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4.2 KiB
1 lines
4.2 KiB
{"version":3,"file":"take.js","sourceRoot":"","sources":["../../src/operators/take.ts"],"names":[],"mappings":";;;;;;AACA,2BAA2B,eAAe,CAAC,CAAA;AAC3C,wCAAwC,iCAAiC,CAAC,CAAA;AAC1E,gCAAgC,+BAA+B,CAAC,CAAA;AAKhE;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAgCG;AACH,cAAwB,KAAa;IACnC,MAAM,CAAC,UAAC,MAAqB;QAC3B,EAAE,CAAC,CAAC,KAAK,KAAK,CAAC,CAAC,CAAC,CAAC;YAChB,MAAM,CAAC,IAAI,iCAAe,EAAK,CAAC;QAClC,CAAC;QAAC,IAAI,CAAC,CAAC;YACN,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,YAAY,CAAC,KAAK,CAAC,CAAC,CAAC;QAC9C,CAAC;IACH,CAAC,CAAC;AACJ,CAAC;AARe,YAAI,OAQnB,CAAA;AAED;IACE,sBAAoB,KAAa;QAAb,UAAK,GAAL,KAAK,CAAQ;QAC/B,EAAE,CAAC,CAAC,IAAI,CAAC,KAAK,GAAG,CAAC,CAAC,CAAC,CAAC;YACnB,MAAM,IAAI,iDAAuB,CAAC;QACpC,CAAC;IACH,CAAC;IAED,2BAAI,GAAJ,UAAK,UAAyB,EAAE,MAAW;QACzC,MAAM,CAAC,MAAM,CAAC,SAAS,CAAC,IAAI,cAAc,CAAC,UAAU,EAAE,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC;IACtE,CAAC;IACH,mBAAC;AAAD,CAAC,AAVD,IAUC;AAED;;;;GAIG;AACH;IAAgC,kCAAa;IAG3C,wBAAY,WAA0B,EAAU,KAAa;QAC3D,kBAAM,WAAW,CAAC,CAAC;QAD2B,UAAK,GAAL,KAAK,CAAQ;QAFrD,UAAK,GAAW,CAAC,CAAC;IAI1B,CAAC;IAES,8BAAK,GAAf,UAAgB,KAAQ;QACtB,IAAM,KAAK,GAAG,IAAI,CAAC,KAAK,CAAC;QACzB,IAAM,KAAK,GAAG,EAAE,IAAI,CAAC,KAAK,CAAC;QAC3B,EAAE,CAAC,CAAC,KAAK,IAAI,KAAK,CAAC,CAAC,CAAC;YACnB,IAAI,CAAC,WAAW,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC;YAC7B,EAAE,CAAC,CAAC,KAAK,KAAK,KAAK,CAAC,CAAC,CAAC;gBACpB,IAAI,CAAC,WAAW,CAAC,QAAQ,EAAE,CAAC;gBAC5B,IAAI,CAAC,WAAW,EAAE,CAAC;YACrB,CAAC;QACH,CAAC;IACH,CAAC;IACH,qBAAC;AAAD,CAAC,AAlBD,CAAgC,uBAAU,GAkBzC","sourcesContent":["import { Operator } from '../Operator';\nimport { Subscriber } from '../Subscriber';\nimport { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nimport { EmptyObservable } from '../observable/EmptyObservable';\nimport { Observable } from '../Observable';\nimport { TeardownLogic } from '../Subscription';\nimport { MonoTypeOperatorFunction } from '../interfaces';\n\n/**\n * Emits only the first `count` values emitted by the source Observable.\n *\n * <span class=\"informal\">Takes the first `count` values from the source, then\n * completes.</span>\n *\n * <img src=\"./img/take.png\" width=\"100%\">\n *\n * `take` returns an Observable that emits only the first `count` values emitted\n * by the source Observable. If the source emits fewer than `count` values then\n * all of its values are emitted. After that, it completes, regardless if the\n * source completes.\n *\n * @example <caption>Take the first 5 seconds of an infinite 1-second interval Observable</caption>\n * var interval = Rx.Observable.interval(1000);\n * var five = interval.take(5);\n * five.subscribe(x => console.log(x));\n *\n * @see {@link takeLast}\n * @see {@link takeUntil}\n * @see {@link takeWhile}\n * @see {@link skip}\n *\n * @throws {ArgumentOutOfRangeError} When using `take(i)`, it delivers an\n * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0`.\n *\n * @param {number} count The maximum number of `next` values to emit.\n * @return {Observable<T>} An Observable that emits only the first `count`\n * values emitted by the source Observable, or all of the values from the source\n * if the source emits fewer than `count` values.\n * @method take\n * @owner Observable\n */\nexport function take<T>(count: number): MonoTypeOperatorFunction<T> {\n return (source: Observable<T>) => {\n if (count === 0) {\n return new EmptyObservable<T>();\n } else {\n return source.lift(new TakeOperator(count));\n }\n };\n}\n\nclass TakeOperator<T> implements Operator<T, T> {\n constructor(private total: number) {\n if (this.total < 0) {\n throw new ArgumentOutOfRangeError;\n }\n }\n\n call(subscriber: Subscriber<T>, source: any): TeardownLogic {\n return source.subscribe(new TakeSubscriber(subscriber, this.total));\n }\n}\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @ignore\n * @extends {Ignored}\n */\nclass TakeSubscriber<T> extends Subscriber<T> {\n private count: number = 0;\n\n constructor(destination: Subscriber<T>, private total: number) {\n super(destination);\n }\n\n protected _next(value: T): void {\n const total = this.total;\n const count = ++this.count;\n if (count <= total) {\n this.destination.next(value);\n if (count === total) {\n this.destination.complete();\n this.unsubscribe();\n }\n }\n }\n}\n"]} |