/* * Copyright (C) 2016 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef AttributeChangeInvalidation_h #define AttributeChangeInvalidation_h #include "Element.h" namespace WebCore { class RuleSet; namespace Style { class AttributeChangeInvalidation { public: AttributeChangeInvalidation(Element&, const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue); ~AttributeChangeInvalidation(); private: void invalidateStyle(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue); void invalidateDescendants(); const bool m_isEnabled; Element& m_element; const RuleSet* m_descendantInvalidationRuleSet { nullptr }; }; inline AttributeChangeInvalidation::AttributeChangeInvalidation(Element& element, const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue) : m_isEnabled(element.needsStyleInvalidation()) , m_element(element) { if (!m_isEnabled) return; invalidateStyle(attributeName, oldValue, newValue); invalidateDescendants(); } inline AttributeChangeInvalidation::~AttributeChangeInvalidation() { if (!m_isEnabled) return; invalidateDescendants(); } } } #endif