[Rating] Add support for CSS variables (#32556)

docs/pages/experiments/material-ui/rating.tsx

@@ -0,0 +1,87 @@
+import * as React from 'react';
+import {
+  Experimental_CssVarsProvider as CssVarsProvider,
+  useColorScheme,
+} from '@mui/material/styles';
+import CssBaseline from '@mui/material/CssBaseline';
+import Box from '@mui/material/Box';
+import Button from '@mui/material/Button';
+import Container from '@mui/material/Container';
+import Moon from '@mui/icons-material/DarkMode';
+import Sun from '@mui/icons-material/LightMode';
+import Typography from 'docs/src/pages/premium-themes/onepirate/modules/components/Typography';
+import { Rating } from '@mui/material';
+
+const ColorSchemePicker = () => {
+  const { mode, setMode } = useColorScheme();
+  const [mounted, setMounted] = React.useState(false);
+  React.useEffect(() => {
+    setMounted(true);
+  }, []);
+  if (!mounted) {
+    return null;
+  }
+
+  return (
+    <Button
+      variant="outlined"
+      onClick={() => {
+        if (mode === 'light') {
+          setMode('dark');
+        } else {
+          setMode('light');
+        }
+      }}
+    >
+      {mode === 'light' ? <Moon /> : <Sun />}
+    </Button>
+  );
+};
+
+export default function CssVarsTemplate() {
+  const [value, setValue] = React.useState<number | null>(2);
+
+  return (
+    <CssVarsProvider>
+      <CssBaseline />
+      <Container sx={{ my: 5 }}>
+        <Box sx={{ pb: 2 }}>
+          <ColorSchemePicker />
+        </Box>
+        <Box
+          sx={{
+            display: 'grid',
+            gridTemplateColumns: 'repeat(auto-fill, minmax(256px, 1fr))',
+            gridAutoRows: 'minmax(160px, auto)',
+            gap: 2,
+            '& > div': {
+              placeSelf: 'center',
+            },
+          }}
+        >
+          <Box>
+            <Typography component="legend">Developer Experience</Typography>
+            <Rating
+              name="simple-controlled"
+              value={value}
+              onChange={(event, newValue) => {
+                setValue(newValue);
+              }}
+            />
+          </Box>
+          <Box>
+            <Typography component="legend">Developer Experience</Typography>
+            <Rating
+              disabled
+              name="simple-controlled"
+              value={value}
+              onChange={(event, newValue) => {
+                setValue(newValue);
+              }}
+            />
+          </Box>
+        </Box>
+      </Container>
+    </CssVarsProvider>
+  );
+}

packages/mui-material/src/Rating/Rating.js

@@ -90,7 +90,7 @@ const RatingRoot = styled('span', {
   textAlign: 'left',
   WebkitTapHighlightColor: 'transparent',
   [`&.${ratingClasses.disabled}`]: {
-    opacity: theme.palette.action.disabledOpacity,
+    opacity: (theme.vars || theme).palette.action.disabledOpacity,
     pointerEvents: 'none',
   },
   [`&.${ratingClasses.focusVisible} .${ratingClasses.iconActive}`]: {
@@ -151,7 +151,7 @@ const RatingIcon = styled('span', {
     transform: 'scale(1.2)',
   }),
   ...(ownerState.iconEmpty && {
-    color: theme.palette.action.disabled,
+    color: (theme.vars || theme).palette.action.disabled,
   }),
 }));