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