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#
# -*- coding: utf-8 -*-
'''# File: utils.py
Utilities to deal with things...
copied/edited from app-portage/layman's xml.py
Copyright:
(c) 2005 - 2008 Gunnar Wrobel
(c) 2009 Sebastian Pipping
(c) 2009 Christian Groschupp
Distributed under the terms of the GNU General Public License v2
Author(s):
Gunnar Wrobel <wrobel@gentoo.org>
Sebastian Pipping <sebastian@pipping.org>
Christian Groschupp <christian@groschupp.org>
Utility functions'''
import types
import re
from snakeoil.demandload import demandload
demandload(
"os",
"sys",
"locale",
"codecs",
)
try:
StringTypes = types.StringTypes
except AttributeError:
StringTypes = [str]
Y_N = ("y", "yes", "n", "no")
def encoder(text, _encoding_):
return codecs.encode(text, _encoding_, 'replace')
def decode_selection(selection):
'''utility function to decode a list of strings
accoring to the filesystem encoding
'''
# fix None passed in, return an empty list
selection = selection or []
enc = sys.getfilesystemencoding()
if enc is not None:
return [encoder(i, enc) for i in selection]
return selection
def get_encoding(output):
if hasattr(output, 'encoding') \
and output.encoding != None:
return output.encoding
else:
encoding = locale.getpreferredencoding()
# Make sure that python knows the encoding. Bug 350156
try:
# We don't care about what is returned, we just want to
# verify that we can find a codec.
codecs.lookup(encoding)
except LookupError:
# Python does not know the encoding, so use utf-8.
encoding = 'utf_8'
return encoding
def pad(string, length):
'''Pad a string with spaces.'''
if len(string) <= length:
return string + ' ' * (length - len(string))
else:
return string[:length - 3] + '...'
def terminal_width():
'''Determine width of terminal window.'''
try:
width = int(os.environ['COLUMNS'])
if width > 0:
return width
except:
pass
try:
import struct, fcntl, termios
query = struct.pack('HHHH', 0, 0, 0, 0)
response = fcntl.ioctl(1, termios.TIOCGWINSZ, query)
width = struct.unpack('HHHH', response)[1]
if width > 0:
return width
except:
pass
return 80
# From <http://effbot.org/zone/element-lib.htm>
# BEGIN
def indent(elem, level=0):
i = "\n" + level*" "
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + " "
if not elem.tail or not elem.tail.strip():
elem.tail = i
for elem in elem:
indent(elem, level+1)
if not elem.tail or not elem.tail.strip():
elem.tail = i
else:
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
# END
def path(path_elements):
'''
Concatenate a path from several elements.
>>> path([])
''
>>> path(['a'])
'a'
>>> path(['a','b'])
'a/b'
>>> path(['a/','b'])
'a/b'
>>> path(['/a/','b'])
'/a/b'
>>> path(['/a/','b/'])
'/a/b'
>>> path(['/a/','b/'])
'/a/b'
>>> path(['/a/','/b/'])
'/a/b'
>>> path(['/a/','/b','c/'])
'/a/b/c'
'''
pathname = ''
if type(path_elements) in StringTypes:
path_elements = [path_elements]
# Concatenate elements and seperate with /
for i in path_elements:
pathname += i + '/'
# Replace multiple consecutive slashes
pathname = re.compile('/+').sub('/', pathname)
# Remove the final / if there is one
if pathname and pathname[-1] == '/':
pathname = pathname[:-1]
return pathname
def get_ack(prompt_msg, accepted=Y_N):
ack = None
while ack not in accepted:
ack = py_input(prompt_msg).lower()
return ack
if __name__ == '__main__':
import doctest
doctest.testmod(sys.modules[__name__])
|
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