ducha-qianduan/node_modules/rxjs/internal/observable/fromEventPattern.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var Observable_1 = require("../Observable");
var isArray_1 = require("../util/isArray");
var isFunction_1 = require("../util/isFunction");
var map_1 = require("../operators/map");
function fromEventPattern(addHandler, removeHandler, resultSelector) {
    if (resultSelector) {
        return fromEventPattern(addHandler, removeHandler).pipe(map_1.map(function (args) { return isArray_1.isArray(args) ? resultSelector.apply(void 0, args) : resultSelector(args); }));
    }
    return new Observable_1.Observable(function (subscriber) {
        var handler = function () {
            var e = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                e[_i] = arguments[_i];
            }
            return subscriber.next(e.length === 1 ? e[0] : e);
        };
        var retValue;
        try {
            retValue = addHandler(handler);
        }
        catch (err) {
            subscriber.error(err);
            return undefined;
        }
        if (!isFunction_1.isFunction(removeHandler)) {
            return undefined;
        }
        return function () { return removeHandler(handler, retValue); };
    });
}
exports.fromEventPattern = fromEventPattern;
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