void V8WorkerContextEventListener::handleEvent(ScriptExecutionContext* context, Event* event)
{
if (!context)
return;
// The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it.
// See issue 889829.
RefPtr<V8AbstractEventListener> protect(this);
v8::HandleScope handleScope;
WorkerContextExecutionProxy* proxy = workerProxy(context);
if (!proxy)
return;
v8::Handle<v8::Context> v8Context = proxy->context();
if (v8Context.IsEmpty())
return;
// Enter the V8 context in which to perform the event handling.
v8::Context::Scope scope(v8Context);
// Get the V8 wrapper for the event object.
v8::Handle<v8::Value> jsEvent = toV8(event);
invokeEventHandler(context, event, jsEvent);
}
v8::Local<v8::Value> V8WorkerContextEventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event)
{
V8GCController::checkMemoryUsage();
v8::Local<v8::Function> handlerFunction = getListenerFunction(context);
v8::Local<v8::Object> receiver = getReceiverObject(context, event);
if (handlerFunction.IsEmpty() || receiver.IsEmpty())
return v8::Local<v8::Value>();
InspectorInstrumentationCookie cookie;
if (InspectorInstrumentation::timelineAgentEnabled(context)) {
String resourceName("undefined");
int lineNumber = 1;
v8::ScriptOrigin origin = handlerFunction->GetScriptOrigin();
if (!origin.ResourceName().IsEmpty()) {
resourceName = toWebCoreString(origin.ResourceName());
lineNumber = handlerFunction->GetScriptLineNumber() + 1;
}
cookie = InspectorInstrumentation::willCallFunction(context, resourceName, lineNumber);
}
v8::Handle<v8::Value> parameters[1] = { jsEvent };
V8RecursionScope recursionScope(context);
v8::Local<v8::Value> result = handlerFunction->Call(receiver, 1, parameters);
if (WorkerContextExecutionProxy* proxy = workerProxy(context))
proxy->trackEvent(event);
InspectorInstrumentation::didCallFunction(cookie);
return result;
}
v8::Local<v8::Value> V8WorkerContextEventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event)
{
v8::Local<v8::Function> handlerFunction = getListenerFunction(context);
v8::Local<v8::Object> receiver = getReceiverObject(context, event);
if (handlerFunction.IsEmpty() || receiver.IsEmpty())
return v8::Local<v8::Value>();
v8::Handle<v8::Value> parameters[1] = { jsEvent };
v8::Local<v8::Value> result = handlerFunction->Call(receiver, 1, parameters);
if (WorkerContextExecutionProxy* proxy = workerProxy(context))
proxy->trackEvent(event);
return result;
}