pkgs/markdown/lib/src/inline_syntaxes/emphasis_syntax.dart

// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import '../charcode.dart';
import 'delimiter_syntax.dart';

class EmphasisSyntax extends DelimiterSyntax {
  /// Parses `__strong__` and `_emphasis_`.
  EmphasisSyntax.underscore()
    : super(
        '_+',
        requiresDelimiterRun: true,
        tags: _tags,
        startCharacter: $underscore,
      );

  /// Parses `**strong**` and `*emphasis*`.
  EmphasisSyntax.asterisk()
    : super(
        r'\*+',
        requiresDelimiterRun: true,
        allowIntraWord: true,
        tags: _tags,
        startCharacter: $asterisk,
      );

  static final _tags = [DelimiterTag('em', 1), DelimiterTag('strong', 2)];
}