public static Token GetTokenForTermInsertion(this TolerantTokenizer tokenizer, int caret)
{
tokenizer.Parse();
var tokens = tokenizer.Tokens;
var token =
tokens.FirstOrDefault(_ => _.OverlapsCaret(caret)) ??
tokens.LastOrDefault(_ => _.IsLeftToCaret(caret));
if (token == null)
{
return(tokenOnEmptyInput(tokens, caret: 0));
}
var current = token;
while (true)
{
if (!current.IsPhrase && string.IsNullOrEmpty(current.NextTokenField))
{
return(tokenOnEmptyInput(tokens, current.Position + current.Value.Length));
}
current = current.Next;
if (current == null)
{
return(tokenOnEmptyInput(tokens, caret: 0));
}
}
}
public static Token GetEditedToken(string query, int caret)
{
var tokenizer = new TolerantTokenizer(query);
tokenizer.Parse();
var tokens = tokenizer.Tokens;
var overllapingToken = tokens.FirstOrDefault(_ => _.OverlapsCaret(caret));
if (overllapingToken != null)
{
return(overllapingToken);
}
var leftToken = tokens.LastOrDefault(_ => _.IsLeftToCaret(caret));
var rightToken = tokens.FirstOrDefault(_ => _.IsRightToCaret(caret));
if (leftToken?.IsConnectedToCaret(caret) != true && rightToken?.IsConnectedToCaret(caret) == true)
{
return(rightToken);
}
if (leftToken?.Type.IsAny(TokenType.Modifier) == true && leftToken.TouchesCaret(caret))
{
return(new Token(caret, string.Empty, TokenType.ModifierValue, leftToken.ParentField));
}
if (leftToken?.TouchesCaret(caret) == true)
{
if (leftToken.Type.IsAny(TokenType.Field | TokenType.FieldValue | TokenType.Modifier))
{
return(leftToken);
}
if (leftToken.Type.IsAny(TokenType.Boolean) && leftToken.Value.Length > 1)
{
return(leftToken);
}
return(tokenOnEmptyInput(tokens, caret, leftToken.NextTokenField));
}
return(tokenOnEmptyInput(tokens, caret, leftToken?.NextTokenField));
}
public static Token GetTokenForArbitraryInsertion(this TolerantTokenizer tokenizer, int caret)
{
tokenizer.Parse();
var tokens = tokenizer.Tokens;
var overlappingToken = tokens.FirstOrDefault(_ => _.OverlapsCaret(caret));
if (overlappingToken != null)
{
return(tokenOnEmptyInput(tokens, overlappingToken.Position + overlappingToken.Value.Length));
}
var leftToken = tokens.LastOrDefault(_ => _.IsLeftToCaret(caret));
if (leftToken == null)
{
return(tokenOnEmptyInput(tokens, caret: 0));
}
return(tokenOnEmptyInput(tokens, caret));
}