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Add web worker JS API (#1993)

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* Refactored the way worker polling is scheduled and errors are handled.
* Share the worker future as a Shared
This commit is contained in:
andy finch 2019-04-01 15:09:59 -04:00 • committed by Ryan Dahl
parent 659acadf77
commit b0a23beb8f
28 changed files with 1013 additions and 257 deletions
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26
js/compiler.ts
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@ -46,6 +46,7 @@ type SourceMap = string;
interface CompilerLookup {
specifier: ModuleSpecifier;
referrer: ContainingFile;
isWorker: boolean;
}
/** Abstraction of the APIs required from the `os` module so they can be
@ -179,6 +180,8 @@ class Compiler implements ts.LanguageServiceHost, ts.FormatDiagnosticsHost {
// testing
private _ts: Ts = ts;
private readonly _assetsSourceCode: { [key: string]: string };
/** The TypeScript language service often refers to the resolved fileName of
* a module, this is a shortcut to avoid unnecessary module resolution logic
* for modules that may have been initially resolved by a `moduleSpecifier`
@ -239,9 +242,12 @@ class Compiler implements ts.LanguageServiceHost, ts.FormatDiagnosticsHost {
// not null assertion
moduleId = moduleSpecifier.split("/").pop()!;
const assetName = moduleId.includes(".") ? moduleId : `${moduleId}.d.ts`;
assert(assetName in assetSourceCode, `No such asset "${assetName}"`);
assert(
assetName in this._assetsSourceCode,
`No such asset "${assetName}"`
);
mediaType = msg.MediaType.TypeScript;
sourceCode = assetSourceCode[assetName];
sourceCode = this._assetsSourceCode[assetName];
fileName = `${ASSETS}/${assetName}`;
} else {
// We query Rust with a CodeFetch message. It will load the sourceCode,
@ -299,7 +305,8 @@ class Compiler implements ts.LanguageServiceHost, ts.FormatDiagnosticsHost {
innerMap.set(moduleSpecifier, fileName);
}
constructor() {
constructor(assetsSourceCode: { [key: string]: string }) {
this._assetsSourceCode = assetsSourceCode;
this._service = this._ts.createLanguageService(this);
}
@ -498,7 +505,7 @@ class Compiler implements ts.LanguageServiceHost, ts.FormatDiagnosticsHost {
}
}
const compiler = new Compiler();
const compiler = new Compiler(assetSourceCode);
// set global objects for compiler web worker
window.clearTimeout = clearTimer;
@ -514,17 +521,12 @@ window.TextEncoder = TextEncoder;
// lazy instantiating the compiler web worker
window.compilerMain = function compilerMain() {
// workerMain should have already been called since a compiler is a worker.
const encoder = new TextEncoder();
const decoder = new TextDecoder();
window.onmessage = ({ data }: { data: Uint8Array }) => {
const json = decoder.decode(data);
const { specifier, referrer } = JSON.parse(json) as CompilerLookup;
window.onmessage = ({ data }: { data: CompilerLookup }) => {
const { specifier, referrer } = data;
const result = compiler.compile(specifier, referrer);
const responseJson = JSON.stringify(result);
const response = encoder.encode(responseJson);
postMessage(response);
postMessage(result);
};
};