/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || (tokenizer.Current != '\r' && tokenizer.Current != '\n'))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && (tokenizer.Current == '\r' || tokenizer.Current == '\n'))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.NewLine,
Result
)
{
ReplacementValue = "<WHITE_SPACE>"
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || (tokenizer.Current != '#'))
{
return(null);
}
var StartPosition = tokenizer.Index;
tokenizer.Consume();
bool HashTagFound = false;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || char.IsNumber(tokenizer.Current) || tokenizer.Current == '_'))
{
HashTagFound = true;
tokenizer.Consume();
}
if (!HashTagFound)
{
return(null);
}
var EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.HashTag,
Value = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray())
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !IsEmoji(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && IsEmoji(tokenizer.Current))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Emoji,
Result
)
{
ReplacementValue = "<SYM>"
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !char.IsLetter(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || tokenizer.Current == '\'' || tokenizer.Current == '-'))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Word,
Result
));
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || (tokenizer.Current != '@'))
{
return(null);
}
var StartPosition = tokenizer.Index;
tokenizer.Consume();
bool UsernameFound = false;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || char.IsNumber(tokenizer.Current) || tokenizer.Current == '_'))
{
UsernameFound = true;
tokenizer.Consume();
}
if (!UsernameFound)
{
return(null);
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Username,
Result
));
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || (tokenizer.Current != '.' && tokenizer.Current != '…'))
{
return(null);
}
var StartPosition = tokenizer.Index;
var EndPosition = StartPosition;
var Count = 0;
var FoundEllipsis = false;
if (tokenizer.Current == '…')
{
FoundEllipsis = true;
EndPosition = tokenizer.Index;
tokenizer.Consume();
}
else
{
while (!tokenizer.End() && (tokenizer.Current == '.' || char.IsWhiteSpace(tokenizer.Current)))
{
if (tokenizer.Current == '.')
{
++Count;
FoundEllipsis |= Count >= 3;
EndPosition = tokenizer.Index;
if (FoundEllipsis)
{
tokenizer.Consume();
break;
}
}
tokenizer.Consume();
}
}
if (!FoundEllipsis)
{
return(null);
}
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Ellipsis,
Result
)
{
ReplacementValue = "<SYM>"
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || tokenizer.Index + 8 > tokenizer.Length)
{
return(null);
}
var StartPosition = tokenizer.Index;
var TempSlice = tokenizer.Slice(StartPosition, StartPosition + 7);
if (TempSlice[0] != 'f' && TempSlice[0] != 'h' && TempSlice[0] != 's' && TempSlice[0] != 'w')
{
return(null);
}
while (!tokenizer.End() && !char.IsWhiteSpace(tokenizer.Current))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
Result = Result.StripRight(".");
tokenizer.Index = StartPosition + Result.Length;
if (!Uri.IsWellFormedUriString(Result, UriKind.RelativeOrAbsolute) ||
(!Result.StartsWith("ftp:", StringComparison.OrdinalIgnoreCase) &&
!Result.StartsWith("sftp:", StringComparison.OrdinalIgnoreCase) &&
!Result.StartsWith("http:", StringComparison.OrdinalIgnoreCase) &&
!Result.StartsWith("https:", StringComparison.OrdinalIgnoreCase) &&
!Result.StartsWith("www.", StringComparison.OrdinalIgnoreCase)))
{
return(null);
}
EndPosition = tokenizer.Index - 1;
var TempResult = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Url,
TempResult
));
}
/// <summary>
/// Consumes the numbers.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <param name="romanNumeralChars">The roman numeral chars.</param>
private static void ConsumeNumbers(TokenizableStream <char> tokenizer, HashSet <char> romanNumeralChars)
{
while (!tokenizer.End() && romanNumeralChars.Contains(tokenizer.Current))
{
tokenizer.Consume();
}
}
/// <summary>
/// Determines whether the next set of item on the stream matches this finder.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The token.</returns>
public Token IsMatch(TokenizableStream <char> stream)
{
if (stream.End())
{
return(new Token
{
StartPosition = stream.Index,
EndPosition = stream.Index,
TokenType = TokenType.EOF,
Value = string.Empty
});
}
stream.TakeSnapshot();
var Match = IsMatchImpl(stream);
if (Match == null)
{
stream.RollbackSnapshot();
}
else
{
stream.CommitSnapshot();
}
return(Match);
}
private static void ConsumeNumbers(TokenizableStream <char> tokenizer)
{
while (!tokenizer.End() && (char.IsNumber(tokenizer.Current) || tokenizer.Current == ','))
{
tokenizer.Consume();
}
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !char.IsNumber(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
ConsumeNumbers(tokenizer);
var PeekCharacter = tokenizer.Peek(1);
if (tokenizer.Current == '.' && (char.IsNumber(PeekCharacter) || PeekCharacter == ','))
{
tokenizer.Consume();
ConsumeNumbers(tokenizer);
}
var EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.Number,
Value = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray())
});
}
/// <summary>
/// Determines whether [is match implementation] [the specified tokenizer].
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns></returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !Symbols.ContainsKey(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
var Value = tokenizer.Current;
tokenizer.Consume();
var EndPosition = tokenizer.Index - 1;
var Result = new string(new char[] { Value });
return(new Token(
EndPosition,
StartPosition,
Symbols[Value],
Result
)
{
ReplacementValue = "<SYM>"
});
}
/// <summary>
/// Determines whether the next set of item on the stream matches this finder.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The token.</returns>
public Token?IsMatch(TokenizableStream <char> stream)
{
if (stream.End())
{
return(new Token(
stream.Index,
stream.Index,
TokenType.EOF,
string.Empty
));
}
stream.TakeSnapshot();
var Match = IsMatchImpl(stream);
if (Match == null)
{
stream.RollbackSnapshot();
}
else
{
stream.CommitSnapshot();
}
return(Match);
}
/// <summary>
/// Gets the next token or null if their isn't one.
/// </summary>
/// <param name="tokenizableStream">The tokenizable stream.</param>
/// <param name="tokenFinders">The token finders.</param>
/// <returns>The next token.</returns>
private static Token Next(TokenizableStream <char> tokenizableStream, IEnglishTokenFinder[] tokenFinders)
{
if (tokenizableStream.End())
{
return(null);
}
return(tokenFinders.Select(x => x.IsMatch(tokenizableStream)).FirstOrDefault(x => x != null));
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !char.IsLetter(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || char.IsNumber(tokenizer.Current) || tokenizer.Current == '-' || tokenizer.Current == '.'))
{
tokenizer.Consume();
}
if (tokenizer.Current != '@')
{
return(null);
}
tokenizer.Consume();
bool EmailFound = false;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || char.IsNumber(tokenizer.Current) || tokenizer.Current == '-' || tokenizer.Current == '.'))
{
if (tokenizer.Current == '.' && !char.IsLetter(tokenizer.Peek(1)))
{
break;
}
EmailFound |= tokenizer.Current == '.';
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
return(new Token(
EndPosition,
StartPosition,
TokenType.Email,
Result
));
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || tokenizer.Index + 8 > tokenizer.Length)
{
return(null);
}
var StartPosition = tokenizer.Index;
var TempSlice = tokenizer.Slice(StartPosition, StartPosition + 7);
if (TempSlice[0] != 'f' && TempSlice[0] != 'h' && TempSlice[0] != 's')
{
return(null);
}
while (!tokenizer.End() && !char.IsWhiteSpace(tokenizer.Current))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
Result = Result.StripRight(".");
tokenizer.Index = StartPosition + Result.Length;
if (!Uri.IsWellFormedUriString(Result, UriKind.RelativeOrAbsolute))
{
return(null);
}
EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.Url,
Value = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray())
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || tokenizer.Current != '.')
{
return(null);
}
var StartPosition = tokenizer.Index;
var EndPosition = StartPosition;
var Count = 0;
var FoundEllipsis = false;
string FinalValue = "";
while (!tokenizer.End() && (tokenizer.Current == '.' || char.IsWhiteSpace(tokenizer.Current)))
{
FinalValue += tokenizer.Current;
if (tokenizer.Current == '.')
{
++Count;
FoundEllipsis |= Count >= 3;
EndPosition = tokenizer.Index;
}
tokenizer.Consume();
}
if (!FoundEllipsis)
{
return(null);
}
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.Ellipsis,
Value = new string(FinalValue.Trim())
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || char.IsWhiteSpace(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && !char.IsWhiteSpace(tokenizer.Current))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.Other,
Value = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray())
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || (tokenizer.Current != '\r' && tokenizer.Current != '\n'))
{
return(null);
}
var StartPosition = tokenizer.Index;
while (!tokenizer.End() && (tokenizer.Current == '\r' || tokenizer.Current == '\n'))
{
tokenizer.Consume();
}
var EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = TokenType.NewLine,
Value = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray())
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !RomanNumeralCharacters.Contains(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
ConsumeNumbers(tokenizer, RomanNumeralCharacters);
if (!tokenizer.End() && char.IsLetter(tokenizer.Current))
{
return(null);
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
if (Result == "I" || !Validate(Result))
{
return(null);
}
return(new Token(
EndPosition,
StartPosition,
TokenType.Number,
Result
)
{
NormalizedValue = ConvertToNumber(Result),
ReplacementValue = "<NUMBER>"
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (!tokenizer.End() && tokenizer.Current == Character)
{
var StartPos = tokenizer.Index;
tokenizer.Consume();
var EndPos = tokenizer.Index;
return(new Token(
EndPos,
StartPos,
TokenType,
Character.ToString()
));
}
return(null);
}
/// <summary>
/// Determines whether [is match implementation] [the specified tokenizer].
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns></returns>
protected override Token IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !Symbols.ContainsKey(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
var Value = tokenizer.Current;
tokenizer.Consume();
var EndPosition = tokenizer.Index - 1;
return(new Token
{
EndPosition = EndPosition,
StartPosition = StartPosition,
TokenType = Symbols[Value],
Value = new string(new char[] { Value })
});
}
/// <summary>
/// The actual implementation of the IsMatch done by the individual classes.
/// </summary>
/// <param name="tokenizer">The tokenizer.</param>
/// <returns>The token.</returns>
protected override Token?IsMatchImpl(TokenizableStream <char> tokenizer)
{
if (tokenizer.End() || !char.IsLetter(tokenizer.Current))
{
return(null);
}
var StartPosition = tokenizer.Index;
bool CharacterFound = true;
int PeriodCount = 0;
while (CharacterFound)
{
CharacterFound = false;
while (!tokenizer.End() && (char.IsLetter(tokenizer.Current) || tokenizer.Current == '\'' || tokenizer.Current == '-'))
{
CharacterFound = true;
tokenizer.Consume();
}
if (tokenizer.Current == '.' && CharacterFound)
{
tokenizer.Consume();
++PeriodCount;
}
}
var EndPosition = tokenizer.Index - 1;
var Result = new string(tokenizer.Slice(StartPosition, EndPosition).ToArray());
if (PeriodCount > 1)
{
return(new Token(
EndPosition,
StartPosition,
TokenType.Abbreviation,
Result
));
}
var UpperResult = Result.ToUpperInvariant();
if (Result == UpperResult && Result.Length <= 4 && Result.Length > 1)
{
return(new Token(
EndPosition,
StartPosition,
TokenType.Abbreviation,
Result
));
}
if (!CommonAbbreviations.Any(x => x == UpperResult))
{
return(null);
}
return(new Token(
EndPosition,
StartPosition,
TokenType.Abbreviation,
Result
));
}
