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https://github.com/darlinghq/darling-WebCore.git
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72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
/*
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* Copyright (C) 2016 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Styleable.h"
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#include <wtf/HashMap.h>
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namespace WebCore {
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class Document;
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class Element;
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class Node;
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class RenderStyle;
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class SelectorFilter;
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class SpaceSplitString;
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class StyledElement;
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namespace Style {
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class RuleSet;
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class ScopeRuleSets;
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class Update;
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class SharingResolver {
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public:
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SharingResolver(const Document&, const ScopeRuleSets&, const SelectorFilter&);
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std::unique_ptr<RenderStyle> resolve(const Styleable&, const Update&);
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private:
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struct Context;
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StyledElement* findSibling(const Context&, Node*, unsigned& count) const;
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Node* locateCousinList(const Element* parent) const;
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bool canShareStyleWithElement(const Context&, const StyledElement& candidateElement) const;
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bool styleSharingCandidateMatchesRuleSet(const StyledElement&, const RuleSet*) const;
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bool sharingCandidateHasIdenticalStyleAffectingAttributes(const Context&, const StyledElement& sharingCandidate) const;
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bool classNamesAffectedByRules(const SpaceSplitString& classNames) const;
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const Document& m_document;
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const ScopeRuleSets& m_ruleSets;
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const SelectorFilter& m_selectorFilter;
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HashMap<const Element*, const Element*> m_elementsSharingStyle;
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};
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}
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}
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