third_party/WebKit/Source/platform/geometry/LayoutRect.h - chromium/src - Git at Google

 /*
  * 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 LayoutRect_h
 #define LayoutRect_h

 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/geometry/LayoutRectOutsets.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 #include "wtf/Vector.h"
 #include <iosfwd>

 namespace blink {

 class FloatRect;
 class DoubleRect;

 class PLATFORM_EXPORT LayoutRect {
   DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();

  public:
   LayoutRect() {}
   LayoutRect(const LayoutPoint& location, const LayoutSize& size)
       : m_location(location), m_size(size) {}
   LayoutRect(LayoutUnit x, LayoutUnit y, LayoutUnit width, LayoutUnit height)
       : m_location(LayoutPoint(x, y)), m_size(LayoutSize(width, height)) {}
   LayoutRect(int x, int y, int width, int height)
       : m_location(LayoutPoint(x, y)), m_size(LayoutSize(width, height)) {}
   LayoutRect(const FloatPoint& location, const FloatSize& size)
       : m_location(location), m_size(size) {}
   LayoutRect(const DoublePoint& location, const DoubleSize& size)
       : m_location(location), m_size(size) {}
   LayoutRect(const IntPoint& location, const IntSize& size)
       : m_location(location), m_size(size) {}
   explicit LayoutRect(const IntRect& rect)
       : m_location(rect.location()), m_size(rect.size()) {}

   explicit LayoutRect(
       const FloatRect&);  // don't do this implicitly since it's lossy
   explicit LayoutRect(
       const DoubleRect&);  // don't do this implicitly since it's lossy

   LayoutPoint location() const { return m_location; }
   LayoutSize size() const { return m_size; }

   IntPoint pixelSnappedLocation() const { return roundedIntPoint(m_location); }
   IntSize pixelSnappedSize() const {
     return IntSize(snapSizeToPixel(m_size.width(), m_location.x()),
                    snapSizeToPixel(m_size.height(), m_location.y()));
   }

   void setLocation(const LayoutPoint& location) { m_location = location; }
   void setSize(const LayoutSize& size) { m_size = size; }

   ALWAYS_INLINE LayoutUnit x() const { return m_location.x(); }
   ALWAYS_INLINE LayoutUnit y() const { return m_location.y(); }
   ALWAYS_INLINE LayoutUnit maxX() const { return x() + width(); }
   ALWAYS_INLINE LayoutUnit maxY() const { return y() + height(); }
   LayoutUnit width() const { return m_size.width(); }
   LayoutUnit height() const { return m_size.height(); }

   int pixelSnappedWidth() const { return snapSizeToPixel(width(), x()); }
   int pixelSnappedHeight() const { return snapSizeToPixel(height(), y()); }

   void setX(LayoutUnit x) { m_location.setX(x); }
   void setY(LayoutUnit y) { m_location.setY(y); }
   void setWidth(LayoutUnit width) { m_size.setWidth(width); }
   void setHeight(LayoutUnit height) { m_size.setHeight(height); }

   ALWAYS_INLINE bool isEmpty() const { return m_size.isEmpty(); }

   // NOTE: The result is rounded to integer values, and thus may be not the
   // exact center point.
   LayoutPoint center() const {
     return LayoutPoint(x() + width() / 2, y() + height() / 2);
   }

   void move(const LayoutSize& size) { m_location += size; }
   void move(const IntSize& size) {
     m_location.move(LayoutUnit(size.width()), LayoutUnit(size.height()));
   }
   void moveBy(const LayoutPoint& offset) {
     m_location.move(offset.x(), offset.y());
   }
   void moveBy(const IntPoint& offset) {
     m_location.move(LayoutUnit(offset.x()), LayoutUnit(offset.y()));
   }
   void move(LayoutUnit dx, LayoutUnit dy) { m_location.move(dx, dy); }
   void move(int dx, int dy) { m_location.move(LayoutUnit(dx), LayoutUnit(dy)); }

   void expand(const LayoutSize& size) { m_size += size; }
   void expand(const LayoutRectOutsets& box) {
     m_location.move(-box.left(), -box.top());
     m_size.expand(box.left() + box.right(), box.top() + box.bottom());
   }
   void expand(LayoutUnit dw, LayoutUnit dh) { m_size.expand(dw, dh); }
   void expandEdges(LayoutUnit top,
                    LayoutUnit right,
                    LayoutUnit bottom,
                    LayoutUnit left) {
     m_location.move(-left, -top);
     m_size.expand(left + right, top + bottom);
   }
   void contract(const LayoutSize& size) { m_size -= size; }
   void contract(LayoutUnit dw, LayoutUnit dh) { m_size.expand(-dw, -dh); }
   void contract(int dw, int dh) { m_size.expand(-dw, -dh); }
   void contractEdges(LayoutUnit top,
                      LayoutUnit right,
                      LayoutUnit bottom,
                      LayoutUnit left) {
     m_location.move(left, top);
     m_size.shrink(left + right, top + bottom);
   }

   void shiftXEdgeTo(LayoutUnit edge) {
     LayoutUnit delta = edge - x();
     setX(edge);
     setWidth((width() - delta).clampNegativeToZero());
   }
   void shiftMaxXEdgeTo(LayoutUnit edge) {
     LayoutUnit delta = edge - maxX();
     setWidth((width() + delta).clampNegativeToZero());
   }
   void shiftYEdgeTo(LayoutUnit edge) {
     LayoutUnit delta = edge - y();
     setY(edge);
     setHeight((height() - delta).clampNegativeToZero());
   }
   void shiftMaxYEdgeTo(LayoutUnit edge) {
     LayoutUnit delta = edge - maxY();
     setHeight((height() + delta).clampNegativeToZero());
   }

   LayoutPoint minXMinYCorner() const {
     return m_location;
   }  // typically topLeft
   LayoutPoint maxXMinYCorner() const {
     return LayoutPoint(m_location.x() + m_size.width(), m_location.y());
   }  // typically topRight
   LayoutPoint minXMaxYCorner() const {
     return LayoutPoint(m_location.x(), m_location.y() + m_size.height());
   }  // typically bottomLeft
   LayoutPoint maxXMaxYCorner() const {
     return LayoutPoint(m_location.x() + m_size.width(),
                        m_location.y() + m_size.height());
   }  // typically bottomRight

   bool intersects(const LayoutRect&) const;
   bool contains(const LayoutRect&) const;

   // This checks to see if the rect contains x,y in the traditional sense.
   // Equivalent to checking if the rect contains a 1x1 rect below and to the
   // right of (px,py).
   bool contains(LayoutUnit px, LayoutUnit py) const {
     return px >= x() && px < maxX() && py >= y() && py < maxY();
   }
   bool contains(const LayoutPoint& point) const {
     return contains(point.x(), point.y());
   }

   void intersect(const LayoutRect&);
   void unite(const LayoutRect&);
   void uniteIfNonZero(const LayoutRect&);

   // Set this rect to be the intersection of itself and the argument rect
   // using edge-inclusive geometry.  If the two rectangles overlap but the
   // overlap region is zero-area (either because one of the two rectangles
   // is zero-area, or because the rectangles overlap at an edge or a corner),
   // the result is the zero-area intersection.  The return value indicates
   // whether the two rectangle actually have an intersection, since checking
   // the result for isEmpty() is not conclusive.
   bool inclusiveIntersect(const LayoutRect&);

   // Besides non-empty rects, this method also unites empty rects (as points or
   // line segments).  For example, union of (100, 100, 0x0) and (200, 200, 50x0)
   // is (100, 100, 150x100).
   void uniteEvenIfEmpty(const LayoutRect&);

   void inflateX(LayoutUnit dx) {
     m_location.setX(m_location.x() - dx);
     m_size.setWidth(m_size.width() + dx + dx);
   }
   void inflateY(LayoutUnit dy) {
     m_location.setY(m_location.y() - dy);
     m_size.setHeight(m_size.height() + dy + dy);
   }
   void inflate(LayoutUnit d) {
     inflateX(d);
     inflateY(d);
   }
   void inflate(int d) { inflate(LayoutUnit(d)); }
   void scale(float s);
   void scale(float xAxisScale, float yAxisScale);

   LayoutRect transposedRect() const {
     return LayoutRect(m_location.transposedPoint(), m_size.transposedSize());
   }

   static IntRect infiniteIntRect() {
     // Due to saturated arithemetic this value is not the same as
     // LayoutRect(IntRect(INT_MIN/2, INT_MIN/2, INT_MAX, INT_MAX)).
     static IntRect infiniteIntRect(
         LayoutRect(LayoutUnit::nearlyMin() / 2, LayoutUnit::nearlyMin() / 2,
                    LayoutUnit::nearlyMax(), LayoutUnit::nearlyMax()));
     return infiniteIntRect;
   }

   String toString() const;

  private:
   LayoutPoint m_location;
   LayoutSize m_size;
 };

 inline LayoutRect intersection(const LayoutRect& a, const LayoutRect& b) {
   LayoutRect c = a;
   c.intersect(b);
   return c;
 }

 inline LayoutRect unionRect(const LayoutRect& a, const LayoutRect& b) {
   LayoutRect c = a;
   c.unite(b);
   return c;
 }

 PLATFORM_EXPORT LayoutRect unionRect(const Vector<LayoutRect>&);

 inline LayoutRect unionRectEvenIfEmpty(const LayoutRect& a,
                                        const LayoutRect& b) {
   LayoutRect c = a;
   c.uniteEvenIfEmpty(b);
   return c;
 }

 PLATFORM_EXPORT LayoutRect unionRectEvenIfEmpty(const Vector<LayoutRect>&);

 ALWAYS_INLINE bool operator==(const LayoutRect& a, const LayoutRect& b) {
   return a.location() == b.location() && a.size() == b.size();
 }

 inline bool operator!=(const LayoutRect& a, const LayoutRect& b) {
   return a.location() != b.location() || a.size() != b.size();
 }

 inline IntRect pixelSnappedIntRect(const LayoutRect& rect) {
   return IntRect(roundedIntPoint(rect.location()),
                  IntSize(snapSizeToPixel(rect.width(), rect.x()),
                          snapSizeToPixel(rect.height(), rect.y())));
 }

 PLATFORM_EXPORT IntRect enclosingIntRect(const LayoutRect&);
 PLATFORM_EXPORT LayoutRect enclosingLayoutRect(const FloatRect&);

 inline IntRect pixelSnappedIntRect(LayoutUnit left,
                                    LayoutUnit top,
                                    LayoutUnit width,
                                    LayoutUnit height) {
   return IntRect(left.round(), top.round(), snapSizeToPixel(width, left),
                  snapSizeToPixel(height, top));
 }

 inline IntRect pixelSnappedIntRectFromEdges(LayoutUnit left,
                                             LayoutUnit top,
                                             LayoutUnit right,
                                             LayoutUnit bottom) {
   return IntRect(left.round(), top.round(), snapSizeToPixel(right - left, left),
                  snapSizeToPixel(bottom - top, top));
 }

 inline IntRect pixelSnappedIntRect(LayoutPoint location, LayoutSize size) {
   return IntRect(roundedIntPoint(location),
                  pixelSnappedIntSize(size, location));
 }

 // Redeclared here to avoid ODR issues.
 // See platform/testing/GeometryPrinters.h.
 void PrintTo(const LayoutRect&, std::ostream*);

 }  // namespace blink

 #endif  // LayoutRect_h
	/*
	* 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 LayoutRect_h
	#define LayoutRect_h

	#include "platform/geometry/IntRect.h"
	#include "platform/geometry/LayoutPoint.h"
	#include "platform/geometry/LayoutRectOutsets.h"
	#include "wtf/Allocator.h"
	#include "wtf/Forward.h"
	#include "wtf/Vector.h"
	#include <iosfwd>

	namespace blink {

	class FloatRect;
	class DoubleRect;

	class PLATFORM_EXPORT LayoutRect {
	DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();

	public:
	LayoutRect() {}
	LayoutRect(const LayoutPoint& location, const LayoutSize& size)
	: m_location(location), m_size(size) {}
	LayoutRect(LayoutUnit x, LayoutUnit y, LayoutUnit width, LayoutUnit height)
	: m_location(LayoutPoint(x, y)), m_size(LayoutSize(width, height)) {}
	LayoutRect(int x, int y, int width, int height)
	: m_location(LayoutPoint(x, y)), m_size(LayoutSize(width, height)) {}
	LayoutRect(const FloatPoint& location, const FloatSize& size)
	: m_location(location), m_size(size) {}
	LayoutRect(const DoublePoint& location, const DoubleSize& size)
	: m_location(location), m_size(size) {}
	LayoutRect(const IntPoint& location, const IntSize& size)
	: m_location(location), m_size(size) {}
	explicit LayoutRect(const IntRect& rect)
	: m_location(rect.location()), m_size(rect.size()) {}

	explicit LayoutRect(
	const FloatRect&); // don't do this implicitly since it's lossy
	explicit LayoutRect(
	const DoubleRect&); // don't do this implicitly since it's lossy

	LayoutPoint location() const { return m_location; }
	LayoutSize size() const { return m_size; }

	IntPoint pixelSnappedLocation() const { return roundedIntPoint(m_location); }
	IntSize pixelSnappedSize() const {
	return IntSize(snapSizeToPixel(m_size.width(), m_location.x()),
	snapSizeToPixel(m_size.height(), m_location.y()));
	}

	void setLocation(const LayoutPoint& location) { m_location = location; }
	void setSize(const LayoutSize& size) { m_size = size; }

	ALWAYS_INLINE LayoutUnit x() const { return m_location.x(); }
	ALWAYS_INLINE LayoutUnit y() const { return m_location.y(); }
	ALWAYS_INLINE LayoutUnit maxX() const { return x() + width(); }
	ALWAYS_INLINE LayoutUnit maxY() const { return y() + height(); }
	LayoutUnit width() const { return m_size.width(); }
	LayoutUnit height() const { return m_size.height(); }

	int pixelSnappedWidth() const { return snapSizeToPixel(width(), x()); }
	int pixelSnappedHeight() const { return snapSizeToPixel(height(), y()); }

	void setX(LayoutUnit x) { m_location.setX(x); }
	void setY(LayoutUnit y) { m_location.setY(y); }
	void setWidth(LayoutUnit width) { m_size.setWidth(width); }
	void setHeight(LayoutUnit height) { m_size.setHeight(height); }

	ALWAYS_INLINE bool isEmpty() const { return m_size.isEmpty(); }

	// NOTE: The result is rounded to integer values, and thus may be not the
	// exact center point.
	LayoutPoint center() const {
	return LayoutPoint(x() + width() / 2, y() + height() / 2);
	}

	void move(const LayoutSize& size) { m_location += size; }
	void move(const IntSize& size) {
	m_location.move(LayoutUnit(size.width()), LayoutUnit(size.height()));
	}
	void moveBy(const LayoutPoint& offset) {
	m_location.move(offset.x(), offset.y());
	}
	void moveBy(const IntPoint& offset) {
	m_location.move(LayoutUnit(offset.x()), LayoutUnit(offset.y()));
	}
	void move(LayoutUnit dx, LayoutUnit dy) { m_location.move(dx, dy); }
	void move(int dx, int dy) { m_location.move(LayoutUnit(dx), LayoutUnit(dy)); }

	void expand(const LayoutSize& size) { m_size += size; }
	void expand(const LayoutRectOutsets& box) {
	m_location.move(-box.left(), -box.top());
	m_size.expand(box.left() + box.right(), box.top() + box.bottom());
	}
	void expand(LayoutUnit dw, LayoutUnit dh) { m_size.expand(dw, dh); }
	void expandEdges(LayoutUnit top,
	LayoutUnit right,
	LayoutUnit bottom,
	LayoutUnit left) {
	m_location.move(-left, -top);
	m_size.expand(left + right, top + bottom);
	}
	void contract(const LayoutSize& size) { m_size -= size; }
	void contract(LayoutUnit dw, LayoutUnit dh) { m_size.expand(-dw, -dh); }
	void contract(int dw, int dh) { m_size.expand(-dw, -dh); }
	void contractEdges(LayoutUnit top,
	LayoutUnit right,
	LayoutUnit bottom,
	LayoutUnit left) {
	m_location.move(left, top);
	m_size.shrink(left + right, top + bottom);
	}

	void shiftXEdgeTo(LayoutUnit edge) {
	LayoutUnit delta = edge - x();
	setX(edge);
	setWidth((width() - delta).clampNegativeToZero());
	}
	void shiftMaxXEdgeTo(LayoutUnit edge) {
	LayoutUnit delta = edge - maxX();
	setWidth((width() + delta).clampNegativeToZero());
	}
	void shiftYEdgeTo(LayoutUnit edge) {
	LayoutUnit delta = edge - y();
	setY(edge);
	setHeight((height() - delta).clampNegativeToZero());
	}
	void shiftMaxYEdgeTo(LayoutUnit edge) {
	LayoutUnit delta = edge - maxY();
	setHeight((height() + delta).clampNegativeToZero());
	}

	LayoutPoint minXMinYCorner() const {
	return m_location;
	} // typically topLeft
	LayoutPoint maxXMinYCorner() const {
	return LayoutPoint(m_location.x() + m_size.width(), m_location.y());
	} // typically topRight
	LayoutPoint minXMaxYCorner() const {
	return LayoutPoint(m_location.x(), m_location.y() + m_size.height());
	} // typically bottomLeft
	LayoutPoint maxXMaxYCorner() const {
	return LayoutPoint(m_location.x() + m_size.width(),
	m_location.y() + m_size.height());
	} // typically bottomRight

	bool intersects(const LayoutRect&) const;
	bool contains(const LayoutRect&) const;

	// This checks to see if the rect contains x,y in the traditional sense.
	// Equivalent to checking if the rect contains a 1x1 rect below and to the
	// right of (px,py).
	bool contains(LayoutUnit px, LayoutUnit py) const {
	return px >= x() && px < maxX() && py >= y() && py < maxY();
	}
	bool contains(const LayoutPoint& point) const {
	return contains(point.x(), point.y());
	}

	void intersect(const LayoutRect&);
	void unite(const LayoutRect&);
	void uniteIfNonZero(const LayoutRect&);

	// Set this rect to be the intersection of itself and the argument rect
	// using edge-inclusive geometry. If the two rectangles overlap but the
	// overlap region is zero-area (either because one of the two rectangles
	// is zero-area, or because the rectangles overlap at an edge or a corner),
	// the result is the zero-area intersection. The return value indicates
	// whether the two rectangle actually have an intersection, since checking
	// the result for isEmpty() is not conclusive.
	bool inclusiveIntersect(const LayoutRect&);

	// Besides non-empty rects, this method also unites empty rects (as points or
	// line segments). For example, union of (100, 100, 0x0) and (200, 200, 50x0)
	// is (100, 100, 150x100).
	void uniteEvenIfEmpty(const LayoutRect&);

	void inflateX(LayoutUnit dx) {
	m_location.setX(m_location.x() - dx);
	m_size.setWidth(m_size.width() + dx + dx);
	}
	void inflateY(LayoutUnit dy) {
	m_location.setY(m_location.y() - dy);
	m_size.setHeight(m_size.height() + dy + dy);
	}
	void inflate(LayoutUnit d) {
	inflateX(d);
	inflateY(d);
	}
	void inflate(int d) { inflate(LayoutUnit(d)); }
	void scale(float s);
	void scale(float xAxisScale, float yAxisScale);

	LayoutRect transposedRect() const {
	return LayoutRect(m_location.transposedPoint(), m_size.transposedSize());
	}

	static IntRect infiniteIntRect() {
	// Due to saturated arithemetic this value is not the same as
	// LayoutRect(IntRect(INT_MIN/2, INT_MIN/2, INT_MAX, INT_MAX)).
	static IntRect infiniteIntRect(
	LayoutRect(LayoutUnit::nearlyMin() / 2, LayoutUnit::nearlyMin() / 2,
	LayoutUnit::nearlyMax(), LayoutUnit::nearlyMax()));
	return infiniteIntRect;
	}

	String toString() const;

	private:
	LayoutPoint m_location;
	LayoutSize m_size;
	};

	inline LayoutRect intersection(const LayoutRect& a, const LayoutRect& b) {
	LayoutRect c = a;
	c.intersect(b);
	return c;
	}

	inline LayoutRect unionRect(const LayoutRect& a, const LayoutRect& b) {
	LayoutRect c = a;
	c.unite(b);
	return c;
	}

	PLATFORM_EXPORT LayoutRect unionRect(const Vector<LayoutRect>&);

	inline LayoutRect unionRectEvenIfEmpty(const LayoutRect& a,
	const LayoutRect& b) {
	LayoutRect c = a;
	c.uniteEvenIfEmpty(b);
	return c;
	}

	PLATFORM_EXPORT LayoutRect unionRectEvenIfEmpty(const Vector<LayoutRect>&);

	ALWAYS_INLINE bool operator==(const LayoutRect& a, const LayoutRect& b) {
	return a.location() == b.location() && a.size() == b.size();
	}

	inline bool operator!=(const LayoutRect& a, const LayoutRect& b) {
	return a.location() != b.location() \|\| a.size() != b.size();
	}

	inline IntRect pixelSnappedIntRect(const LayoutRect& rect) {
	return IntRect(roundedIntPoint(rect.location()),
	IntSize(snapSizeToPixel(rect.width(), rect.x()),
	snapSizeToPixel(rect.height(), rect.y())));
	}

	PLATFORM_EXPORT IntRect enclosingIntRect(const LayoutRect&);
	PLATFORM_EXPORT LayoutRect enclosingLayoutRect(const FloatRect&);

	inline IntRect pixelSnappedIntRect(LayoutUnit left,
	LayoutUnit top,
	LayoutUnit width,
	LayoutUnit height) {
	return IntRect(left.round(), top.round(), snapSizeToPixel(width, left),
	snapSizeToPixel(height, top));
	}

	inline IntRect pixelSnappedIntRectFromEdges(LayoutUnit left,
	LayoutUnit top,
	LayoutUnit right,
	LayoutUnit bottom) {
	return IntRect(left.round(), top.round(), snapSizeToPixel(right - left, left),
	snapSizeToPixel(bottom - top, top));
	}

	inline IntRect pixelSnappedIntRect(LayoutPoint location, LayoutSize size) {
	return IntRect(roundedIntPoint(location),
	pixelSnappedIntSize(size, location));
	}

	// Redeclared here to avoid ODR issues.
	// See platform/testing/GeometryPrinters.h.
	void PrintTo(const LayoutRect&, std::ostream*);

	} // namespace blink

	#endif // LayoutRect_h