优化

‘liusuyi’

2023-10-21 ae92b6823499cfab77201b4033922fa373fb37a3

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/** PURE_IMPORTS_START _util_canReportError,_util_toSubscriber,_symbol_observable,_util_pipe,_config PURE_IMPORTS_END */
import { canReportError } from './util/canReportError';
import { toSubscriber } from './util/toSubscriber';
import { observable as Symbol_observable } from './symbol/observable';
import { pipeFromArray } from './util/pipe';
import { config } from './config';
var Observable = /*@__PURE__*/ (function () {
    function Observable(subscribe) {
        this._isScalar = false;
        if (subscribe) {
            this._subscribe = subscribe;
        }
    }
    Observable.prototype.lift = function (operator) {
        var observable = new Observable();
        observable.source = this;
        observable.operator = operator;
        return observable;
    };
    Observable.prototype.subscribe = function (observerOrNext, error, complete) {
        var operator = this.operator;
        var sink = toSubscriber(observerOrNext, error, complete);
        if (operator) {
            sink.add(operator.call(sink, this.source));
        }
        else {
            sink.add(this.source || (config.useDeprecatedSynchronousErrorHandling && !sink.syncErrorThrowable) ?
                this._subscribe(sink) :
                this._trySubscribe(sink));
        }
        if (config.useDeprecatedSynchronousErrorHandling) {
            if (sink.syncErrorThrowable) {
                sink.syncErrorThrowable = false;
                if (sink.syncErrorThrown) {
                    throw sink.syncErrorValue;
                }
            }
        }
        return sink;
    };
    Observable.prototype._trySubscribe = function (sink) {
        try {
            return this._subscribe(sink);
        }
        catch (err) {
            if (config.useDeprecatedSynchronousErrorHandling) {
                sink.syncErrorThrown = true;
                sink.syncErrorValue = err;
            }
            if (canReportError(sink)) {
                sink.error(err);
            }
            else {
                console.warn(err);
            }
        }
    };
    Observable.prototype.forEach = function (next, promiseCtor) {
        var _this = this;
        promiseCtor = getPromiseCtor(promiseCtor);
        return new promiseCtor(function (resolve, reject) {
            var subscription;
            subscription = _this.subscribe(function (value) {
                try {
                    next(value);
                }
                catch (err) {
                    reject(err);
                    if (subscription) {
                        subscription.unsubscribe();
                    }
                }
            }, reject, resolve);
        });
    };
    Observable.prototype._subscribe = function (subscriber) {
        var source = this.source;
        return source && source.subscribe(subscriber);
    };
    Observable.prototype[Symbol_observable] = function () {
        return this;
    };
    Observable.prototype.pipe = function () {
        var operations = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            operations[_i] = arguments[_i];
        }
        if (operations.length === 0) {
            return this;
        }
        return pipeFromArray(operations)(this);
    };
    Observable.prototype.toPromise = function (promiseCtor) {
        var _this = this;
        promiseCtor = getPromiseCtor(promiseCtor);
        return new promiseCtor(function (resolve, reject) {
            var value;
            _this.subscribe(function (x) { return value = x; }, function (err) { return reject(err); }, function () { return resolve(value); });
        });
    };
    Observable.create = function (subscribe) {
        return new Observable(subscribe);
    };
    return Observable;
}());
export { Observable };
function getPromiseCtor(promiseCtor) {
    if (!promiseCtor) {
        promiseCtor = config.Promise || Promise;
    }
    if (!promiseCtor) {
        throw new Error('no Promise impl found');
    }
    return promiseCtor;
}
//# sourceMappingURL=Observable.js.map