1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
* All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
* (http://www.torchmobile.com/)
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef SelectorChecker_h
#define SelectorChecker_h
#include "core/css/CSSSelector.h"
#include "core/dom/Element.h"
#include "platform/scroll/ScrollTypes.h"
namespace blink {
class CSSSelector;
class ContainerNode;
class Element;
class LayoutScrollbar;
class ComputedStyle;
class SelectorChecker {
WTF_MAKE_NONCOPYABLE(SelectorChecker);
STACK_ALLOCATED();
public:
enum VisitedMatchType { VisitedMatchDisabled, VisitedMatchEnabled };
enum Mode {
ResolvingStyle,
CollectingStyleRules,
CollectingCSSRules,
QueryingRules,
SharingRules
};
struct Init {
STACK_ALLOCATED();
public:
Mode mode = ResolvingStyle;
bool isUARule = false;
bool isQuerySelector = false;
ComputedStyle* elementStyle = nullptr;
Member<LayoutScrollbar> scrollbar = nullptr;
ScrollbarPart scrollbarPart = NoPart;
};
explicit SelectorChecker(const Init& init)
: m_mode(init.mode),
m_isUARule(init.isUARule),
m_isQuerySelector(init.isQuerySelector),
m_elementStyle(init.elementStyle),
m_scrollbar(init.scrollbar),
m_scrollbarPart(init.scrollbarPart) {}
struct SelectorCheckingContext {
STACK_ALLOCATED();
public:
// Initial selector constructor
SelectorCheckingContext(Element* element, VisitedMatchType visitedMatchType)
: selector(nullptr),
element(element),
previousElement(nullptr),
scope(nullptr),
visitedMatchType(visitedMatchType),
pseudoId(PseudoIdNone),
isSubSelector(false),
inRightmostCompound(true),
hasScrollbarPseudo(false),
hasSelectionPseudo(false),
treatShadowHostAsNormalScope(false) {}
const CSSSelector* selector;
Member<Element> element;
Member<Element> previousElement;
Member<const ContainerNode> scope;
VisitedMatchType visitedMatchType;
PseudoId pseudoId;
bool isSubSelector;
bool inRightmostCompound;
bool hasScrollbarPseudo;
bool hasSelectionPseudo;
bool treatShadowHostAsNormalScope;
};
struct MatchResult {
STACK_ALLOCATED();
MatchResult() : dynamicPseudo(PseudoIdNone), specificity(0) {}
PseudoId dynamicPseudo;
unsigned specificity;
};
bool match(const SelectorCheckingContext& context,
MatchResult& result) const {
ASSERT(context.selector);
return matchSelector(context, result) == SelectorMatches;
}
bool match(const SelectorCheckingContext& context) const {
MatchResult ignoreResult;
return match(context, ignoreResult);
}
static bool matchesFocusPseudoClass(const Element&);
private:
bool checkOne(const SelectorCheckingContext&, MatchResult&) const;
enum MatchStatus {
SelectorMatches,
SelectorFailsLocally,
SelectorFailsAllSiblings,
SelectorFailsCompletely
};
MatchStatus matchSelector(const SelectorCheckingContext&, MatchResult&) const;
MatchStatus matchForSubSelector(const SelectorCheckingContext&,
MatchResult&) const;
MatchStatus matchForRelation(const SelectorCheckingContext&,
MatchResult&) const;
MatchStatus matchForPseudoContent(const SelectorCheckingContext&,
const Element&,
MatchResult&) const;
MatchStatus matchForPseudoShadow(const SelectorCheckingContext&,
const ContainerNode*,
MatchResult&) const;
bool checkPseudoClass(const SelectorCheckingContext&, MatchResult&) const;
bool checkPseudoElement(const SelectorCheckingContext&, MatchResult&) const;
bool checkScrollbarPseudoClass(const SelectorCheckingContext&,
MatchResult&) const;
bool checkPseudoHost(const SelectorCheckingContext&, MatchResult&) const;
bool checkPseudoNot(const SelectorCheckingContext&, MatchResult&) const;
Mode m_mode;
bool m_isUARule;
bool m_isQuerySelector;
ComputedStyle* m_elementStyle;
Member<LayoutScrollbar> m_scrollbar;
ScrollbarPart m_scrollbarPart;
};
} // namespace blink
#endif
|
