/* * 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_DISABLED , 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_DISABLED 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::willStop() { } void ActiveDOMObject::stop() { } void ActiveDOMObject::didMoveToNewExecutionContext(ExecutionContext* context) { observeContext(context); if (context->activeDOMObjectsAreStopped()) { stop(); return; } if (context->activeDOMObjectsAreSuspended()) { suspend(); return; } resume(); } } // namespace WebCore