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178 lines (158 loc) · 6.36 KB
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# The MIT License
#
# Copyright (c) 2009-2012 the bpython authors.
#
# 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 with_statement
import __builtin__
import rlcompleter
import re
from bpython import inspection
# Needed for special handling of __abstractmethods__
# abc only exists since 2.6, so check both that it exists and that it's
# the one we're expecting
try:
import abc
abc.ABCMeta
has_abc = True
except (ImportError, AttributeError):
has_abc = False
# Autocomplete modes
SIMPLE = 'simple'
SUBSTRING = 'substring'
FUZZY = 'fuzzy'
class Autocomplete(rlcompleter.Completer):
"""
"""
def __init__(self, namespace = None, config = None):
rlcompleter.Completer.__init__(self, namespace)
self.locals = namespace
if hasattr(config, 'autocomplete_mode'):
self.autocomplete_mode = config.autocomplete_mode
else:
self.autocomplete_mode = SUBSTRING
def complete(self, text, state):
"""Return the next possible completion for 'text'.
This is called successively with state == 0, 1, 2, ... until it
returns None. The completion should begin with 'text'.
"""
if self.use_main_ns:
self.namespace = __main__.__dict__
dictpattern = re.compile('[^\[\]]+\[$')
def complete_dict(text):
lastbracket_index = text.rindex('[')
dexpr = text[:lastbracket_index].lstrip()
obj = eval(dexpr, self.locals)
if obj and isinstance(obj, type({})) and obj.keys():
self.matches = [dexpr + "[{!r}]".format(k) for k in obj.keys()]
else:
# empty dictionary
self.matches = []
if state == 0:
if "." in text:
if dictpattern.match(text):
complete_dict(text)
else:
# Examples: 'foo.b' or 'foo[bar.'
for i in range(1, len(text) + 1):
if text[-i] == '[':
i -= 1
break
methodtext = text[-i:]
self.matches = [''.join([text[:-i], m]) for m in
self.attr_matches(methodtext)]
elif dictpattern.match(text):
complete_dict(text)
else:
self.matches = self.global_matches(text)
try:
return self.matches[state]
except IndexError:
return None
def attr_matches(self, text):
"""Taken from rlcompleter.py and bent to my will.
"""
# Gna, Py 2.6's rlcompleter searches for __call__ inside the
# instance instead of the type, so we monkeypatch to prevent
# side-effects (__getattr__/__getattribute__)
m = re.match(r"(\w+(\.\w+)*)\.(\w*)", text)
if not m:
return []
expr, attr = m.group(1, 3)
if expr.isdigit():
# Special case: float literal, using attrs here will result in
# a SyntaxError
return []
obj = eval(expr, self.locals)
with inspection.AttrCleaner(obj):
matches = self.attr_lookup(obj, expr, attr)
return matches
def attr_lookup(self, obj, expr, attr):
"""Second half of original attr_matches method factored out so it can
be wrapped in a safe try/finally block in case anything bad happens to
restore the original __getattribute__ method."""
words = dir(obj)
if hasattr(obj, '__class__'):
words.append('__class__')
words = words + rlcompleter.get_class_members(obj.__class__)
if has_abc and not isinstance(obj.__class__, abc.ABCMeta):
try:
words.remove('__abstractmethods__')
except ValueError:
pass
matches = []
n = len(attr)
for word in words:
if self.method_match(word, n, attr) and word != "__builtins__":
matches.append("%s.%s" % (expr, word))
return matches
def _callable_postfix(self, value, word):
"""rlcompleter's _callable_postfix done right."""
with inspection.AttrCleaner(value):
if inspection.is_callable(value):
word += '('
return word
def global_matches(self, text):
"""Compute matches when text is a simple name.
Return a list of all keywords, built-in functions and names currently
defined in self.namespace that match.
"""
hash = {}
n = len(text)
import keyword
for word in keyword.kwlist:
if self.method_match(word, n, text):
hash[word] = 1
for nspace in [__builtin__.__dict__, self.namespace]:
for word, val in nspace.items():
if self.method_match(word, len(text), text) and word != "__builtins__":
hash[self._callable_postfix(val, word)] = 1
matches = hash.keys()
matches.sort()
return matches
def method_match(self, word, size, text):
if self.autocomplete_mode == SIMPLE:
return word[:size] == text
elif self.autocomplete_mode == SUBSTRING:
s = r'.*%s.*' % text
return re.search(s, word)
else:
s = r'.*%s.*' % '.*'.join(list(text))
return re.search(s, word)