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/*
* Copyright (C) 2008 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 ScriptExecutionContext_h
#define ScriptExecutionContext_h
#include "Console.h"
#include "KURL.h"
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Threading.h>
#include <wtf/text/StringHash.h>
#if USE(JSC)
#include <runtime/JSGlobalData.h>
#endif
namespace WebCore {
class ActiveDOMObject;
class Blob;
#if ENABLE(DATABASE)
class Database;
class DatabaseTaskSynchronizer;
class DatabaseThread;
#endif
class DOMTimer;
#if ENABLE(BLOB) || ENABLE(FILE_WRITER)
class FileThread;
#endif
class MessagePort;
class SecurityOrigin;
class ScriptString;
#if ENABLE(INSPECTOR)
class InspectorController;
#endif
class ScriptExecutionContext {
public:
ScriptExecutionContext();
virtual ~ScriptExecutionContext();
virtual bool isDocument() const { return false; }
virtual bool isWorkerContext() const { return false; }
#if ENABLE(DATABASE)
virtual bool isDatabaseReadOnly() const = 0;
virtual void databaseExceededQuota(const String& name) = 0;
DatabaseThread* databaseThread();
void setHasOpenDatabases() { m_hasOpenDatabases = true; }
bool hasOpenDatabases() const { return m_hasOpenDatabases; }
// When the database cleanup is done, cleanupSync will be signalled.
void stopDatabases(DatabaseTaskSynchronizer*);
#endif
virtual bool isContextThread() const = 0;
virtual bool isJSExecutionTerminated() const = 0;
const KURL& url() const { return virtualURL(); }
KURL completeURL(const String& url) const { return virtualCompleteURL(url); }
virtual String userAgent(const KURL&) const = 0;
SecurityOrigin* securityOrigin() const { return m_securityOrigin.get(); }
#if ENABLE(INSPECTOR)
virtual InspectorController* inspectorController() const { return 0; }
#endif
virtual void reportException(const String& errorMessage, int lineNumber, const String& sourceURL) = 0;
virtual void addMessage(MessageSource, MessageType, MessageLevel, const String& message, unsigned lineNumber, const String& sourceURL) = 0;
// Active objects are not garbage collected even if inaccessible, e.g. because their activity may result in callbacks being invoked.
bool canSuspendActiveDOMObjects();
// Active objects can be asked to suspend even if canSuspendActiveDOMObjects() returns 'false' -
// step-by-step JS debugging is one example.
void suspendActiveDOMObjects();
void resumeActiveDOMObjects();
void stopActiveDOMObjects();
void createdActiveDOMObject(ActiveDOMObject*, void* upcastPointer);
void destroyedActiveDOMObject(ActiveDOMObject*);
typedef const HashMap<ActiveDOMObject*, void*> ActiveDOMObjectsMap;
ActiveDOMObjectsMap& activeDOMObjects() const { return m_activeDOMObjects; }
// MessagePort is conceptually a kind of ActiveDOMObject, but it needs to be tracked separately for message dispatch.
void processMessagePortMessagesSoon();
void dispatchMessagePortEvents();
void createdMessagePort(MessagePort*);
void destroyedMessagePort(MessagePort*);
const HashSet<MessagePort*>& messagePorts() const { return m_messagePorts; }
void ref() { refScriptExecutionContext(); }
void deref() { derefScriptExecutionContext(); }
class Task : public Noncopyable {
public:
virtual ~Task();
virtual void performTask(ScriptExecutionContext*) = 0;
// Certain tasks get marked specially so that they aren't discarded, and are executed, when the context is shutting down its message queue.
virtual bool isCleanupTask() const { return false; }
};
virtual void postTask(PassOwnPtr<Task>) = 0; // Executes the task on context's thread asynchronously.
void addTimeout(int timeoutId, DOMTimer*);
void removeTimeout(int timeoutId);
DOMTimer* findTimeout(int timeoutId);
void addBlob(Blob*);
void removeBlob(Blob*);
#if ENABLE(BLOB)
KURL createPublicBlobURL(Blob*);
void revokePublicBlobURL(const KURL&);
#endif
#if USE(JSC)
JSC::JSGlobalData* globalData();
#endif
#if ENABLE(BLOB) || ENABLE(FILE_WRITER)
FileThread* fileThread();
void stopFileThread();
#endif
protected:
// Explicitly override the security origin for this script context.
// Note: It is dangerous to change the security origin of a script context
// that already contains content.
void setSecurityOrigin(PassRefPtr<SecurityOrigin>);
private:
virtual const KURL& virtualURL() const = 0;
virtual KURL virtualCompleteURL(const String&) const = 0;
void closeMessagePorts();
RefPtr<SecurityOrigin> m_securityOrigin;
HashSet<MessagePort*> m_messagePorts;
HashMap<ActiveDOMObject*, void*> m_activeDOMObjects;
HashMap<int, DOMTimer*> m_timeouts;
HashSet<Blob*> m_blobs;
#if ENABLE(BLOB)
HashSet<String> m_publicBlobURLs;
#endif
virtual void refScriptExecutionContext() = 0;
virtual void derefScriptExecutionContext() = 0;
#if ENABLE(DATABASE)
RefPtr<DatabaseThread> m_databaseThread;
bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed.
#endif
#if ENABLE(BLOB) || ENABLE(FILE_WRITER)
RefPtr<FileThread> m_fileThread;
#endif
};
} // namespace WebCore
#endif // ScriptExecutionContext_h
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