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Я хочу обнаружить смайлики в текстах. И я хочу разделить текст, сохранив эти смайлики. Потому что смайлики и тексты должны быть разного размера в текстовых полях.

Для этого я использую регулярное выражение в Flutter. Но это слишком сильно нарушает некоторые смайлики, как показано в примере ниже:

 RegExp regex = RegExp("((?<=(?:[u2700-u27bf]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?(?:u200d(?:[^ud800-udfff]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?)*)|(?=(?:[u2700-u27bf]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?(?:u200d(?:[^ud800-udfff]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?)*))");

String myText = 'Hello 🇦🇨 Normal Skin 🤚  Dark Skin 👈🏾 Anything';

List<String> tryList = tryText.split(regex); 

print(tryList); // [Hello , 🇦, 🇨,  Normal Skin , 🤚,   Dark Skin , 👈, 🏾,  Anything]
 

Это выглядит так в результате его операций. Чтобы быть более наглядным, ожидаемый результат должен выглядеть следующим образом. Поскольку некоторые смайлики состоят из многих символов, как вы можете написать регулярное выражение, которое будет разделять их меньше?

 List<String> currentResult = [Hello , 🇦, 🇨,  Normal Skin , 🤚,   Dark Skin , 👈, 🏾,  Anything];
List<String> hopedResult = [Hello ,🇦🇨, Normal Skin ,🤚,  Dark Skin ,👈🏾, Anything];
 

Если кто-то хочет поработать над этим, вот пробные коды.

 import 'package:flutter/material.dart';

EmojiDetect extends StatefulWidget {
  @override
  _EmojiDetectState createState() => _EmojiDetectState();
}

class _EmojiDetectState extends State<EmojiDetect> {
  RegExp regex = RegExp("((?<=(?:[u2700-u27bf]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?(?:u200d(?:[^ud800-udfff]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?)*)|(?=(?:[u2700-u27bf]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?(?:u200d(?:[^ud800-udfff]|(?:ud83c[udde6-uddff]){2}|[ud800-udbff][udc00-udfff])[ufe0eufe0f]?(?:[u0300-u036fufe20-ufe23u20d0-u20f0]|ud83c[udffb-udfff])?)*))");

   String tryText = 'Hello 🇦🇨 Normal Skin 🤚  Dark Skin 👈🏾 Anything';

 @override
 Widget build(BuildContext context) {
  List<String> tryList = tryText.split(regex);
  print(tryList);

 return Scaffold(
  appBar: AppBar(
    title: Text('Emoji Detect'),
  ),

  body: Column(
    mainAxisAlignment: MainAxisAlignment.spaceEvenly,

    children: [
      Text(tryText, style: TextStyle(fontSize: 24, color: Colors.black), textAlign: TextAlign.center,),

      RichText(
        textAlign: TextAlign.center,
        text: TextSpan(
            children: tryList.map((e) => TextSpan(text: e, style: TextStyle(fontSize: 24, color: Colors.black))).toList(),
        ),
      ),
    ],
  ),
);
}}
 

Для разделения строки по смайликам можно использовать следующую функцию:

 List<String> splitByEmoji(String text) {

  //RegEx from: https://github.com/i-Naji/emojis
  final regex = RegExp(
      '(u{D83C}u{DFF4}u{DB40}u{DC67}u{DB40}u{DC62}(?:u{DB40}u{DC77}u{DB40}u{DC6C}u{DB40}u{DC73}|u{DB40}u{DC73}u{DB40}u{DC63}u{DB40}u{DC74}|u{DB40}u{DC65}u{DB40}u{DC6E}u{DB40}u{DC67})u{DB40}u{DC7F}|u{D83D}u{DC69}u{200D}u{D83D}u{DC69}u{200D}(?:u{D83D}u{DC66}u{200D}u{D83D}u{DC66}|u{D83D}u{DC67}u{200D}(?:u{D83D}[u{DC66}u{DC67}]))|u{D83D}u{DC68}(?:u{D83C}u{DFFF}u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83D}u{DC68}(?:u{D83C}[u{DFFB}-u{DFFE}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFE}u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83D}u{DC68}(?:u{D83C}[u{DFFB}-u{DFFD}u{DFFF}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFD}u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83D}u{DC68}(?:u{D83C}[u{DFFB}u{DFFC}u{DFFE}u{DFFF}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFC}u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83D}u{DC68}(?:u{D83C}[u{DFFB}u{DFFD}-u{DFFF}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFB}u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83D}u{DC68}(?:u{D83C}[u{DFFC}-u{DFFF}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{200D}(?:u{2764}u{FE0F}u{200D}(?:u{D83D}u{DC8B}u{200D})?u{D83D}u{DC68}|(?:u{D83D}[u{DC68}u{DC69}])u{200D}(?:u{D83D}u{DC66}u{200D}u{D83D}u{DC66}|u{D83D}u{DC67}u{200D}(?:u{D83D}[u{DC66}u{DC67}]))|u{D83D}u{DC66}u{200D}u{D83D}u{DC66}|u{D83D}u{DC67}u{200D}(?:u{D83D}[u{DC66}u{DC67}])|(?:u{D83D}[u{DC68}u{DC69}])u{200D}(?:u{D83D}[u{DC66}u{DC67}])|[u{2695}u{2696}u{2708}]u{FE0F}|u{D83D}[u{DC66}u{DC67}]|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|(?:u{D83C}u{DFFF}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFE}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFD}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFC}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFB}u{200D}[u{2695}u{2696}u{2708}])u{FE0F}|u{D83C}[u{DFFB}-u{DFFF}])|u{D83E}u{DDD1}(?:(?:u{D83C}[u{DFFB}-u{DFFF}])u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83E}u{DDD1}(?:u{D83C}[u{DFFB}-u{DFFF}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF84}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{200D}(?:u{D83E}u{DD1D}u{200D}u{D83E}u{DDD1}|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF84}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}]))|u{D83D}u{DC69}(?:u{200D}(?:u{2764}u{FE0F}u{200D}(?:u{D83D}u{DC8B}u{200D}(?:u{D83D}[u{DC68}u{DC69}])|u{D83D}[u{DC68}u{DC69}])|u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFF}u{200D}(?:u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFE}u{200D}(?:u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFD}u{200D}(?:u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFC}u{200D}(?:u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}])|u{D83C}u{DFFB}u{200D}(?:u{D83C}[u{DF3E}u{DF73}u{DF7C}u{DF93}u{DFA4}u{DFA8}u{DFEB}u{DFED}]|u{D83D}[u{DCBB}u{DCBC}u{DD27}u{DD2C}u{DE80}u{DE92}]|u{D83E}[u{DDAF}-u{DDB3}u{DDBC}u{DDBD}]))|u{D83D}u{DC69}u{D83C}u{DFFF}u{200D}u{D83E}u{DD1D}u{200D}(?:u{D83D}[u{DC68}u{DC69}])(?:u{D83C}[u{DFFB}-u{DFFE}])|u{D83D}u{DC69}u{D83C}u{DFFE}u{200D}u{D83E}u{DD1D}u{200D}(?:u{D83D}[u{DC68}u{DC69}])(?:u{D83C}[u{DFFB}-u{DFFD}u{DFFF}])|u{D83D}u{DC69}u{D83C}u{DFFD}u{200D}u{D83E}u{DD1D}u{200D}(?:u{D83D}[u{DC68}u{DC69}])(?:u{D83C}[u{DFFB}u{DFFC}u{DFFE}u{DFFF}])|u{D83D}u{DC69}u{D83C}u{DFFC}u{200D}u{D83E}u{DD1D}u{200D}(?:u{D83D}[u{DC68}u{DC69}])(?:u{D83C}[u{DFFB}u{DFFD}-u{DFFF}])|u{D83D}u{DC69}u{D83C}u{DFFB}u{200D}u{D83E}u{DD1D}u{200D}(?:u{D83D}[u{DC68}u{DC69}])(?:u{D83C}[u{DFFC}-u{DFFF}])|u{D83D}u{DC69}u{200D}u{D83D}u{DC66}u{200D}u{D83D}u{DC66}|u{D83D}u{DC69}u{200D}u{D83D}u{DC69}u{200D}(?:u{D83D}[u{DC66}u{DC67}])|(?:u{D83D}u{DC41}u{FE0F}u{200D}u{D83D}u{DDE8}|u{D83D}u{DC69}(?:u{D83C}u{DFFF}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFE}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFD}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFC}u{200D}[u{2695}u{2696}u{2708}]|u{D83C}u{DFFB}u{200D}[u{2695}u{2696}u{2708}]|u{200D}[u{2695}u{2696}u{2708}])|u{D83C}u{DFF3}u{FE0F}u{200D}u{26A7}|u{D83E}u{DDD1}(?:(?:u{D83C}[u{DFFB}-u{DFFF}])u{200D}[u{2695}u{2696}u{2708}]|u{200D}[u{2695}u{2696}u{2708}])|u{D83D}u{DC3B}u{200D}u{2744}|(?:u{D83C}[u{DFC3}u{DFC4}u{DFCA}]|u{D83D}[u{DC6E}u{DC70}u{DC71}u{DC73}u{DC77}u{DC81}u{DC82}u{DC86}u{DC87}u{DE45}-u{DE47}u{DE4B}u{DE4D}u{DE4E}u{DEA3}u{DEB4}-u{DEB6}]|u{D83E}[u{DD26}u{DD35}u{DD37}-u{DD39}u{DD3D}u{DD3E}u{DDB8}u{DDB9}u{DDCD}-u{DDCF}u{DDD6}-u{DDDD}])(?:u{D83C}[u{DFFB}-u{DFFF}])u{200D}[u{2640}u{2642}]|(?:u{26F9}|u{D83C}[u{DFCB}u{DFCC}]|u{D83D}u{DD75})(?:u{FE0F}u{200D}[u{2640}u{2642}]|(?:u{D83C}[u{DFFB}-u{DFFF}])u{200D}[u{2640}u{2642}])|u{D83C}u{DFF4}u{200D}u{2620}|(?:u{D83C}[u{DFC3}u{DFC4}u{DFCA}]|u{D83D}[u{DC6E}-u{DC71}u{DC73}u{DC77}u{DC81}u{DC82}u{DC86}u{DC87}u{DE45}-u{DE47}u{DE4B}u{DE4D}u{DE4E}u{DEA3}u{DEB4}-u{DEB6}]|u{D83E}[u{DD26}u{DD35}u{DD37}-u{DD39}u{DD3C}-u{DD3E}u{DDB8}u{DDB9}u{DDCD}-u{DDCF}u{DDD6}-u{DDDF}])u{200D}[u{2640}u{2642}])u{FE0F}|u{D83D}u{DC69}u{200D}u{D83D}u{DC67}u{200D}(?:u{D83D}[u{DC66}u{DC67}])|u{D83C}u{DFF3}u{FE0F}u{200D}u{D83C}u{DF08}|u{D83D}u{DC69}u{200D}u{D83D}u{DC67}|u{D83D}u{DC69}u{200D}u{D83D}u{DC66}|u{D83D}u{DC15}u{200D}u{D83E}u{DDBA}|u{D83C}u{DDFD}u{D83C}u{DDF0}|u{D83C}u{DDF6}u{D83C}u{DDE6}|u{D83C}u{DDF4}u{D83C}u{DDF2}|u{D83D}u{DC08}u{200D}u{2B1B}|u{D83E}u{DDD1}(?:u{D83C}[u{DFFB}-u{DFFF}])|u{D83D}u{DC69}(?:u{D83C}[u{DFFB}-u{DFFF}])|u{D83C}u{DDFF}(?:u{D83C}[u{DDE6}u{DDF2}u{DDFC}])|u{D83C}u{DDFE}(?:u{D83C}[u{DDEA}u{DDF9}])|u{D83C}u{DDFC}(?:u{D83C}[u{DDEB}u{DDF8}])|u{D83C}u{DDFB}(?:u{D83C}[u{DDE6}u{DDE8}u{DDEA}u{DDEC}u{DDEE}u{DDF3}u{DDFA}])|u{D83C}u{DDFA}(?:u{D83C}[u{DDE6}u{DDEC}u{DDF2}u{DDF3}u{DDF8}u{DDFE}u{DDFF}])|u{D83C}u{DDF9}(?:u{D83C}[u{DDE6}u{DDE8}u{DDE9}u{DDEB}-u{DDED}u{DDEF}-u{DDF4}u{DDF7}u{DDF9}u{DDFB}u{DDFC}u{DDFF}])|u{D83C}u{DDF8}(?:u{D83C}[u{DDE6}-u{DDEA}u{DDEC}-u{DDF4}u{DDF7}-u{DDF9}u{DDFB}u{DDFD}-u{DDFF}])|u{D83C}u{DDF7}(?:u{D83C}[u{DDEA}u{DDF4}u{DDF8}u{DDFA}u{DDFC}])|u{D83C}u{DDF5}(?:u{D83C}[u{DDE6}u{DDEA}-u{DDED}u{DDF0}-u{DDF3}u{DDF7}-u{DDF9}u{DDFC}u{DDFE}])|u{D83C}u{DDF3}(?:u{D83C}[u{DDE6}u{DDE8}u{DDEA}-u{DDEC}u{DDEE}u{DDF1}u{DDF4}u{DDF5}u{DDF7}u{DDFA}u{DDFF}])|u{D83C}u{DDF2}(?:u{D83C}[u{DDE6}u{DDE8}-u{DDED}u{DDF0}-u{DDFF}])|u{D83C}u{DDF1}(?:u{D83C}[u{DDE6}-u{DDE8}u{DDEE}u{DDF0}u{DDF7}-u{DDFB}u{DDFE}])|u{D83C}u{DDF0}(?:u{D83C}[u{DDEA}u{DDEC}-u{DDEE}u{DDF2}u{DDF3}u{DDF5}u{DDF7}u{DDFC}u{DDFE}u{DDFF}])|u{D83C}u{DDEF}(?:u{D83C}[u{DDEA}u{DDF2}u{DDF4}u{DDF5}])|u{D83C}u{DDEE}(?:u{D83C}[u{DDE8}-u{DDEA}u{DDF1}-u{DDF4}u{DDF6}-u{DDF9}])|u{D83C}u{DDED}(?:u{D83C}[u{DDF0}u{DDF2}u{DDF3}u{DDF7}u{DDF9}u{DDFA}])|u{D83C}u{DDEC}(?:u{D83C}[u{DDE6}u{DDE7}u{DDE9}-u{DDEE}u{DDF1}-u{DDF3}u{DDF5}-u{DDFA}u{DDFC}u{DDFE}])|u{D83C}u{DDEB}(?:u{D83C}[u{DDEE}-u{DDF0}u{DDF2}u{DDF4}u{DDF7}])|u{D83C}u{DDEA}(?:u{D83C}[u{DDE6}u{DDE8}u{DDEA}u{DDEC}u{DDED}u{DDF7}-u{DDFA}])|u{D83C}u{DDE9}(?:u{D83C}[u{DDEA}u{DDEC}u{DDEF}u{DDF0}u{DDF2}u{DDF4}u{DDFF}])|u{D83C}u{DDE8}(?:u{D83C}[u{DDE6}u{DDE8}u{DDE9}u{DDEB}-u{DDEE}u{DDF0}-u{DDF5}u{DDF7}u{DDFA}-u{DDFF}])|u{D83C}u{DDE7}(?:u{D83C}[u{DDE6}u{DDE7}u{DDE9}-u{DDEF}u{DDF1}-u{DDF4}u{DDF6}-u{DDF9}u{DDFB}u{DDFC}u{DDFE}u{DDFF}])|u{D83C}u{DDE6}(?:u{D83C}[u{DDE8}-u{DDEC}u{DDEE}u{DDF1}u{DDF2}u{DDF4}u{DDF6}-u{DDFA}u{DDFC}u{DDFD}u{DDFF}])|[#\*0-9]u{FE0F}u{20E3}|(?:u{D83C}[u{DFC3}u{DFC4}u{DFCA}]|u{D83D}[u{DC6E}u{DC70}u{DC71}u{DC73}u{DC77}u{DC81}u{DC82}u{DC86}u{DC87}u{DE45}-u{DE47}u{DE4B}u{DE4D}u{DE4E}u{DEA3}u{DEB4}-u{DEB6}]|u{D83E}[u{DD26}u{DD35}u{DD37}-u{DD39}u{DD3D}u{DD3E}u{DDB8}u{DDB9}u{DDCD}-u{DDCF}u{DDD6}-u{DDDD}])(?:u{D83C}[u{DFFB}-u{DFFF}])|(?:u{26F9}|u{D83C}[u{DFCB}u{DFCC}]|u{D83D}u{DD75})(?:u{D83C}[u{DFFB}-u{DFFF}])|(?:[u{261D}u{270A}-u{270D}]|u{D83C}[u{DF85}u{DFC2}u{DFC7}]|u{D83D}[u{DC42}u{DC43}u{DC46}-u{DC50}u{DC66}u{DC67}u{DC6B}-u{DC6D}u{DC72}u{DC74}-u{DC76}u{DC78}u{DC7C}u{DC83}u{DC85}u{DCAA}u{DD74}u{DD7A}u{DD90}u{DD95}u{DD96}u{DE4C}u{DE4F}u{DEC0}u{DECC}]|u{D83E}[u{DD0C}u{DD0F}u{DD18}-u{DD1C}u{DD1E}u{DD1F}u{DD30}-u{DD34}u{DD36}u{DD77}u{DDB5}u{DDB6}u{DDBB}u{DDD2}-u{DDD5}])(?:u{D83C}[u{DFFB}-u{DFFF}])|(?:[u{231A}u{231B}u{23E9}-u{23EC}u{23F0}u{23F3}u{25FD}u{25FE}u{2614}u{2615}u{2648}-u{2653}u{267F}u{2693}u{26A1}u{26AA}u{26AB}u{26BD}u{26BE}u{26C4}u{26C5}u{26CE}u{26D4}u{26EA}u{26F2}u{26F3}u{26F5}u{26FA}u{26FD}u{2705}u{270A}u{270B}u{2728}u{274C}u{274E}u{2753}-u{2755}u{2757}u{2795}-u{2797}u{27B0}u{27BF}u{2B1B}u{2B1C}u{2B50}u{2B55}]|u{D83C}[u{DC04}u{DCCF}u{DD8E}u{DD91}-u{DD9A}u{DDE6}-u{DDFF}u{DE01}u{DE1A}u{DE2F}u{DE32}-u{DE36}u{DE38}-u{DE3A}u{DE50}u{DE51}u{DF00}-u{DF20}u{DF2D}-u{DF35}u{DF37}-u{DF7C}u{DF7E}-u{DF93}u{DFA0}-u{DFCA}u{DFCF}-u{DFD3}u{DFE0}-u{DFF0}u{DFF4}u{DFF8}-u{DFFF}]|u{D83D}[u{DC00}-u{DC3E}u{DC40}u{DC42}-u{DCFC}u{DCFF}-u{DD3D}u{DD4B}-u{DD4E}u{DD50}-u{DD67}u{DD7A}u{DD95}u{DD96}u{DDA4}u{DDFB}-u{DE4F}u{DE80}-u{DEC5}u{DECC}u{DED0}-u{DED2}u{DED5}-u{DED7}u{DEEB}u{DEEC}u{DEF4}-u{DEFC}u{DFE0}-u{DFEB}]|u{D83E}[u{DD0C}-u{DD3A}u{DD3C}-u{DD45}u{DD47}-u{DD78}u{DD7A}-u{DDCB}u{DDCD}-u{DDFF}u{DE70}-u{DE74}u{DE78}-u{DE7A}u{DE80}-u{DE86}u{DE90}-u{DEA8}u{DEB0}-u{DEB6}u{DEC0}-u{DEC2}u{DED0}-u{DED6}])|(?:[#\*0-9\xA9\xAEu{203C}u{2049}u{2122}u{2139}u{2194}-u{2199}u{21A9}u{21AA}u{231A}u{231B}u{2328}u{23CF}u{23E9}-u{23F3}u{23F8}-u{23FA}u{24C2}u{25AA}u{25AB}u{25B6}u{25C0}u{25FB}-u{25FE}u{2600}-u{2604}u{260E}u{2611}u{2614}u{2615}u{2618}u{261D}u{2620}u{2622}u{2623}u{2626}u{262A}u{262E}u{262F}u{2638}-u{263A}u{2640}u{2642}u{2648}-u{2653}u{265F}u{2660}u{2663}u{2665}u{2666}u{2668}u{267B}u{267E}u{267F}u{2692}-u{2697}u{2699}u{269B}u{269C}u{26A0}u{26A1}u{26A7}u{26AA}u{26AB}u{26B0}u{26B1}u{26BD}u{26BE}u{26C4}u{26C5}u{26C8}u{26CE}u{26CF}u{26D1}u{26D3}u{26D4}u{26E9}u{26EA}u{26F0}-u{26F5}u{26F7}-u{26FA}u{26FD}u{2702}u{2705}u{2708}-u{270D}u{270F}u{2712}u{2714}u{2716}u{271D}u{2721}u{2728}u{2733}u{2734}u{2744}u{2747}u{274C}u{274E}u{2753}-u{2755}u{2757}u{2763}u{2764}u{2795}-u{2797}u{27A1}u{27B0}u{27BF}u{2934}u{2935}u{2B05}-u{2B07}u{2B1B}u{2B1C}u{2B50}u{2B55}u{3030}u{303D}u{3297}u{3299}]|u{D83C}[u{DC04}u{DCCF}u{DD70}u{DD71}u{DD7E}u{DD7F}u{DD8E}u{DD91}-u{DD9A}u{DDE6}-u{DDFF}u{DE01}u{DE02}u{DE1A}u{DE2F}u{DE32}-u{DE3A}u{DE50}u{DE51}u{DF00}-u{DF21}u{DF24}-u{DF93}u{DF96}u{DF97}u{DF99}-u{DF9B}u{DF9E}-u{DFF0}u{DFF3}-u{DFF5}u{DFF7}-u{DFFF}]|u{D83D}[u{DC00}-u{DCFD}u{DCFF}-u{DD3D}u{DD49}-u{DD4E}u{DD50}-u{DD67}u{DD6F}u{DD70}u{DD73}-u{DD7A}u{DD87}u{DD8A}-u{DD8D}u{DD90}u{DD95}u{DD96}u{DDA4}u{DDA5}u{DDA8}u{DDB1}u{DDB2}u{DDBC}u{DDC2}-u{DDC4}u{DDD1}-u{DDD3}u{DDDC}-u{DDDE}u{DDE1}u{DDE3}u{DDE8}u{DDEF}u{DDF3}u{DDFA}-u{DE4F}u{DE80}-u{DEC5}u{DECB}-u{DED2}u{DED5}-u{DED7}u{DEE0}-u{DEE5}u{DEE9}u{DEEB}u{DEEC}u{DEF0}u{DEF3}-u{DEFC}u{DFE0}-u{DFEB}]|u{D83E}[u{DD0C}-u{DD3A}u{DD3C}-u{DD45}u{DD47}-u{DD78}u{DD7A}-u{DDCB}u{DDCD}-u{DDFF}u{DE70}-u{DE74}u{DE78}-u{DE7A}u{DE80}-u{DE86}u{DE90}-u{DEA8}u{DEB0}-u{DEB6}u{DEC0}-u{DEC2}u{DED0}-u{DED6}])u{FE0F}|(?:[u{261D}u{26F9}u{270A}-u{270D}]|u{D83C}[u{DF85}u{DFC2}-u{DFC4}u{DFC7}u{DFCA}-u{DFCC}]|u{D83D}[u{DC42}u{DC43}u{DC46}-u{DC50}u{DC66}-u{DC78}u{DC7C}u{DC81}-u{DC83}u{DC85}-u{DC87}u{DC8F}u{DC91}u{DCAA}u{DD74}u{DD75}u{DD7A}u{DD90}u{DD95}u{DD96}u{DE45}-u{DE47}u{DE4B}-u{DE4F}u{DEA3}u{DEB4}-u{DEB6}u{DEC0}u{DECC}]|u{D83E}[u{DD0C}u{DD0F}u{DD18}-u{DD1F}u{DD26}u{DD30}-u{DD39}u{DD3C}-u{DD3E}u{DD77}u{DDB5}u{DDB6}u{DDB8}u{DDB9}u{DDBB}u{DDCD}-u{DDCF}u{DDD1}-u{DDDD}]))');

  List<String> list = [];
  var matches = regex.allMatches(text);
  int pos = 0;
  matches.forEach((match) {
    list.addAll([
      text.substring(pos, match.start),
      match[0],
    ]);
    pos = match.end;
  });
  if (pos != text.length) list.add(text.substring(pos, text.length));
  return list;
}
 

Я предлагаю проверить пакет emojis для многих других полезных утилит emoji.