fromEvent.js
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"use strict";
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.fromEvent = void 0;
var innerFrom_1 = require("../observable/innerFrom");
var Observable_1 = require("../Observable");
var mergeMap_1 = require("../operators/mergeMap");
var isArrayLike_1 = require("../util/isArrayLike");
var isFunction_1 = require("../util/isFunction");
var mapOneOrManyArgs_1 = require("../util/mapOneOrManyArgs");
var nodeEventEmitterMethods = ['addListener', 'removeListener'];
var eventTargetMethods = ['addEventListener', 'removeEventListener'];
var jqueryMethods = ['on', 'off'];
function fromEvent(target, eventName, options, resultSelector) {
if (isFunction_1.isFunction(options)) {
resultSelector = options;
options = undefined;
}
if (resultSelector) {
return fromEvent(target, eventName, options).pipe(mapOneOrManyArgs_1.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_1.isArrayLike(target)) {
return mergeMap_1.mergeMap(function (subTarget) { return fromEvent(subTarget, eventName, options); })(innerFrom_1.innerFrom(target));
}
}
if (!add) {
throw new TypeError('Invalid event target');
}
return new Observable_1.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); };
});
}
exports.fromEvent = fromEvent;
function toCommonHandlerRegistry(target, eventName) {
return function (methodName) { return function (handler) { return target[methodName](eventName, handler); }; };
}
function isNodeStyleEventEmitter(target) {
return isFunction_1.isFunction(target.addListener) && isFunction_1.isFunction(target.removeListener);
}
function isJQueryStyleEventEmitter(target) {
return isFunction_1.isFunction(target.on) && isFunction_1.isFunction(target.off);
}
function isEventTarget(target) {
return isFunction_1.isFunction(target.addEventListener) && isFunction_1.isFunction(target.removeEventListener);
}
//# sourceMappingURL=fromEvent.js.map