private int Open()

in Nodejs/Product/Nodejs/SharedProject/FileDocumentManager.cs [167:270]
84 lines of code
19 McCabe index (conditional complexity)

        private int Open(bool newFile, bool openWith, uint editorFlags, ref Guid editorType, string physicalView, ref Guid logicalView, IntPtr docDataExisting, out IVsWindowFrame windowFrame, WindowFrameShowAction windowFrameAction, bool reopen = false)
        {
            windowFrame = null;
            Debug.Assert(this.Node != null, "No node has been initialized for the document manager");
            Debug.Assert(this.Node.ProjectMgr != null, "No project manager has been initialized for the document manager");
            Debug.Assert(this.Node is FileNode, "Node is not FileNode object");

            if (this.Node == null || this.Node.ProjectMgr == null || this.Node.ProjectMgr.IsClosed)
            {
                return VSConstants.E_FAIL;
            }

            var returnValue = VSConstants.S_OK;
            var caption = this.GetOwnerCaption();
            var fullPath = this.GetFullPathForDocument();

            var uiShellOpenDocument = this.Node.ProjectMgr.Site.GetService(typeof(SVsUIShellOpenDocument)) as IVsUIShellOpenDocument;
            var serviceProvider = this.Node.ProjectMgr.Site.GetService(typeof(IOleServiceProvider)) as IOleServiceProvider;

            var openState = uiShellOpenDocument as IVsUIShellOpenDocument3;
            var showDialog = !reopen && (openState == null || !((__VSNEWDOCUMENTSTATE)openState.NewDocumentState).HasFlag(__VSNEWDOCUMENTSTATE.NDS_Provisional));

            // Make sure that the file is on disk before we open the editor and display message if not found
            if (!((FileNode)this.Node).IsFileOnDisk(showDialog))
            {
                // Bail since we are not able to open the item
                // Do not return an error code otherwise an internal error message is shown. The scenario for this operation
                // normally is already a reaction to a dialog box telling that the item has been removed.
                return VSConstants.S_FALSE;
            }

            try
            {
                this.Node.ProjectMgr.OnOpenItem(fullPath);
                var result = VSConstants.E_FAIL;

                if (openWith)
                {
                    result = uiShellOpenDocument.OpenStandardEditor((uint)__VSOSEFLAGS.OSE_UseOpenWithDialog, fullPath, ref logicalView, caption, this.Node.ProjectMgr, this.Node.ID, docDataExisting, serviceProvider, out windowFrame);
                }
                else
                {
                    __VSOSEFLAGS openFlags = 0;
                    if (newFile)
                    {
                        openFlags |= __VSOSEFLAGS.OSE_OpenAsNewFile;
                    }

                    //NOTE: we MUST pass the IVsProject in pVsUIHierarchy and the itemid
                    // of the node being opened, otherwise the debugger doesn't work.
                    if (editorType != Guid.Empty)
                    {
                        result = uiShellOpenDocument.OpenSpecificEditor(editorFlags, fullPath, ref editorType, physicalView, ref logicalView, caption, this.Node.ProjectMgr.GetOuterInterface<IVsUIHierarchy>(), this.Node.ID, docDataExisting, serviceProvider, out windowFrame);
                    }
                    else
                    {
                        openFlags |= __VSOSEFLAGS.OSE_ChooseBestStdEditor;
                        result = uiShellOpenDocument.OpenStandardEditor((uint)openFlags, fullPath, ref logicalView, caption, this.Node.ProjectMgr, this.Node.ID, docDataExisting, serviceProvider, out windowFrame);
                    }
                }

                if (result != VSConstants.S_OK && result != VSConstants.S_FALSE && result != VSConstants.OLE_E_PROMPTSAVECANCELLED)
                {
                    return result;
                }

                if (windowFrame != null)
                {
                    object var;

                    if (newFile)
                    {
                        ErrorHandler.ThrowOnFailure(windowFrame.GetProperty((int)__VSFPROPID.VSFPROPID_DocData, out var));
                        var persistDocData = (IVsPersistDocData)var;
                        ErrorHandler.ThrowOnFailure(persistDocData.SetUntitledDocPath(fullPath));
                    }

                    var = null;
                    ErrorHandler.ThrowOnFailure(windowFrame.GetProperty((int)__VSFPROPID.VSFPROPID_DocCookie, out var));
                    this.Node.DocCookie = (uint)(int)var;

                    if (windowFrameAction == WindowFrameShowAction.Show)
                    {
                        ErrorHandler.ThrowOnFailure(windowFrame.Show());
                    }
                    else if (windowFrameAction == WindowFrameShowAction.ShowNoActivate)
                    {
                        ErrorHandler.ThrowOnFailure(windowFrame.ShowNoActivate());
                    }
                    else if (windowFrameAction == WindowFrameShowAction.Hide)
                    {
                        ErrorHandler.ThrowOnFailure(windowFrame.Hide());
                    }
                }
            }
            catch (COMException e)
            {
                Trace.WriteLine("Exception e:" + e.Message);
                returnValue = e.ErrorCode;
                CloseWindowFrame(ref windowFrame);
            }

            return returnValue;
        }