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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, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 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.
*/
#ifndef SelectorChecker_h
#define SelectorChecker_h
#include "CSSSelector.h"
#include "Element.h"
#include "SpaceSplitString.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>
namespace WebCore {
class CSSSelector;
class Element;
class RenderScrollbar;
class RenderStyle;
class SelectorChecker {
WTF_MAKE_NONCOPYABLE(SelectorChecker);
enum Match { SelectorMatches, SelectorFailsLocally, SelectorFailsAllSiblings, SelectorFailsCompletely };
public:
enum class Mode : unsigned char {
ResolvingStyle = 0, CollectingRules, CollectingRulesIgnoringVirtualPseudoElements, QueryingRules
};
SelectorChecker(Document&);
struct CheckingContext {
CheckingContext(SelectorChecker::Mode resolvingMode)
: resolvingMode(resolvingMode)
, elementStyle(nullptr)
, pseudoId(NOPSEUDO)
, scrollbar(nullptr)
, scrollbarPart(NoPart)
, scope(nullptr)
{ }
SelectorChecker::Mode resolvingMode;
RenderStyle* elementStyle;
PseudoId pseudoId;
RenderScrollbar* scrollbar;
ScrollbarPart scrollbarPart;
const ContainerNode* scope;
};
struct CheckingContextWithStatus;
bool match(const CSSSelector*, Element*, const CheckingContext&) const;
static bool tagMatches(const Element*, const QualifiedName&);
static bool isCommonPseudoClassSelector(const CSSSelector*);
static bool matchesFocusPseudoClass(const Element*);
static bool checkExactAttribute(const Element*, const CSSSelector*, const QualifiedName& selectorAttributeName, const AtomicStringImpl* value);
enum LinkMatchMask { MatchLink = 1, MatchVisited = 2, MatchAll = MatchLink | MatchVisited };
static unsigned determineLinkMatchType(const CSSSelector*);
private:
Match matchRecursively(const CheckingContextWithStatus&, PseudoId&) const;
bool checkOne(const CheckingContextWithStatus&) const;
bool checkScrollbarPseudoClass(const CheckingContextWithStatus&, const CSSSelector*) const;
bool m_strictParsing;
bool m_documentIsHTML;
};
inline bool SelectorChecker::isCommonPseudoClassSelector(const CSSSelector* selector)
{
if (selector->match() != CSSSelector::PseudoClass)
return false;
CSSSelector::PseudoClassType pseudoType = selector->pseudoClassType();
return pseudoType == CSSSelector::PseudoClassLink
|| pseudoType == CSSSelector::PseudoClassAnyLink
|| pseudoType == CSSSelector::PseudoClassVisited
|| pseudoType == CSSSelector::PseudoClassFocus;
}
inline bool SelectorChecker::tagMatches(const Element* element, const QualifiedName& tagQName)
{
if (tagQName == anyQName())
return true;
const AtomicString& localName = tagQName.localName();
if (localName != starAtom && localName != element->localName())
return false;
const AtomicString& namespaceURI = tagQName.namespaceURI();
return namespaceURI == starAtom || namespaceURI == element->namespaceURI();
}
inline bool SelectorChecker::checkExactAttribute(const Element* element, const CSSSelector* selector, const QualifiedName& selectorAttributeName, const AtomicStringImpl* value)
{
if (!element->hasAttributesWithoutUpdate())
return false;
const AtomicString& localName = element->isHTMLElement() ? selector->attributeCanonicalLocalName() : selectorAttributeName.localName();
for (const Attribute& attribute : element->attributesIterator()) {
if (attribute.matches(selectorAttributeName.prefix(), localName, selectorAttributeName.namespaceURI()) && (!value || attribute.value().impl() == value))
return true;
}
return false;
}
}
#endif
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