void ContentDistributor::distribute(Element* host)
{
ASSERT(needsDistribution());
ASSERT(m_nodeToInsertionPoint.isEmpty());
m_validity = Valid;
ContentDistribution pool;
for (Node* node = host->firstChild(); node; node = node->nextSibling())
populate(node, pool);
Vector<bool> distributed(pool.size());
distributed.fill(false);
Vector<HTMLShadowElement*, 8> activeShadowInsertionPoints;
for (ShadowRoot* root = host->youngestShadowRoot(); root; root = root->olderShadowRoot()) {
HTMLShadowElement* firstActiveShadowInsertionPoint = 0;
const Vector<InsertionPoint*>& insertionPoints = root->insertionPointList();
for (size_t i = 0; i < insertionPoints.size(); ++i) {
InsertionPoint* point = insertionPoints[i];
if (!point->isActive())
continue;
if (isHTMLShadowElement(point)) {
if (!firstActiveShadowInsertionPoint)
firstActiveShadowInsertionPoint = toHTMLShadowElement(point);
} else {
distributeSelectionsTo(point, pool, distributed);
if (ElementShadow* shadow = point->parentNode()->isElementNode() ? toElement(point->parentNode())->shadow() : 0)
shadow->invalidateDistribution();
}
}
if (firstActiveShadowInsertionPoint)
activeShadowInsertionPoints.append(firstActiveShadowInsertionPoint);
}
for (size_t i = activeShadowInsertionPoints.size(); i > 0; --i) {
HTMLShadowElement* shadowElement = activeShadowInsertionPoints[i - 1];
ShadowRoot* root = shadowElement->shadowRoot();
ASSERT(root);
if (root->olderShadowRoot()) {
distributeNodeChildrenTo(shadowElement, root->olderShadowRoot());
root->olderShadowRoot()->setAssignedTo(shadowElement);
} else {
distributeSelectionsTo(shadowElement, pool, distributed);
if (ElementShadow* shadow = shadowElement->parentNode()->isElementNode() ? toElement(shadowElement->parentNode())->shadow() : 0)
shadow->invalidateDistribution();
}
}
}
bool ContentDistributor::invalidate(Element* host)
{
ASSERT(needsInvalidation());
bool needsReattach = (m_validity == Undetermined) || !m_nodeToInsertionPoint.isEmpty();
for (ShadowRoot* root = host->youngestShadowRoot(); root; root = root->olderShadowRoot()) {
root->setAssignedTo(0);
const Vector<InsertionPoint*>& insertionPoints = root->insertionPointList();
for (size_t i = 0; i < insertionPoints.size(); ++i) {
needsReattach = needsReattach || true;
insertionPoints[i]->clearDistribution();
}
}
m_validity = Invalidating;
m_nodeToInsertionPoint.clear();
return needsReattach;
}