1 files changed, 242 insertions, 0 deletions
diff --git a/ui/gfx/geometry/rect_f.h b/ui/gfx/geometry/rect_f.h
new file mode 100644
index 0000000000..9d99052c4a
--- /dev/null
+++ b/ui/gfx/geometry/rect_f.h
@@ -0,0 +1,242 @@
+// 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_RECT_F_H_
+#define UI_GFX_GEOMETRY_RECT_F_H_
+
+#include <iosfwd>
+#include <string>
+
+#include "build/build_config.h"
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size_f.h"
+#include "ui/gfx/geometry/vector2d_f.h"
+
+#if defined(OS_MACOSX)
+typedef struct CGRect CGRect;
+#endif
+
+namespace gfx {
+
+class InsetsF;
+
+// A floating version of gfx::Rect.
+class GFX_EXPORT RectF {
+ public:
+  constexpr RectF() = default;
+  constexpr RectF(float width, float height) : size_(width, height) {}
+  constexpr RectF(float x, float y, float width, float height)
+      : origin_(x, y), size_(width, height) {}
+  constexpr explicit RectF(const SizeF& size) : size_(size) {}
+  constexpr RectF(const PointF& origin, const SizeF& size)
+      : origin_(origin), size_(size) {}
+
+  constexpr explicit RectF(const Rect& r)
+      : RectF(static_cast<float>(r.x()),
+              static_cast<float>(r.y()),
+              static_cast<float>(r.width()),
+              static_cast<float>(r.height())) {}
+
+#if defined(OS_MACOSX)
+  explicit RectF(const CGRect& r);
+  // Construct an equivalent CoreGraphics object.
+  CGRect ToCGRect() const;
+#endif
+
+  constexpr float x() const { return origin_.x(); }
+  void set_x(float x) { origin_.set_x(x); }
+
+  constexpr float y() const { return origin_.y(); }
+  void set_y(float y) { origin_.set_y(y); }
+
+  constexpr float width() const { return size_.width(); }
+  void set_width(float width) { size_.set_width(width); }
+
+  constexpr float height() const { return size_.height(); }
+  void set_height(float height) { size_.set_height(height); }
+
+  constexpr const PointF& origin() const { return origin_; }
+  void set_origin(const PointF& origin) { origin_ = origin; }
+
+  constexpr const SizeF& size() const { return size_; }
+  void set_size(const SizeF& size) { size_ = size; }
+
+  constexpr float right() const { return x() + width(); }
+  constexpr float bottom() const { return y() + height(); }
+
+  constexpr PointF top_right() const { return PointF(right(), y()); }
+  constexpr PointF bottom_left() const { return PointF(x(), bottom()); }
+  constexpr PointF bottom_right() const { return PointF(right(), bottom()); }
+
+  Vector2dF OffsetFromOrigin() const { return Vector2dF(x(), y()); }
+
+  void SetRect(float x, float y, float width, float height) {
+    origin_.SetPoint(x, y);
+    size_.SetSize(width, height);
+  }
+
+  // Shrink the rectangle by a horizontal and vertical distance on all sides.
+  void Inset(float horizontal, float vertical) {
+    Inset(horizontal, vertical, horizontal, vertical);
+  }
+
+  // Shrink the rectangle by the given insets.
+  void Inset(const InsetsF& insets);
+
+  // Shrink the rectangle by the specified amount on each side.
+  void Inset(float left, float top, float right, float bottom);
+
+  // Move the rectangle by a horizontal and vertical distance.
+  void Offset(float horizontal, float vertical);
+  void Offset(const Vector2dF& distance) { Offset(distance.x(), distance.y()); }
+  void operator+=(const Vector2dF& offset);
+  void operator-=(const Vector2dF& offset);
+
+  InsetsF InsetsFrom(const RectF& inner) const;
+
+  // Returns true if the area of the rectangle is zero.
+  bool IsEmpty() const { return size_.IsEmpty(); }
+
+  // A rect is less than another rect if its origin is less than
+  // the other rect's origin. If the origins are equal, then the
+  // shortest rect is less than the other. If the origin and the
+  // height are equal, then the narrowest rect is less than.
+  // This comparison is required to use Rects in sets, or sorted
+  // vectors.
+  bool operator<(const RectF& other) const;
+
+  // Returns true if the point identified by point_x and point_y falls inside
+  // this rectangle.  The point (x, y) is inside the rectangle, but the
+  // point (x + width, y + height) is not.
+  bool Contains(float point_x, float point_y) const;
+
+  // Returns true if the specified point is contained by this rectangle.
+  bool Contains(const PointF& point) const {
+    return Contains(point.x(), point.y());
+  }
+
+  // Returns true if this rectangle contains the specified rectangle.
+  bool Contains(const RectF& rect) const;
+
+  // Returns true if this rectangle intersects the specified rectangle.
+  // An empty rectangle doesn't intersect any rectangle.
+  bool Intersects(const RectF& rect) const;
+
+  // Computes the intersection of this rectangle with the given rectangle.
+  void Intersect(const RectF& rect);
+
+  // Computes the union of this rectangle with the given rectangle.  The union
+  // is the smallest rectangle containing both rectangles.
+  void Union(const RectF& rect);
+
+  // Computes the rectangle resulting from subtracting |rect| from |*this|,
+  // i.e. the bounding rect of |Region(*this) - Region(rect)|.
+  void Subtract(const RectF& rect);
+
+  // Fits as much of the receiving rectangle into the supplied rectangle as
+  // possible, becoming the result. For example, if the receiver had
+  // a x-location of 2 and a width of 4, and the supplied rectangle had
+  // an x-location of 0 with a width of 5, the returned rectangle would have
+  // an x-location of 1 with a width of 4.
+  void AdjustToFit(const RectF& rect);
+
+  // Returns the center of this rectangle.
+  PointF CenterPoint() const;
+
+  // Becomes a rectangle that has the same center point but with a size capped
+  // at given |size|.
+  void ClampToCenteredSize(const SizeF& size);
+
+  // Splits |this| in two halves, |left_half| and |right_half|.
+  void SplitVertically(RectF* left_half, RectF* right_half) const;
+
+  // Returns true if this rectangle shares an entire edge (i.e., same width or
+  // same height) with the given rectangle, and the rectangles do not overlap.
+  bool SharesEdgeWith(const RectF& rect) const;
+
+  // Returns the manhattan distance from the rect to the point. If the point is
+  // inside the rect, returns 0.
+  float ManhattanDistanceToPoint(const PointF& point) const;
+
+  // Returns the manhattan distance between the contents of this rect and the
+  // contents of the given rect. That is, if the intersection of the two rects
+  // is non-empty then the function returns 0. If the rects share a side, it
+  // returns the smallest non-zero value appropriate for float.
+  float ManhattanInternalDistance(const RectF& rect) const;
+
+  // Scales the rectangle by |scale|.
+  void Scale(float scale) {
+    Scale(scale, scale);
+  }
+
+  void Scale(float x_scale, float y_scale) {
+    set_origin(ScalePoint(origin(), x_scale, y_scale));
+    set_size(ScaleSize(size(), x_scale, y_scale));
+  }
+
+  // This method reports if the RectF can be safely converted to an integer
+  // Rect. When it is false, some dimension of the RectF is outside the bounds
+  // of what an integer can represent, and converting it to a Rect will require
+  // clamping.
+  bool IsExpressibleAsRect() const;
+
+  std::string ToString() const;
+
+ private:
+  PointF origin_;
+  SizeF size_;
+};
+
+inline bool operator==(const RectF& lhs, const RectF& rhs) {
+  return lhs.origin() == rhs.origin() && lhs.size() == rhs.size();
+}
+
+inline bool operator!=(const RectF& lhs, const RectF& rhs) {
+  return !(lhs == rhs);
+}
+
+inline RectF operator+(const RectF& lhs, const Vector2dF& rhs) {
+  return RectF(lhs.x() + rhs.x(), lhs.y() + rhs.y(),
+      lhs.width(), lhs.height());
+}
+
+inline RectF operator-(const RectF& lhs, const Vector2dF& rhs) {
+  return RectF(lhs.x() - rhs.x(), lhs.y() - rhs.y(),
+      lhs.width(), lhs.height());
+}
+
+inline RectF operator+(const Vector2dF& lhs, const RectF& rhs) {
+  return rhs + lhs;
+}
+
+GFX_EXPORT RectF IntersectRects(const RectF& a, const RectF& b);
+GFX_EXPORT RectF UnionRects(const RectF& a, const RectF& b);
+GFX_EXPORT RectF SubtractRects(const RectF& a, const RectF& b);
+
+inline RectF ScaleRect(const RectF& r, float x_scale, float y_scale) {
+  return RectF(r.x() * x_scale, r.y() * y_scale,
+       r.width() * x_scale, r.height() * y_scale);
+}
+
+inline RectF ScaleRect(const RectF& r, float scale) {
+  return ScaleRect(r, scale, scale);
+}
+
+// Constructs a rectangle with |p1| and |p2| as opposite corners.
+//
+// This could also be thought of as "the smallest rect that contains both
+// points", except that we consider points on the right/bottom edges of the
+// rect to be outside the rect.  So technically one or both points will not be
+// contained within the rect, because they will appear on one of these edges.
+GFX_EXPORT RectF BoundingRect(const PointF& p1, const PointF& p2);
+
+// 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 RectF& rect, ::std::ostream* os);
+
+}  // namespace gfx
+
+#endif  // UI_GFX_GEOMETRY_RECT_F_H_