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Issue #1593 - Part 4: Make :host pass DOM parsing test and basic specificity tests.

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Jeremy Andrews 2021-11-20 10:12:23 -06:00 • committed by roytam1
commit 9bf01d6708
1 changed files with 27 additions and 8 deletions
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35
layout/style/nsCSSRuleProcessor.cpp
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@ -1927,14 +1927,33 @@ static bool SelectorMatches(Element* aElement,
// compound selector. If this is the case, then also ensure that the
// host element matches against the compound
// selector.
return aElement->GetShadowRoot() &&
aTreeMatchContext.mOnlyMatchHostPseudo &&
!aSelector->HasFeatureSelectors() &&
!aSelector->mNext &&
(!pseudoClass->u.mSelectors ||
AnySelectorInArgListMatches(aElement, pseudoClass,
aNodeMatchContext,
aTreeMatchContext));
// We match automatically if GetParent() and GetShadowRoot() have
// the same result. Without special casing this ahead of all other
// selector matching, it fails. Have not determined the cause.
if (aElement->GetParent() == aElement->GetShadowRoot()) {
break;
}
// Match if any selector in the argument list matches.
NodeMatchContext nodeContext(EventStates(),
nsCSSRuleProcessor::IsLink(aElement));
if (AnySelectorInArgListMatches(aElement, pseudoClass,
nodeContext,
aTreeMatchContext)) {
break;
}
// Finally, with the exception of the two above cases, make sure we
// don't match if GetContainingShadow() returns null. For whatever
// reason, we can't test for this case first.
if (aElement->GetContainingShadow() == nullptr) {
return false;
}
}
break;