public int IndexOf(string text, int startIndex, int length)
{
Place place = PlaceOf(startIndex);
int linesCount = LinesCount;
if (text.IndexOf('\n') == -1 && text.IndexOf('\r') == -1)
{
return(SingleLineIndexOf(text, startIndex, length, place));
}
LineSubdivider subdivider = new LineSubdivider(text, true);
if (subdivider.GetLinesCount() == 1)
{
return(SingleLineIndexOf(text, startIndex, length, place));
}
string[] texts = subdivider.GetLines();
string text0 = texts[0];
LineIterator iteratorI = GetLineRange(place.iLine, linesCount - place.iLine);
iteratorI.MoveNext();
if (place.iChar > iteratorI.current.charsCount - text0.Length)
{
iteratorI.MoveNext();
}
while (true)
{
Line line = iteratorI.current;
if (line.Text.EndsWith(text0))
{
int i = iteratorI.Index;
bool correct = i + texts.Length <= linesCount;
if (correct)
{
LineIterator iteratorJ = iteratorI.GetNextRange(texts.Length - 1);
for (int j = 1; j < texts.Length - 1 && correct; j++)
{
iteratorJ.MoveNext();
if (texts[j] != iteratorJ.current.Text)
{
correct = false;
}
}
iteratorJ.MoveNext();
if (correct && iteratorJ.current.Text.StartsWith(texts[texts.Length - 1]))
{
return(IndexOf(new Place(line.Text.Length - text0.Length, i)));
}
}
}
if (!iteratorI.MoveNext())
{
break;
}
}
return(-1);
}
