public IList GetClassificationSpans()

in Diff_Classifier/C#/DiffClassifier.cs [41:93]
44 lines of code
16 McCabe index (conditional complexity)

        public IList<ClassificationSpan> GetClassificationSpans(SnapshotSpan span)
        {
            ITextSnapshot snapshot = span.Snapshot;

            List<ClassificationSpan> spans = new List<ClassificationSpan>();

            if(snapshot.Length == 0)
                return spans;

            int startno = span.Start.GetContainingLine().LineNumber;
            int endno = (span.End - 1).GetContainingLine().LineNumber;

            for (int i = startno; i <= endno; i++)
            {
                ITextSnapshotLine line = snapshot.GetLineFromLineNumber(i);

                IClassificationType type = null;
                string text = line.Snapshot.GetText(
                        new SnapshotSpan(line.Start, Math.Min(4, line.Length))); // We only need the first 4 

                if (text.StartsWith("!", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.changed");
                else if (text.StartsWith("---", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.header");
                else if (text.StartsWith("-", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.removed");
                else if (text.StartsWith("<", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.removed");
                else if (text.StartsWith("@@", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.patchline");
                else if (text.StartsWith("+++", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.header");
                else if (text.StartsWith("+", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.added");
                else if (text.StartsWith(">", StringComparison.Ordinal))
                    type = _classificationTypeRegistry.GetClassificationType("diff.added");

                else if (text.StartsWith("***", StringComparison.Ordinal))
                {
                    if (i < 2)
                        type = _classificationTypeRegistry.GetClassificationType("diff.header");
                    else
                        type = _classificationTypeRegistry.GetClassificationType("diff.infoline");
                }
                else if (text.Length > 0 && !char.IsWhiteSpace(text[0]))
                    type = _classificationTypeRegistry.GetClassificationType("diff.infoline");

                if (type != null)
                    spans.Add(new ClassificationSpan(line.Extent, type));
            }

            return spans;
        }