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// Copyright (c) 2012 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 UI_GFX_GEOMETRY_POINT_F_H_
#define UI_GFX_GEOMETRY_POINT_F_H_
#include <iosfwd>
#include <string>
#include <tuple>
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/vector2d_f.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
// A floating version of gfx::Point.
class GFX_EXPORT PointF {
public:
constexpr PointF() : x_(0.f), y_(0.f) {}
constexpr PointF(float x, float y) : x_(x), y_(y) {}
constexpr explicit PointF(const Point& p)
: PointF(static_cast<float>(p.x()), static_cast<float>(p.y())) {}
constexpr float x() const { return x_; }
constexpr float y() const { return y_; }
void set_x(float x) { x_ = x; }
void set_y(float y) { y_ = y; }
void SetPoint(float x, float y) {
x_ = x;
y_ = y;
}
void Offset(float delta_x, float delta_y) {
x_ += delta_x;
y_ += delta_y;
}
void operator+=(const Vector2dF& vector) {
x_ += vector.x();
y_ += vector.y();
}
void operator-=(const Vector2dF& vector) {
x_ -= vector.x();
y_ -= vector.y();
}
void SetToMin(const PointF& other);
void SetToMax(const PointF& other);
bool IsOrigin() const { return x_ == 0 && y_ == 0; }
Vector2dF OffsetFromOrigin() const { return Vector2dF(x_, y_); }
// A point is less than another point if its y-value is closer
// to the origin. If the y-values are the same, then point with
// the x-value closer to the origin is considered less than the
// other.
// This comparison is required to use PointF in sets, or sorted
// vectors.
bool operator<(const PointF& rhs) const {
return std::tie(y_, x_) < std::tie(rhs.y_, rhs.x_);
}
void Scale(float scale) {
Scale(scale, scale);
}
void Scale(float x_scale, float y_scale) {
SetPoint(x() * x_scale, y() * y_scale);
}
// Returns a string representation of point.
std::string ToString() const;
private:
float x_;
float y_;
};
inline bool operator==(const PointF& lhs, const PointF& rhs) {
return lhs.x() == rhs.x() && lhs.y() == rhs.y();
}
inline bool operator!=(const PointF& lhs, const PointF& rhs) {
return !(lhs == rhs);
}
inline PointF operator+(const PointF& lhs, const Vector2dF& rhs) {
PointF result(lhs);
result += rhs;
return result;
}
inline PointF operator-(const PointF& lhs, const Vector2dF& rhs) {
PointF result(lhs);
result -= rhs;
return result;
}
inline Vector2dF operator-(const PointF& lhs, const PointF& rhs) {
return Vector2dF(lhs.x() - rhs.x(), lhs.y() - rhs.y());
}
inline PointF PointAtOffsetFromOrigin(const Vector2dF& offset_from_origin) {
return PointF(offset_from_origin.x(), offset_from_origin.y());
}
GFX_EXPORT PointF ScalePoint(const PointF& p, float x_scale, float y_scale);
inline PointF ScalePoint(const PointF& p, float scale) {
return ScalePoint(p, scale, scale);
}
// This is declared here for use in gtest-based unit tests but is defined in
// the //ui/gfx:test_support target. Depend on that to use this in your unit
// test. This should not be used in production code - call ToString() instead.
void PrintTo(const PointF& point, ::std::ostream* os);
} // namespace gfx
#endif // UI_GFX_GEOMETRY_POINT_F_H_
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