// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DoubleSize_h
#define DoubleSize_h

#include "platform/geometry/FloatSize.h"
#include "platform/geometry/IntSize.h"
#include "wtf/Allocator.h"
#include "wtf/Forward.h"
#include "wtf/MathExtras.h"

namespace blink {

class LayoutSize;

class PLATFORM_EXPORT DoubleSize {
  DISALLOW_NEW();

 public:
  DoubleSize() : m_width(0), m_height(0) {}
  DoubleSize(double width, double height) : m_width(width), m_height(height) {}
  DoubleSize(const IntSize& p) : m_width(p.width()), m_height(p.height()) {}
  DoubleSize(const FloatSize& s) : m_width(s.width()), m_height(s.height()) {}
  explicit DoubleSize(const LayoutSize&);

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

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

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

  bool isZero() const;

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

  void scale(float widthScale, float heightScale) {
    m_width = m_width * widthScale;
    m_height = m_height * heightScale;
  }

  void scale(float scale) { this->scale(scale, scale); }

  String toString() const;

 private:
  double m_width, m_height;
};

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

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

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

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

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

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

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

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

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

inline FloatSize toFloatSize(const DoubleSize& p) {
  return FloatSize(p.width(), p.height());
}

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

}  // namespace blink

#endif  // DoubleSize_h
