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terminal.cpython-38.pyc
U ci�_� � @ s` d Z ddlZddlZddlZddlZddlZG dd� de�ZG dd� de�Z G dd� de�Z dS ) z Terminal / input handling � Nc @ sV e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zddd�Z ddd�Z ddd�Z d S )�Terminalz@ Do minimal terminal mangling to prompt users for input c C s || _ d | _d | _| �� d S �N)�fd� orig_flags� orig_term�save)�selfr � r �&/usr/share/netplan/netplan/terminal.py�__init__" s zTerminal.__init__c C sP t j�� rLt�| j�}|d tjB |d< |d tjB |d< t�| jtj |� d S �N� � �sys�stdin�isatty�termios� tcgetattrr ZICANONZECHO� tcsetattrZTCSANOW�r Zattrsr r r � enable_echo( s zTerminal.enable_echoc C sT t j�� rPt�| j�}|d tj @ |d< |d tj @ |d< t�| jtj |� d S r r r r r r � disable_echo/ s zTerminal.disable_echoc C s, t � | jt j�}t � | jt j|tjB � d S r ��fcntlr �F_GETFL�F_SETFL�os� O_NONBLOCK�r �flagsr r r �enable_nonblocking_io6 s z Terminal.enable_nonblocking_ioc C s. t � | jt j�}t � | jt j|tj @ � d S r r r r r r �disable_nonblocking_io: s z Terminal.disable_nonblocking_io�x Nc C s� t d� t� }| �|� | �� | �� |s0d}t d�|�� |}|dkr�t d�|tt|���dd� t�t j gg g d� z&t j � � }|d kr�| � |� t � �W n tk r� Y nX |d8 }qB| � |� t� �d S ) a� Get a "confirmation" input from the user, for at most (timeout) seconds. Optionally, customize the message to be displayed. timeout -- timeout to wait for input (default 120) message -- optional customized message ("Press ENTER to (message)") raises: InputAccepted -- the user confirmed the changes InputRejected -- the user rejected the changes z%Do you want to keep these settings? z accept the new configurationz&Press ENTER before the timeout to {} r z%Changes will revert in {:>{}} seconds� )�end� � N)�print�dictr r r �format�len�str�selectr r �read�reset� InputAccepted� TypeError� InputRejected)r �timeout�message�settingsZ timeout_now�cr r r �get_confirmation_input> s, z Terminal.get_confirmation_inputc C sT t � | jt j�}d}tj�� r*t�| j�}|dk rD|�||d�� n || _ || _ dS )z� Save the terminal's current attributes and flags Optional argument: - dest: if set, save settings to this dict N)r �term) r r r r r r r r �updater r )r �destr r r r r r p s � z Terminal.savec C sd d}d}|dk r&|� d�}|� d�}n | j}| j}tj�� rNt�| jtj |� t � | jt j |� dS )z� Reset the terminal to its original attributes and flags Optional argument: - orig: if set, reset to settings from this dict Nr7 r ) �getr r r r r r r r Z TCSAFLUSHr r )r �origr r r r r r. � s zTerminal.reset)r" N)N)N) �__name__� __module__� __qualname__�__doc__r r r r r! r6 r r. r r r r r s 2 r c @ s e Zd ZdZdS )r/ z Denotes has accepted inputN�r< r= r> r? r r r r r/ � s r/ c @ s e Zd ZdZdS )r1 z) Denotes that the user has rejected inputNr@ r r r r r1 � s r1 ) r? r r r r, r �objectr � Exceptionr/ r1 r r r r �<module> s y