~bzr-pqm/bzr/bzr.dev

"""

Set of functions to work with console on Windows.

Author: Alexander Belchenko (e-mail: bialix AT ukr.net)

License: Public domain

"""

import struct

# We can cope without it; use a separate variable to help pyflakes

try:

   import ctypes

   has_ctypes = True

except ImportError:

    has_ctypes = False

WIN32_STDIN_HANDLE = -10

WIN32_STDOUT_HANDLE = -11

WIN32_STDERR_HANDLE = -12

def get_console_size(defaultx=80, defaulty=25):

   """ Return size of current console.

   This function try to determine actual size of current working

   console window and return tuple (sizex, sizey) if success,

   or default size (defaultx, defaulty) otherwise.

   Dependencies: ctypes should be installed.

   """

   if not has_ctypes:

       # no ctypes is found

       return (defaultx, defaulty)

   # To avoid problem with redirecting output via pipe

   # need to use stderr instead of stdout

   h = ctypes.windll.kernel32.GetStdHandle(WIN32_STDERR_HANDLE)

   csbi = ctypes.create_string_buffer(22)

   res = ctypes.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)

   else:

       return (defaultx, defaulty)