def _patch_iflag(cls, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
python类ICRNL的实例源码
def _patch_iflag(cls, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
def prepare(self):
# per-readline preparations:
self.__svtermstate = tcgetattr(self.input_fd)
raw = self.__svtermstate.copy()
raw.iflag |= termios.ICRNL
raw.iflag &= ~(termios.BRKINT | termios.INPCK |
termios.ISTRIP | termios.IXON)
raw.oflag &= ~termios.OPOST
raw.cflag &= ~(termios.CSIZE | termios.PARENB)
raw.cflag |= (termios.CS8)
raw.lflag &= ~(termios.ICANON | termios.ECHO |
termios.IEXTEN | (termios.ISIG * 1))
raw.cc[termios.VMIN] = 1
raw.cc[termios.VTIME] = 0
tcsetattr(self.input_fd, termios.TCSADRAIN, raw)
self.screen = []
self.height, self.width = self.getheightwidth()
self.__buffer = []
self.__posxy = 0, 0
self.__gone_tall = 0
self.__move = self.__move_short
self.__offset = 0
self.__maybe_write_code(self._smkx)
try:
self.old_sigwinch = signal.signal(
signal.SIGWINCH, self.__sigwinch)
except ValueError:
pass
def _patch_iflag(cls, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
def _patch_iflag(cls, attrs):
# Turn the ICRNL flag back on. (Without this, calling `input()` in
# run_in_terminal doesn't work and displays ^M instead. Ptpython
# evaluates commands using `run_in_terminal`, so it's important that
# they translate ^M back into ^J.)
return attrs | termios.ICRNL
def _patch_iflag(cls, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
def _patch_iflag(cls, attrs):
# Turn the ICRNL flag back on. (Without this, calling `input()` in
# run_in_terminal doesn't work and displays ^M instead. Ptpython
# evaluates commands using `run_in_terminal`, so it's important that
# they translate ^M back into ^J.)
return attrs | termios.ICRNL
def _patch_iflag(cls, attrs):
# Turn the ICRNL flag back on. (Without this, calling `input()` in
# run_in_terminal doesn't work and displays ^M instead. Ptpython
# evaluates commands using `run_in_terminal`, so it's important that
# they translate ^M back into ^J.)
return attrs | termios.ICRNL
def prepare_tty():
"set the terminal in char mode (return each keyboard press at once) and"\
" switch off echoing of this input; return the original settings"
stdin_fd = sys.stdin.fileno() # will most likely be 0 ;->
old_stdin_config = termios.tcgetattr(stdin_fd)
[ iflag, oflag, cflag, lflag, ispeed, ospeed, cc ] = \
termios.tcgetattr(stdin_fd)
cc[termios.VTIME] = 1
cc[termios.VMIN] = 1
iflag = iflag & ~(termios.IGNBRK |
termios.BRKINT |
termios.PARMRK |
termios.ISTRIP |
termios.INLCR |
termios.IGNCR |
#termios.ICRNL |
termios.IXON)
# oflag = oflag & ~termios.OPOST
cflag = cflag | termios.CS8
lflag = lflag & ~(termios.ECHO |
termios.ECHONL |
termios.ICANON |
# termios.ISIG |
termios.IEXTEN)
termios.tcsetattr(stdin_fd, termios.TCSANOW,
[ iflag, oflag, cflag, lflag, ispeed, ospeed, cc ])
return (stdin_fd, old_stdin_config)
def _fix_tty(self):
"""Set suitable tty options
"""
assert self.tcattr is not None
iflag, oflag, cflag, lflag, ispeed, ospeed, chars = self.tcattr # pylint:disable=unpacking-non-sequence
# equivalent to cfmakeraw
iflag &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR |
termios.IGNCR | termios.ICRNL | termios.IXON)
oflag &= ~termios.OPOST
lflag &= ~(termios.ECHO | termios.ECHONL | termios.ICANON | termios.ISIG | termios.IEXTEN)
cflag &= ~(termios.CSIZE | termios.PARENB)
cflag |= termios.CS8
termios.tcsetattr(STDIN, termios.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, chars])
def _patch_iflag(cls, attrs):
# Turn the ICRNL flag back on. (Without this, calling `input()` in
# run_in_terminal doesn't work and displays ^M instead. Ptpython
# evaluates commands using `run_in_terminal`, so it's important that
# they translate ^M back into ^J.)
return attrs | termios.ICRNL
def _patch_iflag(self, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
def _patch_iflag(cls, attrs):
return attrs & ~(
# Disable XON/XOFF flow control on output and input.
# (Don't capture Ctrl-S and Ctrl-Q.)
# Like executing: "stty -ixon."
termios.IXON | termios.IXOFF |
# Don't translate carriage return into newline on input.
termios.ICRNL | termios.INLCR | termios.IGNCR
)
def _patch_iflag(cls, attrs):
# Turn the ICRNL flag back on. (Without this, calling `input()` in
# run_in_terminal doesn't work and displays ^M instead. Ptpython
# evaluates commands using `run_in_terminal`, so it's important that
# they translate ^M back into ^J.)
return attrs | termios.ICRNL
def read_single_keypress(msg):
"""Waits for a single keypress on stdin.
This is a silly function to call if you need to do it a lot because it has
to store stdin's current setup, setup stdin for reading single keystrokes
then read the single keystroke then revert stdin back after reading the
keystroke.
Returns the character of the key that was pressed (zero on
KeyboardInterrupt which can happen when a signal gets handled)
"""
import termios, fcntl, sys, os
fd = sys.stdin.fileno()
# save old state
flags_save = fcntl.fcntl(fd, fcntl.F_GETFL)
attrs_save = termios.tcgetattr(fd)
# make raw - the way to do this comes from the termios(3) man page.
attrs = list(attrs_save) # copy the stored version to update
# iflag
attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK
| termios.ISTRIP | termios.INLCR | termios. IGNCR
| termios.ICRNL | termios.IXON )
# oflag
attrs[1] &= ~termios.OPOST
# cflag
attrs[2] &= ~(termios.CSIZE | termios. PARENB)
attrs[2] |= termios.CS8
# lflag
attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON
| termios.ISIG | termios.IEXTEN)
termios.tcsetattr(fd, termios.TCSANOW, attrs)
# turn off non-blocking
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK)
sys.stdout.write(msg)
sys.stdout.flush()
# read a single keystroke
try:
ret = sys.stdin.read(1) # returns a single character
except KeyboardInterrupt:
ret = 0
finally:
# restore old state
termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save)
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save)
return ret
def get_instruction_key(self):
"""Waits for a single keypress on stdin.
This is a silly function to call if you need to do it a lot because it has
to store stdin's current setup, setup stdin for reading single keystrokes
then read the single keystroke then revert stdin back after reading the
keystroke.
Returns the character of the key that was pressed (zero on
KeyboardInterrupt which can happen when a signal gets handled)
This method is licensed under cc by-sa 3.0
Thanks to mheyman http://stackoverflow.com/questions/983354/how-do-i-make-python-to-wait-for-a-pressed-key\
"""
import termios, fcntl, sys, os
fd = sys.stdin.fileno()
# save old state
flags_save = fcntl.fcntl(fd, fcntl.F_GETFL)
attrs_save = termios.tcgetattr(fd)
# make raw - the way to do this comes from the termios(3) man page.
attrs = list(attrs_save) # copy the stored version to update
# iflag
attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK
| termios.ISTRIP | termios.INLCR | termios. IGNCR
| termios.ICRNL | termios.IXON )
# oflag
attrs[1] &= ~termios.OPOST
# cflag
attrs[2] &= ~(termios.CSIZE | termios. PARENB)
attrs[2] |= termios.CS8
# lflag
attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON
| termios.ISIG | termios.IEXTEN)
termios.tcsetattr(fd, termios.TCSANOW, attrs)
# turn off non-blocking
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK)
# read a single keystroke
try:
ret = sys.stdin.read(1) # returns a single character
except KeyboardInterrupt:
ret = 0
finally:
# restore old state
termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save)
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save)
return ret
def feed(self, data):
"""
Feed the input stream.
:param data: Input string (unicode).
"""
assert isinstance(data, six.text_type)
if _DEBUG_RENDERER_INPUT:
self.LOG.write(repr(data).encode('utf-8') + b'\n')
self.LOG.flush()
# Handle bracketed paste. (We bypass the parser that matches all other
# key presses and keep reading input until we see the end mark.)
# This is much faster then parsing character by character.
if self._in_bracketed_paste:
self._paste_buffer += data
end_mark = '\x1b[201~'
if end_mark in self._paste_buffer:
end_index = self._paste_buffer.index(end_mark)
# Feed content to key bindings.
paste_content = self._paste_buffer[:end_index]
self.feed_key_callback(KeyPress(Keys.BracketedPaste, paste_content))
# Quit bracketed paste mode and handle remaining input.
self._in_bracketed_paste = False
remaining = self._paste_buffer[end_index + len(end_mark):]
self._paste_buffer = ''
self.feed(remaining)
# Handle normal input character by character.
else:
for i, c in enumerate(data):
if self._in_bracketed_paste:
# Quit loop and process from this position when the parser
# entered bracketed paste.
self.feed(data[i:])
break
else:
# Replace \r by \n. (Some clients send \r instead of \n
# when enter is pressed. E.g. telnet and some other
# terminals.)
# XXX: We should remove this in a future version. It *is*
# now possible to recognise the difference.
# (We remove ICRNL/INLCR/IGNCR below.)
# However, this breaks IPython and maybe other applications,
# because they bind ControlJ (\n) for handling the Enter key.
# When this is removed, replace Enter=ControlJ by
# Enter=ControlM in keys.py.
if c == '\r':
c = '\n'
self._input_parser.send(c)
def feed(self, data):
"""
Feed the input stream.
:param data: Input string (unicode).
"""
assert isinstance(data, six.text_type)
if _DEBUG_RENDERER_INPUT:
self.LOG.write(repr(data).encode('utf-8') + b'\n')
self.LOG.flush()
# Handle bracketed paste. (We bypass the parser that matches all other
# key presses and keep reading input until we see the end mark.)
# This is much faster then parsing character by character.
if self._in_bracketed_paste:
self._paste_buffer += data
end_mark = '\x1b[201~'
if end_mark in self._paste_buffer:
end_index = self._paste_buffer.index(end_mark)
# Feed content to key bindings.
paste_content = self._paste_buffer[:end_index]
self.feed_key_callback(KeyPress(Keys.BracketedPaste, paste_content))
# Quit bracketed paste mode and handle remaining input.
self._in_bracketed_paste = False
remaining = self._paste_buffer[end_index + len(end_mark):]
self._paste_buffer = ''
self.feed(remaining)
# Handle normal input character by character.
else:
for i, c in enumerate(data):
if self._in_bracketed_paste:
# Quit loop and process from this position when the parser
# entered bracketed paste.
self.feed(data[i:])
break
else:
# Replace \r by \n. (Some clients send \r instead of \n
# when enter is pressed. E.g. telnet and some other
# terminals.)
# XXX: We should remove this in a future version. It *is*
# now possible to recognise the difference.
# (We remove ICRNL/INLCR/IGNCR below.)
# However, this breaks IPython and maybe other applications,
# because they bind ControlJ (\n) for handling the Enter key.
# When this is removed, replace Enter=ControlJ by
# Enter=ControlM in keys.py.
if c == '\r':
c = '\n'
self._input_parser.send(c)
def key_get() -> str:
"""
Waits for a single keypress on stdin.
This is a silly function to call if you need to do it a lot because it has
to store stdin's current setup, setup stdin for reading single keystrokes
then read the single keystroke then revert stdin back after reading the
keystroke.
Returns the character of the key that was pressed (zero on
KeyboardInterrupt which can happen when a signal gets handled)
Reference (StackOverflow):
/questions/983354/how-do-i-make-python-to-wait-for-a-pressed-key
"""
if "posix" == os.name:
fd = sys.stdin.fileno()
# save old state
flags_save = fcntl.fcntl(fd, fcntl.F_GETFL)
attrs_save = termios.tcgetattr(fd)
# make raw - the way to do this comes from the termios(3) man page.
attrs = list(attrs_save) # copy the stored version to update
# iflag
attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK
| termios.ISTRIP | termios.INLCR | termios. IGNCR
| termios.ICRNL | termios.IXON)
# oflag
attrs[1] &= ~termios.OPOST
# cflag
attrs[2] &= ~(termios.CSIZE | termios. PARENB)
attrs[2] |= termios.CS8
# lflag
attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON
| termios.ISIG | termios.IEXTEN)
termios.tcsetattr(fd, termios.TCSANOW, attrs)
# turn off non-blocking
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK)
# read a single keystroke
try:
ret = sys.stdin.read(1) # returns a single character
except KeyboardInterrupt:
ret = str()
finally:
# restore old state
termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save)
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save)
return ret
elif "nt" == os.name:
try:
# 'getch' by default returns a 'bytes' object;
# so an extra conversion is required
ret = msvcrt.getch().decode()
except KeyboardInterrupt:
ret = str()
return ret
# -------------------------------- FUNCTIONS ----------------------------------
def feed(self, data):
"""
Feed the input stream.
:param data: Input string (unicode).
"""
assert isinstance(data, six.text_type)
if _DEBUG_RENDERER_INPUT:
self.LOG.write(repr(data).encode('utf-8') + b'\n')
self.LOG.flush()
# Handle bracketed paste. (We bypass the parser that matches all other
# key presses and keep reading input until we see the end mark.)
# This is much faster then parsing character by character.
if self._in_bracketed_paste:
self._paste_buffer += data
end_mark = '\x1b[201~'
if end_mark in self._paste_buffer:
end_index = self._paste_buffer.index(end_mark)
# Feed content to key bindings.
paste_content = self._paste_buffer[:end_index]
self.feed_key_callback(KeyPress(Keys.BracketedPaste, paste_content))
# Quit bracketed paste mode and handle remaining input.
self._in_bracketed_paste = False
remaining = self._paste_buffer[end_index + len(end_mark):]
self._paste_buffer = ''
self.feed(remaining)
# Handle normal input character by character.
else:
for i, c in enumerate(data):
if self._in_bracketed_paste:
# Quit loop and process from this position when the parser
# entered bracketed paste.
self.feed(data[i:])
break
else:
# Replace \r by \n. (Some clients send \r instead of \n
# when enter is pressed. E.g. telnet and some other
# terminals.)
# XXX: We should remove this in a future version. It *is*
# now possible to recognise the difference.
# (We remove ICRNL/INLCR/IGNCR below.)
# However, this breaks IPython and maybe other applications,
# because they bind ControlJ (\n) for handling the Enter key.
# When this is removed, replace Enter=ControlJ by
# Enter=ControlM in keys.py.
if c == '\r':
c = '\n'
self._input_parser.send(c)
def feed(self, data):
"""
Feed the input stream.
:param data: Input string (unicode).
"""
assert isinstance(data, six.text_type)
if _DEBUG_RENDERER_INPUT:
self.LOG.write(repr(data).encode('utf-8') + b'\n')
self.LOG.flush()
# Handle bracketed paste. (We bypass the parser that matches all other
# key presses and keep reading input until we see the end mark.)
# This is much faster then parsing character by character.
if self._in_bracketed_paste:
self._paste_buffer += data
end_mark = '\x1b[201~'
if end_mark in self._paste_buffer:
end_index = self._paste_buffer.index(end_mark)
# Feed content to key bindings.
paste_content = self._paste_buffer[:end_index]
self.feed_key_callback(KeyPress(Keys.BracketedPaste, paste_content))
# Quit bracketed paste mode and handle remaining input.
self._in_bracketed_paste = False
remaining = self._paste_buffer[end_index + len(end_mark):]
self._paste_buffer = ''
self.feed(remaining)
# Handle normal input character by character.
else:
for i, c in enumerate(data):
if self._in_bracketed_paste:
# Quit loop and process from this position when the parser
# entered bracketed paste.
self.feed(data[i:])
break
else:
# Replace \r by \n. (Some clients send \r instead of \n
# when enter is pressed. E.g. telnet and some other
# terminals.)
# XXX: We should remove this in a future version. It *is*
# now possible to recognise the difference.
# (We remove ICRNL/INLCR/IGNCR below.)
# However, this breaks IPython and maybe other applications,
# because they bind ControlJ (\n) for handling the Enter key.
# When this is removed, replace Enter=ControlJ by
# Enter=ControlM in keys.py.
if c == '\r':
c = '\n'
self._input_parser.send(c)
def feed(self, data):
"""
Feed the input stream.
:param data: Input string (unicode).
"""
assert isinstance(data, six.text_type)
if _DEBUG_RENDERER_INPUT:
self.LOG.write(repr(data).encode('utf-8') + b'\n')
self.LOG.flush()
# Handle bracketed paste. (We bypass the parser that matches all other
# key presses and keep reading input until we see the end mark.)
# This is much faster then parsing character by character.
if self._in_bracketed_paste:
self._paste_buffer += data
end_mark = '\x1b[201~'
if end_mark in self._paste_buffer:
end_index = self._paste_buffer.index(end_mark)
# Feed content to key bindings.
paste_content = self._paste_buffer[:end_index]
self.feed_key_callback(KeyPress(Keys.BracketedPaste, paste_content))
# Quit bracketed paste mode and handle remaining input.
self._in_bracketed_paste = False
remaining = self._paste_buffer[end_index + len(end_mark):]
self._paste_buffer = ''
self.feed(remaining)
# Handle normal input character by character.
else:
for i, c in enumerate(data):
if self._in_bracketed_paste:
# Quit loop and process from this position when the parser
# entered bracketed paste.
self.feed(data[i:])
break
else:
# Replace \r by \n. (Some clients send \r instead of \n
# when enter is pressed. E.g. telnet and some other
# terminals.)
# XXX: We should remove this in a future version. It *is*
# now possible to recognise the difference.
# (We remove ICRNL/INLCR/IGNCR below.)
# However, this breaks IPython and maybe other applications,
# because they bind ControlJ (\n) for handling the Enter key.
# When this is removed, replace Enter=ControlJ by
# Enter=ControlM in keys.py.
if c == '\r':
c = '\n'
self._input_parser.send(c)
