87 lines
2.1 KiB
JavaScript
87 lines
2.1 KiB
JavaScript
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"use strict";
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module.exports = function(Promise, INTERNAL) {
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var util = require("./util");
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var errorObj = util.errorObj;
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var isObject = util.isObject;
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function tryConvertToPromise(obj, context) {
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if (isObject(obj)) {
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if (obj instanceof Promise) return obj;
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var then = getThen(obj);
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if (then === errorObj) {
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if (context) context._pushContext();
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var ret = Promise.reject(then.e);
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if (context) context._popContext();
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return ret;
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} else if (typeof then === "function") {
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if (isAnyBluebirdPromise(obj)) {
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var ret = new Promise(INTERNAL);
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obj._then(
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ret._fulfill,
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ret._reject,
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undefined,
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ret,
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null
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);
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return ret;
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}
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return doThenable(obj, then, context);
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}
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}
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return obj;
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}
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function doGetThen(obj) {
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return obj.then;
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}
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function getThen(obj) {
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try {
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return doGetThen(obj);
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} catch (e) {
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errorObj.e = e;
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return errorObj;
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}
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}
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var hasProp = {}.hasOwnProperty;
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function isAnyBluebirdPromise(obj) {
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try {
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return hasProp.call(obj, "_promise0");
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} catch (e) {
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return false;
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}
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}
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function doThenable(x, then, context) {
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var promise = new Promise(INTERNAL);
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var ret = promise;
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if (context) context._pushContext();
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promise._captureStackTrace();
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if (context) context._popContext();
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var synchronous = true;
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var result = util.tryCatch(then).call(x, resolve, reject);
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synchronous = false;
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if (promise && result === errorObj) {
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promise._rejectCallback(result.e, true, true);
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promise = null;
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}
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function resolve(value) {
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if (!promise) return;
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promise._resolveCallback(value);
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promise = null;
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}
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function reject(reason) {
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if (!promise) return;
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promise._rejectCallback(reason, synchronous, true);
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promise = null;
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}
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return ret;
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}
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return tryConvertToPromise;
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};
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