Floating point based Point/Size/Rect and Insets

ui/gfx/size_f.h

Index: ui/gfx/size_f.h
diff --git a/ui/gfx/size_f.h b/ui/gfx/size_f.h
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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_SIZE_F_H_
+#define UI_GFX_SIZE_F_H_
+#pragma once
+
+#include <string>
+
+#include "build/build_config.h"
+#include "ui/base/ui_export.h"
+
+#if !defined(ENABLE_DIP)
+#error "This class should be used only when DIP feature is enabled"
+#endif
+
+namespace gfx {
+
+// A floating versino of gfx::Size. This is copied, instead of using
+// template, to avoid conflict with m19 branch.
+// TODO(oshima): Merge this to ui/gfx/size.h using template.
+class UI_EXPORT SizeF {
+ public:
+  SizeF();
+  SizeF(float width, float height);
+  ~SizeF();
+
+  float width() const { return width_; }
+  float height() const { return height_; }
+
+  float GetArea() const { return width_ * height_; }
+
+  void SetSize(float width, float height) {
+    set_width(width);
+    set_height(height);
+  }
+
+  void Enlarge(float width, float height) {
+    set_width(width_ + width);
+    set_height(height_ + height);
+  }
+
+  void set_width(float width);
+  void set_height(float height);
+
+  bool operator==(const SizeF& s) const {
+    return width_ == s.width_ && height_ == s.height_;
+  }
+
+  bool operator!=(const SizeF& s) const {
+    return !(*this == s);
+  }
+
+  bool IsEmpty() const {
+    // Size doesn't allow negative dimensions, so testing for 0 is enough.
+    return (width_ == 0) || (height_ == 0);
+  }
+
+  std::string ToString() const;
+
+ private:
+  float width_;
+  float height_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_SIZE_F_H_