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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef GridResolvedPosition_h | |
6 #define GridResolvedPosition_h | |
7 | |
8 #include "core/rendering/style/GridPosition.h" | |
9 | |
10 namespace WebCore { | |
11 | |
12 class GridSpan; | |
13 class RenderBox; | |
14 class RenderStyle; | |
15 | |
16 enum GridPositionSide { | |
17 ColumnStartSide, | |
18 ColumnEndSide, | |
19 RowStartSide, | |
20 RowEndSide | |
21 }; | |
22 | |
23 enum GridTrackSizingDirection { | |
24 ForColumns, | |
25 ForRows | |
26 }; | |
27 | |
28 // This class represents an index into one of the dimensions of the grid array. | |
29 // Wraps a size_t integer just for the purpose of knowing what we manipulate in the grid code. | |
30 class GridResolvedPosition { | |
31 public: | |
32 static size_t adjustGridPositionForAfterEndSide(size_t resolvedPosition) | |
33 { | |
34 return resolvedPosition ? resolvedPosition - 1 : 0; | |
35 } | |
36 | |
37 static size_t adjustGridPositionForSide(size_t resolvedPosition, GridPositio nSide side) | |
38 { | |
39 // An item finishing on the N-th line belongs to the N-1-th cell. | |
40 if (side == ColumnEndSide || side == RowEndSide) | |
41 return adjustGridPositionForAfterEndSide(resolvedPosition); | |
42 | |
43 return resolvedPosition; | |
44 } | |
45 | |
46 static GridSpan resolveGridPositionsFromAutoPlacementPosition(const RenderBo x&, GridTrackSizingDirection, const GridResolvedPosition&); | |
47 static PassOwnPtr<GridSpan> resolveGridPositionsFromStyle(const RenderStyle& , const RenderBox&, GridTrackSizingDirection); | |
48 static GridResolvedPosition resolveNamedGridLinePositionFromStyle(const Rend erStyle&, const GridPosition&, GridPositionSide); | |
49 static GridResolvedPosition resolveGridPositionFromStyle(const RenderStyle&, const GridPosition&, GridPositionSide); | |
50 static PassOwnPtr<GridSpan> resolveGridPositionAgainstOppositePosition(const RenderStyle&, const GridResolvedPosition& resolvedOppositePosition, const GridP osition&, GridPositionSide); | |
51 static PassOwnPtr<GridSpan> resolveNamedGridLinePositionAgainstOppositePosit ion(const RenderStyle&, const GridResolvedPosition& resolvedOppositePosition, co nst GridPosition&, GridPositionSide); | |
52 | |
53 GridResolvedPosition(size_t position) | |
54 : m_integerPosition(position) | |
55 { | |
56 } | |
57 | |
58 GridResolvedPosition(const GridPosition& position, GridPositionSide side) | |
59 { | |
60 ASSERT(position.integerPosition()); | |
61 size_t integerPosition = position.integerPosition() - 1; | |
62 | |
63 m_integerPosition = adjustGridPositionForSide(integerPosition, side); | |
64 } | |
65 | |
66 GridResolvedPosition& operator++() | |
67 { | |
68 m_integerPosition++; | |
69 return *this; | |
70 } | |
71 | |
72 bool operator==(const GridResolvedPosition& other) const | |
73 { | |
74 return m_integerPosition == other.m_integerPosition; | |
75 } | |
76 | |
77 bool operator<(const GridResolvedPosition& other) const | |
78 { | |
79 return m_integerPosition < other.m_integerPosition; | |
80 } | |
81 | |
82 bool operator<=(const GridResolvedPosition& other) const | |
83 { | |
84 return m_integerPosition <= other.m_integerPosition; | |
85 } | |
86 | |
87 bool operator<(size_t otherIntegerPosition) const | |
88 { | |
89 return m_integerPosition < otherIntegerPosition; | |
90 } | |
91 | |
92 bool operator<=(size_t otherIntegerPosition) const | |
93 { | |
94 return m_integerPosition <= otherIntegerPosition; | |
95 } | |
96 | |
97 operator size_t() const | |
esprehn
2014/04/08 22:14:58
Doesn't having this operator just defeat the bug f
| |
98 { | |
99 return m_integerPosition; | |
100 } | |
101 | |
102 static size_t explicitGridColumnCount(const RenderStyle&); | |
103 static size_t explicitGridRowCount(const RenderStyle&); | |
104 | |
105 private: | |
106 | |
107 static size_t explicitGridSizeForSide(const RenderStyle&, GridPositionSide); | |
108 | |
109 size_t m_integerPosition; | |
110 }; | |
111 | |
112 } // namespace WebCore | |
113 | |
114 #endif // GridResolvedPosition_h | |
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