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/*
* Copyright (C) 2008, 2009 Apple 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.
*
*/
#ifndef WorkerContext_h
#define WorkerContext_h
#if ENABLE(WORKERS)
#include "EventListener.h"
#include "EventNames.h"
#include "EventTarget.h"
#include "ScriptExecutionContext.h"
#include "WorkerScriptController.h"
#include <wtf/Assertions.h>
#include <wtf/HashMap.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/text/AtomicStringHash.h>
namespace WebCore {
class Blob;
class DOMFileSystemSync;
class DOMURL;
class Database;
class DatabaseCallback;
class DatabaseSync;
class ErrorCallback;
class FileSystemCallback;
class NotificationCenter;
class ScheduledAction;
class WorkerLocation;
class WorkerNavigator;
class WorkerThread;
class WorkerContext : public RefCounted<WorkerContext>, public ScriptExecutionContext, public EventTarget {
public:
virtual ~WorkerContext();
virtual bool isWorkerContext() const { return true; }
virtual ScriptExecutionContext* scriptExecutionContext() const;
virtual bool isSharedWorkerContext() const { return false; }
virtual bool isDedicatedWorkerContext() const { return false; }
const KURL& url() const { return m_url; }
KURL completeURL(const String&) const;
virtual String userAgent(const KURL&) const;
WorkerScriptController* script() { return m_script.get(); }
void clearScript() { m_script.clear(); }
WorkerThread* thread() const { return m_thread; }
bool hasPendingActivity() const;
virtual void postTask(PassOwnPtr<Task>); // Executes the task on context's thread asynchronously.
// WorkerGlobalScope
WorkerContext* self() { return this; }
WorkerLocation* location() const;
void close();
DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
// WorkerUtils
virtual void importScripts(const Vector<String>& urls, ExceptionCode&);
WorkerNavigator* navigator() const;
// Timers
int setTimeout(PassOwnPtr<ScheduledAction>, int timeout);
void clearTimeout(int timeoutId);
int setInterval(PassOwnPtr<ScheduledAction>, int timeout);
void clearInterval(int timeoutId);
// ScriptExecutionContext
virtual void addMessage(MessageSource, MessageType, MessageLevel, const String& message, unsigned lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack>);
#if ENABLE(NOTIFICATIONS)
NotificationCenter* webkitNotifications() const;
#endif
#if ENABLE(DATABASE)
// HTML 5 client-side database
PassRefPtr<Database> openDatabase(const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback, ExceptionCode&);
PassRefPtr<DatabaseSync> openDatabaseSync(const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback, ExceptionCode&);
// Not implemented yet.
virtual bool allowDatabaseAccess() const { return true; }
// Not implemented for real yet.
virtual void databaseExceededQuota(const String&);
#endif
virtual bool isContextThread() const;
virtual bool isJSExecutionTerminated() const;
#if ENABLE(BLOB)
DOMURL* webkitURL() const;
#endif
#if ENABLE(FILE_SYSTEM)
enum FileSystemType {
TEMPORARY,
PERSISTENT,
};
void requestFileSystem(int type, long long size, PassRefPtr<FileSystemCallback>, PassRefPtr<ErrorCallback>);
PassRefPtr<DOMFileSystemSync> requestFileSystemSync(int type, long long size, ExceptionCode&);
#endif
// These methods are used for GC marking. See JSWorkerContext::markChildren(MarkStack&) in
// JSWorkerContextCustom.cpp.
WorkerNavigator* optionalNavigator() const { return m_navigator.get(); }
WorkerLocation* optionalLocation() const { return m_location.get(); }
using RefCounted<WorkerContext>::ref;
using RefCounted<WorkerContext>::deref;
bool isClosing() { return m_closing; }
// An observer interface to be notified when the worker thread is getting stopped.
class Observer {
WTF_MAKE_NONCOPYABLE(Observer);
public:
Observer(WorkerContext*);
virtual ~Observer();
virtual void notifyStop() = 0;
void stopObserving();
private:
WorkerContext* m_context;
};
friend class Observer;
void registerObserver(Observer*);
void unregisterObserver(Observer*);
void notifyObserversOfStop();
protected:
WorkerContext(const KURL&, const String&, WorkerThread*);
private:
virtual void refScriptExecutionContext() { ref(); }
virtual void derefScriptExecutionContext() { deref(); }
virtual void refEventTarget() { ref(); }
virtual void derefEventTarget() { deref(); }
virtual EventTargetData* eventTargetData();
virtual EventTargetData* ensureEventTargetData();
virtual const KURL& virtualURL() const;
virtual KURL virtualCompleteURL(const String&) const;
virtual EventTarget* errorEventTarget();
virtual void logExceptionToConsole(const String& errorMessage, int lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack>);
KURL m_url;
String m_userAgent;
mutable RefPtr<WorkerLocation> m_location;
mutable RefPtr<WorkerNavigator> m_navigator;
OwnPtr<WorkerScriptController> m_script;
WorkerThread* m_thread;
#if ENABLE_NOTIFICATIONS
mutable RefPtr<NotificationCenter> m_notifications;
#endif
#if ENABLE(BLOB)
mutable RefPtr<DOMURL> m_domURL;
#endif
bool m_closing;
EventTargetData m_eventTargetData;
HashSet<Observer*> m_workerObservers;
};
} // namespace WebCore
#endif // ENABLE(WORKERS)
#endif // WorkerContext_h
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