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/*
* Copyright (c) 2012, Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 LayoutPoint_h
#define LayoutPoint_h
#include "FloatPoint.h"
#include "LayoutSize.h"
namespace WebCore {
class LayoutPoint {
public:
LayoutPoint() : m_x(0), m_y(0) { }
LayoutPoint(LayoutUnit x, LayoutUnit y) : m_x(x), m_y(y) { }
LayoutPoint(const IntPoint& point) : m_x(point.x()), m_y(point.y()) { }
explicit LayoutPoint(const FloatPoint& size) : m_x(size.x()), m_y(size.y()) { }
explicit LayoutPoint(const LayoutSize& size) : m_x(size.width()), m_y(size.height()) { }
static LayoutPoint zero() { return LayoutPoint(); }
LayoutUnit x() const { return m_x; }
LayoutUnit y() const { return m_y; }
void setX(LayoutUnit x) { m_x = x; }
void setY(LayoutUnit y) { m_y = y; }
void move(const LayoutSize& s) { move(s.width(), s.height()); }
void moveBy(const LayoutPoint& offset) { move(offset.x(), offset.y()); }
void move(LayoutUnit dx, LayoutUnit dy) { m_x += dx; m_y += dy; }
void scale(float sx, float sy)
{
m_x *= sx;
m_y *= sy;
}
LayoutPoint constrainedBetween(const LayoutPoint& min, const LayoutPoint& max) const;
LayoutPoint expandedTo(const LayoutPoint& other) const
{
return { std::max(m_x, other.m_x), std::max(m_y, other.m_y) };
}
LayoutPoint shrunkTo(const LayoutPoint& other) const
{
return { std::min(m_x, other.m_x), std::min(m_y, other.m_y) };
}
void clampNegativeToZero()
{
*this = expandedTo(zero());
}
LayoutPoint transposedPoint() const
{
return { m_y, m_x };
}
LayoutPoint fraction() const
{
return { m_x.fraction(), m_y.fraction() };
}
operator FloatPoint() const { return { m_x, m_y }; }
private:
LayoutUnit m_x, m_y;
};
inline LayoutPoint& operator+=(LayoutPoint& a, const LayoutSize& b)
{
a.move(b.width(), b.height());
return a;
}
inline LayoutPoint& operator-=(LayoutPoint& a, const LayoutSize& b)
{
a.move(-b.width(), -b.height());
return a;
}
inline LayoutPoint operator+(const LayoutPoint& a, const LayoutSize& b)
{
return LayoutPoint(a.x() + b.width(), a.y() + b.height());
}
inline LayoutPoint operator+(const LayoutPoint& a, const LayoutPoint& b)
{
return LayoutPoint(a.x() + b.x(), a.y() + b.y());
}
inline LayoutSize operator-(const LayoutPoint& a, const LayoutPoint& b)
{
return LayoutSize(a.x() - b.x(), a.y() - b.y());
}
inline LayoutPoint operator-(const LayoutPoint& a, const LayoutSize& b)
{
return LayoutPoint(a.x() - b.width(), a.y() - b.height());
}
inline LayoutPoint operator-(const LayoutPoint& point)
{
return LayoutPoint(-point.x(), -point.y());
}
inline bool operator==(const LayoutPoint& a, const LayoutPoint& b)
{
return a.x() == b.x() && a.y() == b.y();
}
inline bool operator!=(const LayoutPoint& a, const LayoutPoint& b)
{
return a.x() != b.x() || a.y() != b.y();
}
inline LayoutPoint toLayoutPoint(const LayoutSize& size)
{
return LayoutPoint(size.width(), size.height());
}
inline LayoutSize toLayoutSize(const LayoutPoint& point)
{
return LayoutSize(point.x(), point.y());
}
inline IntPoint flooredIntPoint(const LayoutPoint& point)
{
return IntPoint(point.x().floor(), point.y().floor());
}
inline IntPoint roundedIntPoint(const LayoutPoint& point)
{
return IntPoint(point.x().round(), point.y().round());
}
inline IntPoint roundedIntPoint(const LayoutSize& size)
{
return roundedIntPoint(toLayoutPoint(size));
}
inline IntPoint ceiledIntPoint(const LayoutPoint& point)
{
return IntPoint(point.x().ceil(), point.y().ceil());
}
inline LayoutPoint flooredLayoutPoint(const FloatPoint& p)
{
return LayoutPoint(LayoutUnit::fromFloatFloor(p.x()), LayoutUnit::fromFloatFloor(p.y()));
}
inline LayoutPoint ceiledLayoutPoint(const FloatPoint& p)
{
return LayoutPoint(LayoutUnit::fromFloatCeil(p.x()), LayoutUnit::fromFloatCeil(p.y()));
}
inline IntSize snappedIntSize(const LayoutSize& size, const LayoutPoint& location)
{
auto snap = [] (LayoutUnit a, LayoutUnit b) {
LayoutUnit fraction = b.fraction();
return roundToInt(fraction + a) - roundToInt(fraction);
};
return IntSize(snap(size.width(), location.x()), snap(size.height(), location.y()));
}
inline FloatPoint roundPointToDevicePixels(const LayoutPoint& point, float pixelSnappingFactor, bool directionalRoundingToRight = true, bool directionalRoundingToBottom = true)
{
return FloatPoint(roundToDevicePixel(point.x(), pixelSnappingFactor, !directionalRoundingToRight), roundToDevicePixel(point.y(), pixelSnappingFactor, !directionalRoundingToBottom));
}
inline FloatPoint floorPointToDevicePixels(const LayoutPoint& point, float pixelSnappingFactor)
{
return FloatPoint(floorToDevicePixel(point.x(), pixelSnappingFactor), floorToDevicePixel(point.y(), pixelSnappingFactor));
}
inline FloatPoint ceilPointToDevicePixels(const LayoutPoint& point, float pixelSnappingFactor)
{
return FloatPoint(ceilToDevicePixel(point.x(), pixelSnappingFactor), ceilToDevicePixel(point.y(), pixelSnappingFactor));
}
inline FloatSize snapSizeToDevicePixel(const LayoutSize& size, const LayoutPoint& location, float pixelSnappingFactor)
{
auto snap = [&] (LayoutUnit a, LayoutUnit b) {
LayoutUnit fraction = b.fraction();
return roundToDevicePixel(fraction + a, pixelSnappingFactor) - roundToDevicePixel(fraction, pixelSnappingFactor);
};
return FloatSize(snap(size.width(), location.x()), snap(size.height(), location.y()));
}
TextStream& operator<<(TextStream&, const LayoutPoint&);
} // namespace WebCore
#endif // LayoutPoint_h
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