flutter_flutter/sky/engine/platform/geometry/LayoutPoint.h

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#ifndef SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTPOINT_H_
#define SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTPOINT_H_

#include "flutter/sky/engine/platform/geometry/FloatPoint.h"
#include "flutter/sky/engine/platform/geometry/LayoutSize.h"
#include "flutter/sky/engine/wtf/MathExtras.h"

namespace blink {

class LayoutPoint {
 public:
  LayoutPoint() {}
  LayoutPoint(LayoutUnit x, LayoutUnit y) : m_x(x), m_y(y) {}
  LayoutPoint(const IntPoint& point) : m_x(point.x()), m_y(point.y()) {}
  explicit LayoutPoint(const FloatPoint& size) : m_x(size.x()), m_y(size.y()) {}
  explicit LayoutPoint(const LayoutSize& size)
      : m_x(size.width()), m_y(size.height()) {}

  static LayoutPoint zero() { return LayoutPoint(); }

  LayoutUnit x() const { return m_x; }
  LayoutUnit y() const { return m_y; }

  void setX(LayoutUnit x) { m_x = x; }
  void setY(LayoutUnit y) { m_y = y; }

  void move(const LayoutSize& s) { move(s.width(), s.height()); }
  void moveBy(const LayoutPoint& offset) { move(offset.x(), offset.y()); }
  void move(LayoutUnit dx, LayoutUnit dy) {
    m_x += dx;
    m_y += dy;
  }
  void scale(float sx, float sy) {
    m_x *= sx;
    m_y *= sy;
  }

  LayoutPoint expandedTo(const LayoutPoint& other) const {
    return LayoutPoint(std::max(m_x, other.m_x), std::max(m_y, other.m_y));
  }

  LayoutPoint shrunkTo(const LayoutPoint& other) const {
    return LayoutPoint(std::min(m_x, other.m_x), std::min(m_y, other.m_y));
  }

  void clampNegativeToZero() { *this = expandedTo(zero()); }

  LayoutPoint transposedPoint() const { return LayoutPoint(m_y, m_x); }

 private:
  LayoutUnit m_x, m_y;
};

ALWAYS_INLINE LayoutPoint& operator+=(LayoutPoint& a, const LayoutSize& b) {
  a.move(b.width(), b.height());
  return a;
}

ALWAYS_INLINE LayoutPoint& operator-=(LayoutPoint& a, const LayoutSize& b) {
  a.move(-b.width(), -b.height());
  return a;
}

inline LayoutPoint operator+(const LayoutPoint& a, const LayoutSize& b) {
  return LayoutPoint(a.x() + b.width(), a.y() + b.height());
}

ALWAYS_INLINE LayoutPoint operator+(const LayoutPoint& a,
                                    const LayoutPoint& b) {
  return LayoutPoint(a.x() + b.x(), a.y() + b.y());
}

ALWAYS_INLINE LayoutSize operator-(const LayoutPoint& a, const LayoutPoint& b) {
  return LayoutSize(a.x() - b.x(), a.y() - b.y());
}

inline LayoutPoint operator-(const LayoutPoint& a, const LayoutSize& b) {
  return LayoutPoint(a.x() - b.width(), a.y() - b.height());
}

inline LayoutPoint operator-(const LayoutPoint& point) {
  return LayoutPoint(-point.x(), -point.y());
}

ALWAYS_INLINE bool operator==(const LayoutPoint& a, const LayoutPoint& b) {
  return a.x() == b.x() && a.y() == b.y();
}

inline bool operator!=(const LayoutPoint& a, const LayoutPoint& b) {
  return a.x() != b.x() || a.y() != b.y();
}

inline LayoutPoint toPoint(const LayoutSize& size) {
  return LayoutPoint(size.width(), size.height());
}

inline LayoutPoint toLayoutPoint(const LayoutSize& p) {
  return LayoutPoint(p.width(), p.height());
}

inline LayoutSize toSize(const LayoutPoint& a) {
  return LayoutSize(a.x(), a.y());
}

inline IntPoint flooredIntPoint(const LayoutPoint& point) {
  return IntPoint(point.x().floor(), point.y().floor());
}

inline IntPoint roundedIntPoint(const LayoutPoint& point) {
  return IntPoint(point.x().round(), point.y().round());
}

inline IntPoint roundedIntPoint(const LayoutSize& size) {
  return IntPoint(size.width().round(), size.height().round());
}

inline IntPoint ceiledIntPoint(const LayoutPoint& point) {
  return IntPoint(point.x().ceil(), point.y().ceil());
}

inline LayoutPoint flooredLayoutPoint(const FloatPoint& p) {
  return LayoutPoint(LayoutUnit::fromFloatFloor(p.x()),
                     LayoutUnit::fromFloatFloor(p.y()));
}

inline LayoutPoint ceiledLayoutPoint(const FloatPoint& p) {
  return LayoutPoint(LayoutUnit::fromFloatCeil(p.x()),
                     LayoutUnit::fromFloatCeil(p.y()));
}

inline IntSize pixelSnappedIntSize(const LayoutSize& s, const LayoutPoint& p) {
  return IntSize(snapSizeToPixel(s.width(), p.x()),
                 snapSizeToPixel(s.height(), p.y()));
}

inline LayoutPoint roundedLayoutPoint(const FloatPoint& p) {
  return LayoutPoint(p);
}

inline LayoutSize toLayoutSize(const LayoutPoint& p) {
  return LayoutSize(p.x(), p.y());
}

inline LayoutPoint flooredLayoutPoint(const FloatSize& s) {
  return flooredLayoutPoint(FloatPoint(s));
}

}  // namespace blink

#endif  // SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTPOINT_H_