protected static (int startIndex, int endIndex) GetIndexes(SeparatedSyntaxList <TNode> list, TextSpan span)
{
SeparatedSyntaxList <TNode> .Enumerator en = list.GetEnumerator();
if (en.MoveNext())
{
int i = 0;
while (span.Start >= en.Current.FullSpan.End &&
en.MoveNext())
{
i++;
}
if (span.Start >= en.Current.FullSpan.Start &&
span.Start <= en.Current.Span.Start)
{
int j = i;
while (span.End > GetEndIndex(list, en.Current, j) &&
en.MoveNext())
{
j++;
}
if (span.End >= en.Current.Span.End &&
span.End <= GetEndIndex(list, en.Current, j))
{
return(i, j);
}
}
}
return(-1, -1);
}
public static SelectionResult Create <TNode>(SeparatedSyntaxList <TNode> list, TextSpan span) where TNode : SyntaxNode
{
SeparatedSyntaxList <TNode> .Enumerator en = list.GetEnumerator();
if (en.MoveNext())
{
int i = 0;
while (span.Start >= en.Current.FullSpan.End &&
en.MoveNext())
{
i++;
}
if (span.Start >= en.Current.FullSpan.Start &&
span.Start <= en.Current.SpanStart)
{
int j = i;
while (span.End > GetLastIndex(en.Current, j) &&
en.MoveNext())
{
j++;
}
if (span.End >= en.Current.Span.End &&
span.End <= GetLastIndex(en.Current, j))
{
return(new SelectionResult(i, j));
}
}
}
return(Fail);
int GetLastIndex(TNode node, int i)
{
if (i < list.Count - 1 ||
list.Count == list.SeparatorCount)
{
return(list.GetSeparator(i).FullSpan.End);
}
return(node.FullSpan.End);
}
}