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// 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_INSETS_BASE_H_
#define UI_GFX_INSETS_BASE_H_
#include "ui/base/ui_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 UI_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_INSETS_BASE_H_
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