blob: 331a30bde7f376efc7f7f6e6aefa2f7fd3cf2972 [file] [log] [blame]
/*
* Copyright (C) 2011 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 GOOGLE 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 "FrameDestructionObserver.h"
#include "Frame.h"
namespace WebCore {
FrameDestructionObserver::FrameDestructionObserver(Frame* frame)
: m_frame(nullptr)
{
observeFrame(frame);
}
FrameDestructionObserver::~FrameDestructionObserver()
{
observeFrame(nullptr);
}
Frame* FrameDestructionObserver::frame() const
{
return m_frame.get();
}
void FrameDestructionObserver::observeFrame(Frame* frame)
{
if (m_frame)
m_frame->removeDestructionObserver(*this);
m_frame = frame;
if (m_frame)
m_frame->addDestructionObserver(*this);
}
void FrameDestructionObserver::frameDestroyed()
{
m_frame = nullptr;
}
void FrameDestructionObserver::willDetachPage()
{
// Subclasses should override this function to handle this notification.
}
}