Floating point based Point/Size/Rect and Insets

ui/gfx/rect_f.h

Index: ui/gfx/rect_f.h
diff --git a/ui/gfx/rect_f.h b/ui/gfx/rect_f.h
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+// Copyright (c) 2011 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_RECT_F_H_
+#define UI_GFX_RECT_F_H_
+#pragma once
+
+#include <string>
+
+#include "ui/gfx/point_f.h"
+#include "ui/gfx/size_f.h"
+
+#if !defined(ENABLE_DIP)
+#error "This class should be used only when DIP feature is enabled"
+#endif
+
+namespace gfx {
+
+class InsetsF;
+
+// A floating versino of gfx::Rect. This is copied, instead of using
+// template, to avoid conflict with m19 branch.
+// TODO(oshima): Merge this to ui/gfx/rect.h using template.
+class UI_EXPORT RectF {
+ public:
+  RectF();
+  RectF(float width, float height);
+  RectF(float x, float y, float width, float height);
+  explicit RectF(const gfx::SizeF& size);
+  RectF(const gfx::PointF& origin, const gfx::SizeF& size);
+
+  ~RectF();
+
+  float x() const { return origin_.x(); }
+  void set_x(float x) { origin_.set_x(x); }
+
+  float y() const { return origin_.y(); }
+  void set_y(float y) { origin_.set_y(y); }
+
+  float width() const { return size_.width(); }
+  void set_width(float width) { size_.set_width(width); }
+
+  float height() const { return size_.height(); }
+  void set_height(float height) { size_.set_height(height); }
+
+  const gfx::PointF& origin() const { return origin_; }
+  void set_origin(const gfx::PointF& origin) { origin_ = origin; }
+
+  const gfx::SizeF& size() const { return size_; }
+  void set_size(const gfx::SizeF& size) { size_ = size; }
+
+  float right() const { return x() + width(); }
+  float bottom() const { return y() + height(); }
+
+  void SetRect(float x, float y, float width, float height);
+
+  void Inset(float horizontal, float vertical) {
+    Inset(horizontal, vertical, horizontal, vertical);
+  }
+  // Shrink the rectangle by the given insets.
+  void Inset(const gfx::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 gfx::PointF& point) {
+    Offset(point.x(), point.y());
+  }
+
+  // Returns true if the area of the rectangle is zero.
+  bool IsEmpty() const { return size_.IsEmpty(); }
+
+  bool operator==(const RectF& other) const;
+
+  bool operator!=(const RectF& other) const {
+    return !(*this == other);
+  }
+
+  // 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 gfx::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.
+  bool Intersects(const RectF& rect) const;
+
+  // Computes the intersection of this rectangle with the given rectangle.
+  RectF Intersect(const RectF& rect) const;
+
+  // Computes the union of this rectangle with the given rectangle.  The union
+  // is the smallest rectangle containing both rectangles.
+  RectF Union(const RectF& rect) const;
+
+  // Computes the rectangle resulting from subtracting |rect| from |this|.  If
+  // |rect| does not intersect completely in either the x- or y-direction, then
+  // |*this| is returned.  If |rect| contains |this|, then an empty Rect is
+  // returned.
+  RectF Subtract(const RectF& rect) const;
+
+  // Returns true if this rectangle equals that of the supplied rectangle.
+  bool Equals(const RectF& rect) const {
+    return *this == rect;
+  }
+
+  // Fits as much of the receiving rectangle into the supplied rectangle as
+  // possible, returning 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.
+  RectF AdjustToFit(const RectF& rect) const;
+
+  // Returns the center of this rectangle.
+  PointF CenterPoint() const;
+
+  // Return a rectangle that has the same center point but with a size capped
+  // at given |size|.
+  RectF Center(const gfx::SizeF& size) const;
+
+  // Splits |this| in two halves, |left_half| and |right_half|.
+  void SplitVertically(gfx::RectF* left_half, gfx::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 gfx::RectF& rect) const;
+
+  std::string ToString() const;
+
+ private:
+  gfx::PointF origin_;
+  gfx::SizeF size_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_RECT_H_