public override string GetText(Span span)
{
if (span.End > this.Length)
{
throw new ArgumentOutOfRangeException("span");
}
if (span.End <= _left.Length)
{
return(_left.GetText(span));
}
else if (span.Start >= _left.Length)
{
return(_right.GetText(new Span(span.Start - _left.Length, span.Length)));
}
else
{
char[] result = new char[span.Length];
int leftLength = _left.Length - span.Start;
_left.CopyTo(span.Start, result, 0, leftLength);
_right.CopyTo(0, result, leftLength, span.Length - leftLength);
return(new string(result));
}
}
internal static ChangeString CreateChangeString(StringRebuilder content)
{
if (content.Length == 0)
{
return(ChangeString.EmptyChangeString);
}
else if (content.Length <= ChangeString.LiteralStringThreshold)
{
return(new LiteralChangeString(content.GetText(new Span(0, content.Length))));
}
else
{
return(new ReferenceChangeString(content));
}
}
public string GetOldText(Span span)
{
return(_oldText.GetText(span));
}