source file of the GNU LilyPond music typesetter
- (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "music.hh"
-#include "auto-change-iterator.hh"
-#include "translator-group.hh"
+#include "context.hh"
#include "event.hh"
+#include "music-wrapper-iterator.hh"
+#include "direction.hh"
+
+class Auto_change_iterator : public Music_wrapper_iterator
+{
+public:
+ DECLARE_SCHEME_CALLBACK (constructor, ());
+
+ Auto_change_iterator ();
+
+protected:
+ virtual void construct_children ();
+ virtual void process (Moment);
+ Array<Pitch> pending_pitch (Moment)const;
+private:
+ SCM split_list_;
+ Direction where_dir_;
+ void change_to (Music_iterator* , SCM, String);
+ Moment start_moment_;
+};
Auto_change_iterator::change_to (Music_iterator *it, SCM to_type_sym,
String to_id)
{
- Translator_group * current = it->report_to ();
- Translator_group * last = 0;
+ Context * current = it->get_outlet ();
+ Context * last = 0;
/*
Cut & Paste from Change_iterator (ugh).
If \translator Staff = bass, then look for Staff = *
*/
- while (current && !current->is_alias_b (to_type_sym))
+ while (current && !current->is_alias (to_type_sym))
{
last = current;
- current = current->daddy_trans_;
+ current = current->get_parent_context ();
}
- if (current && current->id_string_ == to_id)
+ if (current && current->id_string () == to_id)
{
String msg;
msg += _ ("Can't switch translators, I'm there already");
if (current)
if (last)
{
- Translator_group * dest =
- it->report_to ()->find_create_translator (to_type_sym, to_id);
- current->remove_translator (last);
- dest->add_used_group_translator (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
- last->translator_id_string_ = get_change ()->change_to_id_string_;
*/
- // error (_ ("I'm one myself"));
}
else
- ; // error (_ ("none of these in my family"));
+ ;
}
-/*
- 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_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))
- {
- Music * m = unsmob_music (ly_car (s));
- if (m && m->is_mus_type ("note-event"))
- {
- ps.push (*unsmob_pitch (m->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());
-
- 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);
-
Music_wrapper_iterator::process (m);
- if (ps.size ())
+
+ Moment now = get_outlet ()->now_mom ();
+ Moment *splitm = 0;
+
+ for (; ly_c_pair_p (split_list_); split_list_ = ly_cdr (split_list_))
{
- 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.
+ splitm = unsmob_moment (ly_caar (split_list_));
+ if ((*splitm + start_moment_) > now)
+ break ;
- */
- if (s && s != where_dir_)
+ SCM tag = ly_cdar (split_list_);
+ Direction d = to_dir (tag);
+
+ if (d && d != where_dir_)
{
- where_dir_ = s;
- String to_id = (s >= 0) ? "up" : "down";
- change_to (child_iter_, get_music ()->get_mus_property ("what"), to_id);
+ 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;
+}
+
+void
+Auto_change_iterator::construct_children ()
+{
+ Music_wrapper_iterator::construct_children ();
+ split_list_ = get_music ()->get_property ("split-list");
+ start_moment_ = get_outlet ()->now_mom ();
}
IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator);