/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef TypeAhead_h
#define TypeAhead_h
#include "core/dom/DOMTimeStamp.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class KeyboardEvent;
class TypeAheadDataSource {
public:
virtual ~TypeAheadDataSource() { }
virtual int indexOfSelectedOption() const = 0;
virtual int optionCount() const = 0;
virtual String optionAtIndex(int index) const = 0;
};
class TypeAhead {
public:
TypeAhead(TypeAheadDataSource*);
enum ModeFlag {
MatchPrefix = 1 << 0,
CycleFirstChar = 1 << 1,
MatchIndex = 1 << 2,
};
typedef unsigned MatchModeFlags;
// Returns the index for the matching option.
int handleEvent(KeyboardEvent*, MatchModeFlags);
private:
TypeAheadDataSource* m_dataSource;
DOMTimeStamp m_lastTypeTime;
UChar m_repeatingChar;
StringBuilder m_buffer;
};
} // namespace WebCore
#endif // TypeAhead_h