aaac7fed
 liuqimichale
add
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"use strict";
module.exports = function(
Promise, PromiseArray, tryConvertToPromise, apiRejection) {
var util = require("./util");
var isObject = util.isObject;
var es5 = require("./es5");
var Es6Map;
if (typeof Map === "function") Es6Map = Map;
var mapToEntries = (function() {
var index = 0;
var size = 0;
function extractEntry(value, key) {
this[index] = value;
this[index + size] = key;
index++;
}
return function mapToEntries(map) {
size = map.size;
index = 0;
var ret = new Array(map.size * 2);
map.forEach(extractEntry, ret);
return ret;
};
})();
var entriesToMap = function(entries) {
var ret = new Es6Map();
var length = entries.length / 2 | 0;
for (var i = 0; i < length; ++i) {
var key = entries[length + i];
var value = entries[i];
ret.set(key, value);
}
return ret;
};
function PropertiesPromiseArray(obj) {
var isMap = false;
var entries;
if (Es6Map !== undefined && obj instanceof Es6Map) {
entries = mapToEntries(obj);
isMap = true;
} else {
var keys = es5.keys(obj);
var len = keys.length;
entries = new Array(len * 2);
for (var i = 0; i < len; ++i) {
var key = keys[i];
entries[i] = obj[key];
entries[i + len] = key;
}
}
this.constructor$(entries);
this._isMap = isMap;
this._init$(undefined, isMap ? -6 : -3);
}
util.inherits(PropertiesPromiseArray, PromiseArray);
PropertiesPromiseArray.prototype._init = function () {};
PropertiesPromiseArray.prototype._promiseFulfilled = function (value, index) {
this._values[index] = value;
var totalResolved = ++this._totalResolved;
if (totalResolved >= this._length) {
var val;
if (this._isMap) {
val = entriesToMap(this._values);
} else {
val = {};
var keyOffset = this.length();
for (var i = 0, len = this.length(); i < len; ++i) {
val[this._values[i + keyOffset]] = this._values[i];
}
}
this._resolve(val);
return true;
}
return false;
};
PropertiesPromiseArray.prototype.shouldCopyValues = function () {
return false;
};
PropertiesPromiseArray.prototype.getActualLength = function (len) {
return len >> 1;
};
function props(promises) {
var ret;
var castValue = tryConvertToPromise(promises);
if (!isObject(castValue)) {
return apiRejection("cannot await properties of a non-object\u000a\u000a See http://goo.gl/MqrFmX\u000a");
} else if (castValue instanceof Promise) {
ret = castValue._then(
Promise.props, undefined, undefined, undefined, undefined);
} else {
ret = new PropertiesPromiseArray(castValue).promise();
}
if (castValue instanceof Promise) {
ret._propagateFrom(castValue, 2);
}
return ret;
}
Promise.prototype.props = function () {
return props(this);
};
Promise.props = function (promises) {
return props(promises);
};
};
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