1/*
2 * Copyright (C) 2016 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Forward.h>
29
30namespace WebCore {
31
32class Element;
33class RenderStyle;
34
35namespace Style {
36
37class Update;
38
39struct Relation {
40 enum Type {
41 AffectedByActive,
42 AffectedByDrag,
43 AffectedByEmpty,
44 AffectedByFocusWithin,
45 AffectedByHover,
46 AffectedByPreviousSibling,
47 DescendantsAffectedByPreviousSibling,
48 // For AffectsNextSibling 'value' tells how many element siblings to mark starting with 'element'.
49 AffectsNextSibling,
50 ChildrenAffectedByForwardPositionalRules,
51 DescendantsAffectedByForwardPositionalRules,
52 ChildrenAffectedByBackwardPositionalRules,
53 DescendantsAffectedByBackwardPositionalRules,
54 ChildrenAffectedByFirstChildRules,
55 ChildrenAffectedByPropertyBasedBackwardPositionalRules,
56 ChildrenAffectedByLastChildRules,
57 FirstChild,
58 LastChild,
59 NthChildIndex,
60 Unique,
61 };
62 const Element* element;
63 Type type;
64 unsigned value;
65
66 Relation(const Element& element, Type type, unsigned value = 1)
67 : element(&element)
68 , type(type)
69 , value(value)
70 { }
71};
72
73using Relations = Vector<Relation, 8>;
74
75std::unique_ptr<Relations> commitRelationsToRenderStyle(RenderStyle&, const Element&, const Relations&);
76void commitRelations(std::unique_ptr<Relations>, Update&);
77
78}
79}
80