72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/*
|
|
* 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 = makeWeakPtr(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.
|
|
}
|
|
|
|
}
|