add hw2

node_modules/langium/lib/lsp/document-symbol-provider.js

@@ -0,0 +1,44 @@
+/******************************************************************************
+ * 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 { streamContents } from '../utils/ast-utils.js';
+export class DefaultDocumentSymbolProvider {
+    constructor(services) {
+        this.nameProvider = services.references.NameProvider;
+        this.nodeKindProvider = services.shared.lsp.NodeKindProvider;
+    }
+    getSymbols(document, _params, _cancelToken) {
+        return this.getSymbol(document, document.parseResult.value);
+    }
+    getSymbol(document, astNode) {
+        const node = astNode.$cstNode;
+        const nameNode = this.nameProvider.getNameNode(astNode);
+        if (nameNode && node) {
+            const name = this.nameProvider.getName(astNode);
+            return [{
+                    kind: this.nodeKindProvider.getSymbolKind(astNode),
+                    name: name || nameNode.text,
+                    range: node.range,
+                    selectionRange: nameNode.range,
+                    children: this.getChildSymbols(document, astNode)
+                }];
+        }
+        else {
+            return this.getChildSymbols(document, astNode) || [];
+        }
+    }
+    getChildSymbols(document, astNode) {
+        const children = [];
+        for (const child of streamContents(astNode)) {
+            const result = this.getSymbol(document, child);
+            children.push(...result);
+        }
+        if (children.length > 0) {
+            return children;
+        }
+        return undefined;
+    }
+}
+//# sourceMappingURL=document-symbol-provider.js.map