text: # coding: utf-8
  
  # The MIT License
  #
  # Copyright (c) 2009-2015 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 unicode_literals, absolute_import
  
  import __main__
  import abc
  import glob
  import keyword
  import logging
  import os
  import re
  import rlcompleter
  from six.moves import range, builtins
  from six import string_types, iteritems
  
  from . import inspection
  from . import importcompletion
  from . import line as lineparts
  from .line import LinePart
  from ._py3compat import py3, try_decode
  from .lazyre import LazyReCompile
  from .simpleeval import (safe_eval, evaluate_current_expression,
                           EvaluationError)
  
  if not py3:
      from types import InstanceType, ClassType
  
  
  # Autocomplete modes
  SIMPLE = 'simple'
  SUBSTRING = 'substring'
  FUZZY = 'fuzzy'
  
  ALL_MODES = (SIMPLE, SUBSTRING, FUZZY)
  
  MAGIC_METHODS = tuple("__%s__" % s for s in (
      "init", "repr", "str", "lt", "le", "eq", "ne", "gt", "ge", "cmp", "hash",
      "nonzero", "unicode", "getattr", "setattr", "get", "set", "call", "len",
      "getitem", "setitem", "iter", "reversed", "contains", "add", "sub", "mul",
      "floordiv", "mod", "divmod", "pow", "lshift", "rshift", "and", "xor", "or",
      "div", "truediv", "neg", "pos", "abs", "invert", "complex", "int", "float",
      "oct", "hex", "index", "coerce", "enter", "exit"))
  
  if py3:
      KEYWORDS = frozenset(keyword.kwlist)
  else:
      KEYWORDS = frozenset(name.decode('ascii') for name in keyword.kwlist)
  
  
  def after_last_dot(name):
      return name.rstrip('.').rsplit('.')[-1]
  
  
  def few_enough_underscores(current, match):
      """Returns whether match should be shown based on current
  
      if current is _, True if match starts with 0 or 1 underscore
      if current is __, True regardless of match
      otherwise True if match does not start with any underscore
      """
      if current.startswith('__'):
          return True
      elif current.startswith('_') and not match.startswith('__'):
          return True
      elif match.startswith('_'):
          return False
      else:
          return True
  
  
  def method_match_simple(word, size, text):
      return word[:size] == text
  
  
  def method_match_substring(word, size, text):
      return text in word
  
  
  def method_match_fuzzy(word, size, text):
      s = r'.*%s.*' % '.*'.join(list(text))
      return re.search(s, word)
  
  
  MODES_MAP = {
      SIMPLE: method_match_simple,
      SUBSTRING: method_match_substring,
      FUZZY: method_match_fuzzy
  }
  
  
  class BaseCompletionType(object):
      """Describes different completion types"""
  
      def __init__(self, shown_before_tab=True, mode=SIMPLE):
          self._shown_before_tab = shown_before_tab
          self.method_match = MODES_MAP[mode]
  
      def matches(self, cursor_offset, line, **kwargs):
          """Returns a list of possible matches given a line and cursor, or None
          if this completion type isn't applicable.
  
          ie, import completion doesn't make sense if there cursor isn't after
          an import or from statement, so it ought to return None.
  
          Completion types are used to:
              * `locate(cur, line)` their initial target word to replace given a
                line and cursor
              * find `matches(cur, line)` that might replace that word
              * `format(match)` matches to be displayed to the user
              * determine whether suggestions should be `shown_before_tab`
              * `substitute(cur, line, match)` in a match for what's found with
                `target`
              """
          raise NotImplementedError
  
      def locate(self, cursor_offset, line):
          """Returns a Linepart namedtuple instance or None given cursor and line
  
          A Linepart namedtuple contains a start, stop, and word. None is
          returned if no target for this type of completion is found under
          the cursor."""
          raise NotImplementedError
  
      def format(self, word):
          return word
  
      def substitute(self, cursor_offset, line, match):
          """Returns a cursor offset and line with match swapped in"""
          lpart = self.locate(cursor_offset, line)
          offset = lpart.start + len(match)
          changed_line = line[:lpart.start] + match + line[lpart.end:]
          return offset, changed_line
  
      @property
      def shown_before_tab(self):
          """Whether suggestions should be shown before the user hits tab, or only
          once that has happened."""
          return self._shown_before_tab
  
  
  class CumulativeCompleter(BaseCompletionType):
      """Returns combined matches from several completers"""
  
      def __init__(self, completers, mode=SIMPLE):
          if not completers:
              raise ValueError(
                  "CumulativeCompleter requires at least one completer")
          self._completers = completers
  
          super(CumulativeCompleter, self).__init__(True, mode)
  
      def locate(self, current_offset, line):
          return self._completers[0].locate(current_offset, line)
  
      def format(self, word):
          return self._completers[0].format(word)
  
      def matches(self, cursor_offset, line, **kwargs):
          return_value = None
          all_matches = set()
          for completer in self._completers:
              matches = completer.matches(cursor_offset=cursor_offset,
                                          line=line,
                                          **kwargs)
              if matches is not None:
                  all_matches.update(matches)
                  return_value = all_matches
  
          return return_value
  
  
  class ImportCompletion(BaseCompletionType):
  
      def matches(self, cursor_offset, line, **kwargs):
          return importcompletion.complete(cursor_offset, line)
  
      def locate(self, current_offset, line):
          return lineparts.current_word(current_offset, line)
  
      def format(self, word):
          return after_last_dot(word)
  
  
  class FilenameCompletion(BaseCompletionType):
  
      def __init__(self, mode=SIMPLE):
          super(FilenameCompletion, self).__init__(False, mode)
  
      if py3:
          def safe_glob(self, pathname):
              return glob.iglob(glob.escape(pathname) + '*')
      else:
          def safe_glob(self, pathname):
              try:
                  return glob.glob(pathname + '*')
              except re.error:
                  # see #491
                  return tuple()
  
      def matches(self, cursor_offset, line, **kwargs):
          cs = lineparts.current_string(cursor_offset, line)
          if cs is None:
              return None
          matches = set()
          username = cs.word.split(os.path.sep, 1)[0]
          user_dir = os.path.expanduser(username)
          for filename in self.safe_glob(os.path.expanduser(cs.word)):
              if os.path.isdir(filename):
                  filename += os.path.sep
              if cs.word.startswith('~'):
                  filename = username + filename[len(user_dir):]
              matches.add(filename)
          return matches
  
      def locate(self, current_offset, line):
          return lineparts.current_string(current_offset, line)
  
      def format(self, filename):
          filename.rstrip(os.sep).rsplit(os.sep)[-1]
          if os.sep in filename[:-1]:
              return filename[filename.rindex(os.sep, 0, -1) + 1:]
          else:
              return filename
  
  
  class AttrCompletion(BaseCompletionType):
  
      attr_matches_re = LazyReCompile(r"(\w+(\.\w+)*)\.(\w*)")
  
      def matches(self, cursor_offset, line, **kwargs):
          if 'locals_' not in kwargs:
              return None
          locals_ = kwargs['locals_']
  
          r = self.locate(cursor_offset, line)
          if r is None:
              return None
  
          if locals_ is None:  # TODO add a note about why
              locals_ = __main__.__dict__
  
          assert '.' in r.word
  
          for i in range(1, len(r.word) + 1):
              if r.word[-i] == '[':
                  i -= 1
                  break
          methodtext = r.word[-i:]
          matches = set(''.join([r.word[:-i], m])
                        for m in self.attr_matches(methodtext, locals_))
  
          return set(m for m in matches
                     if few_enough_underscores(r.word.split('.')[-1],
                                               m.split('.')[-1]))
  
      def locate(self, current_offset, line):
          return lineparts.current_dotted_attribute(current_offset, line)
  
      def format(self, word):
          return after_last_dot(word)
  
      def attr_matches(self, text, namespace):
          """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 = self.attr_matches_re.match(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 []
          try:
              obj = safe_eval(expr, namespace)
          except EvaluationError:
              return []
          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 = self.list_attributes(obj)
          if hasattr(obj, '__class__'):
              words.append('__class__')
              words = words + rlcompleter.get_class_members(obj.__class__)
              if not isinstance(obj.__class__, abc.ABCMeta):
                  try:
                      words.remove('__abstractmethods__')
                  except ValueError:
                      pass
  
          if not py3 and isinstance(obj, (InstanceType, ClassType)):
              # Account for the __dict__ in an old-style class.
              words.append('__dict__')
  
          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
  
      if py3:
          def list_attributes(self, obj):
              return dir(obj)
      else:
          def list_attributes(self, obj):
              if isinstance(obj, InstanceType):
                  try:
                      return dir(obj)
                  except Exception:
                      # This is a case where we can not prevent user code from
                      # running. We return a default list attributes on error
                      # instead. (#536)
                      return ['__doc__', '__module__']
              else:
                  return dir(obj)
  
  
  class DictKeyCompletion(BaseCompletionType):
  
      def matches(self, cursor_offset, line, **kwargs):
          if 'locals_' not in kwargs:
              return None
          locals_ = kwargs['locals_']
  
          r = self.locate(cursor_offset, line)
          if r is None:
              return None
          _, _, dexpr = lineparts.current_dict(cursor_offset, line)
          try:
              obj = safe_eval(dexpr, locals_)
          except EvaluationError:
              return None
          if isinstance(obj, dict) and obj.keys():
              matches = set("{0!r}]".format(k) for k in obj.keys()
                            if repr(k).startswith(r.word))
              return matches if matches else None
          else:
              return None
  
      def locate(self, current_offset, line):
          return lineparts.current_dict_key(current_offset, line)
  
      def format(self, match):
          return match[:-1]
  
  
  class MagicMethodCompletion(BaseCompletionType):
  
      def matches(self, cursor_offset, line, **kwargs):
          if 'current_block' not in kwargs:
              return None
          current_block = kwargs['current_block']
  
          r = self.locate(cursor_offset, line)
          if r is None:
              return None
          if 'class' not in current_block:
              return None
          return set(name for name in MAGIC_METHODS if name.startswith(r.word))
  
      def locate(self, current_offset, line):
          return lineparts.current_method_definition_name(current_offset, line)
  
  
  class GlobalCompletion(BaseCompletionType):
  
      def matches(self, cursor_offset, line, **kwargs):
          """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.
          """
          if 'locals_' not in kwargs:
              return None
          locals_ = kwargs['locals_']
  
          r = self.locate(cursor_offset, line)
          if r is None:
              return None
  
          matches = set()
          n = len(r.word)
          for word in KEYWORDS:
              if self.method_match(word, n, r.word):
                  matches.add(word)
          for nspace in (builtins.__dict__, locals_):
              for word, val in iteritems(nspace):
                  word = try_decode(word, 'ascii')
                  # if identifier isn't ascii, don't complete (syntax error)
                  if word is None:
                      continue
                  if (self.method_match(word, n, r.word) and
                          word != "__builtins__"):
                      matches.add(_callable_postfix(val, word))
          return matches if matches else None
  
      def locate(self, current_offset, line):
          return lineparts.current_single_word(current_offset, line)
  
  
  class ParameterNameCompletion(BaseCompletionType):
  
      def matches(self, cursor_offset, line, **kwargs):
          if 'argspec' not in kwargs:
              return None
          argspec = kwargs['argspec']
  
          if not argspec:
              return None
          r = self.locate(cursor_offset, line)
          if r is None:
              return None
          if argspec:
              matches = set(name + '=' for name in argspec[1][0]
                            if isinstance(name, string_types) and
                            name.startswith(r.word))
              if py3:
                  matches.update(name + '=' for name in argspec[1][4]
                                 if name.startswith(r.word))
          return matches if matches else None
  
      def locate(self, current_offset, line):
          return lineparts.current_word(current_offset, line)
  
  
  class ExpressionAttributeCompletion(AttrCompletion):
      # could replace attr completion as a more general case with some work
      def locate(self, current_offset, line):
          return lineparts.current_expression_attribute(current_offset, line)
  
      def matches(self, cursor_offset, line, **kwargs):
          if 'locals_' not in kwargs:
              return None
          locals_ = kwargs['locals_']
  
          if locals_ is None:
              locals_ = __main__.__dict__
  
          attr = self.locate(cursor_offset, line)
  
          try:
              obj = evaluate_current_expression(cursor_offset, line, locals_)
          except EvaluationError:
              return set()
          with inspection.AttrCleaner(obj):
              #          strips leading dot
              matches = [m[1:] for m in self.attr_lookup(obj, '', attr.word)]
  
          return set(m for m in matches if few_enough_underscores(attr.word, m))
  
  
  try:
      import jedi
  except ImportError:
      class MultilineJediCompletion(BaseCompletionType):
          def matches(self, cursor_offset, line, **kwargs):
              return None
  else:
      class JediCompletion(BaseCompletionType):
  
          def matches(self, cursor_offset, line, **kwargs):
              if 'history' not in kwargs:
                  return None
              history = kwargs['history']
  
              if not lineparts.current_word(cursor_offset, line):
                  return None
              history = '\n'.join(history) + '\n' + line
  
              try:
                  script = jedi.Script(history, len(history.splitlines()),
                                       cursor_offset, 'fake.py')
                  completions = script.completions()
              except (jedi.NotFoundError, IndexError, KeyError):
                  # IndexError for #483
                  # KeyError for #544
                  self._orig_start = None
                  return None
  
              if completions:
                  diff = len(completions[0].name) - len(completions[0].complete)
                  self._orig_start = cursor_offset - diff
              else:
                  self._orig_start = None
                  return None
  
              first_letter = line[self._orig_start:self._orig_start + 1]
  
              matches = [try_decode(c.name, 'ascii') for c in completions]
              if any(not m.lower().startswith(matches[0][0].lower())
                     for m in matches):
                  # Too general - giving completions starting with multiple
                  # letters
                  return None
              else:
                  # case-sensitive matches only
                  return set(m for m in matches if m.startswith(first_letter))
  
          def locate(self, cursor_offset, line):
              start = self._orig_start
              end = cursor_offset
              return LinePart(start, end, line[start:end])
  
      class MultilineJediCompletion(JediCompletion):
          def matches(self, cursor_offset, line, **kwargs):
              if 'current_block' not in kwargs or 'history' not in kwargs:
                  return None
              current_block = kwargs['current_block']
              history = kwargs['history']
  
              if '\n' in current_block:
                  assert cursor_offset <= len(line), "%r %r" % (cursor_offset,
                                                                line)
                  results = super(MultilineJediCompletion,
                                  self).matches(cursor_offset, line,
                                                history=history)
                  return results
              else:
                  return None
  
  
  def get_completer(completers, cursor_offset, line, **kwargs):
      """Returns a list of matches and an applicable completer
  
      If no matches available, returns a tuple of an empty list and None
  
      cursor_offset is the current cursor column
      line is a string of the current line
      kwargs (all optional):
          locals_ is a dictionary of the environment
          argspec is an inspect.ArgSpec instance for the current function where
              the cursor is
          current_block is the possibly multiline not-yet-evaluated block of
              code which the current line is part of
          complete_magic_methods is a bool of whether we ought to complete
              double underscore methods like __len__ in method signatures
      """
  
      for completer in completers:
          try:
              matches = completer.matches(cursor_offset, line, **kwargs)
          except Exception as e:
              # Instead of crashing the UI, log exceptions from autocompleters.
              logger = logging.getLogger(__name__)
              logger.debug(
                  'Completer {} failed with unhandled exception: {}'.format(
                      completer, e))
              continue
          if matches is not None:
              return sorted(matches), (completer if matches else None)
  
      return [], None
  
  
  def get_default_completer(mode=SIMPLE):
      return (
          DictKeyCompletion(mode=mode),
          ImportCompletion(mode=mode),
          FilenameCompletion(mode=mode),
          MagicMethodCompletion(mode=mode),
          MultilineJediCompletion(mode=mode),
          CumulativeCompleter((GlobalCompletion(mode=mode),
                               ParameterNameCompletion(mode=mode)),
                              mode=mode),
          AttrCompletion(mode=mode),
          ExpressionAttributeCompletion(mode=mode),
      )
  
  
  def get_completer_bpython(cursor_offset, line, **kwargs):
      """"""
      return get_completer(get_default_completer(),
                           cursor_offset, line, **kwargs)
  
  
  def _callable_postfix(value, word):
      """rlcompleter's _callable_postfix done right."""
      with inspection.AttrCleaner(value):
          if inspection.is_callable(value):
              word += '('
      return word
  