WebCore/platform/graphics/IntPoint.h

/*
 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef IntPoint_h
#define IntPoint_h

#include "IntSize.h"
#include <wtf/Platform.h>

#if PLATFORM(CG)
typedef struct CGPoint CGPoint;
#endif

#if PLATFORM(MAC)
#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
typedef struct CGPoint NSPoint;
#else
typedef struct _NSPoint NSPoint;
#endif
#endif

#if PLATFORM(WIN)
typedef struct tagPOINT POINT;
typedef struct tagPOINTS POINTS;
#elif PLATFORM(QT)
class QPoint;
#endif
#if PLATFORM(SYMBIAN)
class TPoint;
#endif

namespace WebCore {

class IntPoint {
public:
    IntPoint() : m_x(0), m_y(0) { }
    IntPoint(int x, int y) : m_x(x), m_y(y) { }

    int x() const { return m_x; }
    int y() const { return m_y; }

    void setX(int x) { m_x = x; }
    void setY(int y) { m_y = y; }

    void move(int dx, int dy) { m_x += dx; m_y += dy; }
    
#if PLATFORM(CG)
    explicit IntPoint(const CGPoint&); // don't do this implicitly since it's lossy
    operator CGPoint() const;
#endif

#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
    explicit IntPoint(const NSPoint&); // don't do this implicitly since it's lossy
    operator NSPoint() const;
#endif

#if PLATFORM(WIN)
    IntPoint(const POINT&);
    operator POINT() const;
    IntPoint(const POINTS&);
    operator POINTS() const;
#elif PLATFORM(QT)
    IntPoint(const QPoint&);
    operator QPoint() const;
#endif
#if PLATFORM(SYMBIAN)
    IntPoint(const TPoint&);
    operator TPoint() const;
#endif

private:
    int m_x, m_y;
};

inline IntPoint& operator+=(IntPoint& a, const IntSize& b)
{
    a.move(b.width(), b.height());
    return a;
}

inline IntPoint& operator-=(IntPoint& a, const IntSize& b)
{
    a.move(-b.width(), -b.height());
    return a;
}

inline IntPoint operator+(const IntPoint& a, const IntSize& b)
{
    return IntPoint(a.x() + b.width(), a.y() + b.height());
}

inline IntSize operator-(const IntPoint& a, const IntPoint& b)
{
    return IntSize(a.x() - b.x(), a.y() - b.y());
}

inline IntPoint operator-(const IntPoint& a, const IntSize& b)
{
    return IntPoint(a.x() - b.width(), a.y() - b.height());
}

inline bool operator==(const IntPoint& a, const IntPoint& b)
{
    return a.x() == b.x() && a.y() == b.y();
}

inline bool operator!=(const IntPoint& a, const IntPoint& b)
{
    return a.x() != b.x() || a.y() != b.y();
}

} // namespace WebCore

#endif // IntPoint_h