int LookBackwards(AufzaehlungParser.Token[] tokens, int position, int minPosition, out bool foundSomething)
{
var relativPosition = 0;
foundSomething = false;
for (int i = position - 1; i > Math.Max(position - 1 - MaxSteps, 0); i--, relativPosition++)
{
var symbol = tokens[i].Symbol;
if (relativPosition == 0 && symbol == AufzaehlungParser.Token.KnownSymbols.NonImportant)
continue;
if (symbol == AufzaehlungParser.Token.KnownSymbols.Block)
break;
if (symbol == AufzaehlungParser.Token.KnownSymbols.Substantiv)
foundSomething = true;
if (symbol == AufzaehlungParser.Token.KnownSymbols.Substantiv && i > minPosition)
continue;
return tokens[i + 1].Start;
}
return tokens[position - relativPosition].Start;
}
int FindNextSeperator(AufzaehlungParser.Token[] tokens, int start)
{
for (int i = start; i < tokens.Length; i++)
{
if (tokens[i].Symbol == AufzaehlungParser.Token.KnownSymbols.Seperator)
return i;
}
return -1;
}
Tuple<int, int> FindEnumerationSurround(AufzaehlungParser.Token[] tokens, int position, int minPosition, out int endPosition)
{
// finde das nächste nicht Substantiv vor dem zeichen
// Substantiv = "Wort wo erster Buchstabe gross oder Zahl"
var lookBackwards = false;
var lookForewards = false;
var startPos = LookBackwards(tokens, position, minPosition, out lookBackwards);
var endPos = LookForward(tokens, position, out endPosition, out lookForewards);
if (!lookBackwards || !lookForewards)
return null;
return Tuple.Create(startPos, endPos);
}
int LookForward(AufzaehlungParser.Token[] tokens, int position, out int endPosition, out bool foundSomething)
{
var relativPosition = 0;
foundSomething = false;
for (int i = position + 1; i < Math.Min(position + 1 + MaxSteps, tokens.Count()); i++, relativPosition++)
{
var symbol = tokens[i].Symbol;
if (relativPosition == 0 && symbol == AufzaehlungParser.Token.KnownSymbols.NonImportant)
continue;
if (symbol == AufzaehlungParser.Token.KnownSymbols.Substantiv)
foundSomething = true;
if (symbol == AufzaehlungParser.Token.KnownSymbols.Substantiv && relativPosition <= MaxSteps)
continue;
endPosition = position + relativPosition;
return tokens[endPosition].End;
}
endPosition = position + relativPosition;
return tokens[endPosition].End;
}