72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
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"use strict";
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module.exports = function(Promise, INTERNAL, tryConvertToPromise) {
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function returnThis() { return this.value; }
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function throwThis() { throw this.reason; }
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function awaitBindingThenResolve(value) {
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return this._then(returnThis, null, null, {value: value}, undefined);
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}
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function awaitBindingThenReject(reason) {
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return this._then(throwThis, throwThis, null, {reason: reason}, undefined);
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}
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function setBinding(binding) { this._setBoundTo(binding); }
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Promise.prototype.bind = function (thisArg) {
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var maybePromise = tryConvertToPromise(thisArg);
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if (maybePromise instanceof Promise) {
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if (maybePromise.isFulfilled()) {
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thisArg = maybePromise.value();
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} else if (maybePromise.isRejected()) {
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return Promise.reject(maybePromise.reason());
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} else {
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var ret = this.then();
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var parent = ret;
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ret = ret._then(awaitBindingThenResolve,
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awaitBindingThenReject,
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null, maybePromise, undefined);
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maybePromise._then(setBinding, ret._reject, null, ret, null);
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if (!ret._cancellable()) ret._setPendingCancellationParent(parent);
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return ret;
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}
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}
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var ret = this.then();
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ret._setBoundTo(thisArg);
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return ret;
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};
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Promise.bind = function (thisArg, value) {
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return Promise.resolve(value).bind(thisArg);
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};
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Promise.prototype._setPendingCancellationParent = function(parent) {
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this._settledValue = parent;
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};
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Promise.prototype._pendingCancellationParent = function() {
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if (this.isPending() && this._settledValue !== undefined) {
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var ret = this._settledValue;
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ret.cancellable();
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this._settledValue = undefined;
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return ret;
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}
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};
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Promise.prototype._setIsMigratingBinding = function () {
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this._bitField = this._bitField | 8388608;
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};
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Promise.prototype._unsetIsMigratingBinding = function () {
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this._bitField = this._bitField & (~8388608);
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};
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Promise.prototype._isMigratingBinding = function () {
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return (this._bitField & 8388608) === 8388608;
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};
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Promise.prototype._setBoundTo = function (obj) {
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this._boundTo = obj;
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};
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Promise.prototype._isBound = function () {
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return this._boundTo !== undefined;
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};
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};
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