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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 "IdChangeInvalidation.h"
#include "ElementChildIteratorInlines.h"
#include "ElementRareData.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();
auto collect = [&](auto& ruleSets, std::optional<MatchElement> onlyMatchElement = { }) {
// 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.
bool mayAffectDescendantStyle = ruleSets.features().idsMatchingAncestorsInRules.contains(changedId);
if (mayAffectDescendantStyle)
m_element->invalidateStyleForSubtree();
else
m_element->invalidateStyle();
// Invalidation rulesets exist for :has() / :nth-child() / :nth-last-child.
if (auto* invalidationRuleSets = ruleSets.idInvalidationRuleSets(changedId)) {
for (auto& invalidationRuleSet : *invalidationRuleSets) {
if (onlyMatchElement && invalidationRuleSet.matchElement != onlyMatchElement)
continue;
Invalidator::addToMatchElementRuleSets(m_matchElementRuleSets, invalidationRuleSet);
}
}
};
collect(m_element->styleResolver().ruleSets());
if (auto* shadowRoot = m_element->shadowRoot())
collect(shadowRoot->styleScope().resolver().ruleSets(), MatchElement::Host);
}
void IdChangeInvalidation::invalidateStyleWithRuleSets()
{
Invalidator::invalidateWithMatchElementRuleSets(m_element, m_matchElementRuleSets);
}
}
}
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