/*
    Copyright (C) 2014-2023 Carl Hetherington <cth@carlh.net>

    This file is part of DCP-o-matic.

    DCP-o-matic 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.

    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.

*/


#ifndef DCPOMATIC_FONT_H
#define DCPOMATIC_FONT_H


#include <dcp/array_data.h>
#include <dcp/warnings.h>
#include <libcxml/cxml.h>
#include <boost/optional.hpp>
LIBDCP_DISABLE_WARNINGS
#include <boost/signals2.hpp>
LIBDCP_ENABLE_WARNINGS
#include <boost/filesystem.hpp>
#include <string>


namespace dcpomatic {


class Font
{
public:
	explicit Font(std::string id)
		: _id(id) {}

	explicit Font(cxml::NodePtr node);

	Font(std::string id, boost::filesystem::path file)
		: _id(id)
	{
		_content.file = file;
	}

	Font(std::string id, dcp::ArrayData data)
		: _id(id)
	{
		_content.data = data;
	}

	Font(Font const& other);
	Font& operator=(Font const& other);

	void as_xml(xmlpp::Element* element);

	std::string id() const {
		return _id;
	}

	void set_id(std::string id) {
		_id = id;
	}

	boost::optional<boost::filesystem::path> file() const {
		return _content.file;
	}

	void set_file(boost::filesystem::path file) {
		_content.file = file;
		Changed();
	}

	/** @return the data set passed to the dcp::ArrayData constructor,
	 *  otherwise the contents of _file, otherwise boost::none.
	 */
	boost::optional<dcp::ArrayData> data() const;

	/** The actual TTF/OTF font data, as either a filename or the raw data itself */
	struct Content
	{
		boost::optional<dcp::ArrayData> data;
		boost::optional<boost::filesystem::path> file;
	};

	Content content() const {
		return _content;
	}

	boost::signals2::signal<void()> Changed;

private:
	/** Font ID, used to describe it in the subtitle content; could be either a
	 *  font family name or an ID from some DCP font XML.
	 */
	std::string _id;
	Content _content;
};


bool operator!=(Font const & a, Font const & b);
bool operator==(Font const & a, Font const & b);


}

#endif