1/* 2 * Copyright (C) 2011 Google, Inc. All Rights Reserved. 3 * Copyright (C) 2012 Apple Inc. All Rights Reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "config.h" 28#include "DOMWindowProperty.h" 29 30#include "DOMWindow.h" 31#include "Document.h" 32#include "Frame.h" 33 34namespace WebCore { 35 36DOMWindowProperty::DOMWindowProperty(Frame* frame) 37 : m_frame(frame) 38 , m_associatedDOMWindow(0) 39{ 40 // FIXME: For now it *is* acceptable for a DOMWindowProperty to be created with a null frame. 41 // See fast/dom/navigator-detached-no-crash.html for the recipe. 42 // We should fix that. <rdar://problem/11567132> 43 if (m_frame) { 44 m_associatedDOMWindow = m_frame->document()->domWindow(); 45 m_associatedDOMWindow->registerProperty(this); 46 } 47} 48 49DOMWindowProperty::~DOMWindowProperty() 50{ 51 if (m_associatedDOMWindow) 52 m_associatedDOMWindow->unregisterProperty(this); 53 54 m_associatedDOMWindow = 0; 55 m_frame = 0; 56} 57 58void DOMWindowProperty::disconnectFrameForPageCache() 59{ 60 // If this property is being disconnected from its Frame to enter the PageCache, it must have 61 // been created with a Frame in the first place. 62 ASSERT(m_frame); 63 ASSERT(m_associatedDOMWindow); 64 65 m_frame = 0; 66} 67 68void DOMWindowProperty::reconnectFrameFromPageCache(Frame* frame) 69{ 70 // If this property is being reconnected to its Frame to enter the PageCache, it must have 71 // been disconnected from its Frame in the first place and it should still have an associated DOMWindow. 72 ASSERT(frame); 73 ASSERT(!m_frame); 74 ASSERT(frame->document()->domWindow() == m_associatedDOMWindow); 75 76 m_frame = frame; 77} 78 79void DOMWindowProperty::willDestroyGlobalObjectInCachedFrame() 80{ 81 // If the property has been disconnected from its Frame for the page cache, then it must have originally had a Frame 82 // and therefore should still have an associated DOMWindow. 83 ASSERT(!m_frame); 84 ASSERT(m_associatedDOMWindow); 85 86 // DOMWindowProperty lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister 87 // itself from any DOMWindow it is associated with if that DOMWindow is going away. 88 if (m_associatedDOMWindow) 89 m_associatedDOMWindow->unregisterProperty(this); 90 m_associatedDOMWindow = 0; 91 m_frame = 0; 92} 93 94void DOMWindowProperty::willDestroyGlobalObjectInFrame() 95{ 96 // If the property is getting this callback it must have been created with a Frame/DOMWindow and it should still have them. 97 ASSERT(m_frame); 98 ASSERT(m_associatedDOMWindow); 99 100 // DOMWindowProperty lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister 101 // itself from any DOMWindow it is associated with if that DOMWindow is going away. 102 if (m_associatedDOMWindow) 103 m_associatedDOMWindow->unregisterProperty(this); 104 m_associatedDOMWindow = 0; 105 m_frame = 0; 106} 107 108void DOMWindowProperty::willDetachGlobalObjectFromFrame() 109{ 110 // If the property is getting this callback it must have been created with a Frame/DOMWindow and it should still have them. 111 ASSERT(m_frame); 112 ASSERT(m_associatedDOMWindow); 113} 114 115} 116