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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2022 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 "CSSParser.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 StyleRuleFontPaletteValues;
class StyleRuleImport;
class StyleRuleKeyframes;
class StyleRuleLayer;
class StyleRuleMedia;
class StyleRuleNamespace;
class StyleRulePage;
class StyleRuleSupports;
class StyleRuleViewport;
class StyleSheetContents;
class ImmutableStyleProperties;
class Element;
class MutableStyleProperties;
class CSSParserImpl {
WTF_MAKE_NONCOPYABLE(CSSParserImpl);
public:
CSSParserImpl(const CSSParserContext&, const String&, StyleSheetContents* = nullptr, CSSParserObserverWrapper* = nullptr);
enum AllowedRulesType {
// 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 thay
// may follow it, i.e. @namespace rules and regular rules.
// AllowCharsetRules and AllowNamespaceRules behave similarly.
AllowCharsetRules,
AllowLayerStatementRules,
AllowImportRules,
AllowNamespaceRules,
RegularRules,
KeyframeRules,
CounterStyleRules,
NoRules, // For parsing at-rules inside declaration lists
};
static CSSParser::ParseResult parseValue(MutableStyleProperties*, CSSPropertyID, const String&, bool important, const CSSParserContext&);
static CSSParser::ParseResult parseCustomPropertyValue(MutableStyleProperties*, const AtomString& propertyName, const String&, bool important, 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*, AllowedRulesType);
static void parseStyleSheet(const String&, const CSSParserContext&, StyleSheetContents&);
static CSSSelectorList parsePageSelector(CSSParserTokenRange, StyleSheetContents*);
static Vector<double> parseKeyframeKeyList(const String&);
bool supportsDeclaration(CSSParserTokenRange&);
const CSSParserContext& context() const { return m_context; }
static void parseDeclarationListForInspector(const String&, const CSSParserContext&, CSSParserObserver&);
static void parseStyleSheetForInspector(const String&, const CSSParserContext&, StyleSheetContents*, CSSParserObserver&);
CSSTokenizer* tokenizer() const { return m_tokenizer.get(); };
private:
CSSParserImpl(const CSSParserContext&, StyleSheetContents*);
enum RuleListType {
TopLevelRuleList,
RegularRuleList,
KeyframesRuleList
};
// Returns whether the first encountered rule was valid
template<typename T>
bool consumeRuleList(CSSParserTokenRange, RuleListType, T callback);
// These two functions update the range they're given
RefPtr<StyleRuleBase> consumeAtRule(CSSParserTokenRange&, AllowedRulesType);
RefPtr<StyleRuleBase> consumeQualifiedRule(CSSParserTokenRange&, AllowedRulesType);
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<StyleRuleFontPaletteValues> consumeFontPaletteValuesRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRuleKeyframes> consumeKeyframesRule(bool webkitPrefixed, 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<StyleRuleKeyframe> consumeKeyframeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
RefPtr<StyleRule> consumeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
void consumeDeclarationList(CSSParserTokenRange, StyleRuleType);
void consumeDeclaration(CSSParserTokenRange, StyleRuleType);
void consumeDeclarationValue(CSSParserTokenRange, CSSPropertyID, bool important, StyleRuleType);
void consumeCustomPropertyValue(CSSParserTokenRange, const AtomString& propertyName, bool important);
static Vector<double> consumeKeyframeKeyList(CSSParserTokenRange);
// FIXME: Can we build StylePropertySets directly?
// FIXME: Investigate using a smaller inline buffer
ParsedPropertyVector m_parsedProperties;
const CSSParserContext& m_context;
RefPtr<StyleSheetContents> m_styleSheet;
std::unique_ptr<CSSTokenizer> m_tokenizer;
// For the inspector
CSSParserObserverWrapper* m_observerWrapper { nullptr };
};
} // namespace WebCore
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