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#!/usr/bin/env python
# Copyright (c) 2009, Tim Cuthbertson
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of the organisation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
# WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import sys
class Style(object):
prefix='\x1b['
suffix='m'
enabled = True
def __init__(self, on_codes, off_codes = 0):
self._on = self.sequence(on_codes)
self._off = self.sequence(off_codes)
def _get_on(self): return self._on if self.enabled else ''
def _get_off(self): return self._off if self.enabled else ''
on = property(_get_on)
off = property(_get_off)
@classmethod
def sequence(cls, codes):
wrap_single = lambda code: "%s%s%s" % (cls.prefix, code, cls.suffix)
try:
return ''.join([wrap_single(code) for code in codes])
except TypeError:
return wrap_single(codes)
def __str__(self):
if not self.enabled:
return ''
return self.on
def __call__(self, *args):
contents = ''.join(["%s%s" % (self.on, arg) for arg in args])
return "%s%s" % (contents, self.off)
def auto():
"""set colouring on if STDOUT is a terminal device, off otherwise"""
try:
Style.enabled = False
Style.enabled = sys.stdout.isatty()
except (AttributeError, TypeError):
pass
def enable():
"""force coloured output"""
Style.enabled = True
def disable():
"""disable coloured output"""
Style.enabled = False
default = reset = Style(0)
black = Style(30)
red = Style(31)
green = Style(32)
yellow = Style(33)
blue = Style(34)
magenta = Style(35)
cyan = Style(36)
white = Style(37)
bg_black = Style(40)
bg_red = Style(41)
bg_green = Style(42)
bg_yellow = Style(43)
bg_blue = Style(44)
bg_magenta = Style(45)
bg_cyan = Style(46)
bg_white = Style(47)
bg_default = Style(49)
bold = Style(1)
underscore = Style(4)
inverted = Style(7)
italic = Style(3)
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