68 lines
1.9 KiB
JavaScript
68 lines
1.9 KiB
JavaScript
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"use strict";
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module.exports = function(Promise, INTERNAL, tryConvertToPromise, debug) {
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var calledBind = false;
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var rejectThis = function(_, e) {
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this._reject(e);
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};
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var targetRejected = function(e, context) {
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context.promiseRejectionQueued = true;
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context.bindingPromise._then(rejectThis, rejectThis, null, this, e);
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};
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var bindingResolved = function(thisArg, context) {
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if (((this._bitField & 50397184) === 0)) {
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this._resolveCallback(context.target);
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}
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};
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var bindingRejected = function(e, context) {
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if (!context.promiseRejectionQueued) this._reject(e);
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};
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Promise.prototype.bind = function (thisArg) {
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if (!calledBind) {
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calledBind = true;
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Promise.prototype._propagateFrom = debug.propagateFromFunction();
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Promise.prototype._boundValue = debug.boundValueFunction();
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}
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var maybePromise = tryConvertToPromise(thisArg);
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var ret = new Promise(INTERNAL);
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ret._propagateFrom(this, 1);
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var target = this._target();
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ret._setBoundTo(maybePromise);
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if (maybePromise instanceof Promise) {
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var context = {
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promiseRejectionQueued: false,
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promise: ret,
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target: target,
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bindingPromise: maybePromise
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};
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target._then(INTERNAL, targetRejected, undefined, ret, context);
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maybePromise._then(
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bindingResolved, bindingRejected, undefined, ret, context);
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ret._setOnCancel(maybePromise);
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} else {
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ret._resolveCallback(target);
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}
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return ret;
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};
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Promise.prototype._setBoundTo = function (obj) {
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if (obj !== undefined) {
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this._bitField = this._bitField | 2097152;
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this._boundTo = obj;
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} else {
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this._bitField = this._bitField & (~2097152);
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}
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};
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Promise.prototype._isBound = function () {
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return (this._bitField & 2097152) === 2097152;
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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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};
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