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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016 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 "CSSParserSelector.h"
#include "CSSParserTokenRange.h"
#include <memory>
namespace WebCore {
struct CSSParserContext;
class CSSSelectorList;
class StyleSheetContents;
// FIXME: We should consider building CSSSelectors directly instead of using
// the intermediate CSSParserSelector.
class CSSSelectorParser {
public:
static CSSSelectorList parseSelector(CSSParserTokenRange, const CSSParserContext&, StyleSheetContents*);
static bool consumeANPlusB(CSSParserTokenRange&, std::pair<int, int>&);
private:
CSSSelectorParser(const CSSParserContext&, StyleSheetContents*);
// These will all consume trailing comments if successful
CSSSelectorList consumeComplexSelectorList(CSSParserTokenRange&);
CSSSelectorList consumeCompoundSelectorList(CSSParserTokenRange&);
std::unique_ptr<CSSParserSelector> consumeComplexSelector(CSSParserTokenRange&);
std::unique_ptr<CSSParserSelector> consumeCompoundSelector(CSSParserTokenRange&);
// This doesn't include element names, since they're handled specially
std::unique_ptr<CSSParserSelector> consumeSimpleSelector(CSSParserTokenRange&);
bool consumeName(CSSParserTokenRange&, AtomicString& name, AtomicString& namespacePrefix);
// These will return nullptr when the selector is invalid
std::unique_ptr<CSSParserSelector> consumeId(CSSParserTokenRange&);
std::unique_ptr<CSSParserSelector> consumeClass(CSSParserTokenRange&);
std::unique_ptr<CSSParserSelector> consumePseudo(CSSParserTokenRange&);
std::unique_ptr<CSSParserSelector> consumeAttribute(CSSParserTokenRange&);
CSSSelector::RelationType consumeCombinator(CSSParserTokenRange&);
CSSSelector::Match consumeAttributeMatch(CSSParserTokenRange&);
CSSSelector::AttributeMatchType consumeAttributeFlags(CSSParserTokenRange&);
const AtomicString& defaultNamespace() const;
const AtomicString& determineNamespace(const AtomicString& prefix);
void prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector*);
static std::unique_ptr<CSSParserSelector> addSimpleSelectorToCompound(std::unique_ptr<CSSParserSelector> compoundSelector, std::unique_ptr<CSSParserSelector> simpleSelector);
static std::unique_ptr<CSSParserSelector> splitCompoundAtImplicitShadowCrossingCombinator(std::unique_ptr<CSSParserSelector> compoundSelector, const CSSParserContext&);
const CSSParserContext& m_context;
RefPtr<StyleSheetContents> m_styleSheet; // FIXME: Should be const
bool m_failedParsing = false;
bool m_disallowPseudoElements = false;
class DisallowPseudoElementsScope {
WTF_MAKE_NONCOPYABLE(DisallowPseudoElementsScope);
public:
DisallowPseudoElementsScope(CSSSelectorParser* parser)
: m_parser(parser), m_wasDisallowed(m_parser->m_disallowPseudoElements)
{
m_parser->m_disallowPseudoElements = true;
}
~DisallowPseudoElementsScope()
{
m_parser->m_disallowPseudoElements = m_wasDisallowed;
}
private:
CSSSelectorParser* m_parser;
bool m_wasDisallowed;
};
};
} // namespace WebCore
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