PanelChrome: Improve accessibility landmark markup (#85863)

* Add section and use Text component to get h2 for panel

* Remove heading when collapsible

* Make button text truncate

* Update test

* Remove labelledby as it is not needed anymore

* Use testid selectors in test

* Remove async

packages/grafana-e2e-selectors/src/selectors/components.ts

@@ -155,6 +155,7 @@ export const Components = {
   Panels: {
     Panel: {
       title: (title: string) => `data-testid Panel header ${title}`,
+      content: 'data-testid panel content',
       headerItems: (item: string) => `data-testid Panel header item ${item}`,
       menuItems: (item: string) => `data-testid Panel menu item ${item}`,
       menu: (title: string) => `data-testid Panel menu ${title}`,

packages/grafana-ui/src/components/PanelChrome/PanelChrome.test.tsx

@@ -3,6 +3,7 @@ import React from 'react';
 import { useToggle } from 'react-use';
 
 import { LoadingState } from '@grafana/data';
+import { selectors } from '@grafana/e2e-selectors';
 
 import { PanelChrome, PanelChromeProps } from './PanelChrome';
 
@@ -152,16 +153,17 @@ it('collapses the controlled panel when user clicks on the chevron or the title'
 
   expect(screen.getByText("Panel's Content")).toBeInTheDocument();
 
-  const button = screen.getByText('Default title');
+  const button = screen.getByRole('button', { name: 'Default title' });
+  const content = screen.getByTestId(selectors.components.Panels.Panel.content);
   // collapse button should have same aria-controls as the panel's content
-  expect(button.getAttribute('aria-controls')).toBe(button.parentElement?.parentElement?.nextElementSibling?.id);
+  expect(button.getAttribute('aria-controls')).toBe(content.id);
 
   fireEvent.click(button);
 
   expect(screen.queryByText("Panel's Content")).not.toBeInTheDocument();
   // aria-controls should be removed when panel is collapsed
   expect(button).not.toHaveAttribute('aria-controlls');
-  expect(button.parentElement?.parentElement?.nextElementSibling?.id).toBe(undefined);
+  expect(screen.queryByTestId(selectors.components.Panels.Panel.content)?.id).toBe(undefined);
 });
 
 it('collapses the uncontrolled panel when user clicks on the chevron or the title', () => {
@@ -169,14 +171,15 @@ it('collapses the uncontrolled panel when user clicks on the chevron or the titl
 
   expect(screen.getByText("Panel's Content")).toBeInTheDocument();
 
-  const button = screen.getByText('Default title');
+  const button = screen.getByRole('button', { name: 'Default title' });
+  const content = screen.getByTestId(selectors.components.Panels.Panel.content);
+
   // collapse button should have same aria-controls as the panel's content
-  expect(button.getAttribute('aria-controls')).toBe(button.parentElement?.parentElement?.nextElementSibling?.id);
+  expect(button.getAttribute('aria-controls')).toBe(content.id);
 
   fireEvent.click(button);
-
   expect(screen.queryByText("Panel's Content")).not.toBeInTheDocument();
   // aria-controls should be removed when panel is collapsed
   expect(button).not.toHaveAttribute('aria-controlls');
-  expect(button.parentElement?.parentElement?.nextElementSibling?.id).toBe(undefined);
+  expect(screen.queryByTestId(selectors.components.Panels.Panel.content)?.id).toBe(undefined);
 });

packages/grafana-ui/src/components/PanelChrome/PanelChrome.tsx

@@ -10,6 +10,7 @@ import { getFocusStyles } from '../../themes/mixins';
 import { DelayRender } from '../../utils/DelayRender';
 import { Icon } from '../Icon/Icon';
 import { LoadingBar } from '../LoadingBar/LoadingBar';
+import { Text } from '../Text/Text';
 import { Tooltip } from '../Tooltip';
 
 import { HoverWidget } from './HoverWidget';
@@ -167,14 +168,17 @@ export function PanelChrome({
     <>
       {/* Non collapsible title */}
       {!collapsible && title && (
-        <h6 title={typeof title === 'string' ? title : undefined} className={styles.title}>
+        <div className={styles.title}>
+          <Text element="h2" variant="h6" truncate title={typeof title === 'string' ? title : undefined}>
             {title}
-        </h6>
+          </Text>
+        </div>
       )}
 
       {/* Collapsible title */}
       {collapsible && (
-        <h6 className={styles.title}>
+        <div className={styles.title}>
+          <Text element="h2" variant="h6">
             <button
               type="button"
               className={styles.clearButtonStyles}
@@ -192,9 +196,12 @@ export function PanelChrome({
                 aria-hidden={!!title}
                 aria-label={!title ? 'toggle collapse panel' : undefined}
               />
+              <Text variant="h6" truncate>
                 {title}
+              </Text>
             </button>
-        </h6>
+          </Text>
+        </div>
       )}
 
       <div className={cx(styles.titleItems, dragClassCancel)} data-testid="title-items-container">
@@ -229,7 +236,7 @@ export function PanelChrome({
 
   return (
     // tabIndex={0} is needed for keyboard accessibility in the plot area
-    <div
+    <section
       className={cx(styles.container, { [styles.transparentContainer]: isPanelTransparent })}
       style={containerStyles}
       data-testid={testid}
@@ -287,13 +294,14 @@ export function PanelChrome({
       {!collapsed && (
         <div
           id={panelContentId}
+          data-testid={selectors.components.Panels.Panel.content}
           className={cx(styles.content, height === undefined && styles.containNone)}
           style={contentStyle}
         >
           {typeof children === 'function' ? children(innerWidth, innerHeight) : children}
         </div>
       )}
-    </div>
+    </section>
   );
 }
 
@@ -424,13 +432,11 @@ const getStyles = (theme: GrafanaTheme2) => {
     title: css({
       label: 'panel-title',
       display: 'flex',
-      marginBottom: 0, // override default h6 margin-bottom
       padding: theme.spacing(0, padding),
-      textOverflow: 'ellipsis',
+      minWidth: 0,
-      overflow: 'hidden',
+      '& > h2': {
-      whiteSpace: 'nowrap',
+        minWidth: 0,
-      fontSize: theme.typography.h6.fontSize,
+      },
-      fontWeight: theme.typography.h6.fontWeight,
     }),
     items: css({
       display: 'flex',
@@ -478,14 +484,9 @@ const getStyles = (theme: GrafanaTheme2) => {
       display: 'flex',
       gap: theme.spacing(0.5),
       background: 'transparent',
-      color: theme.colors.text.primary,
       border: 'none',
       padding: 0,
-      textOverflow: 'ellipsis',
+      maxWidth: '100%',
-      overflow: 'hidden',
-      whiteSpace: 'nowrap',
-      fontSize: theme.typography.h6.fontSize,
-      fontWeight: theme.typography.h6.fontWeight,
     }),
   };
 };