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moved a bunch of garbage (things that have nothing to do in root) to _trash

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mia 2025-06-15 22:42:02 +02:00
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"""Terminal management helpers"""
# Copyright (c) 2020-2024, Emmanuel Blot <emmanuel.blot@free.fr>
# Copyright (c) 2020, Michael Pratt <mpratt51@gmail.com>
# All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
from os import environ, read as os_read
from sys import platform, stderr, stdin, stdout
# pylint: disable=import-error
if platform == 'win32':
import msvcrt
from subprocess import call # ugly workaround for an ugly OS
else:
from termios import (ECHO, ICANON, TCSAFLUSH, TCSANOW, VINTR, VMIN, VSUSP,
VTIME, tcgetattr, tcsetattr)
# pylint workaround (disable=used-before-assignment)
def call():
# pylint: disable=missing-function-docstring
pass
class Terminal:
"""Terminal management function
"""
FNKEYS = {
# Ctrl + Alt + Backspace
14: b'\x1b^H',
# Ctrl + Alt + Enter
28: b'\x1b\r',
# Pause/Break
29: b'\x1c',
# Arrows
72: b'\x1b[A',
80: b'\x1b[B',
77: b'\x1b[C',
75: b'\x1b[D',
# Arrows (Alt)
152: b'\x1b[1;3A',
160: b'\x1b[1;3B',
157: b'\x1b[1;3C',
155: b'\x1b[1;3D',
# Arrows (Ctrl)
141: b'\x1b[1;5A',
145: b'\x1b[1;5B',
116: b'\x1b[1;5C',
115: b'\x1b[1;5D',
# Ctrl + Tab
148: b'\x1b[2J',
# Cursor (Home, Ins, Del...)
71: b'\x1b[1~',
82: b'\x1b[2~',
83: b'\x1b[3~',
79: b'\x1b[4~',
73: b'\x1b[5~',
81: b'\x1b[6~',
# Cursor + Alt
151: b'\x1b[1;3~',
162: b'\x1b[2;3~',
163: b'\x1b[3;3~',
159: b'\x1b[4;3~',
153: b'\x1b[5;3~',
161: b'\x1b[6;3~',
# Cursor + Ctrl (xterm)
119: b'\x1b[1;5H',
146: b'\x1b[2;5~',
147: b'\x1b[3;5~',
117: b'\x1b[1;5F',
114: b'\x1b[5;5~',
118: b'\x1b[6;5~',
# Function Keys (F1 - F12)
59: b'\x1b[11~',
60: b'\x1b[12~',
61: b'\x1b[13~',
62: b'\x1b[14~',
63: b'\x1b[15~',
64: b'\x1b[17~',
65: b'\x1b[18~',
66: b'\x1b[19~',
67: b'\x1b[20~',
68: b'\x1b[21~',
133: b'\x1b[23~',
134: b'\x1b[24~',
# Function Keys + Shift (F11 - F22)
84: b'\x1b[23;2~',
85: b'\x1b[24;2~',
86: b'\x1b[25~',
87: b'\x1b[26~',
88: b'\x1b[28~',
89: b'\x1b[29~',
90: b'\x1b[31~',
91: b'\x1b[32~',
92: b'\x1b[33~',
93: b'\x1b[34~',
135: b'\x1b[20;2~',
136: b'\x1b[21;2~',
# Function Keys + Ctrl (xterm)
94: b'\x1bOP',
95: b'\x1bOQ',
96: b'\x1bOR',
97: b'\x1bOS',
98: b'\x1b[15;2~',
99: b'\x1b[17;2~',
100: b'\x1b[18;2~',
101: b'\x1b[19;2~',
102: b'\x1b[20;3~',
103: b'\x1b[21;3~',
137: b'\x1b[23;3~',
138: b'\x1b[24;3~',
# Function Keys + Alt (xterm)
104: b'\x1b[11;5~',
105: b'\x1b[12;5~',
106: b'\x1b[13;5~',
107: b'\x1b[14;5~',
108: b'\x1b[15;5~',
109: b'\x1b[17;5~',
110: b'\x1b[18;5~',
111: b'\x1b[19;5~',
112: b'\x1b[20;5~',
113: b'\x1b[21;5~',
139: b'\x1b[23;5~',
140: b'\x1b[24;5~',
}
"""
Pause/Break, Ctrl+Alt+Del, Ctrl+Alt+arrows not mapable
key: ordinal of char from msvcrt.getch()
value: bytes string of ANSI escape sequence for linux/xterm
numerical used over linux specifics for Home and End
VT or CSI escape sequences used when linux has no sequence
something unique for keys without an escape function
0x1b == Escape key
"""
IS_MSWIN = platform == 'win32'
"""Whether we run on crap OS."""
def __init__(self):
self._termstates = []
def init(self, fullterm: bool) -> None:
"""Internal terminal initialization function"""
if not self.IS_MSWIN:
self._termstates = [(t.fileno(),
tcgetattr(t.fileno()) if t.isatty() else None)
for t in (stdin, stdout, stderr)]
tfd, istty = self._termstates[0]
if istty:
new = tcgetattr(tfd)
new[3] = new[3] & ~ICANON & ~ECHO
new[6][VMIN] = 1
new[6][VTIME] = 0
if fullterm:
new[6][VINTR] = 0
new[6][VSUSP] = 0
tcsetattr(tfd, TCSANOW, new)
else:
# Windows black magic
# https://stackoverflow.com/questions/12492810
call('', shell=True)
def reset(self) -> None:
"""Reset the terminal to its original state."""
for tfd, att in self._termstates:
# terminal modes have to be restored on exit...
if att is not None:
tcsetattr(tfd, TCSANOW, att)
tcsetattr(tfd, TCSAFLUSH, att)
@staticmethod
def is_term() -> bool:
"""Tells whether the current stdout/stderr stream are connected to a
terminal (vs. a regular file or pipe)"""
return stdout.isatty()
@staticmethod
def is_colorterm() -> bool:
"""Tells whether the current terminal (if any) support colors escape
sequences"""
terms = ['xterm-color', 'ansi']
return stdout.isatty() and environ.get('TERM') in terms
@classmethod
def getkey(cls) -> bytes:
"""Return a key from the current console, in a platform independent
way.
"""
# there's probably a better way to initialize the module without
# relying onto a singleton pattern. To be fixed
if cls.IS_MSWIN:
# w/ py2exe, it seems the importation fails to define the global
# symbol 'msvcrt', to be fixed
while True:
char = msvcrt.getch()
if char == b'\r':
return b'\n'
return char
else:
char = os_read(stdin.fileno(), 1)
return char
@classmethod
def getch_to_escape(cls, char: bytes) -> bytes:
"""Get Windows escape sequence."""
if cls.IS_MSWIN:
return cls.FNKEYS.get(ord(char), char)
return char