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31 #ifndef GridPosition_h
32 #define GridPosition_h
34 #include "wtf/text/WTFString.h"
38 enum GridPositionType {
40 ExplicitPosition, // [ <integer> || <string> ]
41 SpanPosition, // span && [ <integer> || <string> ]
42 NamedGridAreaPosition // <ident>
45 enum GridPositionSide {
55 : m_type(AutoPosition)
56 , m_integerPosition(0)
60 static size_t adjustGridPositionForAfterEndSide(size_t resolvedPosition)
62 return resolvedPosition ? resolvedPosition - 1 : 0;
65 static size_t adjustGridPositionForSide(size_t resolvedPosition, GridPositionSide side)
67 // An item finishing on the N-th line belongs to the N-1-th cell.
68 if (side == ColumnEndSide || side == RowEndSide)
69 return adjustGridPositionForAfterEndSide(resolvedPosition);
71 return resolvedPosition;
74 bool isPositive() const { return integerPosition() > 0; }
76 GridPositionType type() const { return m_type; }
77 bool isAuto() const { return m_type == AutoPosition; }
78 bool isSpan() const { return m_type == SpanPosition; }
79 bool isNamedGridArea() const { return m_type == NamedGridAreaPosition; }
81 void setExplicitPosition(int position, const String& namedGridLine)
83 m_type = ExplicitPosition;
84 m_integerPosition = position;
85 m_namedGridLine = namedGridLine;
88 // 'span' values cannot be negative, yet we reuse the <integer> position which can
89 // be. This means that we have to convert the span position to an integer, losing
90 // some precision here. It shouldn't be an issue in practice though.
91 void setSpanPosition(int position, const String& namedGridLine)
93 m_type = SpanPosition;
94 m_integerPosition = position;
95 m_namedGridLine = namedGridLine;
98 void setNamedGridArea(const String& namedGridArea)
100 m_type = NamedGridAreaPosition;
101 m_namedGridLine = namedGridArea;
104 int integerPosition() const
106 ASSERT(type() == ExplicitPosition);
107 return m_integerPosition;
110 String namedGridLine() const
112 ASSERT(type() == ExplicitPosition || type() == SpanPosition || type() == NamedGridAreaPosition);
113 return m_namedGridLine;
116 int spanPosition() const
118 ASSERT(type() == SpanPosition);
119 return m_integerPosition;
122 bool operator==(const GridPosition& other) const
124 return m_type == other.m_type && m_integerPosition == other.m_integerPosition && m_namedGridLine == other.m_namedGridLine;
127 bool shouldBeResolvedAgainstOppositePosition() const
129 return isAuto() || isSpan();
132 GridPositionType m_type;
133 int m_integerPosition;
134 String m_namedGridLine;
137 } // namespace WebCore
139 #endif // GridPosition_h