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importinfo.py
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201 lines (152 loc) · 5.62 KB
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class ImportStatement(object):
"""Represent an import in a module
`readonly` attribute controls whether this import can be changed
by import actions or not.
"""
def __init__(self, import_info, start_line, end_line,
main_statement=None, blank_lines=0):
self.start_line = start_line
self.end_line = end_line
self.readonly = False
self.main_statement = main_statement
self._import_info = None
self.import_info = import_info
self._is_changed = False
self.new_start = None
self.blank_lines = blank_lines
def _get_import_info(self):
return self._import_info
def _set_import_info(self, new_import):
if not self.readonly and \
new_import is not None and not new_import == self._import_info:
self._is_changed = True
self._import_info = new_import
import_info = property(_get_import_info, _set_import_info)
def get_import_statement(self):
if self._is_changed or self.main_statement is None:
return self.import_info.get_import_statement()
else:
return self.main_statement
def empty_import(self):
self.import_info = ImportInfo.get_empty_import()
def move(self, lineno, blank_lines=0):
self.new_start = lineno
self.blank_lines = blank_lines
def get_old_location(self):
return self.start_line, self.end_line
def get_new_start(self):
return self.new_start
def is_changed(self):
return self._is_changed or (self.new_start is not None or
self.new_start != self.start_line)
def accept(self, visitor):
return visitor.dispatch(self)
class ImportInfo(object):
def get_imported_primaries(self, context):
pass
def get_imported_names(self, context):
return [primary.split('.')[0]
for primary in self.get_imported_primaries(context)]
def get_import_statement(self):
pass
def is_empty(self):
pass
def __hash__(self):
return hash(self.get_import_statement())
def _are_name_and_alias_lists_equal(self, list1, list2):
if len(list1) != len(list2):
return False
for pair1, pair2 in zip(list1, list2):
if pair1 != pair2:
return False
return True
def __eq__(self, obj):
return isinstance(obj, self.__class__) and \
self.get_import_statement() == obj.get_import_statement()
def __ne__(self, obj):
return not self.__eq__(obj)
@staticmethod
def get_empty_import():
return EmptyImport()
class NormalImport(ImportInfo):
def __init__(self, names_and_aliases):
self.names_and_aliases = names_and_aliases
def get_imported_primaries(self, context):
result = []
for name, alias in self.names_and_aliases:
if alias:
result.append(alias)
else:
result.append(name)
return result
def get_import_statement(self):
result = 'import '
for name, alias in self.names_and_aliases:
result += name
if alias:
result += ' as ' + alias
result += ', '
return result[:-2]
def is_empty(self):
return len(self.names_and_aliases) == 0
class FromImport(ImportInfo):
def __init__(self, module_name, level, names_and_aliases):
self.module_name = module_name
self.level = level
self.names_and_aliases = names_and_aliases
def get_imported_primaries(self, context):
if self.names_and_aliases[0][0] == '*':
module = self.get_imported_module(context)
return [name for name in module
if not name.startswith('_')]
result = []
for name, alias in self.names_and_aliases:
if alias:
result.append(alias)
else:
result.append(name)
return result
def get_imported_resource(self, context):
"""Get the imported resource
Returns `None` if module was not found.
"""
if self.level == 0:
return context.project.find_module(
self.module_name, folder=context.folder)
else:
return context.project.find_relative_module(
self.module_name, context.folder, self.level)
def get_imported_module(self, context):
"""Get the imported `PyModule`
Raises `rope.base.exceptions.ModuleNotFoundError` if module
could not be found.
"""
if self.level == 0:
return context.project.get_module(
self.module_name, context.folder)
else:
return context.project.get_relative_module(
self.module_name, context.folder, self.level)
def get_import_statement(self):
result = 'from ' + '.' * self.level + self.module_name + ' import '
for name, alias in self.names_and_aliases:
result += name
if alias:
result += ' as ' + alias
result += ', '
return result[:-2]
def is_empty(self):
return len(self.names_and_aliases) == 0
def is_star_import(self):
return len(self.names_and_aliases) > 0 and \
self.names_and_aliases[0][0] == '*'
class EmptyImport(ImportInfo):
names_and_aliases = []
def is_empty(self):
return True
def get_imported_primaries(self, context):
return []
class ImportContext(object):
def __init__(self, project, folder):
self.project = project
self.folder = folder