work.suroh.tk/node_modules/rx/dist/rx.async.compat.js

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2019-12-02 12:22:45 +00:00
// Copyright (c) Microsoft, All rights reserved. See License.txt in the project root for license information.
;(function (factory) {
var objectTypes = {
'function': true,
'object': true
};
function checkGlobal(value) {
return (value && value.Object === Object) ? value : null;
}
var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType) ? exports : null;
var freeModule = (objectTypes[typeof module] && module && !module.nodeType) ? module : null;
var freeGlobal = checkGlobal(freeExports && freeModule && typeof global === 'object' && global);
var freeSelf = checkGlobal(objectTypes[typeof self] && self);
var freeWindow = checkGlobal(objectTypes[typeof window] && window);
var moduleExports = (freeModule && freeModule.exports === freeExports) ? freeExports : null;
var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
var root = freeGlobal || ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) || freeSelf || thisGlobal || Function('return this')();
// Because of build optimizers
if (typeof define === 'function' && define.amd) {
define(['./rx.binding', 'exports'], function (Rx, exports) {
root.Rx = factory(root, exports, Rx);
return root.Rx;
});
} else if (typeof module === 'object' && module && module.exports === freeExports) {
module.exports = factory(root, module.exports, require('./rx'));
} else {
root.Rx = factory(root, {}, root.Rx);
}
}.call(this, function (root, exp, Rx, undefined) {
// Aliases
var Observable = Rx.Observable,
observableFromPromise = Observable.fromPromise,
observableThrow = Observable.throwError,
AnonymousObservable = Rx.AnonymousObservable,
ObservableBase = Rx.ObservableBase,
AsyncSubject = Rx.AsyncSubject,
disposableCreate = Rx.Disposable.create,
CompositeDisposable = Rx.CompositeDisposable,
immediateScheduler = Rx.Scheduler.immediate,
defaultScheduler = Rx.Scheduler['default'],
inherits = Rx.internals.inherits,
isScheduler = Rx.Scheduler.isScheduler,
isPromise = Rx.helpers.isPromise,
isFunction = Rx.helpers.isFunction,
isIterable = Rx.helpers.isIterable,
isArrayLike = Rx.helpers.isArrayLike;
var errorObj = {e: {}};
function tryCatcherGen(tryCatchTarget) {
return function tryCatcher() {
try {
return tryCatchTarget.apply(this, arguments);
} catch (e) {
errorObj.e = e;
return errorObj;
}
};
}
var tryCatch = Rx.internals.tryCatch = function tryCatch(fn) {
if (!isFunction(fn)) { throw new TypeError('fn must be a function'); }
return tryCatcherGen(fn);
};
function thrower(e) {
throw e;
}
Observable.wrap = function (fn) {
function createObservable() {
return Observable.spawn.call(this, fn.apply(this, arguments));
}
createObservable.__generatorFunction__ = fn;
return createObservable;
};
var spawn = Observable.spawn = function () {
var gen = arguments[0], self = this, args = [];
for (var i = 1, len = arguments.length; i < len; i++) { args.push(arguments[i]); }
return new AnonymousObservable(function (o) {
var g = new CompositeDisposable();
if (isFunction(gen)) { gen = gen.apply(self, args); }
if (!gen || !isFunction(gen.next)) {
o.onNext(gen);
return o.onCompleted();
}
function processGenerator(res) {
var ret = tryCatch(gen.next).call(gen, res);
if (ret === errorObj) { return o.onError(ret.e); }
next(ret);
}
processGenerator();
function onError(err) {
var ret = tryCatch(gen.next).call(gen, err);
if (ret === errorObj) { return o.onError(ret.e); }
next(ret);
}
function next(ret) {
if (ret.done) {
o.onNext(ret.value);
o.onCompleted();
return;
}
var obs = toObservable.call(self, ret.value);
var value = null;
var hasValue = false;
if (Observable.isObservable(obs)) {
g.add(obs.subscribe(function(val) {
hasValue = true;
value = val;
}, onError, function() {
hasValue && processGenerator(value);
}));
} else {
onError(new TypeError('type not supported'));
}
}
return g;
});
};
function toObservable(obj) {
if (!obj) { return obj; }
if (Observable.isObservable(obj)) { return obj; }
if (isPromise(obj)) { return Observable.fromPromise(obj); }
if (isGeneratorFunction(obj) || isGenerator(obj)) { return spawn.call(this, obj); }
if (isFunction(obj)) { return thunkToObservable.call(this, obj); }
if (isArrayLike(obj) || isIterable(obj)) { return arrayToObservable.call(this, obj); }
if (isObject(obj)) {return objectToObservable.call(this, obj);}
return obj;
}
function arrayToObservable (obj) {
return Observable.from(obj).concatMap(function(o) {
if(Observable.isObservable(o) || isObject(o)) {
return toObservable.call(null, o);
} else {
return Rx.Observable.just(o);
}
}).toArray();
}
function objectToObservable (obj) {
var results = new obj.constructor(), keys = Object.keys(obj), observables = [];
for (var i = 0, len = keys.length; i < len; i++) {
var key = keys[i];
var observable = toObservable.call(this, obj[key]);
if(observable && Observable.isObservable(observable)) {
defer(observable, key);
} else {
results[key] = obj[key];
}
}
return Observable.forkJoin.apply(Observable, observables).map(function() {
return results;
});
function defer (observable, key) {
results[key] = undefined;
observables.push(observable.map(function (next) {
results[key] = next;
}));
}
}
function thunkToObservable(fn) {
var self = this;
return new AnonymousObservable(function (o) {
fn.call(self, function () {
var err = arguments[0], res = arguments[1];
if (err) { return o.onError(err); }
if (arguments.length > 2) {
var args = [];
for (var i = 1, len = arguments.length; i < len; i++) { args.push(arguments[i]); }
res = args;
}
o.onNext(res);
o.onCompleted();
});
});
}
function isGenerator(obj) {
return isFunction (obj.next) && isFunction (obj['throw']);
}
function isGeneratorFunction(obj) {
var ctor = obj.constructor;
if (!ctor) { return false; }
if (ctor.name === 'GeneratorFunction' || ctor.displayName === 'GeneratorFunction') { return true; }
return isGenerator(ctor.prototype);
}
function isObject(val) {
return Object == val.constructor;
}
/**
* Invokes the specified function asynchronously on the specified scheduler, surfacing the result through an observable sequence.
*
* @example
* var res = Rx.Observable.start(function () { console.log('hello'); });
* var res = Rx.Observable.start(function () { console.log('hello'); }, Rx.Scheduler.timeout);
* var res = Rx.Observable.start(function () { this.log('hello'); }, Rx.Scheduler.timeout, console);
*
* @param {Function} func Function to run asynchronously.
* @param {Scheduler} [scheduler] Scheduler to run the function on. If not specified, defaults to Scheduler.timeout.
* @param [context] The context for the func parameter to be executed. If not specified, defaults to undefined.
* @returns {Observable} An observable sequence exposing the function's result value, or an exception.
*
* Remarks
* * The function is called immediately, not during the subscription of the resulting sequence.
* * Multiple subscriptions to the resulting sequence can observe the function's result.
*/
Observable.start = function (func, context, scheduler) {
return observableToAsync(func, context, scheduler)();
};
/**
* Converts the function into an asynchronous function. Each invocation of the resulting asynchronous function causes an invocation of the original synchronous function on the specified scheduler.
* @param {Function} function Function to convert to an asynchronous function.
* @param {Scheduler} [scheduler] Scheduler to run the function on. If not specified, defaults to Scheduler.timeout.
* @param {Mixed} [context] The context for the func parameter to be executed. If not specified, defaults to undefined.
* @returns {Function} Asynchronous function.
*/
var observableToAsync = Observable.toAsync = function (func, context, scheduler) {
isScheduler(scheduler) || (scheduler = defaultScheduler);
return function () {
var args = arguments,
subject = new AsyncSubject();
scheduler.schedule(null, function () {
var result;
try {
result = func.apply(context, args);
} catch (e) {
subject.onError(e);
return;
}
subject.onNext(result);
subject.onCompleted();
});
return subject.asObservable();
};
};
function createCbObservable(fn, ctx, selector, args) {
var o = new AsyncSubject();
args.push(createCbHandler(o, ctx, selector));
fn.apply(ctx, args);
return o.asObservable();
}
function createCbHandler(o, ctx, selector) {
return function handler () {
var len = arguments.length, results = new Array(len);
for(var i = 0; i < len; i++) { results[i] = arguments[i]; }
if (isFunction(selector)) {
results = tryCatch(selector).apply(ctx, results);
if (results === errorObj) { return o.onError(results.e); }
o.onNext(results);
} else {
if (results.length <= 1) {
o.onNext(results[0]);
} else {
o.onNext(results);
}
}
o.onCompleted();
};
}
/**
* Converts a callback function to an observable sequence.
*
* @param {Function} fn Function with a callback as the last parameter to convert to an Observable sequence.
* @param {Mixed} [ctx] The context for the func parameter to be executed. If not specified, defaults to undefined.
* @param {Function} [selector] A selector which takes the arguments from the callback to produce a single item to yield on next.
* @returns {Function} A function, when executed with the required parameters minus the callback, produces an Observable sequence with a single value of the arguments to the callback as an array.
*/
Observable.fromCallback = function (fn, ctx, selector) {
return function () {
typeof ctx === 'undefined' && (ctx = this);
var len = arguments.length, args = new Array(len)
for(var i = 0; i < len; i++) { args[i] = arguments[i]; }
return createCbObservable(fn, ctx, selector, args);
};
};
function createNodeObservable(fn, ctx, selector, args) {
var o = new AsyncSubject();
args.push(createNodeHandler(o, ctx, selector));
fn.apply(ctx, args);
return o.asObservable();
}
function createNodeHandler(o, ctx, selector) {
return function handler () {
var err = arguments[0];
if (err) { return o.onError(err); }
var len = arguments.length, results = [];
for(var i = 1; i < len; i++) { results[i - 1] = arguments[i]; }
if (isFunction(selector)) {
var results = tryCatch(selector).apply(ctx, results);
if (results === errorObj) { return o.onError(results.e); }
o.onNext(results);
} else {
if (results.length <= 1) {
o.onNext(results[0]);
} else {
o.onNext(results);
}
}
o.onCompleted();
};
}
/**
* Converts a Node.js callback style function to an observable sequence. This must be in function (err, ...) format.
* @param {Function} fn The function to call
* @param {Mixed} [ctx] The context for the func parameter to be executed. If not specified, defaults to undefined.
* @param {Function} [selector] A selector which takes the arguments from the callback minus the error to produce a single item to yield on next.
* @returns {Function} An async function which when applied, returns an observable sequence with the callback arguments as an array.
*/
Observable.fromNodeCallback = function (fn, ctx, selector) {
return function () {
typeof ctx === 'undefined' && (ctx = this);
var len = arguments.length, args = new Array(len);
for(var i = 0; i < len; i++) { args[i] = arguments[i]; }
return createNodeObservable(fn, ctx, selector, args);
};
};
function isNodeList(el) {
if (root.StaticNodeList) {
// IE8 Specific
// instanceof is slower than Object#toString, but Object#toString will not work as intended in IE8
return el instanceof root.StaticNodeList || el instanceof root.NodeList;
} else {
return Object.prototype.toString.call(el) === '[object NodeList]';
}
}
function ListenDisposable(e, n, fn) {
this._e = e;
this._n = n;
this._fn = fn;
this._e.addEventListener(this._n, this._fn, false);
this.isDisposed = false;
}
ListenDisposable.prototype.dispose = function () {
if (!this.isDisposed) {
this._e.removeEventListener(this._n, this._fn, false);
this.isDisposed = true;
}
};
function createEventListener (el, eventName, handler) {
var disposables = new CompositeDisposable();
// Asume NodeList or HTMLCollection
var elemToString = Object.prototype.toString.call(el);
if (isNodeList(el) || elemToString === '[object HTMLCollection]') {
for (var i = 0, len = el.length; i < len; i++) {
disposables.add(createEventListener(el.item(i), eventName, handler));
}
} else if (el) {
disposables.add(new ListenDisposable(el, eventName, handler));
}
return disposables;
}
/**
* Configuration option to determine whether to use native events only
*/
Rx.config.useNativeEvents = false;
var EventObservable = (function(__super__) {
inherits(EventObservable, __super__);
function EventObservable(el, name, fn) {
this._el = el;
this._n = name;
this._fn = fn;
__super__.call(this);
}
function createHandler(o, fn) {
return function handler () {
var results = arguments[0];
if (isFunction(fn)) {
results = tryCatch(fn).apply(null, arguments);
if (results === errorObj) { return o.onError(results.e); }
}
o.onNext(results);
};
}
EventObservable.prototype.subscribeCore = function (o) {
return createEventListener(
this._el,
this._n,
createHandler(o, this._fn));
};
return EventObservable;
}(ObservableBase));
/**
* Creates an observable sequence by adding an event listener to the matching DOMElement or each item in the NodeList.
* @param {Object} element The DOMElement or NodeList to attach a listener.
* @param {String} eventName The event name to attach the observable sequence.
* @param {Function} [selector] A selector which takes the arguments from the event handler to produce a single item to yield on next.
* @returns {Observable} An observable sequence of events from the specified element and the specified event.
*/
Observable.fromEvent = function (element, eventName, selector) {
// Node.js specific
if (element.addListener) {
return fromEventPattern(
function (h) { element.addListener(eventName, h); },
function (h) { element.removeListener(eventName, h); },
selector);
}
// Use only if non-native events are allowed
if (!Rx.config.useNativeEvents) {
// Handles jq, Angular.js, Zepto, Marionette, Ember.js
if (typeof element.on === 'function' && typeof element.off === 'function') {
return fromEventPattern(
function (h) { element.on(eventName, h); },
function (h) { element.off(eventName, h); },
selector);
}
}
return new EventObservable(element, eventName, selector).publish().refCount();
};
var EventPatternObservable = (function(__super__) {
inherits(EventPatternObservable, __super__);
function EventPatternObservable(add, del, fn) {
this._add = add;
this._del = del;
this._fn = fn;
__super__.call(this);
}
function createHandler(o, fn) {
return function handler () {
var results = arguments[0];
if (isFunction(fn)) {
results = tryCatch(fn).apply(null, arguments);
if (results === errorObj) { return o.onError(results.e); }
}
o.onNext(results);
};
}
EventPatternObservable.prototype.subscribeCore = function (o) {
var fn = createHandler(o, this._fn);
var returnValue = this._add(fn);
return new EventPatternDisposable(this._del, fn, returnValue);
};
function EventPatternDisposable(del, fn, ret) {
this._del = del;
this._fn = fn;
this._ret = ret;
this.isDisposed = false;
}
EventPatternDisposable.prototype.dispose = function () {
if(!this.isDisposed) {
isFunction(this._del) && this._del(this._fn, this._ret);
this.isDisposed = true;
}
};
return EventPatternObservable;
}(ObservableBase));
/**
* Creates an observable sequence from an event emitter via an addHandler/removeHandler pair.
* @param {Function} addHandler The function to add a handler to the emitter.
* @param {Function} [removeHandler] The optional function to remove a handler from an emitter.
* @param {Function} [selector] A selector which takes the arguments from the event handler to produce a single item to yield on next.
* @returns {Observable} An observable sequence which wraps an event from an event emitter
*/
var fromEventPattern = Observable.fromEventPattern = function (addHandler, removeHandler, selector) {
return new EventPatternObservable(addHandler, removeHandler, selector).publish().refCount();
};
/**
* Invokes the asynchronous function, surfacing the result through an observable sequence.
* @param {Function} functionAsync Asynchronous function which returns a Promise to run.
* @returns {Observable} An observable sequence exposing the function's result value, or an exception.
*/
Observable.startAsync = function (functionAsync) {
var promise = tryCatch(functionAsync)();
if (promise === errorObj) { return observableThrow(promise.e); }
return observableFromPromise(promise);
};
return Rx;
}));