comment.dart

// Copyright 2019 Google Inc. Use of this source code is governed by an
// MIT-style license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.

import 'package:charcode/charcode.dart';
import 'package:source_span/source_span.dart';

import '../../../visitor/interface/modifiable_css.dart';
import '../comment.dart';
import 'node.dart';

/// A modifiable version of [CssComment] for use in the evaluation step.
class ModifiableCssComment extends ModifiableCssNode implements CssComment {
  final String text;
  final FileSpan span;
  final bool _isTrailing;

  bool get isPreserved => text.codeUnitAt(2) == $exclamation;
  bool get isTrailing => _isTrailing;

  ModifiableCssComment(this.text, this.span, this._isTrailing);

  T accept<T>(ModifiableCssVisitor<T> visitor) => visitor.visitCssComment(this);
}