58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = Filter;
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var _Pipe = require('../sink/Pipe');
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var _Pipe2 = _interopRequireDefault(_Pipe);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function Filter(p, source) {
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this.p = p;
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this.source = source;
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}
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/**
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* Create a filtered source, fusing adjacent filter.filter if possible
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* @param {function(x:*):boolean} p filtering predicate
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* @param {{run:function}} source source to filter
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* @returns {Filter} filtered source
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*/
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/** @license MIT License (c) copyright 2010-2016 original author or authors */
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/** @author Brian Cavalier */
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/** @author John Hann */
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Filter.create = function createFilter(p, source) {
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if (source instanceof Filter) {
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return new Filter(and(source.p, p), source.source);
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}
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return new Filter(p, source);
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};
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Filter.prototype.run = function (sink, scheduler) {
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return this.source.run(new FilterSink(this.p, sink), scheduler);
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};
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function FilterSink(p, sink) {
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this.p = p;
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this.sink = sink;
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}
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FilterSink.prototype.end = _Pipe2.default.prototype.end;
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FilterSink.prototype.error = _Pipe2.default.prototype.error;
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FilterSink.prototype.event = function (t, x) {
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var p = this.p;
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p(x) && this.sink.event(t, x);
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};
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function and(p, q) {
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return function (x) {
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return p(x) && q(x);
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};
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} |