78 lines
3.2 KiB
JavaScript
78 lines
3.2 KiB
JavaScript
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"use strict";
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var __read = (this && this.__read) || function (o, n) {
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var m = typeof Symbol === "function" && o[Symbol.iterator];
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if (!m) return o;
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var i = m.call(o), r, ar = [], e;
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try {
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while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
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}
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catch (error) { e = { error: error }; }
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finally {
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try {
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if (r && !r.done && (m = i["return"])) m.call(i);
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}
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finally { if (e) throw e.error; }
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}
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return ar;
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.fromEvent = void 0;
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var innerFrom_1 = require("../observable/innerFrom");
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var Observable_1 = require("../Observable");
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var mergeMap_1 = require("../operators/mergeMap");
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var isArrayLike_1 = require("../util/isArrayLike");
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var isFunction_1 = require("../util/isFunction");
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var mapOneOrManyArgs_1 = require("../util/mapOneOrManyArgs");
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var nodeEventEmitterMethods = ['addListener', 'removeListener'];
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var eventTargetMethods = ['addEventListener', 'removeEventListener'];
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var jqueryMethods = ['on', 'off'];
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function fromEvent(target, eventName, options, resultSelector) {
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if (isFunction_1.isFunction(options)) {
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resultSelector = options;
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options = undefined;
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}
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if (resultSelector) {
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return fromEvent(target, eventName, options).pipe(mapOneOrManyArgs_1.mapOneOrManyArgs(resultSelector));
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}
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var _a = __read(isEventTarget(target)
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? eventTargetMethods.map(function (methodName) { return function (handler) { return target[methodName](eventName, handler, options); }; })
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:
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isNodeStyleEventEmitter(target)
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? nodeEventEmitterMethods.map(toCommonHandlerRegistry(target, eventName))
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: isJQueryStyleEventEmitter(target)
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? jqueryMethods.map(toCommonHandlerRegistry(target, eventName))
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: [], 2), add = _a[0], remove = _a[1];
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if (!add) {
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if (isArrayLike_1.isArrayLike(target)) {
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return mergeMap_1.mergeMap(function (subTarget) { return fromEvent(subTarget, eventName, options); })(innerFrom_1.innerFrom(target));
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}
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}
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if (!add) {
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throw new TypeError('Invalid event target');
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}
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return new Observable_1.Observable(function (subscriber) {
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var handler = function () {
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var args = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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args[_i] = arguments[_i];
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}
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return subscriber.next(1 < args.length ? args : args[0]);
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};
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add(handler);
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return function () { return remove(handler); };
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});
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}
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exports.fromEvent = fromEvent;
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function toCommonHandlerRegistry(target, eventName) {
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return function (methodName) { return function (handler) { return target[methodName](eventName, handler); }; };
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}
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function isNodeStyleEventEmitter(target) {
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return isFunction_1.isFunction(target.addListener) && isFunction_1.isFunction(target.removeListener);
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}
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function isJQueryStyleEventEmitter(target) {
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return isFunction_1.isFunction(target.on) && isFunction_1.isFunction(target.off);
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}
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function isEventTarget(target) {
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return isFunction_1.isFunction(target.addEventListener) && isFunction_1.isFunction(target.removeEventListener);
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}
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//# sourceMappingURL=fromEvent.js.map
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