langium
Version:
A language engineering tool for the Language Server Protocol
78 lines • 3.1 kB
JavaScript
/******************************************************************************
* Copyright 2021 TypeFox GmbH
* This program and the accompanying materials are made available under the
* terms of the MIT License, which is available in the project root.
******************************************************************************/
import { UriUtils } from './utils/uri-utils.js';
/**
* Generic registry for Langium services, but capable of being used with extending service sets as well (such as the lsp-complete LangiumCoreServices set)
*/
export class DefaultServiceRegistry {
/**
* @deprecated Since 3.1.0. Use the new `fileExtensionMap` (or `languageIdMap`) property instead.
*/
get map() {
return this.fileExtensionMap;
}
constructor(services) {
this.languageIdMap = new Map();
this.fileExtensionMap = new Map();
this.fileNameMap = new Map();
this.textDocuments = services?.workspace.TextDocuments;
}
register(language) {
const data = language.LanguageMetaData;
for (const ext of data.fileExtensions) {
if (this.fileExtensionMap.has(ext)) {
console.warn(`The file extension ${ext} is used by multiple languages. It is now assigned to '${data.languageId}'.`);
}
this.fileExtensionMap.set(ext, language);
}
if (data.fileNames) {
for (const name of data.fileNames) {
if (this.fileNameMap.has(name)) {
console.warn(`The file name ${name} is used by multiple languages. It is now assigned to '${data.languageId}'.`);
}
this.fileNameMap.set(name, language);
}
}
this.languageIdMap.set(data.languageId, language);
}
getServices(uri) {
if (this.languageIdMap.size === 0) {
throw new Error('The service registry is empty. Use `register` to register the services of a language.');
}
const languageId = this.textDocuments?.get(uri)?.languageId;
if (languageId !== undefined) {
const services = this.languageIdMap.get(languageId);
if (services) {
return services;
}
}
const ext = UriUtils.extname(uri);
const name = UriUtils.basename(uri);
const services = this.fileNameMap.get(name) ?? this.fileExtensionMap.get(ext);
if (!services) {
if (languageId) {
throw new Error(`The service registry contains no services for the extension '${ext}' for language '${languageId}'.`);
}
else {
throw new Error(`The service registry contains no services for the extension '${ext}'.`);
}
}
return services;
}
hasServices(uri) {
try {
this.getServices(uri);
return true;
}
catch {
return false;
}
}
get all() {
return Array.from(this.languageIdMap.values());
}
}
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