1 files changed, 69 insertions, 0 deletions
diff --git a/chromium/ui/gfx/geometry/size_base.h b/chromium/ui/gfx/geometry/size_base.h
new file mode 100644
index 00000000000..88a98ef4584
--- /dev/null
+++ b/chromium/ui/gfx/geometry/size_base.h
@@ -0,0 +1,69 @@
+// 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_SIZE_BASE_H_
+#define UI_GFX_GEOMETRY_SIZE_BASE_H_
+
+#include "ui/gfx/gfx_export.h"
+
+namespace gfx {
+
+// A size has width and height values.
+template<typename Class, typename Type>
+class GFX_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) {
+    width_ = width < 0 ? 0 : width;
+  }
+  void set_height(Type height) {
+    height_ = height < 0 ? 0 : height;
+  }
+
+  void SetToMin(const Class& other) {
+    width_ = width_ <= other.width_ ? width_ : other.width_;
+    height_ = height_ <= other.height_ ? height_ : other.height_;
+  }
+
+  void SetToMax(const Class& other) {
+    width_ = width_ >= other.width_ ? width_ : other.width_;
+    height_ = height_ >= other.height_ ? height_ : other.height_;
+  }
+
+  bool IsEmpty() const {
+    return (width_ == 0) || (height_ == 0);
+  }
+
+ protected:
+  SizeBase(Type width, Type height)
+      : width_(width < 0 ? 0 : width),
+      height_(height < 0 ? 0 : height) {
+  }
+
+  // Destructor is intentionally made non virtual and protected.
+  // Do not make this public.
+  ~SizeBase() {}
+
+ private:
+  Type width_;
+  Type height_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_GEOMETRY_SIZE_BASE_H_