PSAttack.PSAttackProcessing.AttackState.relativeCmdCursorPos C# (CSharp) Method

        public int relativeCmdCursorPos()
        {
            List<int> cursorXY = this.getCursorXY();
            return this.cursorPos - this.promptLength;
        }

        // This is called everytime a key is pressed.
        public static AttackState CommandProcessor(AttackState attackState)
        {
            attackState.output = null;
            int relativePos = attackState.relativeCursorPos();
            int cmdLength   = attackState.displayCmd.Length;

            /////////////////////////
            // BACKSPACE OR DELETE //
            /////////////////////////
            if (attackState.keyInfo.Key == ConsoleKey.Backspace || attackState.keyInfo.Key == ConsoleKey.Delete)
            {
                attackState.ClearLoop();
                if (attackState.displayCmd != "" && attackState.relativeCursorPos() > 0)
                {
                    if (attackState.keyInfo.Key == ConsoleKey.Backspace)
                    {
                        attackState.cursorPos -= 1;
                    }
                    List <char> displayCmd        = attackState.displayCmd.ToList();
                    int         relativeCursorPos = attackState.relativeCmdCursorPos();
                    displayCmd.RemoveAt(relativeCursorPos);
                    attackState.displayCmd = new string(displayCmd.ToArray());
                }
            }
            /////////////////////////
            // BACKSPACE OR DELETE //
            /////////////////////////
            else if (attackState.keyInfo.Key == ConsoleKey.Home || attackState.keyInfo.Key == ConsoleKey.End)
            {
                if (attackState.keyInfo.Key == ConsoleKey.Home)
                {
                    attackState.cursorPos = attackState.promptLength;
                }
                else
                {
                    attackState.cursorPos = attackState.promptLength + attackState.displayCmd.Length;
                }
            }
            ////////////////
            // UP OR DOWN //
            ////////////////
            else if (attackState.keyInfo.Key == ConsoleKey.UpArrow || attackState.keyInfo.Key == ConsoleKey.DownArrow)
            {
                return(history(attackState));
            }
            ///////////////////
            // LEFT OR RIGHT //
            ///////////////////

            // TODO: Fix arrows navigating between wrapped command lines
            else if (attackState.keyInfo.Key == ConsoleKey.LeftArrow)
            {
                if (attackState.relativeCmdCursorPos() > 0)
                {
                    attackState.ClearLoop();
                    attackState.cursorPos -= 1;
                }
                return(attackState);
            }
            else if (attackState.keyInfo.Key == ConsoleKey.RightArrow)
            {
                if (attackState.relativeCmdCursorPos() < attackState.displayCmd.Length)
                {
                    attackState.ClearLoop();
                    attackState.cursorPos += 1;
                }
                return(attackState);
            }
            ///////////
            // ENTER //
            ///////////
            else if (attackState.keyInfo.Key == ConsoleKey.Enter)
            {
                Console.WriteLine();
                attackState.ClearLoop();
                attackState.cmd = attackState.displayCmd;
                // don't add blank lines to history
                if (attackState.cmd != "")
                {
                    attackState.history.Add(attackState.cmd);
                }
                if (attackState.cmd == "exit")
                {
                    System.Environment.Exit(0);
                }
                else if (attackState.cmd == "clear")
                {
                    Console.Clear();
                    attackState.displayCmd = "";
                    Display.printPrompt(attackState);
                }
                // TODO: Make this better.
                //else if (attackState.cmd.Contains(".exe"))
                //{
                //    attackState.cmd = "Start-Process -NoNewWindow -Wait " + attackState.cmd;
                //    attackState = Processing.PSExec(attackState);
                //    Display.Output(attackState);
                //}
                // assume that we just want to execute whatever makes it here.
                else
                {
                    attackState            = Processing.PSExec(attackState);
                    attackState.displayCmd = "";
                    Display.Output(attackState);
                }
                // clear out cmd related stuff from state
                attackState.ClearIO(display: true);
            }
            /////////
            // TAB //
            /////////
            else if (attackState.keyInfo.Key == ConsoleKey.Tab)
            {
                return(TabExpansion.Process(attackState));
            }
            //////////
            // if nothing matched, lets assume its a character and add it to displayCmd
            //////////
            else
            {
                attackState.ClearLoop();
                // figure out where to insert the typed character
                List <char> displayCmd           = attackState.displayCmd.ToList();
                int         relativeCmdCursorPos = attackState.relativeCmdCursorPos();
                int         cmdInsertPos         = attackState.cursorPos - attackState.promptLength;
                displayCmd.Insert(attackState.cursorPos - attackState.promptLength, attackState.keyInfo.KeyChar);
                attackState.displayCmd = new string(displayCmd.ToArray());
                attackState.cursorPos += 1;
            }
            return(attackState);
        }