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importcompletion.py
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238 lines (201 loc) · 7.33 KB
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# encoding: utf-8
# The MIT License
#
# Copyright (c) 2009-2011 Andreas Stuehrk
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from __future__ import absolute_import
from ._py3compat import py3, try_decode
from .line import (
current_word,
current_import,
current_from_import_from,
current_from_import_import,
)
import os
import sys
import warnings
from six.moves import filter
if py3:
import importlib.machinery
SUFFIXES = importlib.machinery.all_suffixes()
else:
import imp
SUFFIXES = [suffix for suffix, mode, type in imp.get_suffixes()]
# The cached list of all known modules
modules = set()
fully_loaded = False
def module_matches(cw, prefix=""):
"""Modules names to replace cw with"""
full = "%s.%s" % (prefix, cw) if prefix else cw
matches = (
name
for name in modules
if (name.startswith(full) and name.find(".", len(full)) == -1)
)
if prefix:
return set(match[len(prefix) + 1 :] for match in matches)
else:
return set(matches)
def attr_matches(cw, prefix="", only_modules=False):
"""Attributes to replace name with"""
full = "%s.%s" % (prefix, cw) if prefix else cw
module_name, _, name_after_dot = full.rpartition(".")
if module_name not in sys.modules:
return set()
module = sys.modules[module_name]
if only_modules:
matches = (
name
for name in dir(module)
if (
name.startswith(name_after_dot)
and "%s.%s" % (module_name, name)
)
in sys.modules
)
else:
matches = (
name for name in dir(module) if name.startswith(name_after_dot)
)
module_part, _, _ = cw.rpartition(".")
if module_part:
matches = ("%s.%s" % (module_part, m) for m in matches)
generator = (try_decode(match, "ascii") for match in matches)
return set(filter(lambda x: x is not None, generator))
def module_attr_matches(name):
"""Only attributes which are modules to replace name with"""
return attr_matches(name, prefix="", only_modules=True)
def complete(cursor_offset, line):
"""Construct a full list of possibly completions for imports."""
tokens = line.split()
if "from" not in tokens and "import" not in tokens:
return None
result = current_word(cursor_offset, line)
if result is None:
return None
from_import_from = current_from_import_from(cursor_offset, line)
if from_import_from is not None:
import_import = current_from_import_import(cursor_offset, line)
if import_import is not None:
# `from a import <b|>` completion
matches = module_matches(import_import[2], from_import_from[2])
matches.update(attr_matches(import_import[2], from_import_from[2]))
else:
# `from <a|>` completion
matches = module_attr_matches(from_import_from[2])
matches.update(module_matches(from_import_from[2]))
return matches
cur_import = current_import(cursor_offset, line)
if cur_import is not None:
# `import <a|>` completion
matches = module_matches(cur_import[2])
matches.update(module_attr_matches(cur_import[2]))
return matches
else:
return None
def find_modules(path):
"""Find all modules (and packages) for a given directory."""
if not os.path.isdir(path):
# Perhaps a zip file
return
try:
filenames = os.listdir(path)
except EnvironmentError:
filenames = []
if py3:
finder = importlib.machinery.FileFinder(path)
for name in filenames:
if not any(name.endswith(suffix) for suffix in SUFFIXES):
# Possibly a package
if "." in name:
continue
elif os.path.isdir(os.path.join(path, name)):
# Unfortunately, CPython just crashes if there is a directory
# which ends with a python extension, so work around.
continue
for suffix in SUFFIXES:
if name.endswith(suffix):
name = name[: -len(suffix)]
break
if py3 and name == "badsyntax_pep3120":
# Workaround for issue #166
continue
try:
is_package = False
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
if py3:
spec = finder.find_spec(name)
if spec is None:
continue
if spec.submodule_search_locations is not None:
pathname = spec.submodule_search_locations[0]
is_package = True
else:
pathname = spec.origin
else:
fo, pathname, _ = imp.find_module(name, [path])
if fo is not None:
fo.close()
else:
# Yay, package
is_package = True
except (ImportError, IOError, SyntaxError):
continue
except UnicodeEncodeError:
# Happens with Python 3 when there is a filename in some
# invalid encoding
continue
else:
if is_package:
for subname in find_modules(pathname):
if subname != "__init__":
yield "%s.%s" % (name, subname)
yield name
def find_all_modules(path=None):
"""Return a list with all modules in `path`, which should be a list of
directory names. If path is not given, sys.path will be used."""
if path is None:
modules.update(try_decode(m, "ascii") for m in sys.builtin_module_names)
path = sys.path
for p in path:
if not p:
p = os.curdir
for module in find_modules(p):
module = try_decode(module, "ascii")
if module is None:
continue
modules.add(module)
yield
def find_coroutine():
global fully_loaded
if fully_loaded:
return None
try:
next(find_iterator)
except StopIteration:
fully_loaded = True
return True
def reload():
"""Refresh the list of known modules."""
modules.clear()
for _ in find_all_modules():
pass
find_iterator = find_all_modules()