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 "core/frame/DOMWindowProperty.h" 29 30#include "core/frame/LocalDOMWindow.h" 31#include "core/frame/LocalFrame.h" 32 33namespace blink { 34 35DOMWindowProperty::DOMWindowProperty(LocalFrame* frame) 36 : m_frame(frame) 37#if !ENABLE(OILPAN) 38 , m_associatedDOMWindow(nullptr) 39#endif 40{ 41 // FIXME: For now it *is* acceptable for a DOMWindowProperty to be created with a null frame. 42 // See fast/dom/navigator-detached-no-crash.html for the recipe. 43 // We should fix that. <rdar://problem/11567132> 44 if (m_frame) { 45#if ENABLE(OILPAN) 46 m_frame->domWindow()->registerProperty(this); 47#else 48 m_associatedDOMWindow = m_frame->domWindow(); 49 m_associatedDOMWindow->registerProperty(this); 50#endif 51 } 52} 53 54#if !ENABLE(OILPAN) 55DOMWindowProperty::~DOMWindowProperty() 56{ 57 if (m_associatedDOMWindow) 58 m_associatedDOMWindow->unregisterProperty(this); 59} 60#endif 61 62void DOMWindowProperty::willDestroyGlobalObjectInFrame() 63{ 64 // If the property is getting this callback it must have been 65 // created with a LocalFrame and it should still have it. 66 ASSERT(m_frame); 67 m_frame = nullptr; 68 69#if !ENABLE(OILPAN) 70 // LocalDOMWindow will along with notifying DOMWindowProperty objects of 71 // impending destruction, unilaterally clear out its registered set. 72 // Consequently, no explicit unregisteration required by DOMWindowProperty; 73 // here or when destructed. 74 ASSERT(m_associatedDOMWindow); 75 m_associatedDOMWindow = nullptr; 76#endif 77} 78 79void DOMWindowProperty::willDetachGlobalObjectFromFrame() 80{ 81 // If the property is getting this callback it must have been 82 // created with a LocalFrame and it should still have it. 83 ASSERT(m_frame); 84#if !ENABLE(OILPAN) 85 // Ditto for its associated LocalDOMWindow. 86 ASSERT(m_associatedDOMWindow); 87#endif 88} 89 90void DOMWindowProperty::trace(Visitor* visitor) 91{ 92 visitor->trace(m_frame); 93} 94 95} // namespace blink 96