{"version":3,"file":"takeWhile.js","sourceRoot":"","sources":["../../src/operators/takeWhile.ts"],"names":[],"mappings":";;;;;;AAEA,2BAA2B,eAAe,CAAC,CAAA;AAI3C;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAmCG;AACH,mBAA6B,SAA+C;IAC1E,MAAM,CAAC,UAAC,MAAqB,IAAK,OAAA,MAAM,CAAC,IAAI,CAAC,IAAI,iBAAiB,CAAC,SAAS,CAAC,CAAC,EAA7C,CAA6C,CAAC;AAClF,CAAC;AAFe,iBAAS,YAExB,CAAA;AAED;IACE,2BAAoB,SAA+C;QAA/C,cAAS,GAAT,SAAS,CAAsC;IACnE,CAAC;IAED,gCAAI,GAAJ,UAAK,UAAyB,EAAE,MAAW;QACzC,MAAM,CAAC,MAAM,CAAC,SAAS,CAAC,IAAI,mBAAmB,CAAC,UAAU,EAAE,IAAI,CAAC,SAAS,CAAC,CAAC,CAAC;IAC/E,CAAC;IACH,wBAAC;AAAD,CAAC,AAPD,IAOC;AAED;;;;GAIG;AACH;IAAqC,uCAAa;IAGhD,6BAAY,WAA0B,EAClB,SAA+C;QACjE,kBAAM,WAAW,CAAC,CAAC;QADD,cAAS,GAAT,SAAS,CAAsC;QAH3D,UAAK,GAAW,CAAC,CAAC;IAK1B,CAAC;IAES,mCAAK,GAAf,UAAgB,KAAQ;QACtB,IAAM,WAAW,GAAG,IAAI,CAAC,WAAW,CAAC;QACrC,IAAI,MAAe,CAAC;QACpB,IAAI,CAAC;YACH,MAAM,GAAG,IAAI,CAAC,SAAS,CAAC,KAAK,EAAE,IAAI,CAAC,KAAK,EAAE,CAAC,CAAC;QAC/C,CAAE;QAAA,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;YACb,WAAW,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;YACvB,MAAM,CAAC;QACT,CAAC;QACD,IAAI,CAAC,cAAc,CAAC,KAAK,EAAE,MAAM,CAAC,CAAC;IACrC,CAAC;IAEO,4CAAc,GAAtB,UAAuB,KAAQ,EAAE,eAAwB;QACvD,IAAM,WAAW,GAAG,IAAI,CAAC,WAAW,CAAC;QACrC,EAAE,CAAC,CAAC,OAAO,CAAC,eAAe,CAAC,CAAC,CAAC,CAAC;YAC7B,WAAW,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC;QAC1B,CAAC;QAAC,IAAI,CAAC,CAAC;YACN,WAAW,CAAC,QAAQ,EAAE,CAAC;QACzB,CAAC;IACH,CAAC;IACH,0BAAC;AAAD,CAAC,AA5BD,CAAqC,uBAAU,GA4B9C","sourcesContent":["import { Operator } from '../Operator';\nimport { Observable } from '../Observable';\nimport { Subscriber } from '../Subscriber';\nimport { TeardownLogic } from '../Subscription';\nimport { MonoTypeOperatorFunction } from '../interfaces';\n\n/**\n * Emits values emitted by the source Observable so long as each value satisfies\n * the given `predicate`, and then completes as soon as this `predicate` is not\n * satisfied.\n *\n * <span class=\"informal\">Takes values from the source only while they pass the\n * condition given. When the first value does not satisfy, it completes.</span>\n *\n * <img src=\"./img/takeWhile.png\" width=\"100%\">\n *\n * `takeWhile` subscribes and begins mirroring the source Observable. Each value\n * emitted on the source is given to the `predicate` function which returns a\n * boolean, representing a condition to be satisfied by the source values. The\n * output Observable emits the source values until such time as the `predicate`\n * returns false, at which point `takeWhile` stops mirroring the source\n * Observable and completes the output Observable.\n *\n * @example <caption>Emit click events only while the clientX property is greater than 200</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.takeWhile(ev => ev.clientX > 200);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link take}\n * @see {@link takeLast}\n * @see {@link takeUntil}\n * @see {@link skip}\n *\n * @param {function(value: T, index: number): boolean} predicate A function that\n * evaluates a value emitted by the source Observable and returns a boolean.\n * Also takes the (zero-based) index as the second argument.\n * @return {Observable<T>} An Observable that emits the values from the source\n * Observable so long as each value satisfies the condition defined by the\n * `predicate`, then completes.\n * @method takeWhile\n * @owner Observable\n */\nexport function takeWhile<T>(predicate: (value: T, index: number) => boolean): MonoTypeOperatorFunction<T> {\n  return (source: Observable<T>) => source.lift(new TakeWhileOperator(predicate));\n}\n\nclass TakeWhileOperator<T> implements Operator<T, T> {\n  constructor(private predicate: (value: T, index: number) => boolean) {\n  }\n\n  call(subscriber: Subscriber<T>, source: any): TeardownLogic {\n    return source.subscribe(new TakeWhileSubscriber(subscriber, this.predicate));\n  }\n}\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @ignore\n * @extends {Ignored}\n */\nclass TakeWhileSubscriber<T> extends Subscriber<T> {\n  private index: number = 0;\n\n  constructor(destination: Subscriber<T>,\n              private predicate: (value: T, index: number) => boolean) {\n    super(destination);\n  }\n\n  protected _next(value: T): void {\n    const destination = this.destination;\n    let result: boolean;\n    try {\n      result = this.predicate(value, this.index++);\n    } catch (err) {\n      destination.error(err);\n      return;\n    }\n    this.nextOrComplete(value, result);\n  }\n\n  private nextOrComplete(value: T, predicateResult: boolean): void {\n    const destination = this.destination;\n    if (Boolean(predicateResult)) {\n      destination.next(value);\n    } else {\n      destination.complete();\n    }\n  }\n}\n"]}