| 1 | {"version":3,"sources":["../src/CancellationToken.ts"],"names":[],"mappings":";;;;;;;AAAA;AAAA;;AAAA;AAAA;AAAA;;AAAA;AAAA;;AAEM,MAAO,iBAAP,SAAiC,sBAAjC,CAA6C;AAiBjD;AACA,EAAA,WAAA,CAAY,MAAZ,EAAsC;AACpC;AAlBM,SAAA,mBAAA,GAA0C,IAA1C;AAOA,SAAA,OAAA,GAAoC,IAApC;AAaN,SAAK,UAAL,GAAkB,KAAlB;;AACA,QAAI,MAAM,IAAI,IAAd,EAAoB;AAClB,WAAK,MAAL,GAAc,MAAd;AACD;AACF;;AArBD,MAAI,SAAJ,GAAa;AACX,WAAO,KAAK,UAAL,IAAoB,KAAK,OAAL,IAAgB,IAAhB,IAAwB,KAAK,OAAL,CAAa,SAAhE;AACD;;AAGD,MAAI,MAAJ,CAAW,KAAX,EAAmC;AACjC,SAAK,yBAAL;AAEA,SAAK,OAAL,GAAe,KAAf;;AACA,SAAK,mBAAL,GAA2B,MAAM,KAAK,MAAL,EAAjC;;AACA,SAAK,OAAL,CAAa,QAAb,CAAsB,KAAK,mBAA3B;AACD;;AAYD,EAAA,MAAM,GAAA;AACJ,SAAK,UAAL,GAAkB,IAAlB;AACA,SAAK,IAAL,CAAU,QAAV;AACD;;AAEO,EAAA,QAAQ,CAAC,OAAD,EAAmB;AACjC,QAAI,KAAK,SAAT,EAAoB;AAClB,MAAA,OAAO;AACR,KAFD,MAGK;AACH,WAAK,IAAL,CAAU,QAAV,EAAoB,OAApB;AACD;AACF;;AAED,EAAA,aAAa,CAAI,QAAJ,EAAyI;AACpJ,QAAI,KAAK,SAAT,EAAoB;AAClB,aAAO,OAAO,CAAC,MAAR,CAAkB,IAAI,iBAAJ,EAAlB,CAAP;AACD;;AAED,UAAM,cAAc,GAAG,MAAK;AAC1B,UAAI,aAAa,IAAI,IAArB,EAA2B;AACzB,YAAI;AACF,eAAK,cAAL,CAAoB,QAApB,EAA8B,aAA9B;AACA,UAAA,aAAa,GAAG,IAAhB;AACD,SAHD,CAIA,OAAO,MAAP,EAAe,CACb;AACD;AACF;AACF,KAVD;;AAYA,QAAI,aAAa,GAAwB,IAAzC;AACA,WAAO,IAAI,OAAJ,CAAe,CAAC,OAAD,EAAU,MAAV,KAAoB;AACxC,UAAI,kBAAkB,GAAwB,IAA9C;;AAEA,MAAA,aAAa,GAAG,MAAK;AACnB,YAAI;AACF,cAAI,kBAAkB,IAAI,IAA1B,EAAgC;AAC9B,YAAA,kBAAkB;AAClB,YAAA,kBAAkB,GAAG,IAArB;AACD;AACF,SALD,SAMQ;AACN,UAAA,MAAM,CAAC,IAAI,iBAAJ,EAAD,CAAN;AACD;AACF,OAVD;;AAYA,UAAI,KAAK,SAAT,EAAoB;AAClB,QAAA,aAAa;AACb;AACD;;AAED,WAAK,QAAL,CAAc,aAAd;AAEA,MAAA,QAAQ,CAAC,OAAD,EAAU,MAAV,EAAmB,QAAD,IAAyB;AACjD,QAAA,kBAAkB,GAAG,QAArB;AACD,OAFO,CAAR;AAGD,KAzBM,EA0BJ,IA1BI,CA0BC,EAAE,IAAG;AACT,MAAA,cAAc;AACd,aAAO,EAAP;AACD,KA7BI,EA8BJ,KA9BI,CA8BE,CAAC,IAAG;AACT,MAAA,cAAc;AACd,YAAM,CAAN;AACD,KAjCI,CAAP;AAkCD;;AAEO,EAAA,yBAAyB,GAAA;AAC/B,UAAM,MAAM,GAAG,KAAK,OAApB;;AACA,QAAI,MAAM,IAAI,IAAV,IAAkB,KAAK,mBAAL,IAA4B,IAAlD,EAAwD;AACtD,MAAA,MAAM,CAAC,cAAP,CAAsB,QAAtB,EAAgC,KAAK,mBAArC;AACA,WAAK,mBAAL,GAA2B,IAA3B;AACD;AACF;;AAED,EAAA,OAAO,GAAA;AACL,QAAI;AACF,WAAK,yBAAL;AACD,KAFD,SAGQ;AACN,WAAK,kBAAL;AACA,WAAK,OAAL,GAAe,IAAf;AACD;AACF;;AA/GgD;;;;AAkH7C,MAAO,iBAAP,SAAiC,KAAjC,CAAsC;AAC1C,EAAA,WAAA,GAAA;AACE,UAAM,WAAN;AACD;;AAHyC,C","sourcesContent":["import { EventEmitter } from \"events\"\n\nexport class CancellationToken extends EventEmitter {\n private parentCancelHandler: (() => any) | null = null\n\n private _cancelled: boolean\n get cancelled(): boolean {\n return this._cancelled || (this._parent != null && this._parent.cancelled)\n }\n\n private _parent: CancellationToken | null = null\n set parent(value: CancellationToken) {\n this.removeParentCancelHandler()\n\n this._parent = value\n this.parentCancelHandler = () => this.cancel()\n this._parent.onCancel(this.parentCancelHandler)\n }\n\n // babel cannot compile ... correctly for super calls\n constructor(parent?: CancellationToken) {\n super()\n\n this._cancelled = false\n if (parent != null) {\n this.parent = parent\n }\n }\n\n cancel() {\n this._cancelled = true\n this.emit(\"cancel\")\n }\n\n private onCancel(handler: () => any) {\n if (this.cancelled) {\n handler()\n }\n else {\n this.once(\"cancel\", handler)\n }\n }\n\n createPromise<R>(callback: (resolve: (thenableOrResult?: R) => void, reject: (error: Error) => void, onCancel: (callback: () => void) => void) => void): Promise<R> {\n if (this.cancelled) {\n return Promise.reject<R>(new CancellationError())\n }\n\n const finallyHandler = () => {\n if (cancelHandler != null) {\n try {\n this.removeListener(\"cancel\", cancelHandler)\n cancelHandler = null\n }\n catch (ignore) {\n // ignore\n }\n }\n }\n\n let cancelHandler: (() => void) | null = null\n return new Promise<R>((resolve, reject) => {\n let addedCancelHandler: (() => void) | null = null\n\n cancelHandler = () => {\n try {\n if (addedCancelHandler != null) {\n addedCancelHandler()\n addedCancelHandler = null\n }\n }\n finally {\n reject(new CancellationError())\n }\n }\n\n if (this.cancelled) {\n cancelHandler()\n return\n }\n\n this.onCancel(cancelHandler)\n\n callback(resolve, reject, (callback: () => void) => {\n addedCancelHandler = callback\n })\n })\n .then(it => {\n finallyHandler()\n return it\n })\n .catch(e => {\n finallyHandler()\n throw e\n })\n }\n\n private removeParentCancelHandler() {\n const parent = this._parent\n if (parent != null && this.parentCancelHandler != null) {\n parent.removeListener(\"cancel\", this.parentCancelHandler)\n this.parentCancelHandler = null\n }\n }\n\n dispose() {\n try {\n this.removeParentCancelHandler()\n }\n finally {\n this.removeAllListeners()\n this._parent = null\n }\n }\n}\n\nexport class CancellationError extends Error {\n constructor() {\n super(\"Cancelled\")\n }\n}"],"sourceRoot":""}
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