// ================================================= Helper Methods ================================================
/// <summary>
/// Determines whether the transition from lastType to type indicates a break
/// </summary>
/// <param name="lastType"> Last subword type </param>
/// <param name="type"> Current subword type </param>
/// <returns> <c>true</c> if the transition indicates a break, <c>false</c> otherwise </returns>
private bool IsBreak(int lastType, int type)
{
if ((type & lastType) != 0)
{
return(false);
}
if (!splitOnCaseChange && WordDelimiterFilter.IsAlpha(lastType) && WordDelimiterFilter.IsAlpha(type))
{
// ALPHA->ALPHA: always ignore if case isn't considered.
return(false);
}
else if (WordDelimiterFilter.IsUpper(lastType) && WordDelimiterFilter.IsAlpha(type))
{
// UPPER->letter: Don't split
return(false);
}
else if (!splitOnNumerics && ((WordDelimiterFilter.IsAlpha(lastType) && WordDelimiterFilter.IsDigit(type)) || (WordDelimiterFilter.IsDigit(lastType) && WordDelimiterFilter.IsAlpha(type))))
{
// ALPHA->NUMERIC, NUMERIC->ALPHA :Don't split
return(false);
}
return(true);
}
/// <summary>
/// Determines if the text at the given position indicates an English possessive which should be removed
/// </summary>
/// <param name="pos"> Position in the text to check if it indicates an English possessive </param>
/// <returns> <c>true</c> if the text at the position indicates an English posessive, <c>false</c> otherwise </returns>
private bool EndsWithPossessive(int pos)
{
return(stemEnglishPossessive &&
pos > 2 &&
text[pos - 2] == '\'' &&
(text[pos - 1] == 's' || text[pos - 1] == 'S') &&
WordDelimiterFilter.IsAlpha(CharType(text[pos - 3])) &&
(pos == endBounds || WordDelimiterFilter.IsSubwordDelim(CharType(text[pos]))));
}