96 lines
3.9 KiB
C++
96 lines
3.9 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "AttributeChangeInvalidation.h"
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#include "ElementIterator.h"
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#include "StyleInvalidationFunctions.h"
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namespace WebCore {
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namespace Style {
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static bool mayBeAffectedByAttributeChange(const RuleFeatureSet& features, bool isHTML, const QualifiedName& attributeName)
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{
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auto& nameSet = isHTML ? features.attributeCanonicalLocalNamesInRules : features.attributeLocalNamesInRules;
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return nameSet.contains(attributeName.localName());
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}
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void AttributeChangeInvalidation::invalidateStyle(const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
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{
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if (newValue == oldValue)
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return;
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bool isHTML = m_element.isHTMLElement();
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bool shouldInvalidateCurrent = false;
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bool mayAffectStyleInShadowTree = false;
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auto attributeNameForLookups = attributeName.localName().convertToASCIILowercase();
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traverseRuleFeatures(m_element, [&] (const RuleFeatureSet& features, bool mayAffectShadowTree) {
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if (mayAffectShadowTree && mayBeAffectedByAttributeChange(features, isHTML, attributeName))
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mayAffectStyleInShadowTree = true;
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if (features.attributesAffectingHost.contains(attributeNameForLookups))
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shouldInvalidateCurrent = true;
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else if (features.contentAttributeNamesInRules.contains(attributeNameForLookups))
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shouldInvalidateCurrent = true;
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});
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if (mayAffectStyleInShadowTree) {
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// FIXME: More fine-grained invalidation.
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m_element.invalidateStyleForSubtree();
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}
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if (shouldInvalidateCurrent)
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m_element.invalidateStyle();
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auto& ruleSets = m_element.styleResolver().ruleSets();
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auto* invalidationRuleSets = ruleSets.attributeInvalidationRuleSets(attributeNameForLookups);
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if (!invalidationRuleSets)
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return;
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for (auto& invalidationRuleSet : *invalidationRuleSets) {
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for (auto* selector : invalidationRuleSet.invalidationSelectors) {
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bool oldMatches = !oldValue.isNull() && SelectorChecker::attributeSelectorMatches(m_element, attributeName, oldValue, *selector);
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bool newMatches = !newValue.isNull() && SelectorChecker::attributeSelectorMatches(m_element, attributeName, newValue, *selector);
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if (oldMatches != newMatches) {
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Invalidator::addToMatchElementRuleSets(m_matchElementRuleSets, invalidationRuleSet);
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break;
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}
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}
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}
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}
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void AttributeChangeInvalidation::invalidateStyleWithRuleSets()
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{
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Invalidator::invalidateWithMatchElementRuleSets(m_element, m_matchElementRuleSets);
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}
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}
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}
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