blob: 6347ea204811d54a487448efe3d70fef14c65d4c [file] [log] [blame]
/*
* 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 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 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 "ActiveDOMObject.h"
#include "Document.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
static inline ScriptExecutionContext* suitableScriptExecutionContext(ScriptExecutionContext* scriptExecutionContext)
{
// For detached documents, make sure we observe their context document instead.
return is<Document>(scriptExecutionContext) ? &downcast<Document>(*scriptExecutionContext).contextDocument() : scriptExecutionContext;
}
inline ActiveDOMObject::ActiveDOMObject(ScriptExecutionContext* context, CheckedScriptExecutionContextType)
: ContextDestructionObserver(context)
{
ASSERT(!is<Document>(context) || &downcast<Document>(context)->contextDocument() == downcast<Document>(context));
if (!context)
return;
ASSERT(context->isContextThread());
context->didCreateActiveDOMObject(*this);
}
ActiveDOMObject::ActiveDOMObject(ScriptExecutionContext* scriptExecutionContext)
: ActiveDOMObject(suitableScriptExecutionContext(scriptExecutionContext), CheckedScriptExecutionContext)
{
}
ActiveDOMObject::ActiveDOMObject(Document* document)
: ActiveDOMObject(document ? &document->contextDocument() : nullptr, CheckedScriptExecutionContext)
{
}
ActiveDOMObject::ActiveDOMObject(Document& document)
: ActiveDOMObject(&document.contextDocument(), CheckedScriptExecutionContext)
{
}
ActiveDOMObject::~ActiveDOMObject()
{
ASSERT(canAccessThreadLocalDataForThread(m_creationThread));
// ActiveDOMObject may be inherited by a sub-class whose life-cycle
// exceeds that of the associated ScriptExecutionContext. In those cases,
// m_scriptExecutionContext would/should have been nullified by
// ContextDestructionObserver::contextDestroyed() (which we implement /
// inherit). Hence, we should ensure that this is not 0 before use it
// here.
if (!m_scriptExecutionContext)
return;
ASSERT(m_suspendIfNeededWasCalled);
ASSERT(m_scriptExecutionContext->isContextThread());
m_scriptExecutionContext->willDestroyActiveDOMObject(*this);
}
void ActiveDOMObject::suspendIfNeeded()
{
#if !ASSERT_DISABLED
ASSERT(!m_suspendIfNeededWasCalled);
m_suspendIfNeededWasCalled = true;
#endif
if (!m_scriptExecutionContext)
return;
m_scriptExecutionContext->suspendActiveDOMObjectIfNeeded(*this);
}
#if !ASSERT_DISABLED
void ActiveDOMObject::assertSuspendIfNeededWasCalled() const
{
ASSERT(m_suspendIfNeededWasCalled);
}
#endif
bool ActiveDOMObject::hasPendingActivity() const
{
return m_pendingActivityCount;
}
void ActiveDOMObject::suspend(ReasonForSuspension)
{
}
void ActiveDOMObject::resume()
{
}
void ActiveDOMObject::stop()
{
}
bool ActiveDOMObject::isContextStopped() const
{
return !scriptExecutionContext() || scriptExecutionContext()->activeDOMObjectsAreStopped();
}
bool ActiveDOMObject::isAllowedToRunScript() const
{
return scriptExecutionContext() && !scriptExecutionContext()->activeDOMObjectsAreStopped() && !scriptExecutionContext()->activeDOMObjectsAreSuspended();
}
} // namespace WebCore