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# encoding: utf-8
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"""Completion for IPython.
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This module started as fork of the rlcompleter module in the Python standard
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library. The original enhancements made to rlcompleter have been sent
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upstream and were accepted as of Python 2.3,
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This module now support a wide variety of completion mechanism both available
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for normal classic Python code, as well as completer for IPython specific
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Syntax like magics.
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Experimental
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============
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Starting with IPython 6.0, this module can make use of the Jedi library to
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generate completions both using static analysis of the code, and dynamically
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inspecting multiple namespaces. The APIs attached to this new mechanism is
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unstable and will raise unless use in an :any:`provisionalcompleter` context
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manager.
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You will find that the following are experimental:
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- :any:`provisionalcompleter`
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- :any:`IPCompleter.completions`
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- :any:`Completion`
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- :any:`rectify_completions`
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.. note::
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better name for :any:`rectify_completions` ?
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We welcome any feedback on these new API, and we also encourage you to try this
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module in debug mode (start IPython with ``--Completer.debug=True``) in order
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to have extra logging information is :any:`jedi` is crashing, or if current
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IPython completer pending deprecations are returning results not yet handled
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by :any:`jedi`.
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Using Jedi for tab completion allow snippets like the following to work without
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having to execute any code:
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>>> myvar = ['hello', 42]
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... myvar[1].bi<tab>
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Tab completion will be able to infer that ``myvar[1]`` is a real number without
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executing any code unlike the previously available ``IPCompleter.greedy``
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option.
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Be sure to update :any:`jedi` to the latest stable version or to try the
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current development version to get better completions.
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"""
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# skip module docstests
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skip_doctest = True
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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#
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# Some of this code originated from rlcompleter in the Python standard library
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# Copyright (C) 2001 Python Software Foundation, www.python.org
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import __main__
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import builtins as builtin_mod
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import glob
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import inspect
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import itertools
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import keyword
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import os
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import re
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import sys
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import unicodedata
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import string
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import warnings
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from contextlib import contextmanager
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from importlib import import_module
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from typing import Iterator, List
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from types import SimpleNamespace
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from traitlets.config.configurable import Configurable
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from IPython.core.error import TryNext
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from IPython.core.inputsplitter import ESC_MAGIC
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from IPython.core.latex_symbols import latex_symbols, reverse_latex_symbol
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from IPython.utils import generics
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from IPython.utils.dir2 import dir2, get_real_method
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from IPython.utils.process import arg_split
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from IPython.utils.py3compat import cast_unicode_py2
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from traitlets import Bool, Enum, observe
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try:
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import jedi
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import jedi.api.helpers
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JEDI_INSTALLED = True
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except ImportError:
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JEDI_INSTALLED = False
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#-----------------------------------------------------------------------------
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# Globals
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#-----------------------------------------------------------------------------
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# Public API
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__all__ = ['Completer','IPCompleter']
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if sys.platform == 'win32':
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PROTECTABLES = ' '
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else:
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PROTECTABLES = ' ()[]{}?=\\|;:\'#*"^&'
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_deprecation_readline_sentinel = object()
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class ProvisionalCompleterWarning(FutureWarning):
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"""
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Exception raise by an experimental feature in this module.
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Wrap code in :any:`provisionalcompleter` context manager if you
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are certain you want to use an unstable feature.
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"""
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pass
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warnings.filterwarnings('error', category=ProvisionalCompleterWarning)
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@contextmanager
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def provisionalcompleter(action='ignore'):
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"""
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This contest manager has to be used in any place where unstable completer
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behavior and API may be called.
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>>> with provisionalcompleter():
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... completer.do_experimetal_things() # works
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>>> completer.do_experimental_things() # raises.
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.. note:: Unstable
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By using this context manager you agree that the API in use may change
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without warning, and that you won't complain if they do so.
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You also understand that if the API is not to you liking you should report
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a bug to explain your use case upstream and improve the API and will loose
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credibility if you complain after the API is make stable.
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We'll be happy to get your feedback , feature request and improvement on
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any of the unstable APIs !
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"""
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with warnings.catch_warnings():
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warnings.filterwarnings(action, category=ProvisionalCompleterWarning)
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yield
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def has_open_quotes(s):
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"""Return whether a string has open quotes.
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This simply counts whether the number of quote characters of either type in
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the string is odd.
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Returns
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-------
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If there is an open quote, the quote character is returned. Else, return
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False.
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"""
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# We check " first, then ', so complex cases with nested quotes will get
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# the " to take precedence.
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if s.count('"') % 2:
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return '"'
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elif s.count("'") % 2:
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return "'"
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else:
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return False
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def protect_filename(s):
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"""Escape a string to protect certain characters."""
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if set(s) & set(PROTECTABLES):
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if sys.platform == "win32":
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return '"' + s + '"'
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else:
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return "".join(("\\" + c if c in PROTECTABLES else c) for c in s)
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else:
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return s
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def expand_user(path):
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"""Expand ``~``-style usernames in strings.
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This is similar to :func:`os.path.expanduser`, but it computes and returns
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extra information that will be useful if the input was being used in
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computing completions, and you wish to return the completions with the
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original '~' instead of its expanded value.
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Parameters
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----------
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path : str
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String to be expanded. If no ~ is present, the output is the same as the
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input.
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Returns
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-------
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newpath : str
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Result of ~ expansion in the input path.
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tilde_expand : bool
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Whether any expansion was performed or not.
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tilde_val : str
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The value that ~ was replaced with.
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"""
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# Default values
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tilde_expand = False
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tilde_val = ''
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newpath = path
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if path.startswith('~'):
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tilde_expand = True
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rest = len(path)-1
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newpath = os.path.expanduser(path)
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if rest:
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tilde_val = newpath[:-rest]
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else:
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tilde_val = newpath
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return newpath, tilde_expand, tilde_val
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def compress_user(path, tilde_expand, tilde_val):
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"""Does the opposite of expand_user, with its outputs.
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"""
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if tilde_expand:
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return path.replace(tilde_val, '~')
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else:
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return path
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def completions_sorting_key(word):
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"""key for sorting completions
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This does several things:
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- Lowercase all completions, so they are sorted alphabetically with
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upper and lower case words mingled
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- Demote any completions starting with underscores to the end
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- Insert any %magic and %%cellmagic completions in the alphabetical order
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by their name
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"""
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# Case insensitive sort
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word = word.lower()
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prio1, prio2 = 0, 0
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if word.startswith('__'):
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prio1 = 2
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elif word.startswith('_'):
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prio1 = 1
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if word.endswith('='):
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prio1 = -1
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if word.startswith('%%'):
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# If there's another % in there, this is something else, so leave it alone
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if not "%" in word[2:]:
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word = word[2:]
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prio2 = 2
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elif word.startswith('%'):
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if not "%" in word[1:]:
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word = word[1:]
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prio2 = 1
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return prio1, word, prio2
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class _FakeJediCompletion:
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"""
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This is a workaround to communicate to the UI that Jedi has crashed and to
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report a bug. Will be used only id :any:`IPCompleter.debug` is set to true.
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Added in IPython 6.0 so should likely be removed for 7.0
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"""
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def __init__(self, name):
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self.name = name
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self.complete = name
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self.type = 'crashed'
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self.name_with_symbols = name
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def __repr__(self):
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return '<Fake completion object jedi has crashed>'
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class Completion:
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"""
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Completion object used and return by IPython completers.
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.. warning:: Unstable
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This function is unstable, API may change without warning.
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It will also raise unless use in proper context manager.
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This act as a middle ground :any:`Completion` object between the
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:any:`jedi.api.classes.Completion` object and the Prompt Toolkit completion
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object. While Jedi need a lot of information about evaluator and how the
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code should be ran/inspected, PromptToolkit (and other frontend) mostly
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need user facing information.
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- Which range should be replaced replaced by what.
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- Some metadata (like completion type), or meta informations to displayed to
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the use user.
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For debugging purpose we can also store the origin of the completion (``jedi``,
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``IPython.python_matches``, ``IPython.magics_matches``...).
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"""
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def __init__(self, start: int, end: int, text: str, *, type: str=None, _origin=''):
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warnings.warn("``Completion`` is a provisional API (as of IPython 6.0). "
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"It may change without warnings. "
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"Use in corresponding context manager.",
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category=ProvisionalCompleterWarning, stacklevel=2)
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self.start = start
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self.end = end
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self.text = text
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self.type = type
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self._origin = _origin
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def __repr__(self):
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return '<Completion start=%s end=%s text=%r type=%r>' % (self.start, self.end, self.text, self.type or '?')
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def __eq__(self, other)->Bool:
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"""
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Equality and hash do not hash the type (as some completer may not be
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able to infer the type), but are use to (partially) de-duplicate
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completion.
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Completely de-duplicating completion is a bit tricker that just
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comparing as it depends on surrounding text, which Completions are not
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aware of.
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"""
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return self.start == other.start and \
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self.end == other.end and \
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self.text == other.text
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def __hash__(self):
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return hash((self.start, self.end, self.text))
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_IC = Iterator[Completion]
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def rectify_completions(text:str, completion:_IC, *, _debug=False)->_IC:
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"""
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Rectify a set of completion to all have the same ``start`` and ``end``
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.. warning:: Unstable
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This function is unstable, API may change without warning.
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It will also raise unless use in proper context manager.
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Parameters
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----------
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text: str
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text that should be completed.
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completion: Iterator[Completion]
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iterator over the completions to rectify
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:any:`jedi.api.classes.Completion` s returned by Jedi may not have the same start and end, though
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the Jupyter Protocol requires them to behave like so. This will readjust
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the completion to have the same ``start`` and ``end` by padding both
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extremities with surrounding text.
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During stabilisation should support a ``_debug`` option to log which
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completion are return by the IPython completer and not found in Jedi in
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order to make upstream bug report.
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"""
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warnings.warn("`rectify_completions` is a provisional API (as of IPython 6.0). "
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"It may change without warnings. "
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"Use in corresponding context manager.",
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category=ProvisionalCompleterWarning, stacklevel=2)
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completions = list(completion)
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if not completions:
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return
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starts = (c.start for c in completions)
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ends = (c.end for c in completions)
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new_start = min(starts)
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new_end = max(ends)
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seen_jedi = set()
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seen_python_matches = set()
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for c in completions:
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new_text = text[new_start:c.start] + c.text + text[c.end:new_end]
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if c._origin == 'jedi':
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seen_jedi.add(new_text)
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elif c._origin == 'IPCompleter.python_matches':
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seen_python_matches.add(new_text)
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yield Completion(new_start, new_end, new_text, type=c.type, _origin=c._origin)
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diff = seen_python_matches.difference(seen_jedi)
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if diff and _debug:
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print('IPython.python matches have extras:', diff)
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if sys.platform == 'win32':
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DELIMS = ' \t\n`!@#$^&*()=+[{]}|;\'",<>?'
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else:
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DELIMS = ' \t\n`!@#$^&*()=+[{]}\\|;:\'",<>?'
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GREEDY_DELIMS = ' =\r\n'
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class CompletionSplitter(object):
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"""An object to split an input line in a manner similar to readline.
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By having our own implementation, we can expose readline-like completion in
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a uniform manner to all frontends. This object only needs to be given the
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line of text to be split and the cursor position on said line, and it
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returns the 'word' to be completed on at the cursor after splitting the
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entire line.
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What characters are used as splitting delimiters can be controlled by
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setting the ``delims`` attribute (this is a property that internally
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automatically builds the necessary regular expression)"""
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# Private interface
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# A string of delimiter characters. The default value makes sense for
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# IPython's most typical usage patterns.
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_delims = DELIMS
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# The expression (a normal string) to be compiled into a regular expression
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# for actual splitting. We store it as an attribute mostly for ease of
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# debugging, since this type of code can be so tricky to debug.
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_delim_expr = None
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# The regular expression that does the actual splitting
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_delim_re = None
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def __init__(self, delims=None):
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delims = CompletionSplitter._delims if delims is None else delims
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self.delims = delims
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@property
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def delims(self):
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"""Return the string of delimiter characters."""
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return self._delims
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@delims.setter
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def delims(self, delims):
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"""Set the delimiters for line splitting."""
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expr = '[' + ''.join('\\'+ c for c in delims) + ']'
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self._delim_re = re.compile(expr)
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self._delims = delims
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self._delim_expr = expr
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def split_line(self, line, cursor_pos=None):
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"""Split a line of text with a cursor at the given position.
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"""
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l = line if cursor_pos is None else line[:cursor_pos]
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return self._delim_re.split(l)[-1]
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class Completer(Configurable):
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|
|
greedy = Bool(False,
|
|
|
help="""Activate greedy completion
|
|
|
PENDING DEPRECTION. this is now mostly taken care of with Jedi.
|
|
|
|
|
|
This will enable completion on elements of lists, results of function calls, etc.,
|
|
|
but can be unsafe because the code is actually evaluated on TAB.
|
|
|
"""
|
|
|
).tag(config=True)
|
|
|
|
|
|
use_jedi = Bool(default_value=JEDI_INSTALLED,
|
|
|
help="Experimental: Use Jedi to generate autocompletions. "
|
|
|
"Default to True if jedi is installed").tag(config=True)
|
|
|
|
|
|
debug = Bool(default_value=False,
|
|
|
help='Enable debug for the Completer. Mostly print extra '
|
|
|
'information for experimental jedi integration.')\
|
|
|
.tag(config=True)
|
|
|
|
|
|
|
|
|
def __init__(self, namespace=None, global_namespace=None, **kwargs):
|
|
|
"""Create a new completer for the command line.
|
|
|
|
|
|
Completer(namespace=ns, global_namespace=ns2) -> completer instance.
|
|
|
|
|
|
If unspecified, the default namespace where completions are performed
|
|
|
is __main__ (technically, __main__.__dict__). Namespaces should be
|
|
|
given as dictionaries.
|
|
|
|
|
|
An optional second namespace can be given. This allows the completer
|
|
|
to handle cases where both the local and global scopes need to be
|
|
|
distinguished.
|
|
|
"""
|
|
|
|
|
|
# Don't bind to namespace quite yet, but flag whether the user wants a
|
|
|
# specific namespace or to use __main__.__dict__. This will allow us
|
|
|
# to bind to __main__.__dict__ at completion time, not now.
|
|
|
if namespace is None:
|
|
|
self.use_main_ns = True
|
|
|
else:
|
|
|
self.use_main_ns = False
|
|
|
self.namespace = namespace
|
|
|
|
|
|
# The global namespace, if given, can be bound directly
|
|
|
if global_namespace is None:
|
|
|
self.global_namespace = {}
|
|
|
else:
|
|
|
self.global_namespace = global_namespace
|
|
|
|
|
|
super(Completer, self).__init__(**kwargs)
|
|
|
|
|
|
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__
|
|
|
|
|
|
if state == 0:
|
|
|
if "." in text:
|
|
|
self.matches = self.attr_matches(text)
|
|
|
else:
|
|
|
self.matches = self.global_matches(text)
|
|
|
try:
|
|
|
return self.matches[state]
|
|
|
except IndexError:
|
|
|
return None
|
|
|
|
|
|
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 or self.global_namespace that match.
|
|
|
|
|
|
"""
|
|
|
matches = []
|
|
|
match_append = matches.append
|
|
|
n = len(text)
|
|
|
for lst in [keyword.kwlist,
|
|
|
builtin_mod.__dict__.keys(),
|
|
|
self.namespace.keys(),
|
|
|
self.global_namespace.keys()]:
|
|
|
for word in lst:
|
|
|
if word[:n] == text and word != "__builtins__":
|
|
|
match_append(word)
|
|
|
return [cast_unicode_py2(m) for m in matches]
|
|
|
|
|
|
def attr_matches(self, text):
|
|
|
"""Compute matches when text contains a dot.
|
|
|
|
|
|
Assuming the text is of the form NAME.NAME....[NAME], and is
|
|
|
evaluatable in self.namespace or self.global_namespace, it will be
|
|
|
evaluated and its attributes (as revealed by dir()) are used as
|
|
|
possible completions. (For class instances, class members are are
|
|
|
also considered.)
|
|
|
|
|
|
WARNING: this can still invoke arbitrary C code, if an object
|
|
|
with a __getattr__ hook is evaluated.
|
|
|
|
|
|
"""
|
|
|
|
|
|
# Another option, seems to work great. Catches things like ''.<tab>
|
|
|
m = re.match(r"(\S+(\.\w+)*)\.(\w*)$", text)
|
|
|
|
|
|
if m:
|
|
|
expr, attr = m.group(1, 3)
|
|
|
elif self.greedy:
|
|
|
m2 = re.match(r"(.+)\.(\w*)$", self.line_buffer)
|
|
|
if not m2:
|
|
|
return []
|
|
|
expr, attr = m2.group(1,2)
|
|
|
else:
|
|
|
return []
|
|
|
|
|
|
try:
|
|
|
obj = eval(expr, self.namespace)
|
|
|
except:
|
|
|
try:
|
|
|
obj = eval(expr, self.global_namespace)
|
|
|
except:
|
|
|
return []
|
|
|
|
|
|
if self.limit_to__all__ and hasattr(obj, '__all__'):
|
|
|
words = get__all__entries(obj)
|
|
|
else:
|
|
|
words = dir2(obj)
|
|
|
|
|
|
try:
|
|
|
words = generics.complete_object(obj, words)
|
|
|
except TryNext:
|
|
|
pass
|
|
|
except AssertionError:
|
|
|
raise
|
|
|
except Exception:
|
|
|
# Silence errors from completion function
|
|
|
#raise # dbg
|
|
|
pass
|
|
|
# Build match list to return
|
|
|
n = len(attr)
|
|
|
return [u"%s.%s" % (expr, w) for w in words if w[:n] == attr ]
|
|
|
|
|
|
|
|
|
def get__all__entries(obj):
|
|
|
"""returns the strings in the __all__ attribute"""
|
|
|
try:
|
|
|
words = getattr(obj, '__all__')
|
|
|
except:
|
|
|
return []
|
|
|
|
|
|
return [cast_unicode_py2(w) for w in words if isinstance(w, str)]
|
|
|
|
|
|
|
|
|
def match_dict_keys(keys, prefix, delims):
|
|
|
"""Used by dict_key_matches, matching the prefix to a list of keys"""
|
|
|
if not prefix:
|
|
|
return None, 0, [repr(k) for k in keys
|
|
|
if isinstance(k, (str, bytes))]
|
|
|
quote_match = re.search('["\']', prefix)
|
|
|
quote = quote_match.group()
|
|
|
try:
|
|
|
prefix_str = eval(prefix + quote, {})
|
|
|
except Exception:
|
|
|
return None, 0, []
|
|
|
|
|
|
pattern = '[^' + ''.join('\\' + c for c in delims) + ']*$'
|
|
|
token_match = re.search(pattern, prefix, re.UNICODE)
|
|
|
token_start = token_match.start()
|
|
|
token_prefix = token_match.group()
|
|
|
|
|
|
# TODO: support bytes in Py3k
|
|
|
matched = []
|
|
|
for key in keys:
|
|
|
try:
|
|
|
if not key.startswith(prefix_str):
|
|
|
continue
|
|
|
except (AttributeError, TypeError, UnicodeError):
|
|
|
# Python 3+ TypeError on b'a'.startswith('a') or vice-versa
|
|
|
continue
|
|
|
|
|
|
# reformat remainder of key to begin with prefix
|
|
|
rem = key[len(prefix_str):]
|
|
|
# force repr wrapped in '
|
|
|
rem_repr = repr(rem + '"')
|
|
|
if rem_repr.startswith('u') and prefix[0] not in 'uU':
|
|
|
# Found key is unicode, but prefix is Py2 string.
|
|
|
# Therefore attempt to interpret key as string.
|
|
|
try:
|
|
|
rem_repr = repr(rem.encode('ascii') + '"')
|
|
|
except UnicodeEncodeError:
|
|
|
continue
|
|
|
|
|
|
rem_repr = rem_repr[1 + rem_repr.index("'"):-2]
|
|
|
if quote == '"':
|
|
|
# The entered prefix is quoted with ",
|
|
|
# but the match is quoted with '.
|
|
|
# A contained " hence needs escaping for comparison:
|
|
|
rem_repr = rem_repr.replace('"', '\\"')
|
|
|
|
|
|
# then reinsert prefix from start of token
|
|
|
matched.append('%s%s' % (token_prefix, rem_repr))
|
|
|
return quote, token_start, matched
|
|
|
|
|
|
|
|
|
def cursor_to_position(text:int, line:int, column:int)->int:
|
|
|
"""
|
|
|
|
|
|
Convert the (line,column) position of the cursor in text to an offset in a
|
|
|
string.
|
|
|
|
|
|
Parameter
|
|
|
---------
|
|
|
|
|
|
text : str
|
|
|
The text in which to calculate the cursor offset
|
|
|
line : int
|
|
|
Line of the cursor; 0-indexed
|
|
|
column : int
|
|
|
Column of the cursor 0-indexed
|
|
|
|
|
|
Return
|
|
|
------
|
|
|
Position of the cursor in ``text``, 0-indexed.
|
|
|
|
|
|
See Also
|
|
|
--------
|
|
|
position_to_cursor: reciprocal of this function
|
|
|
|
|
|
"""
|
|
|
lines = text.split('\n')
|
|
|
assert line <= len(lines), '{} <= {}'.format(str(line), str(len(lines)))
|
|
|
|
|
|
return sum(len(l) + 1 for l in lines[:line]) + column
|
|
|
|
|
|
def position_to_cursor(text:str, offset:int)->(int, int):
|
|
|
"""
|
|
|
Convert the position of the cursor in text (0 indexed) to a line
|
|
|
number(0-indexed) and a column number (0-indexed) pair
|
|
|
|
|
|
Position should be a valid position in ``text``.
|
|
|
|
|
|
Parameter
|
|
|
---------
|
|
|
|
|
|
text : str
|
|
|
The text in which to calculate the cursor offset
|
|
|
offset : int
|
|
|
Position of the cursor in ``text``, 0-indexed.
|
|
|
|
|
|
Return
|
|
|
------
|
|
|
(line, column) : (int, int)
|
|
|
Line of the cursor; 0-indexed, column of the cursor 0-indexed
|
|
|
|
|
|
|
|
|
See Also
|
|
|
--------
|
|
|
cursor_to_position : reciprocal of this function
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
|
assert 0 < offset <= len(text) , "0 < %s <= %s" % (offset , len(text))
|
|
|
|
|
|
before = text[:offset]
|
|
|
blines = before.split('\n') # ! splitnes trim trailing \n
|
|
|
line = before.count('\n')
|
|
|
col = len(blines[-1])
|
|
|
return line, col
|
|
|
|
|
|
|
|
|
def _safe_isinstance(obj, module, class_name):
|
|
|
"""Checks if obj is an instance of module.class_name if loaded
|
|
|
"""
|
|
|
return (module in sys.modules and
|
|
|
isinstance(obj, getattr(import_module(module), class_name)))
|
|
|
|
|
|
|
|
|
def back_unicode_name_matches(text):
|
|
|
u"""Match unicode characters back to unicode name
|
|
|
|
|
|
This does ``☃`` -> ``\\snowman``
|
|
|
|
|
|
Note that snowman is not a valid python3 combining character but will be expanded.
|
|
|
Though it will not recombine back to the snowman character by the completion machinery.
|
|
|
|
|
|
This will not either back-complete standard sequences like \\n, \\b ...
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
if len(text)<2:
|
|
|
return u'', ()
|
|
|
maybe_slash = text[-2]
|
|
|
if maybe_slash != '\\':
|
|
|
return u'', ()
|
|
|
|
|
|
char = text[-1]
|
|
|
# no expand on quote for completion in strings.
|
|
|
# nor backcomplete standard ascii keys
|
|
|
if char in string.ascii_letters or char in ['"',"'"]:
|
|
|
return u'', ()
|
|
|
try :
|
|
|
unic = unicodedata.name(char)
|
|
|
return '\\'+char,['\\'+unic]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
return u'', ()
|
|
|
|
|
|
def back_latex_name_matches(text:str):
|
|
|
"""Match latex characters back to unicode name
|
|
|
|
|
|
This does ``\\ℵ`` -> ``\\aleph``
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
if len(text)<2:
|
|
|
return u'', ()
|
|
|
maybe_slash = text[-2]
|
|
|
if maybe_slash != '\\':
|
|
|
return u'', ()
|
|
|
|
|
|
|
|
|
char = text[-1]
|
|
|
# no expand on quote for completion in strings.
|
|
|
# nor backcomplete standard ascii keys
|
|
|
if char in string.ascii_letters or char in ['"',"'"]:
|
|
|
return u'', ()
|
|
|
try :
|
|
|
latex = reverse_latex_symbol[char]
|
|
|
# '\\' replace the \ as well
|
|
|
return '\\'+char,[latex]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
return u'', ()
|
|
|
|
|
|
|
|
|
class IPCompleter(Completer):
|
|
|
"""Extension of the completer class with IPython-specific features"""
|
|
|
|
|
|
@observe('greedy')
|
|
|
def _greedy_changed(self, change):
|
|
|
"""update the splitter and readline delims when greedy is changed"""
|
|
|
if change['new']:
|
|
|
self.splitter.delims = GREEDY_DELIMS
|
|
|
else:
|
|
|
self.splitter.delims = DELIMS
|
|
|
|
|
|
merge_completions = Bool(True,
|
|
|
help="""Whether to merge completion results into a single list
|
|
|
|
|
|
If False, only the completion results from the first non-empty
|
|
|
completer will be returned.
|
|
|
"""
|
|
|
).tag(config=True)
|
|
|
omit__names = Enum((0,1,2), default_value=2,
|
|
|
help="""Instruct the completer to omit private method names
|
|
|
|
|
|
Specifically, when completing on ``object.<tab>``.
|
|
|
|
|
|
When 2 [default]: all names that start with '_' will be excluded.
|
|
|
|
|
|
When 1: all 'magic' names (``__foo__``) will be excluded.
|
|
|
|
|
|
When 0: nothing will be excluded.
|
|
|
"""
|
|
|
).tag(config=True)
|
|
|
limit_to__all__ = Bool(False,
|
|
|
help="""
|
|
|
DEPRECATED as of version 5.0.
|
|
|
|
|
|
Instruct the completer to use __all__ for the completion
|
|
|
|
|
|
Specifically, when completing on ``object.<tab>``.
|
|
|
|
|
|
When True: only those names in obj.__all__ will be included.
|
|
|
|
|
|
When False [default]: the __all__ attribute is ignored
|
|
|
""",
|
|
|
).tag(config=True)
|
|
|
|
|
|
@observe('limit_to__all__')
|
|
|
def _limit_to_all_changed(self, change):
|
|
|
warnings.warn('`IPython.core.IPCompleter.limit_to__all__` configuration '
|
|
|
'value has been deprecated since IPython 5.0, will be made to have '
|
|
|
'no effects and then removed in future version of IPython.',
|
|
|
UserWarning)
|
|
|
|
|
|
def __init__(self, shell=None, namespace=None, global_namespace=None,
|
|
|
use_readline=_deprecation_readline_sentinel, config=None, **kwargs):
|
|
|
"""IPCompleter() -> completer
|
|
|
|
|
|
Return a completer object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
shell
|
|
|
a pointer to the ipython shell itself. This is needed
|
|
|
because this completer knows about magic functions, and those can
|
|
|
only be accessed via the ipython instance.
|
|
|
|
|
|
namespace : dict, optional
|
|
|
an optional dict where completions are performed.
|
|
|
|
|
|
global_namespace : dict, optional
|
|
|
secondary optional dict for completions, to
|
|
|
handle cases (such as IPython embedded inside functions) where
|
|
|
both Python scopes are visible.
|
|
|
|
|
|
use_readline : bool, optional
|
|
|
DEPRECATED, ignored since IPython 6.0, will have no effects
|
|
|
"""
|
|
|
|
|
|
self.magic_escape = ESC_MAGIC
|
|
|
self.splitter = CompletionSplitter()
|
|
|
|
|
|
if use_readline is not _deprecation_readline_sentinel:
|
|
|
warnings.warn('The `use_readline` parameter is deprecated and ignored since IPython 6.0.',
|
|
|
DeprecationWarning, stacklevel=2)
|
|
|
|
|
|
# _greedy_changed() depends on splitter and readline being defined:
|
|
|
Completer.__init__(self, namespace=namespace, global_namespace=global_namespace,
|
|
|
config=config, **kwargs)
|
|
|
|
|
|
# List where completion matches will be stored
|
|
|
self.matches = []
|
|
|
self.shell = shell
|
|
|
# Regexp to split filenames with spaces in them
|
|
|
self.space_name_re = re.compile(r'([^\\] )')
|
|
|
# Hold a local ref. to glob.glob for speed
|
|
|
self.glob = glob.glob
|
|
|
|
|
|
# Determine if we are running on 'dumb' terminals, like (X)Emacs
|
|
|
# buffers, to avoid completion problems.
|
|
|
term = os.environ.get('TERM','xterm')
|
|
|
self.dumb_terminal = term in ['dumb','emacs']
|
|
|
|
|
|
# Special handling of backslashes needed in win32 platforms
|
|
|
if sys.platform == "win32":
|
|
|
self.clean_glob = self._clean_glob_win32
|
|
|
else:
|
|
|
self.clean_glob = self._clean_glob
|
|
|
|
|
|
#regexp to parse docstring for function signature
|
|
|
self.docstring_sig_re = re.compile(r'^[\w|\s.]+\(([^)]*)\).*')
|
|
|
self.docstring_kwd_re = re.compile(r'[\s|\[]*(\w+)(?:\s*=\s*.*)')
|
|
|
#use this if positional argument name is also needed
|
|
|
#= re.compile(r'[\s|\[]*(\w+)(?:\s*=?\s*.*)')
|
|
|
|
|
|
# All active matcher routines for completion
|
|
|
self.matchers = [
|
|
|
self.python_matches,
|
|
|
self.file_matches,
|
|
|
self.magic_matches,
|
|
|
self.python_func_kw_matches,
|
|
|
self.dict_key_matches,
|
|
|
]
|
|
|
|
|
|
# This is set externally by InteractiveShell
|
|
|
self.custom_completers = None
|
|
|
|
|
|
def all_completions(self, text):
|
|
|
"""
|
|
|
Wrapper around the complete method for the benefit of emacs.
|
|
|
"""
|
|
|
return self.complete(text)[1]
|
|
|
|
|
|
def _clean_glob(self, text):
|
|
|
return self.glob("%s*" % text)
|
|
|
|
|
|
def _clean_glob_win32(self,text):
|
|
|
return [f.replace("\\","/")
|
|
|
for f in self.glob("%s*" % text)]
|
|
|
|
|
|
def file_matches(self, text):
|
|
|
"""Match filenames, expanding ~USER type strings.
|
|
|
|
|
|
Most of the seemingly convoluted logic in this completer is an
|
|
|
attempt to handle filenames with spaces in them. And yet it's not
|
|
|
quite perfect, because Python's readline doesn't expose all of the
|
|
|
GNU readline details needed for this to be done correctly.
|
|
|
|
|
|
For a filename with a space in it, the printed completions will be
|
|
|
only the parts after what's already been typed (instead of the
|
|
|
full completions, as is normally done). I don't think with the
|
|
|
current (as of Python 2.3) Python readline it's possible to do
|
|
|
better."""
|
|
|
|
|
|
# chars that require escaping with backslash - i.e. chars
|
|
|
# that readline treats incorrectly as delimiters, but we
|
|
|
# don't want to treat as delimiters in filename matching
|
|
|
# when escaped with backslash
|
|
|
if text.startswith('!'):
|
|
|
text = text[1:]
|
|
|
text_prefix = u'!'
|
|
|
else:
|
|
|
text_prefix = u''
|
|
|
|
|
|
text_until_cursor = self.text_until_cursor
|
|
|
# track strings with open quotes
|
|
|
open_quotes = has_open_quotes(text_until_cursor)
|
|
|
|
|
|
if '(' in text_until_cursor or '[' in text_until_cursor:
|
|
|
lsplit = text
|
|
|
else:
|
|
|
try:
|
|
|
# arg_split ~ shlex.split, but with unicode bugs fixed by us
|
|
|
lsplit = arg_split(text_until_cursor)[-1]
|
|
|
except ValueError:
|
|
|
# typically an unmatched ", or backslash without escaped char.
|
|
|
if open_quotes:
|
|
|
lsplit = text_until_cursor.split(open_quotes)[-1]
|
|
|
else:
|
|
|
return []
|
|
|
except IndexError:
|
|
|
# tab pressed on empty line
|
|
|
lsplit = ""
|
|
|
|
|
|
if not open_quotes and lsplit != protect_filename(lsplit):
|
|
|
# if protectables are found, do matching on the whole escaped name
|
|
|
has_protectables = True
|
|
|
text0,text = text,lsplit
|
|
|
else:
|
|
|
has_protectables = False
|
|
|
text = os.path.expanduser(text)
|
|
|
|
|
|
if text == "":
|
|
|
return [text_prefix + cast_unicode_py2(protect_filename(f)) for f in self.glob("*")]
|
|
|
|
|
|
# Compute the matches from the filesystem
|
|
|
if sys.platform == 'win32':
|
|
|
m0 = self.clean_glob(text)
|
|
|
else:
|
|
|
m0 = self.clean_glob(text.replace('\\', ''))
|
|
|
|
|
|
if has_protectables:
|
|
|
# If we had protectables, we need to revert our changes to the
|
|
|
# beginning of filename so that we don't double-write the part
|
|
|
# of the filename we have so far
|
|
|
len_lsplit = len(lsplit)
|
|
|
matches = [text_prefix + text0 +
|
|
|
protect_filename(f[len_lsplit:]) for f in m0]
|
|
|
else:
|
|
|
if open_quotes:
|
|
|
# if we have a string with an open quote, we don't need to
|
|
|
# protect the names at all (and we _shouldn't_, as it
|
|
|
# would cause bugs when the filesystem call is made).
|
|
|
matches = m0
|
|
|
else:
|
|
|
matches = [text_prefix +
|
|
|
protect_filename(f) for f in m0]
|
|
|
|
|
|
# Mark directories in input list by appending '/' to their names.
|
|
|
return [cast_unicode_py2(x+'/') if os.path.isdir(x) else x for x in matches]
|
|
|
|
|
|
def magic_matches(self, text):
|
|
|
"""Match magics"""
|
|
|
# Get all shell magics now rather than statically, so magics loaded at
|
|
|
# runtime show up too.
|
|
|
lsm = self.shell.magics_manager.lsmagic()
|
|
|
line_magics = lsm['line']
|
|
|
cell_magics = lsm['cell']
|
|
|
pre = self.magic_escape
|
|
|
pre2 = pre+pre
|
|
|
|
|
|
# Completion logic:
|
|
|
# - user gives %%: only do cell magics
|
|
|
# - user gives %: do both line and cell magics
|
|
|
# - no prefix: do both
|
|
|
# In other words, line magics are skipped if the user gives %% explicitly
|
|
|
bare_text = text.lstrip(pre)
|
|
|
comp = [ pre2+m for m in cell_magics if m.startswith(bare_text)]
|
|
|
if not text.startswith(pre2):
|
|
|
comp += [ pre+m for m in line_magics if m.startswith(bare_text)]
|
|
|
return [cast_unicode_py2(c) for c in comp]
|
|
|
|
|
|
def _jedi_matches(self, cursor_column:int, cursor_line:int, text:str):
|
|
|
"""
|
|
|
|
|
|
Return a list of :any:`jedi.api.Completions` object from a ``text`` and
|
|
|
cursor position.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cursor_column : int
|
|
|
column position of the cursor in ``text``, 0-indexed.
|
|
|
cursor_line : int
|
|
|
line position of the cursor in ``text``, 0-indexed
|
|
|
text : str
|
|
|
text to complete
|
|
|
|
|
|
Debugging
|
|
|
---------
|
|
|
|
|
|
If ``IPCompleter.debug`` is ``True`` may return a :any:`_FakeJediCompletion`
|
|
|
object containing a string with the Jedi debug information attached.
|
|
|
"""
|
|
|
namespaces = [self.namespace]
|
|
|
if self.global_namespace is not None:
|
|
|
namespaces.append(self.global_namespace)
|
|
|
|
|
|
# cursor_pos is an it, jedi wants line and column
|
|
|
offset = cursor_to_position(text, cursor_line, cursor_column)
|
|
|
if offset:
|
|
|
pre = text[offset-1]
|
|
|
completion_filter = lambda x:x
|
|
|
if pre == '.':
|
|
|
if self.omit__names == 2:
|
|
|
completion_filter = lambda c:not c.name.startswith('_')
|
|
|
elif self.omit__names == 1:
|
|
|
completion_filter = lambda c:not (c.name.startswith('__') and c.name.endswith('__'))
|
|
|
elif self.omit__names == 0:
|
|
|
completion_filter = lambda x:x
|
|
|
else:
|
|
|
raise ValueError("Don't understand self.omit__names == {}".format(self.omit__names))
|
|
|
|
|
|
interpreter = jedi.Interpreter(
|
|
|
text, namespaces, column=cursor_column, line=cursor_line + 1)
|
|
|
try:
|
|
|
return filter(completion_filter, interpreter.completions())
|
|
|
except Exception as e:
|
|
|
if self.debug:
|
|
|
return [_FakeJediCompletion('Opps Jedi has crash please report a bug with the following:\n"""\n%s\ns"""' % (e))]
|
|
|
else:
|
|
|
return []
|
|
|
|
|
|
def python_matches(self, text):
|
|
|
"""Match attributes or global python names"""
|
|
|
if "." in text:
|
|
|
try:
|
|
|
matches = self.attr_matches(text)
|
|
|
if text.endswith('.') and self.omit__names:
|
|
|
if self.omit__names == 1:
|
|
|
# true if txt is _not_ a __ name, false otherwise:
|
|
|
no__name = (lambda txt:
|
|
|
re.match(r'.*\.__.*?__',txt) is None)
|
|
|
else:
|
|
|
# true if txt is _not_ a _ name, false otherwise:
|
|
|
no__name = (lambda txt:
|
|
|
re.match(r'\._.*?',txt[txt.rindex('.'):]) is None)
|
|
|
matches = filter(no__name, matches)
|
|
|
except NameError:
|
|
|
# catches <undefined attributes>.<tab>
|
|
|
matches = []
|
|
|
else:
|
|
|
matches = self.global_matches(text)
|
|
|
return matches
|
|
|
|
|
|
def _default_arguments_from_docstring(self, doc):
|
|
|
"""Parse the first line of docstring for call signature.
|
|
|
|
|
|
Docstring should be of the form 'min(iterable[, key=func])\n'.
|
|
|
It can also parse cython docstring of the form
|
|
|
'Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)'.
|
|
|
"""
|
|
|
if doc is None:
|
|
|
return []
|
|
|
|
|
|
#care only the firstline
|
|
|
line = doc.lstrip().splitlines()[0]
|
|
|
|
|
|
#p = re.compile(r'^[\w|\s.]+\(([^)]*)\).*')
|
|
|
#'min(iterable[, key=func])\n' -> 'iterable[, key=func]'
|
|
|
sig = self.docstring_sig_re.search(line)
|
|
|
if sig is None:
|
|
|
return []
|
|
|
# iterable[, key=func]' -> ['iterable[' ,' key=func]']
|
|
|
sig = sig.groups()[0].split(',')
|
|
|
ret = []
|
|
|
for s in sig:
|
|
|
#re.compile(r'[\s|\[]*(\w+)(?:\s*=\s*.*)')
|
|
|
ret += self.docstring_kwd_re.findall(s)
|
|
|
return ret
|
|
|
|
|
|
def _default_arguments(self, obj):
|
|
|
"""Return the list of default arguments of obj if it is callable,
|
|
|
or empty list otherwise."""
|
|
|
call_obj = obj
|
|
|
ret = []
|
|
|
if inspect.isbuiltin(obj):
|
|
|
pass
|
|
|
elif not (inspect.isfunction(obj) or inspect.ismethod(obj)):
|
|
|
if inspect.isclass(obj):
|
|
|
#for cython embededsignature=True the constructor docstring
|
|
|
#belongs to the object itself not __init__
|
|
|
ret += self._default_arguments_from_docstring(
|
|
|
getattr(obj, '__doc__', ''))
|
|
|
# for classes, check for __init__,__new__
|
|
|
call_obj = (getattr(obj, '__init__', None) or
|
|
|
getattr(obj, '__new__', None))
|
|
|
# for all others, check if they are __call__able
|
|
|
elif hasattr(obj, '__call__'):
|
|
|
call_obj = obj.__call__
|
|
|
ret += self._default_arguments_from_docstring(
|
|
|
getattr(call_obj, '__doc__', ''))
|
|
|
|
|
|
_keeps = (inspect.Parameter.KEYWORD_ONLY,
|
|
|
inspect.Parameter.POSITIONAL_OR_KEYWORD)
|
|
|
|
|
|
try:
|
|
|
sig = inspect.signature(call_obj)
|
|
|
ret.extend(k for k, v in sig.parameters.items() if
|
|
|
v.kind in _keeps)
|
|
|
except ValueError:
|
|
|
pass
|
|
|
|
|
|
return list(set(ret))
|
|
|
|
|
|
def python_func_kw_matches(self,text):
|
|
|
"""Match named parameters (kwargs) of the last open function"""
|
|
|
|
|
|
if "." in text: # a parameter cannot be dotted
|
|
|
return []
|
|
|
try: regexp = self.__funcParamsRegex
|
|
|
except AttributeError:
|
|
|
regexp = self.__funcParamsRegex = re.compile(r'''
|
|
|
'.*?(?<!\\)' | # single quoted strings or
|
|
|
".*?(?<!\\)" | # double quoted strings or
|
|
|
\w+ | # identifier
|
|
|
\S # other characters
|
|
|
''', re.VERBOSE | re.DOTALL)
|
|
|
# 1. find the nearest identifier that comes before an unclosed
|
|
|
# parenthesis before the cursor
|
|
|
# e.g. for "foo (1+bar(x), pa<cursor>,a=1)", the candidate is "foo"
|
|
|
tokens = regexp.findall(self.text_until_cursor)
|
|
|
iterTokens = reversed(tokens); openPar = 0
|
|
|
|
|
|
for token in iterTokens:
|
|
|
if token == ')':
|
|
|
openPar -= 1
|
|
|
elif token == '(':
|
|
|
openPar += 1
|
|
|
if openPar > 0:
|
|
|
# found the last unclosed parenthesis
|
|
|
break
|
|
|
else:
|
|
|
return []
|
|
|
# 2. Concatenate dotted names ("foo.bar" for "foo.bar(x, pa" )
|
|
|
ids = []
|
|
|
isId = re.compile(r'\w+$').match
|
|
|
|
|
|
while True:
|
|
|
try:
|
|
|
ids.append(next(iterTokens))
|
|
|
if not isId(ids[-1]):
|
|
|
ids.pop(); break
|
|
|
if not next(iterTokens) == '.':
|
|
|
break
|
|
|
except StopIteration:
|
|
|
break
|
|
|
|
|
|
# Find all named arguments already assigned to, as to avoid suggesting
|
|
|
# them again
|
|
|
usedNamedArgs = set()
|
|
|
par_level = -1
|
|
|
for token, next_token in zip(tokens, tokens[1:]):
|
|
|
if token == '(':
|
|
|
par_level += 1
|
|
|
elif token == ')':
|
|
|
par_level -= 1
|
|
|
|
|
|
if par_level != 0:
|
|
|
continue
|
|
|
|
|
|
if next_token != '=':
|
|
|
continue
|
|
|
|
|
|
usedNamedArgs.add(token)
|
|
|
|
|
|
# lookup the candidate callable matches either using global_matches
|
|
|
# or attr_matches for dotted names
|
|
|
if len(ids) == 1:
|
|
|
callableMatches = self.global_matches(ids[0])
|
|
|
else:
|
|
|
callableMatches = self.attr_matches('.'.join(ids[::-1]))
|
|
|
argMatches = []
|
|
|
for callableMatch in callableMatches:
|
|
|
try:
|
|
|
namedArgs = self._default_arguments(eval(callableMatch,
|
|
|
self.namespace))
|
|
|
except:
|
|
|
continue
|
|
|
|
|
|
# Remove used named arguments from the list, no need to show twice
|
|
|
for namedArg in set(namedArgs) - usedNamedArgs:
|
|
|
if namedArg.startswith(text):
|
|
|
argMatches.append(u"%s=" %namedArg)
|
|
|
return argMatches
|
|
|
|
|
|
def dict_key_matches(self, text):
|
|
|
"Match string keys in a dictionary, after e.g. 'foo[' "
|
|
|
def get_keys(obj):
|
|
|
# Objects can define their own completions by defining an
|
|
|
# _ipy_key_completions_() method.
|
|
|
method = get_real_method(obj, '_ipython_key_completions_')
|
|
|
if method is not None:
|
|
|
return method()
|
|
|
|
|
|
# Special case some common in-memory dict-like types
|
|
|
if isinstance(obj, dict) or\
|
|
|
_safe_isinstance(obj, 'pandas', 'DataFrame'):
|
|
|
try:
|
|
|
return list(obj.keys())
|
|
|
except Exception:
|
|
|
return []
|
|
|
elif _safe_isinstance(obj, 'numpy', 'ndarray') or\
|
|
|
_safe_isinstance(obj, 'numpy', 'void'):
|
|
|
return obj.dtype.names or []
|
|
|
return []
|
|
|
|
|
|
try:
|
|
|
regexps = self.__dict_key_regexps
|
|
|
except AttributeError:
|
|
|
dict_key_re_fmt = r'''(?x)
|
|
|
( # match dict-referring expression wrt greedy setting
|
|
|
%s
|
|
|
)
|
|
|
\[ # open bracket
|
|
|
\s* # and optional whitespace
|
|
|
([uUbB]? # string prefix (r not handled)
|
|
|
(?: # unclosed string
|
|
|
'(?:[^']|(?<!\\)\\')*
|
|
|
|
|
|
|
"(?:[^"]|(?<!\\)\\")*
|
|
|
)
|
|
|
)?
|
|
|
$
|
|
|
'''
|
|
|
regexps = self.__dict_key_regexps = {
|
|
|
False: re.compile(dict_key_re_fmt % '''
|
|
|
# identifiers separated by .
|
|
|
(?!\d)\w+
|
|
|
(?:\.(?!\d)\w+)*
|
|
|
'''),
|
|
|
True: re.compile(dict_key_re_fmt % '''
|
|
|
.+
|
|
|
''')
|
|
|
}
|
|
|
|
|
|
match = regexps[self.greedy].search(self.text_until_cursor)
|
|
|
if match is None:
|
|
|
return []
|
|
|
|
|
|
expr, prefix = match.groups()
|
|
|
try:
|
|
|
obj = eval(expr, self.namespace)
|
|
|
except Exception:
|
|
|
try:
|
|
|
obj = eval(expr, self.global_namespace)
|
|
|
except Exception:
|
|
|
return []
|
|
|
|
|
|
keys = get_keys(obj)
|
|
|
if not keys:
|
|
|
return keys
|
|
|
closing_quote, token_offset, matches = match_dict_keys(keys, prefix, self.splitter.delims)
|
|
|
if not matches:
|
|
|
return matches
|
|
|
|
|
|
# get the cursor position of
|
|
|
# - the text being completed
|
|
|
# - the start of the key text
|
|
|
# - the start of the completion
|
|
|
text_start = len(self.text_until_cursor) - len(text)
|
|
|
if prefix:
|
|
|
key_start = match.start(2)
|
|
|
completion_start = key_start + token_offset
|
|
|
else:
|
|
|
key_start = completion_start = match.end()
|
|
|
|
|
|
# grab the leading prefix, to make sure all completions start with `text`
|
|
|
if text_start > key_start:
|
|
|
leading = ''
|
|
|
else:
|
|
|
leading = text[text_start:completion_start]
|
|
|
|
|
|
# the index of the `[` character
|
|
|
bracket_idx = match.end(1)
|
|
|
|
|
|
# append closing quote and bracket as appropriate
|
|
|
# this is *not* appropriate if the opening quote or bracket is outside
|
|
|
# the text given to this method
|
|
|
suf = ''
|
|
|
continuation = self.line_buffer[len(self.text_until_cursor):]
|
|
|
if key_start > text_start and closing_quote:
|
|
|
# quotes were opened inside text, maybe close them
|
|
|
if continuation.startswith(closing_quote):
|
|
|
continuation = continuation[len(closing_quote):]
|
|
|
else:
|
|
|
suf += closing_quote
|
|
|
if bracket_idx > text_start:
|
|
|
# brackets were opened inside text, maybe close them
|
|
|
if not continuation.startswith(']'):
|
|
|
suf += ']'
|
|
|
|
|
|
return [leading + k + suf for k in matches]
|
|
|
|
|
|
def unicode_name_matches(self, text):
|
|
|
u"""Match Latex-like syntax for unicode characters base
|
|
|
on the name of the character.
|
|
|
|
|
|
This does ``\\GREEK SMALL LETTER ETA`` -> ``η``
|
|
|
|
|
|
Works only on valid python 3 identifier, or on combining characters that
|
|
|
will combine to form a valid identifier.
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
slashpos = text.rfind('\\')
|
|
|
if slashpos > -1:
|
|
|
s = text[slashpos+1:]
|
|
|
try :
|
|
|
unic = unicodedata.lookup(s)
|
|
|
# allow combining chars
|
|
|
if ('a'+unic).isidentifier():
|
|
|
return '\\'+s,[unic]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
return u'', []
|
|
|
|
|
|
|
|
|
def latex_matches(self, text):
|
|
|
u"""Match Latex syntax for unicode characters.
|
|
|
|
|
|
This does both ``\\alp`` -> ``\\alpha`` and ``\\alpha`` -> ``α``
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
slashpos = text.rfind('\\')
|
|
|
if slashpos > -1:
|
|
|
s = text[slashpos:]
|
|
|
if s in latex_symbols:
|
|
|
# Try to complete a full latex symbol to unicode
|
|
|
# \\alpha -> α
|
|
|
return s, [latex_symbols[s]]
|
|
|
else:
|
|
|
# If a user has partially typed a latex symbol, give them
|
|
|
# a full list of options \al -> [\aleph, \alpha]
|
|
|
matches = [k for k in latex_symbols if k.startswith(s)]
|
|
|
return s, matches
|
|
|
return u'', []
|
|
|
|
|
|
def dispatch_custom_completer(self, text):
|
|
|
if not self.custom_completers:
|
|
|
return
|
|
|
|
|
|
line = self.line_buffer
|
|
|
if not line.strip():
|
|
|
return None
|
|
|
|
|
|
# Create a little structure to pass all the relevant information about
|
|
|
# the current completion to any custom completer.
|
|
|
event = SimpleNamespace()
|
|
|
event.line = line
|
|
|
event.symbol = text
|
|
|
cmd = line.split(None,1)[0]
|
|
|
event.command = cmd
|
|
|
event.text_until_cursor = self.text_until_cursor
|
|
|
|
|
|
# for foo etc, try also to find completer for %foo
|
|
|
if not cmd.startswith(self.magic_escape):
|
|
|
try_magic = self.custom_completers.s_matches(
|
|
|
self.magic_escape + cmd)
|
|
|
else:
|
|
|
try_magic = []
|
|
|
|
|
|
for c in itertools.chain(self.custom_completers.s_matches(cmd),
|
|
|
try_magic,
|
|
|
self.custom_completers.flat_matches(self.text_until_cursor)):
|
|
|
try:
|
|
|
res = c(event)
|
|
|
if res:
|
|
|
# first, try case sensitive match
|
|
|
withcase = [cast_unicode_py2(r) for r in res if r.startswith(text)]
|
|
|
if withcase:
|
|
|
return withcase
|
|
|
# if none, then case insensitive ones are ok too
|
|
|
text_low = text.lower()
|
|
|
return [cast_unicode_py2(r) for r in res if r.lower().startswith(text_low)]
|
|
|
except TryNext:
|
|
|
pass
|
|
|
|
|
|
return None
|
|
|
|
|
|
def completions(self, text: str, offset: int)->Iterator[Completion]:
|
|
|
"""
|
|
|
Returns an iterator over the possible completions
|
|
|
|
|
|
.. warning:: Unstable
|
|
|
|
|
|
This function is unstable, API may change without warning.
|
|
|
It will also raise unless use in proper context manager.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
text:str
|
|
|
Full text of the current input, multi line string.
|
|
|
offset:int
|
|
|
Integer representing the position of the cursor in ``text``. Offset
|
|
|
is 0-based indexed.
|
|
|
|
|
|
Yields
|
|
|
------
|
|
|
:any:`Completion` object
|
|
|
|
|
|
|
|
|
The cursor on a text can either be seen as being "in between"
|
|
|
characters or "On" a character depending on the interface visible to
|
|
|
the user. For consistency the cursor being on "in between" characters X
|
|
|
and Y is equivalent to the cursor being "on" character Y, that is to say
|
|
|
the character the cursor is on is considered as being after the cursor.
|
|
|
|
|
|
Combining characters may span more that one position in the
|
|
|
text.
|
|
|
|
|
|
|
|
|
.. note::
|
|
|
|
|
|
If ``IPCompleter.debug`` is :any:`True` will yield a ``--jedi/ipython--``
|
|
|
fake Completion token to distinguish completion returned by Jedi
|
|
|
and usual IPython completion.
|
|
|
|
|
|
"""
|
|
|
warnings.warn("_complete is a provisional API (as of IPython 6.0). "
|
|
|
"It may change without warnings. "
|
|
|
"Use in corresponding context manager.",
|
|
|
category=ProvisionalCompleterWarning, stacklevel=2)
|
|
|
|
|
|
# Possible Improvements / Known limitation
|
|
|
##########################################
|
|
|
# Completions may be identical even if they have different ranges and
|
|
|
# text. For example:
|
|
|
# >>> a=1
|
|
|
# >>> a.<tab>
|
|
|
# May returns:
|
|
|
# - `a.real` from 0 to 2
|
|
|
# - `.real` from 1 to 2
|
|
|
# the current code does not (yet) check for such equivalence
|
|
|
seen = set()
|
|
|
for c in self._completions(text, offset):
|
|
|
if c and (c in seen):
|
|
|
continue
|
|
|
yield c
|
|
|
seen.add(c)
|
|
|
|
|
|
def _completions(self, full_text: str, offset: int)->Iterator[Completion]:
|
|
|
before = full_text[:offset]
|
|
|
cursor_line, cursor_column = position_to_cursor(full_text, offset)
|
|
|
|
|
|
matched_text, matches, matches_origin, jedi_matches = self._complete(
|
|
|
full_text=full_text, cursor_line=cursor_line, cursor_pos=cursor_column)
|
|
|
|
|
|
for jm in jedi_matches:
|
|
|
delta = len(jm.name_with_symbols) - len(jm.complete)
|
|
|
yield Completion(start=offset - delta, end=offset, text=jm.name_with_symbols, type=jm.type, _origin='jedi')
|
|
|
|
|
|
|
|
|
start_offset = before.rfind(matched_text)
|
|
|
|
|
|
# TODO:
|
|
|
# Supress this, right now just for debug.
|
|
|
if jedi_matches and matches and self.debug:
|
|
|
yield Completion(start=start_offset, end=offset, text='--jedi/ipython--', _origin='debug')
|
|
|
|
|
|
# I'm unsure if this is always true, so let's assert and see if it
|
|
|
# crash
|
|
|
assert before.endswith(matched_text)
|
|
|
for m, t in zip(matches, matches_origin):
|
|
|
yield Completion(start=start_offset, end=offset, text=m, _origin=t)
|
|
|
|
|
|
|
|
|
def complete(self, text=None, line_buffer=None, cursor_pos=None):
|
|
|
"""Find completions for the given text and line context.
|
|
|
|
|
|
Note that both the text and the line_buffer are optional, but at least
|
|
|
one of them must be given.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
text : string, optional
|
|
|
Text to perform the completion on. If not given, the line buffer
|
|
|
is split using the instance's CompletionSplitter object.
|
|
|
|
|
|
line_buffer : string, optional
|
|
|
If not given, the completer attempts to obtain the current line
|
|
|
buffer via readline. This keyword allows clients which are
|
|
|
requesting for text completions in non-readline contexts to inform
|
|
|
the completer of the entire text.
|
|
|
|
|
|
cursor_pos : int, optional
|
|
|
Index of the cursor in the full line buffer. Should be provided by
|
|
|
remote frontends where kernel has no access to frontend state.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
text : str
|
|
|
Text that was actually used in the completion.
|
|
|
|
|
|
matches : list
|
|
|
A list of completion matches.
|
|
|
|
|
|
|
|
|
.. note::
|
|
|
|
|
|
This API is likely to be deprecated and replaced by
|
|
|
:any:`IPCompleter.completions` in the future.
|
|
|
|
|
|
|
|
|
"""
|
|
|
warnings.warn('`Completer.complete` is pending deprecation since '
|
|
|
'IPython 6.0 and will be replaced by `Completer.completions`.',
|
|
|
PendingDeprecationWarning)
|
|
|
# potential todo, FOLD the 3rd throw away argument of _complete
|
|
|
# into the first 2 one.
|
|
|
return self._complete(line_buffer=line_buffer, cursor_pos=cursor_pos, text=text, cursor_line=0)[:2]
|
|
|
|
|
|
def _complete(self, *, cursor_line, cursor_pos, line_buffer=None, text=None,
|
|
|
full_text=None, return_jedi_results=True) -> (str, List[str], List[object]):
|
|
|
"""
|
|
|
|
|
|
Like complete but can also returns raw jedi completions as well as the
|
|
|
origin of the completion text. This could (and should) be made much
|
|
|
cleaner but that will be simpler once we drop the old (and stateful)
|
|
|
:any:`complete` API.
|
|
|
|
|
|
|
|
|
With current provisional API, cursor_pos act both (depending on the
|
|
|
caller) as the offset in the ``text`` or ``line_buffer``, or as the
|
|
|
``column`` when passing multiline strings this could/should be renamed
|
|
|
but would add extra noise.
|
|
|
"""
|
|
|
|
|
|
# if the cursor position isn't given, the only sane assumption we can
|
|
|
# make is that it's at the end of the line (the common case)
|
|
|
if cursor_pos is None:
|
|
|
cursor_pos = len(line_buffer) if text is None else len(text)
|
|
|
|
|
|
if self.use_main_ns:
|
|
|
self.namespace = __main__.__dict__
|
|
|
|
|
|
# if text is either None or an empty string, rely on the line buffer
|
|
|
if (not line_buffer) and full_text:
|
|
|
line_buffer = full_text.split('\n')[cursor_line]
|
|
|
if not text:
|
|
|
text = self.splitter.split_line(line_buffer, cursor_pos)
|
|
|
|
|
|
base_text = text if not line_buffer else line_buffer[:cursor_pos]
|
|
|
latex_text, latex_matches = self.latex_matches(base_text)
|
|
|
if latex_matches:
|
|
|
return latex_text, latex_matches, ['latex_matches']*len(latex_matches), ()
|
|
|
name_text = ''
|
|
|
name_matches = []
|
|
|
for meth in (self.unicode_name_matches, back_latex_name_matches, back_unicode_name_matches):
|
|
|
name_text, name_matches = meth(base_text)
|
|
|
if name_text:
|
|
|
return name_text, name_matches, [meth.__qualname__]*len(name_matches), {}
|
|
|
|
|
|
|
|
|
# If no line buffer is given, assume the input text is all there was
|
|
|
if line_buffer is None:
|
|
|
line_buffer = text
|
|
|
|
|
|
self.line_buffer = line_buffer
|
|
|
self.text_until_cursor = self.line_buffer[:cursor_pos]
|
|
|
|
|
|
# Start with a clean slate of completions
|
|
|
matches = []
|
|
|
custom_res = self.dispatch_custom_completer(text)
|
|
|
# FIXME: we should extend our api to return a dict with completions for
|
|
|
# different types of objects. The rlcomplete() method could then
|
|
|
# simply collapse the dict into a list for readline, but we'd have
|
|
|
# richer completion semantics in other evironments.
|
|
|
completions = ()
|
|
|
if self.use_jedi and return_jedi_results:
|
|
|
if not full_text:
|
|
|
full_text = line_buffer
|
|
|
completions = self._jedi_matches(
|
|
|
cursor_pos, cursor_line, full_text)
|
|
|
if custom_res is not None:
|
|
|
# did custom completers produce something?
|
|
|
matches = [(m, 'custom') for m in custom_res]
|
|
|
else:
|
|
|
# Extend the list of completions with the results of each
|
|
|
# matcher, so we return results to the user from all
|
|
|
# namespaces.
|
|
|
if self.merge_completions:
|
|
|
matches = []
|
|
|
for matcher in self.matchers:
|
|
|
try:
|
|
|
matches.extend([(m, matcher.__qualname__)
|
|
|
for m in matcher(text)])
|
|
|
except:
|
|
|
# Show the ugly traceback if the matcher causes an
|
|
|
# exception, but do NOT crash the kernel!
|
|
|
sys.excepthook(*sys.exc_info())
|
|
|
else:
|
|
|
for matcher in self.matchers:
|
|
|
matches = [(m, matcher.__qualname__)
|
|
|
for m in matcher(text)]
|
|
|
if matches:
|
|
|
break
|
|
|
seen = set()
|
|
|
filtered_matches = set()
|
|
|
for m in matches:
|
|
|
t, c = m
|
|
|
if t not in seen:
|
|
|
filtered_matches.add(m)
|
|
|
seen.add(t)
|
|
|
|
|
|
filtered_matches = sorted(
|
|
|
set(filtered_matches), key=lambda x: completions_sorting_key(x[0]))
|
|
|
|
|
|
matches = [m[0] for m in filtered_matches]
|
|
|
origins = [m[1] for m in filtered_matches]
|
|
|
|
|
|
self.matches = matches
|
|
|
|
|
|
return text, matches, origins, completions
|
|
|
|
