point.h

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/*
 * Copyright © 2012, 2016 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 2 or 3,
 * as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by: Alexandros Frantzis <alexandros.frantzis@canonical.com>
 */
 
#ifndef MIR_GEOMETRY_POINT_H_
#define MIR_GEOMETRY_POINT_H_
 
#include "dimensions.h"
#include <iosfwd>
 
namespace mir
{
namespace geometry
{
 
struct Point
{
    constexpr Point() = default;
    constexpr Point(Point const&) = default;
    Point& operator=(Point const&) = default;
 
    template<typename XType, typename YType>
    constexpr Point(XType&& x, YType&& y) : x(x), y(y) {}
 
    X x;
    Y y;
};
 
inline constexpr bool operator == (Point const& lhs, Point const& rhs)
{
    return lhs.x == rhs.x && lhs.y == rhs.y;
}
 
inline constexpr bool operator != (Point const& lhs, Point const& rhs)
{
    return lhs.x != rhs.x || lhs.y != rhs.y;
}
 
inline constexpr Point operator+(Point lhs, DeltaX rhs) { return{lhs.x + rhs, lhs.y}; }
inline constexpr Point operator+(Point lhs, DeltaY rhs) { return{lhs.x, lhs.y + rhs}; }
 
inline constexpr Point operator-(Point lhs, DeltaX rhs) { return{lhs.x - rhs, lhs.y}; }
inline constexpr Point operator-(Point lhs, DeltaY rhs) { return{lhs.x, lhs.y - rhs}; }
 
inline Point& operator+=(Point& lhs, DeltaX rhs) { lhs.x += rhs; return lhs; }
inline Point& operator+=(Point& lhs, DeltaY rhs) { lhs.y += rhs; return lhs; }
 
inline Point& operator-=(Point& lhs, DeltaX rhs) { lhs.x -= rhs; return lhs; }
inline Point& operator-=(Point& lhs, DeltaY rhs) { lhs.y -= rhs; return lhs; }
 
std::ostream& operator<<(std::ostream& out, Point const& value);
}
}
 
#endif /* MIR_GEOMETRY_POINT_H_ */