/* | |
* Copyright (C) 2008 Apple Inc. All Rights Reserved. | |
* Copyright (C) 2009 Google Inc. All Rights Reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
*/ | |
#include "config.h" | |
#if ENABLE(WORKERS) | |
#include "Worker.h" | |
#include "DOMWindow.h" | |
#include "DocLoader.h" | |
#include "Document.h" | |
#include "EventException.h" | |
#include "EventListener.h" | |
#include "EventNames.h" | |
#include "ExceptionCode.h" | |
#include "Frame.h" | |
#include "FrameLoader.h" | |
#include "InspectorController.h" | |
#include "MessageEvent.h" | |
#include "TextEncoding.h" | |
#include "WorkerContextProxy.h" | |
#include "WorkerScriptLoader.h" | |
#include "WorkerThread.h" | |
#include <wtf/MainThread.h> | |
namespace WebCore { | |
Worker::Worker(const String& url, ScriptExecutionContext* context, ExceptionCode& ec) | |
: AbstractWorker(context) | |
, m_contextProxy(WorkerContextProxy::create(this)) | |
{ | |
KURL scriptURL = resolveURL(url, ec); | |
if (ec) | |
return; | |
m_scriptLoader = new WorkerScriptLoader(); | |
m_scriptLoader->loadAsynchronously(scriptExecutionContext(), scriptURL, DenyCrossOriginRequests, this); | |
setPendingActivity(this); // The worker context does not exist while loading, so we must ensure that the worker object is not collected, as well as its event listeners. | |
#if ENABLE(INSPECTOR) | |
if (InspectorController* inspector = scriptExecutionContext()->inspectorController()) | |
inspector->didCreateWorker(asID(), scriptURL.string(), false); | |
#endif | |
} | |
Worker::~Worker() | |
{ | |
ASSERT(isMainThread()); | |
ASSERT(scriptExecutionContext()); // The context is protected by worker context proxy, so it cannot be destroyed while a Worker exists. | |
m_contextProxy->workerObjectDestroyed(); | |
} | |
// FIXME: remove this when we update the ObjC bindings (bug #28774). | |
void Worker::postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort* port, ExceptionCode& ec) | |
{ | |
MessagePortArray ports; | |
if (port) | |
ports.append(port); | |
postMessage(message, &ports, ec); | |
} | |
void Worker::postMessage(PassRefPtr<SerializedScriptValue> message, ExceptionCode& ec) | |
{ | |
postMessage(message, static_cast<MessagePortArray*>(0), ec); | |
} | |
void Worker::postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionCode& ec) | |
{ | |
// Disentangle the port in preparation for sending it to the remote context. | |
OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(ports, ec); | |
if (ec) | |
return; | |
m_contextProxy->postMessageToWorkerContext(message, channels.release()); | |
} | |
void Worker::terminate() | |
{ | |
m_contextProxy->terminateWorkerContext(); | |
} | |
bool Worker::canSuspend() const | |
{ | |
// FIXME: It is not currently possible to suspend a worker, so pages with workers can not go into page cache. | |
return false; | |
} | |
void Worker::stop() | |
{ | |
terminate(); | |
} | |
bool Worker::hasPendingActivity() const | |
{ | |
return m_contextProxy->hasPendingActivity() || ActiveDOMObject::hasPendingActivity(); | |
} | |
void Worker::notifyFinished() | |
{ | |
if (m_scriptLoader->failed()) | |
dispatchEvent(Event::create(eventNames().errorEvent, false, true)); | |
else | |
m_contextProxy->startWorkerContext(m_scriptLoader->url(), scriptExecutionContext()->userAgent(m_scriptLoader->url()), m_scriptLoader->script()); | |
m_scriptLoader = 0; | |
unsetPendingActivity(this); | |
} | |
} // namespace WebCore | |
#endif // ENABLE(WORKERS) |