First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/langium/lib/lsp/definition-provider.d.ts

@@ -0,0 +1,47 @@
+/******************************************************************************
+ * 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 type { DefinitionParams } from 'vscode-languageserver';
+import type { CancellationToken } from '../utils/cancellation.js';
+import type { GrammarConfig } from '../languages/grammar-config.js';
+import type { NameProvider } from '../references/name-provider.js';
+import type { References } from '../references/references.js';
+import type { LangiumServices } from './lsp-services.js';
+import type { CstNode } from '../syntax-tree.js';
+import type { MaybePromise } from '../utils/promise-utils.js';
+import type { LangiumDocument } from '../workspace/documents.js';
+import { LocationLink } from 'vscode-languageserver';
+/**
+ * Language-specific service for handling go to definition requests.
+ */
+export interface DefinitionProvider {
+    /**
+     * Handle a go to definition request.
+     *
+     * @param document The document in which the request was triggered.
+     * @param params The parameters of the request.
+     * @param cancelToken A cancellation token that can be used to cancel the request.
+     * @returns A list of location links to the definition(s) of the symbol at the given position.
+     *
+     * @throws `OperationCancelled` if cancellation is detected during execution
+     * @throws `ResponseError` if an error is detected that should be sent as response to the client
+     */
+    getDefinition(document: LangiumDocument, params: DefinitionParams, cancelToken?: CancellationToken): MaybePromise<LocationLink[] | undefined>;
+}
+export interface GoToLink {
+    source: CstNode;
+    target: CstNode;
+    targetDocument: LangiumDocument;
+}
+export declare class DefaultDefinitionProvider implements DefinitionProvider {
+    protected readonly nameProvider: NameProvider;
+    protected readonly references: References;
+    protected readonly grammarConfig: GrammarConfig;
+    constructor(services: LangiumServices);
+    getDefinition(document: LangiumDocument, params: DefinitionParams, _cancelToken?: CancellationToken): MaybePromise<LocationLink[] | undefined>;
+    protected collectLocationLinks(sourceCstNode: CstNode, _params: DefinitionParams): MaybePromise<LocationLink[] | undefined>;
+    protected findLinks(source: CstNode): GoToLink[];
+}
+//# sourceMappingURL=definition-provider.d.ts.map