fix: Force disable augmentsSyntaxTokens capability on VSCode

Author: Veykril

editors/code/src/client.ts

@@ -366,6 +366,7 @@ export async function createClient(
 
     // To turn on all proposed features use: client.registerProposedFeatures();
     client.registerFeature(new ExperimentalFeatures());
+    client.registerFeature(new OverrideFeatures());
 
     return client;
 }
@@ -401,6 +402,25 @@ class ExperimentalFeatures implements lc.StaticFeature {
     dispose(): void {}
 }
 
+class OverrideFeatures implements lc.StaticFeature {
+    getState(): lc.FeatureState {
+        return { kind: "static" };
+    }
+    fillClientCapabilities(capabilities: lc.ClientCapabilities): void {
+        // Force disable `augmentsSyntaxTokens`, VSCode's textmate grammar is somewhat incomplete
+        // making the experience generally worse
+        const caps = capabilities.textDocument?.semanticTokens;
+        if (caps) {
+            caps.augmentsSyntaxTokens = false;
+        }
+    }
+    initialize(
+        _capabilities: lc.ServerCapabilities,
+        _documentSelector: lc.DocumentSelector | undefined
+    ): void {}
+    dispose(): void {}
+}
+
 function isCodeActionWithoutEditsAndCommands(value: any): boolean {
     const candidate: lc.CodeAction = value;
     return (