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 | |
36 | namespace WebCore { |
37 | |
38 | enum GridPositionType { |
39 | AutoPosition, |
40 | ExplicitPosition, // [ <integer> || <string> ] |
41 | SpanPosition, // span && [ <integer> || <string> ] |
42 | NamedGridAreaPosition // <ident> |
43 | }; |
44 | |
45 | enum GridPositionSide { |
46 | ColumnStartSide, |
47 | ColumnEndSide, |
48 | RowStartSide, |
49 | RowEndSide |
50 | }; |
51 | |
52 | class GridPosition { |
53 | public: |
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 | |
87 | private: |
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 | |