hugoWebsite/node_modules/rxjs/dist/esm5/internal/observable/fromEvent.js

59 lines
2.5 KiB
JavaScript
Raw Normal View History

2022-10-29 00:20:35 +02:00
import { __read } from "tslib";
import { innerFrom } from '../observable/innerFrom';
import { Observable } from '../Observable';
import { mergeMap } from '../operators/mergeMap';
import { isArrayLike } from '../util/isArrayLike';
import { isFunction } from '../util/isFunction';
import { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';
var nodeEventEmitterMethods = ['addListener', 'removeListener'];
var eventTargetMethods = ['addEventListener', 'removeEventListener'];
var jqueryMethods = ['on', 'off'];
export function fromEvent(target, eventName, options, resultSelector) {
if (isFunction(options)) {
resultSelector = options;
options = undefined;
}
if (resultSelector) {
return fromEvent(target, eventName, options).pipe(mapOneOrManyArgs(resultSelector));
}
var _a = __read(isEventTarget(target)
? eventTargetMethods.map(function (methodName) { return function (handler) { return target[methodName](eventName, handler, options); }; })
:
isNodeStyleEventEmitter(target)
? nodeEventEmitterMethods.map(toCommonHandlerRegistry(target, eventName))
: isJQueryStyleEventEmitter(target)
? jqueryMethods.map(toCommonHandlerRegistry(target, eventName))
: [], 2), add = _a[0], remove = _a[1];
if (!add) {
if (isArrayLike(target)) {
return mergeMap(function (subTarget) { return fromEvent(subTarget, eventName, options); })(innerFrom(target));
}
}
if (!add) {
throw new TypeError('Invalid event target');
}
return new Observable(function (subscriber) {
var handler = function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
return subscriber.next(1 < args.length ? args : args[0]);
};
add(handler);
return function () { return remove(handler); };
});
}
function toCommonHandlerRegistry(target, eventName) {
return function (methodName) { return function (handler) { return target[methodName](eventName, handler); }; };
}
function isNodeStyleEventEmitter(target) {
return isFunction(target.addListener) && isFunction(target.removeListener);
}
function isJQueryStyleEventEmitter(target) {
return isFunction(target.on) && isFunction(target.off);
}
function isEventTarget(target) {
return isFunction(target.addEventListener) && isFunction(target.removeEventListener);
}
//# sourceMappingURL=fromEvent.js.map