void JSNode::markChildren(MarkStack& markStack)
{
Base::markChildren(markStack);
Node* node = m_impl.get();
node->markJSEventListeners(markStack);
// Nodes in the document are kept alive by JSDocument::mark, so, if we're in
// the document, we need to mark the document, but we don't need to explicitly
// mark any other nodes.
if (node->inDocument()) {
// FIXME: Do we really want to call a virtual function, ownerDocument here,
// when the non-virtual inline function, document, is so much faster?!
if (Document* doc = node->ownerDocument())
markDOMNodeWrapper(markStack, doc, doc);
return;
}
// This is a node outside the document.
// Find the the root, and the highest ancestor with a wrapper.
Node* root = node;
Node* outermostNodeWithWrapper = node;
for (Node* current = m_impl.get(); current; current = current->parentNode()) {
root = current;
if (hasCachedDOMNodeWrapperUnchecked(current->document(), current))
outermostNodeWithWrapper = current;
}
// Only nodes that have no ancestors with wrappers mark the subtree. In the common
// case, the root of the detached subtree has a wrapper, so the tree will only
// get marked once. Nodes that aren't outermost need to mark the outermost
// in case it is otherwise unreachable.
// FIXME: In the non-common case of root not having a wrapper, this is still an O(n^2) algorithm,
// as we will traverse the whole tree as many times as there are nodes with wrappers in it.
if (node != outermostNodeWithWrapper) {
markDOMNodeWrapper(markStack, m_impl->document(), outermostNodeWithWrapper);
return;
}
// Mark the whole tree subtree.
for (Node* nodeToMark = root; nodeToMark; nodeToMark = nodeToMark->traverseNextNode())
markDOMNodeWrapper(markStack, m_impl->document(), nodeToMark);
}
void JSNode::markChildren(MarkStack& markStack)
{
Base::markChildren(markStack);
Node* node = m_impl.get();
node->markJSEventListeners(markStack);
// Nodes in the document are kept alive by JSDocument::mark, so, if we're in
// the document, we need to mark the document, but we don't need to explicitly
// mark any other nodes.
if (node->inDocument()) {
if (Document* doc = node->ownerDocument())
markDOMNodeWrapper(markStack, doc, doc);
return;
}
// This is a node outside the document.
// Find the the root, and the highest ancestor with a wrapper.
Node* root = node;
Node* outermostNodeWithWrapper = node;
for (Node* current = m_impl.get(); current; current = current->parentNode()) {
root = current;
if (hasCachedDOMNodeWrapperUnchecked(current->document(), current))
outermostNodeWithWrapper = current;
}
// Only nodes that have no ancestors with wrappers mark the subtree. In the common
// case, the root of the detached subtree has a wrapper, so the tree will only
// get marked once. Nodes that aren't outermost need to mark the outermost
// in case it is otherwise unreachable.
if (node != outermostNodeWithWrapper) {
markDOMNodeWrapper(markStack, m_impl->document(), outermostNodeWithWrapper);
return;
}
// Mark the whole tree subtree.
for (Node* nodeToMark = root; nodeToMark; nodeToMark = nodeToMark->traverseNextNode())
markDOMNodeWrapper(markStack, m_impl->document(), nodeToMark);
}
