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