-/*
- 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--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+ Copyright (C) 1999--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
-#include "music.hh"
-#include "context.hh"
-#include "event.hh"
-#include "music-wrapper-iterator.hh"
-#include "direction.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.
-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);
-};
+ 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 "change-iterator.hh"
+#include "change-sequence-iterator.hh"
-void
-Auto_change_iterator::change_to (Music_iterator *it, SCM to_type_sym,
- String to_id)
+class Auto_change_iterator : public Change_sequence_iterator
{
- 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->daddy_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 (; gh_pair_p (split_list_); split_list_ = gh_cdr (split_list_))
- {
- splitm = unsmob_moment (gh_caar (split_list_));
- if (*splitm > now)
- break ;
-
- SCM tag = gh_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);
- }
- }
-}
+public:
+ DECLARE_SCHEME_CALLBACK (constructor, ());
+ Auto_change_iterator () {}
-Auto_change_iterator::Auto_change_iterator ()
-{
- where_dir_ = CENTER;
- split_list_ = SCM_EOL;
-}
+private:
+ virtual void change_to (const string &id);
+};
void
-Auto_change_iterator::construct_children ()
+Auto_change_iterator::change_to (const string &id)
{
- Music_wrapper_iterator::construct_children ();
- split_list_ = get_music ()->get_property ("split-list");
+ // 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"), id);
}
IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator);