1/*
2 * Copyright (C) 2012 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. AND ITS CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/MonotonicTime.h>
29#include <wtf/text/StringBuilder.h>
30#include <wtf/text/WTFString.h>
31
32namespace WebCore {
33
34class KeyboardEvent;
35
36class TypeAheadDataSource {
37public:
38 virtual ~TypeAheadDataSource() = default;
39
40 virtual int indexOfSelectedOption() const = 0;
41 virtual int optionCount() const = 0;
42 virtual String optionAtIndex(int index) const = 0;
43};
44
45class TypeAhead {
46public:
47 TypeAhead(TypeAheadDataSource*);
48
49 enum ModeFlag {
50 MatchPrefix = 1 << 0,
51 CycleFirstChar = 1 << 1,
52 MatchIndex = 1 << 2,
53 };
54 typedef unsigned MatchModeFlags;
55
56 // Returns the index for the matching option.
57 int handleEvent(KeyboardEvent*, MatchModeFlags);
58
59private:
60 TypeAheadDataSource* m_dataSource;
61 MonotonicTime m_lastTypeTime;
62 UChar m_repeatingChar;
63 StringBuilder m_buffer;
64};
65
66} // namespace WebCore
67