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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NullExecutionContext_h
#define NullExecutionContext_h
#include "core/dom/ExecutionContext.h"
#include "core/dom/SecurityContext.h"
#include "core/events/EventQueue.h"
#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"
#include "wtf/RefCounted.h"
namespace blink {
class NullExecutionContext final : public RefCountedWillBeGarbageCollectedFinalized<NullExecutionContext>, public SecurityContext, public ExecutionContext {
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NullExecutionContext);
public:
NullExecutionContext();
virtual void disableEval(const String&) override { }
virtual String userAgent(const KURL&) const override { return String(); }
virtual void postTask(PassOwnPtr<ExecutionContextTask>) override;
virtual EventTarget* errorEventTarget() override { return 0; }
virtual EventQueue* eventQueue() const override { return m_queue.get(); }
virtual bool tasksNeedSuspension() override { return m_tasksNeedSuspension; }
void setTasksNeedSuspension(bool flag) { m_tasksNeedSuspension = flag; }
virtual void reportBlockedScriptExecutionToInspector(const String& directiveText) override { }
virtual void didUpdateSecurityOrigin() override { }
virtual SecurityContext& securityContext() override { return *this; }
double timerAlignmentInterval() const;
virtual void addConsoleMessage(PassRefPtrWillBeRawPtr<ConsoleMessage>) override { }
virtual void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) override { }
void trace(Visitor* visitor)
{
visitor->trace(m_queue);
ExecutionContext::trace(visitor);
}
#if !ENABLE(OILPAN)
using RefCounted<NullExecutionContext>::ref;
using RefCounted<NullExecutionContext>::deref;
virtual void refExecutionContext() override { ref(); }
virtual void derefExecutionContext() override { deref(); }
#endif
protected:
virtual const KURL& virtualURL() const override { return m_dummyURL; }
virtual KURL virtualCompleteURL(const String&) const override { return m_dummyURL; }
private:
bool m_tasksNeedSuspension;
OwnPtrWillBeMember<EventQueue> m_queue;
KURL m_dummyURL;
};
} // namespace blink
#endif // NullExecutionContext_h
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