add hw2

node_modules/langium/lib/lsp/call-hierarchy-provider.js

@@ -0,0 +1,61 @@
+/******************************************************************************
+ * Copyright 2022 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 { SymbolKind } from 'vscode-languageserver';
+import { findDeclarationNodeAtOffset } from '../utils/cst-utils.js';
+import { URI } from '../utils/uri-utils.js';
+export class AbstractCallHierarchyProvider {
+    constructor(services) {
+        this.grammarConfig = services.parser.GrammarConfig;
+        this.nameProvider = services.references.NameProvider;
+        this.documents = services.shared.workspace.LangiumDocuments;
+        this.references = services.references.References;
+    }
+    prepareCallHierarchy(document, params) {
+        const rootNode = document.parseResult.value;
+        const targetNode = findDeclarationNodeAtOffset(rootNode.$cstNode, document.textDocument.offsetAt(params.position), this.grammarConfig.nameRegexp);
+        if (!targetNode) {
+            return undefined;
+        }
+        const declarationNode = this.references.findDeclarationNode(targetNode);
+        if (!declarationNode) {
+            return undefined;
+        }
+        return this.getCallHierarchyItems(declarationNode.astNode, document);
+    }
+    getCallHierarchyItems(targetNode, document) {
+        const nameNode = this.nameProvider.getNameNode(targetNode);
+        const name = this.nameProvider.getName(targetNode);
+        if (!nameNode || !targetNode.$cstNode || name === undefined) {
+            return undefined;
+        }
+        return [Object.assign({ kind: SymbolKind.Method, name, range: targetNode.$cstNode.range, selectionRange: nameNode.range, uri: document.uri.toString() }, this.getCallHierarchyItem(targetNode))];
+    }
+    getCallHierarchyItem(_targetNode) {
+        return undefined;
+    }
+    async incomingCalls(params) {
+        const document = await this.documents.getOrCreateDocument(URI.parse(params.item.uri));
+        const rootNode = document.parseResult.value;
+        const targetNode = findDeclarationNodeAtOffset(rootNode.$cstNode, document.textDocument.offsetAt(params.item.range.start), this.grammarConfig.nameRegexp);
+        if (!targetNode) {
+            return undefined;
+        }
+        const references = this.references.findReferences(targetNode.astNode, {
+            includeDeclaration: false
+        });
+        return this.getIncomingCalls(targetNode.astNode, references);
+    }
+    async outgoingCalls(params) {
+        const document = await this.documents.getOrCreateDocument(URI.parse(params.item.uri));
+        const rootNode = document.parseResult.value;
+        const targetNode = findDeclarationNodeAtOffset(rootNode.$cstNode, document.textDocument.offsetAt(params.item.range.start), this.grammarConfig.nameRegexp);
+        if (!targetNode) {
+            return undefined;
+        }
+        return this.getOutgoingCalls(targetNode.astNode);
+    }
+}
+//# sourceMappingURL=call-hierarchy-provider.js.map