do the real work.
+ Music_wrapper_iterator::process () might process (and throw away)
+ pitches we need. */
+ Array<Pitch> ps = pending_pitch (m);
- if (it && spanish_inquisition.pitch_arr_.size ())
+ Music_wrapper_iterator::process (m);
+ if (ps.size ())
{
- Musical_pitch p = spanish_inquisition.pitch_arr_[0];
- Direction s = Direction (sign(p.steps ()));
+ Pitch p = ps[0];
+ Direction s = Direction (sign (p.steps ()));
+ /*
+ Don't change for central C.
+
+ TODO: make this tunable somehow. Sometimes, you'd want to
+ switch for C.C. as well.
+
+ */
if (s && s != where_dir_)
{
where_dir_ = s;
- String to_id = (s > 0) ? "up" : "down";
- Auto_change_music const * auto_mus = dynamic_cast<Auto_change_music const* > (music_l_);
-
- change_to (it, auto_mus->what_str_, to_id);
+ String to_id = (s >= 0) ? "up" : "down";
+ String wh = ly_scm2string (get_music ()->get_mus_property ("what"));
+ change_to (child_iter_, wh, to_id);
}
}
}
-Auto_change_iterator::Auto_change_iterator( )
+Auto_change_iterator::Auto_change_iterator ()
{
where_dir_ = CENTER;
}
+
+IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator);