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Bug 1377993 - Make node slots less memory hungry in common cases.

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Tag UXP Issue #1344
This commit is contained in:
Gaming4JC 2020-01-04 19:48:30 -05:00 • committed by Roy Tam
commit dd7fa403a8
9 changed files with 203 additions and 178 deletions
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6
dom/html/nsGenericHTMLElement.cpp
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@ -497,7 +497,7 @@ nsGenericHTMLElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
// We need to consider a labels element is moved to another subtree
// with different root, it needs to update labels list and its root
// as well.
nsDOMSlots* slots = GetExistingDOMSlots();
nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
if (slots && slots->mLabelsList) {
slots->mLabelsList->MaybeResetRoot(SubtreeRoot());
}
@ -524,7 +524,7 @@ nsGenericHTMLElement::UnbindFromTree(bool aDeep, bool aNullParent)
// We need to consider a labels element is removed from tree,
// it needs to update labels list and its root as well.
nsDOMSlots* slots = GetExistingDOMSlots();
nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
if (slots && slots->mLabelsList) {
slots->mLabelsList->MaybeResetRoot(SubtreeRoot());
}
@ -1730,7 +1730,7 @@ nsGenericHTMLElement::Labels()
{
MOZ_ASSERT(IsLabelable(),
"Labels() only allow labelable elements to use it.");
nsDOMSlots* slots = DOMSlots();
nsExtendedDOMSlots* slots = ExtendedDOMSlots();
if (!slots->mLabelsList) {
slots->mLabelsList = new nsLabelsNodeList(SubtreeRoot(), MatchLabelsElement,