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/*
* 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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.
*/
#ifndef WebWorkerImpl_h
#define WebWorkerImpl_h
#include "WebWorker.h"
#if ENABLE(WORKERS)
#include "ScriptExecutionContext.h"
#include "WorkerLoaderProxy.h"
#include "WorkerObjectProxy.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class WorkerThread;
}
namespace WebKit {
class WebView;
// This class is used by the worker process code to talk to the WebCore::Worker
// implementation. It can't use it directly since it uses WebKit types, so this
// class converts the data types. When the WebCore::Worker object wants to call
// WebCore::WorkerObjectProxy, this class will conver to Chrome data types first
// and then call the supplied WebWorkerClient.
class WebWorkerImpl : public WebCore::WorkerObjectProxy
, public WebCore::WorkerLoaderProxy
, public WebWorker {
public:
explicit WebWorkerImpl(WebWorkerClient* client);
// WebCore::WorkerObjectProxy methods:
virtual void postMessageToWorkerObject(
PassRefPtr<WebCore::SerializedScriptValue>,
PassOwnPtr<WebCore::MessagePortChannelArray>);
virtual void postExceptionToWorkerObject(
const WebCore::String&, int, const WebCore::String&);
virtual void postConsoleMessageToWorkerObject(
WebCore::MessageDestination, WebCore::MessageSource, WebCore::MessageType,
WebCore::MessageLevel, const WebCore::String&, int, const WebCore::String&);
virtual void confirmMessageFromWorkerObject(bool);
virtual void reportPendingActivity(bool);
virtual void workerContextDestroyed();
// WebCore::WorkerLoaderProxy methods:
virtual void postTaskToLoader(PassRefPtr<WebCore::ScriptExecutionContext::Task>);
virtual void postTaskForModeToWorkerContext(
PassRefPtr<WebCore::ScriptExecutionContext::Task>, const WebCore::String& mode);
// WebWorker methods:
virtual void startWorkerContext(const WebURL&, const WebString&, const WebString&);
virtual void terminateWorkerContext();
virtual void postMessageToWorkerContext(const WebString&, const WebMessagePortChannelArray&);
virtual void workerObjectDestroyed();
virtual void clientDestroyed();
WebWorkerClient* client() {return m_client;}
// Executes the given task on the main thread.
static void dispatchTaskToMainThread(PassRefPtr<WebCore::ScriptExecutionContext::Task>);
private:
virtual ~WebWorkerImpl();
// Tasks that are run on the worker thread.
static void postMessageToWorkerContextTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
const WebCore::String& message,
PassOwnPtr<WebCore::MessagePortChannelArray> channels);
// Function used to invoke tasks on the main thread.
static void invokeTaskMethod(void*);
// Tasks that are run on the main thread.
static void postMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
WebCore::String message,
PassOwnPtr<WebCore::MessagePortChannelArray> channels);
static void postExceptionTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
const WebCore::String& message,
int lineNumber,
const WebCore::String& sourceURL);
static void postConsoleMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
int destination,
int source,
int type,
int level,
const WebCore::String& message,
int lineNumber,
const WebCore::String& sourceURL);
static void confirmMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
bool hasPendingActivity);
static void reportPendingActivityTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr,
bool hasPendingActivity);
static void workerContextDestroyedTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* thisPtr);
WebWorkerClient* m_client;
// 'shadow page' - created to proxy loading requests from the worker.
RefPtr<WebCore::ScriptExecutionContext> m_loadingDocument;
WebView* m_webView;
bool m_askedToTerminate;
RefPtr<WebCore::WorkerThread> m_workerThread;
};
} // namespace WebKit
#endif // ENABLE(WORKERS)
#endif
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