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 | |
30 | namespace WebCore { |
31 | |
32 | class Element; |
33 | class RenderStyle; |
34 | |
35 | namespace Style { |
36 | |
37 | class Update; |
38 | |
39 | struct 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 | |
73 | using Relations = Vector<Relation, 8>; |
74 | |
75 | std::unique_ptr<Relations> commitRelationsToRenderStyle(RenderStyle&, const Element&, const Relations&); |
76 | void commitRelations(std::unique_ptr<Relations>, Update&); |
77 | |
78 | } |
79 | } |
80 | |