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102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sky/engine/core/dom/ActiveDOMObject.h"
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#include "sky/engine/core/dom/ExecutionContext.h"
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namespace blink {
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ActiveDOMObject::ActiveDOMObject(ExecutionContext* executionContext)
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: ContextLifecycleObserver(executionContext, ActiveDOMObjectType)
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#if ENABLE(ASSERT)
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, m_suspendIfNeededCalled(false)
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#endif
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{
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ASSERT(!executionContext || executionContext->isContextThread());
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}
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ActiveDOMObject::~ActiveDOMObject()
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{
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// ActiveDOMObject may be inherited by a sub-class whose life-cycle
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// exceeds that of the associated ExecutionContext. In those cases,
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// m_executionContext would/should have been nullified by
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// ContextLifecycleObserver::contextDestroyed() (which we implement /
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// inherit). Hence, we should ensure that this is not 0 before use it
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// here.
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if (!executionContext())
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return;
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ASSERT(m_suspendIfNeededCalled);
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ASSERT(executionContext()->isContextThread());
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}
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void ActiveDOMObject::suspendIfNeeded()
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{
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#if ENABLE(ASSERT)
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ASSERT(!m_suspendIfNeededCalled);
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m_suspendIfNeededCalled = true;
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#endif
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if (ExecutionContext* context = executionContext())
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context->suspendActiveDOMObjectIfNeeded(this);
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}
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bool ActiveDOMObject::hasPendingActivity() const
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{
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return false;
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}
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void ActiveDOMObject::suspend()
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{
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}
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void ActiveDOMObject::resume()
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{
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}
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void ActiveDOMObject::stop()
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{
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}
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void ActiveDOMObject::didMoveToNewExecutionContext(ExecutionContext* context)
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{
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observeContext(context);
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if (context->activeDOMObjectsAreStopped()) {
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stop();
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return;
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}
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if (context->activeDOMObjectsAreSuspended()) {
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suspend();
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return;
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}
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resume();
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}
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} // namespace blink
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