[UnifiedDataTable] Add gridStyle override support (#166994)

packages/kbn-unified-data-table/src/components/data_table.test.tsx

@@ -432,4 +432,37 @@ describe('UnifiedDataTable', () => {
       expect(tourStep).toEqual('test-expand');
     });
   });
+
+  describe('gridStyleOverride', () => {
+    it('should render the grid with the default style if no gridStyleOverride is provided', async () => {
+      const component = await getComponent({
+        ...getProps(),
+      });
+
+      const grid = findTestSubject(component, 'docTable');
+
+      expect(grid.hasClass('euiDataGrid--bordersHorizontal')).toBeTruthy();
+      expect(grid.hasClass('euiDataGrid--fontSizeSmall')).toBeTruthy();
+      expect(grid.hasClass('euiDataGrid--paddingLarge')).toBeTruthy();
+      expect(grid.hasClass('euiDataGrid--rowHoverHighlight')).toBeTruthy();
+      expect(grid.hasClass('euiDataGrid--headerUnderline')).toBeTruthy();
+      expect(grid.hasClass('euiDataGrid--stripes')).toBeTruthy();
+    });
+    it('should render the grid with style override if gridStyleOverride is provided', async () => {
+      const component = await getComponent({
+        ...getProps(),
+        gridStyleOverride: {
+          stripes: false,
+          rowHover: 'none',
+          border: 'none',
+        },
+      });
+
+      const grid = findTestSubject(component, 'docTable');
+
+      expect(grid.hasClass('euiDataGrid--stripes')).toBeFalsy();
+      expect(grid.hasClass('euiDataGrid--rowHoverHighlight')).toBeFalsy();
+      expect(grid.hasClass('euiDataGrid--bordersNone')).toBeTruthy();
+    });
+  });
 });

packages/kbn-unified-data-table/src/components/data_table.tsx

@@ -27,6 +27,7 @@ import {
   EuiDataGridControlColumn,
   EuiDataGridCustomBodyProps,
   EuiDataGridCellValueElementProps,
+  EuiDataGridStyle,
 } from '@elastic/eui';
 import type { DataView } from '@kbn/data-views-plugin/public';
 import {
@@ -282,6 +283,10 @@ export interface UnifiedDataTableProps {
    * Optional key/value pairs to set guided onboarding steps ids for a data table components included to guided tour.
    */
   componentsTourSteps?: Record<string, string>;
+  /**
+   * Optional gridStyle override.
+   */
+  gridStyleOverride?: EuiDataGridStyle;
 }
 
 export const EuiDataGridMemoized = React.memo(EuiDataGrid);
@@ -335,6 +340,7 @@ export const UnifiedDataTable = ({
   externalCustomRenderers,
   consumer = 'discover',
   componentsTourSteps,
+  gridStyleOverride,
 }: UnifiedDataTableProps) => {
   const { fieldFormats, toastNotifications, dataViewFieldEditor, uiSettings, storage, data } =
     services;
@@ -789,7 +795,7 @@ export const UnifiedDataTable = ({
             toolbarVisibility={toolbarVisibility}
             rowHeightsOptions={rowHeightsOptions}
             inMemory={inMemory}
-            gridStyle={GRID_STYLE}
+            gridStyle={gridStyleOverride ?? GRID_STYLE}
             renderCustomGridBody={renderCustomGridBody}
             trailingControlColumns={trailingControlColumns}
           />