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 GridTrackSize_h 32 #define GridTrackSize_h 33 34 #include "core/rendering/style/GridLength.h" 35 36 namespace WebCore { 37 38 enum GridTrackSizeType { 39 LengthTrackSizing, 40 MinMaxTrackSizing 41 }; 42 43 class GridTrackSize { 44 public: GridTrackSize()45 GridTrackSize() 46 : m_type(LengthTrackSizing) 47 , m_minTrackBreadth(Undefined) 48 , m_maxTrackBreadth(Undefined) 49 , m_minTrackBreadthIsMinOrMaxContent(false) 50 , m_minTrackBreadthIsMaxContent(false) 51 , m_maxTrackBreadthIsMinOrMaxContent(false) 52 , m_maxTrackBreadthIsMaxContent(false) 53 { 54 // Someone has to set a valid lenght type through setLength or 55 // setMinMax before using the object. 56 } 57 GridTrackSize(LengthType type)58 GridTrackSize(LengthType type) 59 : m_type(LengthTrackSizing) 60 , m_minTrackBreadth(type) 61 , m_maxTrackBreadth(type) 62 , m_minTrackBreadthIsMinOrMaxContent(false) 63 , m_minTrackBreadthIsMaxContent(false) 64 , m_maxTrackBreadthIsMinOrMaxContent(false) 65 , m_maxTrackBreadthIsMaxContent(false) 66 { 67 ASSERT(type != Undefined); 68 69 cacheMinMaxTrackBreadthTypes(); 70 } 71 length()72 const GridLength& length() const 73 { 74 ASSERT(m_type == LengthTrackSizing); 75 ASSERT(m_minTrackBreadth == m_maxTrackBreadth); 76 const GridLength& minTrackBreadth = m_minTrackBreadth; 77 ASSERT(!minTrackBreadth.isLength() || !minTrackBreadth.length().isUndefined()); 78 return minTrackBreadth; 79 } 80 setLength(const GridLength & length)81 void setLength(const GridLength& length) 82 { 83 m_type = LengthTrackSizing; 84 m_minTrackBreadth = length; 85 m_maxTrackBreadth = length; 86 87 cacheMinMaxTrackBreadthTypes(); 88 } 89 minTrackBreadth()90 const GridLength& minTrackBreadth() const 91 { 92 ASSERT(!m_minTrackBreadth.isLength() || !m_minTrackBreadth.length().isUndefined()); 93 if (m_minTrackBreadth.isLength() && m_minTrackBreadth.length().isAuto()) { 94 DEFINE_STATIC_LOCAL(GridLength, minContent, (MinContent)); 95 return minContent; 96 } 97 return m_minTrackBreadth; 98 } 99 maxTrackBreadth()100 const GridLength& maxTrackBreadth() const 101 { 102 ASSERT(!m_maxTrackBreadth.isLength() || !m_maxTrackBreadth.length().isUndefined()); 103 if (m_maxTrackBreadth.isLength() && m_maxTrackBreadth.length().isAuto()) { 104 DEFINE_STATIC_LOCAL(GridLength, maxContent, (MaxContent)); 105 return maxContent; 106 } 107 return m_maxTrackBreadth; 108 } 109 setMinMax(const GridLength & minTrackBreadth,const GridLength & maxTrackBreadth)110 void setMinMax(const GridLength& minTrackBreadth, const GridLength& maxTrackBreadth) 111 { 112 m_type = MinMaxTrackSizing; 113 m_minTrackBreadth = minTrackBreadth; 114 m_maxTrackBreadth = maxTrackBreadth; 115 116 cacheMinMaxTrackBreadthTypes(); 117 } 118 type()119 GridTrackSizeType type() const { return m_type; } 120 isContentSized()121 bool isContentSized() const { return m_minTrackBreadth.isContentSized() || m_maxTrackBreadth.isContentSized(); } 122 123 bool operator==(const GridTrackSize& other) const 124 { 125 return m_type == other.m_type && m_minTrackBreadth == other.m_minTrackBreadth && m_maxTrackBreadth == other.m_maxTrackBreadth; 126 } 127 cacheMinMaxTrackBreadthTypes()128 void cacheMinMaxTrackBreadthTypes() 129 { 130 m_minTrackBreadthIsMaxContent = minTrackBreadth().isLength() && minTrackBreadth().length().isMaxContent(); 131 m_minTrackBreadthIsMinOrMaxContent = m_minTrackBreadthIsMaxContent || (minTrackBreadth().isLength() && minTrackBreadth().length().isMinContent()); 132 m_maxTrackBreadthIsMaxContent = maxTrackBreadth().isLength() && maxTrackBreadth().length().isMaxContent(); 133 m_maxTrackBreadthIsMinOrMaxContent = m_maxTrackBreadthIsMaxContent || (maxTrackBreadth().isLength() && maxTrackBreadth().length().isMinContent()); 134 } 135 hasMinOrMaxContentMinTrackBreadth()136 bool hasMinOrMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMinOrMaxContent; } hasMaxContentMinTrackBreadth()137 bool hasMaxContentMinTrackBreadth() const { return m_minTrackBreadthIsMaxContent; } hasMinOrMaxContentMaxTrackBreadth()138 bool hasMinOrMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMinOrMaxContent; } hasMaxContentMaxTrackBreadth()139 bool hasMaxContentMaxTrackBreadth() const { return m_maxTrackBreadthIsMaxContent; } 140 141 private: 142 GridTrackSizeType m_type; 143 GridLength m_minTrackBreadth; 144 GridLength m_maxTrackBreadth; 145 bool m_minTrackBreadthIsMinOrMaxContent; 146 bool m_minTrackBreadthIsMaxContent; 147 bool m_maxTrackBreadthIsMinOrMaxContent; 148 bool m_maxTrackBreadthIsMaxContent; 149 }; 150 151 } // namespace WebCore 152 153 #endif // GridTrackSize_h 154