1/*
2 * Copyright (C) 2018 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Optional.h>
29
30namespace WebCore {
31
32// Frame identifier that is unique across all WebContent processes.
33struct GlobalFrameIdentifier {
34 uint64_t pageID;
35 uint64_t frameID;
36
37 template<class Encoder> void encode(Encoder&) const;
38 template<class Decoder> static Optional<GlobalFrameIdentifier> decode(Decoder&);
39};
40
41template<class Encoder>
42void GlobalFrameIdentifier::encode(Encoder& encoder) const
43{
44 encoder << pageID << frameID;
45}
46
47template<class Decoder>
48Optional<GlobalFrameIdentifier> GlobalFrameIdentifier::decode(Decoder& decoder)
49{
50 Optional<uint64_t> pageID;
51 decoder >> pageID;
52 if (!pageID)
53 return WTF::nullopt;
54
55 Optional<uint64_t> frameID;
56 decoder >> frameID;
57 if (!frameID)
58 return WTF::nullopt;
59
60 return { { WTFMove(*pageID), WTFMove(*frameID) } };
61}
62
63} // namespace WebCore
64