private string GetTrimmedContent()
{
int trimIndex = GetTrimIndexForContent();
if (trimIndex > 0)
{
return(CleanContent.Substring(0, trimIndex));
}
else
{
return(CleanContent);
}
}
/// <summary>
/// Gets the index to trim from for a given content line.
/// Determines the trim point as the last valid separation
/// character that fits under the length limit. If there are
/// multiple separation points on the line, the untrimmed portion
/// of the line must have more than one word in it.
/// </summary>
/// <param name="lineContent">Content of the vote line.</param>
/// <returns>Returns the index that marks where to remove further text, or 0 if none.</returns>
private int GetTrimIndexForContent()
{
// If content is less than about 8 words long, don't try to trim it.
if (CleanContent.Length < 50)
{
return(0);
}
// The furthest into the content area that we're going to allow a
// separator to be placed is 30% into the line length.
int separatorLimit = CleanContent.Length * 3 / 10;
// Colons are always allowed as separators, though it needs
// to run through a regex to be sure it's not part of a plan
// definition line, or part of an absolute path on Windows.
// Em dashes are always allowed as separators.
// Search for any instances of hyphens in the content.
// Only counts if there's a space after the hyphen, or if
// the next word starts with a capital letter.
// Select the one that comes closest to, without passing,
// the separator limit.
MatchCollection matches = extendedTextRegex.Matches(CleanContent);
// If there is only one separator, use it as long as it's within the limit.
if (matches.Count == 1)
{
Match m = matches[0];
if (m.Success && m.Index > 0 && m.Index < separatorLimit)
{
return(m.Index);
}
}
// If there's more than one separator, take the last one that fits, but
// only if there's more than one word before it.
else if (matches.Count > 1)
{
for (int i = matches.Count - 1; i >= 0; i--)
{
Match m = matches[i];
if (m.Success && m.Index > 0 && m.Index < separatorLimit)
{
string partial = CleanContent.Substring(0, m.Index);
if (CountWords(partial) > 1)
{
return(m.Index);
}
}
}
}
// Alternate trimming that reduces the vote to only the first sentence.
matches = extendedTextSentenceRegex.Matches(CleanContent);
// Sentences may be taken up to half the line length.
separatorLimit = CleanContent.Length / 2;
if (matches.Count > 0)
{
Match m = matches[0];
if (m.Success && m.Index > 0 && m.Index < separatorLimit)
{
return(m.Index + 1);
}
}
// If no proper matches were found, return 0.
return(0);
}