ducha-qianduan/node_modules/rxjs/internal/operators/find.js

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    }
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
function find(predicate, thisArg) {
    if (typeof predicate !== 'function') {
        throw new TypeError('predicate is not a function');
    }
    return function (source) { return source.lift(new FindValueOperator(predicate, source, false, thisArg)); };
}
exports.find = find;
var FindValueOperator = (function () {
    function FindValueOperator(predicate, source, yieldIndex, thisArg) {
        this.predicate = predicate;
        this.source = source;
        this.yieldIndex = yieldIndex;
        this.thisArg = thisArg;
    }
    FindValueOperator.prototype.call = function (observer, source) {
        return source.subscribe(new FindValueSubscriber(observer, this.predicate, this.source, this.yieldIndex, this.thisArg));
    };
    return FindValueOperator;
}());
exports.FindValueOperator = FindValueOperator;
var FindValueSubscriber = (function (_super) {
    __extends(FindValueSubscriber, _super);
    function FindValueSubscriber(destination, predicate, source, yieldIndex, thisArg) {
        var _this = _super.call(this, destination) || this;
        _this.predicate = predicate;
        _this.source = source;
        _this.yieldIndex = yieldIndex;
        _this.thisArg = thisArg;
        _this.index = 0;
        return _this;
    }
    FindValueSubscriber.prototype.notifyComplete = function (value) {
        var destination = this.destination;
        destination.next(value);
        destination.complete();
        this.unsubscribe();
    };
    FindValueSubscriber.prototype._next = function (value) {
        var _a = this, predicate = _a.predicate, thisArg = _a.thisArg;
        var index = this.index++;
        try {
            var result = predicate.call(thisArg || this, value, index, this.source);
            if (result) {
                this.notifyComplete(this.yieldIndex ? index : value);
            }
        }
        catch (err) {
            this.destination.error(err);
        }
    };
    FindValueSubscriber.prototype._complete = function () {
        this.notifyComplete(this.yieldIndex ? -1 : undefined);
    };
    return FindValueSubscriber;
}(Subscriber_1.Subscriber));
exports.FindValueSubscriber = FindValueSubscriber;
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