only show accessbility view for ipynb files

Author: amunger

src/vs/workbench/contrib/notebook/browser/notebook.contribution.ts

@@ -29,7 +29,7 @@ import { NotebookEditor } from 'vs/workbench/contrib/notebook/browser/notebookEd
 import { NotebookEditorInput, NotebookEditorInputOptions } from 'vs/workbench/contrib/notebook/common/notebookEditorInput';
 import { INotebookService } from 'vs/workbench/contrib/notebook/common/notebookService';
 import { NotebookService } from 'vs/workbench/contrib/notebook/browser/services/notebookServiceImpl';
-import { CellKind, CellUri, IResolvedNotebookEditorModel, NotebookWorkingCopyTypeIdentifier, NotebookSetting, ICellOutput, ICell } from 'vs/workbench/contrib/notebook/common/notebookCommon';
+import { NOTEBOOK_EDITOR_ID, CellKind, CellUri, IResolvedNotebookEditorModel, NotebookWorkingCopyTypeIdentifier, NotebookSetting, ICellOutput, ICell } from 'vs/workbench/contrib/notebook/common/notebookCommon';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
 import { IUndoRedoService } from 'vs/platform/undoRedo/common/undoRedo';
 import { INotebookEditorModelResolverService } from 'vs/workbench/contrib/notebook/common/notebookEditorModelResolverService';
@@ -116,6 +116,7 @@ import { AccessibilityHelpAction, AccessibleViewAction } from 'vs/workbench/cont
 import { NOTEBOOK_IS_ACTIVE_EDITOR, NOTEBOOK_OUTPUT_FOCUSED } from 'vs/workbench/contrib/notebook/common/notebookContextKeys';
 import { runAccessibilityHelpAction, showAccessibleOutput } from 'vs/workbench/contrib/notebook/browser/notebookAccessibility';
 import { IAccessibleViewService } from 'vs/workbench/contrib/accessibility/browser/accessibleView';
+import { ContextKeyExpr } from 'vs/platform/contextkey/common/contextkey';
 
 /*--------------------------------------------------------------------------------------------- */
 
@@ -699,7 +700,9 @@ class NotebookAccessibleViewContribution extends Disposable {
 			const editorService = accessor.get(IEditorService);
 
 			return showAccessibleOutput(accessibleViewService, editorService);
-		}, NOTEBOOK_OUTPUT_FOCUSED));
+		},
+			ContextKeyExpr.and(NOTEBOOK_OUTPUT_FOCUSED, ContextKeyExpr.equals('resourceExtname', '.ipynb'))
+		));
 	}
 }