Method undo

src/commands/command_history.py:104–145

Undo the last command. Returns: Description of undone command if successful, None otherwise

(self)

            return False
    
    def undo(self) -> Optional[str]:
        """
        Undo the last command.

        Returns:
            Description of undone command if successful, None otherwise
        """
        print(f"\n=== COMMAND HISTORY UNDO START ===")
        print(f"DEBUG: Attempting to undo command")
        print(f"DEBUG: Current index: {self.current_index}")
        print(f"DEBUG: History size: {len(self.commands)}")
        print(f"DEBUG: Can undo: {self.can_undo()}")
        
        if not self.can_undo():
            print(f"DEBUG: Cannot undo - no commands available")
            return None

        command = self.commands[self.current_index]
        print(f"DEBUG: Undoing command: {command.get_description()}")
        print(f"DEBUG: Command type: {type(command).__name__}")
        
        try:
            print(f"DEBUG: Calling command.undo()...")
            result = command.undo()
            print(f"DEBUG: Command.undo() returned: {result}")
            
            if result:
                command._mark_undone()
                self.current_index -= 1
                print(f"DEBUG: Command undone successfully, index now: {self.current_index}")
                print(f"=== COMMAND HISTORY UNDO END ===\n")
                return command.get_description()
            else:
                print(f"DEBUG: Command undo failed")
                
        except Exception as e:
            print(f"DEBUG: ERROR - Undo failed for '{command.get_description()}': {e}")
            import traceback
            traceback.print_exc()
        
        print(f"=== COMMAND HISTORY UNDO END (FAILED) ===\n")
        return None
    
    def redo(self) -> Optional[str]:
        """