work.suroh.tk/node_modules/rx/dist/rx.joinpatterns.js

344 lines
11 KiB
JavaScript

// 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'], function (Rx, exports) {
return factory(root, exports, 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,
observableProto = Observable.prototype,
AnonymousObservable = Rx.AnonymousObservable,
observableThrow = Observable.throwError,
observerCreate = Rx.Observer.create,
SingleAssignmentDisposable = Rx.SingleAssignmentDisposable,
CompositeDisposable = Rx.CompositeDisposable,
AbstractObserver = Rx.internals.AbstractObserver,
noop = Rx.helpers.noop,
inherits = Rx.internals.inherits,
isFunction = Rx.helpers.isFunction;
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;
}
var Map = root.Map || (function () {
function Map() {
this.size = 0;
this._values = [];
this._keys = [];
}
Map.prototype['delete'] = function (key) {
var i = this._keys.indexOf(key);
if (i === -1) { return false; }
this._values.splice(i, 1);
this._keys.splice(i, 1);
this.size--;
return true;
};
Map.prototype.get = function (key) {
var i = this._keys.indexOf(key);
return i === -1 ? undefined : this._values[i];
};
Map.prototype.set = function (key, value) {
var i = this._keys.indexOf(key);
if (i === -1) {
this._keys.push(key);
this._values.push(value);
this.size++;
} else {
this._values[i] = value;
}
return this;
};
Map.prototype.forEach = function (cb, thisArg) {
for (var i = 0; i < this.size; i++) {
cb.call(thisArg, this._values[i], this._keys[i]);
}
};
return Map;
}());
/**
* @constructor
* Represents a join pattern over observable sequences.
*/
function Pattern(patterns) {
this.patterns = patterns;
}
/**
* Creates a pattern that matches the current plan matches and when the specified observable sequences has an available value.
* @param other Observable sequence to match in addition to the current pattern.
* @return {Pattern} Pattern object that matches when all observable sequences in the pattern have an available value.
*/
Pattern.prototype.and = function (other) {
return new Pattern(this.patterns.concat(other));
};
/**
* Matches when all observable sequences in the pattern (specified using a chain of and operators) have an available value and projects the values.
* @param {Function} selector Selector that will be invoked with available values from the source sequences, in the same order of the sequences in the pattern.
* @return {Plan} Plan that produces the projected values, to be fed (with other plans) to the when operator.
*/
Pattern.prototype.thenDo = function (selector) {
return new Plan(this, selector);
};
function Plan(expression, selector) {
this.expression = expression;
this.selector = selector;
}
function handleOnError(o) { return function (e) { o.onError(e); }; }
function handleOnNext(self, observer) {
return function onNext () {
var result = tryCatch(self.selector).apply(self, arguments);
if (result === errorObj) { return observer.onError(result.e); }
observer.onNext(result);
};
}
Plan.prototype.activate = function (externalSubscriptions, observer, deactivate) {
var joinObservers = [], errHandler = handleOnError(observer);
for (var i = 0, len = this.expression.patterns.length; i < len; i++) {
joinObservers.push(planCreateObserver(externalSubscriptions, this.expression.patterns[i], errHandler));
}
var activePlan = new ActivePlan(joinObservers, handleOnNext(this, observer), function () {
for (var j = 0, jlen = joinObservers.length; j < jlen; j++) {
joinObservers[j].removeActivePlan(activePlan);
}
deactivate(activePlan);
});
for (i = 0, len = joinObservers.length; i < len; i++) {
joinObservers[i].addActivePlan(activePlan);
}
return activePlan;
};
function planCreateObserver(externalSubscriptions, observable, onError) {
var entry = externalSubscriptions.get(observable);
if (!entry) {
var observer = new JoinObserver(observable, onError);
externalSubscriptions.set(observable, observer);
return observer;
}
return entry;
}
function ActivePlan(joinObserverArray, onNext, onCompleted) {
this.joinObserverArray = joinObserverArray;
this.onNext = onNext;
this.onCompleted = onCompleted;
this.joinObservers = new Map();
for (var i = 0, len = this.joinObserverArray.length; i < len; i++) {
var joinObserver = this.joinObserverArray[i];
this.joinObservers.set(joinObserver, joinObserver);
}
}
ActivePlan.prototype.dequeue = function () {
this.joinObservers.forEach(function (v) { v.queue.shift(); });
};
ActivePlan.prototype.match = function () {
var i, len, hasValues = true;
for (i = 0, len = this.joinObserverArray.length; i < len; i++) {
if (this.joinObserverArray[i].queue.length === 0) {
hasValues = false;
break;
}
}
if (hasValues) {
var firstValues = [],
isCompleted = false;
for (i = 0, len = this.joinObserverArray.length; i < len; i++) {
firstValues.push(this.joinObserverArray[i].queue[0]);
this.joinObserverArray[i].queue[0].kind === 'C' && (isCompleted = true);
}
if (isCompleted) {
this.onCompleted();
} else {
this.dequeue();
var values = [];
for (i = 0, len = firstValues.length; i < firstValues.length; i++) {
values.push(firstValues[i].value);
}
this.onNext.apply(this, values);
}
}
};
var JoinObserver = (function (__super__) {
inherits(JoinObserver, __super__);
function JoinObserver(source, onError) {
__super__.call(this);
this.source = source;
this.onError = onError;
this.queue = [];
this.activePlans = [];
this.subscription = new SingleAssignmentDisposable();
this.isDisposed = false;
}
var JoinObserverPrototype = JoinObserver.prototype;
JoinObserverPrototype.next = function (notification) {
if (!this.isDisposed) {
if (notification.kind === 'E') {
return this.onError(notification.error);
}
this.queue.push(notification);
var activePlans = this.activePlans.slice(0);
for (var i = 0, len = activePlans.length; i < len; i++) {
activePlans[i].match();
}
}
};
JoinObserverPrototype.error = noop;
JoinObserverPrototype.completed = noop;
JoinObserverPrototype.addActivePlan = function (activePlan) {
this.activePlans.push(activePlan);
};
JoinObserverPrototype.subscribe = function () {
this.subscription.setDisposable(this.source.materialize().subscribe(this));
};
JoinObserverPrototype.removeActivePlan = function (activePlan) {
this.activePlans.splice(this.activePlans.indexOf(activePlan), 1);
this.activePlans.length === 0 && this.dispose();
};
JoinObserverPrototype.dispose = function () {
__super__.prototype.dispose.call(this);
if (!this.isDisposed) {
this.isDisposed = true;
this.subscription.dispose();
}
};
return JoinObserver;
} (AbstractObserver));
/**
* Creates a pattern that matches when both observable sequences have an available value.
*
* @param right Observable sequence to match with the current sequence.
* @return {Pattern} Pattern object that matches when both observable sequences have an available value.
*/
observableProto.and = function (right) {
return new Pattern([this, right]);
};
/**
* Matches when the observable sequence has an available value and projects the value.
*
* @param {Function} selector Selector that will be invoked for values in the source sequence.
* @returns {Plan} Plan that produces the projected values, to be fed (with other plans) to the when operator.
*/
observableProto.thenDo = function (selector) {
return new Pattern([this]).thenDo(selector);
};
/**
* Joins together the results from several patterns.
*
* @param plans A series of plans (specified as an Array of as a series of arguments) created by use of the Then operator on patterns.
* @returns {Observable} Observable sequence with the results form matching several patterns.
*/
Observable.when = function () {
var len = arguments.length, plans;
if (Array.isArray(arguments[0])) {
plans = arguments[0];
} else {
plans = new Array(len);
for(var i = 0; i < len; i++) { plans[i] = arguments[i]; }
}
return new AnonymousObservable(function (o) {
var activePlans = [],
externalSubscriptions = new Map();
var outObserver = observerCreate(
function (x) { o.onNext(x); },
function (err) {
externalSubscriptions.forEach(function (v) { v.onError(err); });
o.onError(err);
},
function (x) { o.onCompleted(); }
);
try {
for (var i = 0, len = plans.length; i < len; i++) {
activePlans.push(plans[i].activate(externalSubscriptions, outObserver, function (activePlan) {
var idx = activePlans.indexOf(activePlan);
activePlans.splice(idx, 1);
activePlans.length === 0 && o.onCompleted();
}));
}
} catch (e) {
return observableThrow(e).subscribe(o);
}
var group = new CompositeDisposable();
externalSubscriptions.forEach(function (joinObserver) {
joinObserver.subscribe();
group.add(joinObserver);
});
return group;
});
};
return Rx;
}));