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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
* Copyright (C) 2005-2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#include "PseudoElementIdentifier.h"
#include "SelectorMatchingState.h"
#include "StyleRelations.h"
#include "StyleScrollbarState.h"
#include <WebCore/CSSSelector.h>
#include <WebCore/Element.h>
#include <WebCore/StyleScopeOrdinal.h>
namespace WebCore {
class CSSSelector;
class Element;
class RenderScrollbar;
class RenderStyle;
class StyleRuleScope;
namespace SelectorCompiler {
class SelectorCodeGenerator;
}
class SelectorChecker {
WTF_MAKE_NONCOPYABLE(SelectorChecker);
enum class Match { SelectorMatches, SelectorFailsLocally, SelectorFailsAllSiblings, SelectorFailsCompletely };
enum class MatchType { VirtualPseudoElementOnly, Element };
struct MatchResult {
Match match;
MatchType matchType;
static MatchResult matches(MatchType matchType)
{
return { Match::SelectorMatches, matchType };
}
static MatchResult updateWithMatchType(MatchResult result, MatchType matchType)
{
if (matchType == MatchType::VirtualPseudoElementOnly)
result.matchType = MatchType::VirtualPseudoElementOnly;
return result;
}
static MatchResult fails(Match match)
{
return { match, MatchType::Element };
}
};
public:
enum class Mode : unsigned char {
ResolvingStyle = 0,
CollectingRules,
StyleInvalidation,
// This is used for querySelector() API
QueryingRules
};
SelectorChecker(Document&);
struct CheckingContext {
CheckingContext(SelectorChecker::Mode resolvingMode)
: resolvingMode(resolvingMode)
{ }
const SelectorChecker::Mode resolvingMode;
void setRequestedPseudoElement(Style::PseudoElementIdentifier);
std::optional<Style::PseudoElementIdentifier> requestedPseudoElement() const;
private:
friend class SelectorCompiler::SelectorCodeGenerator;
// These are simple fields so they are easier for SelectorCompiler to generate code against.
bool hasRequestedPseudoElement { false };
PseudoElementType pseudoElementType { };
AtomString pseudoElementNameArgument;
public:
std::optional<StyleScrollbarState> scrollbarState;
Vector<AtomString> classList;
RefPtr<const ContainerNode> scope;
const Element* hasScope { nullptr };
bool matchesAllHasScopes { false };
bool isEvaluatingScopingRoot { false };
Style::ScopeOrdinal styleScopeOrdinal { Style::ScopeOrdinal::Element };
Style::SelectorMatchingState* selectorMatchingState { nullptr };
// FIXME: It would be nicer to have a separate object for return values. This requires some more work in the selector compiler.
Style::Relations styleRelations;
EnumSet<PseudoElementType> publicPseudoElements;
bool matchedInsideScope { false };
bool disallowHasPseudoClass { false };
bool scopingRootMatchesVisited { false };
};
bool match(const CSSSelector&, const Element&, CheckingContext&) const;
bool matchHostPseudoClass(const CSSSelector&, const Element&, CheckingContext&) const;
static bool isCommonPseudoClassSelector(const CSSSelector*);
static bool attributeSelectorMatches(const Element&, const QualifiedName&, const AtomString& attributeValue, const CSSSelector&);
enum LinkMatchMask { MatchDefault = 0, MatchLink = 1, MatchVisited = 2, MatchAll = MatchLink | MatchVisited };
static unsigned determineLinkMatchType(const CSSSelector*, const StyleRuleScope* = nullptr);
struct LocalContext;
private:
MatchResult matchRecursively(CheckingContext&, LocalContext&, EnumSet<PseudoElementType>&) const;
bool checkOne(CheckingContext&, LocalContext&, MatchType&) const;
bool matchSelectorList(CheckingContext&, const LocalContext&, const Element&, const CSSSelectorList&) const;
bool matchHasPseudoClass(CheckingContext&, const Element&, const CSSSelector&) const;
bool checkScrollbarPseudoClass(const CheckingContext&, const Element&, const CSSSelector&) const;
bool checkViewTransitionPseudoClass(const CheckingContext&, const Element&, const CSSSelector&) const;
bool m_strictParsing;
bool m_documentIsHTML;
};
inline bool SelectorChecker::isCommonPseudoClassSelector(const CSSSelector* selector)
{
if (selector->match() != CSSSelector::Match::PseudoClass)
return false;
auto pseudoType = selector->pseudoClass();
return pseudoType == CSSSelector::PseudoClass::Link
|| pseudoType == CSSSelector::PseudoClass::AnyLink
|| pseudoType == CSSSelector::PseudoClass::Visited
|| pseudoType == CSSSelector::PseudoClass::Focus;
}
} // namespace WebCore
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