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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 <wtf/HashMap.h>
#include <wtf/HashSet.h>
namespace WebCore {
class ActiveDOMObject;
class MessagePort;
class KURL;
class SecurityOrigin;
class String;
class ScriptExecutionContext {
public:
ScriptExecutionContext();
virtual ~ScriptExecutionContext();
virtual bool isDocument() const { return false; }
virtual bool isWorkerContext() const { return false; }
const KURL& url() const { return virtualURL(); }
// Active objects are not garbage collected even if inaccessible, e.g. because their activity may result in callbacks being invoked.
void stopActiveDOMObjects();
void createdActiveDOMObject(ActiveDOMObject*, void* upcastPointer);
void destroyedActiveDOMObject(ActiveDOMObject*);
const HashMap<ActiveDOMObject*, void*>& activeDOMObjects() const { return m_activeDOMObjects; }
// MessagePort is conceptually a kind of ActiveDOMObject, but it needs to be tracked separately for message dispatch, and for cross-heap GC support.
void processMessagePortMessagesSoon();
void dispatchMessagePortEvents();
void createdMessagePort(MessagePort*);
void destroyedMessagePort(MessagePort*);
const HashSet<MessagePort*>& messagePorts() const { return m_messagePorts; }
void ref() { refScriptExecutionContext(); }
void deref() { derefScriptExecutionContext(); }
private:
virtual const KURL& virtualURL() const = 0;
bool m_firedMessagePortTimer;
HashSet<MessagePort*> m_messagePorts;
HashMap<ActiveDOMObject*, void*> m_activeDOMObjects;
virtual void refScriptExecutionContext() = 0;
virtual void derefScriptExecutionContext() = 0;
};
} // namespace WebCore
#endif // ScriptExecutionContext_h
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