126 lines
4.0 KiB
JavaScript
126 lines
4.0 KiB
JavaScript
|
import { Observable } from '../Observable';
|
||
|
|
import { isScheduler } from '../util/isScheduler';
|
||
|
|
const selfSelector = (value) => value;
|
||
|
|
/**
|
||
|
|
* We need this JSDoc comment for affecting ESDoc.
|
||
|
|
* @extends {Ignored}
|
||
|
|
* @hide true
|
||
|
|
*/
|
||
|
|
export class GenerateObservable extends Observable {
|
||
|
|
constructor(initialState, condition, iterate, resultSelector, scheduler) {
|
||
|
|
super();
|
||
|
|
this.initialState = initialState;
|
||
|
|
this.condition = condition;
|
||
|
|
this.iterate = iterate;
|
||
|
|
this.resultSelector = resultSelector;
|
||
|
|
this.scheduler = scheduler;
|
||
|
|
}
|
||
|
|
static create(initialStateOrOptions, condition, iterate, resultSelectorOrObservable, scheduler) {
|
||
|
|
if (arguments.length == 1) {
|
||
|
|
return new GenerateObservable(initialStateOrOptions.initialState, initialStateOrOptions.condition, initialStateOrOptions.iterate, initialStateOrOptions.resultSelector || selfSelector, initialStateOrOptions.scheduler);
|
||
|
|
}
|
||
|
|
if (resultSelectorOrObservable === undefined || isScheduler(resultSelectorOrObservable)) {
|
||
|
|
return new GenerateObservable(initialStateOrOptions, condition, iterate, selfSelector, resultSelectorOrObservable);
|
||
|
|
}
|
||
|
|
return new GenerateObservable(initialStateOrOptions, condition, iterate, resultSelectorOrObservable, scheduler);
|
||
|
|
}
|
||
|
|
/** @deprecated internal use only */ _subscribe(subscriber) {
|
||
|
|
let state = this.initialState;
|
||
|
|
if (this.scheduler) {
|
||
|
|
return this.scheduler.schedule(GenerateObservable.dispatch, 0, {
|
||
|
|
subscriber,
|
||
|
|
iterate: this.iterate,
|
||
|
|
condition: this.condition,
|
||
|
|
resultSelector: this.resultSelector,
|
||
|
|
state });
|
||
|
|
}
|
||
|
|
const { condition, resultSelector, iterate } = this;
|
||
|
|
do {
|
||
|
|
if (condition) {
|
||
|
|
let conditionResult;
|
||
|
|
try {
|
||
|
|
conditionResult = condition(state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (!conditionResult) {
|
||
|
|
subscriber.complete();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
let value;
|
||
|
|
try {
|
||
|
|
value = resultSelector(state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
subscriber.next(value);
|
||
|
|
if (subscriber.closed) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
state = iterate(state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
} while (true);
|
||
|
|
}
|
||
|
|
static dispatch(state) {
|
||
|
|
const { subscriber, condition } = state;
|
||
|
|
if (subscriber.closed) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (state.needIterate) {
|
||
|
|
try {
|
||
|
|
state.state = state.iterate(state.state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
state.needIterate = true;
|
||
|
|
}
|
||
|
|
if (condition) {
|
||
|
|
let conditionResult;
|
||
|
|
try {
|
||
|
|
conditionResult = condition(state.state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (!conditionResult) {
|
||
|
|
subscriber.complete();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (subscriber.closed) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
let value;
|
||
|
|
try {
|
||
|
|
value = state.resultSelector(state.state);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
subscriber.error(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (subscriber.closed) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
subscriber.next(value);
|
||
|
|
if (subscriber.closed) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
return this.schedule(state);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=GenerateObservable.js.map
|