1 | /* |
2 | * Copyright (C) 2012 Apple 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 APPLE 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 "DOMWindowExtension.h" |
28 | |
29 | #include "DOMWindow.h" |
30 | #include "DOMWrapperWorld.h" |
31 | #include "Frame.h" |
32 | #include "FrameLoader.h" |
33 | #include "FrameLoaderClient.h" |
34 | #include <wtf/Ref.h> |
35 | |
36 | namespace WebCore { |
37 | |
38 | DOMWindowExtension::DOMWindowExtension(DOMWindow* window, DOMWrapperWorld& world) |
39 | : m_window(makeWeakPtr(window)) |
40 | , m_world(world) |
41 | , m_wasDetached(false) |
42 | { |
43 | ASSERT(this->frame()); |
44 | if (m_window) |
45 | m_window->registerObserver(*this); |
46 | } |
47 | |
48 | DOMWindowExtension::~DOMWindowExtension() |
49 | { |
50 | if (m_window) |
51 | m_window->unregisterObserver(*this); |
52 | } |
53 | |
54 | Frame* DOMWindowExtension::frame() const |
55 | { |
56 | return m_window ? m_window->frame() : nullptr; |
57 | } |
58 | |
59 | void DOMWindowExtension::suspendForPageCache() |
60 | { |
61 | // Calling out to the client might result in this DOMWindowExtension being destroyed |
62 | // while there is still work to do. |
63 | Ref<DOMWindowExtension> protectedThis(*this); |
64 | |
65 | auto frame = makeRef(*this->frame()); |
66 | frame->loader().client().dispatchWillDisconnectDOMWindowExtensionFromGlobalObject(this); |
67 | |
68 | m_disconnectedFrame = WTFMove(frame); |
69 | } |
70 | |
71 | void DOMWindowExtension::resumeFromPageCache() |
72 | { |
73 | ASSERT(frame()); |
74 | ASSERT(m_disconnectedFrame == frame()); |
75 | ASSERT(frame()->document()->domWindow() == m_window); |
76 | |
77 | m_disconnectedFrame = nullptr; |
78 | |
79 | frame()->loader().client().dispatchDidReconnectDOMWindowExtensionToGlobalObject(this); |
80 | } |
81 | |
82 | void DOMWindowExtension::willDestroyGlobalObjectInCachedFrame() |
83 | { |
84 | ASSERT(m_disconnectedFrame); |
85 | |
86 | // Calling out to the client might result in this DOMWindowExtension being destroyed |
87 | // while there is still work to do. |
88 | Ref<DOMWindowExtension> protectedThis(*this); |
89 | |
90 | m_disconnectedFrame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this); |
91 | m_disconnectedFrame = nullptr; |
92 | |
93 | // DOMWindowExtension lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister |
94 | // itself from any DOMWindow it is associated with if that DOMWindow is going away. |
95 | ASSERT(m_window); |
96 | if (m_window) |
97 | m_window->unregisterObserver(*this); |
98 | m_window = nullptr; |
99 | } |
100 | |
101 | void DOMWindowExtension::willDestroyGlobalObjectInFrame() |
102 | { |
103 | ASSERT(!m_disconnectedFrame); |
104 | |
105 | // Calling out to the client might result in this DOMWindowExtension being destroyed |
106 | // while there is still work to do. |
107 | Ref<DOMWindowExtension> protectedThis(*this); |
108 | |
109 | if (!m_wasDetached) { |
110 | Frame* frame = this->frame(); |
111 | ASSERT(frame); |
112 | frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this); |
113 | } |
114 | |
115 | // DOMWindowExtension lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister |
116 | // itself from any DOMWindow it is associated with if that DOMWindow is going away. |
117 | ASSERT(m_window); |
118 | if (m_window) |
119 | m_window->unregisterObserver(*this); |
120 | m_window = nullptr; |
121 | } |
122 | |
123 | void DOMWindowExtension::willDetachGlobalObjectFromFrame() |
124 | { |
125 | ASSERT(!m_disconnectedFrame); |
126 | ASSERT(!m_wasDetached); |
127 | |
128 | // Calling out to the client might result in this DOMWindowExtension being destroyed |
129 | // while there is still work to do. |
130 | Ref<DOMWindowExtension> protectedThis(*this); |
131 | |
132 | Frame* frame = this->frame(); |
133 | ASSERT(frame); |
134 | frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this); |
135 | |
136 | m_wasDetached = true; |
137 | } |
138 | |
139 | } // namespace WebCore |
140 | |