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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of dart.async; | |
| 6 | |
| 7 typedef R ZoneCallback<R>(); | |
| 8 typedef R ZoneUnaryCallback<R, T>(T arg); | |
| 9 typedef R ZoneBinaryCallback<R, T1, T2>(T1 arg1, T2 arg2); | |
| 10 | |
| 11 // TODO(floitsch): we are abusing generic typedefs as typedefs for generic | |
| 12 // functions. | |
| 13 /*ABUSE*/ | |
| 14 typedef R HandleUncaughtErrorHandler<R>( | |
| 15 Zone self, ZoneDelegate parent, Zone zone, error, StackTrace stackTrace); | |
| 16 /*ABUSE*/ | |
| 17 typedef R RunHandler<R>(Zone self, ZoneDelegate parent, Zone zone, R f()); | |
| 18 /*ABUSE*/ | |
| 19 typedef R RunUnaryHandler<R, T>( | |
| 20 Zone self, ZoneDelegate parent, Zone zone, R f(T arg), T arg); | |
| 21 /*ABUSE*/ | |
| 22 typedef R RunBinaryHandler<R, T1, T2>( | |
| 23 Zone self, ZoneDelegate parent, Zone zone, | |
| 24 R f(T1 arg1, T2 arg2), T1 arg1, T2 arg2); | |
| 25 /*ABUSE*/ | |
| 26 typedef ZoneCallback<R> RegisterCallbackHandler<R>( | |
| 27 Zone self, ZoneDelegate parent, Zone zone, R f()); | |
| 28 /*ABUSE*/ | |
| 29 typedef ZoneUnaryCallback<R, T> RegisterUnaryCallbackHandler<R, T>( | |
| 30 Zone self, ZoneDelegate parent, Zone zone, R f(T arg)); | |
| 31 /*ABUSE*/ | |
| 32 typedef ZoneBinaryCallback<R, T1, T2> RegisterBinaryCallbackHandler<R, T1, T2>( | |
| 33 Zone self, ZoneDelegate parent, Zone zone, R f(T1 arg1, T2 arg2)); | |
| 34 typedef AsyncError ErrorCallbackHandler(Zone self, ZoneDelegate parent, | |
| 35 Zone zone, Object error, StackTrace stackTrace); | |
| 36 typedef void ScheduleMicrotaskHandler( | |
| 37 Zone self, ZoneDelegate parent, Zone zone, void f()); | |
| 38 typedef Timer CreateTimerHandler( | |
| 39 Zone self, ZoneDelegate parent, Zone zone, Duration duration, void f()); | |
| 40 typedef Timer CreatePeriodicTimerHandler( | |
| 41 Zone self, ZoneDelegate parent, Zone zone, | |
| 42 Duration period, void f(Timer timer)); | |
| 43 typedef void PrintHandler( | |
| 44 Zone self, ZoneDelegate parent, Zone zone, String line); | |
| 45 typedef Zone ForkHandler(Zone self, ZoneDelegate parent, Zone zone, | |
| 46 ZoneSpecification specification, | |
| 47 Map zoneValues); | |
| 48 | |
| 49 /** Pair of error and stack trace. Returned by [Zone.errorCallback]. */ | |
| 50 class AsyncError implements Error { | |
| 51 final Object error; | |
| 52 final StackTrace stackTrace; | |
| 53 | |
| 54 AsyncError(this.error, this.stackTrace); | |
| 55 | |
| 56 String toString() => '$error'; | |
| 57 } | |
| 58 | |
| 59 | |
| 60 class _ZoneFunction<T extends Function> { | |
| 61 final _Zone zone; | |
| 62 final T function; | |
| 63 const _ZoneFunction(this.zone, this.function); | |
| 64 } | |
| 65 | |
| 66 /** | |
| 67 * This class provides the specification for a forked zone. | |
| 68 * | |
| 69 * When forking a new zone (see [Zone.fork]) one can override the default | |
| 70 * behavior of the zone by providing callbacks. These callbacks must be | |
| 71 * given in an instance of this class. | |
| 72 * | |
| 73 * Handlers have the same signature as the same-named methods on [Zone] but | |
| 74 * receive three additional arguments: | |
| 75 * | |
| 76 * 1. the zone the handlers are attached to (the "self" zone). | |
| 77 * 2. a [ZoneDelegate] to the parent zone. | |
| 78 * 3. the zone that first received the request (before the request was | |
| 79 * bubbled up). | |
| 80 * | |
| 81 * Handlers can either stop propagation the request (by simply not calling the | |
| 82 * parent handler), or forward to the parent zone, potentially modifying the | |
| 83 * arguments on the way. | |
| 84 */ | |
| 85 abstract class ZoneSpecification { | |
| 86 /** | |
| 87 * Creates a specification with the provided handlers. | |
| 88 */ | |
| 89 const factory ZoneSpecification({ | |
| 90 HandleUncaughtErrorHandler handleUncaughtError, | |
| 91 RunHandler run, | |
| 92 RunUnaryHandler runUnary, | |
| 93 RunBinaryHandler runBinary, | |
| 94 RegisterCallbackHandler registerCallback, | |
| 95 RegisterUnaryCallbackHandler registerUnaryCallback, | |
| 96 RegisterBinaryCallbackHandler registerBinaryCallback, | |
| 97 ErrorCallbackHandler errorCallback, | |
| 98 ScheduleMicrotaskHandler scheduleMicrotask, | |
| 99 CreateTimerHandler createTimer, | |
| 100 CreatePeriodicTimerHandler createPeriodicTimer, | |
| 101 PrintHandler print, | |
| 102 ForkHandler fork | |
| 103 }) = _ZoneSpecification; | |
| 104 | |
| 105 /** | |
| 106 * Creates a specification from [other] with the provided handlers overriding | |
| 107 * the ones in [other]. | |
| 108 */ | |
| 109 factory ZoneSpecification.from(ZoneSpecification other, { | |
| 110 HandleUncaughtErrorHandler handleUncaughtError: null, | |
| 111 RunHandler run: null, | |
| 112 RunUnaryHandler runUnary: null, | |
| 113 RunBinaryHandler runBinary: null, | |
| 114 RegisterCallbackHandler registerCallback: null, | |
| 115 RegisterUnaryCallbackHandler registerUnaryCallback: null, | |
| 116 RegisterBinaryCallbackHandler registerBinaryCallback: null, | |
| 117 ErrorCallbackHandler errorCallback: null, | |
| 118 ScheduleMicrotaskHandler scheduleMicrotask: null, | |
| 119 CreateTimerHandler createTimer: null, | |
| 120 CreatePeriodicTimerHandler createPeriodicTimer: null, | |
| 121 PrintHandler print: null, | |
| 122 ForkHandler fork: null | |
| 123 }) { | |
| 124 return new ZoneSpecification( | |
| 125 handleUncaughtError: handleUncaughtError ?? other.handleUncaughtError, | |
| 126 run: run ?? other.run, | |
| 127 runUnary: runUnary ?? other.runUnary, | |
| 128 runBinary: runBinary ?? other.runBinary, | |
| 129 registerCallback: registerCallback ?? other.registerCallback, | |
| 130 registerUnaryCallback: registerUnaryCallback ?? | |
| 131 other.registerUnaryCallback, | |
| 132 registerBinaryCallback: registerBinaryCallback ?? | |
| 133 other.registerBinaryCallback, | |
| 134 errorCallback: errorCallback ?? other.errorCallback, | |
| 135 scheduleMicrotask: scheduleMicrotask ?? other.scheduleMicrotask, | |
| 136 createTimer : createTimer ?? other.createTimer, | |
| 137 createPeriodicTimer: createPeriodicTimer ?? other.createPeriodicTimer, | |
| 138 print : print ?? other.print, | |
| 139 fork: fork ?? other.fork); | |
| 140 } | |
| 141 | |
| 142 HandleUncaughtErrorHandler get handleUncaughtError; | |
| 143 RunHandler get run; | |
| 144 RunUnaryHandler get runUnary; | |
| 145 RunBinaryHandler get runBinary; | |
| 146 RegisterCallbackHandler get registerCallback; | |
| 147 RegisterUnaryCallbackHandler get registerUnaryCallback; | |
| 148 RegisterBinaryCallbackHandler get registerBinaryCallback; | |
| 149 ErrorCallbackHandler get errorCallback; | |
| 150 ScheduleMicrotaskHandler get scheduleMicrotask; | |
| 151 CreateTimerHandler get createTimer; | |
| 152 CreatePeriodicTimerHandler get createPeriodicTimer; | |
| 153 PrintHandler get print; | |
| 154 ForkHandler get fork; | |
| 155 } | |
| 156 | |
| 157 /** | |
| 158 * Internal [ZoneSpecification] class. | |
| 159 * | |
| 160 * The implementation wants to rely on the fact that the getters cannot change | |
| 161 * dynamically. We thus require users to go through the redirecting | |
| 162 * [ZoneSpecification] constructor which instantiates this class. | |
| 163 */ | |
| 164 class _ZoneSpecification implements ZoneSpecification { | |
| 165 const _ZoneSpecification({ | |
| 166 this.handleUncaughtError: null, | |
| 167 this.run: null, | |
| 168 this.runUnary: null, | |
| 169 this.runBinary: null, | |
| 170 this.registerCallback: null, | |
| 171 this.registerUnaryCallback: null, | |
| 172 this.registerBinaryCallback: null, | |
| 173 this.errorCallback: null, | |
| 174 this.scheduleMicrotask: null, | |
| 175 this.createTimer: null, | |
| 176 this.createPeriodicTimer: null, | |
| 177 this.print: null, | |
| 178 this.fork: null | |
| 179 }); | |
| 180 | |
| 181 final HandleUncaughtErrorHandler handleUncaughtError; | |
| 182 final RunHandler run; | |
| 183 final RunUnaryHandler runUnary; | |
| 184 final RunBinaryHandler runBinary; | |
| 185 final RegisterCallbackHandler registerCallback; | |
| 186 final RegisterUnaryCallbackHandler registerUnaryCallback; | |
| 187 final RegisterBinaryCallbackHandler registerBinaryCallback; | |
| 188 final ErrorCallbackHandler errorCallback; | |
| 189 final ScheduleMicrotaskHandler scheduleMicrotask; | |
| 190 final CreateTimerHandler createTimer; | |
| 191 final CreatePeriodicTimerHandler createPeriodicTimer; | |
| 192 final PrintHandler print; | |
| 193 final ForkHandler fork; | |
| 194 } | |
| 195 | |
| 196 /** | |
| 197 * This class wraps zones for delegation. | |
| 198 * | |
| 199 * When forwarding to parent zones one can't just invoke the parent zone's | |
| 200 * exposed functions (like [Zone.run]), but one needs to provide more | |
| 201 * information (like the zone the `run` was initiated). Zone callbacks thus | |
| 202 * receive more information including this [ZoneDelegate] class. When delegating | |
| 203 * to the parent zone one should go through the given instance instead of | |
| 204 * directly invoking the parent zone. | |
| 205 */ | |
| 206 abstract class ZoneDelegate { | |
| 207 /*=R*/ handleUncaughtError/*<R>*/( | |
| 208 Zone zone, error, StackTrace stackTrace); | |
| 209 /*=R*/ run/*<R>*/(Zone zone, /*=R*/ f()); | |
| 210 /*=R*/ runUnary/*<R, T>*/(Zone zone, /*=R*/ f(/*=T*/ arg), /*=T*/ arg); | |
| 211 /*=R*/ runBinary/*<R, T1, T2>*/(Zone zone, | |
| 212 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2); | |
| 213 ZoneCallback/*<R>*/ registerCallback/*<R>*/(Zone zone, /*=R*/ f()); | |
| 214 ZoneUnaryCallback/*<R, T>*/ registerUnaryCallback/*<R, T>*/( | |
| 215 Zone zone, /*=R*/ f(/*=T*/ arg)); | |
| 216 ZoneBinaryCallback/*<R, T1, T2>*/ registerBinaryCallback/*<R, T1, T2>*/( | |
| 217 Zone zone, /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2)); | |
| 218 AsyncError errorCallback(Zone zone, Object error, StackTrace stackTrace); | |
| 219 void scheduleMicrotask(Zone zone, void f()); | |
| 220 Timer createTimer(Zone zone, Duration duration, void f()); | |
| 221 Timer createPeriodicTimer(Zone zone, Duration period, void f(Timer timer)); | |
| 222 void print(Zone zone, String line); | |
| 223 Zone fork(Zone zone, ZoneSpecification specification, Map zoneValues); | |
| 224 } | |
| 225 | |
| 226 /** | |
| 227 * A Zone represents the asynchronous version of a dynamic extent. Asynchronous | |
| 228 * callbacks are executed in the zone they have been queued in. For example, | |
| 229 * the callback of a `future.then` is executed in the same zone as the one where | |
| 230 * the `then` was invoked. | |
| 231 */ | |
| 232 abstract class Zone { | |
| 233 // Private constructor so that it is not possible instantiate a Zone class. | |
| 234 Zone._(); | |
| 235 | |
| 236 /** The root zone that is implicitly created. */ | |
| 237 static const Zone ROOT = _ROOT_ZONE; | |
| 238 | |
| 239 /** The currently running zone. */ | |
| 240 static Zone _current = _ROOT_ZONE; | |
| 241 | |
| 242 static Zone get current => _current; | |
| 243 | |
| 244 /*=R*/ handleUncaughtError/*<R>*/(error, StackTrace stackTrace); | |
| 245 | |
| 246 /** | |
| 247 * Returns the parent zone. | |
| 248 * | |
| 249 * Returns `null` if `this` is the [ROOT] zone. | |
| 250 */ | |
| 251 Zone get parent; | |
| 252 | |
| 253 /** | |
| 254 * The error zone is the one that is responsible for dealing with uncaught | |
| 255 * errors. | |
| 256 * Errors are not allowed to cross between zones with different error-zones. | |
| 257 * | |
| 258 * This is the closest parent or ancestor zone of this zone that has a custom | |
| 259 * [handleUncaughtError] method. | |
| 260 */ | |
| 261 Zone get errorZone; | |
| 262 | |
| 263 /** | |
| 264 * Returns true if `this` and [otherZone] are in the same error zone. | |
| 265 * | |
| 266 * Two zones are in the same error zone if they inherit their | |
| 267 * [handleUncaughtError] callback from the same [errorZone]. | |
| 268 */ | |
| 269 bool inSameErrorZone(Zone otherZone); | |
| 270 | |
| 271 /** | |
| 272 * Creates a new zone as a child of `this`. | |
| 273 * | |
| 274 * The new zone will have behavior like the current zone, except where | |
| 275 * overridden by functions in [specification]. | |
| 276 * | |
| 277 * The new zone will have the same stored values (accessed through | |
| 278 * `operator []`) as this zone, but updated with the keys and values | |
| 279 * in [zoneValues]. If a key is in both this zone's values and in | |
| 280 * `zoneValues`, the new zone will use the value from `zoneValues``. | |
| 281 */ | |
| 282 Zone fork({ ZoneSpecification specification, | |
| 283 Map zoneValues }); | |
| 284 | |
| 285 /** | |
| 286 * Executes the given function [f] in this zone. | |
| 287 */ | |
| 288 /*=R*/ run/*<R>*/(/*=R*/ f()); | |
| 289 | |
| 290 /** | |
| 291 * Executes the given callback [f] with argument [arg] in this zone. | |
| 292 */ | |
| 293 /*=R*/ runUnary/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg); | |
| 294 | |
| 295 /** | |
| 296 * Executes the given callback [f] with argument [arg1] and [arg2] in this | |
| 297 * zone. | |
| 298 */ | |
| 299 /*=R*/ runBinary/*<R, T1, T2>*/( | |
| 300 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2); | |
| 301 | |
| 302 /** | |
| 303 * Executes the given function [f] in this zone. | |
| 304 * | |
| 305 * Same as [run] but catches uncaught errors and gives them to | |
| 306 * [handleUncaughtError]. | |
| 307 */ | |
| 308 /*=R*/ runGuarded/*<R>*/(/*=R*/ f()); | |
| 309 | |
| 310 /** | |
| 311 * Executes the given callback [f] in this zone. | |
| 312 * | |
| 313 * Same as [runUnary] but catches uncaught errors and gives them to | |
| 314 * [handleUncaughtError]. | |
| 315 */ | |
| 316 /*=R*/ runUnaryGuarded/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg); | |
| 317 | |
| 318 /** | |
| 319 * Executes the given callback [f] in this zone. | |
| 320 * | |
| 321 * Same as [runBinary] but catches uncaught errors and gives them to | |
| 322 * [handleUncaughtError]. | |
| 323 */ | |
| 324 /*=R*/ runBinaryGuarded/*<R, T1, T2>*/( | |
| 325 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2); | |
| 326 | |
| 327 /** | |
| 328 * Registers the given callback in this zone. | |
| 329 * | |
| 330 * It is good practice to register asynchronous or delayed callbacks before | |
| 331 * invoking [run]. This gives the zone a chance to wrap the callback and | |
| 332 * to store information with the callback. For example, a zone may decide | |
| 333 * to store the stack trace (at the time of the registration) with the | |
| 334 * callback. | |
| 335 * | |
| 336 * Returns a potentially new callback that should be used in place of the | |
| 337 * given [callback]. | |
| 338 */ | |
| 339 ZoneCallback/*<R>*/ registerCallback/*<R>*/(/*=R*/ callback()); | |
| 340 | |
| 341 /** | |
| 342 * Registers the given callback in this zone. | |
| 343 * | |
| 344 * Similar to [registerCallback] but with a unary callback. | |
| 345 */ | |
| 346 ZoneUnaryCallback/*<R, T>*/ registerUnaryCallback/*<R, T>*/( | |
| 347 /*=R*/ callback(/*=T*/ arg)); | |
| 348 | |
| 349 /** | |
| 350 * Registers the given callback in this zone. | |
| 351 * | |
| 352 * Similar to [registerCallback] but with a unary callback. | |
| 353 */ | |
| 354 ZoneBinaryCallback/*<R, T1, T2>*/ registerBinaryCallback/*<R, T1, T2>*/( | |
| 355 /*=R*/ callback(/*=T1*/ arg1, /*=T2*/ arg2)); | |
| 356 | |
| 357 /** | |
| 358 * Equivalent to: | |
| 359 * | |
| 360 * ZoneCallback registered = registerCallback(f); | |
| 361 * if (runGuarded) return () => this.runGuarded(registered); | |
| 362 * return () => this.run(registered); | |
| 363 * | |
| 364 */ | |
| 365 ZoneCallback/*<R>*/ bindCallback/*<R>*/( | |
| 366 /*=R*/ f(), { bool runGuarded: true }); | |
| 367 | |
| 368 /** | |
| 369 * Equivalent to: | |
| 370 * | |
| 371 * ZoneCallback registered = registerUnaryCallback(f); | |
| 372 * if (runGuarded) return (arg) => this.runUnaryGuarded(registered, arg); | |
| 373 * return (arg) => thin.runUnary(registered, arg); | |
| 374 */ | |
| 375 ZoneUnaryCallback/*<R, T>*/ bindUnaryCallback/*<R, T>*/( | |
| 376 /*=R*/ f(/*=T*/ arg), { bool runGuarded: true }); | |
| 377 | |
| 378 /** | |
| 379 * Equivalent to: | |
| 380 * | |
| 381 * ZoneCallback registered = registerBinaryCallback(f); | |
| 382 * if (runGuarded) { | |
| 383 * return (arg1, arg2) => this.runBinaryGuarded(registered, arg); | |
| 384 * } | |
| 385 * return (arg1, arg2) => thin.runBinary(registered, arg1, arg2); | |
| 386 */ | |
| 387 ZoneBinaryCallback/*<R, T1, T2>*/ bindBinaryCallback/*<R, T1, T2>*/( | |
| 388 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), { bool runGuarded: true }); | |
| 389 | |
| 390 /** | |
| 391 * Intercepts errors when added programmatically to a `Future` or `Stream`. | |
| 392 * | |
| 393 * When caling [Completer.completeError], [Stream.addError], | |
| 394 * or [Future] constructors that take an error or a callback that may throw, | |
| 395 * the current zone is allowed to intercept and replace the error. | |
| 396 * | |
| 397 * When other libraries use intermediate controllers or completers, such | |
| 398 * calls may contain errors that have already been processed. | |
| 399 * | |
| 400 * Return `null` if no replacement is desired. | |
| 401 * The original error is used unchanged in that case. | |
| 402 * Otherwise return an instance of [AsyncError] holding | |
| 403 * the new pair of error and stack trace. | |
| 404 * If the [AsyncError.error] is `null`, it is replaced by a [NullThrownError]. | |
| 405 */ | |
| 406 AsyncError errorCallback(Object error, StackTrace stackTrace); | |
| 407 | |
| 408 /** | |
| 409 * Runs [f] asynchronously in this zone. | |
| 410 */ | |
| 411 void scheduleMicrotask(void f()); | |
| 412 | |
| 413 /** | |
| 414 * Creates a Timer where the callback is executed in this zone. | |
| 415 */ | |
| 416 Timer createTimer(Duration duration, void callback()); | |
| 417 | |
| 418 /** | |
| 419 * Creates a periodic Timer where the callback is executed in this zone. | |
| 420 */ | |
| 421 Timer createPeriodicTimer(Duration period, void callback(Timer timer)); | |
| 422 | |
| 423 /** | |
| 424 * Prints the given [line]. | |
| 425 */ | |
| 426 void print(String line); | |
| 427 | |
| 428 /** | |
| 429 * Call to enter the Zone. | |
| 430 * | |
| 431 * The previous current zone is returned. | |
| 432 */ | |
| 433 static Zone _enter(Zone zone) { | |
| 434 assert(zone != null); | |
| 435 assert(!identical(zone, _current)); | |
| 436 Zone previous = _current; | |
| 437 _current = zone; | |
| 438 return previous; | |
| 439 } | |
| 440 | |
| 441 /** | |
| 442 * Call to leave the Zone. | |
| 443 * | |
| 444 * The previous Zone must be provided as `previous`. | |
| 445 */ | |
| 446 static void _leave(Zone previous) { | |
| 447 assert(previous != null); | |
| 448 Zone._current = previous; | |
| 449 } | |
| 450 | |
| 451 /** | |
| 452 * Retrieves the zone-value associated with [key]. | |
| 453 * | |
| 454 * If this zone does not contain the value looks up the same key in the | |
| 455 * parent zone. If the [key] is not found returns `null`. | |
| 456 * | |
| 457 * Any object can be used as key, as long as it has compatible `operator ==` | |
| 458 * and `hashCode` implementations. | |
| 459 * By controlling access to the key, a zone can grant or deny access to the | |
| 460 * zone value. | |
| 461 */ | |
| 462 operator [](Object key); | |
| 463 } | |
| 464 | |
| 465 ZoneDelegate _parentDelegate(_Zone zone) { | |
| 466 if (zone.parent == null) return null; | |
| 467 return zone.parent._delegate; | |
| 468 } | |
| 469 | |
| 470 class _ZoneDelegate implements ZoneDelegate { | |
| 471 final _Zone _delegationTarget; | |
| 472 | |
| 473 _ZoneDelegate(this._delegationTarget); | |
| 474 | |
| 475 /*=R*/ handleUncaughtError/*<R>*/( | |
| 476 Zone zone, error, StackTrace stackTrace) { | |
| 477 var implementation = _delegationTarget._handleUncaughtError; | |
| 478 _Zone implZone = implementation.zone; | |
| 479 HandleUncaughtErrorHandler handler = implementation.function; | |
| 480 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 481 // supported. Remove the unnecessary cast. | |
| 482 return handler( | |
| 483 implZone, _parentDelegate(implZone), zone, error, stackTrace) | |
| 484 as Object/*=R*/; | |
| 485 } | |
| 486 | |
| 487 /*=R*/ run/*<R>*/(Zone zone, /*=R*/ f()) { | |
| 488 var implementation = _delegationTarget._run; | |
| 489 _Zone implZone = implementation.zone; | |
| 490 RunHandler handler = implementation.function; | |
| 491 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 492 // supported. Remove the unnecessary cast. | |
| 493 return handler(implZone, _parentDelegate(implZone), zone, f) | |
| 494 as Object/*=R*/; | |
| 495 } | |
| 496 | |
| 497 /*=R*/ runUnary/*<R, T>*/(Zone zone, /*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 498 var implementation = _delegationTarget._runUnary; | |
| 499 _Zone implZone = implementation.zone; | |
| 500 RunUnaryHandler handler = implementation.function; | |
| 501 // TODO(floitsch): make this a generic method call on '<R, T>' once it's | |
| 502 // supported. Remove the unnecessary cast. | |
| 503 return handler( | |
| 504 implZone, _parentDelegate(implZone), zone, f, arg) as Object/*=R*/; | |
| 505 } | |
| 506 | |
| 507 /*=R*/ runBinary/*<R, T1, T2>*/(Zone zone, | |
| 508 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 509 var implementation = _delegationTarget._runBinary; | |
| 510 _Zone implZone = implementation.zone; | |
| 511 RunBinaryHandler handler = implementation.function; | |
| 512 // TODO(floitsch): make this a generic method call on '<R, T1, T2>' once | |
| 513 // it's supported. Remove the unnecessary cast. | |
| 514 return handler( | |
| 515 implZone, _parentDelegate(implZone), zone, f, arg1, arg2) | |
| 516 as Object/*=R*/; | |
| 517 } | |
| 518 | |
| 519 ZoneCallback/*<R>*/ registerCallback/*<R>*/(Zone zone, /*=R*/ f()) { | |
| 520 var implementation = _delegationTarget._registerCallback; | |
| 521 _Zone implZone = implementation.zone; | |
| 522 RegisterCallbackHandler handler = implementation.function; | |
| 523 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 524 // supported. Remove the unnecessary cast. | |
| 525 return handler(implZone, _parentDelegate(implZone), zone, f) | |
| 526 as Object/*=ZoneCallback<R>*/; | |
| 527 } | |
| 528 | |
| 529 ZoneUnaryCallback/*<R, T>*/ registerUnaryCallback/*<R, T>*/( | |
| 530 Zone zone, /*=R*/ f(/*=T*/ arg)) { | |
| 531 var implementation = _delegationTarget._registerUnaryCallback; | |
| 532 _Zone implZone = implementation.zone; | |
| 533 RegisterUnaryCallbackHandler handler = implementation.function; | |
| 534 // TODO(floitsch): make this a generic method call on '<R, T>' once it's | |
| 535 // supported. Remove the unnecessary cast. | |
| 536 return handler(implZone, _parentDelegate(implZone), zone, f) | |
| 537 as Object/*=ZoneUnaryCallback<R, T>*/; | |
| 538 } | |
| 539 | |
| 540 ZoneBinaryCallback/*<R, T1, T2>*/ registerBinaryCallback/*<R, T1, T2>*/( | |
| 541 Zone zone, /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2)) { | |
| 542 var implementation = _delegationTarget._registerBinaryCallback; | |
| 543 _Zone implZone = implementation.zone; | |
| 544 RegisterBinaryCallbackHandler handler = implementation.function; | |
| 545 // TODO(floitsch): make this a generic method call on '<R, T1, T2>' once | |
| 546 // it's supported. Remove the unnecessary cast. | |
| 547 return handler(implZone, _parentDelegate(implZone), zone, f) | |
| 548 as Object/*=ZoneBinaryCallback<R, T1, T2>*/; | |
| 549 } | |
| 550 | |
| 551 AsyncError errorCallback(Zone zone, Object error, StackTrace stackTrace) { | |
| 552 var implementation = _delegationTarget._errorCallback; | |
| 553 _Zone implZone = implementation.zone; | |
| 554 if (identical(implZone, _ROOT_ZONE)) return null; | |
| 555 ErrorCallbackHandler handler = implementation.function; | |
| 556 return handler(implZone, _parentDelegate(implZone), zone, | |
| 557 error, stackTrace); | |
| 558 } | |
| 559 | |
| 560 void scheduleMicrotask(Zone zone, f()) { | |
| 561 var implementation = _delegationTarget._scheduleMicrotask; | |
| 562 _Zone implZone = implementation.zone; | |
| 563 ScheduleMicrotaskHandler handler = implementation.function; | |
| 564 handler(implZone, _parentDelegate(implZone), zone, f); | |
| 565 } | |
| 566 | |
| 567 Timer createTimer(Zone zone, Duration duration, void f()) { | |
| 568 var implementation = _delegationTarget._createTimer; | |
| 569 _Zone implZone = implementation.zone; | |
| 570 CreateTimerHandler handler = implementation.function; | |
| 571 return handler(implZone, _parentDelegate(implZone), zone, duration, f); | |
| 572 } | |
| 573 | |
| 574 Timer createPeriodicTimer(Zone zone, Duration period, void f(Timer timer)) { | |
| 575 var implementation = _delegationTarget._createPeriodicTimer; | |
| 576 _Zone implZone = implementation.zone; | |
| 577 CreatePeriodicTimerHandler handler = implementation.function; | |
| 578 return handler(implZone, _parentDelegate(implZone), zone, period, f); | |
| 579 } | |
| 580 | |
| 581 void print(Zone zone, String line) { | |
| 582 var implementation = _delegationTarget._print; | |
| 583 _Zone implZone = implementation.zone; | |
| 584 PrintHandler handler = implementation.function; | |
| 585 handler(implZone, _parentDelegate(implZone), zone, line); | |
| 586 } | |
| 587 | |
| 588 Zone fork(Zone zone, ZoneSpecification specification, | |
| 589 Map zoneValues) { | |
| 590 var implementation = _delegationTarget._fork; | |
| 591 _Zone implZone = implementation.zone; | |
| 592 ForkHandler handler = implementation.function; | |
| 593 return handler( | |
| 594 implZone, _parentDelegate(implZone), zone, specification, zoneValues); | |
| 595 } | |
| 596 } | |
| 597 | |
| 598 | |
| 599 /** | |
| 600 * Base class for Zone implementations. | |
| 601 */ | |
| 602 abstract class _Zone implements Zone { | |
| 603 const _Zone(); | |
| 604 | |
| 605 _ZoneFunction<RunHandler> get _run; | |
| 606 _ZoneFunction<RunUnaryHandler> get _runUnary; | |
| 607 _ZoneFunction<RunBinaryHandler> get _runBinary; | |
| 608 _ZoneFunction<RegisterCallbackHandler> get _registerCallback; | |
| 609 _ZoneFunction<RegisterUnaryCallbackHandler> get _registerUnaryCallback; | |
| 610 _ZoneFunction<RegisterBinaryCallbackHandler> get _registerBinaryCallback; | |
| 611 _ZoneFunction<ErrorCallbackHandler> get _errorCallback; | |
| 612 _ZoneFunction<ScheduleMicrotaskHandler> get _scheduleMicrotask; | |
| 613 _ZoneFunction<CreateTimerHandler> get _createTimer; | |
| 614 _ZoneFunction<CreatePeriodicTimerHandler> get _createPeriodicTimer; | |
| 615 _ZoneFunction<PrintHandler> get _print; | |
| 616 _ZoneFunction<ForkHandler> get _fork; | |
| 617 _ZoneFunction<HandleUncaughtErrorHandler> get _handleUncaughtError; | |
| 618 _Zone get parent; | |
| 619 ZoneDelegate get _delegate; | |
| 620 Map get _map; | |
| 621 | |
| 622 bool inSameErrorZone(Zone otherZone) { | |
| 623 return identical(this, otherZone) || | |
| 624 identical(errorZone, otherZone.errorZone); | |
| 625 } | |
| 626 } | |
| 627 | |
| 628 class _CustomZone extends _Zone { | |
| 629 // The actual zone and implementation of each of these | |
| 630 // inheritable zone functions. | |
| 631 _ZoneFunction<RunHandler> _run; | |
| 632 _ZoneFunction<RunUnaryHandler> _runUnary; | |
| 633 _ZoneFunction<RunBinaryHandler> _runBinary; | |
| 634 _ZoneFunction<RegisterCallbackHandler> _registerCallback; | |
| 635 _ZoneFunction<RegisterUnaryCallbackHandler> _registerUnaryCallback; | |
| 636 _ZoneFunction<RegisterBinaryCallbackHandler> _registerBinaryCallback; | |
| 637 _ZoneFunction<ErrorCallbackHandler> _errorCallback; | |
| 638 _ZoneFunction<ScheduleMicrotaskHandler> _scheduleMicrotask; | |
| 639 _ZoneFunction<CreateTimerHandler> _createTimer; | |
| 640 _ZoneFunction<CreatePeriodicTimerHandler> _createPeriodicTimer; | |
| 641 _ZoneFunction<PrintHandler> _print; | |
| 642 _ZoneFunction<ForkHandler> _fork; | |
| 643 _ZoneFunction<HandleUncaughtErrorHandler> _handleUncaughtError; | |
| 644 | |
| 645 // A cached delegate to this zone. | |
| 646 ZoneDelegate _delegateCache; | |
| 647 | |
| 648 /// The parent zone. | |
| 649 final _Zone parent; | |
| 650 | |
| 651 /// The zone's scoped value declaration map. | |
| 652 /// | |
| 653 /// This is always a [HashMap]. | |
| 654 final Map _map; | |
| 655 | |
| 656 ZoneDelegate get _delegate { | |
| 657 if (_delegateCache != null) return _delegateCache; | |
| 658 _delegateCache = new _ZoneDelegate(this); | |
| 659 return _delegateCache; | |
| 660 } | |
| 661 | |
| 662 _CustomZone(this.parent, ZoneSpecification specification, this._map) { | |
| 663 // The root zone will have implementations of all parts of the | |
| 664 // specification, so it will never try to access the (null) parent. | |
| 665 // All other zones have a non-null parent. | |
| 666 _run = (specification.run != null) | |
| 667 ? new _ZoneFunction<RunHandler>(this, specification.run) | |
| 668 : parent._run; | |
| 669 _runUnary = (specification.runUnary != null) | |
| 670 ? new _ZoneFunction<RunUnaryHandler>(this, specification.runUnary) | |
| 671 : parent._runUnary; | |
| 672 _runBinary = (specification.runBinary != null) | |
| 673 ? new _ZoneFunction<RunBinaryHandler>(this, specification.runBinary) | |
| 674 : parent._runBinary; | |
| 675 _registerCallback = (specification.registerCallback != null) | |
| 676 ? new _ZoneFunction<RegisterCallbackHandler>( | |
| 677 this, specification.registerCallback) | |
| 678 : parent._registerCallback; | |
| 679 _registerUnaryCallback = (specification.registerUnaryCallback != null) | |
| 680 ? new _ZoneFunction<RegisterUnaryCallbackHandler>( | |
| 681 this, specification.registerUnaryCallback) | |
| 682 : parent._registerUnaryCallback; | |
| 683 _registerBinaryCallback = (specification.registerBinaryCallback != null) | |
| 684 ? new _ZoneFunction<RegisterBinaryCallbackHandler>( | |
| 685 this, specification.registerBinaryCallback) | |
| 686 : parent._registerBinaryCallback; | |
| 687 _errorCallback = (specification.errorCallback != null) | |
| 688 ? new _ZoneFunction<ErrorCallbackHandler>( | |
| 689 this, specification.errorCallback) | |
| 690 : parent._errorCallback; | |
| 691 _scheduleMicrotask = (specification.scheduleMicrotask != null) | |
| 692 ? new _ZoneFunction<ScheduleMicrotaskHandler>( | |
| 693 this, specification.scheduleMicrotask) | |
| 694 : parent._scheduleMicrotask; | |
| 695 _createTimer = (specification.createTimer != null) | |
| 696 ? new _ZoneFunction<CreateTimerHandler>(this, specification.createTimer) | |
| 697 : parent._createTimer; | |
| 698 _createPeriodicTimer = (specification.createPeriodicTimer != null) | |
| 699 ? new _ZoneFunction<CreatePeriodicTimerHandler>( | |
| 700 this, specification.createPeriodicTimer) | |
| 701 : parent._createPeriodicTimer; | |
| 702 _print = (specification.print != null) | |
| 703 ? new _ZoneFunction<PrintHandler>(this, specification.print) | |
| 704 : parent._print; | |
| 705 _fork = (specification.fork != null) | |
| 706 ? new _ZoneFunction<ForkHandler>(this, specification.fork) | |
| 707 : parent._fork; | |
| 708 _handleUncaughtError = (specification.handleUncaughtError != null) | |
| 709 ? new _ZoneFunction<HandleUncaughtErrorHandler>( | |
| 710 this, specification.handleUncaughtError) | |
| 711 : parent._handleUncaughtError; | |
| 712 } | |
| 713 | |
| 714 /** | |
| 715 * The closest error-handling zone. | |
| 716 * | |
| 717 * Returns `this` if `this` has an error-handler. Otherwise returns the | |
| 718 * parent's error-zone. | |
| 719 */ | |
| 720 Zone get errorZone => _handleUncaughtError.zone; | |
| 721 | |
| 722 /*=R*/ runGuarded/*<R>*/(/*=R*/ f()) { | |
| 723 try { | |
| 724 return run(f); | |
| 725 } catch (e, s) { | |
| 726 return handleUncaughtError(e, s); | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 /*=R*/ runUnaryGuarded/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 731 try { | |
| 732 return runUnary(f, arg); | |
| 733 } catch (e, s) { | |
| 734 return handleUncaughtError(e, s); | |
| 735 } | |
| 736 } | |
| 737 | |
| 738 /*=R*/ runBinaryGuarded/*<R, T1, T2>*/( | |
| 739 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 740 try { | |
| 741 return runBinary(f, arg1, arg2); | |
| 742 } catch (e, s) { | |
| 743 return handleUncaughtError(e, s); | |
| 744 } | |
| 745 } | |
| 746 | |
| 747 ZoneCallback/*<R>*/ bindCallback/*<R>*/( | |
| 748 /*=R*/ f(), { bool runGuarded: true }) { | |
| 749 var registered = registerCallback(f); | |
| 750 if (runGuarded) { | |
| 751 return () => this.runGuarded(registered); | |
| 752 } else { | |
| 753 return () => this.run(registered); | |
| 754 } | |
| 755 } | |
| 756 | |
| 757 ZoneUnaryCallback/*<R, T>*/ bindUnaryCallback/*<R, T>*/( | |
| 758 /*=R*/ f(/*=T*/ arg), { bool runGuarded: true }) { | |
| 759 var registered = registerUnaryCallback(f); | |
| 760 if (runGuarded) { | |
| 761 return (arg) => this.runUnaryGuarded(registered, arg); | |
| 762 } else { | |
| 763 return (arg) => this.runUnary(registered, arg); | |
| 764 } | |
| 765 } | |
| 766 | |
| 767 ZoneBinaryCallback/*<R, T1, T2>*/ bindBinaryCallback/*<R, T1, T2>*/( | |
| 768 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), { bool runGuarded: true }) { | |
| 769 var registered = registerBinaryCallback(f); | |
| 770 if (runGuarded) { | |
| 771 return (arg1, arg2) => this.runBinaryGuarded(registered, arg1, arg2); | |
| 772 } else { | |
| 773 return (arg1, arg2) => this.runBinary(registered, arg1, arg2); | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 operator [](Object key) { | |
| 778 var result = _map[key]; | |
| 779 if (result != null || _map.containsKey(key)) return result; | |
| 780 // If we are not the root zone, look up in the parent zone. | |
| 781 if (parent != null) { | |
| 782 // We do not optimize for repeatedly looking up a key which isn't | |
| 783 // there. That would require storing the key and keeping it alive. | |
| 784 // Copying the key/value from the parent does not keep any new values | |
| 785 // alive. | |
| 786 var value = parent[key]; | |
| 787 if (value != null) { | |
| 788 _map[key] = value; | |
| 789 } | |
| 790 return value; | |
| 791 } | |
| 792 assert(this == _ROOT_ZONE); | |
| 793 return null; | |
| 794 } | |
| 795 | |
| 796 // Methods that can be customized by the zone specification. | |
| 797 | |
| 798 /*=R*/ handleUncaughtError/*<R>*/(error, StackTrace stackTrace) { | |
| 799 var implementation = this._handleUncaughtError; | |
| 800 assert(implementation != null); | |
| 801 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 802 HandleUncaughtErrorHandler handler = implementation.function; | |
| 803 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 804 // supported. Remove the unnecessary cast. | |
| 805 return handler( | |
| 806 implementation.zone, parentDelegate, this, error, stackTrace) | |
| 807 as Object/*=R*/; | |
| 808 } | |
| 809 | |
| 810 Zone fork({ZoneSpecification specification, Map zoneValues}) { | |
| 811 var implementation = this._fork; | |
| 812 assert(implementation != null); | |
| 813 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 814 ForkHandler handler = implementation.function; | |
| 815 return handler(implementation.zone, parentDelegate, this, | |
| 816 specification, zoneValues); | |
| 817 } | |
| 818 | |
| 819 /*=R*/ run/*<R>*/(/*=R*/ f()) { | |
| 820 var implementation = this._run; | |
| 821 assert(implementation != null); | |
| 822 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 823 RunHandler handler = implementation.function; | |
| 824 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 825 // supported. Remove the unnecessary cast. | |
| 826 return handler(implementation.zone, parentDelegate, this, f) | |
| 827 as Object/*=R*/; | |
| 828 } | |
| 829 | |
| 830 /*=R*/ runUnary/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 831 var implementation = this._runUnary; | |
| 832 assert(implementation != null); | |
| 833 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 834 RunUnaryHandler handler = implementation.function; | |
| 835 // TODO(floitsch): make this a generic method call on '<R, T>' once it's | |
| 836 // supported. Remove the unnecessary cast. | |
| 837 return handler(implementation.zone, parentDelegate, this, f, arg) | |
| 838 as Object/*=R*/; | |
| 839 } | |
| 840 | |
| 841 /*=R*/ runBinary/*<R, T1, T2>*/( | |
| 842 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 843 var implementation = this._runBinary; | |
| 844 assert(implementation != null); | |
| 845 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 846 RunBinaryHandler handler = implementation.function; | |
| 847 // TODO(floitsch): make this a generic method call on '<R, T1, T2>' once | |
| 848 // it's supported. Remove the unnecessary cast. | |
| 849 return handler( | |
| 850 implementation.zone, parentDelegate, this, f, arg1, arg2) | |
| 851 as Object/*=R*/; | |
| 852 } | |
| 853 | |
| 854 ZoneCallback/*<R>*/ registerCallback/*<R>*/(/*=R*/ callback()) { | |
| 855 var implementation = this._registerCallback; | |
| 856 assert(implementation != null); | |
| 857 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 858 RegisterCallbackHandler handler = implementation.function; | |
| 859 // TODO(floitsch): make this a generic method call on '<R>' once it's | |
| 860 // supported. Remove the unnecessary cast. | |
| 861 return handler(implementation.zone, parentDelegate, this, callback) | |
| 862 as Object/*=ZoneCallback<R>*/; | |
| 863 } | |
| 864 | |
| 865 ZoneUnaryCallback/*<R, T>*/ registerUnaryCallback/*<R, T>*/( | |
| 866 /*=R*/ callback(/*=T*/ arg)) { | |
| 867 var implementation = this._registerUnaryCallback; | |
| 868 assert(implementation != null); | |
| 869 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 870 RegisterUnaryCallbackHandler handler = implementation.function; | |
| 871 // TODO(floitsch): make this a generic method call on '<R, T>' once it's | |
| 872 // supported. Remove the unnecessary cast. | |
| 873 return handler(implementation.zone, parentDelegate, this, callback) | |
| 874 as Object/*=ZoneUnaryCallback<R, T>*/; | |
| 875 } | |
| 876 | |
| 877 ZoneBinaryCallback/*<R, T1, T2>*/ registerBinaryCallback/*<R, T1, T2>*/( | |
| 878 /*=R*/ callback(/*=T1*/ arg1, /*=T2*/ arg2)) { | |
| 879 var implementation = this._registerBinaryCallback; | |
| 880 assert(implementation != null); | |
| 881 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 882 RegisterBinaryCallbackHandler handler = implementation.function; | |
| 883 // TODO(floitsch): make this a generic method call on '<R, T1, T2>' once | |
| 884 // it's supported. Remove the unnecessary cast. | |
| 885 return handler(implementation.zone, parentDelegate, this, callback) | |
| 886 as Object/*=ZoneBinaryCallback<R, T1, T2>*/; | |
| 887 } | |
| 888 | |
| 889 AsyncError errorCallback(Object error, StackTrace stackTrace) { | |
| 890 var implementation = this._errorCallback; | |
| 891 assert(implementation != null); | |
| 892 final Zone implementationZone = implementation.zone; | |
| 893 if (identical(implementationZone, _ROOT_ZONE)) return null; | |
| 894 final ZoneDelegate parentDelegate = _parentDelegate(implementationZone); | |
| 895 ErrorCallbackHandler handler = implementation.function; | |
| 896 return handler( | |
| 897 implementationZone, parentDelegate, this, error, stackTrace); | |
| 898 } | |
| 899 | |
| 900 void scheduleMicrotask(void f()) { | |
| 901 var implementation = this._scheduleMicrotask; | |
| 902 assert(implementation != null); | |
| 903 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 904 ScheduleMicrotaskHandler handler = implementation.function; | |
| 905 return handler(implementation.zone, parentDelegate, this, f); | |
| 906 } | |
| 907 | |
| 908 Timer createTimer(Duration duration, void f()) { | |
| 909 var implementation = this._createTimer; | |
| 910 assert(implementation != null); | |
| 911 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 912 CreateTimerHandler handler = implementation.function; | |
| 913 return handler(implementation.zone, parentDelegate, this, duration, f); | |
| 914 } | |
| 915 | |
| 916 Timer createPeriodicTimer(Duration duration, void f(Timer timer)) { | |
| 917 var implementation = this._createPeriodicTimer; | |
| 918 assert(implementation != null); | |
| 919 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 920 CreatePeriodicTimerHandler handler = implementation.function; | |
| 921 return handler( | |
| 922 implementation.zone, parentDelegate, this, duration, f); | |
| 923 } | |
| 924 | |
| 925 void print(String line) { | |
| 926 var implementation = this._print; | |
| 927 assert(implementation != null); | |
| 928 ZoneDelegate parentDelegate = _parentDelegate(implementation.zone); | |
| 929 PrintHandler handler = implementation.function; | |
| 930 return handler(implementation.zone, parentDelegate, this, line); | |
| 931 } | |
| 932 } | |
| 933 | |
| 934 /*=R*/ _rootHandleUncaughtError/*<R>*/( | |
| 935 Zone self, ZoneDelegate parent, Zone zone, error, StackTrace stackTrace) { | |
| 936 _schedulePriorityAsyncCallback(() { | |
| 937 if (error == null) error = new NullThrownError(); | |
| 938 if (stackTrace == null) throw error; | |
| 939 _rethrow(error, stackTrace); | |
| 940 }); | |
| 941 } | |
| 942 | |
| 943 external void _rethrow(Object error, StackTrace stackTrace); | |
| 944 | |
| 945 /*=R*/ _rootRun/*<R>*/(Zone self, ZoneDelegate parent, Zone zone, /*=R*/ f()) { | |
| 946 if (Zone._current == zone) return f(); | |
| 947 | |
| 948 Zone old = Zone._enter(zone); | |
| 949 try { | |
| 950 return f(); | |
| 951 } finally { | |
| 952 Zone._leave(old); | |
| 953 } | |
| 954 } | |
| 955 | |
| 956 /*=R*/ _rootRunUnary/*<R, T>*/(Zone self, ZoneDelegate parent, Zone zone, | |
| 957 /*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 958 if (Zone._current == zone) return f(arg); | |
| 959 | |
| 960 Zone old = Zone._enter(zone); | |
| 961 try { | |
| 962 return f(arg); | |
| 963 } finally { | |
| 964 Zone._leave(old); | |
| 965 } | |
| 966 } | |
| 967 | |
| 968 /*=R*/ _rootRunBinary/*<R, T1, T2>*/(Zone self, ZoneDelegate parent, Zone zone, | |
| 969 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 970 if (Zone._current == zone) return f(arg1, arg2); | |
| 971 | |
| 972 Zone old = Zone._enter(zone); | |
| 973 try { | |
| 974 return f(arg1, arg2); | |
| 975 } finally { | |
| 976 Zone._leave(old); | |
| 977 } | |
| 978 } | |
| 979 | |
| 980 ZoneCallback/*<R>*/ _rootRegisterCallback/*<R>*/( | |
| 981 Zone self, ZoneDelegate parent, Zone zone, /*=R*/ f()) { | |
| 982 return f; | |
| 983 } | |
| 984 | |
| 985 ZoneUnaryCallback/*<R, T>*/ _rootRegisterUnaryCallback/*<R, T>*/( | |
| 986 Zone self, ZoneDelegate parent, Zone zone, /*=R*/ f(/*=T*/ arg)) { | |
| 987 return f; | |
| 988 } | |
| 989 | |
| 990 ZoneBinaryCallback/*<R, T1, T2>*/ _rootRegisterBinaryCallback/*<R, T1, T2>*/( | |
| 991 Zone self, ZoneDelegate parent, Zone zone, | |
| 992 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2)) { | |
| 993 return f; | |
| 994 } | |
| 995 | |
| 996 AsyncError _rootErrorCallback(Zone self, ZoneDelegate parent, Zone zone, | |
| 997 Object error, StackTrace stackTrace) => null; | |
| 998 | |
| 999 void _rootScheduleMicrotask(Zone self, ZoneDelegate parent, Zone zone, f()) { | |
| 1000 if (!identical(_ROOT_ZONE, zone)) { | |
| 1001 bool hasErrorHandler = !_ROOT_ZONE.inSameErrorZone(zone); | |
| 1002 f = zone.bindCallback(f, runGuarded: hasErrorHandler); | |
| 1003 // Use root zone as event zone if the function is already bound. | |
| 1004 zone = _ROOT_ZONE; | |
| 1005 } | |
| 1006 _scheduleAsyncCallback(f); | |
| 1007 } | |
| 1008 | |
| 1009 Timer _rootCreateTimer(Zone self, ZoneDelegate parent, Zone zone, | |
| 1010 Duration duration, void callback()) { | |
| 1011 if (!identical(_ROOT_ZONE, zone)) { | |
| 1012 callback = zone.bindCallback(callback); | |
| 1013 } | |
| 1014 return Timer._createTimer(duration, callback); | |
| 1015 } | |
| 1016 | |
| 1017 Timer _rootCreatePeriodicTimer( | |
| 1018 Zone self, ZoneDelegate parent, Zone zone, | |
| 1019 Duration duration, void callback(Timer timer)) { | |
| 1020 if (!identical(_ROOT_ZONE, zone)) { | |
| 1021 // TODO(floitsch): the return type should be 'void'. | |
| 1022 callback = zone.bindUnaryCallback/*<dynamic, Timer>*/(callback); | |
| 1023 } | |
| 1024 return Timer._createPeriodicTimer(duration, callback); | |
| 1025 } | |
| 1026 | |
| 1027 void _rootPrint(Zone self, ZoneDelegate parent, Zone zone, String line) { | |
| 1028 printToConsole(line); | |
| 1029 } | |
| 1030 | |
| 1031 void _printToZone(String line) { | |
| 1032 Zone.current.print(line); | |
| 1033 } | |
| 1034 | |
| 1035 Zone _rootFork(Zone self, ZoneDelegate parent, Zone zone, | |
| 1036 ZoneSpecification specification, | |
| 1037 Map zoneValues) { | |
| 1038 // TODO(floitsch): it would be nice if we could get rid of this hack. | |
| 1039 // Change the static zoneOrDirectPrint function to go through zones | |
| 1040 // from now on. | |
| 1041 printToZone = _printToZone; | |
| 1042 | |
| 1043 if (specification == null) { | |
| 1044 specification = const ZoneSpecification(); | |
| 1045 } else if (specification is! _ZoneSpecification) { | |
| 1046 throw new ArgumentError("ZoneSpecifications must be instantiated" | |
| 1047 " with the provided constructor."); | |
| 1048 } | |
| 1049 Map valueMap; | |
| 1050 if (zoneValues == null) { | |
| 1051 if (zone is _Zone) { | |
| 1052 valueMap = zone._map; | |
| 1053 } else { | |
| 1054 valueMap = new HashMap(); | |
| 1055 } | |
| 1056 } else { | |
| 1057 valueMap = new HashMap.from(zoneValues); | |
| 1058 } | |
| 1059 return new _CustomZone(zone, specification, valueMap); | |
| 1060 } | |
| 1061 | |
| 1062 class _RootZone extends _Zone { | |
| 1063 const _RootZone(); | |
| 1064 | |
| 1065 _ZoneFunction<RunHandler> get _run => | |
| 1066 const _ZoneFunction<RunHandler>(_ROOT_ZONE, _rootRun); | |
| 1067 _ZoneFunction<RunUnaryHandler> get _runUnary => | |
| 1068 const _ZoneFunction<RunUnaryHandler>(_ROOT_ZONE, _rootRunUnary); | |
| 1069 _ZoneFunction<RunBinaryHandler> get _runBinary => | |
| 1070 const _ZoneFunction<RunBinaryHandler>(_ROOT_ZONE, _rootRunBinary); | |
| 1071 _ZoneFunction<RegisterCallbackHandler> get _registerCallback => | |
| 1072 const _ZoneFunction<RegisterCallbackHandler>( | |
| 1073 _ROOT_ZONE, _rootRegisterCallback); | |
| 1074 _ZoneFunction<RegisterUnaryCallbackHandler> get _registerUnaryCallback => | |
| 1075 const _ZoneFunction<RegisterUnaryCallbackHandler>( | |
| 1076 _ROOT_ZONE, _rootRegisterUnaryCallback); | |
| 1077 _ZoneFunction<RegisterBinaryCallbackHandler> get _registerBinaryCallback => | |
| 1078 const _ZoneFunction<RegisterBinaryCallbackHandler>( | |
| 1079 _ROOT_ZONE, _rootRegisterBinaryCallback); | |
| 1080 _ZoneFunction<ErrorCallbackHandler> get _errorCallback => | |
| 1081 const _ZoneFunction<ErrorCallbackHandler>(_ROOT_ZONE, _rootErrorCallback); | |
| 1082 _ZoneFunction<ScheduleMicrotaskHandler> get _scheduleMicrotask => | |
| 1083 const _ZoneFunction<ScheduleMicrotaskHandler>( | |
| 1084 _ROOT_ZONE, _rootScheduleMicrotask); | |
| 1085 _ZoneFunction<CreateTimerHandler> get _createTimer => | |
| 1086 const _ZoneFunction<CreateTimerHandler>(_ROOT_ZONE, _rootCreateTimer); | |
| 1087 _ZoneFunction<CreatePeriodicTimerHandler> get _createPeriodicTimer => | |
| 1088 const _ZoneFunction<CreatePeriodicTimerHandler>(_ROOT_ZONE, _rootCreatePer
iodicTimer); | |
| 1089 _ZoneFunction<PrintHandler> get _print => | |
| 1090 const _ZoneFunction<PrintHandler>(_ROOT_ZONE, _rootPrint); | |
| 1091 _ZoneFunction<ForkHandler> get _fork => | |
| 1092 const _ZoneFunction<ForkHandler>(_ROOT_ZONE, _rootFork); | |
| 1093 _ZoneFunction<HandleUncaughtErrorHandler> get _handleUncaughtError => | |
| 1094 const _ZoneFunction<HandleUncaughtErrorHandler>( | |
| 1095 _ROOT_ZONE, _rootHandleUncaughtError); | |
| 1096 | |
| 1097 // The parent zone. | |
| 1098 _Zone get parent => null; | |
| 1099 | |
| 1100 /// The zone's scoped value declaration map. | |
| 1101 /// | |
| 1102 /// This is always a [HashMap]. | |
| 1103 Map get _map => _rootMap; | |
| 1104 | |
| 1105 static Map _rootMap = new HashMap(); | |
| 1106 | |
| 1107 static ZoneDelegate _rootDelegate; | |
| 1108 | |
| 1109 ZoneDelegate get _delegate { | |
| 1110 if (_rootDelegate != null) return _rootDelegate; | |
| 1111 return _rootDelegate = new _ZoneDelegate(this); | |
| 1112 } | |
| 1113 | |
| 1114 /** | |
| 1115 * The closest error-handling zone. | |
| 1116 * | |
| 1117 * Returns `this` if `this` has an error-handler. Otherwise returns the | |
| 1118 * parent's error-zone. | |
| 1119 */ | |
| 1120 Zone get errorZone => this; | |
| 1121 | |
| 1122 // Zone interface. | |
| 1123 | |
| 1124 /*=R*/ runGuarded/*<R>*/(/*=R*/ f()) { | |
| 1125 try { | |
| 1126 if (identical(_ROOT_ZONE, Zone._current)) { | |
| 1127 return f(); | |
| 1128 } | |
| 1129 return _rootRun/*<R>*/(null, null, this, f); | |
| 1130 } catch (e, s) { | |
| 1131 return handleUncaughtError/*<R>*/(e, s); | |
| 1132 } | |
| 1133 } | |
| 1134 | |
| 1135 /*=R*/ runUnaryGuarded/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 1136 try { | |
| 1137 if (identical(_ROOT_ZONE, Zone._current)) { | |
| 1138 return f(arg); | |
| 1139 } | |
| 1140 return _rootRunUnary/*<R, T>*/(null, null, this, f, arg); | |
| 1141 } catch (e, s) { | |
| 1142 return handleUncaughtError/*<R>*/(e, s); | |
| 1143 } | |
| 1144 } | |
| 1145 | |
| 1146 /*=R*/ runBinaryGuarded/*<R, T1, T2>*/( | |
| 1147 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 1148 try { | |
| 1149 if (identical(_ROOT_ZONE, Zone._current)) { | |
| 1150 return f(arg1, arg2); | |
| 1151 } | |
| 1152 return _rootRunBinary/*<R, T1, T2>*/(null, null, this, f, arg1, arg2); | |
| 1153 } catch (e, s) { | |
| 1154 return handleUncaughtError/*<R>*/(e, s); | |
| 1155 } | |
| 1156 } | |
| 1157 | |
| 1158 ZoneCallback/*<R>*/ bindCallback/*<R>*/( | |
| 1159 /*=R*/ f(), { bool runGuarded: true }) { | |
| 1160 if (runGuarded) { | |
| 1161 return () => this.runGuarded/*<R>*/(f); | |
| 1162 } else { | |
| 1163 return () => this.run/*<R>*/(f); | |
| 1164 } | |
| 1165 } | |
| 1166 | |
| 1167 ZoneUnaryCallback/*<R, T>*/ bindUnaryCallback/*<R, T>*/( | |
| 1168 /*=R*/ f(/*=T*/ arg), { bool runGuarded: true }) { | |
| 1169 if (runGuarded) { | |
| 1170 return (arg) => this.runUnaryGuarded/*<R, T>*/(f, arg); | |
| 1171 } else { | |
| 1172 return (arg) => this.runUnary/*<R, T>*/(f, arg); | |
| 1173 } | |
| 1174 } | |
| 1175 | |
| 1176 ZoneBinaryCallback/*<R, T1, T2>*/ bindBinaryCallback/*<R, T1, T2>*/( | |
| 1177 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), { bool runGuarded: true }) { | |
| 1178 if (runGuarded) { | |
| 1179 return (arg1, arg2) => | |
| 1180 this.runBinaryGuarded/*<R, T1, T2>*/(f, arg1, arg2); | |
| 1181 } else { | |
| 1182 return (arg1, arg2) => this.runBinary/*<R, T1, T2>*/(f, arg1, arg2); | |
| 1183 } | |
| 1184 } | |
| 1185 | |
| 1186 operator [](Object key) => null; | |
| 1187 | |
| 1188 // Methods that can be customized by the zone specification. | |
| 1189 | |
| 1190 /*=R*/ handleUncaughtError/*<R>*/(error, StackTrace stackTrace) { | |
| 1191 return _rootHandleUncaughtError(null, null, this, error, stackTrace); | |
| 1192 } | |
| 1193 | |
| 1194 Zone fork({ZoneSpecification specification, Map zoneValues}) { | |
| 1195 return _rootFork(null, null, this, specification, zoneValues); | |
| 1196 } | |
| 1197 | |
| 1198 /*=R*/ run/*<R>*/(/*=R*/ f()) { | |
| 1199 if (identical(Zone._current, _ROOT_ZONE)) return f(); | |
| 1200 return _rootRun(null, null, this, f); | |
| 1201 } | |
| 1202 | |
| 1203 /*=R*/ runUnary/*<R, T>*/(/*=R*/ f(/*=T*/ arg), /*=T*/ arg) { | |
| 1204 if (identical(Zone._current, _ROOT_ZONE)) return f(arg); | |
| 1205 return _rootRunUnary(null, null, this, f, arg); | |
| 1206 } | |
| 1207 | |
| 1208 /*=R*/ runBinary/*<R, T1, T2>*/( | |
| 1209 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2), /*=T1*/ arg1, /*=T2*/ arg2) { | |
| 1210 if (identical(Zone._current, _ROOT_ZONE)) return f(arg1, arg2); | |
| 1211 return _rootRunBinary(null, null, this, f, arg1, arg2); | |
| 1212 } | |
| 1213 | |
| 1214 ZoneCallback/*<R>*/ registerCallback/*<R>*/(/*=R*/ f()) => f; | |
| 1215 | |
| 1216 ZoneUnaryCallback/*<R, T>*/ registerUnaryCallback/*<R, T>*/( | |
| 1217 /*=R*/ f(/*=T*/ arg)) => f; | |
| 1218 | |
| 1219 ZoneBinaryCallback/*<R, T1, T2>*/ registerBinaryCallback/*<R, T1, T2>*/( | |
| 1220 /*=R*/ f(/*=T1*/ arg1, /*=T2*/ arg2)) => f; | |
| 1221 | |
| 1222 AsyncError errorCallback(Object error, StackTrace stackTrace) => null; | |
| 1223 | |
| 1224 void scheduleMicrotask(void f()) { | |
| 1225 _rootScheduleMicrotask(null, null, this, f); | |
| 1226 } | |
| 1227 | |
| 1228 Timer createTimer(Duration duration, void f()) { | |
| 1229 return Timer._createTimer(duration, f); | |
| 1230 } | |
| 1231 | |
| 1232 Timer createPeriodicTimer(Duration duration, void f(Timer timer)) { | |
| 1233 return Timer._createPeriodicTimer(duration, f); | |
| 1234 } | |
| 1235 | |
| 1236 void print(String line) { | |
| 1237 printToConsole(line); | |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 const _ROOT_ZONE = const _RootZone(); | |
| 1242 | |
| 1243 /** | |
| 1244 * Runs [body] in its own zone. | |
| 1245 * | |
| 1246 * If [onError] is non-null the zone is considered an error zone. All uncaught | |
| 1247 * errors, synchronous or asynchronous, in the zone are caught and handled | |
| 1248 * by the callback. | |
| 1249 * | |
| 1250 * Errors may never cross error-zone boundaries. This is intuitive for leaving | |
| 1251 * a zone, but it also applies for errors that would enter an error-zone. | |
| 1252 * Errors that try to cross error-zone boundaries are considered uncaught. | |
| 1253 * | |
| 1254 * var future = new Future.value(499); | |
| 1255 * runZoned(() { | |
| 1256 * future = future.then((_) { throw "error in first error-zone"; }); | |
| 1257 * runZoned(() { | |
| 1258 * future = future.catchError((e) { print("Never reached!"); }); | |
| 1259 * }, onError: (e) { print("unused error handler"); }); | |
| 1260 * }, onError: (e) { print("catches error of first error-zone."); }); | |
| 1261 * | |
| 1262 * Example: | |
| 1263 * | |
| 1264 * runZoned(() { | |
| 1265 * new Future(() { throw "asynchronous error"; }); | |
| 1266 * }, onError: print); // Will print "asynchronous error". | |
| 1267 */ | |
| 1268 /*=R*/ runZoned/*<R>*/(/*=R*/ body(), | |
| 1269 { Map zoneValues, | |
| 1270 ZoneSpecification zoneSpecification, | |
| 1271 Function onError }) { | |
| 1272 HandleUncaughtErrorHandler errorHandler; | |
| 1273 if (onError != null) { | |
| 1274 errorHandler = (Zone self, ZoneDelegate parent, Zone zone, | |
| 1275 error, StackTrace stackTrace) { | |
| 1276 try { | |
| 1277 // Change this is check back to | |
| 1278 // onError is ZoneBinaryCallback<dynamic/*=R*/, dynamic, StackTrace> | |
| 1279 // once is checks for that type are handled correctly. | |
| 1280 if (onError is ZoneBinaryCallback<dynamic, dynamic, StackTrace>) { | |
| 1281 return self.parent.runBinary(onError, error, stackTrace) as Object/*=R
*/; | |
| 1282 } | |
| 1283 return self.parent.runUnary(onError, error); | |
| 1284 } catch(e, s) { | |
| 1285 if (identical(e, error)) { | |
| 1286 return parent.handleUncaughtError(zone, error, stackTrace); | |
| 1287 } else { | |
| 1288 return parent.handleUncaughtError(zone, e, s); | |
| 1289 } | |
| 1290 } | |
| 1291 }; | |
| 1292 } | |
| 1293 if (zoneSpecification == null) { | |
| 1294 zoneSpecification = | |
| 1295 new ZoneSpecification(handleUncaughtError: errorHandler); | |
| 1296 } else if (errorHandler != null) { | |
| 1297 zoneSpecification = | |
| 1298 new ZoneSpecification.from(zoneSpecification, | |
| 1299 handleUncaughtError: errorHandler); | |
| 1300 } | |
| 1301 Zone zone = Zone.current.fork(specification: zoneSpecification, | |
| 1302 zoneValues: zoneValues); | |
| 1303 if (onError != null) { | |
| 1304 return zone.runGuarded(body); | |
| 1305 } else { | |
| 1306 return zone.run(body); | |
| 1307 } | |
| 1308 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2698353003:
unfork DDC's copy of most SDK libraries (Closed)
