[web] add disconnected state to offline indicator (#35378)

GitOrigin-RevId: 692dc16cee738a8b05353717044a4063c3dd8e8a

services/web/frontend/js/features/ide-react/components/toolbar/offline-indicator.tsx

@@ -1,6 +1,7 @@
 import { useTranslation } from 'react-i18next'
 import MaterialIcon from '@/shared/components/material-icon'
 import OLTooltip from '@/shared/components/ol/ol-tooltip'
+import { useIdeReactContext } from '@/features/ide-react/context/ide-react-context'
 
 export function OfflineIndicatorContent() {
   const { t } = useTranslation()
@@ -18,22 +19,49 @@ export function OfflineIndicatorContent() {
   )
 }
 
+export function DisconnectedIndicatorContent() {
+  const { t } = useTranslation()
+  return (
+    <div className="ide-redesign-toolbar-offline-indicator">
+      <MaterialIcon type="wifi_off" />
+      <span>{t('disconnected')}</span>
+    </div>
+  )
+}
+
+function OfflineIndicatorVisual({ outOfSync }: { outOfSync: boolean }) {
+  if (outOfSync) {
+    return <DisconnectedIndicatorContent />
+  }
+  return <OfflineIndicatorContent />
+}
+
+function OfflineIndicatorStatus({ outOfSync }: { outOfSync: boolean }) {
+  const { t } = useTranslation()
+  if (outOfSync) {
+    return <span>{t('disconnected')}</span>
+  }
+  return (
+    <>
+      <span>{t('you_re_offline')}</span>
+      <span>{t('changes_saved_in_browser_sync_when_online')}</span>
+    </>
+  )
+}
+
 export default function OfflineIndicator({
   isOffline,
 }: {
   isOffline: boolean
 }) {
-  const { t } = useTranslation()
+  const { outOfSync } = useIdeReactContext()
+  // The live region div below must stay mounted at all times so screen
+  // readers announce its contents when the offline state changes.
   return (
     <>
-      {isOffline && <OfflineIndicatorContent />}
+      {isOffline && <OfflineIndicatorVisual outOfSync={outOfSync} />}
       <div className="visually-hidden" role="status">
-        {isOffline && (
-          <>
-            <span>{t('you_re_offline')}</span>
-            <span>{t('changes_saved_in_browser_sync_when_online')}</span>
-          </>
-        )}
+        {isOffline && <OfflineIndicatorStatus outOfSync={outOfSync} />}
       </div>
     </>
   )