pythonnative/src/pythonnative/devclient.py at main · pythonnative/pythonnative · GitHub

History

869 lines (741 loc) · 31.4 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

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

"""The on-device dev client: sync sources from ``pn start`` and Fast Refresh.

A debug build of a PythonNative app is a *dev client*. On launch it

connects to the dev server (``pn start`` / ``pn preview`` / ``pn run``)

over WebSocket, reports the sources it already holds, receives whatever

is missing, and from then on applies every save as a Fast Refresh. Its

``print`` output and errors stream back to the terminal running the

server, so the device log viewer is optional.

How the pieces fit:

- The native template configures a writable **overlay** directory

(``pythonnative.hot_reload.configure_dev_environment``) ahead of the

bundled sources on ``sys.path`` and exposes the server URL the CLI

baked in as ``PN_DEV_SERVER``. ``pythonnative.bootstrap.start(dev=True)``

calls [`start_if_configured`][pythonnative.devclient.start_if_configured].

- A build made with ``pn run <platform> --dev-client`` has no app of

its own: its bundled ``app/main.py`` renders

[`ConnectScreen`][pythonnative.devclient.ConnectScreen], where the

developer types (or picks) a server URL. Once the first sync lands,

the real ``app.main`` from the overlay shadows the placeholder and

the screen remounts into the developer's app. The URL is remembered

for the next launch.

All network I/O runs on a daemon thread; file writes happen there too,

and the reload itself runs on the application thread through

``call_on_application_thread``.

"""

from __future__ import annotations

import base64

import hashlib

import json

import os

import socket

import sys

import threading

import time

import traceback

from typing import Any, Callable, Dict, List, Optional, Tuple

from urllib.parse import parse_qsl, urlencode, urlsplit, urlunsplit

from .assets import configure_native, manifest_for_sync

from .devserver import ws

from .devserver.watcher import is_synced_file, modules_for_paths

from .utils import overlay_root

__all__ = [

"ConnectScreen",

"DevClient",

"current",

"display_server_url",

"normalize_server_url",

"saved_server_url",

"start",

"start_if_configured",

"stop",

]

SERVER_URL_ENV = "PN_DEV_SERVER"

"""Environment variable carrying the dev server URL baked in by ``pn run``."""

DEV_CLIENT_ENV = "PN_DEV_CLIENT"

"""Set to ``1`` in ``--dev-client`` builds (the connect screen remembers URLs)."""

_SAVED_URL_FILE = "server.json"

_RECONNECT_DELAYS = (0.5, 1.0, 2.0, 3.0, 5.0)

Logger = Callable[[str], None]

_current: Optional["DevClient"] = None

_lock = threading.Lock()

# ======================================================================

# URLs

# ======================================================================

def normalize_server_url(text: str) -> str:

"""Turn whatever the developer typed into a dev-client WebSocket URL.

Accepts ``192.168.1.20``, ``192.168.1.20:8765``, ``http://host:port``,

``ws://host:port``, and full URLs with a path, such as the device URL

``pn start`` prints (``http://192.168.1.20:8765/?token=...``). The

result always has the path ``/ws`` and the query

``role=client&token=...``; the dev token is kept when the input

carries one.

"""

from .devserver.auth import QUERY_PARAM

value = (text or "").strip()

if not value:

raise ValueError("empty server address")

if "://" not in value:

value = "ws://" + value

parts = urlsplit(value)

scheme = {"http": "ws", "ws": "ws", "https": "wss", "wss": "wss"}.get(parts.scheme.lower())

if scheme is None:

raise ValueError(f"unsupported dev server scheme in {text!r}")

hostport = parts.netloc

if not hostport:

raise ValueError(f"missing host in {text!r}")

if ":" not in hostport:

from .devserver.server import DEFAULT_PORT

hostport = f"{hostport}:{DEFAULT_PORT}"

query: List[Tuple[str, str]] = [("role", "client")]

token = dict(parse_qsl(parts.query)).get(QUERY_PARAM)

if token:

query.append((QUERY_PARAM, token))

return urlunsplit((scheme, hostport, "/ws", urlencode(query), ""))

def display_server_url(url: str) -> str:

"""The short form of a dev-client URL for the connect screen (``host:port/?token=...``)."""

from .devserver.auth import QUERY_PARAM

parts = urlsplit(url)

token = dict(parse_qsl(parts.query)).get(QUERY_PARAM)

return parts.netloc + (f"/?{urlencode({QUERY_PARAM: token})}" if token else "")

def _saved_url_path(overlay: str) -> str:

return os.path.join(overlay, _SAVED_URL_FILE)

def saved_server_url(overlay: Optional[str] = None) -> Optional[str]:

"""The URL remembered by a previous connection (``--dev-client`` builds)."""

root = overlay or overlay_root()

if not root:

return None

try:

with open(_saved_url_path(root), encoding="utf-8") as handle:

data = json.load(handle)

except (OSError, ValueError):

return None

url = data.get("url") if isinstance(data, dict) else None

return str(url) if url else None

def _save_server_url(overlay: str, url: str) -> None:

try:

os.makedirs(overlay, exist_ok=True)

with open(_saved_url_path(overlay), "w", encoding="utf-8") as handle:

json.dump({"url": url, "saved_at": time.time()}, handle)

except OSError:

pass

# ======================================================================

# Log forwarding

# ======================================================================

class _Tee:

"""A text stream that writes through and also forwards whole lines."""

def __init__(self, inner: Any, forward: Callable[[str], None]) -> None:

self._inner = inner

self._forward = forward

self._buffer = ""

def write(self, text: str) -> int:

try:

self._inner.write(text)

except Exception:

pass

self._buffer += text

if "\n" in self._buffer:

lines = self._buffer.split("\n")

self._buffer = lines.pop()

for line in lines:

if line:

self._forward(line)

return len(text)

def flush(self) -> None:

try:

self._inner.flush()

except Exception:

pass

if self._buffer:

line, self._buffer = self._buffer, ""

self._forward(line)

def isatty(self) -> bool:

return False

def fileno(self) -> int:

return self._inner.fileno()

def __getattr__(self, name: str) -> Any:

return getattr(self._inner, name)

# ======================================================================

# The client

# ======================================================================

class DevClient:

"""Keep this process in sync with a dev server.

Args:

url: Server URL (any form accepted by

[`normalize_server_url`][pythonnative.devclient.normalize_server_url]).

overlay: Writable directory that shadows the bundled sources.

entry_module: The app's entry module, for the ``hello`` message.

forward_logs: Mirror ``print`` output to the server.

log: Local logger for the client's own status lines.

"""

def __init__(

self,

url: str,

overlay: str,

entry_module: str = "app.main",

forward_logs: bool = True,

log: Optional[Logger] = None,

) -> None:

self.url = normalize_server_url(url)

self.overlay = os.path.abspath(overlay)

self.entry_module = entry_module

self._forward_logs = forward_logs

self._log: Logger = log or self._default_log

self._thread: Optional[threading.Thread] = None

self._stop = threading.Event()

self._socket: Optional[ws.WebSocketClient] = None

self._state = "idle"

self._state_lock = threading.Lock()

self._listeners: List[Callable[[str, str], None]] = []

self._outbox: List[str] = []

self._outbox_lock = threading.Lock()

self._tee_installed = False

self._orig_stdout: Any = None

self._orig_stderr: Any = None

self._device = ""

self.synced_version: Optional[str] = None

self.synced_once = threading.Event()

# -- state -----------------------------------------------------------

@property

def server_label(self) -> str:

"""``host:port`` of the server, for logs (the full URL carries the dev token)."""

return urlsplit(self.url).netloc

@property

def state(self) -> str:

"""``"idle"``, ``"connecting"``, ``"connected"``, ``"syncing"``, or ``"disconnected"``."""

with self._state_lock:

return self._state

def add_listener(self, callback: Callable[[str, str], None]) -> Callable[[], None]:

"""Subscribe to ``(state, detail)`` changes (called on the client thread)."""

self._listeners.append(callback)

def _remove() -> None:

try:

self._listeners.remove(callback)

except ValueError:

pass

return _remove

def _set_state(self, state: str, detail: str = "") -> None:

with self._state_lock:

self._state = state

for listener in list(self._listeners):

try:

listener(state, detail)

except Exception:

pass

# -- lifecycle -------------------------------------------------------

def start(self) -> None:

"""Connect on a daemon thread (idempotent)."""

if self._thread is not None:

return

self._stop.clear()

# Resolve device metadata before starting the network worker.

self._device = _device_name()

self._install_tee()

self._thread = threading.Thread(target=self._run, name="pn-dev-client", daemon=True)

self._thread.start()

def stop(self) -> None:

"""Disconnect and stop the thread."""

self._stop.set()

sock = self._socket

if sock is not None:

try:

sock.close()

except Exception:

pass

thread, self._thread = self._thread, None

if thread is not None and thread is not threading.current_thread():

thread.join(timeout=3.0)

self._remove_tee()

self._set_state("idle")

def _run(self) -> None:

attempt = 0

while not self._stop.is_set():

self._set_state("connecting", self.server_label)

try:

self._session()

attempt = 0

except (OSError, ws.WebSocketError) as exc:

detail = f"{type(exc).__name__}: {exc}"

refused = isinstance(exc, ws.HandshakeError) and any(f" {code} " in f"{exc} " for code in (401, 403))

if refused:

detail = "the dev server refused this client's token"

self._set_state("disconnected", detail)

if attempt == 0 and refused:

self._log(

f"[pn dev] {self.server_label} refused the connection: the URL is missing the dev "

"token or carries an old one. Relaunch with `pn run`, or enter the device URL that "

"`pn start` prints."

)

elif attempt == 0:

self._log(f"[pn dev] cannot reach {self.server_label} ({detail}); retrying")

except Exception as exc:

self._set_state("disconnected", repr(exc))

self._log(f"[pn dev] client error: {exc!r}")

traceback.print_exc(file=self._local_stderr())

if self._stop.is_set():

break

delay = _RECONNECT_DELAYS[min(attempt, len(_RECONNECT_DELAYS) - 1)]

attempt += 1

self._stop.wait(delay)

def _session(self) -> None:

client = ws.WebSocketClient(self.url, timeout=1.0)

client.connect()

self._socket = client

try:

client.send_text(json.dumps(self._hello()))

self._set_state("connected", self.server_label)

self._flush_outbox()

while not self._stop.is_set():

try:

text = client.recv()

except socket.timeout:

self._flush_outbox()

continue

if text is None:

break

self._flush_outbox()

try:

message = json.loads(text)

except ValueError:

continue

if isinstance(message, dict):

self._handle(message)

finally:

self._socket = None

try:

client.close()

except Exception:

pass

if not self._stop.is_set():

self._set_state("disconnected", "connection closed")

# -- protocol --------------------------------------------------------

def _hello(self) -> Dict[str, Any]:

from .platform import Platform

self._seed_overlay_from_bundle()

return {

"type": "hello",

"platform": Platform.OS,

"device": self._device,

"app": self.entry_module,

"files": self._overlay_manifest(),

}

def _seed_overlay_from_bundle(self) -> None:

"""Copy the bundled sources into an empty overlay before the first ``hello``.

The overlay must be a complete tree (a partial ``app/`` without

``__init__.py`` would lose to the bundled package on ``sys.path``),

so the first sync used to download every file and reload every

module even when the build was made from the very sources the

server holds. Seeding from the bundle lets the manifest report

what the app already runs; the server then sends only real

differences, and an up-to-date build connects without a reload.

"""

top = self.entry_module.split(".")[0]

if not top or self._overlay_has_files(top):

return

root = _bundled_package_root(top, exclude=self.overlay)

if root is None:

self._log(f"[pn dev] bundled sources for '{top}' not found; the server will send everything")

return

seeded = 0

def copy_tree(node: Any, rel: str) -> None:

nonlocal seeded

try:

children = list(node.iterdir())

except Exception as exc:

self._log(f"[pn dev] could not list bundled {rel}: {exc}")

return

for child in children:

child_rel = f"{rel}/{child.name}"

if child.is_dir():

if child.name != "__pycache__":

copy_tree(child, child_rel)

continue

if not is_synced_file(child_rel):

continue

target = os.path.join(self.overlay, *child_rel.split("/"))

try:

data = child.read_bytes()

os.makedirs(os.path.dirname(target), exist_ok=True)

with open(target, "wb") as handle:

handle.write(data)

seeded += 1

except Exception as exc:

self._log(f"[pn dev] could not seed {child_rel}: {exc}")

copy_tree(root, top)

self._log(f"[pn dev] seeded the overlay with {seeded} bundled file(s) from {root}")

def _overlay_has_files(self, top: str) -> bool:

"""Whether the overlay already holds sources for ``top``.

``configure_dev_environment`` pre-creates the (empty) package

directory, so the directory's existence says nothing; byte-code

caches don't count either.

"""

for dirpath, dirnames, filenames in os.walk(os.path.join(self.overlay, top)):

dirnames[:] = [d for d in dirnames if d != "__pycache__"]

if filenames:

return True

return False

def _overlay_manifest(self) -> Dict[str, str]:

files: Dict[str, str] = {}

base = self.overlay

for dirpath, dirnames, filenames in os.walk(base):

dirnames[:] = [d for d in dirnames if d != "__pycache__"]

for name in filenames:

full = os.path.join(dirpath, name)

rel = os.path.relpath(full, base).replace(os.sep, "/")

if rel == _SAVED_URL_FILE or not is_synced_file(rel):

continue

try:

with open(full, "rb") as handle:

files[rel] = hashlib.sha256(handle.read()).hexdigest()

except OSError:

continue

return files

def _handle(self, message: Dict[str, Any]) -> None:

kind = message.get("type")

if kind not in ("sync", "update"):

return

self._set_state("syncing", str(message.get("version") or ""))

files = message.get("files") or []

removed = message.get("removed") or []

written: List[str] = []

for entry in files:

if not isinstance(entry, dict):

continue

path = str(entry.get("path") or "")

if not path or not self._safe_relpath(path):

continue

data = _decode_content(entry)

if data is None:

continue

target = os.path.join(self.overlay, *path.split("/"))

try:

os.makedirs(os.path.dirname(target), exist_ok=True)

with open(target, "wb") as handle:

handle.write(data)

written.append(path)

except OSError as exc:

self._log(f"[pn dev] could not write {path}: {exc}")

for path in removed:

rel = str(path)

if not self._safe_relpath(rel):

continue

try:

os.remove(os.path.join(self.overlay, *rel.split("/")))

except OSError:

pass

written.append(rel)

version = str(message.get("version") or "")

self.synced_version = version

self.synced_once.set()

_save_server_url(self.overlay, self.url)

self._set_state("connected", version)

if not written:

# The app already runs these exact sources (a fresh build, or an

# overlay from the last session): nothing to reload.

return

self._log(f"[pn dev] synced {len(written)} file(s) from {self.server_label}")

modules = modules_for_paths(written)

assets_changed = bool(manifest_for_sync(written))

if modules or assets_changed:

self._schedule_reload(modules, version, assets_changed=assets_changed)

def _schedule_reload(self, modules: List[str], version: str, *, assets_changed: bool = False) -> None:

from .runtime import call_on_application_thread

def _apply() -> None:

from .hot_reload import apply_reload

if assets_changed:

# Push the overlay manifest first so reloaded components

# (and the native image views) resolve the new files.

configure_native()

if not modules:

return

result = apply_reload(modules)

if result.mode == "error":

self.send({"type": "error", "phase": "hot reload", "text": result.error or "unknown error"})

elif result.mode != "none":

self.send(

{"type": "reloaded", "version": version, "mode": result.mode, "modules": result.reloaded or modules}

)

call_on_application_thread(_apply)

def _safe_relpath(self, rel: str) -> bool:

parts = rel.split("/")

return bool(parts) and all(part and part not in (".", "..") for part in parts)

# -- outbound --------------------------------------------------------

def send(self, message: Dict[str, Any]) -> None:

"""Queue a message to the server (dropped when the outbox overflows offline)."""

text = json.dumps(message)

with self._outbox_lock:

if len(self._outbox) > 500:

del self._outbox[:100]

self._outbox.append(text)

sock = self._socket

if sock is not None and threading.current_thread() is self._thread:

self._flush_outbox()

def _flush_outbox(self) -> None:

sock = self._socket

if sock is None:

return

while True:

with self._outbox_lock:

if not self._outbox:

return

text = self._outbox.pop(0)

try:

sock.send_text(text)

except Exception:

with self._outbox_lock:

self._outbox.insert(0, text)

return

def log(self, text: str, level: str = "info") -> None:

"""Forward one log line to the server."""

self.send({"type": "log", "level": level, "text": text})

def report_error(self, phase: str, text: str) -> None:

"""Forward an error report (a traceback) to the server."""

self.send({"type": "error", "phase": phase, "text": text})

# -- stdout / stderr tee -----------------------------------------------

def _local_stderr(self) -> Any:

"""The process's real stderr, bypassing the tee (so status lines stay local).

Not ``sys.__stderr__``: embedded interpreters replace ``sys.stderr``

with a stream that reaches the platform log (logcat, the Xcode

console) while the original file descriptor goes nowhere.

"""

stream = sys.stderr

while isinstance(stream, _Tee):

stream = stream._inner

return stream if stream is not None else sys.__stderr__

def _default_log(self, line: str) -> None:

try:

print(line, file=self._local_stderr(), flush=True)

except Exception:

pass

def _install_tee(self) -> None:

if not self._forward_logs or self._tee_installed:

return

self._tee_installed = True

self._orig_stdout, self._orig_stderr = sys.stdout, sys.stderr

sys.stdout = _Tee(self._orig_stdout, lambda line: self.log(line, "info"))

sys.stderr = _Tee(self._orig_stderr, lambda line: self.log(line, "error"))

def _remove_tee(self) -> None:

if not self._tee_installed:

return

self._tee_installed = False

if isinstance(sys.stdout, _Tee):

sys.stdout = self._orig_stdout

if isinstance(sys.stderr, _Tee):

sys.stderr = self._orig_stderr

def _device_name() -> str:

"""A short device label for the server's client list (``iPhone``, ``Pixel 8``)."""

try:

from .native_modules.registry import native_module

info = native_module("Device").call("info")

if isinstance(info, dict):

return str(info.get("model") or info.get("os") or "")

except Exception:

pass

return ""

def _bundled_package_root(top: str, *, exclude: str) -> Optional[Any]:

"""A ``Traversable`` for the bundled top-level package ``top``, ignoring the overlay.

Resolves through ``sys.path`` the way the import system would once the

overlay is out of the picture, without importing anything, then asks

the loader for its resource reader. On iOS that is a plain directory;

under Chaquopy the ``.py`` sources live in the APK's asset archive and

only the reader can list and read them (``os.walk`` on the extracted

directory sees data files alone).

"""

import importlib.machinery

excluded = os.path.abspath(exclude)

search = [p for p in sys.path if p and os.path.abspath(p) != excluded]

try:

spec = importlib.machinery.PathFinder.find_spec(top, search)

except Exception:

return None

if spec is None or not spec.submodule_search_locations or spec.loader is None:

return None

get_reader = getattr(spec.loader, "get_resource_reader", None)

if get_reader is None:

return None

try:

reader = get_reader(top)

files = getattr(reader, "files", None)

root = files() if files is not None else None

except Exception:

return None

if root is None or not root.is_dir():

return None

return root

def _decode_content(entry: Dict[str, Any]) -> Optional[bytes]:

content = entry.get("content")

if not isinstance(content, str):

return None

if entry.get("encoding") == "base64":

try:

return base64.b64decode(content)

except (ValueError, TypeError):

return None

return content.encode("utf-8")

# ======================================================================

# Process-wide client

# ======================================================================

def current() -> Optional[DevClient]:

"""The running dev client, if any."""

return _current

def start(url: str, overlay: Optional[str] = None, **kwargs: Any) -> DevClient:

"""Start (or replace) the process-wide dev client for ``url``."""

global _current

from .hot_reload import configure_dev_environment

root = overlay or overlay_root()

if root is None:

root = configure_dev_environment(os.path.join(os.path.expanduser("~"), ".pythonnative"))

with _lock:

previous = _current

if previous is not None:

previous.stop()

client = DevClient(url, root, **kwargs)

_current = client

client.start()

return client

def stop() -> None:

"""Stop the process-wide dev client."""

global _current

with _lock:

client, _current = _current, None

if client is not None:

client.stop()

def start_if_configured(entry_module: Optional[str] = None) -> Optional[DevClient]:

"""Start the dev client when the build points at a server.

Called by ``bootstrap.start(dev=True)``. The URL comes from

``PN_DEV_SERVER`` (baked in by ``pn run``) or, for ``--dev-client``

builds, from the URL saved by a previous connection. Returns the

client, or ``None`` when nothing is configured.

"""

root = overlay_root()

if root is None:

return None

url = os.environ.get(SERVER_URL_ENV) or saved_server_url(root)

if not url:

return None

entry = entry_module or os.environ.get("PN_ENTRY_MODULE") or "app.main"

try:

return start(url, root, entry_module=entry)

except Exception as exc:

print(f"[pn dev] could not start the dev client: {exc!r}", file=sys.stderr)

return None

# ======================================================================

# Connect screen (dev-client builds)

# ======================================================================

def _connect_screen() -> Any:

from . import components as c

from .component import component

from .hooks import use_effect, use_state

@component

def ConnectScreen() -> Any:

client = current()

initial = client.url if client is not None else (saved_server_url() or "")

url, set_url = use_state(display_server_url(initial) if initial else "")

status, set_status = use_state(client.state if client is not None else "idle")

detail, set_detail = use_state("")

def _subscribe() -> Optional[Callable[[], None]]:

live = current()

if live is None:

return None

def _on_state(state: str, info: str) -> None:

from .runtime import call_on_application_thread

def _update() -> None:

set_status(state)

set_detail(info)

call_on_application_thread(_update)

return live.add_listener(_on_state)

use_effect(_subscribe, [client])

def _connect() -> None:

try:

normalized = normalize_server_url(url)

except ValueError as exc:

set_status("error")

set_detail(str(exc))

return

start(normalized)

set_status("connecting")

set_detail(urlsplit(normalized).netloc)

lan_hint = (

"Run `pn start` on your computer and enter the device URL it prints "

"(for example 192.168.1.20:8765/?token=...)."

)

colors: Dict[str, str] = {

"idle": "#8E8E93",

"connecting": "#FF9F0A",

"connected": "#30D158",

"syncing": "#0A84FF",

"disconnected": "#FF453A",

"error": "#FF453A",

}

return c.Column(

c.Column(

c.Text("PythonNative", style={"font_size": 30, "bold": True, "color": "#FFFFFF"}),

c.Text("Dev client", style={"font_size": 17, "color": "#8E8E93"}),

style={"gap": 4, "padding_top": 72},

c.Column(

c.Text("Dev server address", style={"font_size": 13, "color": "#8E8E93"}),

c.TextInput(

value=url,

on_change=set_url,

placeholder="192.168.1.20:8765/?token=...",

auto_correct=False,

auto_capitalize="none",

keyboard_type="url",

style={

"background_color": "#1C1C1E",

"color": "#FFFFFF",

"padding": 12,

"border_radius": 10,

"font_size": 16,

c.Button(

"Connect",

on_press=_connect,

style={"background_color": "#0A84FF", "color": "#FFFFFF", "padding": 12, "border_radius": 10},

style={"gap": 8, "align_items": "stretch"},

c.Column(

c.Row(

c.View(

style={

"width": 10,

"height": 10,

"border_radius": 5,

"background_color": colors.get(status, "#8E8E93"),

}

c.Text(status, style={"color": "#FFFFFF", "font_size": 15}),

style={"gap": 8, "align_items": "center"},

c.Text(detail, style={"color": "#8E8E93", "font_size": 12}),

style={"gap": 4},

c.Text(lan_hint, style={"color": "#636366", "font_size": 12}),

style={"flex": 1, "padding": 24, "gap": 28, "background_color": "#000000"},

)

return ConnectScreen

class _LazyConnectScreen:

"""Import-light proxy so ``from pythonnative.devclient import ConnectScreen`` stays cheap."""

_component: Any = None

def __call__(self, *args: Any, **kwargs: Any) -> Any:

if _LazyConnectScreen._component is None:

_LazyConnectScreen._component = _connect_screen()

return _LazyConnectScreen._component(*args, **kwargs)

def __getattr__(self, name: str) -> Any:

if _LazyConnectScreen._component is None:

_LazyConnectScreen._component = _connect_screen()

return getattr(_LazyConnectScreen._component, name)

ConnectScreen: Any = _LazyConnectScreen()

"""Root component of ``--dev-client`` builds until the first sync arrives."""

def placeholder_main_source() -> str:

"""Source of the ``app/main.py`` staged into ``--dev-client`` builds."""

return (

'"""Placeholder entry module for a PythonNative dev-client build.\n\n'

"The real app arrives from the dev server and shadows this file.\n"

'"""\n\n'

"from pythonnative.devclient import ConnectScreen as App\n\n"

'__all__ = ["App"]\n'

)

pythonnative/src/pythonnative/devclient.py at main · pythonnative/pythonnative · GitHub

Expand file tree

Breadcrumbs

devclient.py

Latest commit

History

Breadcrumbs

devclient.py

File metadata and controls