| /** |
| * Copyright (c) 2014 Petka Antonov |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions:</p> |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| * |
| */ |
| "use strict"; |
| module.exports = function(Promise, INTERNAL) { |
| var errors = require("./errors.js"); |
| var TypeError = errors.TypeError; |
| var util = require("./util.js"); |
| var isArray = util.isArray; |
| var errorObj = util.errorObj; |
| var tryCatch1 = util.tryCatch1; |
| var yieldHandlers = []; |
| |
| function promiseFromYieldHandler(value) { |
| var _yieldHandlers = yieldHandlers; |
| var _errorObj = errorObj; |
| var _Promise = Promise; |
| var len = _yieldHandlers.length; |
| for (var i = 0; i < len; ++i) { |
| var result = tryCatch1(_yieldHandlers[i], void 0, value); |
| if (result === _errorObj) { |
| return _Promise.reject(_errorObj.e); |
| } |
| var maybePromise = _Promise._cast(result, |
| promiseFromYieldHandler, void 0); |
| if (maybePromise instanceof _Promise) return maybePromise; |
| } |
| return null; |
| } |
| |
| function PromiseSpawn(generatorFunction, receiver, caller) { |
| var promise = this._promise = new Promise(INTERNAL); |
| promise._setTrace(caller, void 0); |
| this._generatorFunction = generatorFunction; |
| this._receiver = receiver; |
| this._generator = void 0; |
| } |
| |
| PromiseSpawn.prototype.promise = function PromiseSpawn$promise() { |
| return this._promise; |
| }; |
| |
| PromiseSpawn.prototype._run = function PromiseSpawn$_run() { |
| this._generator = this._generatorFunction.call(this._receiver); |
| this._receiver = |
| this._generatorFunction = void 0; |
| this._next(void 0); |
| }; |
| |
| PromiseSpawn.prototype._continue = function PromiseSpawn$_continue(result) { |
| if (result === errorObj) { |
| this._generator = void 0; |
| var trace = errors.canAttach(result.e) |
| ? result.e : new Error(result.e + ""); |
| this._promise._attachExtraTrace(trace); |
| this._promise._reject(result.e, trace); |
| return; |
| } |
| |
| var value = result.value; |
| if (result.done === true) { |
| this._generator = void 0; |
| if (!this._promise._tryFollow(value)) { |
| this._promise._fulfill(value); |
| } |
| } |
| else { |
| var maybePromise = Promise._cast(value, PromiseSpawn$_continue, void 0); |
| if (!(maybePromise instanceof Promise)) { |
| if (isArray(maybePromise)) { |
| maybePromise = Promise.all(maybePromise); |
| } |
| else { |
| maybePromise = promiseFromYieldHandler(maybePromise); |
| } |
| if (maybePromise === null) { |
| this._throw(new TypeError("A value was yielded that could not be treated as a promise")); |
| return; |
| } |
| } |
| maybePromise._then( |
| this._next, |
| this._throw, |
| void 0, |
| this, |
| null, |
| void 0 |
| ); |
| } |
| }; |
| |
| PromiseSpawn.prototype._throw = function PromiseSpawn$_throw(reason) { |
| if (errors.canAttach(reason)) |
| this._promise._attachExtraTrace(reason); |
| this._continue( |
| tryCatch1(this._generator["throw"], this._generator, reason) |
| ); |
| }; |
| |
| PromiseSpawn.prototype._next = function PromiseSpawn$_next(value) { |
| this._continue( |
| tryCatch1(this._generator.next, this._generator, value) |
| ); |
| }; |
| |
| PromiseSpawn.addYieldHandler = function PromiseSpawn$AddYieldHandler(fn) { |
| if (typeof fn !== "function") throw new TypeError("fn must be a function"); |
| yieldHandlers.push(fn); |
| }; |
| |
| return PromiseSpawn; |
| }; |