fluffychat/lib/pangea/message_token_text/dotted_border_painter.dart

import 'package:flutter/material.dart';

class DottedBorderPainter extends CustomPainter {
  final Color color;
  final double strokeWidth;
  final double dashWidth;
  final double dashSpace;
  final BorderRadius borderRadius;

  DottedBorderPainter({
    required this.color,
    this.strokeWidth = 2.0,
    this.dashWidth = 4.0,
    this.dashSpace = 4.0,
    required this.borderRadius,
  });

  @override
  void paint(Canvas canvas, Size size) {
    final paint = Paint()
      ..color = color
      ..strokeWidth = strokeWidth
      ..style = PaintingStyle.stroke;

    final path = Path()
      ..addRRect(
        borderRadius.toRRect(Rect.fromLTWH(0, 0, size.width, size.height)),
      );

    final dashPath = Path();
    final pathMetrics = path.computeMetrics();
    for (final pathMetric in pathMetrics) {
      double distance = 0.0;
      while (distance < pathMetric.length) {
        final segment = pathMetric.extractPath(distance, distance + dashWidth);
        dashPath.addPath(segment, Offset.zero);
        distance += dashWidth + dashSpace;
      }
    }

    canvas.drawPath(dashPath, paint);
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }
}