vscode-python/pythonFiles/completion.py at master · lsfgrd/vscode-python · GitHub

History

651 lines (579 loc) · 24.6 KB

Raw

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

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

import os

import io

import re

import sys

import json

import traceback

import platform

jediPreview = False

class RedirectStdout(object):

def __init__(self, new_stdout=None):

"""If stdout is None, redirect to /dev/null"""

self._new_stdout = new_stdout or open(os.devnull, 'w')

def __enter__(self):

sys.stdout.flush()

self.oldstdout_fno = os.dup(sys.stdout.fileno())

os.dup2(self._new_stdout.fileno(), 1)

def __exit__(self, exc_type, exc_value, traceback):

self._new_stdout.flush()

os.dup2(self.oldstdout_fno, 1)

os.close(self.oldstdout_fno)

class JediCompletion(object):

basic_types = {

'module': 'import',

'instance': 'variable',

'statement': 'value',

'param': 'variable',

}

def __init__(self):

self.default_sys_path = sys.path

self.environment = jedi.api.environment.Environment(sys.prefix, sys.executable)

self._input = io.open(sys.stdin.fileno(), encoding='utf-8')

if (os.path.sep == '/') and (platform.uname()[2].find('Microsoft') > -1):

# WSL; does not support UNC paths

self.drive_mount = '/mnt/'

elif sys.platform == 'cygwin':

# cygwin

self.drive_mount = '/cygdrive/'

else:

# Do no normalization, e.g. Windows build of Python.

# Could add additional test: ((os.path.sep == '/') and os.path.isdir('/mnt/c'))

# However, this may have more false positives trying to identify Windows/*nix hybrids

self.drive_mount = ''

def _get_definition_type(self, definition):

# if definition.type not in ['import', 'keyword'] and is_built_in():

# return 'builtin'

try:

if definition.type in ['statement'] and definition.name.isupper():

return 'constant'

return self.basic_types.get(definition.type, definition.type)

except Exception:

return 'builtin'

def _additional_info(self, completion):

"""Provide additional information about the completion object."""

if not hasattr(completion, '_definition') or 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 completion.type in ['module'] or not hasattr(completion, 'params'):

return ''

return '%s(%s)' % (

completion.name,

', '.join(p.description[6:] for p in completion.params if p))

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 = []

except :

call_signatures = []

for signature in call_signatures:

for pos, param in enumerate(signature.params):

if not param.name:

continue

name = self._get_param_name(param)

if param.name == 'self' and pos == 0:

continue

if name.startswith('*'):

continue

value = self._get_param_value(param)

_signatures.append((signature, name, value))

return _signatures

def _get_param_name(self, p):

if(p.name.startswith('param ')):

return p.name[6:] # drop leading 'param '

return p.name

def _get_param_value(self, p):

pair = p.description.split('=')

if(len(pair) > 1):

return pair[1]

return None

def _get_call_signatures_with_args(self, script):

"""Extract call signatures from jedi.api.Script object in failsafe way.

Returns:

Array with dictionary

"""

_signatures = []

try:

call_signatures = script.call_signatures()

except KeyError:

call_signatures = []

for signature in call_signatures:

sig = {"name": "", "description": "", "docstring": "",

"paramindex": 0, "params": [], "bracketstart": []}

sig["description"] = signature.description

try:

sig["docstring"] = signature.docstring()

sig["raw_docstring"] = signature.docstring(raw=True)

except Exception:

sig["docstring"] = ''

sig["raw_docstring"] = ''

sig["name"] = signature.name

sig["paramindex"] = signature.index

sig["bracketstart"].append(signature.index)

_signatures.append(sig)

for pos, param in enumerate(signature.params):

if not param.name:

continue

name = self._get_param_name(param)

if param.name == 'self' and pos == 0:

continue

value = self._get_param_value(param)

paramDocstring = ''

try:

paramDocstring = param.docstring()

except Exception:

paramDocstring = ''

sig["params"].append({"name": name, "value": value, "docstring": paramDocstring, "description": param.description})

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',

'raw_type': '',

'rightLabel': self._additional_info(signature)

}

_completion['description'] = ''

_completion['raw_docstring'] = ''

# we pass 'text' here only for fuzzy matcher

if value:

_completion['snippet'] = '%s=${1:%s}$0' % (name, value)

_completion['text'] = '%s=' % (name)

else:

_completion['snippet'] = '%s=$1$0' % name

_completion['text'] = name

_completion['displayText'] = name

_completions.append(_completion)

try:

completions = script.completions()

except KeyError:

completions = []

except :

completions = []

for completion in completions:

try:

_completion = {

'text': completion.name,

'type': self._get_definition_type(completion),

'raw_type': completion.type,

'rightLabel': self._additional_info(completion)

}

except Exception:

continue

for c in _completions:

if c['text'] == _completion['text']:

c['type'] = _completion['type']

c['raw_type'] = _completion['raw_type']

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_methods(self, script, identifier=None, prefix=''):

_methods = []

try:

completions = script.completions()

except KeyError:

return []

for completion in completions:

if completion.name == '__autocomplete_python':

instance = completion.parent().name

break

else:

instance = 'self.__class__'

for completion in completions:

params = []

if hasattr(completion, 'params'):

params = [p.description for p in completion.params if p]

if completion.parent().type == 'class':

_methods.append({

'parent': completion.parent().name,

'instance': instance,

'name': completion.name,

'params': params,

'moduleName': completion.module_name,

'fileName': completion.module_path,

'line': completion.line,

'column': completion.column,

})

return json.dumps({'id': identifier, 'results': _methods})

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.

"""

return json.dumps({"id": identifier, "results": self._get_call_signatures_with_args(script)})

def _top_definition(self, definition):

for d in definition.goto_assignments():

if d == definition:

continue

if d.type == 'import':

return self._top_definition(d)

else:

return d

return definition

def _extract_range_jedi_0_11_1(self, definition):

from parso.utils import split_lines

# get the scope range

try:

if definition.type in ['class', 'function']:

tree_name = definition._name.tree_name

scope = tree_name.get_definition()

start_line = scope.start_pos[0] - 1

start_column = scope.start_pos[1]

# get the lines

code = scope.get_code(include_prefix=False)

lines = split_lines(code)

# trim the lines

lines = '\n'.join(lines).rstrip().split('\n')

end_line = start_line + len(lines) - 1

end_column = len(lines[-1]) - 1

else:

symbol = definition._name.tree_name

start_line = symbol.start_pos[0] - 1

start_column = symbol.start_pos[1]

end_line = symbol.end_pos[0] - 1

end_column = symbol.end_pos[1]

return {

'start_line': start_line,

'start_column': start_column,

'end_line': end_line,

'end_column': end_column

}

except Exception as e:

return {

'start_line': definition.line - 1,

'start_column': definition.column,

'end_line': definition.line - 1,

'end_column': definition.column

}

def _extract_range(self, definition):

"""Provides the definition range of a given definition

For regular symbols it returns the start and end location of the

characters making up the symbol.

For scoped containers it will return the entire definition of the

scope.

The scope that jedi provides ends with the first character of the next

scope so it's not ideal. For vscode we need the scope to end with the

last character of actual code. That's why we extract the lines that

make up our scope and trim the trailing whitespace.

"""

return self._extract_range_jedi_0_11_1(definition)

def _get_definitionsx(self, definitions, identifier=None, ignoreNoModulePath=False):

"""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.

"""

_definitions = []

for definition in definitions:

try:

if definition.type == 'import':

definition = self._top_definition(definition)

definitionRange = {

'start_line': 0,

'start_column': 0,

'end_line': 0,

'end_column': 0

}

module_path = ''

if hasattr(definition, 'module_path') and definition.module_path:

module_path = definition.module_path

definitionRange = self._extract_range(definition)

else:

if not ignoreNoModulePath:

continue

try:

parent = definition.parent()

container = parent.name if parent.type != 'module' else ''

except Exception:

container = ''

try:

docstring = definition.docstring()

rawdocstring = definition.docstring(raw=True)

except Exception:

docstring = ''

rawdocstring = ''

_definition = {

'text': definition.name,

'type': self._get_definition_type(definition),

'raw_type': definition.type,

'fileName': module_path,

'container': container,

'range': definitionRange,

'description': definition.description,

'docstring': docstring,

'raw_docstring': rawdocstring,

'signature': self._generate_signature(definition)

}

_definitions.append(_definition)

except Exception as e:

pass

return _definitions

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.

"""

_definitions = []

for definition in definitions:

try:

if definition.module_path:

if definition.type == 'import':

definition = self._top_definition(definition)

if not definition.module_path:

continue

try:

parent = definition.parent()

container = parent.name if parent.type != 'module' else ''

except Exception:

container = ''

try:

docstring = definition.docstring()

rawdocstring = definition.docstring(raw=True)

except Exception:

docstring = ''

rawdocstring = ''

_definition = {

'text': definition.name,

'type': self._get_definition_type(definition),

'raw_type': definition.type,

'fileName': definition.module_path,

'container': container,

'range': self._extract_range(definition),

'description': definition.description,

'docstring': docstring,

'raw_docstring': rawdocstring

}

_definitions.append(_definition)

except Exception as e:

pass

return json.dumps({'id': identifier, 'results': _definitions})

def _serialize_tooltip(self, definitions, identifier=None):

_definitions = []

for definition in definitions:

signature = definition.name

description = None

if definition.type in ['class', 'function']:

signature = self._generate_signature(definition)

try:

description = definition.docstring(raw=True).strip()

except Exception:

description = ''

if not description and not hasattr(definition, 'get_line_code'):

# jedi returns an empty string for compiled objects

description = definition.docstring().strip()

if definition.type == 'module':

signature = definition.full_name

try:

description = definition.docstring(raw=True).strip()

except Exception:

description = ''

if not description and hasattr(definition, 'get_line_code'):

# jedi returns an empty string for compiled objects

description = definition.docstring().strip()

_definition = {

'type': self._get_definition_type(definition),

'text': definition.name,

'description': description,

'docstring': description,

'signature': signature

}

_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 _normalize_request_path(self, request):

"""Normalize any Windows paths received by a *nix build of

Python. Does not alter the reverse os.path.sep=='\\',

i.e. *nix paths received by a Windows build of Python.

"""

if 'path' in request:

if not self.drive_mount:

return

newPath = request['path'].replace('\\', '/')

if newPath[0:1] == '/':

# is absolute path with no drive letter

request['path'] = newPath

elif newPath[1:2] == ':':

# is path with drive letter, only absolute can be mapped

request['path'] = self.drive_mount + newPath[0:1].lower() + newPath[2:]

else:

# is relative path

request['path'] = newPath

def _process_request(self, request):

"""Accept serialized request from VSCode and write response.

"""

request = self._deserialize(request)

self._set_request_config(request.get('config', {}))

self._normalize_request_path(request)

path = self._get_top_level_module(request.get('path', ''))

if len(path) > 0 and path not in sys.path:

sys.path.insert(0, path)

lookup = request.get('lookup', 'completions')

if lookup == 'names':

return self._serialize_definitions(

jedi.api.names(

source=request.get('source', None),

path=request.get('path', ''),

all_scopes=True),

request['id'])

script = jedi.Script(

source=request.get('source', None), line=request['line'] + 1,

column=request['column'], path=request.get('path', ''),

sys_path=sys.path, environment=self.environment)

if lookup == 'definitions':

defs = self._get_definitionsx(script.goto_assignments(follow_imports=True), request['id'])

return json.dumps({'id': request['id'], 'results': defs})

if lookup == 'tooltip':

if jediPreview:

defs = []

try:

defs = self._get_definitionsx(script.goto_definitions(), request['id'], True)

except:

pass

try:

if len(defs) == 0:

defs = self._get_definitionsx(script.goto_assignments(), request['id'], True)

except:

pass

return json.dumps({'id': request['id'], 'results': defs})

else:

try:

return self._serialize_tooltip(script.goto_definitions(), request['id'])

except:

return json.dumps({'id': request['id'], 'results': []})

elif lookup == 'arguments':

return self._serialize_arguments(

script, request['id'])

elif lookup == 'usages':

return self._serialize_usages(

script.usages(), request['id'])

elif lookup == 'methods':

return self._serialize_methods(script, request['id'],

request.get('prefix', ''))

else:

return 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:

rq = self._input.readline()

if len(rq) == 0:

# Reached EOF - indication our parent process is gone.

sys.stderr.write('Received EOF from the standard input,exiting' + '\n')

sys.stderr.flush()

return

with RedirectStdout():

response = self._process_request(rq)

self._write_response(response)

except Exception:

sys.stderr.write(traceback.format_exc() + '\n')

sys.stderr.flush()

if __name__ == '__main__':

cachePrefix = 'v'

modulesToLoad = ''

if len(sys.argv) > 2 and sys.argv[1] == 'custom':

jediPath = sys.argv[2]

jediPreview = True

cachePrefix = 'custom_v'

if len(sys.argv) > 3:

modulesToLoad = sys.argv[3]

else:

#release

jediPath = os.path.dirname(__file__)

if len(sys.argv) > 1:

modulesToLoad = sys.argv[1]

sys.path.insert(0, jediPath)

import jedi

if jediPreview:

jedi.settings.cache_directory = os.path.join(

jedi.settings.cache_directory, cachePrefix + jedi.__version__.replace('.', ''))

# remove jedi from path after we import it so it will not be completed

sys.path.pop(0)

if len(modulesToLoad) > 0:

jedi.preload_module(*modulesToLoad.split(','))

JediCompletion().watch()

vscode-python/pythonFiles/completion.py at master · lsfgrd/vscode-python · GitHub

Expand file tree

Breadcrumbs

completion.py

Latest commit

History

Breadcrumbs

completion.py

File metadata and controls