private IList GetSelectedNodes()

in ArchivedSamples/Source_Code_Control_Provider/C#/SccProvider.cs [830:914]
71 lines of code
10 McCabe index (conditional complexity)

		private IList<VSITEMSELECTION> GetSelectedNodes()
		{
			// Retrieve shell interface in order to get current selection
			IVsMonitorSelection monitorSelection = this.GetService(typeof(IVsMonitorSelection)) as IVsMonitorSelection;
			Debug.Assert(monitorSelection != null, "Could not get the IVsMonitorSelection object from the services exposed by this project");
			if (monitorSelection == null)
			{
				throw new InvalidOperationException();
			}
            
			List<VSITEMSELECTION> selectedNodes = new List<VSITEMSELECTION>();
			IntPtr hierarchyPtr = IntPtr.Zero;
			IntPtr selectionContainer = IntPtr.Zero;
			try
			{
				// Get the current project hierarchy, project item, and selection container for the current selection
				// If the selection spans multiple hierachies, hierarchyPtr is Zero
				uint itemid;
				IVsMultiItemSelect multiItemSelect = null;
				ErrorHandler.ThrowOnFailure(monitorSelection.GetCurrentSelection(out hierarchyPtr, out itemid, out multiItemSelect, out selectionContainer));

                if (itemid != VSConstants.VSITEMID_SELECTION)
                {
				    // We only care if there are nodes selected in the tree
                    if (itemid != VSConstants.VSITEMID_NIL)
                    {
                        if (hierarchyPtr == IntPtr.Zero)
                        {
                            // Solution is selected
                            VSITEMSELECTION vsItemSelection;
                            vsItemSelection.pHier = null;
                            vsItemSelection.itemid = itemid;
                            selectedNodes.Add(vsItemSelection);
                        }
                        else
                        {
                            IVsHierarchy hierarchy = (IVsHierarchy)Marshal.GetObjectForIUnknown(hierarchyPtr);
                            // Single item selection
                            VSITEMSELECTION vsItemSelection;
                            vsItemSelection.pHier = hierarchy;
                            vsItemSelection.itemid = itemid;
                            selectedNodes.Add(vsItemSelection);
                        }
                    }
                }
                else
                {
                    if (multiItemSelect != null)
                    {
                        // This is a multiple item selection.

                        //Get number of items selected and also determine if the items are located in more than one hierarchy
                        uint numberOfSelectedItems;
                        int isSingleHierarchyInt;
                        ErrorHandler.ThrowOnFailure(multiItemSelect.GetSelectionInfo(out numberOfSelectedItems, out isSingleHierarchyInt));
                        bool isSingleHierarchy = (isSingleHierarchyInt != 0);

                        // Now loop all selected items and add them to the list 
                        Debug.Assert(numberOfSelectedItems > 0, "Bad number of selected itemd");
                        if (numberOfSelectedItems > 0)
                        {
                            VSITEMSELECTION[] vsItemSelections = new VSITEMSELECTION[numberOfSelectedItems];
                            ErrorHandler.ThrowOnFailure(multiItemSelect.GetSelectedItems(0, numberOfSelectedItems, vsItemSelections));
                            foreach (VSITEMSELECTION vsItemSelection in vsItemSelections)
                            {
                                selectedNodes.Add(vsItemSelection);
                            }
                        }
                    }
                }
			}
			finally
			{
				if (hierarchyPtr != IntPtr.Zero)
				{
					Marshal.Release(hierarchyPtr);
				}
				if (selectionContainer != IntPtr.Zero)
				{
					Marshal.Release(selectionContainer);
				}
			}

			return selectedNodes;
		}