1/*
2 * Copyright (C) 2008, 2010 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27#ifndef Worker_h
28#define Worker_h
29
30#include "AbstractWorker.h"
31#include "ActiveDOMObject.h"
32#include "EventListener.h"
33#include "EventNames.h"
34#include "EventTarget.h"
35#include "MessagePort.h"
36#include "WorkerScriptLoaderClient.h"
37#include <wtf/Forward.h>
38#include <wtf/PassRefPtr.h>
39#include <wtf/RefPtr.h>
40#include <wtf/text/AtomicStringHash.h>
41
42namespace WebCore {
43
44    class ScriptExecutionContext;
45    class WorkerGlobalScopeProxy;
46    class WorkerScriptLoader;
47
48    typedef int ExceptionCode;
49
50    class Worker final : public AbstractWorker, private WorkerScriptLoaderClient {
51    public:
52        static PassRefPtr<Worker> create(ScriptExecutionContext&, const String& url, ExceptionCode&);
53        virtual ~Worker();
54
55        virtual EventTargetInterface eventTargetInterface() const override { return WorkerEventTargetInterfaceType; }
56
57        void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionCode&);
58        // Needed for Objective-C bindings (see bug 28774).
59        void postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort*, ExceptionCode&);
60
61        void terminate();
62
63        virtual bool canSuspend() const override;
64        virtual void stop() override;
65        virtual bool hasPendingActivity() const override;
66
67        DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
68
69    private:
70        explicit Worker(ScriptExecutionContext&);
71
72        void notifyNetworkStateChange(bool isOnline);
73
74        // WorkerScriptLoaderClient callbacks
75        virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) override;
76        virtual void notifyFinished() override;
77
78        friend void networkStateChanged(bool isOnLine);
79
80        RefPtr<WorkerScriptLoader> m_scriptLoader;
81        WorkerGlobalScopeProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown.
82    };
83
84} // namespace WebCore
85
86#endif // Worker_h
87