static ContainerNode* traverseParent(const Node* node, ShadowRootCrossing shadowRootCrossing)
{
if (node->isPseudoElement())
return toPseudoElement(node)->hostElement();
if (shadowRootCrossing == DontCrossShadowRoot && node->isShadowRoot())
return 0;
if (nodeCanBeDistributed(node)) {
if (InsertionPoint* insertionPoint = findInsertionPointOf(node))
return traverseParent(insertionPoint, shadowRootCrossing);
return nullptr;
}
ContainerNode* parent = node->parentNode();
if (!parent)
return nullptr;
if (parent->isShadowRoot())
return shadowRootCrossing == CrossShadowRoot ? toShadowRoot(parent)->hostElement() : parent;
if (parent->isInsertionPoint()) {
const InsertionPoint* insertionPoint = toInsertionPoint(parent);
if (insertionPoint->hasDistribution())
return nullptr;
if (insertionPoint->isActive())
return traverseParent(parent, shadowRootCrossing);
}
return parent;
}
static bool childAttachedAllowedWhenAttachingChildren(ContainerNode& node)
{
if (node.isShadowRoot())
return true;
if (node.isInsertionPoint())
return true;
if (node.isElementNode() && toElement(&node)->shadowRoot())
return true;
return false;
}
