fix #104176. more editing metadata protection.

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

@@ -799,7 +799,7 @@ registerAction2(class extends NotebookCellAction {
 		clipboardService.writeText(context.cell.getText());
 		const viewModel = context.notebookEditor.viewModel;
 
-		if (!viewModel) {
+		if (!viewModel || !viewModel.metadata.editable) {
 			return;
 		}
 
@@ -828,7 +828,7 @@ registerAction2(class extends NotebookAction {
 
 		const viewModel = context.notebookEditor.viewModel;
 
-		if (!viewModel) {
+		if (!viewModel || !viewModel.metadata.editable) {
 			return;
 		}
 
@@ -884,7 +884,7 @@ registerAction2(class extends NotebookCellAction {
 
 		const viewModel = context.notebookEditor.viewModel;
 
-		if (!viewModel) {
+		if (!viewModel || !viewModel.metadata.editable) {
 			return;
 		}
 

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

@@ -1193,12 +1193,20 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 	}
 
 	async splitNotebookCell(cell: ICellViewModel): Promise<CellViewModel[] | null> {
+		if (!this._notebookViewModel!.metadata.editable) {
+			return null;
+		}
+
 		const index = this._notebookViewModel!.getCellIndex(cell);
 
 		return this._notebookViewModel!.splitNotebookCell(index);
 	}
 
 	async joinNotebookCells(cell: ICellViewModel, direction: 'above' | 'below', constraint?: CellKind): Promise<ICellViewModel | null> {
+		if (!this._notebookViewModel!.metadata.editable) {
+			return null;
+		}
+
 		const index = this._notebookViewModel!.getCellIndex(cell);
 		const ret = await this._notebookViewModel!.joinNotebookCells(index, direction, constraint);