bpython/bpython/autocomplete.py at 0.13-bugfix · optionalg/bpython · GitHub

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# The MIT License

# 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)

bpython/bpython/autocomplete.py at 0.13-bugfix · optionalg/bpython · GitHub

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