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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/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
namespace WebCore {
class ActiveDOMObject;
class DOMTimer;
class MessagePort;
class SecurityOrigin;
class ScriptString;
class String;
enum MessageDestination {
#if ENABLE(INSPECTOR)
InspectorControllerDestination,
#endif
ConsoleDestination,
};
class ScriptExecutionContext {
public:
ScriptExecutionContext();
virtual ~ScriptExecutionContext();
virtual bool isDocument() const { return false; }
virtual bool isWorkerContext() const { return false; }
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(); }
virtual void reportException(const String& errorMessage, int lineNumber, const String& sourceURL) = 0;
virtual void addMessage(MessageDestination, MessageSource, MessageType, MessageLevel, const String& message, unsigned lineNumber, const String& sourceURL) = 0;
virtual void resourceRetrievedByXMLHttpRequest(unsigned long identifier, const ScriptString& sourceString) = 0;
virtual void scriptImported(unsigned long, const String&) = 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 ThreadSafeShared<Task> {
public:
virtual ~Task();
virtual void performTask(ScriptExecutionContext*) = 0;
};
virtual void postTask(PassRefPtr<Task>) = 0; // Executes the task on context's thread asynchronously.
void addTimeout(int timeoutId, DOMTimer*);
void removeTimeout(int timeoutId);
DOMTimer* findTimeout(int timeoutId);
#if USE(JSC)
JSC::JSGlobalData* globalData();
#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;
RefPtr<SecurityOrigin> m_securityOrigin;
HashSet<MessagePort*> m_messagePorts;
HashMap<ActiveDOMObject*, void*> m_activeDOMObjects;
HashMap<int, DOMTimer*> m_timeouts;
virtual void refScriptExecutionContext() = 0;
virtual void derefScriptExecutionContext() = 0;
};
} // namespace WebCore
#endif // ScriptExecutionContext_h
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