| // 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_INSETS_H_ |
| #define UI_GFX_GEOMETRY_INSETS_H_ |
| |
| #include <string> |
| |
| #include "ui/gfx/geometry/insets_f.h" |
| #include "ui/gfx/gfx_export.h" |
| |
| namespace gfx { |
| |
| class Vector2d; |
| |
| // Represents the widths of the four borders or margins of an unspecified |
| // rectangle. An Insets stores the thickness of the top, left, bottom and right |
| // edges, without storing the actual size and position of the rectangle itself. |
| // |
| // This can be used to represent a space within a rectangle, by "shrinking" the |
| // rectangle by the inset amount on all four sides. Alternatively, it can |
| // represent a border that has a different thickness on each side. |
| class GFX_EXPORT Insets { |
| public: |
| constexpr Insets() : top_(0), left_(0), bottom_(0), right_(0) {} |
| constexpr explicit Insets(int all) |
| : top_(all), left_(all), bottom_(all), right_(all) {} |
| constexpr Insets(int vertical, int horizontal) |
| : top_(vertical), |
| left_(horizontal), |
| bottom_(vertical), |
| right_(horizontal) {} |
| constexpr Insets(int top, int left, int bottom, int right) |
| : top_(top), left_(left), bottom_(bottom), right_(right) {} |
| |
| constexpr int top() const { return top_; } |
| constexpr int left() const { return left_; } |
| constexpr int bottom() const { return bottom_; } |
| constexpr int right() const { return right_; } |
| |
| // Returns the total width taken up by the insets, which is the sum of the |
| // left and right insets. |
| constexpr int width() const { return left_ + right_; } |
| |
| // Returns the total height taken up by the insets, which is the sum of the |
| // top and bottom insets. |
| constexpr int height() const { return top_ + bottom_; } |
| |
| // Returns true if the insets are empty. |
| bool IsEmpty() const { return width() == 0 && height() == 0; } |
| |
| void Set(int top, int left, int bottom, int right) { |
| top_ = top; |
| left_ = left; |
| bottom_ = bottom; |
| right_ = right; |
| } |
| |
| bool operator==(const Insets& insets) const { |
| return top_ == insets.top_ && left_ == insets.left_ && |
| bottom_ == insets.bottom_ && right_ == insets.right_; |
| } |
| |
| bool operator!=(const Insets& insets) const { |
| return !(*this == insets); |
| } |
| |
| void operator+=(const Insets& insets) { |
| top_ += insets.top_; |
| left_ += insets.left_; |
| bottom_ += insets.bottom_; |
| right_ += insets.right_; |
| } |
| |
| void operator-=(const Insets& insets) { |
| top_ -= insets.top_; |
| left_ -= insets.left_; |
| bottom_ -= insets.bottom_; |
| right_ -= insets.right_; |
| } |
| |
| Insets operator-() const { |
| return Insets(-top_, -left_, -bottom_, -right_); |
| } |
| |
| Insets Scale(float scale) const { |
| return Scale(scale, scale); |
| } |
| |
| Insets Scale(float x_scale, float y_scale) const { |
| return Insets(static_cast<int>(top() * y_scale), |
| static_cast<int>(left() * x_scale), |
| static_cast<int>(bottom() * y_scale), |
| static_cast<int>(right() * x_scale)); |
| } |
| |
| // Adjusts the vertical and horizontal dimensions by the values described in |
| // |vector|. Offsetting insets before applying to a rectangle would be |
| // equivalent to offseting the rectangle then applying the insets. |
| Insets Offset(const gfx::Vector2d& vector) const; |
| |
| operator InsetsF() const { |
| return InsetsF(static_cast<float>(top()), static_cast<float>(left()), |
| static_cast<float>(bottom()), static_cast<float>(right())); |
| } |
| |
| // Returns a string representation of the insets. |
| std::string ToString() const; |
| |
| private: |
| int top_; |
| int left_; |
| int bottom_; |
| int right_; |
| }; |
| |
| inline Insets operator+(Insets lhs, const Insets& rhs) { |
| lhs += rhs; |
| return lhs; |
| } |
| |
| inline Insets operator-(Insets lhs, const Insets& rhs) { |
| lhs -= rhs; |
| return lhs; |
| } |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_GEOMETRY_INSETS_H_ |