Floating point based Point/Size/Rect and Insets

ui/gfx/insets_f.h

Index: ui/gfx/insets_f.h
diff --git a/ui/gfx/insets_f.h b/ui/gfx/insets_f.h
new file mode 100644
index 0000000000000000000000000000000000000000..8e1ccee2fe5b4f2f31875422f9c03d70a0cfcdd6
--- /dev/null
+++ b/ui/gfx/insets_f.h
@@ -0,0 +1,89 @@
+// 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_INSETS_F_H_
+#define UI_GFX_INSETS_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::Insets. This is copied, instead of using
+// template, to avoid conflict with m19 branch.
+// TODO(oshima): Merge this to ui/gfx/insets.h using template.
+class UI_EXPORT InsetsF {
+ public:
+  InsetsF() : top_(0), left_(0), bottom_(0), right_(0) {}
+  InsetsF(float top, float left, float bottom, float right)
+      : top_(top),
+        left_(left),
+        bottom_(bottom),
+        right_(right) {}
+  ~InsetsF() {}
+
+  float top() const { return top_; }
+  float left() const { return left_; }
+  float bottom() const { return bottom_; }
+  float right() const { return right_; }
+
+  // Returns the total width taken up by the insets, which is the sum of the
+  // left and right insets.
+  float width() const { return left_ + right_; }
+
+  // Returns the total height taken up by the insets, which is the sum of the
+  // top and bottom insets.
+  float height() const { return top_ + bottom_; }
+
+  // Returns true if the insets are empty.
+  bool empty() const { return width() == 0 && height() == 0; }
+
+  void Set(float top, float left, float bottom, float right) {
+    top_ = top;
+    left_ = left;
+    bottom_ = bottom;
+    right_ = right;
+  }
+
+  bool operator==(const InsetsF& insets) const {
+    return top_ == insets.top_ && left_ == insets.left_ &&
+           bottom_ == insets.bottom_ && right_ == insets.right_;
+  }
+
+  bool operator!=(const InsetsF& insets) const {
+    return !(*this == insets);
+  }
+
+  InsetsF& operator+=(const InsetsF& insets) {
+    top_ += insets.top_;
+    left_ += insets.left_;
+    bottom_ += insets.bottom_;
+    right_ += insets.right_;
+    return *this;
+  }
+
+  InsetsF operator-() const {
+    return InsetsF(-top_, -left_, -bottom_, -right_);
+  }
+
+  // Returns a string representation of the insets.
+  std::string ToString() const;
+
+ private:
+  float top_;
+  float left_;
+  float bottom_;
+  float right_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_INSETS_F_H_