/*
  This file is part of LilyPond, the GNU music typesetter.

  Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>

  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 "music-wrapper-iterator.hh"
#include "music-wrapper.hh"
#include "music.hh"

Music_wrapper_iterator::Music_wrapper_iterator ()
{
  child_iter_ = 0;
}

void
Music_wrapper_iterator::do_quit ()
{
  if (child_iter_)
    child_iter_->quit ();
}

void
Music_wrapper_iterator::derived_mark () const
{
  if (child_iter_)
    scm_gc_mark (child_iter_->self_scm ());
}

void
Music_wrapper_iterator::derived_substitute (Context *f, Context *t)
{
  if (child_iter_)
    child_iter_->substitute_outlet (f, t);
}

void
Music_wrapper_iterator::construct_children ()
{
  Music *my_music = get_music ();
  Music *child = unsmob<Music> (my_music->get_property ("element"));
  child_iter_ = (child)
                ? unsmob<Music_iterator> (get_iterator (child))
                : 0;
}

bool
Music_wrapper_iterator::ok () const
{
  return child_iter_ && child_iter_->ok ();
}

void
Music_wrapper_iterator::process (Moment m)
{
  if (child_iter_)
    child_iter_->process (m);
}

Moment
Music_wrapper_iterator::pending_moment () const
{
  if (child_iter_)
    return child_iter_->pending_moment ();
  else
    return Music_iterator::pending_moment ();
}

Context *
Music_wrapper_iterator::get_outlet () const
{
  if (child_iter_)
    return child_iter_->get_outlet ();
  return Music_iterator::get_outlet ();
}

void
Music_wrapper_iterator::set_context (Context *trans)
{
  if (child_iter_)
    child_iter_->set_context (trans);
  Music_iterator::set_context (trans);
}

IMPLEMENT_CTOR_CALLBACK (Music_wrapper_iterator);

bool
Music_wrapper_iterator::run_always () const
{
  return (child_iter_ && child_iter_->run_always ());
}
