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