VsTeXProject.VisualStudio.Project.ProjectNode.PackageSelectionDataObject C# (CSharp) Method

        internal virtual DataObject PackageSelectionDataObject(bool cutHighlightItems)
        {
            CleanupSelectionDataObject(false, false, false);
            var sb = new StringBuilder();

            DataObject dataObject = null;

            try
            {
                var selectedNodes = GetSelectedNodes();
                if (selectedNodes != null)
                {
                    InstantiateItemsDraggedOrCutOrCopiedList();

                    StringBuilder selectionContent = null;

                    // If there is a selection package the data
                    if (selectedNodes.Count > 1)
                    {
                        foreach (var node in selectedNodes)
                        {
                            selectionContent = node.PrepareSelectedNodesForClipBoard();
                            if (selectionContent != null)
                            {
                                sb.Append(selectionContent);
                            }
                        }
                    }
                    else if (selectedNodes.Count == 1)
                    {
                        var selectedNode = selectedNodes[0];
                        selectionContent = selectedNode.PrepareSelectedNodesForClipBoard();
                        if (selectionContent != null)
                        {
                            sb.Append(selectionContent);
                        }
                    }
                }

                // Add the project items first.
                var ptrToItems = PackageSelectionData(sb, false);
                if (ptrToItems == IntPtr.Zero)
                {
                    return null;
                }

                var fmt = DragDropHelper.CreateFormatEtc(DragDropHelper.CF_VSSTGPROJECTITEMS);
                dataObject = new DataObject();
                dataObject.SetData(fmt, ptrToItems);

                // Now add the project path that sourced data. We just write the project file path.
                var ptrToProjectPath = PackageSelectionData(new StringBuilder(GetMkDocument()), true);

                if (ptrToProjectPath != IntPtr.Zero)
                {
                    dataObject.SetData(DragDropHelper.CreateFormatEtc(DragDropHelper.CF_VSPROJECTCLIPDESCRIPTOR),
                        ptrToProjectPath);
                }

                if (cutHighlightItems)
                {
                    var first = true;
                    var w = UIHierarchyUtilities.GetUIHierarchyWindow(site, SolutionExplorer);

                    // This happens in the context of cutting multiple items from the project.
                    // Since we are already in solution explorer, it is extremely unlikely that we get a null return.
                    // If we do, the icons for the cut items will not fade.  The cut operation will still succeed.
                    if (w != null)
                    {
                        foreach (var node in ItemsDraggedOrCutOrCopied)
                        {
                            ErrorHandler.ThrowOnFailure(w.ExpandItem(InteropSafeIVsUIHierarchy, node.ID,
                                first ? EXPANDFLAGS.EXPF_CutHighlightItem : EXPANDFLAGS.EXPF_AddCutHighlightItem));
                            first = false;
                        }
                    }
                }
            }
            catch (COMException e)
            {
                Trace.WriteLine("Exception : " + e.Message);

                dataObject = null;
            }

            return dataObject;
        }