easy_rich_text 0.5.5

The EasyRichText widget provides an easy way to use RichText. You do not have to split the string manually.

example/lib/main.dart

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:easy_rich_text/easy_rich_text.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'EasyRichText Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'EasyRichText Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              //trademark example
              EasyRichText(
                "ProductTM is a superscript trademark symbol. This TM is not a trademark.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'TM',
                    superScript: true,
                    stringBeforeTarget: 'Product',
                    matchWordBoundaries: false,
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),
              //simple example
              EasyRichText(
                "I want blue font. I want bold font. I want italic font.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'italic',
                    style: TextStyle(fontStyle: FontStyle.italic),
                  ),
                  EasyRichTextPattern(
                    targetString: 'blue',
                    style: TextStyle(color: Colors.blue),
                  ),
                  EasyRichTextPattern(
                    targetString: 'bold',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                ],
              ),

              ///list of targetString have same text decoration.
              EasyRichText(
                "bold1 TEST bold2 TEST bold3",
                patternList: [
                  EasyRichTextPattern(
                    targetString: ['bold1', 'bold2', 'bold3'],
                    style: TextStyle(fontWeight: FontWeight.bold),
                  )
                ],
              ),

              //default style
              EasyRichText(
                "This is a EasyRichText example with default grey font. I want blue font here.",
                defaultStyle: TextStyle(color: Colors.grey),
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'blue',
                    style: TextStyle(color: Colors.blue),
                  ),
                  EasyRichTextPattern(
                    targetString: 'bold',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                ],
              ),
              //superscript and subscript
              EasyRichText(
                "I want superscript font here. I want subscript here",
                patternList: [
                  EasyRichTextPattern(
                      targetString: 'superscript', superScript: true),
                  EasyRichTextPattern(
                      targetString: 'subscript', subScript: true),
                ],
              ),
              //conditional match
              EasyRichText(
                "I want blue color here. I want no blue font here. I want blue invalid here.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'blue',
                    stringBeforeTarget: 'want',
                    stringAfterTarget: "color",
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),
              //matchOption can be a string or a list
              //string: 'all', 'first', 'last'
              //List<dynamic>:'first', 'last', and any integer index
              //For example, [0, 1, 'last'] will match the first, second, and last one.
              EasyRichText(
                "blue 1, blue 2, blue 3, blue 4, blue 5",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'blue',
                    //matchOption: 'all'
                    matchOption: [0, 1, 'last'],
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),

              //All RichText properties accessible
              EasyRichText(
                "TextOverflow.ellipsis, TextAlign.justify, maxLines: 1. TextOverflow.ellipsis, TextAlign.justify, maxLines: 1.",
                textAlign: TextAlign.justify,
                maxLines: 1,
                overflow: TextOverflow.ellipsis,
              ),

              //regular expression
              EasyRichText(
                "Regular Expression. I want blue bluea blue1 but not blueA",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'bl[a-z0-9]*',
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),

              //case insensitivity
              EasyRichText(
                "Case-Insensitive String Matching. I want both Blue and blue.",
                caseSensitive: false,
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'Blue',
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),

              //selectable.
              EasyRichText(
                "This paragraph is selectable...",
                selectable: true,
              ),

              ///urls, will disable superscript and subscript
              EasyRichText(
                "Here is a website https://pub.dev/packages/easy_rich_text. Here is a email address [e-mail]. Here is a telephone number [phone].",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'https://pub.dev/packages/easy_rich_text',
                    urlType: 'web',
                    style: TextStyle(
                      decoration: TextDecoration.underline,
                    ),
                  ),
                  EasyRichTextPattern(
                    targetString: EasyRegexPattern.emailPattern,
                    urlType: 'email',
                    style: TextStyle(
                      decoration: TextDecoration.underline,
                    ),
                  ),
                  EasyRichTextPattern(
                    targetString: EasyRegexPattern.webPattern,
                    urlType: 'web',
                    style: TextStyle(
                      decoration: TextDecoration.underline,
                    ),
                  ),
                  EasyRichTextPattern(
                    targetString: EasyRegexPattern.telPattern,
                    urlType: 'tel',
                    style: TextStyle(
                      decoration: TextDecoration.underline,
                    ),
                  ),
                ],
              ),

              ///GestureRecognizer, not working when superscript, subscript, or urlType is set.
              ///TapGestureRecognizer, MultiTapGestureRecognizer, etc.
              EasyRichText(
                "Tap recognizer to print this sentence.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'recognizer',
                    recognizer: TapGestureRecognizer()
                      ..onTap = () {
                        print("Tap recognizer to print this sentence.");
                      },
                    style: TextStyle(
                      decoration: TextDecoration.underline,
                    ),
                  ),
                ],
              ),

              //if the targetString contains the following special characters \[]()^*+?
              EasyRichText(
                "Received 88+ messages. Received 99+ messages ()",
                patternList: [
                  //set hasSpecialCharacters to true
                  EasyRichTextPattern(
                    targetString: '99+(',
                    hasSpecialCharacters: true,
                    style: TextStyle(color: Colors.blue),
                  ),
                  //or if you are familiar with regular expressions, then use \\ to skip it
                  EasyRichTextPattern(
                    targetString: '88\\+',
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),

              ///WhatsApp like text formatter
              EasyRichText(
                "TEST *bold font*. test *boldfont*.",
                patternList: [
                  ///bold font
                  EasyRichTextPattern(
                    targetString: '(\\*)(.*?)(\\*)',
                    matchBuilder: (BuildContext context, RegExpMatch match) {
                      return TextSpan(
                        text: match[0].replaceAll('*', ''),
                        style: TextStyle(fontWeight: FontWeight.bold),
                      );
                    },
                  ),
                ],
              ),

              //know issue
              EasyRichText(
                "This is a EasyRichText example. I want whole sentence blue. I want whole sentence bold.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'blue',
                    style: TextStyle(color: Colors.blue),
                  ),
                  EasyRichTextPattern(
                    targetString: 'I want whole sentence blue',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                  EasyRichTextPattern(
                    targetString: 'I want whole sentence bold',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                ],
              ),

              //Chinese Character
              EasyRichText(
                "I want 世界你好 here. I want not 世界你好 font here.",
                patternList: [
                  EasyRichTextPattern(
                    targetString: '世界',
                    stringBeforeTarget: 'want ',
                    style: TextStyle(color: Colors.blue),
                  ),
                ],
              ),

              //Arabic Character
              EasyRichText(
                "الحياة أكثر من مجرد الحاضر",
                patternList: [
                  EasyRichTextPattern(
                    targetString: 'من',
                    style: TextStyle(color: Colors.blue),
                  )
                ],
                defaultStyle: TextStyle(color: Colors.red),
              ),
            ],
          ),
        ),
      ),
    );
  }
}