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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
* Copyright (C) 2012 Google 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 "ActiveDOMObject.h"
#include "ConsoleTypes.h"
#include "KURL.h"
#include "SecurityContext.h"
#include "Supplementable.h"
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/Noncopyable.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Threading.h>
#include <wtf/text/StringHash.h>
#if USE(JSC)
#include <runtime/JSGlobalData.h>
#endif
namespace WebCore {
class DOMTimer;
class EventListener;
class EventQueue;
class EventTarget;
class MessagePort;
class ScriptCallStack;
#if ENABLE(BLOB)
class PublicURLManager;
#endif
#if ENABLE(BLOB)
class FileThread;
#endif
class ScriptExecutionContext : public SecurityContext, public Supplementable<ScriptExecutionContext> {
public:
ScriptExecutionContext();
virtual ~ScriptExecutionContext();
virtual bool isDocument() const { return false; }
virtual bool isWorkerContext() const { return false; }
virtual bool isContextThread() const { return true; }
virtual bool isJSExecutionForbidden() const = 0;
const KURL& url() const { return virtualURL(); }
KURL completeURL(const String& url) const { return virtualCompleteURL(url); }
virtual String userAgent(const KURL&) const = 0;
virtual void disableEval() = 0;
bool sanitizeScriptError(String& errorMessage, int& lineNumber, String& sourceURL);
void reportException(const String& errorMessage, int lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack>);
void addConsoleMessage(MessageSource, MessageType, MessageLevel, const String& message, const String& sourceURL = String(), unsigned lineNumber = 0, PassRefPtr<ScriptCallStack> = 0);
void addConsoleMessage(MessageSource, MessageType, MessageLevel, const String& message, PassRefPtr<ScriptCallStack>);
#if ENABLE(BLOB)
PublicURLManager& publicURLManager();
#endif
// 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.
virtual void suspendActiveDOMObjects(ActiveDOMObject::ReasonForSuspension);
virtual void resumeActiveDOMObjects();
virtual void stopActiveDOMObjects();
bool activeDOMObjectsAreSuspended() const { return m_activeDOMObjectsAreSuspended; }
bool activeDOMObjectsAreStopped() const { return m_activeDOMObjectsAreStopped; }
// Called from the constructor and destructors of ActiveDOMObject.
void didCreateActiveDOMObject(ActiveDOMObject*, void* upcastPointer);
void willDestroyActiveDOMObject(ActiveDOMObject*);
// Called after the construction of an ActiveDOMObject to synchronize suspend state.
void suspendActiveDOMObjectIfNeeded(ActiveDOMObject*);
typedef const HashMap<ActiveDOMObject*, void*> ActiveDOMObjectsMap;
ActiveDOMObjectsMap& activeDOMObjects() const { return m_activeDOMObjects; }
void didCreateDestructionObserver(ContextDestructionObserver*);
void willDestroyDestructionObserver(ContextDestructionObserver*);
virtual void suspendScriptedAnimationControllerCallbacks() { }
virtual void resumeScriptedAnimationControllerCallbacks() { }
// 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 {
WTF_MAKE_NONCOPYABLE(Task);
WTF_MAKE_FAST_ALLOCATED;
public:
Task() { }
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);
#if USE(JSC)
JSC::JSGlobalData* globalData();
#endif
#if ENABLE(BLOB)
FileThread* fileThread();
void stopFileThread();
#endif
// Interval is in seconds.
void adjustMinimumTimerInterval(double oldMinimumTimerInterval);
virtual double minimumTimerInterval() const;
virtual EventQueue* eventQueue() const = 0;
protected:
class AddConsoleMessageTask : public Task {
public:
static PassOwnPtr<AddConsoleMessageTask> create(MessageSource source, MessageType type, MessageLevel level, const String& message)
{
return adoptPtr(new AddConsoleMessageTask(source, type, level, message));
}
virtual void performTask(ScriptExecutionContext*);
private:
AddConsoleMessageTask(MessageSource source, MessageType type, MessageLevel level, const String& message)
: m_source(source)
, m_type(type)
, m_level(level)
, m_message(message.isolatedCopy())
{
}
MessageSource m_source;
MessageType m_type;
MessageLevel m_level;
String m_message;
};
private:
virtual const KURL& virtualURL() const = 0;
virtual KURL virtualCompleteURL(const String&) const = 0;
virtual void addMessage(MessageSource, MessageType, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtr<ScriptCallStack>) = 0;
virtual EventTarget* errorEventTarget() = 0;
virtual void logExceptionToConsole(const String& errorMessage, const String& sourceURL, int lineNumber, PassRefPtr<ScriptCallStack>) = 0;
bool dispatchErrorEvent(const String& errorMessage, int lineNumber, const String& sourceURL);
void closeMessagePorts();
HashSet<MessagePort*> m_messagePorts;
HashSet<ContextDestructionObserver*> m_destructionObservers;
HashMap<ActiveDOMObject*, void*> m_activeDOMObjects;
bool m_iteratingActiveDOMObjects;
bool m_inDestructor;
typedef HashMap<int, DOMTimer*> TimeoutMap;
TimeoutMap m_timeouts;
virtual void refScriptExecutionContext() = 0;
virtual void derefScriptExecutionContext() = 0;
bool m_inDispatchErrorEvent;
class PendingException;
OwnPtr<Vector<OwnPtr<PendingException> > > m_pendingExceptions;
#if ENABLE(BLOB)
OwnPtr<PublicURLManager> m_publicURLManager;
#endif
bool m_activeDOMObjectsAreSuspended;
ActiveDOMObject::ReasonForSuspension m_reasonForSuspendingActiveDOMObjects;
bool m_activeDOMObjectsAreStopped;
#if ENABLE(BLOB)
RefPtr<FileThread> m_fileThread;
#endif
};
} // namespace WebCore
#endif // ScriptExecutionContext_h
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