-/*
- auto-change-iterator.cc -- implement Auto_change_iterator
+/*
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+ Copyright (C) 1999--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
-#include "music.hh"
-#include "auto-change-iterator.hh"
-#include "translator-group.hh"
-#include "event.hh"
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "context.hh"
+#include "direction.hh"
+#include "international.hh"
+#include "music.hh"
+#include "music-wrapper-iterator.hh"
+
+class Auto_change_iterator : public Music_wrapper_iterator
+{
+public:
+ DECLARE_SCHEME_CALLBACK (constructor, ());
+
+ Auto_change_iterator ();
+
+protected:
+ virtual void do_quit ();
+ virtual void construct_children ();
+ virtual void process (Moment);
+ vector<Pitch> pending_pitch (Moment) const;
+private:
+ SCM split_list_;
+ Direction where_dir_;
+ void change_to (Music_iterator *, SCM, const string&);
+ Moment start_moment_;
+
+ Context_handle up_;
+ Context_handle down_;
+};
void
Auto_change_iterator::change_to (Music_iterator *it, SCM to_type_sym,
- String to_id)
+ const 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).
- TODO: abstract this function
- */
-
+ 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_b (to_type_sym))
+
+ If \translator Staff = bass, then look for Staff = *
+ */
+ 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");
+ string msg;
+ msg += _f ("cannot change, already in translator: %s", to_id);
}
-
- 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);
- }
- 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)
+ if (current)
{
- 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 ();
+ if (last)
+ {
+ Context *dest
+ = it->get_outlet ()->find_create_context (to_type_sym, to_id, SCM_EOL);
+
+ send_stream_event (last, "ChangeParent", get_music ()->origin (),
+ ly_symbol2scm ("context"), dest->self_scm ());
+ }
+ else
+ {
+ /*
+ We could change the current translator's id, but that would make
+ errors hard to catch
+
+ */
+ ;
+ }
}
-
- 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;
+ 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_))
{
- 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";
- change_to (child_iter_, get_music ()->get_mus_property ("what"), to_id);
- }
+ splitm = Moment::unsmob (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";
+ 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 ()
+{
+ up_.set_context (0);
+ down_.set_context (0);
}
IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator);
projects / lilypond.git / blobdiff