1/* 2 * Copyright (C) 2011 Google, Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "FrameDestructionObserver.h" 28 29#include "Frame.h" 30 31namespace WebCore { 32 33FrameDestructionObserver::FrameDestructionObserver(Frame* frame) 34 : m_frame(0) 35{ 36 observeFrame(frame); 37} 38 39FrameDestructionObserver::~FrameDestructionObserver() 40{ 41 observeFrame(0); 42 43} 44 45void FrameDestructionObserver::observeFrame(Frame* frame) 46{ 47 if (m_frame) 48 m_frame->removeDestructionObserver(this); 49 50 m_frame = frame; 51 52 if (m_frame) 53 m_frame->addDestructionObserver(this); 54} 55 56void FrameDestructionObserver::frameDestroyed() 57{ 58 m_frame = 0; 59} 60 61void FrameDestructionObserver::willDetachPage() 62{ 63 // Subclasses should override this function to handle this notification. 64} 65 66} 67