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
|
/*
* 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) 2005-2019 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.
* Copyright (C) 2012 Google Inc. 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.
*/
#include "config.h"
#include "RuleData.h"
#include "CSSFontSelector.h"
#include "CSSKeyframesRule.h"
#include "CSSSelector.h"
#include "CSSSelectorList.h"
#include "CommonAtomStrings.h"
#include "HTMLNames.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include "SelectorChecker.h"
#include "SelectorFilter.h"
#include "StyleResolver.h"
#include "StyleRule.h"
#include "StyleRuleImport.h"
#include "StyleSheetContents.h"
#include "UserAgentParts.h"
namespace WebCore {
namespace Style {
using namespace HTMLNames;
struct SameSizeAsRuleData {
uint64_t a;
unsigned b;
unsigned c;
unsigned d[4];
};
static_assert(sizeof(RuleData) == sizeof(SameSizeAsRuleData), "RuleData should stay small");
static inline MatchBasedOnRuleHash computeMatchBasedOnRuleHash(const CSSSelector& selector)
{
if (selector.precedingInComplexSelector())
return MatchBasedOnRuleHash::None;
if (selector.match() == CSSSelector::Match::Tag) {
const QualifiedName& tagQualifiedName = selector.tagQName();
const AtomString& selectorNamespace = tagQualifiedName.namespaceURI();
if (selectorNamespace == starAtom() || selectorNamespace == xhtmlNamespaceURI) {
if (tagQualifiedName == anyQName())
return MatchBasedOnRuleHash::Universal;
return MatchBasedOnRuleHash::ClassC;
}
return MatchBasedOnRuleHash::None;
}
if (SelectorChecker::isCommonPseudoClassSelector(&selector))
return MatchBasedOnRuleHash::ClassB;
if (selector.match() == CSSSelector::Match::Id)
return MatchBasedOnRuleHash::ClassA;
if (selector.match() == CSSSelector::Match::Class)
return MatchBasedOnRuleHash::ClassB;
// FIXME: Valueless [attribute] case can be handled here too.
return MatchBasedOnRuleHash::None;
}
static inline PropertyAllowlist determinePropertyAllowlist(const CSSSelector* selector)
{
for (const CSSSelector* component = selector; component; component = component->precedingInComplexSelector()) {
#if ENABLE(VIDEO)
// Property allow-list for `::cue`:
if (component->match() == CSSSelector::Match::PseudoElement && component->pseudoElement() == CSSSelector::PseudoElement::UserAgentPart && component->value() == UserAgentParts::cue())
return PropertyAllowlist::Cue;
// Property allow-list for `::cue(selector)`:
if (component->match() == CSSSelector::Match::PseudoElement && component->pseudoElement() == CSSSelector::PseudoElement::Cue)
return PropertyAllowlist::CueSelector;
// Property allow-list for '::-internal-cue-background':
if (component->match() == CSSSelector::Match::PseudoElement && component->pseudoElement() == CSSSelector::PseudoElement::UserAgentPart && component->value() == UserAgentParts::internalCueBackground())
return PropertyAllowlist::CueBackground;
#endif
if (component->match() == CSSSelector::Match::PseudoElement && component->pseudoElement() == CSSSelector::PseudoElement::Marker)
return propertyAllowlistForPseudoElement(PseudoElementType::Marker);
if (const auto* selectorList = selector->selectorList()) {
for (auto& subSelector : *selectorList) {
auto allowlistType = determinePropertyAllowlist(&subSelector);
if (allowlistType != PropertyAllowlist::None)
return allowlistType;
}
}
}
return PropertyAllowlist::None;
}
RuleData::RuleData(const StyleRule& styleRule, unsigned selectorIndex, unsigned selectorListIndex, unsigned position, OptionSet<UsedRuleType> usedRuleTypes)
: m_styleRuleWithSelectorIndex(&styleRule, static_cast<uint16_t>(selectorIndex))
, m_selectorListIndex(selectorListIndex)
, m_matchBasedOnRuleHash(enumToUnderlyingType(computeMatchBasedOnRuleHash(*selector())))
, m_canMatchPseudoElement(complexSelectorCanMatchPseudoElement(*selector()))
, m_propertyAllowlist(enumToUnderlyingType(determinePropertyAllowlist(selector())))
, m_usedRuleTypes(usedRuleTypes.toRaw())
, m_isEnabled(true)
, m_position(position)
, m_descendantSelectorIdentifierHashes(SelectorFilter::collectHashes(*selector()))
{
ASSERT(m_position == position);
ASSERT(this->selectorIndex() == selectorIndex);
}
} // namespace Style
} // namespace WebCore
|
