118 lines
3 KiB
JavaScript
118 lines
3 KiB
JavaScript
"use strict";
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module.exports = function(
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Promise, PromiseArray, tryConvertToPromise, apiRejection) {
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var util = require("./util");
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var isObject = util.isObject;
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var es5 = require("./es5");
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var Es6Map;
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if (typeof Map === "function") Es6Map = Map;
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var mapToEntries = (function() {
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var index = 0;
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var size = 0;
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function extractEntry(value, key) {
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this[index] = value;
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this[index + size] = key;
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index++;
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}
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return function mapToEntries(map) {
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size = map.size;
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index = 0;
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var ret = new Array(map.size * 2);
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map.forEach(extractEntry, ret);
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return ret;
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};
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})();
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var entriesToMap = function(entries) {
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var ret = new Es6Map();
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var length = entries.length / 2 | 0;
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for (var i = 0; i < length; ++i) {
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var key = entries[length + i];
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var value = entries[i];
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ret.set(key, value);
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}
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return ret;
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};
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function PropertiesPromiseArray(obj) {
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var isMap = false;
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var entries;
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if (Es6Map !== undefined && obj instanceof Es6Map) {
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entries = mapToEntries(obj);
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isMap = true;
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} else {
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var keys = es5.keys(obj);
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var len = keys.length;
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entries = new Array(len * 2);
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for (var i = 0; i < len; ++i) {
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var key = keys[i];
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entries[i] = obj[key];
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entries[i + len] = key;
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}
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}
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this.constructor$(entries);
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this._isMap = isMap;
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this._init$(undefined, isMap ? -6 : -3);
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}
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util.inherits(PropertiesPromiseArray, PromiseArray);
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PropertiesPromiseArray.prototype._init = function () {};
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PropertiesPromiseArray.prototype._promiseFulfilled = function (value, index) {
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this._values[index] = value;
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var totalResolved = ++this._totalResolved;
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if (totalResolved >= this._length) {
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var val;
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if (this._isMap) {
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val = entriesToMap(this._values);
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} else {
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val = {};
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var keyOffset = this.length();
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for (var i = 0, len = this.length(); i < len; ++i) {
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val[this._values[i + keyOffset]] = this._values[i];
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}
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}
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this._resolve(val);
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return true;
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}
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return false;
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};
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PropertiesPromiseArray.prototype.shouldCopyValues = function () {
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return false;
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};
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PropertiesPromiseArray.prototype.getActualLength = function (len) {
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return len >> 1;
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};
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function props(promises) {
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var ret;
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var castValue = tryConvertToPromise(promises);
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if (!isObject(castValue)) {
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return apiRejection("cannot await properties of a non-object\u000a\u000a See http://goo.gl/MqrFmX\u000a");
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} else if (castValue instanceof Promise) {
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ret = castValue._then(
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Promise.props, undefined, undefined, undefined, undefined);
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} else {
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ret = new PropertiesPromiseArray(castValue).promise();
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}
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if (castValue instanceof Promise) {
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ret._propagateFrom(castValue, 2);
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}
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return ret;
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}
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Promise.prototype.props = function () {
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return props(this);
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};
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Promise.props = function (promises) {
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return props(promises);
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};
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};
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