/* * 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. */ #include "config.h" #include "IdChangeInvalidation.h" #include "ElementChildIterator.h" #include "StyleInvalidationFunctions.h" namespace WebCore { namespace Style { void IdChangeInvalidation::invalidateStyle(const AtomString& changedId) { if (changedId.isEmpty()) return; bool mayAffectStyle = false; bool mayAffectStyleInShadowTree = false; traverseRuleFeatures(m_element, [&] (const RuleFeatureSet& features, bool mayAffectShadowTree) { if (!features.idsInRules.contains(changedId)) return; mayAffectStyle = true; if (mayAffectShadowTree) mayAffectStyleInShadowTree = true; }); if (!mayAffectStyle) return; if (mayAffectStyleInShadowTree) { m_element.invalidateStyleForSubtree(); return; } m_element.invalidateStyle(); // This could be easily optimized for fine-grained descendant invalidation similar to ClassChangeInvalidation. // However using ids for dynamic styling is rare and this is probably not worth the memory cost of the required data structures. auto& ruleSets = m_element.styleResolver().ruleSets(); bool mayAffectDescendantStyle = ruleSets.features().idsMatchingAncestorsInRules.contains(changedId); if (mayAffectDescendantStyle) m_element.invalidateStyleForSubtree(); else m_element.invalidateStyle(); } } }