//============================================================
private static int SeekWithoutClamping(this StringView str, int start, SeekMode mode, Ward1D ward)
{
if (mode == SeekMode.MoveOneChar)
{
return(start + ward.GetOffset());
}
else if (mode == SeekMode.UntilNewline)
{
if (ward == Ward1D.Backward)
{
return(str.FindLast('\n', start + 1));
}
else if (ward == Ward1D.Forward)
{
return(str.FindFirst('\n', start));
}
}
else
{
Debug.Assert((mode
& (SeekMode.LiterallySpaced | SeekMode.PassingQuotation | SeekMode.BracketBalanced)) != 0);
if (ward == Ward1D.Backward)
{
return(str.SeekToSpaceBalanced(start, mode, -1, -1) - 1);
}
else if (ward == Ward1D.Forward)
{
return(str.SeekToSpaceBalanced(start + 1, mode, 1, 0));
}
}
throw new Exception();
}
//============================================================
public static int GetOffset(this Ward1D ward)
{
return(ward == Ward1D.Forward ? 1 : -1);
}
//============================================================
//------------------------------------------------------------
//private static void TopDownTerms(AirTree<StringView>.Node node, StringView str) {
// foreach ((BalancedTermType termType, StringView termStr) in str.EachTerm()) {
// AirTree<StringView>.Node child = node.AddChild(termStr);
// if (termType == BalancedTermType.Bracketed) {
// TopDownTerms(child, termStr.GetSubView(+1, termStr.Length - 1));
// }
// }
//}
//public static AirTree<StringView> TopDownTerms(this StringView str) {
// var tree = new AirTree<StringView>(str);
// TopDownTerms(tree.root, str);
// return tree;
//}
//public static string TopDownTerms(this string str) {
// return str.GetFullView().TopDownTerms().ToString();
//}
//------------------------------------------------------------
//private static void HeadTail(AirTree<StringView>.Node node, StringView str) {
// int count = 0;
// foreach ((BalancedTermType termType, StringView termStr) in str.EachTerm()) {
// if (count++ == 0) {
// node.Value = termStr;
// } else {
// AirTree<StringView>.Node child = node.AddChild(termStr);
// if (termType == BalancedTermType.Bracketed) {
// HeadTail(child, termStr.GetSubView(+1, termStr.Length - 1));
// }
// }
// }
//}
//public static AirTree<StringView> HeadTail(this StringView str) {
// var tree = new AirTree<StringView>(str);
// HeadTail(tree.root, str);
// return tree;
//}
//public static string HeadTail(this string str) {
// return str.GetFullView().HeadTail().ToString();
//}
//============================================================
public static int Seek(this StringView str, int start, SeekMode mode, Ward1D ward)
{
str.ValidateIndex(start);
return(Mathf.Clamp(str.SeekWithoutClamping(start, mode, ward), 0, str.Length));
}
