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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.
*
*/
#include "config.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/dom/ExecutionContext.h"
namespace WebCore {
ActiveDOMObject::ActiveDOMObject(ExecutionContext* executionContext)
: ContextLifecycleObserver(executionContext, ActiveDOMObjectType)
, m_pendingActivityCount(0)
#if ASSERT_ENABLED
, m_suspendIfNeededCalled(false)
#endif
{
ASSERT(!executionContext || executionContext->isContextThread());
}
ActiveDOMObject::~ActiveDOMObject()
{
// ActiveDOMObject may be inherited by a sub-class whose life-cycle
// exceeds that of the associated ExecutionContext. In those cases,
// m_executionContext would/should have been nullified by
// ContextLifecycleObserver::contextDestroyed() (which we implement /
// inherit). Hence, we should ensure that this is not 0 before use it
// here.
if (!executionContext())
return;
ASSERT(m_suspendIfNeededCalled);
ASSERT(executionContext()->isContextThread());
}
void ActiveDOMObject::suspendIfNeeded()
{
#if ASSERT_ENABLED
ASSERT(!m_suspendIfNeededCalled);
m_suspendIfNeededCalled = true;
#endif
if (ExecutionContext* context = executionContext())
context->suspendActiveDOMObjectIfNeeded(this);
}
bool ActiveDOMObject::hasPendingActivity() const
{
return m_pendingActivityCount;
}
void ActiveDOMObject::suspend()
{
}
void ActiveDOMObject::resume()
{
}
void ActiveDOMObject::stop()
{
}
void ActiveDOMObject::didMoveToNewExecutionContext(ExecutionContext* context)
{
observeContext(context);
if (context->activeDOMObjectsAreStopped()) {
stop();
return;
}
if (context->activeDOMObjectsAreSuspended()) {
suspend();
return;
}
resume();
}
} // namespace WebCore
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