Use a customEditors context key that lists custom editors

This allows commands/contributions to enable/disable themselves based matching against the list of custom editors

src/vs/workbench/contrib/customEditor/browser/commands.ts

@@ -17,7 +17,7 @@ import { EditorViewColumn, viewColumnToEditorGroup } from 'vs/workbench/api/comm
 import { IEditorCommandsContext } from 'vs/workbench/common/editor';
 import { CustomEditorInput } from 'vs/workbench/contrib/customEditor/browser/customEditorInput';
 import { defaultEditorId } from 'vs/workbench/contrib/customEditor/browser/customEditors';
-import { CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE, CONTEXT_HAS_CUSTOM_EDITORS, ICustomEditorService } from 'vs/workbench/contrib/customEditor/common/customEditor';
+import { CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE, CONTEXT_CUSTOM_EDITORS, ICustomEditorService } from 'vs/workbench/contrib/customEditor/common/customEditor';
 import { IEditorGroup, IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
 import type { ITextEditorOptions } from 'vs/platform/editor/common/editor';
@@ -80,7 +80,7 @@ MenuRegistry.appendMenuItem(MenuId.CommandPalette, {
 		title: REOPEN_WITH_TITLE,
 		category: viewCategory,
 	},
-	when: CONTEXT_HAS_CUSTOM_EDITORS,
+	when: CONTEXT_CUSTOM_EDITORS.notEqualsTo(''),
 });
 
 MenuRegistry.appendMenuItem(MenuId.EditorTitle, {
@@ -91,7 +91,7 @@ MenuRegistry.appendMenuItem(MenuId.EditorTitle, {
 	},
 	group: '6_reopen',
 	order: 20,
-	when: CONTEXT_HAS_CUSTOM_EDITORS,
+	when: CONTEXT_CUSTOM_EDITORS.notEqualsTo(''),
 });
 
 // #endregion
@@ -155,7 +155,7 @@ MenuRegistry.appendMenuItem(MenuId.EditorTitle, {
 	constructor() {
 		super({
 			id: ToggleCustomEditorCommand.ID,
-			precondition: CONTEXT_HAS_CUSTOM_EDITORS,
+			precondition: CONTEXT_CUSTOM_EDITORS,
 		});
 	}
 

src/vs/workbench/contrib/customEditor/browser/customEditors.ts

@@ -25,7 +25,7 @@ import { IWorkbenchContribution } from 'vs/workbench/common/contributions';
 import { EditorInput, EditorOptions, IEditor, IEditorInput } from 'vs/workbench/common/editor';
 import { DiffEditorInput } from 'vs/workbench/common/editor/diffEditorInput';
 import { webviewEditorsExtensionPoint } from 'vs/workbench/contrib/customEditor/browser/extensionPoint';
-import { CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE, CONTEXT_HAS_CUSTOM_EDITORS, CustomEditorInfo, CustomEditorInfoCollection, CustomEditorPriority, CustomEditorSelector, ICustomEditor, ICustomEditorService } from 'vs/workbench/contrib/customEditor/common/customEditor';
+import { CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE, CONTEXT_CUSTOM_EDITORS, CustomEditorInfo, CustomEditorInfoCollection, CustomEditorPriority, CustomEditorSelector, ICustomEditor, ICustomEditorService } from 'vs/workbench/contrib/customEditor/common/customEditor';
 import { CustomEditorModelManager } from 'vs/workbench/contrib/customEditor/common/customEditorModelManager';
 import { IWebviewService, webviewHasOwnEditFunctionsContext } from 'vs/workbench/contrib/webview/browser/webview';
 import { IEditorGroup, IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
@@ -98,7 +98,7 @@ export class CustomEditorService extends Disposable implements ICustomEditorServ
 
 	private readonly _models: CustomEditorModelManager;
 
-	private readonly _hasCustomEditor: IContextKey<boolean>;
+	private readonly _customEditorContextKey: IContextKey<string>;
 	private readonly _focusedCustomEditorIsEditable: IContextKey<boolean>;
 	private readonly _webviewHasOwnEditFunctions: IContextKey<boolean>;
 
@@ -118,7 +118,7 @@ export class CustomEditorService extends Disposable implements ICustomEditorServ
 
 		this._models = new CustomEditorModelManager(workingCopyService, labelService);
 
-		this._hasCustomEditor = CONTEXT_HAS_CUSTOM_EDITORS.bindTo(contextKeyService);
+		this._customEditorContextKey = CONTEXT_CUSTOM_EDITORS.bindTo(contextKeyService);
 		this._focusedCustomEditorIsEditable = CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE.bindTo(contextKeyService);
 		this._webviewHasOwnEditFunctions = webviewHasOwnEditFunctionsContext.bindTo(contextKeyService);
 
@@ -310,7 +310,7 @@ export class CustomEditorService extends Disposable implements ICustomEditorServ
 		const activeControl = this.editorService.activeControl;
 		const resource = activeControl?.input.resource;
 		if (!resource) {
-			this._hasCustomEditor.reset();
+			this._customEditorContextKey.reset();
 			this._focusedCustomEditorIsEditable.reset();
 			this._webviewHasOwnEditFunctions.reset();
 			return;
@@ -320,7 +320,7 @@ export class CustomEditorService extends Disposable implements ICustomEditorServ
 			...this.getContributedCustomEditors(resource).allEditors,
 			...this.getUserConfiguredCustomEditors(resource).allEditors,
 		];
-		this._hasCustomEditor.set(possibleEditors.length > 0);
+		this._customEditorContextKey.set(possibleEditors.map(x => x.id).join(','));
 		this._focusedCustomEditorIsEditable.set(activeControl?.input instanceof CustomEditorInput);
 		this._webviewHasOwnEditFunctions.set(possibleEditors.length > 0);
 	}

src/vs/workbench/contrib/customEditor/common/customEditor.ts

@@ -18,7 +18,7 @@ import { IWorkingCopy } from 'vs/workbench/services/workingCopy/common/workingCo
 
 export const ICustomEditorService = createDecorator<ICustomEditorService>('customEditorService');
 
-export const CONTEXT_HAS_CUSTOM_EDITORS = new RawContextKey<boolean>('hasCustomEditors', false);
+export const CONTEXT_CUSTOM_EDITORS = new RawContextKey<string>('customEditors', '');
 export const CONTEXT_FOCUSED_CUSTOM_EDITOR_IS_EDITABLE = new RawContextKey<boolean>('focusedCustomEditorIsEditable', false);
 
 export interface ICustomEditor {