private bool TryHighlightItemUnderMouse()

in src/GoToDef/GoToDefMouseHandler.cs [296:354]
44 lines of code
13 McCabe index (conditional complexity)

        private bool TryHighlightItemUnderMouse(Point position)
        {
            bool updated = false;

            try
            {
                var line = _view.TextViewLines.GetTextViewLineContainingYCoordinate(position.Y);
                if (line == null)
                    return false;

                var bufferPosition = line.GetBufferPositionFromXCoordinate(position.X);

                if (!bufferPosition.HasValue)
                    return false;

                // Quick check - if the mouse is still inside the current underline span, we're already set.
                var currentSpan = CurrentUnderlineSpan;
                if (currentSpan.HasValue && currentSpan.Value.Contains(bufferPosition.Value))
                {
                    updated = true;
                    return true;
                }


                var extent = _navigator.GetExtentOfWord(bufferPosition.Value);
                if (!extent.IsSignificant)
                    return false;

                // For C#, we ignore namespaces after using statements - GoToDef will fail for those.
                if (_view.TextBuffer.ContentType.IsOfType("csharp"))
                {
                    string lineText = bufferPosition.Value.GetContainingLine().GetText().Trim();
                    if (lineText.StartsWith("using", StringComparison.OrdinalIgnoreCase))
                        return false;
                }

                // Now, check for valid classification type.  C# and C++ (at least) classify the things we are interested
                // in as either "identifier" or "user types" (though "identifier" will yield some false positives).  VB, unfortunately,
                // doesn't classify identifiers.
                foreach (var classification in _aggregator.GetClassificationSpans(extent.Span))
                {
                    var name = classification.ClassificationType.Classification.ToLower();
                    if ((name.Contains("identifier") || name.Contains("user types")) &&
                        SetHighlightSpan(classification.Span))
                    {
                        updated = true;
                        return true;
                    }
                }

                // No update occurred, so return false.
                return false;
            }
            finally
            {
                if (!updated)
                    SetHighlightSpan(null);
            }
        }