/*
    Copyright (C) 2014-2019 de4dot@gmail.com

    This file is part of dnSpy

    dnSpy is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    dnSpy is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with dnSpy.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using dnSpy.Contracts.Hex.Classification;

namespace dnSpy.Contracts.Hex.Formatting {
	/// <summary>
	/// A <see cref="HexClassifier"/> that does nothing
	/// </summary>
	static class NullHexClassifier {
		/// <summary>
		/// Gets the instance
		/// </summary>
		public static readonly HexClassifier Instance = new RealNullHexClassifier();

		sealed class RealNullHexClassifier : HexClassifier {
			public override event EventHandler<HexClassificationChangedEventArgs>? ClassificationChanged {
				add { }
				remove { }
			}

			public override void GetClassificationSpans(List<HexClassificationSpan> result, HexClassificationContext context) { }
		}
	}
}