expandable_richtext 1.0.6

A text widget which you can use to initially only show a defined number of lines of a probably long text. it also support clickable @‌mention,

example/lib/main.dart

import 'package:example/values/strings.dart';
import 'package:example/values/styles.dart';
import 'package:expandable_richtext/expandable_richtext_controller.dart';
import 'package:flutter/material.dart';
import 'package:expandable_richtext/expandable_rich_text.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    const title = "Expandable Rich Text Example";
    return MaterialApp(
      title: title,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: title),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    //margin
    const verticalMargin = SizedBox(
      height: 20,
    );
    const titleMargin = SizedBox(
      height: 8,
    );

    //simple text
    Text simpleTextTitle = Text(
      titleSimpleText,
      style: titleTextStyle,
    );

    //simple expandable text
    Text simpleExpandableTextTitle = Text(
      titleSimpleExpandableText,
      style: titleTextStyle,
    );

    //mention text
    Text mentionTextTitle = Text(
      titleMentionText,
      style: titleTextStyle,
    );

    //hashtag text
    Text hashtagTextTitle = Text(
      titleHashtagText,
      style: titleTextStyle,
    );

    //url text
    Text urlTextTitle = Text(
      titleUrlText,
      style: titleTextStyle,
    );

    //custom tag text
    Text customTagTitle = Text(
      titleCustomTagText,
      style: titleTextStyle,
    );

    //multiple custom tag text
    Text multiCustomTagTitle = Text(
      titleMultipleCustomTagText,
      style: titleTextStyle,
    );

    //all text
    Text allTextTitle = Text(
      titleAllText,
      style: titleTextStyle,
    );

    //programmatically handle text toggle
    Text programmaticallyHandleTitle = Text(
      titleProgrammaticallyHandle,
      style: titleTextStyle,
    );

    /// a text to collapse and expand programmatically
    final programmaticExpandableRichText = ExpandableRichText(
      plainText,
      controller: ExpandableRichTextController(),
      expandText: expandingText,
      collapseText: collapsingText,
    );

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ListView(
        padding: const EdgeInsets.all(20),
        shrinkWrap: true,
        children: [
          simpleTextTitle,
          titleMargin,
          const ExpandableRichText(
            plainText, //assume this comes from backend
          ),
          verticalMargin,
          simpleExpandableTextTitle,
          titleMargin,
          ExpandableRichText(
            plainText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
          ),
          verticalMargin,
          mentionTextTitle,
          titleMargin,
          ExpandableRichText(
            mentionText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            mentionStyle: mentionTextStyle,
          ),
          verticalMargin,
          hashtagTextTitle,
          titleMargin,
          ExpandableRichText(
            hashTagText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            hashtagStyle: hashTagTextStyle,
          ),
          verticalMargin,
          urlTextTitle,
          titleMargin,
          ExpandableRichText(
            urlText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            urlStyle: urlTextStyle,
          ),
          verticalMargin,
          customTagTitle,
          titleMargin,
          ExpandableRichText(
            tagsText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            customTagStyle: customTagStyle,
          ),
          verticalMargin,
          multiCustomTagTitle,
          titleMargin,
          ExpandableRichText(
            tagsText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            customTagStyles: customTagStyleMap,
          ),
          verticalMargin,
          allTextTitle,
          titleMargin,
          ExpandableRichText(
            allText, //assume this comes from backend
            expandText: expandingText,
            collapseText: collapsingText,
            toggleTextStyle: linkTextStyle,
            mentionStyle: mentionTextStyle,
            hashtagStyle: hashTagTextStyle,
            customTagStyle: customTagStyle,
          ),
          verticalMargin,
          programmaticallyHandleTitle,
          titleMargin,
          Align(
            alignment: Alignment.topLeft,
            child: ElevatedButton(
                onPressed: () =>
                    {programmaticExpandableRichText.controller?.toggleText()},
                child: const Text("Toggle")),
          ),
          titleMargin,
          programmaticExpandableRichText
        ],
      ),
    );
  }
}