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Issue #1592 - Part 5: Use flattened element tree when looking for a parent while matching ::slotted()

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FranklinDM 2023-03-18 23:08:00 +08:00 • committed by roytam1
commit 8d2533ad70
1 changed files with 16 additions and 5 deletions
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21
layout/style/nsCSSRuleProcessor.cpp
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@ -2566,6 +2566,11 @@ SelectorMatchesTree(Element* aPrevElement,
// The relevant link must be an ancestor of the node being matched.
aFlags = SelectorMatchesTreeFlags(aFlags & ~eLookForRelevantLink);
nsIContent* parent = prevElement->GetParent();
// Operate on the flattened element tree when matching the
// ::slotted() pseudo-element.
if (aTreeMatchContext.mRestrictToSlottedPseudo) {
parent = prevElement->GetFlattenedTreeParent();
}
if (parent) {
if (aTreeMatchContext.mForStyling)
parent->SetFlags(NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS);
@ -2576,7 +2581,12 @@ SelectorMatchesTree(Element* aPrevElement,
// for descendant combinators and child combinators, the element
// to test against is the parent
else {
nsIContent *content = prevElement->GetParent();
nsIContent* content = prevElement->GetParent();
// Operate on the flattened element tree when matching the
// ::slotted() pseudo-element.
if (aTreeMatchContext.mRestrictToSlottedPseudo) {
content = prevElement->GetFlattenedTreeParent();
}
// In the shadow tree, the shadow host behaves as if it
// is a featureless parent of top-level elements of the shadow
@ -2584,11 +2594,12 @@ SelectorMatchesTree(Element* aPrevElement,
// left most selector because ancestors of the host are not in
// the selector match list.
ShadowRoot* shadowRoot = content ?
ShadowRoot::FromNode(content) : nullptr;
ShadowRoot::FromNode(content) :
nullptr;
if (shadowRoot && !selector->mNext && !crossedShadowRootBoundary) {
content = shadowRoot->GetHost();
crossedShadowRootBoundary = true;
contentIsFeatureless = true;
content = shadowRoot->GetHost();
crossedShadowRootBoundary = true;
contentIsFeatureless = true;
}
// GetParent could return a document fragment; we only want