[IDEA-328501] Support semantic highlighting for Dart / Support Rainbow Variables for Dart

[Locter9001]

Have you checked the issues and discussions to ensure there are no duplicates?

Yes

Your programming languages

Dart

Free or paid?

Paid users

Expected Behavior

Dart variables color

Code snippet for test

import 'package:flutter/material.dart';
import 'dart:io';

class WiFiSerialCommunication extends StatefulWidget {
  @override
  _WiFiSerialCommunicationState createState() => _WiFiSerialCommunicationState();
}

class _WiFiSerialCommunicationState extends State<WiFiSerialCommunication> {
  Socket? _socket;

  void connectToDevice(String ip, int port) async {
    try {
      _socket = await Socket.connect(ip, port);
      print('Connected to: ${_socket!.remoteAddress.address}:${_socket!.remotePort}');

      // Listen for responses from the server
      _socket!.listen((data) {
        print('Received: ${String.fromCharCodes(data)}');
      });
    } catch (e) {
      print('Failed to connect: $e');
    }
  }

  void sendMessage(String message) {
    if (_socket != null) {
      _socket!.add(utf8.encode(message));
    }
  }

  @override
  void dispose() {
    _socket?.close();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Wi-Fi Serial Communication'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: () {
                connectToDevice('192.168.1.100', 23); // Replace with your device IP and port
              },
              child: Text('Connect to Device'),
            ),
            ElevatedButton(
              onPressed: () {
                sendMessage('Hello Device');
              },
              child: Text('Send Message'),
            ),
          ],
        ),
      ),
    );
  }
}

Your Environment

Android Studio Koala | 2024.1.1 RC 1
Build #AI-241.15989.150.2411.11887322, built on May 25, 2024
Runtime version: 17.0.10+0--11609105 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11.0
GC: G1 Young Generation, G1 Old Generation
Memory: 3072M
Cores: 20
Registry:
debugger.new.tool.window.layout=true
ide.experimental.ui=true
terminal.new.ui=true
Non-Bundled Plugins:
com.intellij.marketplace (241.15989.199)
Dart (241.17502)
izhangzhihao.rainbow.brackets (2024.2.4-241)
io.flutter (79.2.3)
cn.yiiguxing.plugin.translate (3.6.1)

[izhangzhihao]

I made some searches, I found that: IDEA-328501 Support semantic highlighting for Dart opened 7 years before.

So, without IDE's support, I can only do rule-based syntax highlighting, similar issues may happen like #2709

Currently, a modified version:

intellij-rainbow-brackets-2024.2.4-241.zip