Source/core/workers/WorkerObjectProxy.h

/*
 * 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.
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 * 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
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 */

#ifndef WorkerObjectProxy_h
#define WorkerObjectProxy_h

#include "core/dom/MessagePort.h"
#include "core/workers/WorkerReportingProxy.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/PassRefPtr.h"

namespace WebCore {

    class ExecutionContext;
    class WorkerMessagingProxy;

    // A proxy to talk to the worker object. This object is created on the
    // worker object thread (i.e. usually the main thread), passed on to
    // the worker thread, and used just to proxy messages to the
    // WorkerMessagingProxy on the worker object thread.
    //
    // Used only by Dedicated Worker.
    class WorkerObjectProxy : public WorkerReportingProxy {
    public:
        static PassOwnPtr<WorkerObjectProxy> create(ExecutionContext*, WorkerMessagingProxy*);
        ~WorkerObjectProxy() { }

        void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>);

        void confirmMessageFromWorkerObject(bool hasPendingActivity);
        void reportPendingActivity(bool hasPendingActivity);

        // WorkerReportingProxy overrides.
        virtual void reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL) OVERRIDE;
        virtual void reportConsoleMessage(MessageSource, MessageLevel, const String& message, int lineNumber, const String& sourceURL) OVERRIDE;
        virtual void postMessageToPageInspector(const String&) OVERRIDE;
        virtual void updateInspectorStateCookie(const String&) OVERRIDE;
        virtual void workerGlobalScopeStarted() OVERRIDE { }
        virtual void workerGlobalScopeClosed() OVERRIDE;
        virtual void workerGlobalScopeDestroyed() OVERRIDE;

    private:
        WorkerObjectProxy(ExecutionContext*, WorkerMessagingProxy*);

        // These objects always outlive this proxy.
        ExecutionContext* m_executionContext;
        WorkerMessagingProxy* m_messagingProxy;
    };

} // namespace WebCore

#endif // WorkerObjectProxy_h