public void SendKey(Char key)
{
key = Char.ToLower(key);
if(_currentSearchScope != null) {
_currentSearchScope = _currentSearchScope.Next(key) ;
if(_currentSearchScope != null) {
_buffer.Append(key);
} else {
_buffer.Clear();
if (_topLevelLetters.ContainsKey(key)) {
_currentSearchScope = _topLevelLetters[key];
if (_currentSearchScope != null) {
_buffer.Append(key);
}
}
}
} else {
if (_topLevelLetters.ContainsKey(key)) {
_buffer.Append(key);
_currentSearchScope = _topLevelLetters[key];
}
}
if(_currentSearchScope != null &&
_currentSearchScope.IsWordEnd()) {
_wordEntered.OnNext(_buffer.ToString());
_buffer = new StringBuilder();
_currentSearchScope = null;
}
}
public LetterNode AddChild(Char letter)
{
if (_nextLetters.ContainsKey(letter)) {
return _nextLetters[letter];
} else {
var n = new LetterNode(letter);
_nextLetters.Add(letter, n);
return n;
}
}
public void AddWord(string word)
{
LetterNode start;
var firstLetter = Char.ToLower(word[0]);
if(_topLevelLetters.ContainsKey(firstLetter)) {
start = _topLevelLetters[firstLetter];
} else {
start = new LetterNode(firstLetter);
_topLevelLetters.Add(firstLetter, start);
}
foreach(var letter in word.Skip(1)) {
var newNode = start.AddChild(Char.ToLower(letter));
start = newNode;
}
}
