1 // Copyright 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_GFX_GEOMETRY_INSETS_BASE_H_ 6 #define UI_GFX_GEOMETRY_INSETS_BASE_H_ 7 8 #include "ui/gfx/gfx_export.h" 9 10 namespace gfx { 11 12 // An insets represents the borders of a container (the space the container must 13 // leave at each of its edges). 14 template<typename Class, typename Type> 15 class GFX_EXPORT InsetsBase { 16 public: 17 Type top() const { return top_; } 18 Type left() const { return left_; } 19 Type bottom() const { return bottom_; } 20 Type right() const { return right_; } 21 22 // Returns the total width taken up by the insets, which is the sum of the 23 // left and right insets. 24 Type width() const { return left_ + right_; } 25 26 // Returns the total height taken up by the insets, which is the sum of the 27 // top and bottom insets. 28 Type height() const { return top_ + bottom_; } 29 30 // Returns true if the insets are empty. 31 bool empty() const { return width() == 0 && height() == 0; } 32 33 void Set(Type top, Type left, Type bottom, Type right) { 34 top_ = top; 35 left_ = left; 36 bottom_ = bottom; 37 right_ = right; 38 } 39 40 bool operator==(const Class& insets) const { 41 return top_ == insets.top_ && left_ == insets.left_ && 42 bottom_ == insets.bottom_ && right_ == insets.right_; 43 } 44 45 bool operator!=(const Class& insets) const { 46 return !(*this == insets); 47 } 48 49 void operator+=(const Class& insets) { 50 top_ += insets.top_; 51 left_ += insets.left_; 52 bottom_ += insets.bottom_; 53 right_ += insets.right_; 54 } 55 56 Class operator-() const { 57 return Class(-top_, -left_, -bottom_, -right_); 58 } 59 60 protected: 61 InsetsBase(Type top, Type left, Type bottom, Type right) 62 : top_(top), 63 left_(left), 64 bottom_(bottom), 65 right_(right) {} 66 67 // Destructor is intentionally made non virtual and protected. 68 // Do not make this public. 69 ~InsetsBase() {} 70 71 private: 72 Type top_; 73 Type left_; 74 Type bottom_; 75 Type right_; 76 }; 77 78 } // namespace gfx 79 80 #endif // UI_GFX_GEOMETRY_INSETS_BASE_H_ 81
