1 files changed, 62 insertions, 0 deletions
diff --git a/ui/gfx/size_base.h b/ui/gfx/size_base.h
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+++ b/ui/gfx/size_base.h
@@ -0,0 +1,62 @@
+// 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_BASE_H_
+#define UI_GFX_SIZE_BASE_H_
+#pragma once
+
+#include <string>
+
+#include "build/build_config.h"
+#include "ui/base/ui_export.h"
+
+namespace gfx {
+
+// A size has width and height values.
+template<typename Class, typename Type>
+class UI_EXPORT SizeBase {
+ public:
+  Type width() const { return width_; }
+  Type height() const { return height_; }
+
+  Type GetArea() const { return width_ * height_; }
+
+  void SetSize(Type width, Type height) {
+    set_width(width);
+    set_height(height);
+  }
+
+  void Enlarge(Type width, Type height) {
+    set_width(width_ + width);
+    set_height(height_ + height);
+  }
+
+  void set_width(Type width);
+  void set_height(Type height);
+
+  bool operator==(const Class& s) const {
+    return width_ == s.width_ && height_ == s.height_;
+  }
+
+  bool operator!=(const Class& 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);
+  }
+
+ protected:
+  SizeBase(Type width, Type height);
+  virtual ~SizeBase();
+
+ private:
+  Type width_;
+  Type height_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_SIZE_BASE_H_