/*
    Copyright (C) 2016 Paul Davis
    Author: David Robillard

    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.
*/

#ifndef __ardour_midi_cursor_h__
#define __ardour_midi_cursor_h__

#include <set>

#include <boost/utility.hpp>

#include "ardour/types.h"
#include "evoral/Beats.hpp"
#include "evoral/Sequence.hpp"
#include "pbd/signals.h"

namespace ARDOUR {

struct MidiCursor : public boost::noncopyable {
	MidiCursor() : last_read_end(0) {}

	void connect(PBD::Signal1<void, bool>& invalidated) {
		connections.drop_connections();
		invalidated.connect_same_thread(
			connections, boost::bind(&MidiCursor::invalidate, this, _1));
	}

	void invalidate(bool preserve_notes) {
		iter.invalidate(preserve_notes ? &active_notes : NULL);
		last_read_end = 0;
	}

	Evoral::Sequence<Evoral::Beats>::const_iterator        iter;
	std::set<Evoral::Sequence<Evoral::Beats>::WeakNotePtr> active_notes;
	framepos_t                                             last_read_end;
	PBD::ScopedConnectionList                              connections;
};

}

#endif /* __ardour_midi_cursor_h__ */