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93 lines
2.5 KiB
93 lines
2.5 KiB
#-*- coding: utf-8 -*-
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# Copyright 2014 Calculate Ltd. http://www.calculate-linux.org
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import curses
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from os import environ, path
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import os
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import sys
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import struct
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import fcntl
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import termios
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from calculate.lib.utils.tools import Singleton, ignore
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class Terminal(object):
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__metaclass__ = Singleton
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WRONG = -1
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def __init__(self):
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try:
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curses.setupterm(environ.get('TERM', 'linux'))
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self.curses = curses
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except curses.error:
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self.curses = None
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self.__echo = True
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self.__cursor = True
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@property
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def colors(self):
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if self.curses:
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return self.curses.tigetnum('colors')
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else:
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return 16
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@property
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def width(self):
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s = struct.pack("HHHH", 0, 0, 0, 0)
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fd_stdout = sys.stdout.fileno()
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try:
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x = fcntl.ioctl(fd_stdout, termios.TIOCGWINSZ, s)
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except IOError:
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# если ошибка то ширина 80 символов
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return -1
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#(rows, cols, x pixels, y pixels)
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return struct.unpack("HHHH", x)[1]
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def is_boot_console(self):
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stdout_file = '/proc/self/fd/0'
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if path.exists(stdout_file):
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return os.readlink(stdout_file) == '/dev/console'
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return False
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@property
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def echo(self):
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return self.__echo
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@echo.setter
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def echo(self, flag):
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fd = sys.stdin.fileno()
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with ignore(termios.error):
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old = termios.tcgetattr(fd)
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if flag:
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old[3] = old[3] | termios.ECHO
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else:
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old[3] = old[3] & ~termios.ECHO
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termios.tcsetattr(fd, termios.TCSADRAIN, old)
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self.__echo = flag
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@property
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def cursor(self):
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return self.__cursor
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@cursor.setter
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def cursor(self, flag):
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if self.curses:
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param = "cnorm" if flag else "civis"
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sys.stdout.write(self.curses.tigetstr(param))
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sys.stdout.flush()
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self.__cursor = flag
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