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6.2 KiB
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{"version":3,"file":"abort-controller.mjs","sources":["../src/abort-signal.ts","../src/abort-controller.ts"],"sourcesContent":["import {\n // Event,\n EventTarget,\n // Type,\n defineEventAttribute,\n} from \"event-target-shim\"\n\n// Known Limitation\n// Use `any` because the type of `AbortSignal` in `lib.dom.d.ts` is wrong and\n// to make assignable our `AbortSignal` into that.\n// https://github.com/Microsoft/TSJS-lib-generator/pull/623\ntype Events = {\n abort: any // Event & Type<\"abort\">\n}\ntype EventAttributes = {\n onabort: any // Event & Type<\"abort\">\n}\n\n/**\n * The signal class.\n * @see https://dom.spec.whatwg.org/#abortsignal\n */\nexport default class AbortSignal extends EventTarget<Events, EventAttributes> {\n /**\n * AbortSignal cannot be constructed directly.\n */\n public constructor() {\n super()\n throw new TypeError(\"AbortSignal cannot be constructed directly\")\n }\n\n /**\n * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.\n */\n public get aborted(): boolean {\n const aborted = abortedFlags.get(this)\n if (typeof aborted !== \"boolean\") {\n throw new TypeError(\n `Expected 'this' to be an 'AbortSignal' object, but got ${\n this === null ? \"null\" : typeof this\n }`,\n )\n }\n return aborted\n }\n}\ndefineEventAttribute(AbortSignal.prototype, \"abort\")\n\n/**\n * Create an AbortSignal object.\n */\nexport function createAbortSignal(): AbortSignal {\n const signal = Object.create(AbortSignal.prototype)\n EventTarget.call(signal)\n abortedFlags.set(signal, false)\n return signal\n}\n\n/**\n * Abort a given signal.\n */\nexport function abortSignal(signal: AbortSignal): void {\n if (abortedFlags.get(signal) !== false) {\n return\n }\n\n abortedFlags.set(signal, true)\n signal.dispatchEvent<\"abort\">({ type: \"abort\" })\n}\n\n/**\n * Aborted flag for each instances.\n */\nconst abortedFlags = new WeakMap<AbortSignal, boolean>()\n\n// Properties should be enumerable.\nObject.defineProperties(AbortSignal.prototype, {\n aborted: { enumerable: true },\n})\n\n// `toString()` should return `\"[object AbortSignal]\"`\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {\n configurable: true,\n value: \"AbortSignal\",\n })\n}\n","import AbortSignal, { abortSignal, createAbortSignal } from \"./abort-signal\"\n\n/**\n * The AbortController.\n * @see https://dom.spec.whatwg.org/#abortcontroller\n */\nexport default class AbortController {\n /**\n * Initialize this controller.\n */\n public constructor() {\n signals.set(this, createAbortSignal())\n }\n\n /**\n * Returns the `AbortSignal` object associated with this object.\n */\n public get signal(): AbortSignal {\n return getSignal(this)\n }\n\n /**\n * Abort and signal to any observers that the associated activity is to be aborted.\n */\n public abort(): void {\n abortSignal(getSignal(this))\n }\n}\n\n/**\n * Associated signals.\n */\nconst signals = new WeakMap<AbortController, AbortSignal>()\n\n/**\n * Get the associated signal of a given controller.\n */\nfunction getSignal(controller: AbortController): AbortSignal {\n const signal = signals.get(controller)\n if (signal == null) {\n throw new TypeError(\n `Expected 'this' to be an 'AbortController' object, but got ${\n controller === null ? \"null\" : typeof controller\n }`,\n )\n }\n return signal\n}\n\n// Properties should be enumerable.\nObject.defineProperties(AbortController.prototype, {\n signal: { enumerable: true },\n abort: { enumerable: true },\n})\n\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n Object.defineProperty(AbortController.pr
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