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 "platform/LayoutUnit.h" 35 #include "platform/geometry/FloatSize.h" 36 #include "platform/geometry/IntSize.h" 37 38 namespace WebCore { 39 40 class LayoutPoint; 41 42 enum AspectRatioFit { 43 AspectRatioFitShrink, 44 AspectRatioFitGrow 45 }; 46 47 class LayoutSize { 48 public: 49 LayoutSize() { } 50 LayoutSize(const IntSize& size) : m_width(size.width()), m_height(size.height()) { } 51 LayoutSize(LayoutUnit width, LayoutUnit height) : m_width(width), m_height(height) { } 52 53 explicit LayoutSize(const FloatSize& size) : m_width(size.width()), m_height(size.height()) { } 54 55 LayoutUnit width() const { return m_width; } 56 LayoutUnit height() const { return m_height; } 57 58 void setWidth(LayoutUnit width) { m_width = width; } 59 void setHeight(LayoutUnit height) { m_height = height; } 60 61 bool isEmpty() const { return m_width.rawValue() <= 0 || m_height.rawValue() <= 0; } 62 bool isZero() const { return !m_width && !m_height; } 63 64 float aspectRatio() const { return static_cast<float>(m_width) / static_cast<float>(m_height); } 65 66 void expand(LayoutUnit width, LayoutUnit height) 67 { 68 m_width += width; 69 m_height += height; 70 } 71 72 void shrink(LayoutUnit width, LayoutUnit height) 73 { 74 m_width -= width; 75 m_height -= height; 76 } 77 78 void scale(float scale) 79 { 80 m_width *= scale; 81 m_height *= scale; 82 } 83 84 void scale(float widthScale, float heightScale) 85 { 86 m_width *= widthScale; 87 m_height *= heightScale; 88 } 89 90 LayoutSize expandedTo(const LayoutSize& other) const 91 { 92 return LayoutSize(m_width > other.m_width ? m_width : other.m_width, 93 m_height > other.m_height ? m_height : other.m_height); 94 } 95 96 LayoutSize shrunkTo(const LayoutSize& other) const 97 { 98 return LayoutSize(m_width < other.m_width ? m_width : other.m_width, 99 m_height < other.m_height ? m_height : other.m_height); 100 } 101 102 void clampNegativeToZero() 103 { 104 *this = expandedTo(LayoutSize()); 105 } 106 107 void clampToMinimumSize(const LayoutSize& minimumSize) 108 { 109 if (m_width < minimumSize.width()) 110 m_width = minimumSize.width(); 111 if (m_height < minimumSize.height()) 112 m_height = minimumSize.height(); 113 } 114 115 LayoutSize transposedSize() const 116 { 117 return LayoutSize(m_height, m_width); 118 } 119 120 LayoutSize fitToAspectRatio(const LayoutSize& aspectRatio, AspectRatioFit fit) const 121 { 122 float heightScale = height().toFloat() / aspectRatio.height().toFloat(); 123 float widthScale = width().toFloat() / aspectRatio.width().toFloat(); 124 if ((widthScale > heightScale) != (fit == AspectRatioFitGrow)) 125 return LayoutSize(height() * aspectRatio.width() / aspectRatio.height(), height()); 126 return LayoutSize(width(), width() * aspectRatio.height() / aspectRatio.width()); 127 } 128 129 private: 130 LayoutUnit m_width, m_height; 131 }; 132 133 inline LayoutSize& operator+=(LayoutSize& a, const LayoutSize& b) 134 { 135 a.setWidth(a.width() + b.width()); 136 a.setHeight(a.height() + b.height()); 137 return a; 138 } 139 140 inline LayoutSize& operator-=(LayoutSize& a, const LayoutSize& b) 141 { 142 a.setWidth(a.width() - b.width()); 143 a.setHeight(a.height() - b.height()); 144 return a; 145 } 146 147 inline LayoutSize operator+(const LayoutSize& a, const LayoutSize& b) 148 { 149 return LayoutSize(a.width() + b.width(), a.height() + b.height()); 150 } 151 152 inline LayoutSize operator-(const LayoutSize& a, const LayoutSize& b) 153 { 154 return LayoutSize(a.width() - b.width(), a.height() - b.height()); 155 } 156 157 inline LayoutSize operator-(const LayoutSize& size) 158 { 159 return LayoutSize(-size.width(), -size.height()); 160 } 161 162 inline bool operator==(const LayoutSize& a, const LayoutSize& b) 163 { 164 return a.width() == b.width() && a.height() == b.height(); 165 } 166 167 inline bool operator!=(const LayoutSize& a, const LayoutSize& b) 168 { 169 return a.width() != b.width() || a.height() != b.height(); 170 } 171 172 inline IntSize flooredIntSize(const LayoutSize& s) 173 { 174 return IntSize(s.width().floor(), s.height().floor()); 175 } 176 177 inline IntSize roundedIntSize(const LayoutSize& s) 178 { 179 return IntSize(s.width().round(), s.height().round()); 180 } 181 182 inline LayoutSize roundedLayoutSize(const FloatSize& s) 183 { 184 return LayoutSize(s); 185 } 186 187 } // namespace WebCore 188 189 #endif // LayoutSize_h 190
