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8bdd05a389
This flag doesn't really make sense in sky, rules should only match if they're from the same scope or are a :host rule in the ShadowRoot on the element. Removing this also eliminates the ScopeContainsLastMatchedElement flag. For now we just check if the scope is null for the same behavior, in the future we'll never let scope be null and we'll just enforce the normal style scoping rules. R=ojan@chromium.org Review URL: https://codereview.chromium.org/833443003
114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
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* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
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* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
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* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
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* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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* Copyright (C) Research In Motion Limited 2011. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef SKY_ENGINE_CORE_CSS_SELECTORCHECKER_H_
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#define SKY_ENGINE_CORE_CSS_SELECTORCHECKER_H_
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#include "sky/engine/core/css/CSSSelector.h"
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#include "sky/engine/core/dom/Element.h"
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namespace blink {
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class CSSSelector;
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class ContainerNode;
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class Element;
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class RenderStyle;
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class SelectorChecker {
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WTF_MAKE_NONCOPYABLE(SelectorChecker);
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public:
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enum Mode { ResolvingStyle = 0, QueryingRules, SharingRules };
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explicit SelectorChecker(Document&, Mode);
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enum ContextFlags {
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// FIXME: Revmoe DefaultBehavior.
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DefaultBehavior = 0,
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TreatShadowHostAsNormalScope = 1,
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};
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struct SelectorCheckingContext {
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STACK_ALLOCATED();
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public:
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// Initial selector constructor
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SelectorCheckingContext(const CSSSelector& selector, Element* element)
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: selector(&selector)
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, element(element)
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, scope(nullptr)
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, elementStyle(0)
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, contextFlags(DefaultBehavior)
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{
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}
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const CSSSelector* selector;
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RawPtr<Element> element;
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RawPtr<const ContainerNode> scope;
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RenderStyle* elementStyle;
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ContextFlags contextFlags;
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};
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bool match(const SelectorCheckingContext&) const;
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static bool tagMatches(const Element&, const QualifiedName&);
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static bool isHostInItsShadowTree(const Element&, const ContainerNode* scope);
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private:
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bool checkPseudoClass(const SelectorCheckingContext&) const;
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bool checkOne(const SelectorCheckingContext&) const;
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Mode mode() const { return m_mode; }
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static bool checkExactAttribute(const Element&, const QualifiedName& selectorAttributeName, const StringImpl* value);
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static bool matchesFocusPseudoClass(const Element&);
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Mode m_mode;
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};
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inline bool SelectorChecker::tagMatches(const Element& element, const QualifiedName& tagQName)
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{
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const AtomicString& localName = tagQName.localName();
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return localName == starAtom || localName == element.localName();
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}
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inline bool SelectorChecker::checkExactAttribute(const Element& element, const QualifiedName& selectorAttributeName, const StringImpl* value)
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{
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AttributeCollection attributes = element.attributesWithoutUpdate();
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AttributeCollection::iterator end = attributes.end();
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for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
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if (it->matches(selectorAttributeName) && (!value || it->value().impl() == value))
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return true;
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}
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return false;
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}
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inline bool SelectorChecker::isHostInItsShadowTree(const Element& element, const ContainerNode* scope)
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{
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return scope && scope->isInShadowTree() && scope->shadowHost() == element;
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}
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}
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#endif // SKY_ENGINE_CORE_CSS_SELECTORCHECKER_H_
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