Source code for TermTk.TTkCore.drivers.term_unix

# MIT License
#
# Copyright (c) 2022 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

__all__ = ['TTkTerm']

import sys, os, signal
from threading import Thread, Lock

try: import termios
except Exception as e:
    print(f'ERROR: {e}')
    exit(1)

from ..TTkTerm.term_base import TTkTermBase
from TermTk.TTkCore.log import TTkLog

[docs] class TTkTerm(TTkTermBase): _sigWinChCb = None # Save treminal attributes during the initialization in order to # restore later the original states _termAttr = termios.tcgetattr(sys.stdin) _termAttrBk = []
[docs] @staticmethod def saveTermAttr(): TTkTerm._termAttrBk.append(termios.tcgetattr(sys.stdin))
[docs] @staticmethod def restoreTermAttr(): if TTkTerm._termAttrBk: termios.tcsetattr(sys.stdin, termios.TCSADRAIN, TTkTerm._termAttrBk.pop()) else: termios.tcsetattr(sys.stdin, termios.TCSADRAIN, TTkTerm._termAttr)
@staticmethod def _setSigmask(mask, value=True): attr = termios.tcgetattr(sys.stdin) if mask & TTkTerm.Sigmask.CTRL_C: attr[6][termios.VINTR]= b'\x03' if value else 0 if mask & TTkTerm.Sigmask.CTRL_S: attr[6][termios.VSTOP]= b'\x13' if value else 0 if mask & TTkTerm.Sigmask.CTRL_Z: attr[6][termios.VSUSP]= b'\x1a' if value else 0 if mask & TTkTerm.Sigmask.CTRL_Q: attr[6][termios.VSTART]= b'\x11' if value else 0 termios.tcsetattr(sys.stdin, termios.TCSADRAIN, attr) TTkTermBase.setSigmask = _setSigmask
[docs] @staticmethod def getSigmask(): mask = 0x00 attr = termios.tcgetattr(sys.stdin) mask |= TTkTerm.Sigmask.CTRL_C if attr[6][termios.VINTR] else 0 mask |= TTkTerm.Sigmask.CTRL_S if attr[6][termios.VSTOP] else 0 mask |= TTkTerm.Sigmask.CTRL_Z if attr[6][termios.VSUSP] else 0 mask |= TTkTerm.Sigmask.CTRL_Q if attr[6][termios.VSTART] else 0 return mask
[docs] @staticmethod def exit(): TTkTermBase.exit() termios.tcsetattr(sys.stdin, termios.TCSADRAIN, TTkTerm._termAttr)
@staticmethod def _push(*args): try: sys.stdout.write(str(*args)) sys.stdout.flush() except BlockingIOError as e: TTkLog.fatal(f"{e=} {e.characters_written=}") except Exception as e: TTkLog.fatal(e) TTkTermBase.push = _push @staticmethod def _flush(): sys.stdout.flush() TTkTermBase.flush = _flush @staticmethod def _setEcho(val: bool): # Set/Unset Terminal Input Echo (i,o,c,l,isp,osp,cc) = termios.tcgetattr(sys.stdin.fileno()) if val: l |= termios.ECHO else: l &= ~termios.ECHO termios.tcsetattr(sys.stdin.fileno(), termios.TCSANOW, [i,o,c,l,isp,osp,cc]) TTkTermBase.setEcho = _setEcho @staticmethod def _CRNL(val: bool): #Translate carriage return to newline on input (unless IGNCR is set). # '\n' CTRL-J # '\r' CTRL-M (Enter) (i,o,c,l,isp,osp,cc) = termios.tcgetattr(sys.stdin.fileno()) if val: i |= termios.ICRNL else: i &= ~termios.ICRNL termios.tcsetattr(sys.stdin.fileno(), termios.TCSANOW, [i,o,c,l,isp,osp,cc]) TTkTermBase.CRNL = _CRNL @staticmethod def _getTerminalSize(): try: return os.get_terminal_size() except OSError as e: print(f'ERROR: {e}') TTkTermBase.getTerminalSize = _getTerminalSize _sigWinChMutex = Lock() @staticmethod def _sigWinChThreaded(): if not TTkTerm._sigWinChMutex.acquire(blocking=False): return while (TTkTerm.width, TTkTerm.height) != (wh:=TTkTerm.getTerminalSize()): TTkTerm.width, TTkTerm.height = wh if TTkTerm._sigWinChCb is not None: TTkTerm._sigWinChCb(TTkTerm.width, TTkTerm.height) TTkTerm._sigWinChMutex.release() @staticmethod def _sigWinCh(signum, frame): Thread(target=TTkTerm._sigWinChThreaded).start() @staticmethod def _registerResizeCb(callback): TTkTerm._sigWinChCb = callback # Dummy call to retrieve the terminal size TTkTerm._sigWinCh(signal.SIGWINCH, None) signal.signal(signal.SIGWINCH, TTkTerm._sigWinCh) TTkTermBase.registerResizeCb = _registerResizeCb