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Unified Diff: third_party/polymer/components/promise-polyfill/Promise.js

Issue 2906483004: [pinpoint] Add iron-form and paper-checkbox to polymer components. (Closed)
Patch Set: Created 3 years, 7 months ago
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Index: third_party/polymer/components/promise-polyfill/Promise.js
diff --git a/third_party/polymer/components/promise-polyfill/Promise.js b/third_party/polymer/components/promise-polyfill/Promise.js
new file mode 100644
index 0000000000000000000000000000000000000000..b8388bf3e72c651f1d08661204711bf22e376b54
--- /dev/null
+++ b/third_party/polymer/components/promise-polyfill/Promise.js
@@ -0,0 +1,137 @@
+/**
+@license
+Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+function MakePromise (asap) {
+ function Promise(fn) {
+ if (typeof this !== 'object' || typeof fn !== 'function') throw new TypeError();
+ this._state = null;
+ this._value = null;
+ this._deferreds = []
+
+ doResolve(fn, resolve.bind(this), reject.bind(this));
+ }
+
+ function handle(deferred) {
+ var me = this;
+ if (this._state === null) {
+ this._deferreds.push(deferred);
+ return
+ }
+ asap(function() {
+ var cb = me._state ? deferred.onFulfilled : deferred.onRejected
+ if (typeof cb !== 'function') {
+ (me._state ? deferred.resolve : deferred.reject)(me._value);
+ return;
+ }
+ var ret;
+ try {
+ ret = cb(me._value);
+ }
+ catch (e) {
+ deferred.reject(e);
+ return;
+ }
+ deferred.resolve(ret);
+ })
+ }
+
+ function resolve(newValue) {
+ try { //Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
+ if (newValue === this) throw new TypeError();
+ if (newValue && (typeof newValue === 'object' || typeof newValue === 'function')) {
+ var then = newValue.then;
+ if (typeof then === 'function') {
+ doResolve(then.bind(newValue), resolve.bind(this), reject.bind(this));
+ return;
+ }
+ }
+ this._state = true;
+ this._value = newValue;
+ finale.call(this);
+ } catch (e) { reject.call(this, e); }
+ }
+
+ function reject(newValue) {
+ this._state = false;
+ this._value = newValue;
+ finale.call(this);
+ }
+
+ function finale() {
+ for (var i = 0, len = this._deferreds.length; i < len; i++) {
+ handle.call(this, this._deferreds[i]);
+ }
+ this._deferreds = null;
+ }
+
+ /**
+ * Take a potentially misbehaving resolver function and make sure
+ * onFulfilled and onRejected are only called once.
+ *
+ * Makes no guarantees about asynchrony.
+ */
+ function doResolve(fn, onFulfilled, onRejected) {
+ var done = false;
+ try {
+ fn(function (value) {
+ if (done) return;
+ done = true;
+ onFulfilled(value);
+ }, function (reason) {
+ if (done) return;
+ done = true;
+ onRejected(reason);
+ })
+ } catch (ex) {
+ if (done) return;
+ done = true;
+ onRejected(ex);
+ }
+ }
+
+ Promise.prototype['catch'] = function (onRejected) {
+ return this.then(null, onRejected);
+ };
+
+ Promise.prototype.then = function(onFulfilled, onRejected) {
+ var me = this;
+ return new Promise(function(resolve, reject) {
+ handle.call(me, {
+ onFulfilled: onFulfilled,
+ onRejected: onRejected,
+ resolve: resolve,
+ reject: reject
+ });
+ })
+ };
+
+ Promise.resolve = function (value) {
+ if (value && typeof value === 'object' && value.constructor === Promise) {
+ return value;
+ }
+
+ return new Promise(function (resolve) {
+ resolve(value);
+ });
+ };
+
+ Promise.reject = function (value) {
+ return new Promise(function (resolve, reject) {
+ reject(value);
+ });
+ };
+
+
+ return Promise;
+}
+
+if (typeof module !== 'undefined') {
+ module.exports = MakePromise;
+}
+

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