V8BindingPerContextData* V8Proxy::retrievePerContextData(Frame* frame)
{
V8IsolatedContext* isolatedContext;
if (UNLIKELY(!!(isolatedContext = V8IsolatedContext::getEntered())))
return isolatedContext->perContextData();
return frame->script()->windowShell()->perContextData();
}
v8::Local<v8::Object> V8DOMWrapper::instantiateV8Object(V8Proxy* proxy, WrapperTypeInfo* type, void* impl)
{
#if ENABLE(WORKERS)
WorkerContext* workerContext = 0;
#endif
V8BindingPerContextData* contextData = 0;
V8IsolatedContext* isolatedContext;
if (UNLIKELY(!!(isolatedContext = V8IsolatedContext::getEntered()))) {
contextData = isolatedContext->perContextData();
} else if (!proxy) {
v8::Handle<v8::Context> context = v8::Context::GetCurrent();
if (!context.IsEmpty()) {
v8::Handle<v8::Object> globalPrototype = v8::Handle<v8::Object>::Cast(context->Global()->GetPrototype());
if (isWrapperOfType(globalPrototype, &V8DOMWindow::info)) {
Frame* frame = V8DOMWindow::toNative(globalPrototype)->frame();
if (frame && frame->script()->canExecuteScripts(NotAboutToExecuteScript))
proxy = V8Proxy::retrieve(frame);
}
#if ENABLE(WORKERS)
else if (isWrapperOfType(globalPrototype, &V8WorkerContext::info))
workerContext = V8WorkerContext::toNative(lookupDOMWrapper(V8WorkerContext::GetTemplate(), context->Global()));
#endif
}
}
v8::Local<v8::Object> instance;
if (!contextData) {
if (proxy)
contextData = perContextData(proxy);
#if ENABLE(WORKERS)
else if (workerContext)
contextData = perContextData(workerContext);
#endif
}
if (contextData)
instance = contextData->createWrapperFromCache(type);
else {
v8::Local<v8::Function> function = type->getTemplate()->GetFunction();
instance = SafeAllocation::newInstance(function);
}
if (!instance.IsEmpty()) {
// Avoid setting the DOM wrapper for failed allocations.
setDOMWrapper(instance, type, impl);
if (type == &V8HTMLDocument::info)
instance = V8HTMLDocument::WrapInShadowObject(instance, static_cast<Node*>(impl));
}
return instance;
}
