1/*
2 * Copyright (C) 2010 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 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#include <wtf/text/WTFString.h>
29
30namespace WebCore {
31
32struct HTMLEntityTableEntry;
33
34class HTMLEntitySearch {
35public:
36 HTMLEntitySearch();
37
38 void advance(UChar);
39
40 bool isEntityPrefix() const { return !!m_first; }
41 int currentLength() const { return m_currentLength; }
42
43 const HTMLEntityTableEntry* mostRecentMatch() const { return m_mostRecentMatch; }
44
45private:
46 enum CompareResult {
47 Before,
48 Prefix,
49 After,
50 };
51
52 CompareResult compare(const HTMLEntityTableEntry*, UChar) const;
53 const HTMLEntityTableEntry* findFirst(UChar) const;
54 const HTMLEntityTableEntry* findLast(UChar) const;
55
56 void fail()
57 {
58 m_first = 0;
59 m_last = 0;
60 }
61
62 int m_currentLength;
63
64 const HTMLEntityTableEntry* m_mostRecentMatch;
65 const HTMLEntityTableEntry* m_first;
66 const HTMLEntityTableEntry* m_last;
67};
68
69} // namespace WebCore
70