/*
 * Copyright (C) 2014-2015 David Robillard <d@drobilla.net>
 * Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "ardour/legatize.h"
#include "ardour/midi_model.h"

namespace ARDOUR {

Legatize::Legatize(bool shrink_only)
	: _shrink_only(shrink_only)
{}

Legatize::~Legatize ()
{}

PBD::Command*
Legatize::operator()(std::shared_ptr<ARDOUR::MidiModel> model,
                     Temporal::Beats                      position,
                     std::vector<Legatize::Notes>&        seqs)
{
	MidiModel::NoteDiffCommand* cmd = new MidiModel::NoteDiffCommand(model, name ());

	for (std::vector<Legatize::Notes>::iterator s = seqs.begin(); s != seqs.end(); ++s) {
		for (Legatize::Notes::iterator i = (*s).begin(); i != (*s).end();) {
			Legatize::Notes::iterator next = i;
			if (++next == (*s).end()) {
				break;
			}

			const Temporal::Beats new_end = (*next)->time() - Temporal::Beats::one_tick();
			if ((*i)->end_time() > new_end ||
			    (!_shrink_only && (*i)->end_time() < new_end)) {
				const Temporal::Beats new_length(new_end - (*i)->time());
				cmd->change((*i), MidiModel::NoteDiffCommand::Length, new_length);
			}

			i = next;
		}
	}

	return cmd;
}

}  // namespace ARDOUR
