1/*
2 * Copyright (C) 2015 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#pragma once
27
28#if ENABLE(INDEXED_DATABASE)
29
30#include "IDBCursorInfo.h"
31#include "IDBKeyData.h"
32#include "MemoryCursor.h"
33#include <wtf/Optional.h>
34
35namespace WebCore {
36namespace IDBServer {
37
38class MemoryObjectStore;
39
40class MemoryObjectStoreCursor : public MemoryCursor {
41public:
42 MemoryObjectStoreCursor(MemoryObjectStore&, const IDBCursorInfo&);
43
44 void objectStoreCleared();
45 void keyDeleted(const IDBKeyData&);
46 void keyAdded(IDBKeyDataSet::iterator);
47
48private:
49 void currentData(IDBGetResult&) final;
50 void iterate(const IDBKeyData&, const IDBKeyData& primaryKey, uint32_t count, IDBGetResult&) final;
51
52 void setFirstInRemainingRange(IDBKeyDataSet&);
53 void setForwardIteratorFromRemainingRange(IDBKeyDataSet&);
54 void setReverseIteratorFromRemainingRange(IDBKeyDataSet&);
55
56 void incrementForwardIterator(IDBKeyDataSet&, const IDBKeyData&, uint32_t count);
57 void incrementReverseIterator(IDBKeyDataSet&, const IDBKeyData&, uint32_t count);
58
59 bool hasValidPosition() const;
60
61 MemoryObjectStore& m_objectStore;
62
63 IDBKeyRangeData m_remainingRange;
64
65 Optional<IDBKeyDataSet::iterator> m_iterator;
66
67 IDBKeyData m_currentPositionKey;
68};
69
70} // namespace IDBServer
71} // namespace WebCore
72
73#endif // ENABLE(INDEXED_DATABASE)
74