Source code for pyrocko.get_terminal_size

#
# This file is NOT part of Pyrocko.
#
# Code is considered public domain, based on
# https://gist.github.com/jtriley/1108174

'''
Cross platform get terminal size utilities.
'''

import os
import struct
import platform
import subprocess


def get_terminal_size():
    '''
    Get terminal size.

    Works on linux,os x,windows,cygwin(windows)

    originally retrieved from:
    http://stackoverflow.com/questions/566746/how-to-get-console-window-width-in-python
    '''

    current_os = platform.system()
    tuple_xy = None
    if current_os == 'Windows':
        tuple_xy = _get_terminal_size_windows()
        if tuple_xy is None:
            tuple_xy = _get_terminal_size_tput()
            # needed for window's python in cygwin's xterm!

    if current_os in ['Linux', 'Darwin'] or current_os.startswith('CYGWIN'):
        tuple_xy = _get_terminal_size_linux()

    if tuple_xy is None:
        tuple_xy = (80, 25)      # default value

    return tuple_xy


def _get_terminal_size_windows():
    try:
        from ctypes import windll, create_string_buffer
        # stdin handle is -10
        # stdout handle is -11
        # stderr handle is -12
        h = windll.kernel32.GetStdHandle(-12)
        csbi = create_string_buffer(22)
        res = windll.kernel32.GetConsoleScreenBufferInfo(h, csbi)
        if res:
            (bufx, bufy, curx, cury, wattr,
             left, top, right, bottom,
             maxx, maxy) = struct.unpack('hhhhHhhhhhh', csbi.raw)
            sizex = right - left + 1
            sizey = bottom - top + 1
            return sizex, sizey
    except Exception:
        pass


def _get_terminal_size_tput():
    # get terminal width
    # src: http://stackoverflow.com/questions/263890/how-do-i-find-the-width-height-of-a-terminal-window  # noqa
    try:
        cols = int(subprocess.check_call(['tput' 'cols']))
        rows = int(subprocess.check_call(['tput', 'lines']))
        return (cols, rows)
    except Exception:
        pass


def _get_terminal_size_linux():

    def ioctl_GWINSZ(fd):
        try:
            import fcntl
            import termios
            cr = struct.unpack(
                'hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
            return cr
        except Exception:
            pass

    cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)

    if not cr:
        try:
            fd = os.open(os.ctermid(), os.O_RDONLY)
            cr = ioctl_GWINSZ(fd)
            os.close(fd)
        except Exception:
            pass

    if not cr:
        try:
            cr = (os.environ['LINES'], os.environ['COLUMNS'])
        except Exception:
            return None

    return int(cr[1]), int(cr[0])


if __name__ == '__main__':
    sizex, sizey = get_terminal_size()
    print(sizex, sizey)