1/*
2 * Copyright (C) 2013 University of Washington. All rights reserved.
3 * Copyright (C) 2014 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 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
16 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
18 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "config.h"
29#include "ReplayingInputCursor.h"
30
31#if ENABLE(WEB_REPLAY)
32
33#include "EventLoopInputDispatcher.h"
34#include "SegmentedInputStorage.h"
35#include "SerializationMethods.h"
36#include "WebReplayInputs.h"
37#include <wtf/text/CString.h>
38
39namespace WebCore {
40
41ReplayingInputCursor::ReplayingInputCursor(SegmentedInputStorage& storage, Page& page, EventLoopInputDispatcherClient* client)
42    : m_storage(storage)
43    , m_dispatcher(std::make_unique<EventLoopInputDispatcher>(page, *this, client))
44{
45    for (size_t i = 0; i < static_cast<size_t>(InputQueue::Count); i++)
46        m_positions.append(0);
47}
48
49ReplayingInputCursor::~ReplayingInputCursor()
50{
51}
52
53PassRefPtr<ReplayingInputCursor> ReplayingInputCursor::create(SegmentedInputStorage& storage, Page& page, EventLoopInputDispatcherClient* client)
54{
55    return adoptRef(new ReplayingInputCursor(storage, page, client));
56}
57
58void ReplayingInputCursor::storeInput(std::unique_ptr<NondeterministicInputBase>)
59{
60    // Cannot store inputs from a replaying input cursor.
61    ASSERT_NOT_REACHED();
62}
63
64NondeterministicInputBase* ReplayingInputCursor::loadInput(InputQueue queue, const AtomicString& type)
65{
66    NondeterministicInputBase* input = uncheckedLoadInput(queue);
67
68    if (input->type() != type) {
69        LOG_ERROR("%-25s ERROR: Expected replay input of type %s, but got type %s\n", "[ReplayingInputCursor]", type.string().ascii().data(), input->type().string().ascii().data());
70        return nullptr;
71    }
72
73    return input;
74}
75
76NondeterministicInputBase* ReplayingInputCursor::uncheckedLoadInput(InputQueue queue)
77{
78    if (m_positions[static_cast<size_t>(queue)] >= m_storage.queueSize(queue)) {
79        String queueString = EncodingTraits<InputQueue>::encodeValue(queue).convertTo<String>();
80        LOG_ERROR("%-30s ERROR No more inputs remain for determinism queue %s, but one was requested.", "[ReplayingInputCursor]", queueString.ascii().data());
81        return nullptr;
82    }
83
84    return m_storage.load(queue, m_positions[static_cast<size_t>(queue)]++);
85}
86
87}; // namespace WebCore
88
89#endif // ENABLE(WEB_REPLAY)
90