inline void TreeScopeAdopter::moveNodeToNewDocument(
Node& node,
Document& oldDocument,
Document& newDocument) const {
DCHECK_NE(oldDocument, newDocument);
if (node.hasRareData()) {
NodeRareData* rareData = node.rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptDocument(oldDocument, newDocument);
}
oldDocument.moveNodeIteratorsToNewDocument(node, newDocument);
if (node.getCustomElementState() == CustomElementState::Custom) {
Element& element = toElement(node);
CustomElement::enqueueAdoptedCallback(&element, &oldDocument, &newDocument);
}
if (node.isShadowRoot())
toShadowRoot(node).setDocument(newDocument);
#if DCHECK_IS_ON()
didMoveToNewDocumentWasCalled = false;
oldDocumentDidMoveToNewDocumentWasCalledWith = &oldDocument;
#endif
node.didMoveToNewDocument(oldDocument);
#if DCHECK_IS_ON()
DCHECK(didMoveToNewDocumentWasCalled);
#endif
}
inline void TreeScopeAdopter::moveNodeToNewDocument(Node* node, Document* oldDocument, Document* newDocument) const
{
ASSERT(!node->inDocument() || oldDocument != newDocument);
newDocument->incrementReferencingNodeCount();
oldDocument->decrementReferencingNodeCount();
if (node->hasRareData()) {
NodeRareData* rareData = node->rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptDocument(oldDocument, newDocument);
}
if (oldDocument)
oldDocument->moveNodeIteratorsToNewDocument(node, newDocument);
if (is<ShadowRoot>(*node))
downcast<ShadowRoot>(*node).setDocumentScope(newDocument);
#ifndef NDEBUG
didMoveToNewDocumentWasCalled = false;
oldDocumentDidMoveToNewDocumentWasCalledWith = oldDocument;
#endif
node->didMoveToNewDocument(oldDocument);
ASSERT(didMoveToNewDocumentWasCalled);
}
void TreeScopeAdopter::moveTreeToNewScope(Node& root) const
{
ASSERT(needsScopeChange());
#if !ENABLE(OILPAN)
oldScope().guardRef();
#endif
// If an element is moved from a document and then eventually back again the collection cache for
// that element may contain stale data as changes made to it will have updated the DOMTreeVersion
// of the document it was moved to. By increasing the DOMTreeVersion of the donating document here
// we ensure that the collection cache will be invalidated as needed when the element is moved back.
Document& oldDocument = oldScope().document();
Document& newDocument = newScope().document();
bool willMoveToNewDocument = oldDocument != newDocument;
AXObjectCache* axObjectCache = oldDocument.existingAXObjectCache();
if (willMoveToNewDocument)
oldDocument.incDOMTreeVersion();
for (Node& node : NodeTraversal::inclusiveDescendantsOf(root)) {
updateTreeScope(node);
if (willMoveToNewDocument) {
if (axObjectCache)
axObjectCache->remove(&node);
moveNodeToNewDocument(node, oldDocument, newDocument);
} else if (node.hasRareData()) {
NodeRareData* rareData = node.rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!node.isElementNode())
continue;
if (node.hasSyntheticAttrChildNodes()) {
WillBeHeapVector<RefPtrWillBeMember<Attr>>& attrs = *toElement(node).attrNodeList();
for (unsigned i = 0; i < attrs.size(); ++i)
moveTreeToNewScope(*attrs[i]);
}
for (ShadowRoot* shadow = node.youngestShadowRoot(); shadow; shadow = shadow->olderShadowRoot()) {
shadow->setParentTreeScope(newScope());
if (willMoveToNewDocument)
moveTreeToNewDocument(*shadow, oldDocument, newDocument);
}
}
#if !ENABLE(OILPAN)
oldScope().guardDeref();
#endif
}
PassRefPtr<NodeList> HTMLFormControlElement::labels()
{
if (!isLabelable())
return 0;
if (!document())
return 0;
NodeRareData* data = Node::ensureRareData();
if (!data->nodeLists()) {
data->setNodeLists(NodeListsNodeData::create());
document()->addNodeListCache();
}
return LabelsNodeList::create(this);
}
void TreeScopeAdopter::moveTreeToNewScope(Node& root) const {
DCHECK(needsScopeChange());
// If an element is moved from a document and then eventually back again the
// collection cache for that element may contain stale data as changes made to
// it will have updated the DOMTreeVersion of the document it was moved to. By
// increasing the DOMTreeVersion of the donating document here we ensure that
// the collection cache will be invalidated as needed when the element is
// moved back.
Document& oldDocument = oldScope().document();
Document& newDocument = newScope().document();
bool willMoveToNewDocument = oldDocument != newDocument;
if (willMoveToNewDocument)
oldDocument.incDOMTreeVersion();
for (Node& node : NodeTraversal::inclusiveDescendantsOf(root)) {
updateTreeScope(node);
if (willMoveToNewDocument) {
moveNodeToNewDocument(node, oldDocument, newDocument);
} else if (node.hasRareData()) {
NodeRareData* rareData = node.rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!node.isElementNode())
continue;
Element& element = toElement(node);
if (HeapVector<Member<Attr>>* attrs = element.attrNodeList()) {
for (const auto& attr : *attrs)
moveTreeToNewScope(*attr);
}
for (ShadowRoot* shadow = element.youngestShadowRoot(); shadow;
shadow = shadow->olderShadowRoot()) {
shadow->setParentTreeScope(newScope());
if (willMoveToNewDocument)
moveTreeToNewDocument(*shadow, oldDocument, newDocument);
}
}
if (!willMoveToNewDocument)
return;
oldDocument.didMoveTreeToNewDocument(root);
}
// FIXME: Do we ever change tree scopes except between documents?
void TreeScopeAdopter::moveTreeToNewScope(Node* root) const
{
ASSERT(needsScopeChange());
// If an element is moved from a document and then eventually back again the collection cache for
// that element may contain stale data as changes made to it will have updated the DOMTreeVersion
// of the document it was moved to. By increasing the DOMTreeVersion of the donating document here
// we ensure that the collection cache will be invalidated as needed when the element is moved back.
Document& oldDocument = m_oldScope.documentScope();
Document& newDocument = m_newScope.documentScope();
bool willMoveToNewDocument = &oldDocument != &newDocument;
if (willMoveToNewDocument) {
oldDocument.incrementReferencingNodeCount();
oldDocument.incDOMTreeVersion();
}
for (Node* node = root; node; node = NodeTraversal::next(node, root)) {
updateTreeScope(node);
if (willMoveToNewDocument)
moveNodeToNewDocument(node, &oldDocument, &newDocument);
else if (node->hasRareData()) {
NodeRareData* rareData = node->rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!is<Element>(*node))
continue;
if (node->hasSyntheticAttrChildNodes()) {
const Vector<RefPtr<Attr>>& attrs = downcast<Element>(*node).attrNodeList();
for (unsigned i = 0; i < attrs.size(); ++i)
moveTreeToNewScope(attrs[i].get());
}
if (ShadowRoot* shadow = node->shadowRoot()) {
shadow->setParentTreeScope(&m_newScope);
if (willMoveToNewDocument)
moveShadowTreeToNewDocument(shadow, &oldDocument, &newDocument);
}
}
if (willMoveToNewDocument)
oldDocument.decrementReferencingNodeCount();
}
void TreeScopeAdopter::moveTreeToNewScope(Node* root) const
{
ASSERT(needsScopeChange());
m_oldScope->guardRef();
// If an element is moved from a document and then eventually back again the collection cache for
// that element may contain stale data as changes made to it will have updated the DOMTreeVersion
// of the document it was moved to. By increasing the DOMTreeVersion of the donating document here
// we ensure that the collection cache will be invalidated as needed when the element is moved back.
Document* oldDocument = m_oldScope->documentScope();
Document* newDocument = m_newScope->documentScope();
bool willMoveToNewDocument = oldDocument != newDocument;
if (oldDocument && willMoveToNewDocument)
oldDocument->incDOMTreeVersion();
for (Node* node = root; node; node = NodeTraversal::next(node, root)) {
updateTreeScope(node);
if (willMoveToNewDocument)
moveNodeToNewDocument(node, oldDocument, newDocument);
else if (node->hasRareData()) {
NodeRareData* rareData = node->rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!node->isElementNode())
continue;
if (node->hasSyntheticAttrChildNodes()) {
const Vector<RefPtr<Attr> >& attrs = toElement(node)->attrNodeList();
for (unsigned i = 0; i < attrs.size(); ++i)
moveTreeToNewScope(attrs[i].get());
}
for (ShadowRoot* shadow = node->youngestShadowRoot(); shadow; shadow = shadow->olderShadowRoot()) {
shadow->setParentTreeScope(m_newScope);
if (willMoveToNewDocument)
moveTreeToNewDocument(shadow, oldDocument, newDocument);
}
}
m_oldScope->guardDeref();
}
inline void TreeScopeAdopter::moveNodeToNewDocument(Node& node, Document& oldDocument, Document& newDocument) const
{
ASSERT(oldDocument != newDocument);
if (node.hasRareData()) {
NodeRareData* rareData = node.rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptDocument(oldDocument, newDocument);
}
oldDocument.moveNodeIteratorsToNewDocument(node, newDocument);
if (node.isShadowRoot())
toShadowRoot(node).setDocument(newDocument);
#ifndef NDEBUG
didMoveToNewDocumentWasCalled = false;
oldDocumentDidMoveToNewDocumentWasCalledWith = &oldDocument;
#endif
node.didMoveToNewDocument(oldDocument);
ASSERT(didMoveToNewDocumentWasCalled);
}