1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 * Copyright (C) 2013-2017 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#pragma once
33
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38enum GridPositionType {
39 AutoPosition,
40 ExplicitPosition, // [ <integer> || <string> ]
41 SpanPosition, // span && [ <integer> || <string> ]
42 NamedGridAreaPosition // <ident>
43};
44
45enum GridPositionSide {
46 ColumnStartSide,
47 ColumnEndSide,
48 RowStartSide,
49 RowEndSide
50};
51
52class GridPosition {
53public:
54 GridPosition()
55 : m_type(AutoPosition)
56 , m_integerPosition(0)
57 {
58 }
59
60 bool isPositive() const { return integerPosition() > 0; }
61
62 GridPositionType type() const { return m_type; }
63 bool isAuto() const { return m_type == AutoPosition; }
64 bool isSpan() const { return m_type == SpanPosition; }
65 bool isNamedGridArea() const { return m_type == NamedGridAreaPosition; }
66
67 WEBCORE_EXPORT void setExplicitPosition(int position, const String& namedGridLine);
68 void setAutoPosition();
69 WEBCORE_EXPORT void setSpanPosition(int position, const String& namedGridLine);
70 void setNamedGridArea(const String&);
71
72 WEBCORE_EXPORT int integerPosition() const;
73 String namedGridLine() const;
74 WEBCORE_EXPORT int spanPosition() const;
75
76 bool operator==(const GridPosition& other) const;
77
78 bool shouldBeResolvedAgainstOppositePosition() const { return isAuto() || isSpan(); }
79
80 // Note that grid line 1 is internally represented by the index 0, that's why the max value for
81 // a position is kGridMaxTracks instead of kGridMaxTracks + 1.
82 static int max();
83 static int min();
84
85 WEBCORE_EXPORT static void setMaxPositionForTesting(unsigned);
86
87private:
88 static Optional<int> gMaxPositionForTesting;
89
90 void setIntegerPosition(int integerPosition) { m_integerPosition = clampTo(integerPosition, min(), max()); }
91
92 GridPositionType m_type;
93 int m_integerPosition;
94 String m_namedGridLine;
95};
96
97} // namespace WebCore
98