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/*
* 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 "AttributeChangeInvalidation.h"
#include "ElementIterator.h"
#include "ElementRareData.h"
#include "StyleInvalidationFunctions.h"
namespace WebCore {
namespace Style {
static bool mayBeAffectedByAttributeChange(const RuleFeatureSet& features, bool isHTML, const QualifiedName& attributeName)
{
auto& nameSet = isHTML ? features.attributeLowercaseLocalNamesInRules : features.attributeLocalNamesInRules;
return nameSet.contains(attributeName.localName());
}
void AttributeChangeInvalidation::invalidateStyle(const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
{
if (newValue == oldValue)
return;
bool isHTML = m_element->isHTMLElement() && m_element->document().isHTMLDocument();
bool shouldInvalidateCurrent = false;
bool mayAffectStyleInShadowTree = false;
auto attributeNameForLookups = attributeName.localNameLowercase();
traverseRuleFeatures(m_element, [&] (const RuleFeatureSet& features, bool mayAffectShadowTree) {
if (mayAffectShadowTree && mayBeAffectedByAttributeChange(features, isHTML, attributeName))
mayAffectStyleInShadowTree = true;
if (features.attributesAffectingHost.contains(attributeNameForLookups))
shouldInvalidateCurrent = true;
else if (features.contentAttributeNamesInRules.contains(attributeNameForLookups))
shouldInvalidateCurrent = true;
});
if (mayAffectStyleInShadowTree) {
// FIXME: More fine-grained invalidation.
m_element->invalidateStyleForSubtree();
}
if (shouldInvalidateCurrent)
m_element->invalidateStyle();
auto collect = [&](auto& ruleSets, std::optional<MatchElement> onlyMatchElement = { }) {
auto* invalidationRuleSets = ruleSets.attributeInvalidationRuleSets(attributeNameForLookups);
if (!invalidationRuleSets)
return;
for (auto& invalidationRuleSet : *invalidationRuleSets) {
if (onlyMatchElement && invalidationRuleSet.matchElement != onlyMatchElement)
continue;
for (auto* selector : invalidationRuleSet.invalidationSelectors) {
if (!selector->isAttributeSelector()) {
ASSERT_NOT_REACHED();
continue;
}
bool oldMatches = !oldValue.isNull() && SelectorChecker::attributeSelectorMatches(m_element, attributeName, oldValue, *selector);
bool newMatches = !newValue.isNull() && SelectorChecker::attributeSelectorMatches(m_element, attributeName, newValue, *selector);
if (oldMatches != newMatches) {
Invalidator::addToMatchElementRuleSets(m_matchElementRuleSets, invalidationRuleSet);
break;
}
}
}
};
collect(m_element->styleResolver().ruleSets());
if (auto* shadowRoot = m_element->shadowRoot())
collect(shadowRoot->styleScope().resolver().ruleSets(), MatchElement::Host);
}
void AttributeChangeInvalidation::invalidateStyleWithRuleSets()
{
Invalidator::invalidateWithMatchElementRuleSets(m_element, m_matchElementRuleSets);
}
}
}
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