/*
    Copyright (C) 2009 Paul Davis

    This program 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 2 of the License, or
    (at your option) any later version.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "pbd/error.h"

#include "ardour/session.h"
#include "ardour/session_handle.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;

SessionHandlePtr::SessionHandlePtr (Session* s)
	: _session (s) 
{
	if (_session) {
		_session_connections.add_connection (_session->GoingAway.connect (boost::bind (&SessionHandlePtr::session_going_away, this)));
	}
}	

void
SessionHandlePtr::set_session (Session* s)
{
	_session_connections.drop_connections ();

	if (_session) {
		_session = 0;
	}

	if (s) {
		_session = s;
		_session_connections.add_connection (_session->GoingAway.connect (boost::bind (&SessionHandlePtr::session_going_away, this)));
	}
}

void
SessionHandlePtr::session_going_away ()
{
	set_session (0);
}

/*-------------------------*/


SessionHandleRef::SessionHandleRef (Session& s)
	: _session (s) 
{
	scoped_connect (_session.GoingAway, boost::bind (&SessionHandleRef::session_going_away, this));
}	

void
SessionHandleRef::session_going_away ()
{
	error << string_compose (_("programming error: %1"), "SessionHandleRef exists across sesssion deletion!") << endmsg;
}