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# Copyright (c) 2009 www.stani.be (GPL license)
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# <pep8-80 compliant>
"""This module provides intellisense features such as:
* autocompletion
* calltips
It unifies all completion plugins and only loads them on demand.
"""
# TODO: file complete if startswith quotes
import os
import re
# regular expressions to find out which completer we need
# line which starts with an import statement
RE_MODULE = re.compile('^import(\s|$)|from.+')
# The following regular expression means an 'unquoted' word
RE_UNQUOTED_WORD = re.compile(
# don't start with a quote
'''(?:^|[^"'a-zA-Z0-9_])'''
# start with a \w = [a-zA-Z0-9_]
'''((?:\w+'''
# allow also dots and closed bracket pairs []
'''(?:\w|[.]|\[.+?\])*'''
# allow empty string
'''|)'''
# allow an unfinished index at the end (including quotes)
'''(?:\[[^\]]*$)?)$''',
# allow unicode as theoretically this is possible
re.UNICODE)
def complete(line, cursor, namespace, private=True):
"""Returns a list of possible completions:
* name completion
* attribute completion (obj.attr)
* index completion for lists and dictionaries
* module completion (from/import)
:param line: incomplete text line
:type line: str
:param cursor: current character position
:type cursor: int
:param namespace: namespace
:type namespace: dict
:param private: whether private variables should be listed
:type private: bool
:returns: list of completions, word
:rtype: list, str
>>> complete('re.sr', 5, {'re': re})
(['re.sre_compile', 're.sre_parse'], 're.sr')
"""
re_unquoted_word = RE_UNQUOTED_WORD.search(line[:cursor])
if re_unquoted_word:
# unquoted word -> module or attribute completion
word = re_unquoted_word.group(1)
if RE_MODULE.match(line):
from . import complete_import
matches = complete_import.complete(line)
else:
from . import complete_namespace
matches = complete_namespace.complete(word, namespace, private)
else:
# for now we don't have completers for strings
# TODO: add file auto completer for strings
word = ''
matches = []
return matches, word
def expand(line, cursor, namespace, private=True):
"""This method is invoked when the user asks autocompletion,
e.g. when Ctrl+Space is clicked.
:param line: incomplete text line
:type line: str
:param cursor: current character position
:type cursor: int
:param namespace: namespace
:type namespace: dict
:param private: whether private variables should be listed
:type private: bool
:returns:
current expanded line, updated cursor position and scrollback
:rtype: str, int, str
>>> expand('os.path.isdir(', 14, {'os': os})[-1]
'isdir(s)\\nReturn true if the pathname refers to an existing directory.'
>>> expand('abs(', 4, {})[-1]
'abs(number) -> number\\nReturn the absolute value of the argument.'
"""
if line[:cursor].strip().endswith('('):
from . import complete_calltip
matches, word, scrollback = complete_calltip.complete(line,
cursor, namespace)
no_calltip = False
else:
matches, word = complete(line, cursor, namespace, private)
if len(matches) == 1:
scrollback = ''
else:
scrollback = ' '.join([m.split('.')[-1] for m in matches])
no_calltip = True
prefix = os.path.commonprefix(matches)[len(word):]
if prefix:
line = line[:cursor] + prefix + line[cursor:]
cursor += len(prefix)
if no_calltip and prefix.endswith('('):
return expand(line, cursor, namespace, private)
return line, cursor, scrollback
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