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# Copyright 2000-2004 Michael Hudson-Doyle <micahel@gmail.com> # # All Rights Reserved # # # Permission to use, copy, modify, and distribute this software and # its documentation for any purpose is hereby granted without fee, # provided that the above copyright notice appear in all copies and # that both that copyright notice and this permission notice appear in # supporting documentation. # # THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO # THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY # AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, # INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER # RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF # CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. import termios TYPE_CHECKING = False if TYPE_CHECKING: from typing import cast else: cast = lambda typ, val: val class TermState: def __init__(self, attrs: list[int \| list[bytes]]) -> None: self.iflag = cast(int, attrs[0]) self.oflag = cast(int, attrs[1]) self.cflag = cast(int, attrs[2]) self.lflag = cast(int, attrs[3]) self.ispeed = cast(int, attrs[4]) self.ospeed = cast(int, attrs[5]) self.cc = cast(list[bytes], attrs[6]) def as_list(self) -> list[int \| list[bytes]]: return [ self.iflag, self.oflag, self.cflag, self.lflag, self.ispeed, self.ospeed, # Always return a copy of the control characters list to ensure # there are not any additional references to self.cc self.cc[:], ] def copy(self) -> "TermState": return self.__class__(self.as_list()) def tcgetattr(fd: int) -> TermState: return TermState(termios.tcgetattr(fd)) def tcsetattr(fd: int, when: int, attrs: TermState) -> None: termios.tcsetattr(fd, when, attrs.as_list()) class Term(TermState): TS__init__ = TermState.__init__ def __init__(self, fd: int = 0) -> None: self.TS__init__(termios.tcgetattr(fd)) self.fd = fd self.stack: list[list[int \| list[bytes]]] = [] def save(self) -> None: self.stack.append(self.as_list()) def set(self, when: int = termios.TCSANOW) -> None: termios.tcsetattr(self.fd, when, self.as_list()) def restore(self) -> None: self.TS__init__(self.stack.pop()) self.set()