nsresult
HTMLContentElement::BindToTree(nsIDocument* aDocument,
nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
ShadowRoot* containingShadow = GetContainingShadow();
if (containingShadow) {
nsINode* parentNode = nsINode::GetParentNode();
while (parentNode && parentNode != containingShadow) {
if (parentNode->IsElement() &&
parentNode->AsElement()->IsHTML(nsGkAtoms::content)) {
// Content element in fallback content is not an insertion point.
return NS_OK;
}
parentNode = parentNode->GetParentNode();
}
// If the content element is being inserted into a ShadowRoot,
// add this element to the list of insertion points.
mIsInsertionPoint = true;
containingShadow->AddInsertionPoint(this);
containingShadow->SetInsertionPointChanged();
}
return NS_OK;
}
void
HTMLContentElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
if (mIsInsertionPoint) {
ShadowRoot* containingShadow = GetContainingShadow();
// Make sure that containingShadow exists, it may have been nulled
// during unlinking in which case the ShadowRoot is going away.
if (containingShadow) {
containingShadow->RemoveInsertionPoint(this);
// Remove all the assigned nodes now that the
// insertion point now that the insertion point is
// no longer a descendant of a ShadowRoot.
ClearMatchedNodes();
containingShadow->SetInsertionPointChanged();
}
mIsInsertionPoint = false;
}
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}