bpython/bpython/autocomplete.py at master · studiovc/bpython · GitHub

History

630 lines (512 loc) · 19.1 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

# The MIT License

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

# THE SOFTWARE.

import __main__

import abc

import glob

import keyword

import logging

import os

import re

import rlcompleter

import builtins

from . import inspection

from . import importcompletion

from . import line as lineparts

from .line import LinePart

from .lazyre import LazyReCompile

from .simpleeval import safe_eval, evaluate_current_expression, EvaluationError

# Autocomplete modes

SIMPLE = "simple"

SUBSTRING = "substring"

FUZZY = "fuzzy"

ALL_MODES = (SIMPLE, SUBSTRING, FUZZY)

MAGIC_METHODS = tuple(

"__%s__" % s

for s in (

"init",

"repr",

"str",

"lt",

"le",

"eq",

"ne",

"gt",

"ge",

"cmp",

"hash",

"nonzero",

"unicode",

"getattr",

"setattr",

"get",

"set",

"call",

"len",

"getitem",

"setitem",

"iter",

"reversed",

"contains",

"add",

"sub",

"mul",

"floordiv",

"mod",

"divmod",

"pow",

"lshift",

"rshift",

"and",

"xor",

"or",

"div",

"truediv",

"neg",

"pos",

"abs",

"invert",

"complex",

"int",

"float",

"oct",

"hex",

"index",

"coerce",

"enter",

"exit",

)

KEYWORDS = frozenset(keyword.kwlist)

def after_last_dot(name):

return name.rstrip(".").rsplit(".")[-1]

def few_enough_underscores(current, match):

"""Returns whether match should be shown based on current

if current is _, True if match starts with 0 or 1 underscore

if current is __, True regardless of match

otherwise True if match does not start with any underscore

"""

if current.startswith("__"):

return True

elif current.startswith("_") and not match.startswith("__"):

return True

elif match.startswith("_"):

return False

else:

return True

def method_match_simple(word, size, text):

return word[:size] == text

def method_match_substring(word, size, text):

return text in word

def method_match_fuzzy(word, size, text):

s = r".*%s.*" % ".*".join(list(text))

return re.search(s, word)

MODES_MAP = {

SIMPLE: method_match_simple,

SUBSTRING: method_match_substring,

FUZZY: method_match_fuzzy,

}

class BaseCompletionType:

"""Describes different completion types"""

def __init__(self, shown_before_tab=True, mode=SIMPLE):

self._shown_before_tab = shown_before_tab

self.method_match = MODES_MAP[mode]

def matches(self, cursor_offset, line, **kwargs):

"""Returns a list of possible matches given a line and cursor, or None

if this completion type isn't applicable.

ie, import completion doesn't make sense if there cursor isn't after

an import or from statement, so it ought to return None.

Completion types are used to:

* `locate(cur, line)` their initial target word to replace given a

line and cursor

* find `matches(cur, line)` that might replace that word

* `format(match)` matches to be displayed to the user

* determine whether suggestions should be `shown_before_tab`

* `substitute(cur, line, match)` in a match for what's found with

`target`

"""

raise NotImplementedError

def locate(self, cursor_offset, line):

"""Returns a Linepart namedtuple instance or None given cursor and line

A Linepart namedtuple contains a start, stop, and word. None is

returned if no target for this type of completion is found under

the cursor."""

raise NotImplementedError

def format(self, word):

return word

def substitute(self, cursor_offset, line, match):

"""Returns a cursor offset and line with match swapped in"""

lpart = self.locate(cursor_offset, line)

offset = lpart.start + len(match)

changed_line = line[: lpart.start] + match + line[lpart.end :]

return offset, changed_line

@property

def shown_before_tab(self):

"""Whether suggestions should be shown before the user hits tab, or only

once that has happened."""

return self._shown_before_tab

class CumulativeCompleter(BaseCompletionType):

"""Returns combined matches from several completers"""

def __init__(self, completers, mode=SIMPLE):

if not completers:

raise ValueError(

"CumulativeCompleter requires at least one completer"

)

self._completers = completers

super().__init__(True, mode)

def locate(self, current_offset, line):

return self._completers[0].locate(current_offset, line)

def format(self, word):

return self._completers[0].format(word)

def matches(self, cursor_offset, line, **kwargs):

return_value = None

all_matches = set()

for completer in self._completers:

matches = completer.matches(

cursor_offset=cursor_offset, line=line, **kwargs

)

if matches is not None:

all_matches.update(matches)

return_value = all_matches

return return_value

class ImportCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

return importcompletion.complete(cursor_offset, line)

def locate(self, current_offset, line):

return lineparts.current_word(current_offset, line)

def format(self, word):

return after_last_dot(word)

class FilenameCompletion(BaseCompletionType):

def __init__(self, mode=SIMPLE):

super().__init__(False, mode)

def safe_glob(self, pathname):

return glob.iglob(glob.escape(pathname) + "*")

def matches(self, cursor_offset, line, **kwargs):

cs = lineparts.current_string(cursor_offset, line)

if cs is None:

return None

matches = set()

username = cs.word.split(os.path.sep, 1)[0]

user_dir = os.path.expanduser(username)

for filename in self.safe_glob(os.path.expanduser(cs.word)):

if os.path.isdir(filename):

filename += os.path.sep

if cs.word.startswith("~"):

filename = username + filename[len(user_dir) :]

matches.add(filename)

return matches

def locate(self, current_offset, line):

return lineparts.current_string(current_offset, line)

def format(self, filename):

filename.rstrip(os.sep).rsplit(os.sep)[-1]

if os.sep in filename[:-1]:

return filename[filename.rindex(os.sep, 0, -1) + 1 :]

else:

return filename

class AttrCompletion(BaseCompletionType):

attr_matches_re = LazyReCompile(r"(\w+(\.\w+)*)\.(\w*)")

def matches(self, cursor_offset, line, **kwargs):

if "locals_" not in kwargs:

return None

locals_ = kwargs["locals_"]

r = self.locate(cursor_offset, line)

if r is None:

return None

if locals_ is None: # TODO add a note about why

locals_ = __main__.__dict__

assert "." in r.word

for i in range(1, len(r.word) + 1):

if r.word[-i] == "[":

i -= 1

break

methodtext = r.word[-i:]

matches = {

"".join([r.word[:-i], m])

for m in self.attr_matches(methodtext, locals_)

}

return {

for m in matches

if few_enough_underscores(r.word.split(".")[-1], m.split(".")[-1])

}

def locate(self, current_offset, line):

return lineparts.current_dotted_attribute(current_offset, line)

def format(self, word):

return after_last_dot(word)

def attr_matches(self, text, namespace):

"""Taken from rlcompleter.py and bent to my will."""

m = self.attr_matches_re.match(text)

if not m:

return []

expr, attr = m.group(1, 3)

if expr.isdigit():

# Special case: float literal, using attrs here will result in

# a SyntaxError

return []

try:

obj = safe_eval(expr, namespace)

except EvaluationError:

return []

matches = self.attr_lookup(obj, expr, attr)

return matches

def attr_lookup(self, obj, expr, attr):

"""Second half of attr_matches."""

words = self.list_attributes(obj)

if inspection.hasattr_safe(obj, "__class__"):

words.append("__class__")

klass = inspection.getattr_safe(obj, "__class__")

words = words + rlcompleter.get_class_members(klass)

if not isinstance(klass, abc.ABCMeta):

try:

words.remove("__abstractmethods__")

except ValueError:

pass

matches = []

n = len(attr)

for word in words:

if self.method_match(word, n, attr) and word != "__builtins__":

matches.append(f"{expr}.{word}")

return matches

def list_attributes(self, obj):

# TODO: re-implement dir using getattr_static to avoid using

# AttrCleaner here?

with inspection.AttrCleaner(obj):

return dir(obj)

class DictKeyCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

if "locals_" not in kwargs:

return None

locals_ = kwargs["locals_"]

r = self.locate(cursor_offset, line)

if r is None:

return None

_, _, dexpr = lineparts.current_dict(cursor_offset, line)

try:

obj = safe_eval(dexpr, locals_)

except EvaluationError:

return None

if isinstance(obj, dict) and obj.keys():

matches = {

f"{k!r}]" for k in obj.keys() if repr(k).startswith(r.word)

}

return matches if matches else None

else:

return None

def locate(self, current_offset, line):

return lineparts.current_dict_key(current_offset, line)

def format(self, match):

return match[:-1]

class MagicMethodCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

if "current_block" not in kwargs:

return None

current_block = kwargs["current_block"]

r = self.locate(cursor_offset, line)

if r is None:

return None

if "class" not in current_block:

return None

return {name for name in MAGIC_METHODS if name.startswith(r.word)}

def locate(self, current_offset, line):

return lineparts.current_method_definition_name(current_offset, line)

class GlobalCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

"""Compute matches when text is a simple name.

Return a list of all keywords, built-in functions and names currently

defined in self.namespace that match.

"""

if "locals_" not in kwargs:

return None

locals_ = kwargs["locals_"]

r = self.locate(cursor_offset, line)

if r is None:

return None

matches = set()

n = len(r.word)

for word in KEYWORDS:

if self.method_match(word, n, r.word):

matches.add(word)

for nspace in (builtins.__dict__, locals_):

for word, val in nspace.items():

# if identifier isn't ascii, don't complete (syntax error)

if word is None:

continue

if (

self.method_match(word, n, r.word)

and word != "__builtins__"

matches.add(_callable_postfix(val, word))

return matches if matches else None

def locate(self, current_offset, line):

return lineparts.current_single_word(current_offset, line)

class ParameterNameCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

if "argspec" not in kwargs:

return None

argspec = kwargs["argspec"]

if not argspec:

return None

r = self.locate(cursor_offset, line)

if r is None:

return None

if argspec:

matches = {

name + "="

for name in argspec[1][0]

if isinstance(name, str) and name.startswith(r.word)

}

matches.update(

name + "=" for name in argspec[1][4] if name.startswith(r.word)

)

return matches if matches else None

def locate(self, current_offset, line):

return lineparts.current_word(current_offset, line)

class ExpressionAttributeCompletion(AttrCompletion):

# could replace attr completion as a more general case with some work

def locate(self, current_offset, line):

return lineparts.current_expression_attribute(current_offset, line)

def matches(self, cursor_offset, line, **kwargs):

if "locals_" not in kwargs:

return None

locals_ = kwargs["locals_"]

if locals_ is None:

locals_ = __main__.__dict__

attr = self.locate(cursor_offset, line)

try:

obj = evaluate_current_expression(cursor_offset, line, locals_)

except EvaluationError:

return set()

# strips leading dot

matches = [m[1:] for m in self.attr_lookup(obj, "", attr.word)]

return {m for m in matches if few_enough_underscores(attr.word, m)}

try:

import jedi

except ImportError:

class MultilineJediCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

return None

else:

class JediCompletion(BaseCompletionType):

def matches(self, cursor_offset, line, **kwargs):

if "history" not in kwargs:

return None

history = kwargs["history"]

if not lineparts.current_word(cursor_offset, line):

return None

history = "\n".join(history) + "\n" + line

try:

script = jedi.Script(history, path="fake.py")

completions = script.complete(

len(history.splitlines()), cursor_offset

)

except (jedi.NotFoundError, IndexError, KeyError):

# IndexError for #483

# KeyError for #544

self._orig_start = None

return None

if completions:

diff = len(completions[0].name) - len(completions[0].complete)

self._orig_start = cursor_offset - diff

else:

self._orig_start = None

return None

first_letter = line[self._orig_start : self._orig_start + 1]

matches = [c.name for c in completions]

if any(

not m.lower().startswith(matches[0][0].lower()) for m in matches

# Too general - giving completions starting with multiple

# letters

return None

else:

# case-sensitive matches only

return {m for m in matches if m.startswith(first_letter)}

def locate(self, cursor_offset, line):

start = self._orig_start

end = cursor_offset

return LinePart(start, end, line[start:end])

class MultilineJediCompletion(JediCompletion):

def matches(self, cursor_offset, line, **kwargs):

if "current_block" not in kwargs or "history" not in kwargs:

return None

current_block = kwargs["current_block"]

history = kwargs["history"]

if "\n" in current_block:

assert cursor_offset <= len(line), "{!r} {!r}".format(

cursor_offset,

line,

)

results = super().matches(cursor_offset, line, history=history)

return results

else:

return None

def get_completer(completers, cursor_offset, line, **kwargs):

"""Returns a list of matches and an applicable completer

If no matches available, returns a tuple of an empty list and None

cursor_offset is the current cursor column

line is a string of the current line

kwargs (all optional):

locals_ is a dictionary of the environment

argspec is an inspect.ArgSpec instance for the current function where

the cursor is

current_block is the possibly multiline not-yet-evaluated block of

code which the current line is part of

complete_magic_methods is a bool of whether we ought to complete

double underscore methods like __len__ in method signatures

"""

for completer in completers:

try:

matches = completer.matches(cursor_offset, line, **kwargs)

except Exception as e:

# Instead of crashing the UI, log exceptions from autocompleters.

logger = logging.getLogger(__name__)

logger.debug(

"Completer {} failed with unhandled exception: {}".format(

completer, e

)

continue

if matches is not None:

return sorted(matches), (completer if matches else None)

return [], None

def get_default_completer(mode=SIMPLE):

return (

DictKeyCompletion(mode=mode),

ImportCompletion(mode=mode),

FilenameCompletion(mode=mode),

MagicMethodCompletion(mode=mode),

MultilineJediCompletion(mode=mode),

CumulativeCompleter(

(GlobalCompletion(mode=mode), ParameterNameCompletion(mode=mode)),

mode=mode,

AttrCompletion(mode=mode),

ExpressionAttributeCompletion(mode=mode),

)

def get_completer_bpython(cursor_offset, line, **kwargs):

""""""

return get_completer(get_default_completer(), cursor_offset, line, **kwargs)

def _callable_postfix(value, word):

"""rlcompleter's _callable_postfix done right."""

if callable(value):

word += "("

return word

bpython/bpython/autocomplete.py at master · studiovc/bpython · GitHub

Expand file tree

Breadcrumbs

autocomplete.py

Latest commit

History

Breadcrumbs

autocomplete.py

File metadata and controls