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 #ifndef TypeAhead_h 27 #define TypeAhead_h 28 29 #include "core/dom/DOMTimeStamp.h" 30 #include "wtf/text/StringBuilder.h" 31 #include "wtf/text/WTFString.h" 32 33 namespace WebCore { 34 35 class KeyboardEvent; 36 37 class TypeAheadDataSource { 38 public: ~TypeAheadDataSource()39 virtual ~TypeAheadDataSource() { } 40 41 virtual int indexOfSelectedOption() const = 0; 42 virtual int optionCount() const = 0; 43 virtual String optionAtIndex(int index) const = 0; 44 }; 45 46 class TypeAhead { 47 public: 48 TypeAhead(TypeAheadDataSource*); 49 50 enum ModeFlag { 51 MatchPrefix = 1 << 0, 52 CycleFirstChar = 1 << 1, 53 MatchIndex = 1 << 2, 54 }; 55 typedef unsigned MatchModeFlags; 56 57 // Returns the index for the matching option. 58 int handleEvent(KeyboardEvent*, MatchModeFlags); 59 60 private: 61 TypeAheadDataSource* m_dataSource; 62 DOMTimeStamp m_lastTypeTime; 63 UChar m_repeatingChar; 64 StringBuilder m_buffer; 65 }; 66 67 } // namespace WebCore 68 69 #endif // TypeAhead_h 70