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functionutils.py
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functionutils.py
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import rope.base.exceptions
import rope.base.pyobjects
from rope.base.builtins import Lambda
from rope.base import worder
class DefinitionInfo(object):
def __init__(self, function_name, is_method, args_with_defaults,
args_arg, keywords_arg):
self.function_name = function_name
self.is_method = is_method
self.args_with_defaults = args_with_defaults
self.args_arg = args_arg
self.keywords_arg = keywords_arg
def to_string(self):
return '%s(%s)' % (self.function_name, self.arguments_to_string())
def arguments_to_string(self, from_index=0):
params = []
for arg, default in self.args_with_defaults:
if default is not None:
params.append('%s=%s' % (arg, default))
else:
params.append(arg)
if self.args_arg is not None:
params.append('*' + self.args_arg)
if self.keywords_arg:
params.append('**' + self.keywords_arg)
return ', '.join(params[from_index:])
@staticmethod
def _read(pyfunction, code):
kind = pyfunction.get_kind()
is_method = kind == 'method'
is_lambda = kind == 'lambda'
info = _FunctionParser(code, is_method, is_lambda)
args, keywords = info.get_parameters()
args_arg = None
keywords_arg = None
if args and args[-1].startswith('**'):
keywords_arg = args[-1][2:]
del args[-1]
if args and args[-1].startswith('*'):
args_arg = args[-1][1:]
del args[-1]
args_with_defaults = [(name, None) for name in args]
args_with_defaults.extend(keywords)
return DefinitionInfo(info.get_function_name(), is_method,
args_with_defaults, args_arg, keywords_arg)
@staticmethod
def read(pyfunction):
pymodule = pyfunction.get_module()
word_finder = worder.Worder(pymodule.source_code)
lineno = pyfunction.get_ast().lineno
start = pymodule.lines.get_line_start(lineno)
if isinstance(pyfunction, Lambda):
call = word_finder.get_lambda_and_args(start)
else:
call = word_finder.get_function_and_args_in_header(start)
return DefinitionInfo._read(pyfunction, call)
class CallInfo(object):
def __init__(self, function_name, args, keywords, args_arg,
keywords_arg, implicit_arg, constructor):
self.function_name = function_name
self.args = args
self.keywords = keywords
self.args_arg = args_arg
self.keywords_arg = keywords_arg
self.implicit_arg = implicit_arg
self.constructor = constructor
def to_string(self):
function = self.function_name
if self.implicit_arg:
function = self.args[0] + '.' + self.function_name
params = []
start = 0
if self.implicit_arg or self.constructor:
start = 1
if self.args[start:]:
params.extend(self.args[start:])
if self.keywords:
params.extend(['%s=%s' % (name, value)
for name, value in self.keywords])
if self.args_arg is not None:
params.append('*' + self.args_arg)
if self.keywords_arg:
params.append('**' + self.keywords_arg)
return '%s(%s)' % (function, ', '.join(params))
@staticmethod
def read(primary, pyname, definition_info, code):
is_method_call = CallInfo._is_method_call(primary, pyname)
is_constructor = CallInfo._is_class(pyname)
is_classmethod = CallInfo._is_classmethod(pyname)
info = _FunctionParser(code, is_method_call or is_classmethod)
args, keywords = info.get_parameters()
args_arg = None
keywords_arg = None
if args and args[-1].startswith('**'):
keywords_arg = args[-1][2:]
del args[-1]
if args and args[-1].startswith('*'):
args_arg = args[-1][1:]
del args[-1]
if is_constructor:
args.insert(0, definition_info.args_with_defaults[0][0])
return CallInfo(info.get_function_name(), args, keywords, args_arg,
keywords_arg, is_method_call or is_classmethod,
is_constructor)
@staticmethod
def _is_method_call(primary, pyname):
return primary is not None and \
isinstance(primary.get_object().get_type(),
rope.base.pyobjects.PyClass) and \
CallInfo._is_method(pyname)
@staticmethod
def _is_class(pyname):
return pyname is not None and \
isinstance(pyname.get_object(),
rope.base.pyobjects.PyClass)
@staticmethod
def _is_method(pyname):
if pyname is not None and \
isinstance(pyname.get_object(), rope.base.pyobjects.PyFunction):
return pyname.get_object().get_kind() == 'method'
return False
@staticmethod
def _is_classmethod(pyname):
if pyname is not None and \
isinstance(pyname.get_object(), rope.base.pyobjects.PyFunction):
return pyname.get_object().get_kind() == 'classmethod'
return False
class ArgumentMapping(object):
def __init__(self, definition_info, call_info):
self.call_info = call_info
self.param_dict = {}
self.keyword_args = []
self.args_arg = []
for index, value in enumerate(call_info.args):
if index < len(definition_info.args_with_defaults):
name = definition_info.args_with_defaults[index][0]
self.param_dict[name] = value
else:
self.args_arg.append(value)
for name, value in call_info.keywords:
index = -1
for pair in definition_info.args_with_defaults:
if pair[0] == name:
self.param_dict[name] = value
break
else:
self.keyword_args.append((name, value))
def to_call_info(self, definition_info):
args = []
keywords = []
for index in range(len(definition_info.args_with_defaults)):
name = definition_info.args_with_defaults[index][0]
if name in self.param_dict:
args.append(self.param_dict[name])
else:
for i in range(index, len(definition_info.args_with_defaults)):
name = definition_info.args_with_defaults[i][0]
if name in self.param_dict:
keywords.append((name, self.param_dict[name]))
break
args.extend(self.args_arg)
keywords.extend(self.keyword_args)
return CallInfo(self.call_info.function_name, args, keywords,
self.call_info.args_arg, self.call_info.keywords_arg,
self.call_info.implicit_arg,
self.call_info.constructor)
class _FunctionParser(object):
def __init__(self, call, implicit_arg, is_lambda=False):
self.call = call
self.implicit_arg = implicit_arg
self.word_finder = worder.Worder(self.call)
if is_lambda:
self.last_parens = self.call.rindex(':')
else:
self.last_parens = self.call.rindex(')')
self.first_parens = self.word_finder._find_parens_start(
self.last_parens)
def get_parameters(self):
args, keywords = self.word_finder.get_parameters(self.first_parens,
self.last_parens)
if self.is_called_as_a_method():
instance = self.call[:self.call.rindex('.', 0, self.first_parens)]
args.insert(0, instance.strip())
return args, keywords
def get_instance(self):
if self.is_called_as_a_method():
return self.word_finder.get_primary_at(
self.call.rindex('.', 0, self.first_parens) - 1)
def get_function_name(self):
if self.is_called_as_a_method():
return self.word_finder.get_word_at(self.first_parens - 1)
else:
return self.word_finder.get_primary_at(self.first_parens - 1)
def is_called_as_a_method(self):
return self.implicit_arg and '.' in self.call[:self.first_parens]