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# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2009 www.stani.be
# <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(r'''^import(\s|$)|from.+''')
# The following regular expression means an 'unquoted' word
RE_UNQUOTED_WORD = re.compile(
# don't start with a quote
r'''(?:^|[^"'a-zA-Z0-9_])'''
# start with a \w = [a-zA-Z0-9_]
r'''((?:\w+'''
# allow also dots and closed bracket pairs []
r'''(?:\w|[.]|\[.+?\])*'''
# allow empty string
r'''|)'''
# allow an unfinished index at the end (including quotes)
r'''(?:\[[^\]]*$)?)$''',
# allow unicode as theoretically this is possible
re.UNICODE)
def complete(line, cursor, namespace, private):
"""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)
if not private:
matches[:] = [m for m in matches if m[:1] != "_"]
matches.sort()
else:
from . import complete_namespace
matches = complete_namespace.complete(word, namespace, private=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)
prefix = os.path.commonprefix(matches)[len(word):]
no_calltip = False
else:
matches, word = complete(line, cursor, namespace, private)
prefix = os.path.commonprefix(matches)[len(word):]
if len(matches) == 1:
scrollback = ''
else:
# causes blender bug T27495 since string keys may contain '.'
# scrollback = ' '.join([m.split('.')[-1] for m in matches])
# add white space to align with the cursor
white_space = " " + (" " * (cursor + len(prefix)))
word_prefix = word + prefix
scrollback = '\n'.join(
[white_space + m[len(word_prefix):]
if (word_prefix and m.startswith(word_prefix))
else
white_space + m.split('.')[-1]
for m in matches])
no_calltip = True
if prefix:
line = line[:cursor] + prefix + line[cursor:]
cursor += len(prefix.encode('utf-8'))
if no_calltip and prefix.endswith('('):
return expand(line, cursor, namespace, private=private)
return line, cursor, scrollback
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