You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
"use strict";
|
|
module.exports = function(Promise) {
|
|
var errors = require("./errors.js");
|
|
var async = require("./async.js");
|
|
var CancellationError = errors.CancellationError;
|
|
|
|
Promise.prototype._cancel = function (reason) {
|
|
if (!this.isCancellable()) return this;
|
|
var parent;
|
|
var promiseToReject = this;
|
|
while ((parent = promiseToReject._cancellationParent) !== undefined &&
|
|
parent.isCancellable()) {
|
|
promiseToReject = parent;
|
|
}
|
|
this._unsetCancellable();
|
|
promiseToReject._target()._rejectCallback(reason, false, true);
|
|
};
|
|
|
|
Promise.prototype.cancel = function (reason) {
|
|
if (!this.isCancellable()) return this;
|
|
if (reason === undefined) reason = new CancellationError();
|
|
async.invokeLater(this._cancel, this, reason);
|
|
return this;
|
|
};
|
|
|
|
Promise.prototype.cancellable = function () {
|
|
if (this._cancellable()) return this;
|
|
async.enableTrampoline();
|
|
this._setCancellable();
|
|
this._cancellationParent = undefined;
|
|
return this;
|
|
};
|
|
|
|
Promise.prototype.uncancellable = function () {
|
|
var ret = this.then();
|
|
ret._unsetCancellable();
|
|
return ret;
|
|
};
|
|
|
|
Promise.prototype.fork = function (didFulfill, didReject, didProgress) {
|
|
var ret = this._then(didFulfill, didReject, didProgress,
|
|
undefined, undefined);
|
|
|
|
ret._setCancellable();
|
|
ret._cancellationParent = undefined;
|
|
return ret;
|
|
};
|
|
};
|