Source/core/platform/LifecycleContext.cpp

/*
 * Copyright (C) 2013 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:
 * 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
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#include "config.h"
#include "core/platform/LifecycleContext.h"

#include "core/platform/LifecycleNotifier.h"

namespace WebCore {

LifecycleContext::LifecycleContext()
{
}

LifecycleContext::~LifecycleContext()
{
}

void LifecycleContext::wasObservedBy(LifecycleObserver* observer, LifecycleObserver::Type type)
{
    lifecycleNotifier()->addObserver(observer, type);
}

void LifecycleContext::wasUnobservedBy(LifecycleObserver* observer, LifecycleObserver::Type type)
{
    lifecycleNotifier()->removeObserver(observer, type);
}

LifecycleNotifier* LifecycleContext::lifecycleNotifier()
{
    if (!m_lifecycleNotifier)
        m_lifecycleNotifier = const_cast<LifecycleContext*>(this)->createLifecycleNotifier();
    return m_lifecycleNotifier.get();
}

PassOwnPtr<LifecycleNotifier> LifecycleContext::createLifecycleNotifier()
{
    return LifecycleNotifier::create(this);
}

} // namespace WebCore