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/*
* Copyright (C) 2011, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2014 Samsung Electronics. 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.
*/
#ifndef SelectorQuery_h
#define SelectorQuery_h
#include "core/css/CSSSelectorList.h"
#include "platform/heap/Handle.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
#include "wtf/text/AtomicStringHash.h"
#include <memory>
namespace blink {
class CSSSelector;
class ContainerNode;
class Document;
class Element;
class ExceptionState;
template <typename NodeType>
class StaticNodeTypeList;
using StaticElementList = StaticNodeTypeList<Element>;
class SelectorDataList {
DISALLOW_NEW();
public:
void initialize(const CSSSelectorList&);
bool matches(Element&) const;
Element* closest(Element&) const;
StaticElementList* queryAll(ContainerNode& rootNode) const;
Element* queryFirst(ContainerNode& rootNode) const;
private:
bool canUseFastQuery(const ContainerNode& rootNode) const;
bool selectorMatches(const CSSSelector&,
Element&,
const ContainerNode&) const;
template <typename SelectorQueryTrait>
void collectElementsByClassName(
ContainerNode& rootNode,
const AtomicString& className,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
void collectElementsByTagName(ContainerNode& rootNode,
const QualifiedName& tagName,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
void findTraverseRootsAndExecute(
ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
enum MatchTraverseRootState {
DoesNotMatchTraverseRoots,
MatchesTraverseRoots
};
template <typename SelectorQueryTrait>
void executeForTraverseRoot(const CSSSelector&,
ContainerNode* traverseRoot,
MatchTraverseRootState,
ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait, typename SimpleElementListType>
void executeForTraverseRoots(const CSSSelector&,
SimpleElementListType& traverseRoots,
MatchTraverseRootState,
ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
bool selectorListMatches(ContainerNode& rootNode,
Element&,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
void executeSlow(ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
void executeSlowTraversingShadowTree(
ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
template <typename SelectorQueryTrait>
void execute(ContainerNode& rootNode,
typename SelectorQueryTrait::OutputType&) const;
Vector<const CSSSelector*> m_selectors;
bool m_usesDeepCombinatorOrShadowPseudo : 1;
bool m_needsUpdatedDistribution : 1;
};
class CORE_EXPORT SelectorQuery {
WTF_MAKE_NONCOPYABLE(SelectorQuery);
USING_FAST_MALLOC(SelectorQuery);
public:
static std::unique_ptr<SelectorQuery> adopt(CSSSelectorList);
bool matches(Element&) const;
Element* closest(Element&) const;
StaticElementList* queryAll(ContainerNode& rootNode) const;
Element* queryFirst(ContainerNode& rootNode) const;
private:
explicit SelectorQuery(CSSSelectorList);
SelectorDataList m_selectors;
CSSSelectorList m_selectorList;
};
class SelectorQueryCache {
USING_FAST_MALLOC(SelectorQueryCache);
public:
SelectorQuery* add(const AtomicString&, const Document&, ExceptionState&);
void invalidate();
private:
HashMap<AtomicString, std::unique_ptr<SelectorQuery>> m_entries;
};
} // namespace blink
#endif
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