1 /* 2 * Copyright (c) 2012, Google Inc. 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef LayoutSize_h 32 #define LayoutSize_h 33 34 #include "core/platform/LayoutUnit.h" 35 #include "core/platform/graphics/FloatSize.h" 36 #include "core/platform/graphics/IntSize.h" 37 38 namespace WebCore { 39 40 class LayoutPoint; 41 42 class LayoutSize { 43 public: 44 LayoutSize() : m_width(0), m_height(0) { } 45 LayoutSize(const IntSize& size) : m_width(size.width()), m_height(size.height()) { } 46 LayoutSize(LayoutUnit width, LayoutUnit height) : m_width(width), m_height(height) { } 47 48 explicit LayoutSize(const FloatSize& size) : m_width(size.width()), m_height(size.height()) { } 49 50 LayoutUnit width() const { return m_width; } 51 LayoutUnit height() const { return m_height; } 52 53 void setWidth(LayoutUnit width) { m_width = width; } 54 void setHeight(LayoutUnit height) { m_height = height; } 55 56 bool isEmpty() const { return m_width <= 0 || m_height <= 0; } 57 bool isZero() const { return !m_width && !m_height; } 58 59 float aspectRatio() const { return static_cast<float>(m_width) / static_cast<float>(m_height); } 60 61 void expand(LayoutUnit width, LayoutUnit height) 62 { 63 m_width += width; 64 m_height += height; 65 } 66 67 void shrink(LayoutUnit width, LayoutUnit height) 68 { 69 m_width -= width; 70 m_height -= height; 71 } 72 73 void scale(float scale) 74 { 75 m_width *= scale; 76 m_height *= scale; 77 } 78 79 void scale(float widthScale, float heightScale) 80 { 81 m_width *= widthScale; 82 m_height *= heightScale; 83 } 84 85 LayoutSize expandedTo(const LayoutSize& other) const 86 { 87 return LayoutSize(m_width > other.m_width ? m_width : other.m_width, 88 m_height > other.m_height ? m_height : other.m_height); 89 } 90 91 LayoutSize shrunkTo(const LayoutSize& other) const 92 { 93 return LayoutSize(m_width < other.m_width ? m_width : other.m_width, 94 m_height < other.m_height ? m_height : other.m_height); 95 } 96 97 void clampNegativeToZero() 98 { 99 *this = expandedTo(LayoutSize()); 100 } 101 102 void clampToMinimumSize(const LayoutSize& minimumSize) 103 { 104 if (m_width < minimumSize.width()) 105 m_width = minimumSize.width(); 106 if (m_height < minimumSize.height()) 107 m_height = minimumSize.height(); 108 } 109 110 LayoutSize transposedSize() const 111 { 112 return LayoutSize(m_height, m_width); 113 } 114 115 private: 116 LayoutUnit m_width, m_height; 117 }; 118 119 inline LayoutSize& operator+=(LayoutSize& a, const LayoutSize& b) 120 { 121 a.setWidth(a.width() + b.width()); 122 a.setHeight(a.height() + b.height()); 123 return a; 124 } 125 126 inline LayoutSize& operator-=(LayoutSize& a, const LayoutSize& b) 127 { 128 a.setWidth(a.width() - b.width()); 129 a.setHeight(a.height() - b.height()); 130 return a; 131 } 132 133 inline LayoutSize operator+(const LayoutSize& a, const LayoutSize& b) 134 { 135 return LayoutSize(a.width() + b.width(), a.height() + b.height()); 136 } 137 138 inline LayoutSize operator-(const LayoutSize& a, const LayoutSize& b) 139 { 140 return LayoutSize(a.width() - b.width(), a.height() - b.height()); 141 } 142 143 inline LayoutSize operator-(const LayoutSize& size) 144 { 145 return LayoutSize(-size.width(), -size.height()); 146 } 147 148 inline bool operator==(const LayoutSize& a, const LayoutSize& b) 149 { 150 return a.width() == b.width() && a.height() == b.height(); 151 } 152 153 inline bool operator!=(const LayoutSize& a, const LayoutSize& b) 154 { 155 return a.width() != b.width() || a.height() != b.height(); 156 } 157 158 inline IntSize flooredIntSize(const LayoutSize& s) 159 { 160 return IntSize(s.width().floor(), s.height().floor()); 161 } 162 163 inline IntSize roundedIntSize(const LayoutSize& s) 164 { 165 return IntSize(s.width().round(), s.height().round()); 166 } 167 168 inline LayoutSize roundedLayoutSize(const FloatSize& s) 169 { 170 return LayoutSize(s); 171 } 172 173 } // namespace WebCore 174 175 #endif // LayoutSize_h 176
