--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui3-3.15.0/build/promise/promise.js Mon Mar 10 15:19:48 2014 +0100
@@ -0,0 +1,616 @@
+YUI.add('promise', function (Y, NAME) {
+
+/**
+Wraps the execution of asynchronous operations, providing a promise object that
+can be used to subscribe to the various ways the operation may terminate.
+
+When the operation completes successfully, call the Resolver's `resolve()`
+method, passing any relevant response data for subscribers. If the operation
+encounters an error or is unsuccessful in some way, call `reject()`, again
+passing any relevant data for subscribers.
+
+The Resolver object should be shared only with the code resposible for
+resolving or rejecting it. Public access for the Resolver is through its
+_promise_, which is returned from the Resolver's `promise` property. While both
+Resolver and promise allow subscriptions to the Resolver's state changes, the
+promise may be exposed to non-controlling code. It is the preferable interface
+for adding subscriptions.
+
+Subscribe to state changes in the Resolver with the promise's
+`then(callback, errback)` method. `then()` wraps the passed callbacks in a
+new Resolver and returns the corresponding promise, allowing chaining of
+asynchronous or synchronous operations. E.g.
+`promise.then(someAsyncFunc).then(anotherAsyncFunc)`
+
+@module promise
+@since 3.9.0
+**/
+
+var Lang = Y.Lang,
+ slice = [].slice;
+
+/**
+A promise represents a value that may not yet be available. Promises allow
+you to chain asynchronous operations, write synchronous looking code and
+handle errors throughout the process.
+
+This constructor takes a function as a parameter where you can insert the logic
+that fulfills or rejects this promise. The fulfillment value and the rejection
+reason can be any JavaScript value. It's encouraged that rejection reasons be
+error objects
+
+<pre><code>
+var fulfilled = new Y.Promise(function (resolve) {
+ resolve('I am a fulfilled promise');
+});
+
+var rejected = new Y.Promise(function (resolve, reject) {
+ reject(new Error('I am a rejected promise'));
+});
+</code></pre>
+
+@class Promise
+@constructor
+@param {Function} fn A function where to insert the logic that resolves this
+ promise. Receives `resolve` and `reject` functions as parameters.
+ This function is called synchronously.
+**/
+function Promise(fn) {
+ if (!(this instanceof Promise)) {
+ return new Promise(fn);
+ }
+
+ var resolver = new Promise.Resolver(this);
+
+ /**
+ A reference to the resolver object that handles this promise
+
+ @property _resolver
+ @type Object
+ @private
+ */
+ this._resolver = resolver;
+
+ fn.call(this, function (value) {
+ resolver.resolve(value);
+ }, function (reason) {
+ resolver.reject(reason);
+ });
+}
+
+Y.mix(Promise.prototype, {
+ /**
+ Schedule execution of a callback to either or both of "fulfill" and
+ "reject" resolutions for this promise. The callbacks are wrapped in a new
+ promise and that promise is returned. This allows operation chaining ala
+ `functionA().then(functionB).then(functionC)` where `functionA` returns
+ a promise, and `functionB` and `functionC` _may_ return promises.
+
+ Asynchronicity of the callbacks is guaranteed.
+
+ @method then
+ @param {Function} [callback] function to execute if the promise
+ resolves successfully
+ @param {Function} [errback] function to execute if the promise
+ resolves unsuccessfully
+ @return {Promise} A promise wrapping the resolution of either "resolve" or
+ "reject" callback
+ **/
+ then: function (callback, errback) {
+ var Constructor = this.constructor,
+ resolver = this._resolver;
+
+ // using this.constructor allows for customized promises to be
+ // returned instead of plain ones
+ return new Constructor(function (resolve, reject) {
+ resolver._addCallbacks(
+ // Check if callbacks are functions. If not, default to
+ // `resolve` and `reject` respectively.
+ // The wrapping of the callbacks is done here and not in
+ // `_addCallbacks` because it is a feature specific to `then`.
+ // If `done` is added to promises it would call `_addCallbacks`
+ // without defaulting to anything and without wrapping
+ typeof callback === 'function' ?
+ Promise._wrap(resolve, reject, callback) : resolve,
+ typeof errback === 'function' ?
+ Promise._wrap(resolve, reject, errback) : reject
+ );
+ });
+ },
+
+ /*
+ A shorthand for `promise.then(undefined, callback)`.
+
+ Returns a new promise and the error callback gets the same treatment as in
+ `then`: errors get caught and turned into rejections, and the return value
+ of the callback becomes the fulfilled value of the returned promise.
+
+ @method catch
+ @param [Function] errback Callback to be called in case this promise is
+ rejected
+ @return {Promise} A new promise modified by the behavior of the error
+ callback
+ */
+ 'catch': function (errback) {
+ return this.then(undefined, errback);
+ },
+
+ /**
+ Returns the current status of the operation. Possible results are
+ "pending", "fulfilled", and "rejected".
+
+ @method getStatus
+ @return {String}
+ @deprecated
+ **/
+ getStatus: function () {
+ return this._resolver.getStatus();
+ }
+});
+
+/**
+Wraps the callback in another function to catch exceptions and turn them into
+rejections.
+
+@method _wrap
+@param {Function} resolve Resolving function of the resolver that
+ handles this promise
+@param {Function} reject Rejection function of the resolver that
+ handles this promise
+@param {Function} fn Callback to wrap
+@return {Function}
+@private
+**/
+Promise._wrap = function (resolve, reject, fn) {
+ // callbacks and errbacks only get one argument
+ return function (valueOrReason) {
+ var result;
+
+ // Promises model exception handling through callbacks
+ // making both synchronous and asynchronous errors behave
+ // the same way
+ try {
+ // Use the argument coming in to the callback/errback from the
+ // resolution of the parent promise.
+ // The function must be called as a normal function, with no
+ // special value for |this|, as per Promises A+
+ result = fn(valueOrReason);
+ } catch (e) {
+ reject(e);
+ return;
+ }
+
+ resolve(result);
+ };
+};
+
+/**
+Checks if an object or value is a promise. This is cross-implementation
+compatible, so promises returned from other libraries or native components
+that are compatible with the Promises A+ spec should be recognized by this
+method.
+
+@method isPromise
+@param {Any} obj The object to test
+@return {Boolean} Whether the object is a promise or not
+@static
+**/
+Promise.isPromise = function (obj) {
+ var then;
+ // We test promises by structure to be able to identify other
+ // implementations' promises. This is important for cross compatibility and
+ // In particular Y.when which should recognize any kind of promise
+ // Use try...catch when retrieving obj.then. Return false if it throws
+ // See Promises/A+ 1.1
+ try {
+ then = obj.then;
+ } catch (_) {}
+ return typeof then === 'function';
+};
+
+/*
+Ensures that a certain value is a promise. If it is not a promise, it wraps it
+in one.
+
+This method can be copied or inherited in subclasses. In that case it will
+check that the value passed to it is an instance of the correct class.
+This means that `PromiseSubclass.resolve()` will always return instances of
+`PromiseSubclass`.
+
+@method resolve
+@param {Any} Any object that may or may not be a promise
+@return {Promise}
+@static
+*/
+Promise.resolve = function (value) {
+ return Promise.isPromise(value) && value.constructor === this ? value :
+ /*jshint newcap: false */
+ new this(function (resolve) {
+ /*jshint newcap: true */
+ resolve(value);
+ });
+};
+
+/*
+A shorthand for creating a rejected promise.
+
+@method reject
+@param {Any} reason Reason for the rejection of this promise. Usually an Error
+ Object
+@return {Promise} A rejected promise
+@static
+*/
+Promise.reject = function (reason) {
+ /*jshint newcap: false */
+ return new this(function (resolve, reject) {
+ /*jshint newcap: true */
+ reject(reason);
+ });
+};
+
+/*
+Returns a promise that is resolved or rejected when all values are resolved or
+any is rejected. This is useful for waiting for the resolution of multiple
+promises, such as reading multiple files in Node.js or making multiple XHR
+requests in the browser.
+
+@method all
+@param {Any[]} values An array of any kind of values, promises or not. If a value is not
+@return [Promise] A promise for an array of all the fulfillment values
+@static
+*/
+Promise.all = function (values) {
+ var Promise = this;
+ return new Promise(function (resolve, reject) {
+ if (!Lang.isArray(values)) {
+ reject(new TypeError('Promise.all expects an array of values or promises'));
+ return;
+ }
+
+ var remaining = values.length,
+ i = 0,
+ length = values.length,
+ results = [];
+
+ function oneDone(index) {
+ return function (value) {
+ results[index] = value;
+
+ remaining--;
+
+ if (!remaining) {
+ resolve(results);
+ }
+ };
+ }
+
+ if (length < 1) {
+ return resolve(results);
+ }
+
+ for (; i < length; i++) {
+ Promise.resolve(values[i]).then(oneDone(i), reject);
+ }
+ });
+};
+
+/*
+Returns a promise that is resolved or rejected when any of values is either
+resolved or rejected. Can be used for providing early feedback in the UI
+while other operations are still pending.
+
+@method race
+@param {Any[]} values An array of values or promises
+@return {Promise}
+@static
+*/
+Promise.race = function (values) {
+ var Promise = this;
+ return new Promise(function (resolve, reject) {
+ if (!Lang.isArray(values)) {
+ reject(new TypeError('Promise.race expects an array of values or promises'));
+ return;
+ }
+
+ // just go through the list and resolve and reject at the first change
+ // This abuses the fact that calling resolve/reject multiple times
+ // doesn't change the state of the returned promise
+ for (var i = 0, count = values.length; i < count; i++) {
+ Promise.resolve(values[i]).then(resolve, reject);
+ }
+ });
+};
+
+Y.Promise = Promise;
+/**
+Represents an asynchronous operation. Provides a
+standard API for subscribing to the moment that the operation completes either
+successfully (`fulfill()`) or unsuccessfully (`reject()`).
+
+@class Promise.Resolver
+@constructor
+@param {Promise} promise The promise instance this resolver will be handling
+**/
+function Resolver(promise) {
+ /**
+ List of success callbacks
+
+ @property _callbacks
+ @type Array
+ @private
+ **/
+ this._callbacks = [];
+
+ /**
+ List of failure callbacks
+
+ @property _errbacks
+ @type Array
+ @private
+ **/
+ this._errbacks = [];
+
+ /**
+ The promise for this Resolver.
+
+ @property promise
+ @type Promise
+ @deprecated
+ **/
+ this.promise = promise;
+
+ /**
+ The status of the operation. This property may take only one of the following
+ values: 'pending', 'fulfilled' or 'rejected'.
+
+ @property _status
+ @type String
+ @default 'pending'
+ @private
+ **/
+ this._status = 'pending';
+
+ /**
+ This value that this promise represents.
+
+ @property _result
+ @type Any
+ @private
+ **/
+ this._result = null;
+}
+
+Y.mix(Resolver.prototype, {
+ /**
+ Resolves the promise, signaling successful completion of the
+ represented operation. All "onFulfilled" subscriptions are executed and passed
+ the value provided to this method. After calling `fulfill()`, `reject()` and
+ `notify()` are disabled.
+
+ @method fulfill
+ @param {Any} value Value to pass along to the "onFulfilled" subscribers
+ **/
+ fulfill: function (value) {
+ if (this._status === 'pending') {
+ this._result = value;
+ this._status = 'fulfilled';
+ }
+
+ if (this._status === 'fulfilled') {
+ this._notify(this._callbacks, this._result);
+
+ // Reset the callback list so that future calls to fulfill()
+ // won't call the same callbacks again. Promises keep a list
+ // of callbacks, they're not the same as events. In practice,
+ // calls to fulfill() after the first one should not be made by
+ // the user but by then()
+ this._callbacks = [];
+
+ // Once a promise gets fulfilled it can't be rejected, so
+ // there is no point in keeping the list. Remove it to help
+ // garbage collection
+ this._errbacks = null;
+ }
+ },
+
+ /**
+ Resolves the promise, signaling *un*successful completion of the
+ represented operation. All "onRejected" subscriptions are executed with
+ the value provided to this method. After calling `reject()`, `resolve()`
+ and `notify()` are disabled.
+
+ @method reject
+ @param {Any} value Value to pass along to the "reject" subscribers
+ **/
+ reject: function (reason) {
+ if (this._status === 'pending') {
+ this._result = reason;
+ this._status = 'rejected';
+ }
+
+ if (this._status === 'rejected') {
+ this._notify(this._errbacks, this._result);
+
+ // See fulfill()
+ this._callbacks = null;
+ this._errbacks = [];
+ }
+ },
+
+ /*
+ Given a certain value A passed as a parameter, this method resolves the
+ promise to the value A.
+
+ If A is a promise, `resolve` will cause the resolver to adopt the state of A
+ and once A is resolved, it will resolve the resolver's promise as well.
+ This behavior "flattens" A by calling `then` recursively and essentially
+ disallows promises-for-promises.
+
+ This is the default algorithm used when using the function passed as the
+ first argument to the promise initialization function. This means that
+ the following code returns a promise for the value 'hello world':
+
+ var promise1 = new Y.Promise(function (resolve) {
+ resolve('hello world');
+ });
+ var promise2 = new Y.Promise(function (resolve) {
+ resolve(promise1);
+ });
+ promise2.then(function (value) {
+ assert(value === 'hello world'); // true
+ });
+
+ @method resolve
+ @param [Any] value A regular JS value or a promise
+ */
+ resolve: function (value) {
+ var self = this;
+
+ if (Promise.isPromise(value)) {
+ value.then(function (value) {
+ self.resolve(value);
+ }, function (reason) {
+ self.reject(reason);
+ });
+ } else {
+ this.fulfill(value);
+ }
+ },
+
+ /**
+ Schedule execution of a callback to either or both of "resolve" and
+ "reject" resolutions for the Resolver. The callbacks
+ are wrapped in a new Resolver and that Resolver's corresponding promise
+ is returned. This allows operation chaining ala
+ `functionA().then(functionB).then(functionC)` where `functionA` returns
+ a promise, and `functionB` and `functionC` _may_ return promises.
+
+ @method then
+ @param {Function} [callback] function to execute if the Resolver
+ resolves successfully
+ @param {Function} [errback] function to execute if the Resolver
+ resolves unsuccessfully
+ @return {Promise} The promise of a new Resolver wrapping the resolution
+ of either "resolve" or "reject" callback
+ @deprecated
+ **/
+ then: function (callback, errback) {
+ return this.promise.then(callback, errback);
+ },
+
+ /**
+ Schedule execution of a callback to either or both of "resolve" and
+ "reject" resolutions of this resolver. If the resolver is not pending,
+ the correct callback gets called automatically.
+
+ @method _addCallbacks
+ @param {Function} [callback] function to execute if the Resolver
+ resolves successfully
+ @param {Function} [errback] function to execute if the Resolver
+ resolves unsuccessfully
+ @private
+ **/
+ _addCallbacks: function (callback, errback) {
+ var callbackList = this._callbacks,
+ errbackList = this._errbacks,
+ status = this._status,
+ result = this._result;
+
+ if (callbackList && typeof callback === 'function') {
+ callbackList.push(callback);
+ }
+ if (errbackList && typeof errback === 'function') {
+ errbackList.push(errback);
+ }
+
+ // If a promise is already fulfilled or rejected, notify the newly added
+ // callbacks by calling fulfill() or reject()
+ if (status === 'fulfilled') {
+ this.fulfill(result);
+ } else if (status === 'rejected') {
+ this.reject(result);
+ }
+ },
+
+ /**
+ Returns the current status of the Resolver as a string "pending",
+ "fulfilled", or "rejected".
+
+ @method getStatus
+ @return {String}
+ @deprecated
+ **/
+ getStatus: function () {
+ return this._status;
+ },
+
+ /**
+ Executes an array of callbacks from a specified context, passing a set of
+ arguments.
+
+ @method _notify
+ @param {Function[]} subs The array of subscriber callbacks
+ @param {Any} result Value to pass the callbacks
+ @protected
+ **/
+ _notify: function (subs, result) {
+ // Since callback lists are reset synchronously, the subs list never
+ // changes after _notify() receives it. Avoid calling Y.soon() for
+ // an empty list
+ if (subs.length) {
+ // Calling all callbacks after Y.soon to guarantee
+ // asynchronicity. Because setTimeout can cause unnecessary
+ // delays that *can* become noticeable in some situations
+ // (especially in Node.js)
+ Y.soon(function () {
+ var i, len;
+
+ for (i = 0, len = subs.length; i < len; ++i) {
+ subs[i](result);
+ }
+ });
+ }
+ }
+
+}, true);
+
+Y.Promise.Resolver = Resolver;
+/**
+Abstraction API allowing you to interact with promises or raw values as if they
+were promises. If a non-promise object is passed in, a new Resolver is created
+and scheduled to resolve asynchronously with the provided value.
+
+In either case, a promise is returned. If either _callback_ or _errback_ are
+provided, the promise returned is the one returned from calling
+`promise.then(callback, errback)` on the provided or created promise. If neither
+are provided, the original promise is returned.
+
+@for YUI
+@method when
+@param {Any} promise Promise object or value to wrap in a resolved promise
+@param {Function} [callback] callback to execute if the promise is resolved
+@param {Function} [errback] callback to execute if the promise is rejected
+@return {Promise}
+**/
+Y.when = function (promise, callback, errback) {
+ promise = Promise.resolve(promise);
+
+ return (callback || errback) ? promise.then(callback, errback) : promise;
+};
+/**
+Returns a new promise that will be resolved when all operations have completed.
+Takes both any numer of values as arguments. If an argument is a not a promise,
+it will be wrapped in a new promise, same as in `Y.when()`.
+
+@for YUI
+@method batch
+@param {Any} operation* Any number of Y.Promise objects or regular JS values
+@return {Promise} Promise to be fulfilled when all provided promises are
+ resolved
+**/
+Y.batch = function () {
+ return Promise.all(slice.call(arguments));
+};
+
+
+}, '@VERSION@', {"requires": ["timers"]});