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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 #ifndef FrameDestructionObserver_h | |
27 #define FrameDestructionObserver_h | |
28 | |
29 #include "core/CoreExport.h" | |
30 #include "core/frame/LocalFrame.h" | |
31 #include "platform/LifecycleObserver.h" | |
32 #include "platform/heap/Handle.h" | |
33 | |
34 namespace blink { | |
35 | |
36 class LocalFrame; | |
37 class LocalFrameLifecycleNotifier; | |
38 | |
39 class CORE_EXPORT FrameDestructionObserver : public LifecycleObserver<LocalFrame
, FrameDestructionObserver, LocalFrameLifecycleNotifier> { | |
40 public: | |
41 virtual void willDetachFrameHost() { } | |
42 virtual void contextDestroyed() | |
43 { | |
44 setContext(nullptr); | |
45 } | |
46 | |
47 LocalFrame* frame() const { return lifecycleContext(); } | |
48 | |
49 protected: | |
50 explicit FrameDestructionObserver(LocalFrame* frame) | |
51 : LifecycleObserver(frame) | |
52 { | |
53 } | |
54 }; | |
55 | |
56 } // namespace blink | |
57 | |
58 #endif // FrameDestructionObserver_h | |
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