public int Find(string pattern, int startAt, FastFindMode mode, bool matchCase,
FastFindDirection direction = FastFindDirection.Forward)
{
if (mode == FastFindMode.Contains)
{
StringComparison SC = matchCase ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
int index = -1;
if (direction == FastFindDirection.Forward)
{
index = Text.IndexOf(pattern, startAt, SC);
}
else
{
index = Text.LastIndexOf(pattern, startAt, SC);
}
if (index != -1)
{
SelectionStart = index;
SelectionLength = pattern.Length;
return(index);
}
}
else
{
RegexOptions options = matchCase ? RegexOptions.None : RegexOptions.IgnoreCase;
Match match = Regex.Match(Text, pattern, options);
if (match.Success)
{
SelectionStart = match.Index;
SelectionLength = match.Length;
return(match.Index);
}
}
return(-1);
}
public bool FindNext(string pattern, FastFindMode mode, bool matchCase,
FastFindDirection direction = FastFindDirection.Forward)
{
if (pattern.Length == 0 || HasText == false)
{
return(false);
}
int pos;
if (lastFindPos > -1 && lastFindPattern == pattern)
{
int start = (lastFindPos + 1 > Text.Length) ? 0 : lastFindPos + 1;
pos = Find(pattern, start, mode, matchCase, direction);
}
else
{
pos = Find(pattern, 0, mode, matchCase, direction);
}
lastFindPos = (pos < 0) ? 0 : pos;
lastFindPattern = pattern;
return(pos != -1);
}
