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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.
*/
#include "config.h"
#include "platform/geometry/LayoutRect.h"
#include "platform/LayoutUnit.h"
#include "platform/geometry/FloatRect.h"
#include <algorithm>
#include <stdio.h>
namespace blink {
LayoutRect::LayoutRect(const FloatRect& r)
: m_location(LayoutPoint(r.location()))
, m_size(LayoutSize(r.size()))
{
}
bool LayoutRect::intersects(const LayoutRect& other) const
{
// Checking emptiness handles negative widths as well as zero.
return !isEmpty() && !other.isEmpty()
&& x() < other.maxX() && other.x() < maxX()
&& y() < other.maxY() && other.y() < maxY();
}
bool LayoutRect::contains(const LayoutRect& other) const
{
return x() <= other.x() && maxX() >= other.maxX()
&& y() <= other.y() && maxY() >= other.maxY();
}
void LayoutRect::intersect(const LayoutRect& other)
{
LayoutPoint newLocation(std::max(x(), other.x()), std::max(y(), other.y()));
LayoutPoint newMaxPoint(std::min(maxX(), other.maxX()), std::min(maxY(), other.maxY()));
// Return a clean empty rectangle for non-intersecting cases.
if (newLocation.x() >= newMaxPoint.x() || newLocation.y() >= newMaxPoint.y()) {
newLocation = LayoutPoint(0, 0);
newMaxPoint = LayoutPoint(0, 0);
}
m_location = newLocation;
m_size = newMaxPoint - newLocation;
}
void LayoutRect::unite(const LayoutRect& other)
{
// Handle empty special cases first.
if (other.isEmpty())
return;
if (isEmpty()) {
*this = other;
return;
}
LayoutPoint newLocation(std::min(x(), other.x()), std::min(y(), other.y()));
LayoutPoint newMaxPoint(std::max(maxX(), other.maxX()), std::max(maxY(), other.maxY()));
m_location = newLocation;
m_size = newMaxPoint - newLocation;
}
void LayoutRect::uniteIfNonZero(const LayoutRect& other)
{
// Handle empty special cases first.
if (!other.width() && !other.height())
return;
if (!width() && !height()) {
*this = other;
return;
}
LayoutPoint newLocation(std::min(x(), other.x()), std::min(y(), other.y()));
LayoutPoint newMaxPoint(std::max(maxX(), other.maxX()), std::max(maxY(), other.maxY()));
m_location = newLocation;
m_size = newMaxPoint - newLocation;
}
void LayoutRect::scale(float s)
{
m_location.scale(s, s);
m_size.scale(s);
}
void LayoutRect::scale(float xAxisScale, float yAxisScale)
{
m_location.scale(xAxisScale, yAxisScale);
m_size.scale(xAxisScale, yAxisScale);
}
#ifndef NDEBUG
void LayoutRect::show(bool showRawValue) const
{
if (showRawValue)
printf("Rect (in raw layout units): [x=%d y=%d maxX=%d maxY=%d]\n", x().rawValue(), y().rawValue(), maxX().rawValue(), maxY().rawValue());
else
printf("Rect (in pixels): [x=%lf y=%lf maxX=%lf maxY=%lf]\n", x().toDouble(), y().toDouble(), maxX().toDouble(), maxY().toDouble());
}
#endif
LayoutRect unionRect(const Vector<LayoutRect>& rects)
{
LayoutRect result;
size_t count = rects.size();
for (size_t i = 0; i < count; ++i)
result.unite(rects[i]);
return result;
}
IntRect enclosingIntRect(const LayoutRect& rect)
{
IntPoint location = flooredIntPoint(rect.minXMinYCorner());
IntPoint maxPoint = ceiledIntPoint(rect.maxXMaxYCorner());
return IntRect(location, maxPoint - location);
}
LayoutRect enclosingLayoutRect(const FloatRect& rect)
{
LayoutPoint location = flooredLayoutPoint(rect.minXMinYCorner());
LayoutPoint maxPoint = ceiledLayoutPoint(rect.maxXMaxYCorner());
return LayoutRect(location, maxPoint - location);
}
} // namespace blink