/*

 * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.

 * Copyright (C) 2005 Nokia.  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 FloatSize_h

#define FloatSize_h

#include <wtf/Platform.h>

#if PLATFORM(CG)

typedef struct CGSize CGSize;

#endif

#if PLATFORM(MAC)

#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES

typedef struct CGSize NSSize;

#else

typedef struct _NSSize NSSize;

#endif

#endif

namespace WebCore {

class IntSize;

class FloatSize {

public:

    FloatSize() : m_width(0), m_height(0) { }

    FloatSize(float width, float height) : m_width(width), m_height(height) { }

    FloatSize(const IntSize&);

    static FloatSize narrowPrecision(double width, double height);

    float width() const { return m_width; }

    float height() const { return m_height; }

    void setWidth(float width) { m_width = width; }

    void setHeight(float height) { m_height = height; }

    bool isEmpty() const { return m_width <= 0 || m_height <= 0; }

    FloatSize expandedTo(const FloatSize& other) const

    {

        return FloatSize(m_width > other.m_width ? m_width : other.m_width,

            m_height > other.m_height ? m_height : other.m_height);

    }

#if PLATFORM(CG)

    explicit FloatSize(const CGSize&); // don't do this implicitly since it's lossy

    operator CGSize() const;

#endif

#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)

    explicit FloatSize(const NSSize &); // don't do this implicitly since it's lossy

    operator NSSize() const;

#endif

private:

    float m_width, m_height;

};

inline FloatSize& operator+=(FloatSize& a, const FloatSize& b)

{

    a.setWidth(a.width() + b.width());

    a.setHeight(a.height() + b.height());

    return a;

}

inline FloatSize& operator-=(FloatSize& a, const FloatSize& b)

{

    a.setWidth(a.width() - b.width());

    a.setHeight(a.height() - b.height());

    return a;

}

inline FloatSize operator+(const FloatSize& a, const FloatSize& b)

{

    return FloatSize(a.width() + b.width(), a.height() + b.height());

}

inline FloatSize operator-(const FloatSize& a, const FloatSize& b)

{

    return FloatSize(a.width() - b.width(), a.height() - b.height());

}

inline FloatSize operator-(const FloatSize& size)

{

    return FloatSize(-size.width(), -size.height());

}

inline bool operator==(const FloatSize& a, const FloatSize& b)

{

    return a.width() == b.width() && a.height() == b.height();

}

inline bool operator!=(const FloatSize& a, const FloatSize& b)

{

    return a.width() != b.width() || a.height() != b.height();

}

} // namespace WebCore

#endif // FloatSize_h