| // Copyright 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_INSETS_BASE_H_ |
| #define UI_GFX_GEOMETRY_INSETS_BASE_H_ |
| |
| #include "ui/gfx/gfx_export.h" |
| |
| namespace gfx { |
| |
| // An insets represents the borders of a container (the space the container must |
| // leave at each of its edges). |
| template<typename Class, typename Type> |
| class GFX_EXPORT InsetsBase { |
| public: |
| Type top() const { return top_; } |
| Type left() const { return left_; } |
| Type bottom() const { return bottom_; } |
| Type right() const { return right_; } |
| |
| // Returns the total width taken up by the insets, which is the sum of the |
| // left and right insets. |
| Type width() const { return left_ + right_; } |
| |
| // Returns the total height taken up by the insets, which is the sum of the |
| // top and bottom insets. |
| Type height() const { return top_ + bottom_; } |
| |
| // Returns true if the insets are empty. |
| bool empty() const { return width() == 0 && height() == 0; } |
| |
| void Set(Type top, Type left, Type bottom, Type right) { |
| top_ = top; |
| left_ = left; |
| bottom_ = bottom; |
| right_ = right; |
| } |
| |
| bool operator==(const Class& insets) const { |
| return top_ == insets.top_ && left_ == insets.left_ && |
| bottom_ == insets.bottom_ && right_ == insets.right_; |
| } |
| |
| bool operator!=(const Class& insets) const { |
| return !(*this == insets); |
| } |
| |
| void operator+=(const Class& insets) { |
| top_ += insets.top_; |
| left_ += insets.left_; |
| bottom_ += insets.bottom_; |
| right_ += insets.right_; |
| } |
| |
| Class operator-() const { |
| return Class(-top_, -left_, -bottom_, -right_); |
| } |
| |
| protected: |
| InsetsBase(Type top, Type left, Type bottom, Type right) |
| : top_(top), |
| left_(left), |
| bottom_(bottom), |
| right_(right) {} |
| |
| // Destructor is intentionally made non virtual and protected. |
| // Do not make this public. |
| ~InsetsBase() {} |
| |
| private: |
| Type top_; |
| Type left_; |
| Type bottom_; |
| Type right_; |
| }; |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_GEOMETRY_INSETS_BASE_H_ |