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82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright (C) 2013 Google, Inc.
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. 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 SharedStyleFinder_h
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#define SharedStyleFinder_h
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#include "core/css/resolver/ElementResolveContext.h"
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#include "core/dom/Element.h"
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namespace blink {
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class Element;
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class Node;
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class RenderStyle;
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class RuleFeatureSet;
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class RuleSet;
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class SpaceSplitString;
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class StyleResolver;
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class SharedStyleFinder {
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STACK_ALLOCATED();
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public:
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// RuleSets are passed non-const as the act of matching against them can cause them
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// to be compacted. :(
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SharedStyleFinder(const ElementResolveContext& context,
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const RuleFeatureSet& features,
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RuleSet* attributeRuleSet, StyleResolver& styleResolver)
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: m_elementAffectedByClassRules(false)
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, m_features(features)
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, m_attributeRuleSet(attributeRuleSet)
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, m_styleResolver(styleResolver)
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, m_context(context)
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{ }
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RenderStyle* findSharedStyle();
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private:
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Element* findElementForStyleSharing() const;
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// Only used when we're collecting stats on styles.
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bool documentContainsValidCandidate() const;
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bool classNamesAffectedByRules(const SpaceSplitString&) const;
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bool canShareStyleWithElement(Element& candidate) const;
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bool sharingCandidateHasIdenticalStyleAffectingAttributes(Element& candidate) const;
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bool sharingCandidateCanShareHostStyles(Element& candidate) const;
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bool sharingCandidateDistributedToSameInsertionPoint(Element& candidate) const;
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bool matchesRuleSet(RuleSet*);
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Element& element() const { return *m_context.element(); }
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Document& document() const { return element().document(); }
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bool m_elementAffectedByClassRules;
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const RuleFeatureSet& m_features;
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RawPtrWillBeMember<RuleSet> m_attributeRuleSet;
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StyleResolver& m_styleResolver;
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const ElementResolveContext& m_context;
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};
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} // namespace blink
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#endif // SharedStyleFinder_h
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