Improve modes

Signed-off-by: Charles de Dreuille <charles.dedreuille@gmail.com>

.storybook/modes.ts

@@ -15,4 +15,19 @@ export const allModes = {
     themeMode: 'dark',
     themeName: 'spotify',
   },
+  'light spotify neutral-1': {
+    themeMode: 'light',
+    themeName: 'spotify',
+    background: 'neutral-1',
+  },
+  'light spotify neutral-2': {
+    themeMode: 'light',
+    themeName: 'spotify',
+    background: 'neutral-2',
+  },
+  'light spotify neutral-3': {
+    themeMode: 'light',
+    themeName: 'spotify',
+    background: 'neutral-3',
+  },
 } as const;

.storybook/preview.tsx

@@ -3,14 +3,13 @@ import addonDocs from '@storybook/addon-docs';
 import addonThemes from '@storybook/addon-themes';
 import addonLinks from '@storybook/addon-links';
 import { definePreview } from '@storybook/react-vite';
-import { useEffect } from 'react';
+import React, { useEffect } from 'react';
 import { TestApiProvider } from '@backstage/test-utils';
 import { AlertDisplay } from '@backstage/core-components';
 import { apis } from './support/apis';
 import { useGlobals } from 'storybook/preview-api';
 import { UnifiedThemeProvider, themes } from '@backstage/theme';
 import { allModes } from './modes';
-import { Box } from '../packages/ui/src/components/Box';
 
 // Default Backstage theme CSS (from packages/ui)
 import '../packages/ui/src/css/styles.css';
@@ -20,6 +19,7 @@ import './storybook.css';
 
 // Custom themes
 import './themes/spotify.css';
+import { Box } from '../packages/ui/src/components/Box';
 
 export default definePreview({
   tags: ['manifest'],
@@ -31,8 +31,8 @@ export default definePreview({
       toolbar: {
         icon: 'circlehollow',
         items: [
-          { value: 'light', icon: 'circlehollow', title: 'Light' },
-          { value: 'dark', icon: 'circle', title: 'Dark' },
+          { value: 'light', icon: 'sun', title: 'Light' },
+          { value: 'dark', icon: 'moon', title: 'Dark' },
         ],
         dynamicTitle: true,
       },
@@ -50,11 +50,26 @@ export default definePreview({
         dynamicTitle: true,
       },
     },
+    background: {
+      name: 'Background',
+      description: 'Global background for components',
+      defaultValue: 'app',
+      toolbar: {
+        icon: 'contrast',
+        items: [
+          { value: 'app', title: 'App Background' },
+          { value: 'neutral-1', title: 'Neutral 1 Background' },
+          { value: 'neutral-2', title: 'Neutral 2 Background' },
+          { value: 'neutral-3', title: 'Neutral 3 Background' },
+        ],
+      },
+    },
   },
 
   initialGlobals: {
     themeMode: 'light',
     themeName: 'backstage',
+    background: 'app',
   },
 
   parameters: {
@@ -127,6 +142,8 @@ export default definePreview({
         globals.themeMode === 'light' ? themes.light : themes.dark;
       const selectedThemeMode = globals.themeMode || 'light';
       const selectedThemeName = globals.themeName || 'backstage';
+      const selectedBackground = globals.background || 'app';
+      const isFullscreen = context.parameters.layout === 'fullscreen';
 
       useEffect(() => {
         document.body.removeAttribute('data-theme-mode');
@@ -140,47 +157,34 @@ export default definePreview({
       }, [selectedTheme, selectedThemeName]);
 
       document.body.style.backgroundColor = 'var(--bui-bg-app)';
+      document.body.style.padding =
+        isFullscreen && selectedBackground !== 'app' ? '1rem' : '';
       const docsStoryElements = document.getElementsByClassName('docs-story');
       Array.from(docsStoryElements).forEach(element => {
         (element as HTMLElement).style.backgroundColor = 'var(--bui-bg-app)';
       });
 
-      const content = (
+      return (
         <UnifiedThemeProvider theme={selectedTheme}>
           {/* @ts-ignore */}
           <TestApiProvider apis={apis}>
             <AlertDisplay />
-            <Story />
+            {Array.from({
+              length:
+                selectedBackground === 'app'
+                  ? 0
+                  : parseInt(selectedBackground.split('-')[1], 10),
+            }).reduce<React.ReactNode>(
+              children => (
+                <Box bg="neutral-auto" p="4">
+                  {children}
+                </Box>
+              ),
+              <Story />,
+            )}
           </TestApiProvider>
         </UnifiedThemeProvider>
       );
-
-      if (selectedThemeName !== 'spotify') {
-        return content;
-      }
-
-      const layout = context.parameters?.layout ?? 'padded';
-      const isFullscreen = context.parameters?.layout === 'fullscreen';
-
-      return (
-        <Box
-          bg="neutral-1"
-          style={{
-            minHeight: 'calc(100vh - 32px)',
-            width: 'calc(100vw - 32px)',
-            borderRadius: 'var(--bui-radius-3)',
-            ...(layout === 'centered' && {
-              display: 'flex',
-              alignItems: 'center',
-              justifyContent: 'center',
-            }),
-          }}
-          p="4"
-          m={isFullscreen ? '4' : '0'}
-        >
-          {content}
-        </Box>
-      );
     },
   ],