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# vim:fileencoding=utf-8:noet
from __future__ import (unicode_literals, division, absolute_import, print_function)
import sys
from pkgutil import extend_path
from types import MethodType
__path__ = extend_path(__path__, __name__)
class Segment(object):
'''Base class for any segment that is not a function
Required for powerline.lint.inspect to work properly: it defines methods for
omitting existing or adding new arguments.
.. note::
Until python-3.4 ``inspect.getargspec`` does not support querying
callable classes for arguments of their ``__call__`` method, requiring
to use this method directly (i.e. before 3.4 you should write
``getargspec(obj.__call__)`` in place of ``getargspec(obj)``).
'''
if sys.version_info < (3, 4):
def argspecobjs(self):
yield '__call__', self.__call__
else:
def argspecobjs(self):
yield '__call__', self
argspecobjs.__doc__ = (
'''Return a list of valid arguments for inspect.getargspec
Used to determine function arguments.
'''
)
def omitted_args(self, name, method):
'''List arguments which should be omitted
Returns a tuple with indexes of omitted arguments.
.. note::``segment_info``, ``create_watcher`` and ``pl`` will be omitted
regardless of the below return (for ``segment_info`` and
``create_watcher``: only if object was marked to require segment
info or filesystem watcher).
'''
if isinstance(self.__call__, MethodType):
return (0,)
else:
return ()
@staticmethod
def additional_args():
'''Returns a list of (additional argument name[, default value]) tuples.
'''
return ()
def with_docstring(instance, doc):
instance.__doc__ = doc
return instance
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