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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2024 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include "CSSAtRuleID.h"
#include "CSSParser.h"
#include "CSSParserEnum.h"
#include "CSSParserTokenRange.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "StyleRule.h"
#include <memory>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class CSSParserObserver;
class CSSParserObserverWrapper;
class CSSSelectorList;
class CSSTokenizer;
class StyleRuleCounterStyle;
class StyleRuleKeyframe;
class StyleRule;
class StyleRuleBase;
class StyleRuleCharset;
class StyleRuleContainer;
class StyleRuleFontFace;
class StyleRuleFontFeatureValues;
class StyleRuleFontFeatureValuesBlock;
class StyleRuleFontPaletteValues;
class StyleRuleImport;
class StyleRuleKeyframes;
class StyleRuleLayer;
class StyleRuleMedia;
class StyleRuleNamespace;
class StyleRulePage;
class StyleRulePositionTry;
class StyleRuleSupports;
class StyleRuleViewport;
class StyleRuleViewTransition;
class StyleSheetContents;
class ImmutableStyleProperties;
class Element;
class MutableStyleProperties;
class CSSParserImpl {
WTF_MAKE_NONCOPYABLE(CSSParserImpl);
public:
CSSParserImpl(const CSSParserContext&, const String&, StyleSheetContents* = nullptr, CSSParserObserverWrapper* = nullptr, CSSParserEnum::NestedContext = { });
~CSSParserImpl();
enum class AllowedRules : uint8_t {
// As per css-syntax, css-cascade and css-namespaces, @charset rules
// must come first, followed by @import then @namespace.
// AllowImportRules actually means we allow @import and any rules that
// may follow it, i.e. @namespace rules and regular rules.
// AllowCharsetRules and AllowNamespaceRules behave similarly.
CharsetRules,
LayerStatementRules,
ImportRules,
NamespaceRules,
RegularRules,
KeyframeRules,
FontFeatureValuesRules,
NoRules, // For parsing at-rules inside declaration lists (without nesting support)
};
static CSSParser::ParseResult parseValue(MutableStyleProperties&, CSSPropertyID, const String&, IsImportant, const CSSParserContext&);
static CSSParser::ParseResult parseCustomPropertyValue(MutableStyleProperties&, const AtomString& propertyName, const String&, IsImportant, const CSSParserContext&);
static Ref<ImmutableStyleProperties> parseInlineStyleDeclaration(const String&, const Element&);
static bool parseDeclarationList(MutableStyleProperties*, const String&, const CSSParserContext&);
static RefPtr<StyleRuleBase> parseRule(const String&, const CSSParserContext&, StyleSheetContents*, AllowedRules, CSSParserEnum::NestedContext = { });
static void parseStyleSheet(const String&, const CSSParserContext&, StyleSheetContents&);
static CSSSelectorList parsePageSelector(CSSParserTokenRange, StyleSheetContents*);
static Vector<std::pair<CSSValueID, double>> parseKeyframeKeyList(const String&, const CSSParserContext&);
bool supportsDeclaration(CSSParserTokenRange&);
const CSSParserContext& context() const { return m_context; }
// This function updates the range it's given.
RefPtr<StyleRuleBase> consumeAtRule(CSSParserTokenRange&, AllowedRules);
static void parseDeclarationListForInspector(const String&, const CSSParserContext&, CSSParserObserver&);
static void parseStyleSheetForInspector(const String&, const CSSParserContext&, StyleSheetContents&, CSSParserObserver&);
static IsImportant consumeTrailingImportantAndWhitespace(CSSParserTokenRange&);
static RefPtr<StyleRuleNestedDeclarations> parseNestedDeclarations(const CSSParserContext&, const String&);
CSSTokenizer* tokenizer() const { return m_tokenizer.get(); }
private:
struct NestingContext {
// FIXME: Can we build StylePropertySets directly?
// FIXME: Investigate using a smaller inline buffer
ParsedPropertyVector m_parsedProperties;
Vector<Ref<StyleRuleBase>> m_parsedRules;
};
CSSParserImpl(const CSSParserContext&, StyleSheetContents*);
enum class RuleList : uint8_t {
TopLevel,
Regular,
Keyframes,
FontFeatureValues,
};
// Returns whether the first encountered rule was valid
template<typename T>
bool consumeRuleList(CSSParserTokenRange, RuleList, T callback);
// This function updates the range it's given.
RefPtr<StyleRuleBase> consumeQualifiedRule(CSSParserTokenRange&, AllowedRules);
// This function is used for all the nested group rules (@media, @layer, @supports, @scope, @container,..etc)
// It handles potentially orphaned declarations (in the context of style nesting)
// https://drafts.csswg.org/css-nesting/#conditionals
Vector<Ref<StyleRuleBase>> consumeNestedGroupRules(CSSParserTokenRange block);
static RefPtr<StyleRuleCharset> consumeCharsetRule(CSSParserTokenRange prelude);
RefPtr<StyleRuleImport> consumeImportRule(CSSParserTokenRange prelude);
RefPtr<StyleRuleNamespace> consumeNamespaceRule(CSSParserTokenRange prelude);
RefPtr<StyleRuleMedia> consumeMediaRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleSupports> consumeSupportsRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleViewport> consumeViewportRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleFontFace> consumeFontFaceRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleFontFeatureValuesBlock> consumeFontFeatureValuesRuleBlock(CSSAtRuleID, CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleFontFeatureValues> consumeFontFeatureValuesRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleFontPaletteValues> consumeFontPaletteValuesRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleKeyframes> consumeKeyframesRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRulePage> consumePageRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleCounterStyle> consumeCounterStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleLayer> consumeLayerRule(CSSParserTokenRange prelude, std::optional<CSSParserTokenRange> block);
RefPtr<StyleRuleContainer> consumeContainerRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleProperty> consumePropertyRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleScope> consumeScopeRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleStartingStyle> consumeStartingStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleViewTransition> consumeViewTransitionRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRulePositionTry> consumePositionTryRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleKeyframe> consumeKeyframeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleBase> consumeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
ParsedPropertyVector consumeDeclarationListInNewNestingContext(CSSParserTokenRange, StyleRuleType);
enum class OnlyDeclarations : bool { No, Yes };
enum class ParsingStyleDeclarationsInRuleList : bool { No, Yes };
// FIXME: We should return value for all those functions instead of using class member attributes.
void consumeBlockContent(CSSParserTokenRange, StyleRuleType, OnlyDeclarations, ParsingStyleDeclarationsInRuleList = ParsingStyleDeclarationsInRuleList::No);
void consumeDeclarationList(CSSParserTokenRange, StyleRuleType);
void consumeStyleBlock(CSSParserTokenRange, StyleRuleType, ParsingStyleDeclarationsInRuleList = ParsingStyleDeclarationsInRuleList::No);
bool consumeDeclaration(CSSParserTokenRange, StyleRuleType);
void consumeDeclarationValue(CSSParserTokenRange, CSSPropertyID, IsImportant, StyleRuleType);
void consumeCustomPropertyValue(CSSParserTokenRange, const AtomString& propertyName, IsImportant);
RefPtr<StyleSheetContents> protectedStyleSheet() const;
Ref<StyleRuleBase> createNestedDeclarationsRule();
void runInNewNestingContext(auto&& run);
NestingContext& topContext()
{
ASSERT(!m_nestingContextStack.isEmpty());
return m_nestingContextStack.last();
}
bool isStyleNestedContext()
{
return m_styleRuleNestingLevel;
}
// FIXME: we could unify all those into a single stack data structure.
// https://bugs.webkit.org/show_bug.cgi?id=265566
unsigned m_styleRuleNestingLevel { 0 };
unsigned m_ruleListNestingLevel { 0 };
Vector<CSSParserEnum::NestedContextType, 16> m_ancestorRuleTypeStack;
std::optional<CSSParserEnum::NestedContextType> lastAncestorRuleType() const
{
if (!m_ancestorRuleTypeStack.isEmpty())
return m_ancestorRuleTypeStack.last();
return { };
}
Vector<NestingContext> m_nestingContextStack { NestingContext { } };
const CSSParserContext& m_context;
RefPtr<StyleSheetContents> m_styleSheet;
std::unique_ptr<CSSTokenizer> m_tokenizer;
// For the inspector
WeakPtr<CSSParserObserverWrapper> m_observerWrapper;
};
} // namespace WebCore
|
