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A Flutter plugin than allow expand and collapse text dynamically

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# readmore

A Flutter plugin that allows for expanding and collapsing text with the added capability to style and interact with specific patterns in the text like hashtags, URLs, and mentions using the `Annotation` feature.

![](https://raw.githubusercontent.com/jonataslaw/readmore/master/read-more-text-view-flutter.gif)

## Usage:

Add the package to your pubspec.yaml:

```yaml
readmore: ^3.0.0
```

Then, import it in your Dart code:

```dart
import 'package:readmore/readmore.dart';
```

### Basic Example

```dart
ReadMoreText(
  'Flutter is Google’s mobile UI open source framework to build high-quality native (super fast) interfaces for iOS and Android apps with the unified codebase.',
  trimMode: TrimMode.Line,
  trimLines: 2,
  colorClickableText: Colors.pink,
  trimCollapsedText: 'Show more',
  trimExpandedText: 'Show less',
  moreStyle: TextStyle(fontSize: 14, fontWeight: FontWeight.bold),
);
```

### Rich Text Example

With the `ReadMoreText.rich` constructor, you can create text with rich formatting, including different colors, decorations, letter spacing, and interactive elements within a single widget.

```dart
ReadMoreText.rich(
  TextSpan(
    style: const TextStyle(color: Colors.black),
    children: [
      const TextSpan(text: 'Rich '),
      const TextSpan(
        text: 'Text',
        style: TextStyle(
          color: Colors.blue,
          decoration: TextDecoration.underline,
          letterSpacing: 5,
          recognizer: TapGestureRecognizer()..onTap = () {
            // Handle tap
          },
        ),
      ),
    ],
  ),
  trimMode: TrimMode.Line,
  trimLines: 2,
  colorClickableText: Colors.pink,
  trimCollapsedText: '...Read more',
  trimExpandedText: ' Less',
);
```

### Using Annotations

The `Annotation` feature enhances the interactivity and functionality of the text content. You can define custom styles and interactions for patterns like hashtags, URLs, and mentions.

```dart
ReadMoreText(
  'This is a sample text with a #hashtag, a mention <@123>, and a URL: https://example.com.',
  trimMode: TrimMode.Line,
  trimLines: 2,
  colorClickableText: Colors.pink,
  annotations: [
    Annotation(
      regExp: RegExp(r'#([a-zA-Z0-9_]+)'),
      spanBuilder: ({required String text, required TextStyle textStyle}) => TextSpan(
        text: text,
        style: textStyle.copyWith(color: Colors.blue),
      ),
    ),
    Annotation(
      regExp: RegExp(r'<@(\d+)>'),
      spanBuilder: ({required String text, required TextStyle textStyle}) => TextSpan(
        text: 'User123',
        style: textStyle.copyWith(color: Colors.green),
        recognizer: TapGestureRecognizer()..onTap = () {
          // Handle tap, e.g., navigate to a user profile
        },
      ),
    ),
    // Additional annotations for URLs...
  ],
  moreStyle: TextStyle(fontSize: 14, fontWeight: FontWeight.bold),
);
```

_Note: This feature is not available with the `ReadMoreText.rich` constructor, as `TextSpan` gives you total control over styling and adding interactions to parts of the text._

readmore

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