Fix #66598

src/vs/workbench/api/browser/viewsExtensionPoint.ts

@@ -6,7 +6,7 @@
 import { localize } from 'vs/nls';
 import { forEach } from 'vs/base/common/collections';
 import { IJSONSchema } from 'vs/base/common/jsonSchema';
-import { ExtensionMessageCollector, ExtensionsRegistry, IExtensionPoint } from 'vs/workbench/services/extensions/common/extensionsRegistry';
+import { ExtensionMessageCollector, ExtensionsRegistry, IExtensionPoint, IExtensionPointUser } from 'vs/workbench/services/extensions/common/extensionsRegistry';
 import { ViewContainer, ViewsRegistry, ICustomViewDescriptor, IViewContainersRegistry, Extensions as ViewContainerExtensions } from 'vs/workbench/common/views';
 import { CustomTreeViewPanel, CustomTreeView } from 'vs/workbench/browser/parts/views/customView';
 import { ContextKeyExpr } from 'vs/platform/contextkey/common/contextkey';
@@ -82,11 +82,12 @@ const viewsContribution: IJSONSchema = {
 	}
 };
 
-
-const viewsExtensionPoint: IExtensionPoint<{ [loc: string]: IUserFriendlyViewDescriptor[] }> = ExtensionsRegistry.registerExtensionPoint<{ [loc: string]: IUserFriendlyViewDescriptor[] }>({
+type ViewExtensionPointType = { [loc: string]: IUserFriendlyViewDescriptor[] };
+const viewsExtensionPoint: IExtensionPoint<ViewExtensionPointType> = ExtensionsRegistry.registerExtensionPoint<ViewExtensionPointType>({
 	extensionPoint: 'views',
 	deps: [viewsContainersExtensionPoint],
-	jsonSchema: viewsContribution
+	jsonSchema: viewsContribution,
+	isDynamic: true
 });
 
 class ViewsContainersExtensionHandler implements IWorkbenchContribution {
@@ -101,8 +102,18 @@ class ViewsContainersExtensionHandler implements IWorkbenchContribution {
 	}
 
 	private handleAndRegisterCustomViews() {
-		viewsExtensionPoint.setHandler(extensions => {
-			for (let extension of extensions) {
+		viewsExtensionPoint.setHandler((extensions, { added, removed }) => {
+			if (removed.length) {
+				this.removeViews(removed);
+			}
+			if (added.length) {
+				this.addViews(added);
+			}
+		});
+	}
+
+	private addViews(extensions: IExtensionPointUser<ViewExtensionPointType>[]): void {
+		for (const extension of extensions) {
 			const { value, collector } = extension;
 
 			forEach(value, entry => {
@@ -137,7 +148,8 @@ class ViewsContainersExtensionHandler implements IWorkbenchContribution {
 						canToggleVisibility: true,
 						collapsed: this.showCollapsed(container),
 						treeView: this.instantiationService.createInstance(CustomTreeView, item.id, container),
-							order: ExtensionIdentifier.equals(extension.description.identifier, container.extensionId) ? index + 1 : undefined
+						order: ExtensionIdentifier.equals(extension.description.identifier, container.extensionId) ? index + 1 : undefined,
+						extensionId: extension.description.identifier
 					};
 
 					viewIds.push(viewDescriptor.id);
@@ -146,7 +158,16 @@ class ViewsContainersExtensionHandler implements IWorkbenchContribution {
 				ViewsRegistry.registerViews(viewDescriptors);
 			});
 		}
-		});
+	}
+
+	private removeViews(extensions: IExtensionPointUser<ViewExtensionPointType>[]): void {
+		const removedExtensions: Set<string> = extensions.reduce((result, e) => { result.add(ExtensionIdentifier.toKey(e.description.identifier)); return result; }, new Set<string>());
+		for (const viewContainer of this.viewContainersRegistry.all) {
+			const removedViews = ViewsRegistry.getViews(viewContainer).filter((v: ICustomViewDescriptor) => v.extensionId && removedExtensions.has(ExtensionIdentifier.toKey(v.extensionId)));
+			if (removedViews.length) {
+				ViewsRegistry.deregisterViews(removedViews.map(v => v.id), viewContainer);
+			}
+		}
 	}
 
 	private isValidViewDescriptors(viewDescriptors: IUserFriendlyViewDescriptor[], collector: ExtensionMessageCollector): boolean {
@@ -173,7 +194,6 @@ class ViewsContainersExtensionHandler implements IWorkbenchContribution {
 		return true;
 	}
 
-
 	private getViewContainer(value: string): ViewContainer {
 		switch (value) {
 			case 'explorer': return this.viewContainersRegistry.get(EXPLORER);

src/vs/workbench/common/views.ts

@@ -297,7 +297,7 @@ export interface IRevealOptions {
 export interface ICustomViewDescriptor extends IViewDescriptor {
 
 	readonly treeView: ITreeView;
-
+	readonly extensionId: ExtensionIdentifier;
 }
 
 export type TreeViewItemHandleArg = {