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add comments and formatting in mozilla upstream "bug 1440809, ensure we don't try to treat non-DOM-Node event targets as such, r=masayuki (89c8025537a5)"

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roytam1 2023-03-20 10:38:29 +08:00
commit 64329d41b6
1 changed files with 6 additions and 1 deletions
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7
dom/base/FragmentOrElement.cpp
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@ -1022,7 +1022,12 @@ nsIContent::GetEventTargetParent(EventChainPreVisitor& aVisitor)
nsContentUtils::Retarget(relatedTargetAsNode, this);
nsCOMPtr<nsINode> targetInKnownToBeHandledScope =
FindChromeAccessOnlySubtreeOwner(aVisitor.mTargetInKnownToBeHandledScope);
if (targetInKnownToBeHandledScope && nsContentUtils::ContentIsShadowIncludingDescendantOf(
// If aVisitor.mTargetInKnownToBeHandledScope wasn't nsINode,
// targetInKnownToBeHandledScope will be null. This may happen when
// dispatching event to Window object in a content page and
// propagating the event to a chrome Element.
if (targetInKnownToBeHandledScope &&
nsContentUtils::ContentIsShadowIncludingDescendantOf(
this, targetInKnownToBeHandledScope->SubtreeRoot())) {
// Part of step 11.4.
// "If target's root is a shadow-including inclusive ancestor of