conflicts solved
This commit is contained in:
opbnq-q
792
node_modules/@wailsio/runtime/dist/cancellable.js
generated
vendored
Normal file
792
node_modules/@wailsio/runtime/dist/cancellable.js
generated
vendored
Normal file
@@ -0,0 +1,792 @@
|
||||
/*
|
||||
_ __ _ __
|
||||
| | / /___ _(_) /____
|
||||
| | /| / / __ `/ / / ___/
|
||||
| |/ |/ / /_/ / / (__ )
|
||||
|__/|__/\__,_/_/_/____/
|
||||
The electron alternative for Go
|
||||
(c) Lea Anthony 2019-present
|
||||
*/
|
||||
var _a;
|
||||
import isCallable from "./callable.js";
|
||||
/**
|
||||
* Exception class that will be used as rejection reason
|
||||
* in case a {@link CancellablePromise} is cancelled successfully.
|
||||
*
|
||||
* The value of the {@link name} property is the string `"CancelError"`.
|
||||
* The value of the {@link cause} property is the cause passed to the cancel method, if any.
|
||||
*/
|
||||
export class CancelError extends Error {
|
||||
/**
|
||||
* Constructs a new `CancelError` instance.
|
||||
* @param message - The error message.
|
||||
* @param options - Options to be forwarded to the Error constructor.
|
||||
*/
|
||||
constructor(message, options) {
|
||||
super(message, options);
|
||||
this.name = "CancelError";
|
||||
}
|
||||
}
|
||||
/**
|
||||
* Exception class that will be reported as an unhandled rejection
|
||||
* in case a {@link CancellablePromise} rejects after being cancelled,
|
||||
* or when the `oncancelled` callback throws or rejects.
|
||||
*
|
||||
* The value of the {@link name} property is the string `"CancelledRejectionError"`.
|
||||
* The value of the {@link cause} property is the reason the promise rejected with.
|
||||
*
|
||||
* Because the original promise was cancelled,
|
||||
* a wrapper promise will be passed to the unhandled rejection listener instead.
|
||||
* The {@link promise} property holds a reference to the original promise.
|
||||
*/
|
||||
export class CancelledRejectionError extends Error {
|
||||
/**
|
||||
* Constructs a new `CancelledRejectionError` instance.
|
||||
* @param promise - The promise that caused the error originally.
|
||||
* @param reason - The rejection reason.
|
||||
* @param info - An optional informative message specifying the circumstances in which the error was thrown.
|
||||
* Defaults to the string `"Unhandled rejection in cancelled promise."`.
|
||||
*/
|
||||
constructor(promise, reason, info) {
|
||||
super((info !== null && info !== void 0 ? info : "Unhandled rejection in cancelled promise.") + " Reason: " + errorMessage(reason), { cause: reason });
|
||||
this.promise = promise;
|
||||
this.name = "CancelledRejectionError";
|
||||
}
|
||||
}
|
||||
// Private field names.
|
||||
const barrierSym = Symbol("barrier");
|
||||
const cancelImplSym = Symbol("cancelImpl");
|
||||
const species = (_a = Symbol.species) !== null && _a !== void 0 ? _a : Symbol("speciesPolyfill");
|
||||
/**
|
||||
* A promise with an attached method for cancelling long-running operations (see {@link CancellablePromise#cancel}).
|
||||
* Cancellation can optionally be bound to an {@link AbortSignal}
|
||||
* for better composability (see {@link CancellablePromise#cancelOn}).
|
||||
*
|
||||
* Cancelling a pending promise will result in an immediate rejection
|
||||
* with an instance of {@link CancelError} as reason,
|
||||
* but whoever started the promise will be responsible
|
||||
* for actually aborting the underlying operation.
|
||||
* To this purpose, the constructor and all chaining methods
|
||||
* accept optional cancellation callbacks.
|
||||
*
|
||||
* If a `CancellablePromise` still resolves after having been cancelled,
|
||||
* the result will be discarded. If it rejects, the reason
|
||||
* will be reported as an unhandled rejection,
|
||||
* wrapped in a {@link CancelledRejectionError} instance.
|
||||
* To facilitate the handling of cancellation requests,
|
||||
* cancelled `CancellablePromise`s will _not_ report unhandled `CancelError`s
|
||||
* whose `cause` field is the same as the one with which the current promise was cancelled.
|
||||
*
|
||||
* All usual promise methods are defined and return a `CancellablePromise`
|
||||
* whose cancel method will cancel the parent operation as well, propagating the cancellation reason
|
||||
* upwards through promise chains.
|
||||
* Conversely, cancelling a promise will not automatically cancel dependent promises downstream:
|
||||
* ```ts
|
||||
* let root = new CancellablePromise((resolve, reject) => { ... });
|
||||
* let child1 = root.then(() => { ... });
|
||||
* let child2 = child1.then(() => { ... });
|
||||
* let child3 = root.catch(() => { ... });
|
||||
* child1.cancel(); // Cancels child1 and root, but not child2 or child3
|
||||
* ```
|
||||
* Cancelling a promise that has already settled is safe and has no consequence.
|
||||
*
|
||||
* The `cancel` method returns a promise that _always fulfills_
|
||||
* after the whole chain has processed the cancel request
|
||||
* and all attached callbacks up to that moment have run.
|
||||
*
|
||||
* All ES2024 promise methods (static and instance) are defined on CancellablePromise,
|
||||
* but actual availability may vary with OS/webview version.
|
||||
*
|
||||
* In line with the proposal at https://github.com/tc39/proposal-rm-builtin-subclassing,
|
||||
* `CancellablePromise` does not support transparent subclassing.
|
||||
* Extenders should take care to provide their own method implementations.
|
||||
* This might be reconsidered in case the proposal is retired.
|
||||
*
|
||||
* CancellablePromise is a wrapper around the DOM Promise object
|
||||
* and is compliant with the [Promises/A+ specification](https://promisesaplus.com/)
|
||||
* (it passes the [compliance suite](https://github.com/promises-aplus/promises-tests))
|
||||
* if so is the underlying implementation.
|
||||
*/
|
||||
export class CancellablePromise extends Promise {
|
||||
/**
|
||||
* Creates a new `CancellablePromise`.
|
||||
*
|
||||
* @param executor - A callback used to initialize the promise. This callback is passed two arguments:
|
||||
* a `resolve` callback used to resolve the promise with a value
|
||||
* or the result of another promise (possibly cancellable),
|
||||
* and a `reject` callback used to reject the promise with a provided reason or error.
|
||||
* If the value provided to the `resolve` callback is a thenable _and_ cancellable object
|
||||
* (it has a `then` _and_ a `cancel` method),
|
||||
* cancellation requests will be forwarded to that object and the oncancelled will not be invoked anymore.
|
||||
* If any one of the two callbacks is called _after_ the promise has been cancelled,
|
||||
* the provided values will be cancelled and resolved as usual,
|
||||
* but their results will be discarded.
|
||||
* However, if the resolution process ultimately ends up in a rejection
|
||||
* that is not due to cancellation, the rejection reason
|
||||
* will be wrapped in a {@link CancelledRejectionError}
|
||||
* and bubbled up as an unhandled rejection.
|
||||
* @param oncancelled - It is the caller's responsibility to ensure that any operation
|
||||
* started by the executor is properly halted upon cancellation.
|
||||
* This optional callback can be used to that purpose.
|
||||
* It will be called _synchronously_ with a cancellation cause
|
||||
* when cancellation is requested, _after_ the promise has already rejected
|
||||
* with a {@link CancelError}, but _before_
|
||||
* any {@link then}/{@link catch}/{@link finally} callback runs.
|
||||
* If the callback returns a thenable, the promise returned from {@link cancel}
|
||||
* will only fulfill after the former has settled.
|
||||
* Unhandled exceptions or rejections from the callback will be wrapped
|
||||
* in a {@link CancelledRejectionError} and bubbled up as unhandled rejections.
|
||||
* If the `resolve` callback is called before cancellation with a cancellable promise,
|
||||
* cancellation requests on this promise will be diverted to that promise,
|
||||
* and the original `oncancelled` callback will be discarded.
|
||||
*/
|
||||
constructor(executor, oncancelled) {
|
||||
let resolve;
|
||||
let reject;
|
||||
super((res, rej) => { resolve = res; reject = rej; });
|
||||
if (this.constructor[species] !== Promise) {
|
||||
throw new TypeError("CancellablePromise does not support transparent subclassing. Please refrain from overriding the [Symbol.species] static property.");
|
||||
}
|
||||
let promise = {
|
||||
promise: this,
|
||||
resolve,
|
||||
reject,
|
||||
get oncancelled() { return oncancelled !== null && oncancelled !== void 0 ? oncancelled : null; },
|
||||
set oncancelled(cb) { oncancelled = cb !== null && cb !== void 0 ? cb : undefined; }
|
||||
};
|
||||
const state = {
|
||||
get root() { return state; },
|
||||
resolving: false,
|
||||
settled: false
|
||||
};
|
||||
// Setup cancellation system.
|
||||
void Object.defineProperties(this, {
|
||||
[barrierSym]: {
|
||||
configurable: false,
|
||||
enumerable: false,
|
||||
writable: true,
|
||||
value: null
|
||||
},
|
||||
[cancelImplSym]: {
|
||||
configurable: false,
|
||||
enumerable: false,
|
||||
writable: false,
|
||||
value: cancellerFor(promise, state)
|
||||
}
|
||||
});
|
||||
// Run the actual executor.
|
||||
const rejector = rejectorFor(promise, state);
|
||||
try {
|
||||
executor(resolverFor(promise, state), rejector);
|
||||
}
|
||||
catch (err) {
|
||||
if (state.resolving) {
|
||||
console.log("Unhandled exception in CancellablePromise executor.", err);
|
||||
}
|
||||
else {
|
||||
rejector(err);
|
||||
}
|
||||
}
|
||||
}
|
||||
/**
|
||||
* Cancels immediately the execution of the operation associated with this promise.
|
||||
* The promise rejects with a {@link CancelError} instance as reason,
|
||||
* with the {@link CancelError#cause} property set to the given argument, if any.
|
||||
*
|
||||
* Has no effect if called after the promise has already settled;
|
||||
* repeated calls in particular are safe, but only the first one
|
||||
* will set the cancellation cause.
|
||||
*
|
||||
* The `CancelError` exception _need not_ be handled explicitly _on the promises that are being cancelled:_
|
||||
* cancelling a promise with no attached rejection handler does not trigger an unhandled rejection event.
|
||||
* Therefore, the following idioms are all equally correct:
|
||||
* ```ts
|
||||
* new CancellablePromise((resolve, reject) => { ... }).cancel();
|
||||
* new CancellablePromise((resolve, reject) => { ... }).then(...).cancel();
|
||||
* new CancellablePromise((resolve, reject) => { ... }).then(...).catch(...).cancel();
|
||||
* ```
|
||||
* Whenever some cancelled promise in a chain rejects with a `CancelError`
|
||||
* with the same cancellation cause as itself, the error will be discarded silently.
|
||||
* However, the `CancelError` _will still be delivered_ to all attached rejection handlers
|
||||
* added by {@link then} and related methods:
|
||||
* ```ts
|
||||
* let cancellable = new CancellablePromise((resolve, reject) => { ... });
|
||||
* cancellable.then(() => { ... }).catch(console.log);
|
||||
* cancellable.cancel(); // A CancelError is printed to the console.
|
||||
* ```
|
||||
* If the `CancelError` is not handled downstream by the time it reaches
|
||||
* a _non-cancelled_ promise, it _will_ trigger an unhandled rejection event,
|
||||
* just like normal rejections would:
|
||||
* ```ts
|
||||
* let cancellable = new CancellablePromise((resolve, reject) => { ... });
|
||||
* let chained = cancellable.then(() => { ... }).then(() => { ... }); // No catch...
|
||||
* cancellable.cancel(); // Unhandled rejection event on chained!
|
||||
* ```
|
||||
* Therefore, it is important to either cancel whole promise chains from their tail,
|
||||
* as shown in the correct idioms above, or take care of handling errors everywhere.
|
||||
*
|
||||
* @returns A cancellable promise that _fulfills_ after the cancel callback (if any)
|
||||
* and all handlers attached up to the call to cancel have run.
|
||||
* If the cancel callback returns a thenable, the promise returned by `cancel`
|
||||
* will also wait for that thenable to settle.
|
||||
* This enables callers to wait for the cancelled operation to terminate
|
||||
* without being forced to handle potential errors at the call site.
|
||||
* ```ts
|
||||
* cancellable.cancel().then(() => {
|
||||
* // Cleanup finished, it's safe to do something else.
|
||||
* }, (err) => {
|
||||
* // Unreachable: the promise returned from cancel will never reject.
|
||||
* });
|
||||
* ```
|
||||
* Note that the returned promise will _not_ handle implicitly any rejection
|
||||
* that might have occurred already in the cancelled chain.
|
||||
* It will just track whether registered handlers have been executed or not.
|
||||
* Therefore, unhandled rejections will never be silently handled by calling cancel.
|
||||
*/
|
||||
cancel(cause) {
|
||||
return new CancellablePromise((resolve) => {
|
||||
// INVARIANT: the result of this[cancelImplSym] and the barrier do not ever reject.
|
||||
// Unfortunately macOS High Sierra does not support Promise.allSettled.
|
||||
Promise.all([
|
||||
this[cancelImplSym](new CancelError("Promise cancelled.", { cause })),
|
||||
currentBarrier(this)
|
||||
]).then(() => resolve(), () => resolve());
|
||||
});
|
||||
}
|
||||
/**
|
||||
* Binds promise cancellation to the abort event of the given {@link AbortSignal}.
|
||||
* If the signal has already aborted, the promise will be cancelled immediately.
|
||||
* When either condition is verified, the cancellation cause will be set
|
||||
* to the signal's abort reason (see {@link AbortSignal#reason}).
|
||||
*
|
||||
* Has no effect if called (or if the signal aborts) _after_ the promise has already settled.
|
||||
* Only the first signal to abort will set the cancellation cause.
|
||||
*
|
||||
* For more details about the cancellation process,
|
||||
* see {@link cancel} and the `CancellablePromise` constructor.
|
||||
*
|
||||
* This method enables `await`ing cancellable promises without having
|
||||
* to store them for future cancellation, e.g.:
|
||||
* ```ts
|
||||
* await longRunningOperation().cancelOn(signal);
|
||||
* ```
|
||||
* instead of:
|
||||
* ```ts
|
||||
* let promiseToBeCancelled = longRunningOperation();
|
||||
* await promiseToBeCancelled;
|
||||
* ```
|
||||
*
|
||||
* @returns This promise, for method chaining.
|
||||
*/
|
||||
cancelOn(signal) {
|
||||
if (signal.aborted) {
|
||||
void this.cancel(signal.reason);
|
||||
}
|
||||
else {
|
||||
signal.addEventListener('abort', () => void this.cancel(signal.reason), { capture: true });
|
||||
}
|
||||
return this;
|
||||
}
|
||||
/**
|
||||
* Attaches callbacks for the resolution and/or rejection of the `CancellablePromise`.
|
||||
*
|
||||
* The optional `oncancelled` argument will be invoked when the returned promise is cancelled,
|
||||
* with the same semantics as the `oncancelled` argument of the constructor.
|
||||
* When the parent promise rejects or is cancelled, the `onrejected` callback will run,
|
||||
* _even after the returned promise has been cancelled:_
|
||||
* in that case, should it reject or throw, the reason will be wrapped
|
||||
* in a {@link CancelledRejectionError} and bubbled up as an unhandled rejection.
|
||||
*
|
||||
* @param onfulfilled The callback to execute when the Promise is resolved.
|
||||
* @param onrejected The callback to execute when the Promise is rejected.
|
||||
* @returns A `CancellablePromise` for the completion of whichever callback is executed.
|
||||
* The returned promise is hooked up to propagate cancellation requests up the chain, but not down:
|
||||
*
|
||||
* - if the parent promise is cancelled, the `onrejected` handler will be invoked with a `CancelError`
|
||||
* and the returned promise _will resolve regularly_ with its result;
|
||||
* - conversely, if the returned promise is cancelled, _the parent promise is cancelled too;_
|
||||
* the `onrejected` handler will still be invoked with the parent's `CancelError`,
|
||||
* but its result will be discarded
|
||||
* and the returned promise will reject with a `CancelError` as well.
|
||||
*
|
||||
* The promise returned from {@link cancel} will fulfill only after all attached handlers
|
||||
* up the entire promise chain have been run.
|
||||
*
|
||||
* If either callback returns a cancellable promise,
|
||||
* cancellation requests will be diverted to it,
|
||||
* and the specified `oncancelled` callback will be discarded.
|
||||
*/
|
||||
then(onfulfilled, onrejected, oncancelled) {
|
||||
if (!(this instanceof CancellablePromise)) {
|
||||
throw new TypeError("CancellablePromise.prototype.then called on an invalid object.");
|
||||
}
|
||||
// NOTE: TypeScript's built-in type for then is broken,
|
||||
// as it allows specifying an arbitrary TResult1 != T even when onfulfilled is not a function.
|
||||
// We cannot fix it if we want to CancellablePromise to implement PromiseLike<T>.
|
||||
if (!isCallable(onfulfilled)) {
|
||||
onfulfilled = identity;
|
||||
}
|
||||
if (!isCallable(onrejected)) {
|
||||
onrejected = thrower;
|
||||
}
|
||||
if (onfulfilled === identity && onrejected == thrower) {
|
||||
// Shortcut for trivial arguments.
|
||||
return new CancellablePromise((resolve) => resolve(this));
|
||||
}
|
||||
const barrier = {};
|
||||
this[barrierSym] = barrier;
|
||||
return new CancellablePromise((resolve, reject) => {
|
||||
void super.then((value) => {
|
||||
var _a;
|
||||
if (this[barrierSym] === barrier) {
|
||||
this[barrierSym] = null;
|
||||
}
|
||||
(_a = barrier.resolve) === null || _a === void 0 ? void 0 : _a.call(barrier);
|
||||
try {
|
||||
resolve(onfulfilled(value));
|
||||
}
|
||||
catch (err) {
|
||||
reject(err);
|
||||
}
|
||||
}, (reason) => {
|
||||
var _a;
|
||||
if (this[barrierSym] === barrier) {
|
||||
this[barrierSym] = null;
|
||||
}
|
||||
(_a = barrier.resolve) === null || _a === void 0 ? void 0 : _a.call(barrier);
|
||||
try {
|
||||
resolve(onrejected(reason));
|
||||
}
|
||||
catch (err) {
|
||||
reject(err);
|
||||
}
|
||||
});
|
||||
}, async (cause) => {
|
||||
//cancelled = true;
|
||||
try {
|
||||
return oncancelled === null || oncancelled === void 0 ? void 0 : oncancelled(cause);
|
||||
}
|
||||
finally {
|
||||
await this.cancel(cause);
|
||||
}
|
||||
});
|
||||
}
|
||||
/**
|
||||
* Attaches a callback for only the rejection of the Promise.
|
||||
*
|
||||
* The optional `oncancelled` argument will be invoked when the returned promise is cancelled,
|
||||
* with the same semantics as the `oncancelled` argument of the constructor.
|
||||
* When the parent promise rejects or is cancelled, the `onrejected` callback will run,
|
||||
* _even after the returned promise has been cancelled:_
|
||||
* in that case, should it reject or throw, the reason will be wrapped
|
||||
* in a {@link CancelledRejectionError} and bubbled up as an unhandled rejection.
|
||||
*
|
||||
* It is equivalent to
|
||||
* ```ts
|
||||
* cancellablePromise.then(undefined, onrejected, oncancelled);
|
||||
* ```
|
||||
* and the same caveats apply.
|
||||
*
|
||||
* @returns A Promise for the completion of the callback.
|
||||
* Cancellation requests on the returned promise
|
||||
* will propagate up the chain to the parent promise,
|
||||
* but not in the other direction.
|
||||
*
|
||||
* The promise returned from {@link cancel} will fulfill only after all attached handlers
|
||||
* up the entire promise chain have been run.
|
||||
*
|
||||
* If `onrejected` returns a cancellable promise,
|
||||
* cancellation requests will be diverted to it,
|
||||
* and the specified `oncancelled` callback will be discarded.
|
||||
* See {@link then} for more details.
|
||||
*/
|
||||
catch(onrejected, oncancelled) {
|
||||
return this.then(undefined, onrejected, oncancelled);
|
||||
}
|
||||
/**
|
||||
* Attaches a callback that is invoked when the CancellablePromise is settled (fulfilled or rejected). The
|
||||
* resolved value cannot be accessed or modified from the callback.
|
||||
* The returned promise will settle in the same state as the original one
|
||||
* after the provided callback has completed execution,
|
||||
* unless the callback throws or returns a rejecting promise,
|
||||
* in which case the returned promise will reject as well.
|
||||
*
|
||||
* The optional `oncancelled` argument will be invoked when the returned promise is cancelled,
|
||||
* with the same semantics as the `oncancelled` argument of the constructor.
|
||||
* Once the parent promise settles, the `onfinally` callback will run,
|
||||
* _even after the returned promise has been cancelled:_
|
||||
* in that case, should it reject or throw, the reason will be wrapped
|
||||
* in a {@link CancelledRejectionError} and bubbled up as an unhandled rejection.
|
||||
*
|
||||
* This method is implemented in terms of {@link then} and the same caveats apply.
|
||||
* It is polyfilled, hence available in every OS/webview version.
|
||||
*
|
||||
* @returns A Promise for the completion of the callback.
|
||||
* Cancellation requests on the returned promise
|
||||
* will propagate up the chain to the parent promise,
|
||||
* but not in the other direction.
|
||||
*
|
||||
* The promise returned from {@link cancel} will fulfill only after all attached handlers
|
||||
* up the entire promise chain have been run.
|
||||
*
|
||||
* If `onfinally` returns a cancellable promise,
|
||||
* cancellation requests will be diverted to it,
|
||||
* and the specified `oncancelled` callback will be discarded.
|
||||
* See {@link then} for more details.
|
||||
*/
|
||||
finally(onfinally, oncancelled) {
|
||||
if (!(this instanceof CancellablePromise)) {
|
||||
throw new TypeError("CancellablePromise.prototype.finally called on an invalid object.");
|
||||
}
|
||||
if (!isCallable(onfinally)) {
|
||||
return this.then(onfinally, onfinally, oncancelled);
|
||||
}
|
||||
return this.then((value) => CancellablePromise.resolve(onfinally()).then(() => value), (reason) => CancellablePromise.resolve(onfinally()).then(() => { throw reason; }), oncancelled);
|
||||
}
|
||||
/**
|
||||
* We use the `[Symbol.species]` static property, if available,
|
||||
* to disable the built-in automatic subclassing features from {@link Promise}.
|
||||
* It is critical for performance reasons that extenders do not override this.
|
||||
* Once the proposal at https://github.com/tc39/proposal-rm-builtin-subclassing
|
||||
* is either accepted or retired, this implementation will have to be revised accordingly.
|
||||
*
|
||||
* @ignore
|
||||
* @internal
|
||||
*/
|
||||
static get [species]() {
|
||||
return Promise;
|
||||
}
|
||||
static all(values) {
|
||||
let collected = Array.from(values);
|
||||
const promise = collected.length === 0
|
||||
? CancellablePromise.resolve(collected)
|
||||
: new CancellablePromise((resolve, reject) => {
|
||||
void Promise.all(collected).then(resolve, reject);
|
||||
}, (cause) => cancelAll(promise, collected, cause));
|
||||
return promise;
|
||||
}
|
||||
static allSettled(values) {
|
||||
let collected = Array.from(values);
|
||||
const promise = collected.length === 0
|
||||
? CancellablePromise.resolve(collected)
|
||||
: new CancellablePromise((resolve, reject) => {
|
||||
void Promise.allSettled(collected).then(resolve, reject);
|
||||
}, (cause) => cancelAll(promise, collected, cause));
|
||||
return promise;
|
||||
}
|
||||
static any(values) {
|
||||
let collected = Array.from(values);
|
||||
const promise = collected.length === 0
|
||||
? CancellablePromise.resolve(collected)
|
||||
: new CancellablePromise((resolve, reject) => {
|
||||
void Promise.any(collected).then(resolve, reject);
|
||||
}, (cause) => cancelAll(promise, collected, cause));
|
||||
return promise;
|
||||
}
|
||||
static race(values) {
|
||||
let collected = Array.from(values);
|
||||
const promise = new CancellablePromise((resolve, reject) => {
|
||||
void Promise.race(collected).then(resolve, reject);
|
||||
}, (cause) => cancelAll(promise, collected, cause));
|
||||
return promise;
|
||||
}
|
||||
/**
|
||||
* Creates a new cancelled CancellablePromise for the provided cause.
|
||||
*
|
||||
* @group Static Methods
|
||||
*/
|
||||
static cancel(cause) {
|
||||
const p = new CancellablePromise(() => { });
|
||||
p.cancel(cause);
|
||||
return p;
|
||||
}
|
||||
/**
|
||||
* Creates a new CancellablePromise that cancels
|
||||
* after the specified timeout, with the provided cause.
|
||||
*
|
||||
* If the {@link AbortSignal.timeout} factory method is available,
|
||||
* it is used to base the timeout on _active_ time rather than _elapsed_ time.
|
||||
* Otherwise, `timeout` falls back to {@link setTimeout}.
|
||||
*
|
||||
* @group Static Methods
|
||||
*/
|
||||
static timeout(milliseconds, cause) {
|
||||
const promise = new CancellablePromise(() => { });
|
||||
if (AbortSignal && typeof AbortSignal === 'function' && AbortSignal.timeout && typeof AbortSignal.timeout === 'function') {
|
||||
AbortSignal.timeout(milliseconds).addEventListener('abort', () => void promise.cancel(cause));
|
||||
}
|
||||
else {
|
||||
setTimeout(() => void promise.cancel(cause), milliseconds);
|
||||
}
|
||||
return promise;
|
||||
}
|
||||
static sleep(milliseconds, value) {
|
||||
return new CancellablePromise((resolve) => {
|
||||
setTimeout(() => resolve(value), milliseconds);
|
||||
});
|
||||
}
|
||||
/**
|
||||
* Creates a new rejected CancellablePromise for the provided reason.
|
||||
*
|
||||
* @group Static Methods
|
||||
*/
|
||||
static reject(reason) {
|
||||
return new CancellablePromise((_, reject) => reject(reason));
|
||||
}
|
||||
static resolve(value) {
|
||||
if (value instanceof CancellablePromise) {
|
||||
// Optimise for cancellable promises.
|
||||
return value;
|
||||
}
|
||||
return new CancellablePromise((resolve) => resolve(value));
|
||||
}
|
||||
/**
|
||||
* Creates a new CancellablePromise and returns it in an object, along with its resolve and reject functions
|
||||
* and a getter/setter for the cancellation callback.
|
||||
*
|
||||
* This method is polyfilled, hence available in every OS/webview version.
|
||||
*
|
||||
* @group Static Methods
|
||||
*/
|
||||
static withResolvers() {
|
||||
let result = { oncancelled: null };
|
||||
result.promise = new CancellablePromise((resolve, reject) => {
|
||||
result.resolve = resolve;
|
||||
result.reject = reject;
|
||||
}, (cause) => { var _a; (_a = result.oncancelled) === null || _a === void 0 ? void 0 : _a.call(result, cause); });
|
||||
return result;
|
||||
}
|
||||
}
|
||||
/**
|
||||
* Returns a callback that implements the cancellation algorithm for the given cancellable promise.
|
||||
* The promise returned from the resulting function does not reject.
|
||||
*/
|
||||
function cancellerFor(promise, state) {
|
||||
let cancellationPromise = undefined;
|
||||
return (reason) => {
|
||||
if (!state.settled) {
|
||||
state.settled = true;
|
||||
state.reason = reason;
|
||||
promise.reject(reason);
|
||||
// Attach an error handler that ignores this specific rejection reason and nothing else.
|
||||
// In theory, a sane underlying implementation at this point
|
||||
// should always reject with our cancellation reason,
|
||||
// hence the handler will never throw.
|
||||
void Promise.prototype.then.call(promise.promise, undefined, (err) => {
|
||||
if (err !== reason) {
|
||||
throw err;
|
||||
}
|
||||
});
|
||||
}
|
||||
// If reason is not set, the promise resolved regularly, hence we must not call oncancelled.
|
||||
// If oncancelled is unset, no need to go any further.
|
||||
if (!state.reason || !promise.oncancelled) {
|
||||
return;
|
||||
}
|
||||
cancellationPromise = new Promise((resolve) => {
|
||||
try {
|
||||
resolve(promise.oncancelled(state.reason.cause));
|
||||
}
|
||||
catch (err) {
|
||||
Promise.reject(new CancelledRejectionError(promise.promise, err, "Unhandled exception in oncancelled callback."));
|
||||
}
|
||||
}).catch((reason) => {
|
||||
Promise.reject(new CancelledRejectionError(promise.promise, reason, "Unhandled rejection in oncancelled callback."));
|
||||
});
|
||||
// Unset oncancelled to prevent repeated calls.
|
||||
promise.oncancelled = null;
|
||||
return cancellationPromise;
|
||||
};
|
||||
}
|
||||
/**
|
||||
* Returns a callback that implements the resolution algorithm for the given cancellable promise.
|
||||
*/
|
||||
function resolverFor(promise, state) {
|
||||
return (value) => {
|
||||
if (state.resolving) {
|
||||
return;
|
||||
}
|
||||
state.resolving = true;
|
||||
if (value === promise.promise) {
|
||||
if (state.settled) {
|
||||
return;
|
||||
}
|
||||
state.settled = true;
|
||||
promise.reject(new TypeError("A promise cannot be resolved with itself."));
|
||||
return;
|
||||
}
|
||||
if (value != null && (typeof value === 'object' || typeof value === 'function')) {
|
||||
let then;
|
||||
try {
|
||||
then = value.then;
|
||||
}
|
||||
catch (err) {
|
||||
state.settled = true;
|
||||
promise.reject(err);
|
||||
return;
|
||||
}
|
||||
if (isCallable(then)) {
|
||||
try {
|
||||
let cancel = value.cancel;
|
||||
if (isCallable(cancel)) {
|
||||
const oncancelled = (cause) => {
|
||||
Reflect.apply(cancel, value, [cause]);
|
||||
};
|
||||
if (state.reason) {
|
||||
// If already cancelled, propagate cancellation.
|
||||
// The promise returned from the canceller algorithm does not reject
|
||||
// so it can be discarded safely.
|
||||
void cancellerFor(Object.assign(Object.assign({}, promise), { oncancelled }), state)(state.reason);
|
||||
}
|
||||
else {
|
||||
promise.oncancelled = oncancelled;
|
||||
}
|
||||
}
|
||||
}
|
||||
catch (_a) { }
|
||||
const newState = {
|
||||
root: state.root,
|
||||
resolving: false,
|
||||
get settled() { return this.root.settled; },
|
||||
set settled(value) { this.root.settled = value; },
|
||||
get reason() { return this.root.reason; }
|
||||
};
|
||||
const rejector = rejectorFor(promise, newState);
|
||||
try {
|
||||
Reflect.apply(then, value, [resolverFor(promise, newState), rejector]);
|
||||
}
|
||||
catch (err) {
|
||||
rejector(err);
|
||||
}
|
||||
return; // IMPORTANT!
|
||||
}
|
||||
}
|
||||
if (state.settled) {
|
||||
return;
|
||||
}
|
||||
state.settled = true;
|
||||
promise.resolve(value);
|
||||
};
|
||||
}
|
||||
/**
|
||||
* Returns a callback that implements the rejection algorithm for the given cancellable promise.
|
||||
*/
|
||||
function rejectorFor(promise, state) {
|
||||
return (reason) => {
|
||||
if (state.resolving) {
|
||||
return;
|
||||
}
|
||||
state.resolving = true;
|
||||
if (state.settled) {
|
||||
try {
|
||||
if (reason instanceof CancelError && state.reason instanceof CancelError && Object.is(reason.cause, state.reason.cause)) {
|
||||
// Swallow late rejections that are CancelErrors whose cancellation cause is the same as ours.
|
||||
return;
|
||||
}
|
||||
}
|
||||
catch (_a) { }
|
||||
void Promise.reject(new CancelledRejectionError(promise.promise, reason));
|
||||
}
|
||||
else {
|
||||
state.settled = true;
|
||||
promise.reject(reason);
|
||||
}
|
||||
};
|
||||
}
|
||||
/**
|
||||
* Cancels all values in an array that look like cancellable thenables.
|
||||
* Returns a promise that fulfills once all cancellation procedures for the given values have settled.
|
||||
*/
|
||||
function cancelAll(parent, values, cause) {
|
||||
const results = [];
|
||||
for (const value of values) {
|
||||
let cancel;
|
||||
try {
|
||||
if (!isCallable(value.then)) {
|
||||
continue;
|
||||
}
|
||||
cancel = value.cancel;
|
||||
if (!isCallable(cancel)) {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
catch (_a) {
|
||||
continue;
|
||||
}
|
||||
let result;
|
||||
try {
|
||||
result = Reflect.apply(cancel, value, [cause]);
|
||||
}
|
||||
catch (err) {
|
||||
Promise.reject(new CancelledRejectionError(parent, err, "Unhandled exception in cancel method."));
|
||||
continue;
|
||||
}
|
||||
if (!result) {
|
||||
continue;
|
||||
}
|
||||
results.push((result instanceof Promise ? result : Promise.resolve(result)).catch((reason) => {
|
||||
Promise.reject(new CancelledRejectionError(parent, reason, "Unhandled rejection in cancel method."));
|
||||
}));
|
||||
}
|
||||
return Promise.all(results);
|
||||
}
|
||||
/**
|
||||
* Returns its argument.
|
||||
*/
|
||||
function identity(x) {
|
||||
return x;
|
||||
}
|
||||
/**
|
||||
* Throws its argument.
|
||||
*/
|
||||
function thrower(reason) {
|
||||
throw reason;
|
||||
}
|
||||
/**
|
||||
* Attempts various strategies to convert an error to a string.
|
||||
*/
|
||||
function errorMessage(err) {
|
||||
try {
|
||||
if (err instanceof Error || typeof err !== 'object' || err.toString !== Object.prototype.toString) {
|
||||
return "" + err;
|
||||
}
|
||||
}
|
||||
catch (_a) { }
|
||||
try {
|
||||
return JSON.stringify(err);
|
||||
}
|
||||
catch (_b) { }
|
||||
try {
|
||||
return Object.prototype.toString.call(err);
|
||||
}
|
||||
catch (_c) { }
|
||||
return "<could not convert error to string>";
|
||||
}
|
||||
/**
|
||||
* Gets the current barrier promise for the given cancellable promise. If necessary, initialises the barrier.
|
||||
*/
|
||||
function currentBarrier(promise) {
|
||||
var _a;
|
||||
let pwr = (_a = promise[barrierSym]) !== null && _a !== void 0 ? _a : {};
|
||||
if (!('promise' in pwr)) {
|
||||
Object.assign(pwr, promiseWithResolvers());
|
||||
}
|
||||
if (promise[barrierSym] == null) {
|
||||
pwr.resolve();
|
||||
promise[barrierSym] = pwr;
|
||||
}
|
||||
return pwr.promise;
|
||||
}
|
||||
// Polyfill Promise.withResolvers.
|
||||
let promiseWithResolvers = Promise.withResolvers;
|
||||
if (promiseWithResolvers && typeof promiseWithResolvers === 'function') {
|
||||
promiseWithResolvers = promiseWithResolvers.bind(Promise);
|
||||
}
|
||||
else {
|
||||
promiseWithResolvers = function () {
|
||||
let resolve;
|
||||
let reject;
|
||||
const promise = new Promise((res, rej) => { resolve = res; reject = rej; });
|
||||
return { promise, resolve, reject };
|
||||
};
|
||||
}
|
||||
Reference in New Issue
Block a user