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/*
Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
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 LIBSUB_VERTICAL_POSITION_H
#define LIBSUB_VERTICAL_POSITION_H
#include "vertical_reference.h"
#include <boost/optional.hpp>
namespace sub {
/** @class VerticalPosition
* @brief Vertical position of the baseline of some text, expressed in one of a number of ways.
*/
class VerticalPosition
{
public:
/** as a proportion of screen height offset from some reference point */
boost::optional<float> proportional;
/** line number offset from some reference point */
boost::optional<int> line;
/** number of lines on the whole screen (i.e. height of the screen in lines) */
boost::optional<int> lines;
/** reference point */
boost::optional<VerticalReference> reference;
bool operator== (VerticalPosition const & other) const;
bool operator< (VerticalPosition const & other) const;
float fraction_from_screen_top () const;
};
}
#endif
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