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/*
* Copyright (c) 2012, Google Inc. All rights reserved.
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* modification, are permitted provided that the following conditions are
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*
* * Redistributions of source code must retain the above copyright
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* in the documentation and/or other materials provided with the
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LayoutRect.h"
#include <algorithm>
#include <wtf/text/TextStream.h>
namespace WebCore {
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;
}
bool LayoutRect::edgeInclusiveIntersect(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()));
bool intersects = true;
// Return a clean empty rectangle for non-intersecting cases.
if (newLocation.x() > newMaxPoint.x() || newLocation.y() > newMaxPoint.y()) {
newLocation = { };
newMaxPoint = { };
intersects = false;
}
m_location = newLocation;
m_size = newMaxPoint - newLocation;
return intersects;
}
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;
}
bool LayoutRect::checkedUnite(const LayoutRect& other)
{
if (other.isEmpty())
return true;
if (isEmpty()) {
*this = other;
return true;
}
if (!isMaxXMaxYRepresentable() || !other.isMaxXMaxYRepresentable())
return false;
FloatPoint topLeft = FloatPoint(std::min<float>(x(), other.x()), std::min<float>(y(), other.y()));
FloatPoint bottomRight = FloatPoint(std::max<float>(maxX(), other.maxX()), std::max<float>(maxY(), other.maxY()));
FloatSize size = bottomRight - topLeft;
if (size.width() >= LayoutUnit::nearlyMax() || size.height() >= LayoutUnit::nearlyMax())
return false;
m_location = LayoutPoint(topLeft);
m_size = LayoutSize(size);
return true;
}
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 scaleValue)
{
scale(scaleValue, scaleValue);
}
void LayoutRect::scale(float xScale, float yScale)
{
if (isInfinite())
return;
m_location.scale(xScale, yScale);
m_size.scale(xScale, yScale);
}
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)
{
// Empty rects with fractional x, y values turn into non-empty rects when converting to enclosing.
// We need to ensure that empty rects stay empty after the conversion, because the selection code expects them to be empty.
IntPoint location = flooredIntPoint(rect.minXMinYCorner());
IntPoint maxPoint = IntPoint(rect.width() ? rect.maxX().ceil() : location.x(), rect.height() ? rect.maxY().ceil() : location.y());
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);
}
FloatRect encloseRectToDevicePixels(const LayoutRect& rect, float pixelSnappingFactor)
{
FloatPoint location = floorPointToDevicePixels(rect.minXMinYCorner(), pixelSnappingFactor);
FloatPoint maxPoint = ceilPointToDevicePixels(rect.maxXMaxYCorner(), pixelSnappingFactor);
return FloatRect(location, maxPoint - location);
}
TextStream& operator<<(TextStream& ts, const LayoutRect& r)
{
if (ts.hasFormattingFlag(TextStream::Formatting::LayoutUnitsAsIntegers))
return ts << snappedIntRect(r);
return ts << FloatRect(r);
}
} // namespace WebCore