Add support for filtering queries panel.

extensions/ql-vscode/src/extension.ts

@@ -790,7 +790,7 @@ async function activateWithInstalledDistribution(
   );
   ctx.subscriptions.push(databaseUI);
 
-  QueriesModule.initialize(app, cliServer);
+  QueriesModule.initialize(app, languageContext, cliServer);
 
   void extLogger.log("Initializing evaluator log viewer.");
   const evalLogViewer = new EvalLogViewer();

extensions/ql-vscode/src/queries-panel/queries-module.ts

@@ -6,6 +6,7 @@ import { DisposableObject } from "../common/disposable-object";
 import { QueriesPanel } from "./queries-panel";
 import { QueryDiscovery } from "./query-discovery";
 import { QueryPackDiscovery } from "./query-pack-discovery";
+import { LanguageContextStore } from "../language-context-store";
 
 export class QueriesModule extends DisposableObject {
   private queriesPanel: QueriesPanel | undefined;
@@ -16,16 +17,21 @@ export class QueriesModule extends DisposableObject {
 
   public static initialize(
     app: App,
+    languageContext: LanguageContextStore,
     cliServer: CodeQLCliServer,
   ): QueriesModule {
     const queriesModule = new QueriesModule(app);
     app.subscriptions.push(queriesModule);
 
-    queriesModule.initialize(app, cliServer);
+    queriesModule.initialize(app, languageContext, cliServer);
     return queriesModule;
   }
 
-  private initialize(app: App, cliServer: CodeQLCliServer): void {
+  private initialize(
+    app: App,
+    langauageContext: LanguageContextStore,
+    cliServer: CodeQLCliServer,
+  ): void {
     // Currently, we only want to expose the new panel when we are in canary mode
     // and the user has enabled the "Show queries panel" flag.
     if (!isCanary() || !showQueriesPanel()) {
@@ -38,8 +44,9 @@ export class QueriesModule extends DisposableObject {
     void queryPackDiscovery.initialRefresh();
 
     const queryDiscovery = new QueryDiscovery(
-      app.environment,
+      app,
       queryPackDiscovery,
+      langauageContext,
     );
     this.push(queryDiscovery);
     void queryDiscovery.initialRefresh();

extensions/ql-vscode/src/queries-panel/query-discovery.ts

@@ -1,6 +1,6 @@
 import { dirname, basename, normalize, relative } from "path";
 import { Event } from "vscode";
-import { EnvironmentContext } from "../common/app";
+import { App } from "../common/app";
 import {
   FileTreeDirectory,
   FileTreeLeaf,
@@ -11,6 +11,8 @@ import { FilePathDiscovery } from "../common/vscode/file-path-discovery";
 import { containsPath } from "../common/files";
 import { getOnDiskWorkspaceFoldersObjects } from "../common/vscode/workspace-folders";
 import { QueryLanguage } from "../common/query-language";
+import { LanguageContextStore } from "../language-context-store";
+import { AppEvent, AppEventEmitter } from "../common/events";
 
 const QUERY_FILE_EXTENSION = ".ql";
 
@@ -31,24 +33,36 @@ export class QueryDiscovery
   extends FilePathDiscovery<Query>
   implements QueryDiscoverer
 {
+  public readonly onDidChangeQueries: AppEvent<void>;
+  private readonly onDidChangeQueriesEmitter: AppEventEmitter<void>;
+
   constructor(
-    private readonly env: EnvironmentContext,
+    private readonly app: App,
     private readonly queryPackDiscovery: QueryPackDiscoverer,
+    private readonly languageContext: LanguageContextStore,
   ) {
     super("Query Discovery", `**/*${QUERY_FILE_EXTENSION}`);
 
+    // Set up event emitters
+    this.onDidChangeQueriesEmitter = this.push(app.createEventEmitter<void>());
+    this.onDidChangeQueries = this.onDidChangeQueriesEmitter.event;
+
+    // Handlers
     this.push(
       this.queryPackDiscovery.onDidChangeQueryPacks(
         this.recomputeAllData.bind(this),
       ),
     );
-  }
+    this.push(
-
+      this.onDidChangePathData(() => {
-  /**
+        this.onDidChangeQueriesEmitter.fire();
-   * Event that fires when the set of queries in the workspace changes.
+      }),
-   */
+    );
-  public get onDidChangeQueries(): Event<void> {
+    this.push(
-    return this.onDidChangePathData;
+      this.languageContext.onLanguageContextChanged(() => {
+        this.onDidChangeQueriesEmitter.fire();
+      }),
+    );
   }
 
   /**
@@ -64,8 +78,10 @@ export class QueryDiscovery
 
     const roots = [];
     for (const workspaceFolder of getOnDiskWorkspaceFoldersObjects()) {
-      const queriesInRoot = pathData.filter((query) =>
+      const queriesInRoot = pathData.filter(
-        containsPath(workspaceFolder.uri.fsPath, query.path),
+        (query) =>
+          containsPath(workspaceFolder.uri.fsPath, query.path) &&
+          this.languageContext.shouldInclude(query.language),
       );
       if (queriesInRoot.length === 0) {
         continue;
@@ -73,7 +89,7 @@ export class QueryDiscovery
       const root = new FileTreeDirectory<string>(
         workspaceFolder.uri.fsPath,
         workspaceFolder.name,
-        this.env,
+        this.app.environment,
       );
       for (const query of queriesInRoot) {
         const dirName = dirname(normalize(relative(root.path, query.path)));