/// <summary>
/// Expands the token text
/// </summary>
/// <param name="table">the table used when creating the token text</param>
/// <returns>the token with the expanded</returns>
public ExpandedTokenData <StringSegment> Expand(TokenTextTable table)
{
Contract.RequiresNotNull(table);
return(!IsValid
? default(ExpandedTokenData <StringSegment>)
: new ExpandedTokenData <StringSegment>(Path, Line, Position, Text.ToString(table)));
}
/// <summary>
/// Helper method that will try to map the position in the token string to the correct original line and position in the
/// file.
/// </summary>
/// <remarks>
/// It will start with the token as line and position info. It will scan through the actual text to find the lines and
/// recomputes the location.
/// </remarks>
/// <param name="table">The table used when creating the token.</param>
/// <param name="positionInToken">The actual character position int the text of the token.</param>
/// <returns>An updated token with recomputed line information</returns>
public TokenTextData UpdateLineInformationForPosition(TokenTextTable table, int positionInToken)
{
Contract.RequiresNotNull(table);
Contract.Requires(positionInToken >= 0);
Contract.Requires(positionInToken <= Text.GetLength(table));
int line = Line;
int pos = Position;
var text = Text.ToString(table);
bool seenCr = false;
int lastPos = Math.Min(positionInToken, Text.GetLength(table) - 1);
for (int i = 0; i < lastPos; i++)
{
char c = text[i];
if (c == '\n')
{
if (!seenCr)
{
// in case of \n (not \r\n) start a new line.
line++;
pos = 0;
}
}
else if (c == '\r')
{
// in case of \r start a new line.
seenCr = true;
line++;
pos = 0;
}
else
{
seenCr = false;
pos++;
}
}
return(new TokenTextData(line, pos, Text));
}
