/*

 * Copyright (C) 2003, 2006, 2007 Apple 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.

 */

#include "config.h"

#include "FloatRect.h"

#include "FloatConversion.h"

#include "IntRect.h"

#include <algorithm>

using std::max;

using std::min;

namespace WebCore {

FloatRect::FloatRect(const IntRect& r) : m_location(r.location()), m_size(r.size())

{

}

FloatRect FloatRect::narrowPrecision(double x, double y, double width, double height)

{

    return FloatRect(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y), narrowPrecisionToFloat(width), narrowPrecisionToFloat(height));

}

bool FloatRect::intersects(const FloatRect& other) const

{

    // Checking emptiness handles negative widths as well as zero.

    return !isEmpty() && !other.isEmpty()

        && x() < other.right() && other.x() < right()

        && y() < other.bottom() && other.y() < bottom();

}

bool FloatRect::contains(const FloatRect& other) const

{

    return x() <= other.x() && right() >= other.right()

        && y() <= other.y() && bottom() >= other.bottom();

}

void FloatRect::intersect(const FloatRect& other)

{

    float l = max(x(), other.x());

    float t = max(y(), other.y());

    float r = min(right(), other.right());

    float b = min(bottom(), other.bottom());

    // Return a clean empty rectangle for non-intersecting cases.

    if (l >= r || t >= b) {

        l = 0;

        t = 0;

        r = 0;

        b = 0;

    }

    m_location.setX(l);

    m_location.setY(t);

    m_size.setWidth(r - l);

    m_size.setHeight(b - t);

}

void FloatRect::unite(const FloatRect& other)

{

    // Handle empty special cases first.

    if (other.isEmpty())

        return;

    if (isEmpty()) {

        *this = other;

        return;

    }

    float l = min(x(), other.x());

    float t = min(y(), other.y());

    float r = max(right(), other.right());

    float b = max(bottom(), other.bottom());

    m_location.setX(l);

    m_location.setY(t);

    m_size.setWidth(r - l);

    m_size.setHeight(b - t);

}

void FloatRect::scale(float s)

{

    m_location.setX(x() * s);

    m_location.setY(y() * s);

    m_size.setWidth(width() * s);

    m_size.setHeight(height() * s);

}

IntRect enclosingIntRect(const FloatRect& rect)

{

    int l = static_cast<int>(rect.x());

    int t = static_cast<int>(rect.y());

    // FIXME: These two need to be a "ceiling" operation, not rounding.

    // We changed them to do "+ 0.5f" to compile on Win32 where there's

    // no ceilf, but they should be changed back to "ceiling" at some point

    // and we should provide an implementation of ceilf for Win32.

    int r = static_cast<int>(rect.right() + 0.5f);

    int b = static_cast<int>(rect.bottom() + 0.5f);

    return IntRect(l, t, r - l, b - t);

}

}