Call LSP command as fallback for switch header/source action

Author: sr-tream

src/commands/switchHeaderSource.ts

@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import { getMatchingHeaderSource, logger } from '../extension';
+import { getMatchingHeaderSource, logger, activeLanguageServer, LanguageServer } from '../extension';
 
 
 export async function switchHeaderSourceInWorkspace(): Promise<boolean | undefined> {
@@ -11,8 +11,16 @@ export async function switchHeaderSourceInWorkspace(): Promise<boolean | undefin
 
     const matchingUri = await getMatchingHeaderSource(editor.document.uri);
     if (!matchingUri) {
-        logger.alertInformation('No matching header/source file was found.');
-        return;
+        if (activeLanguageServer() == LanguageServer.cpptools)
+            vscode.commands.executeCommand('C_Cpp.SwitchHeaderSource');
+        else if (activeLanguageServer() == LanguageServer.clangd)
+            vscode.commands.executeCommand('clangd.switchheadersource');
+        else {
+            logger.alertInformation('No matching header/source file was found.');
+            return false;
+        }
+        logger.logInfo('No matching header/source file was found.');
+        return true;
     }
 
     await vscode.window.showTextDocument(matchingUri);