ACAT.Extensions.Default.WordPredictors.PresageWCF.PresageWordPredictor.matchPrefix C# (CSharp) Method

        private bool matchPrefix(String prefix, String word)
        {
            if (!Common.AppPreferences.WordPredictionFilterMatchPrefix)
            {
                return true;
            }

            prefix = prefix.Trim();
            if (String.IsNullOrEmpty(prefix))
            {
                return true;
            }

            int numCharsToMatch = prefix.Length - Common.AppPreferences.WordPredictionFilterMatchPrefixLengthAdjust;
            if (numCharsToMatch <= 0)
                numCharsToMatch = prefix.Length;

            if (numCharsToMatch > 0)
            {
                if (word.Length > numCharsToMatch)
                    word = word.Substring(0, numCharsToMatch);
                if (prefix.Length > numCharsToMatch)
                    prefix = prefix.Substring(0, numCharsToMatch);
            }

            return (word.Length > prefix.Length) ?
                word.StartsWith(prefix, StringComparison.InvariantCultureIgnoreCase) :
                prefix.StartsWith(word, StringComparison.InvariantCultureIgnoreCase);
        }