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/*
* Copyright (C) 2011-2018 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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 "CSSSelectorList.h"
#include "CSSSelectorParser.h"
#include "ExceptionOr.h"
#include "NodeList.h"
#include "SecurityOriginData.h"
#include "SelectorCompiler.h"
#include <wtf/HashMap.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
#include <wtf/text/AtomStringHash.h>
namespace WebCore {
class CSSSelector;
class ContainerNode;
class Document;
class Element;
namespace Style {
struct SelectorMatchingState;
};
class SelectorDataList {
public:
explicit SelectorDataList(const CSSSelectorList&);
bool matches(Element&) const;
Element* closest(Element&) const;
Ref<NodeList> queryAll(ContainerNode& rootNode) const;
Element* queryFirst(ContainerNode& rootNode) const;
bool shouldStoreInDocument() const { return m_matchType == MatchType::TagNameMatch || m_matchType == MatchType::ClassNameMatch; }
AtomString classNameToMatch() const;
private:
struct SelectorData {
const CSSSelector* selector;
#if ENABLE(CSS_SELECTOR_JIT)
mutable CompiledSelector compiledSelector { };
#endif
};
bool selectorMatches(const SelectorData&, Element&, const ContainerNode& rootNode, Style::SelectorMatchingState* = nullptr) const;
Element* selectorClosest(const SelectorData&, Element&, const ContainerNode& rootNode, Style::SelectorMatchingState* = nullptr) const;
template <typename OutputType> void execute(ContainerNode& rootNode, OutputType&) const;
template <typename OutputType> void executeFastPathForIdSelector(const ContainerNode& rootNode, const SelectorData&, const CSSSelector* idSelector, OutputType&) const;
template <typename OutputType> void executeSingleTagNameSelectorData(const ContainerNode& rootNode, const SelectorData&, OutputType&) const;
template <typename OutputType> void executeSingleClassNameSelectorData(const ContainerNode& rootNode, const SelectorData&, OutputType&) const;
template <typename OutputType> void executeSingleAttributeExactSelectorData(const ContainerNode& rootNode, const SelectorData&, OutputType&) const;
template <typename OutputType> void executeSingleSelectorData(const ContainerNode& rootNode, const ContainerNode& searchRootNode, const SelectorData&, OutputType&) const;
template <typename OutputType> void executeSingleMultiSelectorData(const ContainerNode& rootNode, OutputType&) const;
#if ENABLE(CSS_SELECTOR_JIT)
template <typename Checker, typename OutputType> void executeCompiledSimpleSelectorChecker(const ContainerNode& searchRootNode, Checker, OutputType&, const SelectorData&) const;
template <typename Checker, typename OutputType> void executeCompiledSelectorCheckerWithCheckingContext(const ContainerNode& rootNode, const ContainerNode& searchRootNode, Checker, OutputType&, const SelectorData&) const;
template <typename OutputType> void executeCompiledSingleMultiSelectorData(const ContainerNode& rootNode, OutputType&) const;
static bool compileSelector(const SelectorData&);
#endif // ENABLE(CSS_SELECTOR_JIT)
Vector<SelectorData> m_selectors;
mutable enum MatchType {
CompilableSingle,
CompilableSingleWithRootFilter,
CompilableMultipleSelectorMatch,
CompiledSingle,
CompiledSingleWithRootFilter,
CompiledMultipleSelectorMatch,
SingleSelector,
SingleSelectorWithRootFilter,
RightMostWithIdMatch,
TagNameMatch,
ClassNameMatch,
AttributeExactMatch,
MultipleSelectorMatch,
} m_matchType;
};
class SelectorQuery {
WTF_MAKE_TZONE_ALLOCATED(SelectorQuery);
WTF_MAKE_NONCOPYABLE(SelectorQuery);
public:
explicit SelectorQuery(CSSSelectorList&&);
bool matches(Element&) const;
Element* closest(Element&) const;
Ref<NodeList> queryAll(ContainerNode& rootNode) const;
Element* queryFirst(ContainerNode& rootNode) const;
bool shouldStoreInDocument() const { return m_selectors.shouldStoreInDocument(); }
AtomString classNameToMatch() const { return m_selectors.classNameToMatch(); }
private:
CSSSelectorList m_selectorList;
SelectorDataList m_selectors;
};
class SelectorQueryCache {
WTF_MAKE_TZONE_ALLOCATED(SelectorQueryCache);
public:
static SelectorQueryCache& singleton();
SelectorQuery* add(const String&, const Document&);
void clear();
private:
using Key = std::tuple<String, CSSSelectorParserContext, SecurityOriginData>;
UncheckedKeyHashMap<Key, std::unique_ptr<SelectorQuery>> m_entries;
};
inline bool SelectorQuery::matches(Element& element) const
{
return m_selectors.matches(element);
}
inline Element* SelectorQuery::closest(Element& element) const
{
return m_selectors.closest(element);
}
inline Ref<NodeList> SelectorQuery::queryAll(ContainerNode& rootNode) const
{
return m_selectors.queryAll(rootNode);
}
inline Element* SelectorQuery::queryFirst(ContainerNode& rootNode) const
{
return m_selectors.queryFirst(rootNode);
}
} // namespace WebCore
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