Wire up modeling panel empty states (#2915)

extensions/ql-vscode/package.json

@@ -1996,7 +1996,7 @@
           "id": "codeQLMethodModeling",
           "type": "webview",
           "name": "CodeQL Method Modeling",
-          "when": "config.codeQL.canary && config.codeQL.model.methodModelingView && codeql.modelEditorOpen && !codeql.modelEditorActive"
+          "when": "config.codeQL.canary && config.codeQL.model.methodModelingView"
         }
       ],
       "codeql-methods-usage": [

extensions/ql-vscode/src/common/interface-types.ts

@@ -577,6 +577,11 @@ interface SetModeledMethodMessage {
   method: ModeledMethod;
 }
 
+interface SetInModelingModeMessage {
+  t: "setInModelingMode";
+  inModelingMode: boolean;
+}
+
 interface RevealMethodMessage {
   t: "revealMethod";
   method: Method;
@@ -641,4 +646,5 @@ export type ToMethodModelingMessage =
   | SetMethodMessage
   | SetModeledMethodMessage
   | SetMethodModifiedMessage
-  | SetSelectedMethodMessage;
+  | SetSelectedMethodMessage
+  | SetInModelingModeMessage;

extensions/ql-vscode/src/model-editor/method-modeling/method-modeling-view-provider.ts

@@ -46,14 +46,16 @@ export class MethodModelingViewProvider extends AbstractWebviewViewProvider<
   }
 
   private setInitialState(): void {
-    const selectedMethod = this.modelingStore.getSelectedMethodDetails();
-    if (selectedMethod) {
-      void this.postMessage({
-        t: "setSelectedMethod",
-        method: selectedMethod.method,
-        modeledMethod: selectedMethod.modeledMethod,
-        isModified: selectedMethod.isModified,
-      });
+    if (this.modelingStore.hasStateForActiveDb()) {
+      const selectedMethod = this.modelingStore.getSelectedMethodDetails();
+      if (selectedMethod) {
+        void this.postMessage({
+          t: "setSelectedMethod",
+          method: selectedMethod.method,
+          modeledMethod: selectedMethod.modeledMethod,
+          isModified: selectedMethod.isModified,
+        });
+      }
     }
   }
 
@@ -165,5 +167,25 @@ export class MethodModelingViewProvider extends AbstractWebviewViewProvider<
         }
       }),
     );
+
+    this.push(
+      this.modelingStore.onDbOpened(async () => {
+        await this.postMessage({
+          t: "setInModelingMode",
+          inModelingMode: true,
+        });
+      }),
+    );
+
+    this.push(
+      this.modelingStore.onDbClosed(async () => {
+        if (!this.modelingStore.anyDbsBeingModeled()) {
+          await this.postMessage({
+            t: "setInModelingMode",
+            inModelingMode: false,
+          });
+        }
+      }),
+    );
   }
 }

extensions/ql-vscode/src/model-editor/model-editor-view.ts

@@ -100,9 +100,6 @@ export class ModelEditorView extends AbstractWebview<
     panel.onDidChangeViewState(async () => {
       if (panel.active) {
         this.modelingStore.setActiveDb(this.databaseItem);
-        await this.markModelEditorAsActive();
-      } else {
-        await this.updateModelEditorActiveContext();
       }
     });
 
@@ -126,36 +123,12 @@ export class ModelEditorView extends AbstractWebview<
     );
   }
 
-  private async markModelEditorAsActive(): Promise<void> {
-    void this.app.commands.execute(
-      "setContext",
-      "codeql.modelEditorActive",
-      true,
-    );
-  }
-
-  private async updateModelEditorActiveContext(): Promise<void> {
-    await this.app.commands.execute(
-      "setContext",
-      "codeql.modelEditorActive",
-      this.isAModelEditorActive(),
-    );
-  }
-
   private isAModelEditorOpen(): boolean {
     return window.tabGroups.all.some((tabGroup) =>
       tabGroup.tabs.some((tab) => this.isTabModelEditorView(tab)),
     );
   }
 
-  private isAModelEditorActive(): boolean {
-    return window.tabGroups.all.some((tabGroup) =>
-      tabGroup.tabs.some(
-        (tab) => this.isTabModelEditorView(tab) && tab.isActive,
-      ),
-    );
-  }
-
   private isTabModelEditorView(tab: Tab): boolean {
     if (!(tab.input instanceof TabInputWebview)) {
       return false;

extensions/ql-vscode/src/model-editor/modeling-store.ts

@@ -49,6 +49,7 @@ interface SelectedMethodChangedEvent {
 
 export class ModelingStore extends DisposableObject {
   public readonly onActiveDbChanged: AppEvent<void>;
+  public readonly onDbOpened: AppEvent<string>;
   public readonly onDbClosed: AppEvent<string>;
   public readonly onMethodsChanged: AppEvent<MethodsChangedEvent>;
   public readonly onHideModeledMethodsChanged: AppEvent<HideModeledMethodsChangedEvent>;
@@ -60,6 +61,7 @@ export class ModelingStore extends DisposableObject {
   private activeDb: string | undefined;
 
   private readonly onActiveDbChangedEventEmitter: AppEventEmitter<void>;
+  private readonly onDbOpenedEventEmitter: AppEventEmitter<string>;
   private readonly onDbClosedEventEmitter: AppEventEmitter<string>;
   private readonly onMethodsChangedEventEmitter: AppEventEmitter<MethodsChangedEvent>;
   private readonly onHideModeledMethodsChangedEventEmitter: AppEventEmitter<HideModeledMethodsChangedEvent>;
@@ -79,6 +81,9 @@ export class ModelingStore extends DisposableObject {
     );
     this.onActiveDbChanged = this.onActiveDbChangedEventEmitter.event;
 
+    this.onDbOpenedEventEmitter = this.push(app.createEventEmitter<string>());
+    this.onDbOpened = this.onDbOpenedEventEmitter.event;
+
     this.onDbClosedEventEmitter = this.push(app.createEventEmitter<string>());
     this.onDbClosed = this.onDbClosedEventEmitter.event;
 
@@ -123,6 +128,8 @@ export class ModelingStore extends DisposableObject {
       selectedMethod: undefined,
       selectedUsage: undefined,
     });
+
+    this.onDbOpenedEventEmitter.fire(dbUri);
   }
 
   public setActiveDb(databaseItem: DatabaseItem) {
@@ -154,6 +161,14 @@ export class ModelingStore extends DisposableObject {
     return this.state.get(this.activeDb);
   }
 
+  public hasStateForActiveDb(): boolean {
+    return !!this.getStateForActiveDb();
+  }
+
+  public anyDbsBeingModeled(): boolean {
+    return this.state.size > 0;
+  }
+
   public setMethods(dbItem: DatabaseItem, methods: Method[]) {
     const dbState = this.getState(dbItem);
     const dbUri = dbItem.databaseUri.toString();

extensions/ql-vscode/src/view/method-modeling/MethodModelingView.tsx

@@ -7,8 +7,12 @@ import { ToMethodModelingMessage } from "../../common/interface-types";
 import { assertNever } from "../../common/helpers-pure";
 import { ModeledMethod } from "../../model-editor/modeled-method";
 import { vscode } from "../vscode-api";
+import { NotInModelingMode } from "./NotInModelingMode";
+import { NoMethodSelected } from "./NoMethodSelected";
 
 export function MethodModelingView(): JSX.Element {
+  const [inModelingMode, setInModelingMode] = useState<boolean>(false);
+
   const [method, setMethod] = useState<Method | undefined>(undefined);
 
   const [modeledMethod, setModeledMethod] = React.useState<
@@ -27,6 +31,9 @@ export function MethodModelingView(): JSX.Element {
       if (evt.origin === window.origin) {
         const msg: ToMethodModelingMessage = evt.data;
         switch (msg.t) {
+          case "setInModelingMode":
+            setInModelingMode(msg.inModelingMode);
+            break;
           case "setMethod":
             setMethod(msg.method);
             break;
@@ -57,8 +64,12 @@ export function MethodModelingView(): JSX.Element {
     };
   }, []);
 
+  if (!inModelingMode) {
+    return <NotInModelingMode />;
+  }
+
   if (!method) {
-    return <>Select method to model</>;
+    return <NoMethodSelected />;
   }
 
   const onChange = (modeledMethod: ModeledMethod) => {