Microsoft.R.Editor.Document.REditorDocument.FindRBuffer C# (CSharp) Method

        public static ITextBuffer FindRBuffer(ITextBuffer viewBuffer) {
            if (viewBuffer.ContentType.IsOfType(RContentTypeDefinition.ContentType)) {
                return viewBuffer;
            }

            // Try locating R buffer
            ITextBuffer rBuffer = null;
            IProjectionBuffer pb = viewBuffer as IProjectionBuffer;
            if (pb != null) {
                rBuffer = pb.SourceBuffers.FirstOrDefault((ITextBuffer tb) => {
                    return tb.ContentType.IsOfType(RContentTypeDefinition.ContentType);
                });
            }

            return rBuffer;
        }

        /// <summary>
        /// Maps given point from view buffer to R editor buffer
        /// </summary>
        public static SnapshotPoint?MapPointFromView(ITextView textView, SnapshotPoint point)
        {
            ITextBuffer   rBuffer;
            SnapshotPoint?documentPoint = null;

            IREditorDocument document = REditorDocument.FindInProjectedBuffers(textView.TextBuffer);

            if (document != null)
            {
                rBuffer = document.TextBuffer;
            }
            else
            {
                // Last resort, typically in unit tests when document is not available
                rBuffer = REditorDocument.FindRBuffer(textView.TextBuffer);
            }

            if (rBuffer != null)
            {
                if (textView.BufferGraph != null)
                {
                    documentPoint = textView.MapDownToBuffer(point, rBuffer);
                }
                else
                {
                    documentPoint = point;
                }
            }

            return(documentPoint);
        }