forked from DonJayamanne/pythonVSCode
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcompletion.py
More file actions
315 lines (274 loc) · 11.2 KB
/
completion.py
File metadata and controls
315 lines (274 loc) · 11.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
import os
import io
import re
import sys
import json
import traceback
sys.path.append(os.path.dirname(__file__))
import jedi
# remove jedi from path after we import it so it will not be completed
sys.path.pop(0)
WORD_RE = re.compile(r'\w')
class JediCompletion(object):
basic_types = {
'module': 'import',
'instance': 'variable',
'statement': 'value',
'param': 'variable',
}
def __init__(self):
self.default_sys_path = sys.path
self._input = io.open(sys.stdin.fileno(), encoding='utf-8')
def _get_definition_type(self, definition):
is_built_in = definition.in_builtin_module
if definition.type not in ['import', 'keyword'] and is_built_in():
return 'builtin'
if definition.type in ['statement'] and definition.name.isupper():
return 'constant'
return self.basic_types.get(definition.type, definition.type)
def _additional_info(self, completion):
"""Provide additional information about the completion object."""
if completion._definition is None:
return ''
if completion.type == 'statement':
nodes_to_display = ['InstanceElement', 'String', 'Node', 'Lambda',
'Number']
return ''.join(c.get_code() for c in
completion._definition.children if type(c).__name__
in nodes_to_display).replace('\n', '')
return ''
@classmethod
def _get_top_level_module(cls, path):
"""Recursively walk through directories looking for top level module.
Jedi will use current filepath to look for another modules at same
path, but it will not be able to see modules **above**, so our goal
is to find the higher python module available from filepath.
"""
_path, _ = os.path.split(path)
if os.path.isfile(os.path.join(_path, '__init__.py')):
return cls._get_top_level_module(_path)
return path
def _generate_signature(self, completion):
"""Generate signature with function arguments.
"""
if not hasattr(completion, 'params'):
return ''
return '%s(%s)' % (
completion.name,
', '.join(param.description for param in completion.params))
def _get_call_signatures(self, script):
"""Extract call signatures from jedi.api.Script object in failsafe way.
Returns:
Tuple with original signature object, name and value.
"""
_signatures = []
try:
call_signatures = script.call_signatures()
except KeyError:
call_signatures = []
for signature in call_signatures:
for pos, param in enumerate(signature.params):
if not param.name:
continue
if param.name == 'self' and pos == 0:
continue
if WORD_RE.match(param.name) is None:
continue
try:
name, value = param.description.split('=')
except ValueError:
name = param.description
value = None
if name.startswith('*'):
continue
_signatures.append((signature, name, value))
return _signatures
def _serialize_completions(self, script, identifier=None, prefix=''):
"""Serialize response to be read from VSCode.
Args:
script: Instance of jedi.api.Script object.
identifier: Unique completion identifier to pass back to VSCode.
prefix: String with prefix to filter function arguments.
Used only when fuzzy matcher turned off.
Returns:
Serialized string to send to VSCode.
"""
_completions = []
for signature, name, value in self._get_call_signatures(script):
if not self.fuzzy_matcher and not name.lower().startswith(
prefix.lower()):
continue
_completion = {
'type': 'property',
'rightLabel': self._additional_info(signature)
}
# we pass 'text' here only for fuzzy matcher
if value:
_completion['snippet'] = '%s=${1:%s}$0' % (name, value)
_completion['text'] = '%s=%s' % (name, value)
else:
_completion['snippet'] = '%s=$1$0' % name
_completion['text'] = name
_completion['displayText'] = name
if self.show_doc_strings:
_completion['description'] = signature.docstring()
else:
_completion['description'] = self._generate_signature(
signature)
_completions.append(_completion)
try:
completions = script.completions()
except KeyError:
completions = []
for completion in completions:
if self.show_doc_strings:
description = completion.docstring()
else:
description = self._generate_signature(completion)
_completion = {
'text': completion.name,
'type': self._get_definition_type(completion),
'description': description,
'rightLabel': self._additional_info(completion)
}
if any([c['text'].split('=')[0] == _completion['text']
for c in _completions]):
# ignore function arguments we already have
continue
_completions.append(_completion)
return json.dumps({'id': identifier, 'results': _completions})
def _serialize_arguments(self, script, identifier=None):
"""Serialize response to be read from VSCode.
Args:
script: Instance of jedi.api.Script object.
identifier: Unique completion identifier to pass back to VSCode.
Returns:
Serialized string to send to VSCode.
"""
seen = set()
arguments = []
i = 1
for _, name, value in self._get_call_signatures(script):
if not value:
arg = '${%s:%s}' % (i, name)
elif self.use_snippets == 'all':
arg = '%s=${%s:%s}' % (name, i, value)
else:
continue
if name not in seen:
seen.add(name)
arguments.append(arg)
i += 1
snippet = '%s$0' % ', '.join(arguments)
return json.dumps({'id': identifier, 'results': [],
'arguments': snippet})
def _serialize_definitions(self, definitions, identifier=None):
"""Serialize response to be read from VSCode.
Args:
definitions: List of jedi.api.classes.Definition objects.
identifier: Unique completion identifier to pass back to VSCode.
Returns:
Serialized string to send to VSCode.
"""
def _top_definition(definition):
for d in definition.goto_assignments():
if d == definition:
continue
if d.type == 'import':
return _top_definition(d)
else:
return d
return definition
_definitions = []
for definition in definitions:
if definition.module_path:
if definition.type == 'import':
definition = _top_definition(definition)
_definition = {
'text': definition.name,
'type': self._get_definition_type(definition),
'fileName': definition.module_path,
'line': definition.line - 1,
'column': definition.column
}
_definitions.append(_definition)
return json.dumps({'id': identifier, 'results': _definitions})
def _serialize_usages(self, usages, identifier=None):
_usages = []
for usage in usages:
_usages.append({
'name': usage.name,
'moduleName': usage.module_name,
'fileName': usage.module_path,
'line': usage.line,
'column': usage.column,
})
return json.dumps({'id': identifier, 'results': _usages})
def _deserialize(self, request):
"""Deserialize request from VSCode.
Args:
request: String with raw request from VSCode.
Returns:
Python dictionary with request data.
"""
return json.loads(request)
def _set_request_config(self, config):
"""Sets config values for current request.
This includes sys.path modifications which is getting restored to
default value on each request so each project should be isolated
from each other.
Args:
config: Dictionary with config values.
"""
sys.path = self.default_sys_path
self.use_snippets = config.get('useSnippets')
self.show_doc_strings = config.get('showDescriptions', True)
self.fuzzy_matcher = config.get('fuzzyMatcher', False)
jedi.settings.case_insensitive_completion = config.get(
'caseInsensitiveCompletion', True)
for path in config.get('extraPaths', []):
if path and path not in sys.path:
sys.path.insert(0, path)
def _process_request(self, request):
"""Accept serialized request from VSCode and write response.
"""
request = self._deserialize(request)
self._set_request_config(request.get('config', {}))
path = self._get_top_level_module(request.get('path', ''))
if path not in sys.path:
sys.path.insert(0, path)
lookup = request.get('lookup', 'completions')
if lookup == 'names':
return self._write_response(self._serialize_definitions(
jedi.api.names(
source=request['source'],
path=request.get('path', '')),
request['id']))
script = jedi.api.Script(
source=request['source'], line=request['line'] + 1,
column=request['column'], path=request.get('path', ''))
if lookup == 'definitions':
return self._write_response(self._serialize_definitions(
script.goto_assignments(), request['id']))
elif lookup == 'arguments':
return self._write_response(self._serialize_arguments(
script, request['id']))
elif lookup == 'usages':
return self._write_response(self._serialize_usages(
script.usages(), request['id']))
else:
return self._write_response(
self._serialize_completions(script, request['id'],
request.get('prefix', '')))
def _write_response(self, response):
sys.stdout.write(response + '\n')
sys.stdout.flush()
def watch(self):
while True:
try:
self._process_request(self._input.readline())
except Exception:
sys.stderr.write(traceback.format_exc() + '\n')
sys.stderr.flush()
if __name__ == '__main__':
JediCompletion().watch()