First commit.

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

client/node_modules/langium/lib/lsp/folding-range-provider.d.ts

@@ -0,0 +1,57 @@
+/******************************************************************************
+ * 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 { FoldingRangeParams } from 'vscode-languageserver';
+import type { CancellationToken } from '../utils/cancellation.js';
+import type { LangiumServices } from './lsp-services.js';
+import type { AstNode, CstNode } from '../syntax-tree.js';
+import type { MaybePromise } from '../utils/promise-utils.js';
+import type { LangiumDocument } from '../workspace/documents.js';
+import { FoldingRange } from 'vscode-languageserver';
+/**
+ * Language-specific service for handling folding range requests.
+ */
+export interface FoldingRangeProvider {
+    /**
+     * Handle a folding range request.
+     *
+     * @param document The document to compute folding ranges for
+     * @param params The folding range parameters
+     * @param cancelToken A cancellation token that can be used to cancel the request
+     * @returns The computed folding ranges
+     *
+     * @throws `OperationCancelled` if cancellation is detected during execution
+     * @throws `ResponseError` if an error is detected that should be sent as response to the client
+     */
+    getFoldingRanges(document: LangiumDocument, params: FoldingRangeParams, cancelToken?: CancellationToken): MaybePromise<FoldingRange[]>;
+}
+export type FoldingRangeAcceptor = (foldingRange: FoldingRange) => void;
+export declare class DefaultFoldingRangeProvider implements FoldingRangeProvider {
+    protected readonly commentNames: string[];
+    constructor(services: LangiumServices);
+    getFoldingRanges(document: LangiumDocument, _params: FoldingRangeParams, _cancelToken?: CancellationToken): MaybePromise<FoldingRange[]>;
+    protected collectFolding(document: LangiumDocument, acceptor: FoldingRangeAcceptor): void;
+    /**
+     * Template method to determine whether the specified `AstNode` should be handled by the folding range provider.
+     * Returns true by default for all nodes. Returning false only ignores the specified node and not its content.
+     * To ignore the content of a node use `shouldProcessContent`.
+     */
+    protected shouldProcess(_node: AstNode): boolean;
+    /**
+     * Template method to determine whether the content/children of the specified `AstNode` should be handled by the folding range provider.
+     * Returns true by default for all nodes. Returning false ignores _all_ content of this node, even transitive ones.
+     * For more precise control over foldings use the `shouldProcess` method.
+     */
+    protected shouldProcessContent(_node: AstNode): boolean;
+    protected collectObjectFolding(document: LangiumDocument, node: AstNode, acceptor: FoldingRangeAcceptor): void;
+    protected collectCommentFolding(document: LangiumDocument, node: AstNode, acceptor: FoldingRangeAcceptor): void;
+    protected toFoldingRange(document: LangiumDocument, node: CstNode, kind?: string): FoldingRange | undefined;
+    /**
+     * Template method to determine whether the folding range for this cst node should include its last line.
+     * Returns false by default for ast nodes which end in braces and for comments.
+     */
+    protected includeLastFoldingLine(node: CstNode, kind?: string): boolean;
+}
+//# sourceMappingURL=folding-range-provider.d.ts.map