GestureRecognizerBuilder that hold and dispose GestureRecognizers for RichText

gesture.dart

// MIT @najeira

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

typedef GestureRecognizerWidgetBuilder = Widget Function(
    BuildContext, Map<String, TapGestureRecognizer>);

class GestureRecognizerBuilder extends StatefulWidget {
  const GestureRecognizerBuilder({
    Key? key,
    required this.builder,
  }) : super(key: key);

  final GestureRecognizerWidgetBuilder builder;

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

class _GestureRecognizerBuilderState extends State<GestureRecognizerBuilder> {
  final _recognizers = <String, TapGestureRecognizer>{};

  @override
  void dispose() {
    for (final recognizer in _recognizers.values) {
      recognizer.dispose();
    }
    _recognizers.clear();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return widget.builder(context, _recognizers);
  }
}

usage.dart

class _MyText extends StatelessWidget {
  const _MyText({
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GestureRecognizerBuilder(
      builder: (context, recognizers) {
        final foo = recognizers.putIfAbsent(
          "foo",
          () => TapGestureRecognizer(),
        )..onTap = () {
            // なにか
          };
        final bar = recognizers.putIfAbsent(
          "bar",
          () => TapGestureRecognizer(),
        )..onTap = () {
            // なにか
          };
        return RichText(
          text: TextSpan(
            children: [
              TextSpan(
                text: "link 1",
                recognizer: foo,
              ),
              TextSpan(
                text: "link 2",
                recognizer: bar,
              ),
            ],
          ),
        );
      },
    );
  }
}

hello