1 files changed, 126 insertions, 0 deletions
diff --git a/ui/gfx/geometry/point_f.h b/ui/gfx/geometry/point_f.h
new file mode 100644
index 0000000..5d92b11
--- /dev/null
+++ b/ui/gfx/geometry/point_f.h
@@ -0,0 +1,126 @@
+// 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_