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"""
Module containing various decorators
"""
from poezio import common
class RefreshWrapper(object):
def __init__(self):
self.core = None
def conditional(self, func):
"""
Decorator to refresh the UI if the wrapped function
returns True
"""
def wrap(*args, **kwargs):
ret = func(*args, **kwargs)
if self.core and ret:
self.core.refresh_window()
return ret
return wrap
def always(self, func):
"""
Decorator that refreshs the UI no matter what after the function
"""
def wrap(*args, **kwargs):
ret = func(*args, **kwargs)
if self.core:
self.core.refresh_window()
return ret
return wrap
def update(self, func):
"""
Decorator that only updates the screen
"""
def wrap(*args, **kwargs):
ret = func(*args, **kwargs)
if self.core:
self.core.doupdate()
return ret
return wrap
refresh_wrapper = RefreshWrapper()
class CommandArgParser(object):
"""Modify the string argument of the function into a list of strings
containing the right number of extracted arguments, or None if we don’t
have enough.
"""
@staticmethod
def raw(func):
"""Just call the function with a single string, which is the original string
untouched
"""
def wrap(self, args, *a, **kw):
return func(self, args, *a, **kw)
return wrap
@staticmethod
def ignored(func):
"""
Call the function without any argument
"""
def wrap(self, args=None, *a, **kw):
return func(self, *a, **kw)
return wrap
@staticmethod
def quoted(mandatory, optional=0, defaults=None,
ignore_trailing_arguments=False):
"""The function receives a list with a number of arguments that is between
the numbers `mandatory` and `optional`.
If the string doesn’t contain at least `mandatory` arguments, we return
None because the given arguments are invalid.
If there are any remaining arguments after `mandatory` and `optional`
arguments have been found (and “ignore_trailing_arguments" is not True),
we happen them to the last argument of the list.
An argument is a string (with or without whitespaces) between to quotes
("), or a whitespace separated word (if not inside quotes).
The argument `defaults` is a list of strings that are used when an
optional argument is missing. For example if we accept one optional
argument, zero is available but we have one value in the `defaults`
list, we use that string inplace. The `defaults` list can only
replace missing optional arguments, not mandatory ones. And it
should not contain more than `mandatory` values. Also you cannot
Example:
This method needs at least one argument, and accepts up to 3
arguments
>> @command_args_parser.quoted(1, 2, ['default for first arg'], False)
>> def f(args):
>> print(args)
>> f('coucou les amis') # We have one mandatory and two optional
['coucou', 'les', 'amis']
>> f('"coucou les amis" "PROUT PROUT"') # One mandator and only one optional,
# no default for the second
['coucou les amis', 'PROUT PROUT']
>> f('') # Not enough args for mandatory number
None
>> f('"coucou les potes"') # One mandatory, and use the default value
# for the first optional
['coucou les potes, 'default for first arg']
>> f('"un et demi" deux trois quatre cinq six') # We have three trailing arguments
['un et demi', 'deux', 'trois quatre cinq six']
"""
if defaults is None:
defaults = []
def first(func):
def second(self, args, *a, **kw):
default_args = defaults
if args and args.strip():
args = common.shell_split(args)
else:
args = []
if len(args) < mandatory:
return func(self, None, *a, **kw)
res, args = args[:mandatory], args[mandatory:]
if optional == -1:
opt_args = args[:]
else:
opt_args = args[:optional]
if opt_args:
res += opt_args
args = args[len(opt_args):]
default_args = default_args[len(opt_args):]
res += default_args
if args and res and not ignore_trailing_arguments:
res[-1] += " " + " ".join(args)
return func(self, res, *a, **kw)
return second
return first
command_args_parser = CommandArgParser()
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