25 lines
No EOL
926 B
JavaScript
25 lines
No EOL
926 B
JavaScript
import { Observable } from '../Observable';
|
|
import { isArray } from '../util/isArray';
|
|
import { isFunction } from '../util/isFunction';
|
|
import { map } from '../operators/map';
|
|
export function fromEventPattern(addHandler, removeHandler, resultSelector) {
|
|
if (resultSelector) {
|
|
return fromEventPattern(addHandler, removeHandler).pipe(map(args => isArray(args) ? resultSelector(...args) : resultSelector(args)));
|
|
}
|
|
return new Observable(subscriber => {
|
|
const handler = (...e) => subscriber.next(e.length === 1 ? e[0] : e);
|
|
let retValue;
|
|
try {
|
|
retValue = addHandler(handler);
|
|
}
|
|
catch (err) {
|
|
subscriber.error(err);
|
|
return undefined;
|
|
}
|
|
if (!isFunction(removeHandler)) {
|
|
return undefined;
|
|
}
|
|
return () => removeHandler(handler, retValue);
|
|
});
|
|
}
|
|
//# sourceMappingURL=fromEventPattern.js.map
|