Merge pull request dotnet#5059 from JoeRobich/only-highlight-files

Only semantically highlight documents from uri.scheme 'file'

Author: JoeRobich

src/features/semanticTokensProvider.ts

@@ -190,16 +190,18 @@ export default class SemanticTokensProvider extends AbstractProvider implements
     }
 
     async _provideSemanticTokens(document: vscode.TextDocument, range: protocol.V2.Range, token: vscode.CancellationToken): Promise<vscode.SemanticTokens | null> {
+        // We can only semantically highlight file from disk.
+        if (document.uri.scheme !== "file") {
+            return null;
+        }
+
         const options = this.optionProvider.GetLatestOptions();
         if (!options.useSemanticHighlighting) {
             return null;
         }
 
         let req = createRequest<protocol.V2.SemanticHighlightRequest>(document, new vscode.Position(0, 0));
         req.Range = range;
-        // We need to include the document contents in our request for cases where we are highlighting
-        // a version of the document other than the current version, such as in the Diff view.
-        req.VersionedText = document.getText();
 
         const versionBeforeRequest = document.version;