PowerArgs.Cli.ValidationEnforcementTokenHighlighter.ShouldBeHighlighted C# (CSharp) Method

        public bool ShouldBeHighlighted(RichCommandLineContext readerContext, HighlighterContext highlighterContext)
        {
            // don't even try mark tokens as invalid unless the cursor is on it
            if (readerContext.BufferPosition >= highlighterContext.CurrentToken.StartIndex && readerContext.BufferPosition < highlighterContext.CurrentToken.EndIndex)
            {
                return false;
            }

            var currentToken = highlighterContext.CurrentToken.Value;
            var previousToken = PowerArgsRichCommandLineReader.FindPreviousNonWhitespaceToken(readerContext, highlighterContext);
            var firstToken = readerContext.Tokens[0].Value;

            CommandLineAction contextualAction = PowerArgsRichCommandLineReader.FindContextualAction(firstToken, definition);
            CommandLineArgument contextualArgument = PowerArgsRichCommandLineReader.FindContextualArgument(previousToken, contextualAction, definition);

            if (contextualArgument != null)
            {
                if(contextualArgument.TestIsValidAndRevivable(currentToken) == false)
                {
                    // the current token either failed validation or could not be revived
                    return true;
                }
            }

            bool expectMatchingArg;
            CommandLineArgument currentTokenArgument = PowerArgsRichCommandLineReader.FindCurrentTokenArgument(contextualAction, currentToken, out expectMatchingArg, definition);

            if(currentTokenArgument == null && expectMatchingArg)
            {
                // The current token starts with a - or /, but does not match a global or action specific argument, so we'll highlight the token red
                return true;
            }

            return false;
        }