| /* |
| * 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 "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, DenyCrossOriginRedirect, 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. |
| } |
| |
| 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(); |
| } |
| |
| void Worker::postMessage(const String& message, ExceptionCode& ec) |
| { |
| postMessage(message, 0, ec); |
| } |
| |
| void Worker::postMessage(const String& message, MessagePort* messagePort, ExceptionCode& ec) |
| { |
| // Disentangle the port in preparation for sending it to the remote context. |
| OwnPtr<MessagePortChannel> channel = messagePort ? messagePort->disentangle(ec) : 0; |
| if (ec) |
| return; |
| m_contextProxy->postMessageToWorkerContext(message, channel.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()) |
| dispatchLoadErrorEvent(); |
| else |
| m_contextProxy->startWorkerContext(m_scriptLoader->url(), scriptExecutionContext()->userAgent(m_scriptLoader->url()), m_scriptLoader->script()); |
| |
| m_scriptLoader = 0; |
| |
| unsetPendingActivity(this); |
| } |
| |
| void Worker::dispatchMessage(const String& message, PassRefPtr<MessagePort> port) |
| { |
| RefPtr<Event> evt = MessageEvent::create(message, "", "", 0, port); |
| |
| if (m_onMessageListener.get()) { |
| evt->setTarget(this); |
| evt->setCurrentTarget(this); |
| m_onMessageListener->handleEvent(evt.get(), false); |
| } |
| |
| ExceptionCode ec = 0; |
| dispatchEvent(evt.release(), ec); |
| ASSERT(!ec); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WORKERS) |