/*
 * Copyright (C) 2010. 2012 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT
 * OWNER 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 "ActiveDOMCallback.h"

#include "ActiveDOMObject.h"
#include "ScriptExecutionContext.h"

#if ENABLE(WORKERS)
#include "WorkerContext.h"
#endif

namespace WebCore {

ActiveDOMCallback::ActiveDOMCallback(ScriptExecutionContext* context)
    : ContextDestructionObserver(context)
{
}

ActiveDOMCallback::~ActiveDOMCallback()
{
}

bool ActiveDOMCallback::canInvokeCallback() const
{
    ScriptExecutionContext* context = scriptExecutionContext();
    return context && !context->activeDOMObjectsAreSuspended() && !context->activeDOMObjectsAreStopped();
}

bool ActiveDOMCallback::isScriptControllerTerminating() const
{
#if ENABLE(WORKERS)
    ScriptExecutionContext* context = scriptExecutionContext();
    if (context && context->isWorkerContext()) {
        WorkerScriptController* scriptController = static_cast<WorkerContext*>(context)->script();
        if (!scriptController || scriptController->isExecutionForbidden() || scriptController->isExecutionTerminating())
            return true;
    }
#endif
    return false;
}

} // namespace WebCore
