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keksAccountGUI/node_modulesOLD/rxjs/_esm5/internal/observable/generate.js
2019-08-11 20:48:02 +02:00

125 lines
3.6 KiB
JavaScript

/** PURE_IMPORTS_START _Observable,_util_identity,_util_isScheduler PURE_IMPORTS_END */
import { Observable } from '../Observable';
import { identity } from '../util/identity';
import { isScheduler } from '../util/isScheduler';
export function generate(initialStateOrOptions, condition, iterate, resultSelectorOrObservable, scheduler) {
var resultSelector;
var initialState;
if (arguments.length == 1) {
var options = initialStateOrOptions;
initialState = options.initialState;
condition = options.condition;
iterate = options.iterate;
resultSelector = options.resultSelector || identity;
scheduler = options.scheduler;
}
else if (resultSelectorOrObservable === undefined || isScheduler(resultSelectorOrObservable)) {
initialState = initialStateOrOptions;
resultSelector = identity;
scheduler = resultSelectorOrObservable;
}
else {
initialState = initialStateOrOptions;
resultSelector = resultSelectorOrObservable;
}
return new Observable(function (subscriber) {
var state = initialState;
if (scheduler) {
return scheduler.schedule(dispatch, 0, {
subscriber: subscriber,
iterate: iterate,
condition: condition,
resultSelector: resultSelector,
state: state
});
}
do {
if (condition) {
var conditionResult = void 0;
try {
conditionResult = condition(state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
if (!conditionResult) {
subscriber.complete();
break;
}
}
var value = void 0;
try {
value = resultSelector(state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
subscriber.next(value);
if (subscriber.closed) {
break;
}
try {
state = iterate(state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
} while (true);
return undefined;
});
}
function dispatch(state) {
var subscriber = state.subscriber, condition = state.condition;
if (subscriber.closed) {
return undefined;
}
if (state.needIterate) {
try {
state.state = state.iterate(state.state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
}
else {
state.needIterate = true;
}
if (condition) {
var conditionResult = void 0;
try {
conditionResult = condition(state.state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
if (!conditionResult) {
subscriber.complete();
return undefined;
}
if (subscriber.closed) {
return undefined;
}
}
var value;
try {
value = state.resultSelector(state.state);
}
catch (err) {
subscriber.error(err);
return undefined;
}
if (subscriber.closed) {
return undefined;
}
subscriber.next(value);
if (subscriber.closed) {
return undefined;
}
return this.schedule(state);
}
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