1 /* 2 * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above 9 * copyright notice, this list of conditions and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following 13 * disclaimer in the documentation and/or other materials 14 * provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef FloatBoxExtent_h 31 #define FloatBoxExtent_h 32 33 #include "platform/geometry/FloatRect.h" 34 35 namespace WebCore { 36 37 class FloatBoxExtent { 38 public: FloatBoxExtent()39 FloatBoxExtent() 40 : m_top(0) 41 , m_right(0) 42 , m_bottom(0) 43 , m_left(0) 44 { 45 } 46 FloatBoxExtent(float top,float right,float bottom,float left)47 FloatBoxExtent(float top, float right, float bottom, float left) 48 : m_top(top) 49 , m_right(right) 50 , m_bottom(bottom) 51 , m_left(left) 52 { 53 } 54 top()55 float top() const { return m_top; } setTop(float top)56 void setTop(float top) { m_top = top; } 57 right()58 float right() const { return m_right; } setRight(float right)59 void setRight(float right) { m_right = right; } 60 bottom()61 float bottom() const { return m_bottom; } setBottom(float bottom)62 void setBottom(float bottom) { m_bottom = bottom; } 63 left()64 float left() const { return m_left; } setLeft(float left)65 void setLeft(float left) { m_left = left; } 66 isZero()67 bool isZero() const { return !left() && !right() && !top() && !bottom(); } 68 expandRect(FloatRect & rect)69 void expandRect(FloatRect& rect) const 70 { 71 if (isZero()) 72 return; 73 74 rect.move(-left(), -top()); 75 rect.expand(left() + right(), top() + bottom()); 76 } 77 unite(const FloatBoxExtent & other)78 void unite(const FloatBoxExtent& other) 79 { 80 m_top = std::min(m_top, other.top()); 81 m_right = std::max(m_right, other.right()); 82 m_bottom = std::max(m_bottom, other.bottom()); 83 m_left = std::min(m_left, other.left()); 84 } 85 unite(const FloatRect & rect)86 void unite(const FloatRect& rect) 87 { 88 m_top = std::min(m_top, rect.y()); 89 m_right = std::max(m_right, rect.maxX()); 90 m_bottom = std::max(m_bottom, rect.maxY()); 91 m_left = std::min(m_left, rect.x()); 92 } 93 94 private: 95 float m_top; 96 float m_right; 97 float m_bottom; 98 float m_left; 99 }; 100 101 inline bool operator==(const FloatBoxExtent& a, const FloatBoxExtent& b) 102 { 103 return a.top() == b.top() 104 && a.right() == b.right() 105 && a.bottom() == b.bottom() 106 && a.left() == b.left(); 107 } 108 109 inline bool operator!=(const FloatBoxExtent& a, const FloatBoxExtent& b) 110 { 111 return !(a == b); 112 } 113 114 inline void operator+=(FloatBoxExtent& a, const FloatBoxExtent& b) 115 { 116 a.setTop(a.top() + b.top()); 117 a.setRight(a.right() + b.right()); 118 a.setBottom(a.bottom() + b.bottom()); 119 a.setLeft(a.left() + b.left()); 120 } 121 122 } // namespace WebCore 123 124 125 #endif // FloatBoxExtent_h 126