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from __future__ import absolute_import
from __future__ import division
import functools
import os
import sys
import types
from pwnlib.term import termcap
def eval_when(when):
if hasattr(when, 'isatty') or \
when in ('always', 'never', 'auto', sys.stderr, sys.stdout):
if os.environ.get('PWNLIB_COLOR') == 'always' or when == 'always':
return True
elif when == 'never':
return False
elif when == 'auto':
return sys.stdout.isatty()
else:
return when.isatty()
else:
raise ValueError('text.when: must be a file-object or "always", "never" or "auto"')
class Module(types.ModuleType):
def __init__(self):
self.__file__ = __file__
self.__name__ = __name__
self.num_colors = termcap.get('colors', default=8) if sys.platform == 'win32' else 8
self.when = 'auto'
self._colors = {
'black': 0,
'red': 1,
'green': 2,
'yellow': 3,
'blue': 4,
'magenta': 5,
'cyan': 6,
'white': 7,
}
self._reset = termcap.get('reset')
self._attributes = {}
for x, y in [('italic' , 'sitm'),
('bold' , 'bold'),
('underline', 'smul'),
('reverse' , 'rev')]:
s = termcap.get(y)
if not hasattr(s, 'encode'):
s = s.decode('utf-8')
self._attributes[x] = s
self._cache = {}
@property
def when(self):
return self._when
@when.setter
def when(self, val):
self._when = eval_when(val)
@property
def has_bright(self):
return self.num_colors >= 16
@property
def has_gray(self):
return self.has_bright
def _fg_color(self, c):
c = termcap.get('setaf', c) or termcap.get('setf', c)
if not hasattr(c, 'encode'):
c = c.decode('utf-8')
return c
def _bg_color(self, c):
c = termcap.get('setab', c) or termcap.get('setb', c)
if not hasattr(c, 'encode'):
c = c.decode('utf-8')
return c
def _decorator(self, desc, init):
def f(self, s, when = None):
if when:
if eval_when(when):
return init + s + self._reset
else:
return s
else:
if self.when:
return init + s + self._reset
else:
return s
setattr(Module, desc, f)
return functools.partial(f, self)
def __getattr__(self, desc):
if desc.startswith('_'):
raise AttributeError(desc)
try:
ds = desc.replace('gray', 'bright_black').split('_')
init = ''
while ds:
d = ds[0]
try:
init += self._attributes[d]
ds.pop(0)
except KeyError:
break
def c():
bright = 0
c = ds.pop(0)
if c == 'bright':
c = ds.pop(0)
if self.has_bright:
bright = 8
return self._colors[c] + bright
if ds:
if ds[0] == 'on':
ds.pop(0)
init += self._bg_color(c())
else:
init += self._fg_color(c())
if len(ds):
assert ds.pop(0) == 'on'
init += self._bg_color(c())
return self._decorator(desc, init)
except (IndexError, KeyError):
raise AttributeError("'module' object has no attribute %r" % desc)
def get(self, desc):
return self.__getattr__(desc)
tether = sys.modules[__name__]
sys.modules[__name__] = Module()
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