/*
 * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
 * Copyright (C) 2005 Nokia.  All rights reserved.
 *               2008 Eric Seidel <eric@webkit.org>
 *
 * 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.
 */

#ifndef FloatSize_h
#define FloatSize_h

#include "platform/geometry/IntPoint.h"
#include "third_party/skia/include/core/SkSize.h"
#include "wtf/Allocator.h"
#include "wtf/Forward.h"
#include "wtf/MathExtras.h"
#include <iosfwd>

#if OS(MACOSX)
typedef struct CGSize CGSize;

#ifdef __OBJC__
#import <Foundation/Foundation.h>
#endif
#endif

namespace blink {

class IntSize;
class LayoutSize;

class PLATFORM_EXPORT FloatSize {
  DISALLOW_NEW();

 public:
  FloatSize() : m_width(0), m_height(0) {}
  FloatSize(float width, float height) : m_width(width), m_height(height) {}
  explicit FloatSize(const IntSize& size)
      : m_width(size.width()), m_height(size.height()) {}
  FloatSize(const SkSize& size)
      : m_width(size.width()), m_height(size.height()) {}
  explicit FloatSize(const LayoutSize&);

  static FloatSize narrowPrecision(double width, double height);

  float width() const { return m_width; }
  float height() const { return m_height; }

  void setWidth(float width) { m_width = width; }
  void setHeight(float height) { m_height = height; }

  bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
  bool isZero() const;
  bool isExpressibleAsIntSize() const;

  float aspectRatio() const { return m_width / m_height; }

  void expand(float width, float height) {
    m_width += width;
    m_height += height;
  }

  void scale(float s) { scale(s, s); }

  void scale(float scaleX, float scaleY) {
    m_width *= scaleX;
    m_height *= scaleY;
  }

  void scaleAndFloor(float scale) {
    m_width = floorf(m_width * scale);
    m_height = floorf(m_height * scale);
  }

  FloatSize expandedTo(const FloatSize& other) const {
    return FloatSize(m_width > other.m_width ? m_width : other.m_width,
                     m_height > other.m_height ? m_height : other.m_height);
  }

  FloatSize shrunkTo(const FloatSize& other) const {
    return FloatSize(m_width < other.m_width ? m_width : other.m_width,
                     m_height < other.m_height ? m_height : other.m_height);
  }

  float diagonalLength() const;
  float diagonalLengthSquared() const {
    return m_width * m_width + m_height * m_height;
  }

  FloatSize transposedSize() const { return FloatSize(m_height, m_width); }

  FloatSize scaledBy(float scale) const { return scaledBy(scale, scale); }

  FloatSize scaledBy(float scaleX, float scaleY) const {
    return FloatSize(m_width * scaleX, m_height * scaleY);
  }

#if OS(MACOSX)
  explicit FloatSize(
      const CGSize&);  // don't do this implicitly since it's lossy
  operator CGSize() const;
#if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
  explicit FloatSize(
      const NSSize&);  // don't do this implicitly since it's lossy
  operator NSSize() const;
#endif
#endif

  operator SkSize() const { return SkSize::Make(m_width, m_height); }

  String toString() const;

 private:
  float m_width, m_height;
};

inline FloatSize& operator+=(FloatSize& a, const FloatSize& b) {
  a.setWidth(a.width() + b.width());
  a.setHeight(a.height() + b.height());
  return a;
}

inline FloatSize& operator-=(FloatSize& a, const FloatSize& b) {
  a.setWidth(a.width() - b.width());
  a.setHeight(a.height() - b.height());
  return a;
}

inline FloatSize operator+(const FloatSize& a, const FloatSize& b) {
  return FloatSize(a.width() + b.width(), a.height() + b.height());
}

inline FloatSize operator-(const FloatSize& a, const FloatSize& b) {
  return FloatSize(a.width() - b.width(), a.height() - b.height());
}

inline FloatSize operator-(const FloatSize& size) {
  return FloatSize(-size.width(), -size.height());
}

inline FloatSize operator*(const FloatSize& a, const float b) {
  return FloatSize(a.width() * b, a.height() * b);
}

inline FloatSize operator*(const float a, const FloatSize& b) {
  return FloatSize(a * b.width(), a * b.height());
}

inline bool operator==(const FloatSize& a, const FloatSize& b) {
  return a.width() == b.width() && a.height() == b.height();
}

inline bool operator!=(const FloatSize& a, const FloatSize& b) {
  return a.width() != b.width() || a.height() != b.height();
}

inline IntSize roundedIntSize(const FloatSize& p) {
  return IntSize(clampTo<int>(roundf(p.width())),
                 clampTo<int>(roundf(p.height())));
}

inline IntSize flooredIntSize(const FloatSize& p) {
  return IntSize(clampTo<int>(floorf(p.width())),
                 clampTo<int>(floorf(p.height())));
}

inline IntSize expandedIntSize(const FloatSize& p) {
  return IntSize(clampTo<int>(ceilf(p.width())),
                 clampTo<int>(ceilf(p.height())));
}

inline IntPoint flooredIntPoint(const FloatSize& p) {
  return IntPoint(clampTo<int>(floorf(p.width())),
                  clampTo<int>(floorf(p.height())));
}

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

}  // namespace blink

#endif  // FloatSize_h
