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66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
/*
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* Copyright (C) 2011 Google, Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/core/frame/FrameDestructionObserver.h"
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#include "sky/engine/core/frame/LocalFrame.h"
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namespace blink {
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FrameDestructionObserver::FrameDestructionObserver(LocalFrame* frame)
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: m_frame(0)
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{
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observeFrame(frame);
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}
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FrameDestructionObserver::~FrameDestructionObserver()
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{
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observeFrame(0);
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}
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void FrameDestructionObserver::observeFrame(LocalFrame* frame)
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{
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if (m_frame)
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m_frame->removeDestructionObserver(this);
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m_frame = frame;
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if (m_frame)
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m_frame->addDestructionObserver(this);
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}
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void FrameDestructionObserver::frameDestroyed()
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{
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m_frame = 0;
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}
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void FrameDestructionObserver::willDetachFrameHost()
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{
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// Subclasses should override this function to handle this notification.
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}
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}
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