1 files changed, 16 insertions, 6 deletions

diff --git a/src/vs/workbench/contrib/extensions/browser/extensionsList.ts b/src/vs/workbench/contrib/extensions/browser/extensionsList.ts
index 1754e2233ab..84eaa15be18 100644
--- a/src/vs/workbench/contrib/extensions/browser/extensionsList.ts
+++ b/src/vs/workbench/contrib/extensions/browser/extensionsList.ts
@@ -13,7 +13,7 @@ import { IListVirtualDelegate } from 'vs/base/browser/ui/list/list';
 import { IPagedRenderer } from 'vs/base/browser/ui/list/listPaging';
 import { Event } from 'vs/base/common/event';
 import { IExtension, ExtensionContainers, ExtensionState, IExtensionsWorkbenchService } from 'vs/workbench/contrib/extensions/common/extensions';
-import { UpdateAction, ManageExtensionAction, ReloadAction, ExtensionStatusLabelAction, RemoteInstallAction, ExtensionStatusAction, LocalInstallAction, ActionWithDropDownAction, InstallDropdownAction, InstallingLabelAction, ExtensionActionWithDropdownActionViewItem, ExtensionDropDownAction, WebInstallAction, SwitchToPreReleaseVersionAction, SwitchToReleasedVersionAction, MigrateDeprecatedExtensionAction } from 'vs/workbench/contrib/extensions/browser/extensionsActions';
+import { UpdateAction, ManageExtensionAction, ReloadAction, ExtensionStatusLabelAction, RemoteInstallAction, ExtensionStatusAction, LocalInstallAction, ActionWithDropDownAction, InstallDropdownAction, InstallingLabelAction, ExtensionActionWithDropdownActionViewItem, ExtensionDropDownAction, WebInstallAction, SwitchToPreReleaseVersionAction, SwitchToReleasedVersionAction, MigrateDeprecatedExtensionAction, SetLanguageAction } from 'vs/workbench/contrib/extensions/browser/extensionsActions';
 import { areSameExtensions } from 'vs/platform/extensionManagement/common/extensionManagementUtil';
 import { RatingsWidget, InstallCountWidget, RecommendationWidget, RemoteBadgeWidget, ExtensionPackCountWidget as ExtensionPackBadgeWidget, SyncIgnoredWidget, ExtensionHoverWidget, ExtensionActivationStatusWidget, PreReleaseBookmarkWidget, extensionVerifiedPublisherIconColor } from 'vs/workbench/contrib/extensions/browser/extensionsWidgets';
 import { IExtensionService, toExtension } from 'vs/workbench/services/extensions/common/extensions';
@@ -123,6 +123,7 @@ export class Renderer implements IPagedRenderer<IExtension, ITemplateData> {
 			reloadAction,
 			this.instantiationService.createInstance(InstallDropdownAction),
 			this.instantiationService.createInstance(InstallingLabelAction),
+			this.instantiationService.createInstance(SetLanguageAction),
 			this.instantiationService.createInstance(RemoteInstallAction, false),
 			this.instantiationService.createInstance(LocalInstallAction),
 			this.instantiationService.createInstance(WebInstallAction),
@@ -186,16 +187,25 @@ export class Renderer implements IPagedRenderer<IExtension, ITemplateData> {
 
 		data.extensionDisposables = dispose(data.extensionDisposables);
 
-		const updateEnablement = async () => {
-			let disabled = false;
-			const deprecated = !!extension.deprecationInfo;
+		const computeEnablement = async () => {
 			if (extension.state === ExtensionState.Uninstalled) {
-				disabled = deprecated || !(await this.extensionsWorkbenchService.canInstall(extension));
+				if (!!extension.deprecationInfo) {
+					return true;
+				}
+				if (this.extensionsWorkbenchService.canSetLanguage(extension)) {
+					return false;
+				}
+				return !(await this.extensionsWorkbenchService.canInstall(extension));
 			} else if (extension.local && !isLanguagePackExtension(extension.local.manifest)) {
 				const runningExtensions = await this.extensionService.getExtensions();
 				const runningExtension = runningExtensions.filter(e => areSameExtensions({ id: e.identifier.value, uuid: e.uuid }, extension.identifier))[0];
-				disabled = !(runningExtension && extension.server === this.extensionManagementServerService.getExtensionManagementServer(toExtension(runningExtension)));
+				return !(runningExtension && extension.server === this.extensionManagementServerService.getExtensionManagementServer(toExtension(runningExtension)));
 			}
+			return false;
+		};
+		const updateEnablement = async () => {
+			const disabled = await computeEnablement();
+			const deprecated = !!extension.deprecationInfo;
 			data.element.classList.toggle('deprecated', deprecated);
 			data.root.classList.toggle('disabled', disabled);
 		};