/*
 * Copyright (C) 2007-2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2007-2017 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.
 */

#pragma once

#include <vector>

#include "pbd/signals.h"
#include "pbd/xml++.h"

class XMLProcessorSelection {
  public:
	XMLProcessorSelection() : node (0) {}
	~XMLProcessorSelection() { if (node) { delete node; } }

	void set (XMLNode* n) {
		if (node) {
			delete node;
		}
		node = n;
	}

	void add (XMLNode* newchild) {
		if (!node) {
			node = new XMLNode ("add");
		}
		node->add_child_nocopy (*newchild);
	}

	void clear () {
		if (node) {
			delete node;
			node = 0;
		}
	}

	bool empty () const { return node == 0 || node->children().empty(); }

	const XMLNode& get_node() const { return *node; }

  private:
	XMLNode* node;
};

class ProcessorSelection : public PBD::ScopedConnectionList, public sigc::trackable
{
  public:
	ProcessorSelection () {}

	XMLProcessorSelection processors;
	sigc::signal<void> ProcessorsChanged;


	void clear ();
	bool empty();

	void set (XMLNode* node);
	void add (XMLNode* node);

	void clear_processors ();

	private:
	ProcessorSelection& operator= (const ProcessorSelection& other);
	ProcessorSelection (ProcessorSelection const&);
};

bool operator==(const ProcessorSelection& a, const ProcessorSelection& b);