LocalFrame* LinkResource::loadingFrame() const
{
HTMLImportsController* import = m_owner->document().importsController();
if (!import)
return m_owner->document().frame();
return import->frame();
}
void LinkImport::process()
{
if (m_child)
return;
if (!m_owner)
return;
if (!shouldLoadResource())
return;
if (!m_owner->document().import()) {
ASSERT(m_owner->document().frame()); // The document should be the master.
HTMLImportsController::provideTo(m_owner->document());
}
LinkRequestBuilder builder(m_owner);
if (!builder.isValid()) {
didFinish();
return;
}
HTMLImport* parent = m_owner->document().import();
HTMLImportsController* controller = parent->controller();
m_child = controller->load(parent, this, builder.build(true));
if (!m_child) {
didFinish();
return;
}
}
void LinkImport::process()
{
if (m_loader)
return;
if (!m_owner)
return;
if (!m_owner->document()->frame() && !m_owner->document()->import())
return;
if (!m_owner->document()->import()) {
ASSERT(m_owner->document()->frame()); // The document should be the master.
HTMLImportsController::provideTo(m_owner->document());
}
LinkRequestBuilder builder(m_owner);
if (!builder.isValid()) {
didFinish();
return;
}
HTMLImport* parent = m_owner->document()->import();
HTMLImportsController* controller = parent->controller();
m_loader = controller->createLoader(parent, builder.build(true));
if (!m_loader) {
didFinish();
return;
}
m_loader->addClient(this);
}
inline Document* StyleEngine::master()
{
if (isMaster())
return m_document;
HTMLImportsController* import = document().importsController();
if (!import) // Document::import() can return null while executing its destructor.
return 0;
return import->master();
}
bool traverseTree(Node* rootNode, WillBeHeapVector<RawPtrWillBeMember<Node>, initialNodeVectorSize>* partiallyDependentNodes)
{
// To make each minor GC time bounded, we might need to give up
// traversing at some point for a large DOM tree. That being said,
// I could not observe the need even in pathological test cases.
for (Node& node : NodeTraversal::startsAt(rootNode)) {
if (node.containsWrapper()) {
if (!node.isV8CollectableDuringMinorGC()) {
// This node is not in the new space of V8. This indicates that
// the minor GC cannot anyway judge reachability of this DOM tree.
// Thus we give up traversing the DOM tree.
return false;
}
node.clearV8CollectableDuringMinorGC();
partiallyDependentNodes->append(&node);
}
if (ShadowRoot* shadowRoot = node.youngestShadowRoot()) {
if (!traverseTree(shadowRoot, partiallyDependentNodes))
return false;
} else if (node.isShadowRoot()) {
if (ShadowRoot* shadowRoot = toShadowRoot(node).olderShadowRoot()) {
if (!traverseTree(shadowRoot, partiallyDependentNodes))
return false;
}
}
// <template> has a |content| property holding a DOM fragment which we must traverse,
// just like we do for the shadow trees above.
if (isHTMLTemplateElement(node)) {
if (!traverseTree(toHTMLTemplateElement(node).content(), partiallyDependentNodes))
return false;
}
// Document maintains the list of imported documents through HTMLImportsController.
if (node.isDocumentNode()) {
Document& document = toDocument(node);
HTMLImportsController* controller = document.importsController();
if (controller && document == controller->master()) {
for (unsigned i = 0; i < controller->loaderCount(); ++i) {
if (!traverseTree(controller->loaderDocumentAt(i), partiallyDependentNodes))
return false;
}
}
}
}
return true;
}